diff --git a/GrafikaProjekt/pliki/PhysXCommon_32.dll b/GrafikaProjekt/pliki/PhysXCommon_32.dll deleted file mode 100644 index fe50ffc..0000000 Binary files a/GrafikaProjekt/pliki/PhysXCommon_32.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/PhysXCooking_32.dll b/GrafikaProjekt/pliki/PhysXCooking_32.dll deleted file mode 100644 index 8617ed9..0000000 Binary files a/GrafikaProjekt/pliki/PhysXCooking_32.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/PhysXDevice.dll b/GrafikaProjekt/pliki/PhysXDevice.dll deleted file mode 100644 index 1d435bb..0000000 Binary files a/GrafikaProjekt/pliki/PhysXDevice.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/PhysXFoundation_32.dll b/GrafikaProjekt/pliki/PhysXFoundation_32.dll deleted file mode 100644 index bd37c68..0000000 Binary files a/GrafikaProjekt/pliki/PhysXFoundation_32.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/PhysXGpu_32.dll b/GrafikaProjekt/pliki/PhysXGpu_32.dll deleted file mode 100644 index 8ec59cf..0000000 Binary files a/GrafikaProjekt/pliki/PhysXGpu_32.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/PhysX_32.dll b/GrafikaProjekt/pliki/PhysX_32.dll deleted file mode 100644 index b9f298e..0000000 Binary files a/GrafikaProjekt/pliki/PhysX_32.dll and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/arm.blend b/GrafikaProjekt/pliki/models/arm.blend deleted file mode 100644 index 0f25ee9..0000000 Binary files a/GrafikaProjekt/pliki/models/arm.blend and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/arm.fbx b/GrafikaProjekt/pliki/models/arm.fbx deleted file mode 100644 index b10ff53..0000000 Binary files a/GrafikaProjekt/pliki/models/arm.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/blade-runner-style-cityscapes.fbx b/GrafikaProjekt/pliki/models/blade-runner-style-cityscapes.fbx deleted file mode 100644 index cc79839..0000000 Binary files a/GrafikaProjekt/pliki/models/blade-runner-style-cityscapes.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/city_small.fbx b/GrafikaProjekt/pliki/models/city_small.fbx deleted file mode 100644 index f5c2d1d..0000000 Binary files a/GrafikaProjekt/pliki/models/city_small.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/flying_car.fbx b/GrafikaProjekt/pliki/models/flying_car.fbx deleted file mode 100644 index 35738fc..0000000 Binary files a/GrafikaProjekt/pliki/models/flying_car.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/flying_car_2.fbx b/GrafikaProjekt/pliki/models/flying_car_2.fbx deleted file mode 100644 index e93ff25..0000000 Binary files a/GrafikaProjekt/pliki/models/flying_car_2.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/flying_car_3.fbx b/GrafikaProjekt/pliki/models/flying_car_3.fbx deleted file mode 100644 index 02073ff..0000000 Binary files a/GrafikaProjekt/pliki/models/flying_car_3.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/models/path.fbx b/GrafikaProjekt/pliki/models/path.fbx deleted file mode 100644 index e323da8..0000000 Binary files a/GrafikaProjekt/pliki/models/path.fbx and /dev/null differ diff --git a/GrafikaProjekt/pliki/projekt.vcxproj b/GrafikaProjekt/pliki/projekt.vcxproj index 07978f6..7b64f74 100644 --- a/GrafikaProjekt/pliki/projekt.vcxproj +++ b/GrafikaProjekt/pliki/projekt.vcxproj @@ -11,49 +11,41 @@ - - - - - - - - - - - - - - - + + + + - - - - + + + + + + + + + + + + + - - - - - - - {DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290} + {10701B86-9B0B-46A1-85DA-6238CBCC507B} Win32Proj - scenaPodwodna + grk-cw6 10.0 - scena_podwodna + grk-cw6 diff --git a/GrafikaProjekt/pliki/projekt.vcxproj.filters b/GrafikaProjekt/pliki/projekt.vcxproj.filters index 0b006ca..f0e32e4 100644 --- a/GrafikaProjekt/pliki/projekt.vcxproj.filters +++ b/GrafikaProjekt/pliki/projekt.vcxproj.filters @@ -14,67 +14,76 @@ rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms - {e9364a22-c274-41c1-9f8e-146ccf27d19a} + {0a247bb8-2e8e-4a90-b0ef-17415b0941ba} + + + {1e762b0e-a07f-4d7a-aedf-9503776529c7} - + Source Files - - + + Source Files - - + + Source Files - + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files + + + Source Files + + + Source Files - - Source Files - - - Source Files - Source Files Source Files - + Source Files + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + + + Source Files\SOIL + Source Files - - - Source Files - - - Source Files - - - Source Files - - - Source Files - - - Source Files - - - Source Files - - - Source Files - - - Source Files - - Shader Files @@ -82,41 +91,11 @@ Shader Files - - Shader Files - - - Shader Files - - - Shader Files - - - Shader Files - Shader Files Shader Files - - Shader Files - - - Shader Files - - - Shader Files - - - Shader Files - - - Shader Files - - - Shader Files - \ No newline at end of file diff --git a/GrafikaProjekt/pliki/render.py b/GrafikaProjekt/pliki/render.py deleted file mode 100644 index 8cc2be2..0000000 --- a/GrafikaProjekt/pliki/render.py +++ /dev/null @@ -1,7 +0,0 @@ - -import os -rootdir = './' -for filename in os.listdir(rootdir): - if filename.endswith(".md"): - name = filename[:-3] - os.system(f'pandoc -s -o {name}.html {name}.md --css style.css') \ No newline at end of file diff --git a/GrafikaProjekt/pliki/shaders/shader_4_1.frag b/GrafikaProjekt/pliki/shaders/shader_4_1.frag deleted file mode 100644 index ddc92ab..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_4_1.frag +++ /dev/null @@ -1,21 +0,0 @@ -#version 410 core - -uniform vec3 objectColor; -//uniform vec3 lightDir; -uniform vec3 lightPos; -uniform vec3 cameraPos; - -in vec3 interpNormal; -in vec3 fragPos; - -void main() -{ - vec3 lightDir = normalize(lightPos-fragPos); - vec3 V = normalize(cameraPos-fragPos); - vec3 normal = normalize(interpNormal); - vec3 R = reflect(-normalize(lightDir),normal); - - float specular = pow(max(0,dot(R,V)),10); - float diffuse = max(0,dot(normal,normalize(lightDir))); - gl_FragColor = vec4(mix(objectColor,objectColor*diffuse+vec3(1)*specular,0.9), 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_4_1.vert b/GrafikaProjekt/pliki/shaders/shader_4_1.vert deleted file mode 100644 index 9226e04..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_4_1.vert +++ /dev/null @@ -1,17 +0,0 @@ -#version 410 core - -layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec2 vertexTexCoord; -layout(location = 2) in vec3 vertexNormal; - -uniform mat4 transformation; -uniform mat4 modelMatrix; -out vec3 interpNormal; -out vec3 fragPos; - -void main() -{ - gl_Position = transformation * vec4(vertexPosition, 1.0); - interpNormal = (modelMatrix*vec4(vertexNormal,0)).xyz; - fragPos = (modelMatrix*vec4(vertexPosition,1)).xyz; -} diff --git a/GrafikaProjekt/pliki/shaders/shader_4_sun.frag b/GrafikaProjekt/pliki/shaders/shader_4_sun.frag deleted file mode 100644 index 1cd42e9..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_4_sun.frag +++ /dev/null @@ -1,17 +0,0 @@ -#version 410 core - -uniform vec3 objectColor; -//uniform vec3 lightDir; -uniform vec3 lightPos; -uniform vec3 cameraPos; - -in vec3 interpNormal; -in vec3 fragPos; - -void main() -{ - vec3 normal = normalize(interpNormal); - vec3 V = normalize(cameraPos-fragPos); - float coef = max(0,dot(V,normal)); - gl_FragColor = vec4(mix(objectColor,vec3(1,0.5,0.1),1-coef), 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_4_sun.vert b/GrafikaProjekt/pliki/shaders/shader_4_sun.vert deleted file mode 100644 index 9226e04..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_4_sun.vert +++ /dev/null @@ -1,17 +0,0 @@ -#version 410 core - -layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec2 vertexTexCoord; -layout(location = 2) in vec3 vertexNormal; - -uniform mat4 transformation; -uniform mat4 modelMatrix; -out vec3 interpNormal; -out vec3 fragPos; - -void main() -{ - gl_Position = transformation * vec4(vertexPosition, 1.0); - interpNormal = (modelMatrix*vec4(vertexNormal,0)).xyz; - fragPos = (modelMatrix*vec4(vertexPosition,1)).xyz; -} diff --git a/GrafikaProjekt/pliki/shaders/shader_color.frag b/GrafikaProjekt/pliki/shaders/shader_color.frag index 708caa7..fa3b562 100644 --- a/GrafikaProjekt/pliki/shaders/shader_color.frag +++ b/GrafikaProjekt/pliki/shaders/shader_color.frag @@ -8,7 +8,6 @@ in vec3 interpNormal; void main() { vec3 normal = normalize(interpNormal); - float ambient = 0.2; float diffuse = max(dot(normal, -lightDir), 0.0); - gl_FragColor = vec4(objectColor * (ambient + (1-ambient) * diffuse), 1.0); + gl_FragColor = vec4(objectColor * diffuse, 1.0); } diff --git a/GrafikaProjekt/pliki/shaders/shader_color.vert b/GrafikaProjekt/pliki/shaders/shader_color.vert index fc9d5e4..b01a9f8 100644 --- a/GrafikaProjekt/pliki/shaders/shader_color.vert +++ b/GrafikaProjekt/pliki/shaders/shader_color.vert @@ -1,8 +1,8 @@ #version 410 core layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec2 vertexTexCoord; -layout(location = 2) in vec3 vertexNormal; +layout(location = 1) in vec3 vertexNormal; +layout(location = 2) in vec2 vertexTexCoord; uniform mat4 modelViewProjectionMatrix; uniform mat4 modelMatrix; diff --git a/GrafikaProjekt/pliki/shaders/shader_red.frag b/GrafikaProjekt/pliki/shaders/shader_red.frag deleted file mode 100644 index 8c75cef..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_red.frag +++ /dev/null @@ -1,6 +0,0 @@ -#version 410 core - -void main() -{ - gl_FragColor = vec4(1.0,0.0,0.0, 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_red.vert b/GrafikaProjekt/pliki/shaders/shader_red.vert deleted file mode 100644 index 0ce28cf..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_red.vert +++ /dev/null @@ -1,10 +0,0 @@ -#version 410 core - -layout(location = 0) in vec3 vertexPosition; -uniform mat4 modelViewProjectionMatrix; - - -void main() -{ - gl_Position = modelViewProjectionMatrix * vec4(vertexPosition, 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_spec_tex.frag b/GrafikaProjekt/pliki/shaders/shader_spec_tex.frag deleted file mode 100644 index 4133c4e..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_spec_tex.frag +++ /dev/null @@ -1,29 +0,0 @@ -#version 410 core - -//uniform vec3 objectColor; -uniform vec3 lightDir; -//uniform vec3 lightPos; -uniform vec3 cameraPos; -uniform sampler2D color_texture; -uniform sampler2D specular_texture; - - -in vec3 interpNormal; -in vec3 fragPos; -in vec2 uvCoord; - -void main() -{ - //float falloff = pow(length(cameraPos-fragPos),2)*0.01; - vec3 color = texture(color_texture,uvCoord).rgb; - vec3 spec = texture(specular_texture,uvCoord).rgb; - //vec3 lightDir = normalize(lightPos-fragPos); - vec3 V = normalize(cameraPos-fragPos); - vec3 normal = normalize(interpNormal); - vec3 R = reflect(-normalize(lightDir),normal); - - float specular = pow(max(0,dot(R,V)),10); - float diffuse = max(0,dot(normal,normalize(lightDir))); - gl_FragColor = vec4(mix(color,color*diffuse+spec*specular,0.7), 1.0); - //gl_FragColor = vec4(mix(vec3(0.1,0.1,0.1),mix(color,color*diffuse+spec*specular,0.7),min(1,1/falloff)), 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_spec_tex.vert b/GrafikaProjekt/pliki/shaders/shader_spec_tex.vert deleted file mode 100644 index db7afb3..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_spec_tex.vert +++ /dev/null @@ -1,19 +0,0 @@ -#version 410 core - -layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec3 vertexNormal; -layout(location = 2) in vec2 vertexTexCoord; - -uniform mat4 transformation; -uniform mat4 modelMatrix; -out vec3 interpNormal; -out vec3 fragPos; -out vec2 uvCoord; - -void main() -{ - uvCoord = vertexTexCoord; - gl_Position = transformation * vec4(vertexPosition, 1.0); - interpNormal = (modelMatrix*vec4(vertexNormal,0)).xyz; - fragPos = (modelMatrix*vec4(vertexPosition,1)).xyz; -} diff --git a/GrafikaProjekt/pliki/shaders/shader_tex.frag b/GrafikaProjekt/pliki/shaders/shader_tex.frag index d87b3e1..08c1ade 100644 --- a/GrafikaProjekt/pliki/shaders/shader_tex.frag +++ b/GrafikaProjekt/pliki/shaders/shader_tex.frag @@ -11,7 +11,6 @@ void main() vec2 modifiedTexCoord = vec2(interpTexCoord.x, 1.0 - interpTexCoord.y); // Poprawka dla tekstur Ziemi, ktore bez tego wyswietlaja sie 'do gory nogami' vec3 color = texture2D(textureSampler, modifiedTexCoord).rgb; vec3 normal = normalize(interpNormal); - float ambient = 0.2; float diffuse = max(dot(normal, -lightDir), 0.0); - gl_FragColor = vec4(color * (ambient + (1-ambient) * diffuse), 1.0); + gl_FragColor = vec4(color * diffuse, 1.0); } diff --git a/GrafikaProjekt/pliki/shaders/shader_tex.vert b/GrafikaProjekt/pliki/shaders/shader_tex.vert index 60ff4b4..c0e1d86 100644 --- a/GrafikaProjekt/pliki/shaders/shader_tex.vert +++ b/GrafikaProjekt/pliki/shaders/shader_tex.vert @@ -1,9 +1,9 @@ #version 410 core layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec2 vertexTexCoord; -layout(location = 2) in vec3 vertexNormal; +layout(location = 1) in vec3 vertexNormal; +layout(location = 2) in vec2 vertexTexCoord; uniform mat4 modelViewProjectionMatrix; uniform mat4 modelMatrix; diff --git a/GrafikaProjekt/pliki/shaders/shader_tex_2.frag b/GrafikaProjekt/pliki/shaders/shader_tex_2.frag deleted file mode 100644 index a65bc8d..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_tex_2.frag +++ /dev/null @@ -1,28 +0,0 @@ -#version 410 core - -//uniform vec3 objectColor; -uniform vec3 lightDir; -//uniform vec3 lightPos; -uniform vec3 cameraPos; -uniform sampler2D color_texture; - - -in vec3 interpNormal; -in vec3 fragPos; -in vec2 uvCoord; - -void main() -{ - //float falloff = pow(length(cameraPos-fragPos),2)*0.01; - vec3 color = texture(color_texture,uvCoord).rgb; - vec3 spec = vec3(0.7); - //vec3 lightDir = normalize(lightPos-fragPos); - vec3 V = normalize(cameraPos-fragPos); - vec3 normal = normalize(interpNormal); - vec3 R = reflect(-normalize(lightDir),normal); - - float specular = pow(max(0,dot(R,V)),10); - float diffuse = max(0,dot(normal,normalize(lightDir))); - gl_FragColor = vec4(mix(color,color*diffuse+spec*specular,0.7), 1.0); - //gl_FragColor = vec4(mix(vec3(0.1,0.1,0.1),mix(color,color*diffuse+spec*specular,0.7),min(1,1/falloff)), 1.0); -} diff --git a/GrafikaProjekt/pliki/shaders/shader_tex_2.vert b/GrafikaProjekt/pliki/shaders/shader_tex_2.vert deleted file mode 100644 index db7afb3..0000000 --- a/GrafikaProjekt/pliki/shaders/shader_tex_2.vert +++ /dev/null @@ -1,19 +0,0 @@ -#version 410 core - -layout(location = 0) in vec3 vertexPosition; -layout(location = 1) in vec3 vertexNormal; -layout(location = 2) in vec2 vertexTexCoord; - -uniform mat4 transformation; -uniform mat4 modelMatrix; -out vec3 interpNormal; -out vec3 fragPos; -out vec2 uvCoord; - -void main() -{ - uvCoord = vertexTexCoord; - gl_Position = transformation * vec4(vertexPosition, 1.0); - interpNormal = (modelMatrix*vec4(vertexNormal,0)).xyz; - fragPos = (modelMatrix*vec4(vertexPosition,1)).xyz; -} diff --git a/GrafikaProjekt/pliki/src/Box.cpp b/GrafikaProjekt/pliki/src/Box.cpp deleted file mode 100644 index 76ef601..0000000 --- a/GrafikaProjekt/pliki/src/Box.cpp +++ /dev/null @@ -1,104 +0,0 @@ - - -// dane 36 wierzcholkow i kolorow opisujace model pudelka -const float boxPositions[] = { - 0.25f, 0.25f, 0.75f, 1.0f, - 0.25f, -0.25f, 0.75f, 1.0f, - -0.25f, 0.25f, 0.75f, 1.0f, - - 0.25f, -0.25f, 0.75f, 1.0f, - -0.25f, -0.25f, 0.75f, 1.0f, - -0.25f, 0.25f, 0.75f, 1.0f, - - 0.25f, 0.25f, -0.75f, 1.0f, - -0.25f, 0.25f, -0.75f, 1.0f, - 0.25f, -0.25f, -0.75f, 1.0f, - - 0.25f, -0.25f, -0.75f, 1.0f, - -0.25f, 0.25f, -0.75f, 1.0f, - -0.25f, -0.25f, -0.75f, 1.0f, - - -0.25f, 0.25f, 0.75f, 1.0f, - -0.25f, -0.25f, 0.75f, 1.0f, - -0.25f, -0.25f, -0.75f, 1.0f, - - -0.25f, 0.25f, 0.75f, 1.0f, - -0.25f, -0.25f, -0.75f, 1.0f, - -0.25f, 0.25f, -0.75f, 1.0f, - - 0.25f, 0.25f, 0.75f, 1.0f, - 0.25f, -0.25f, -0.75f, 1.0f, - 0.25f, -0.25f, 0.75f, 1.0f, - - 0.25f, 0.25f, 0.75f, 1.0f, - 0.25f, 0.25f, -0.75f, 1.0f, - 0.25f, -0.25f, -0.75f, 1.0f, - - 0.25f, 0.25f, -0.75f, 1.0f, - 0.25f, 0.25f, 0.75f, 1.0f, - -0.25f, 0.25f, 0.75f, 1.0f, - - 0.25f, 0.25f, -0.75f, 1.0f, - -0.25f, 0.25f, 0.75f, 1.0f, - -0.25f, 0.25f, -0.75f, 1.0f, - - 0.25f, -0.25f, -0.75f, 1.0f, - -0.25f, -0.25f, 0.75f, 1.0f, - 0.25f, -0.25f, 0.75f, 1.0f, - - 0.25f, -0.25f, -0.75f, 1.0f, - -0.25f, -0.25f, -0.75f, 1.0f, - -0.25f, -0.25f, 0.75f, 1.0f, -}; - - -const float boxColors[] = { - 0.0f, 0.0f, 1.0f, 1.0f, - 0.0f, 0.0f, 1.0f, 1.0f, - 0.0f, 0.0f, 1.0f, 1.0f, - - 0.0f, 0.0f, 1.0f, 1.0f, - 0.0f, 0.0f, 1.0f, 1.0f, - 0.0f, 0.0f, 1.0f, 1.0f, - - 0.8f, 0.8f, 0.8f, 1.0f, - 0.8f, 0.8f, 0.8f, 1.0f, - 0.8f, 0.8f, 0.8f, 1.0f, - - 0.8f, 0.8f, 0.8f, 1.0f, - 0.8f, 0.8f, 0.8f, 1.0f, - 0.8f, 0.8f, 0.8f, 1.0f, - - 0.0f, 1.0f, 0.0f, 1.0f, - 0.0f, 1.0f, 0.0f, 1.0f, - 0.0f, 1.0f, 0.0f, 1.0f, - - 0.0f, 1.0f, 0.0f, 1.0f, - 0.0f, 1.0f, 0.0f, 1.0f, - 0.0f, 1.0f, 0.0f, 1.0f, - - 0.5f, 0.5f, 0.0f, 1.0f, - 0.5f, 0.5f, 0.0f, 1.0f, - 0.5f, 0.5f, 0.0f, 1.0f, - - 0.5f, 0.5f, 0.0f, 1.0f, - 0.5f, 0.5f, 0.0f, 1.0f, - 0.5f, 0.5f, 0.0f, 1.0f, - - 1.0f, 0.0f, 0.0f, 1.0f, - 1.0f, 0.0f, 0.0f, 1.0f, - 1.0f, 0.0f, 0.0f, 1.0f, - - 1.0f, 0.0f, 0.0f, 1.0f, - 1.0f, 0.0f, 0.0f, 1.0f, - 1.0f, 0.0f, 0.0f, 1.0f, - - 0.0f, 1.0f, 1.0f, 1.0f, - 0.0f, 1.0f, 1.0f, 1.0f, - 0.0f, 1.0f, 1.0f, 1.0f, - - 0.0f, 1.0f, 1.0f, 1.0f, - 0.0f, 1.0f, 1.0f, 1.0f, - 0.0f, 1.0f, 1.0f, 1.0f, - -}; \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/Camera.cpp b/GrafikaProjekt/pliki/src/Camera.cpp index 109a539..7155315 100644 --- a/GrafikaProjekt/pliki/src/Camera.cpp +++ b/GrafikaProjekt/pliki/src/Camera.cpp @@ -30,3 +30,11 @@ glm::mat4 Core::createViewMatrix( glm::vec3 position, glm::vec3 forward, glm::ve return cameraRotation * cameraTranslation; } + +glm::mat4 Core::createViewMatrixQuat(glm::vec3 position, glm::quat rotation) +{ + glm::mat4 cameraTranslation; + cameraTranslation[3] = glm::vec4(-position, 1.0f); + + return glm::mat4_cast(rotation) * cameraTranslation; +} diff --git a/GrafikaProjekt/pliki/src/Camera.h b/GrafikaProjekt/pliki/src/Camera.h index 688040b..e7df83e 100644 --- a/GrafikaProjekt/pliki/src/Camera.h +++ b/GrafikaProjekt/pliki/src/Camera.h @@ -1,6 +1,7 @@ #pragma once #include "glm.hpp" +#include "ext.hpp" namespace Core { @@ -11,4 +12,6 @@ namespace Core // up - wektor "w gore" kamery (jednostkowy) // up i forward musza byc ortogonalne! glm::mat4 createViewMatrix(glm::vec3 position, glm::vec3 forward, glm::vec3 up); + + glm::mat4 createViewMatrixQuat(glm::vec3 position, glm::quat rotation); } \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/Physics.cpp b/GrafikaProjekt/pliki/src/Physics.cpp deleted file mode 100644 index 457a088..0000000 --- a/GrafikaProjekt/pliki/src/Physics.cpp +++ /dev/null @@ -1,31 +0,0 @@ -#include "Physics.h" - -#define PX_RELEASE(x) if(x) { x->release(); x = NULL; } - -Physics::Physics(float gravity) -{ - foundation = PxCreateFoundation(PX_PHYSICS_VERSION, allocator, errorCallback); - - physics = PxCreatePhysics(PX_PHYSICS_VERSION, *foundation, PxTolerancesScale(), true); - - PxSceneDesc sceneDesc(physics->getTolerancesScale()); - sceneDesc.gravity = PxVec3(0.0f, -gravity, 0.0f); - dispatcher = PxDefaultCpuDispatcherCreate(2); - sceneDesc.cpuDispatcher = dispatcher; - sceneDesc.filterShader = PxDefaultSimulationFilterShader; - scene = physics->createScene(sceneDesc); -} - -Physics::~Physics() -{ - PX_RELEASE(scene); - PX_RELEASE(dispatcher); - PX_RELEASE(physics); - PX_RELEASE(foundation); -} - -void Physics::step(float dt) -{ - scene->simulate(dt); - scene->fetchResults(true); -} \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/Physics.h b/GrafikaProjekt/pliki/src/Physics.h deleted file mode 100644 index 753ecc5..0000000 --- a/GrafikaProjekt/pliki/src/Physics.h +++ /dev/null @@ -1,21 +0,0 @@ -#pragma once - -#include "PxPhysicsAPI.h" -using namespace physx; - -class Physics -{ -public: - Physics(float gravity); - virtual ~Physics(); - PxPhysics* physics = nullptr; - PxScene* scene = nullptr; - - void step(float dt); - -private: - PxDefaultAllocator allocator; - PxDefaultErrorCallback errorCallback; - PxFoundation* foundation = nullptr; - PxDefaultCpuDispatcher* dispatcher = nullptr; -}; \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/Render_Utils.cpp b/GrafikaProjekt/pliki/src/Render_Utils.cpp index 14394c3..b3d06fb 100644 --- a/GrafikaProjekt/pliki/src/Render_Utils.cpp +++ b/GrafikaProjekt/pliki/src/Render_Utils.cpp @@ -4,8 +4,9 @@ #include "glew.h" #include "freeglut.h" - - +#include +#include +#include void Core::RenderContext::initFromOBJ(obj::Model& model) @@ -18,13 +19,8 @@ void Core::RenderContext::initFromOBJ(obj::Model& model) unsigned int vertexTexBufferSize = sizeof(float) * model.texCoord.size(); size = model.faces["default"].size(); - unsigned int vertexElementBufferSize = sizeof(unsigned int) * size; - + unsigned int vertexElementBufferSize = sizeof(unsigned short) * size; - std::vector indices; - for (unsigned short index : model.faces["default"]) { - indices.push_back(index); - } glGenVertexArrays(1, &vertexArray); glBindVertexArray(vertexArray); @@ -32,7 +28,7 @@ void Core::RenderContext::initFromOBJ(obj::Model& model) glGenBuffers(1, &vertexIndexBuffer); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vertexIndexBuffer); - glBufferData(GL_ELEMENT_ARRAY_BUFFER, vertexElementBufferSize, &indices[0], GL_STATIC_DRAW); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, vertexElementBufferSize, &model.faces["default"][0], GL_STATIC_DRAW); glGenBuffers(1, &vertexBuffer); glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer); @@ -40,7 +36,7 @@ void Core::RenderContext::initFromOBJ(obj::Model& model) glEnableVertexAttribArray(0); glEnableVertexAttribArray(1); glEnableVertexAttribArray(2); - + glBufferData(GL_ARRAY_BUFFER, vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize, NULL, GL_STATIC_DRAW); glBufferSubData(GL_ARRAY_BUFFER, 0, vertexDataBufferSize, &model.vertex[0]); @@ -54,7 +50,8 @@ void Core::RenderContext::initFromOBJ(obj::Model& model) glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, (void*)(vertexNormalBufferSize + vertexDataBufferSize)); } -void Core::RenderContext::initFromAssimpMesh(aiMesh* mesh){ + +void Core::RenderContext::initFromAssimpMesh(aiMesh* mesh) { vertexArray = 0; vertexBuffer = 0; vertexIndexBuffer = 0; @@ -64,7 +61,7 @@ void Core::RenderContext::initFromAssimpMesh(aiMesh* mesh){ //tex coord must be converted to 2d vecs for (unsigned int i = 0; i < mesh->mNumVertices; i++) { - if (mesh->mTextureCoords[0]!=nullptr) { + if (mesh->mTextureCoords[0] != nullptr) { textureCoord.push_back(mesh->mTextureCoords[0][i].x); textureCoord.push_back(mesh->mTextureCoords[0][i].y); } @@ -130,20 +127,6 @@ void Core::RenderContext::initFromAssimpMesh(aiMesh* mesh){ } -void Core::RenderContext::render() -{ - - glBindVertexArray(this->vertexArray); - glDrawElements( - GL_TRIANGLES, // mode - this->size, // count - GL_UNSIGNED_INT, // type - (void*)0 // element array buffer offset - ); - glBindVertexArray(0); -} - - void Core::DrawVertexArray(const float * vertexArray, int numVertices, int elementSize ) { glVertexAttribPointer(0, elementSize, GL_FLOAT, false, 0, vertexArray); @@ -172,69 +155,15 @@ void Core::DrawVertexArray( const VertexData & data ) glDrawArrays(GL_TRIANGLES, 0, data.NumVertices); } -void Core::DiffuseMaterial::init_data() { - glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); - Core::SetActiveTexture(texture, "color_texture", program, 0); -} - -void Core::DiffuseSpecularMaterial::init_data() { - glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); - Core::SetActiveTexture(texture, "color_texture", program, 0); - Core::SetActiveTexture(textureSpecular, "specular_texture", program, 1); -} - - - -void Core::RayContext::render() +void Core::DrawContext(Core::RenderContext& context) { - glBindVertexArray(vertexArray); - glDrawArrays( - GL_LINES,// mode - 0, //start - 3 * 7 * 2 // count - ); - glBindVertexArray(0); + glBindVertexArray(context.vertexArray); + glDrawElements( + GL_TRIANGLES, // mode + context.size, // count + GL_UNSIGNED_INT, // type + (void*)0 // element array buffer offset + ); + glBindVertexArray(0); } - - -void Core::initRay(RayContext& rayContext) { - rayContext.size = 2; - glGenVertexArrays(1, &rayContext.vertexArray); - glBindVertexArray(rayContext.vertexArray); - - glGenBuffers(1, &rayContext.vertexBuffer); - glBindBuffer(GL_ARRAY_BUFFER, rayContext.vertexBuffer); - - glBufferData(GL_ARRAY_BUFFER, 3 * 7 * 2 * sizeof(float), NULL, GL_DYNAMIC_DRAW); - - glEnableVertexAttribArray(0); - glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)(0)); - glBindVertexArray(0); -} -void Core::updateRayPos(RayContext& rayContext,std::vector ray) { - glBindVertexArray(rayContext.vertexArray); - std::vector keyPoints; - float offset = 4.f; - float scale = 0.2f; - float rayEnd = 50.f; - keyPoints.push_back(ray[0] + ray[1] * offset); - keyPoints.push_back(ray[0] + ray[1] * rayEnd); - - keyPoints.push_back(ray[0] + ray[1] * offset + scale * glm::vec3(1.f, 1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * offset - scale * glm::vec3(1.f, 1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * offset + scale * glm::vec3(1.f, -1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * offset - scale * glm::vec3(1.f, -1.f, 0.f)); - - keyPoints.push_back(ray[0] + ray[1] * offset + scale * glm::vec3(1.f, 1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * rayEnd * scale); - keyPoints.push_back(ray[0] + ray[1] * offset - scale * glm::vec3(1.f, 1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * rayEnd * scale); - keyPoints.push_back(ray[0] + ray[1] * offset + scale * glm::vec3(1.f, -1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * rayEnd * scale); - keyPoints.push_back(ray[0] + ray[1] * offset - scale * glm::vec3(1.f, -1.f, 0.f)); - keyPoints.push_back(ray[0] + ray[1] * rayEnd * scale); - glBindBuffer(GL_ARRAY_BUFFER, rayContext.vertexBuffer); - glBufferSubData(GL_ARRAY_BUFFER, 0, keyPoints.size()*3 * sizeof(float), &keyPoints[0]); - glBindVertexArray(0); -} \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/Render_Utils.h b/GrafikaProjekt/pliki/src/Render_Utils.h index 0c5e219..052008d 100644 --- a/GrafikaProjekt/pliki/src/Render_Utils.h +++ b/GrafikaProjekt/pliki/src/Render_Utils.h @@ -1,63 +1,25 @@ #pragma once #include "glm.hpp" -#include "ext.hpp" #include "glew.h" #include "objload.h" #include #include #include -#include "Texture.h" #define BUFFER_OFFSET(i) ((char *)NULL + (i)) namespace Core { - static inline glm::mat4 mat4_cast(const aiMatrix4x4& m) { return glm::transpose(glm::make_mat4(&m.a1)); } - - struct Material { - GLuint program; - virtual void init_data() = 0; - }; - - struct DiffuseMaterial : Core::Material { - GLuint texture; - glm::vec3 lightDir; - void init_data(); - - }; - - struct DiffuseSpecularMaterial : Core::Material { - GLuint texture; - GLuint textureSpecular; - glm::vec3 lightDir; - void init_data(); - - }; - struct RenderContext { - GLuint vertexArray; GLuint vertexBuffer; GLuint vertexIndexBuffer; - Material* material; int size = 0; void initFromOBJ(obj::Model& model); void initFromAssimpMesh(aiMesh* mesh); - - void render(); - }; - struct RayContext : RenderContext { - - void render(); - }; - - struct Node { - std::vector renderContexts; - glm::mat4 matrix; - int parent; }; // vertexArray - jednowymiarowa tablica zawierajaca wartosci opisujace pozycje kolejnych wierzcholkow w jednym ciagu (x1, y1, z1, w1, x2, y2, z2, w2, ...) @@ -106,12 +68,5 @@ namespace Core */ void DrawVertexArray(const VertexData & data); - - - void initRay(RayContext& rayContext); - - void updateRayPos(RayContext& rayContext, std::vector keyPoints); - - //void DrawContext(Core::RayContext& rayContext); - + void DrawContext(RenderContext& context); } \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/SOIL/SOIL.c b/GrafikaProjekt/pliki/src/SOIL/SOIL.c new file mode 100644 index 0000000..1ee4daf --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/SOIL.c @@ -0,0 +1,2024 @@ +/* + Jonathan Dummer + 2007-07-26-10.36 + + Simple OpenGL Image Library + + Public Domain + using Sean Barret's stb_image as a base + + Thanks to: + * Sean Barret - for the awesome stb_image + * Dan Venkitachalam - for finding some non-compliant DDS files, and patching some explicit casts + * everybody at gamedev.net +*/ + +#define SOIL_CHECK_FOR_GL_ERRORS 0 + +#ifdef WIN32 + #define WIN32_LEAN_AND_MEAN + #include + #include + #include +#elif defined(__APPLE__) || defined(__APPLE_CC__) + /* I can't test this Apple stuff! */ + #include + #include + #define APIENTRY +#else + #include + #include +#endif + +#include "SOIL.h" +#include "stb_image_aug.h" +#include "image_helper.h" +#include "image_DXT.h" + +#include +#include + +/* error reporting */ +char *result_string_pointer = "SOIL initialized"; + +/* for loading cube maps */ +enum{ + SOIL_CAPABILITY_UNKNOWN = -1, + SOIL_CAPABILITY_NONE = 0, + SOIL_CAPABILITY_PRESENT = 1 +}; +static int has_cubemap_capability = SOIL_CAPABILITY_UNKNOWN; +int query_cubemap_capability( void ); +#define SOIL_TEXTURE_WRAP_R 0x8072 +#define SOIL_CLAMP_TO_EDGE 0x812F +#define SOIL_NORMAL_MAP 0x8511 +#define SOIL_REFLECTION_MAP 0x8512 +#define SOIL_TEXTURE_CUBE_MAP 0x8513 +#define SOIL_TEXTURE_BINDING_CUBE_MAP 0x8514 +#define SOIL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515 +#define SOIL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516 +#define SOIL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517 +#define SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518 +#define SOIL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519 +#define SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A +#define SOIL_PROXY_TEXTURE_CUBE_MAP 0x851B +#define SOIL_MAX_CUBE_MAP_TEXTURE_SIZE 0x851C +/* for non-power-of-two texture */ +static int has_NPOT_capability = SOIL_CAPABILITY_UNKNOWN; +int query_NPOT_capability( void ); +/* for texture rectangles */ +static int has_tex_rectangle_capability = SOIL_CAPABILITY_UNKNOWN; +int query_tex_rectangle_capability( void ); +#define SOIL_TEXTURE_RECTANGLE_ARB 0x84F5 +#define SOIL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8 +/* for using DXT compression */ +static int has_DXT_capability = SOIL_CAPABILITY_UNKNOWN; +int query_DXT_capability( void ); +#define SOIL_RGB_S3TC_DXT1 0x83F0 +#define SOIL_RGBA_S3TC_DXT1 0x83F1 +#define SOIL_RGBA_S3TC_DXT3 0x83F2 +#define SOIL_RGBA_S3TC_DXT5 0x83F3 +typedef void (APIENTRY * P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid * data); +P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC soilGlCompressedTexImage2D = NULL; +unsigned int SOIL_direct_load_DDS( + const char *filename, + unsigned int reuse_texture_ID, + int flags, + int loading_as_cubemap ); +unsigned int SOIL_direct_load_DDS_from_memory( + const unsigned char *const buffer, + int buffer_length, + unsigned int reuse_texture_ID, + int flags, + int loading_as_cubemap ); +/* other functions */ +unsigned int + SOIL_internal_create_OGL_texture + ( + const unsigned char *const data, + int width, int height, int channels, + unsigned int reuse_texture_ID, + unsigned int flags, + unsigned int opengl_texture_type, + unsigned int opengl_texture_target, + unsigned int texture_check_size_enum + ); + +/* and the code magic begins here [8^) */ +unsigned int + SOIL_load_OGL_texture + ( + const char *filename, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels; + unsigned int tex_id; + /* does the user want direct uploading of the image as a DDS file? */ + if( flags & SOIL_FLAG_DDS_LOAD_DIRECT ) + { + /* 1st try direct loading of the image as a DDS file + note: direct uploading will only load what is in the + DDS file, no MIPmaps will be generated, the image will + not be flipped, etc. */ + tex_id = SOIL_direct_load_DDS( filename, reuse_texture_ID, flags, 0 ); + if( tex_id ) + { + /* hey, it worked!! */ + return tex_id; + } + } + /* try to load the image */ + img = SOIL_load_image( filename, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* OK, make it a texture! */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + reuse_texture_ID, flags, + GL_TEXTURE_2D, GL_TEXTURE_2D, + GL_MAX_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_load_OGL_HDR_texture + ( + const char *filename, + int fake_HDR_format, + int rescale_to_max, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels; + unsigned int tex_id; + /* no direct uploading of the image as a DDS file */ + /* error check */ + if( (fake_HDR_format != SOIL_HDR_RGBE) && + (fake_HDR_format != SOIL_HDR_RGBdivA) && + (fake_HDR_format != SOIL_HDR_RGBdivA2) ) + { + result_string_pointer = "Invalid fake HDR format specified"; + return 0; + } + /* try to load the image (only the HDR type) */ + img = stbi_hdr_load_rgbe( filename, &width, &height, &channels, 4 ); + /* channels holds the original number of channels, which may have been forced */ + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* the load worked, do I need to convert it? */ + if( fake_HDR_format == SOIL_HDR_RGBdivA ) + { + RGBE_to_RGBdivA( img, width, height, rescale_to_max ); + } else if( fake_HDR_format == SOIL_HDR_RGBdivA2 ) + { + RGBE_to_RGBdivA2( img, width, height, rescale_to_max ); + } + /* OK, make it a texture! */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + reuse_texture_ID, flags, + GL_TEXTURE_2D, GL_TEXTURE_2D, + GL_MAX_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_load_OGL_texture_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels; + unsigned int tex_id; + /* does the user want direct uploading of the image as a DDS file? */ + if( flags & SOIL_FLAG_DDS_LOAD_DIRECT ) + { + /* 1st try direct loading of the image as a DDS file + note: direct uploading will only load what is in the + DDS file, no MIPmaps will be generated, the image will + not be flipped, etc. */ + tex_id = SOIL_direct_load_DDS_from_memory( + buffer, buffer_length, + reuse_texture_ID, flags, 0 ); + if( tex_id ) + { + /* hey, it worked!! */ + return tex_id; + } + } + /* try to load the image */ + img = SOIL_load_image_from_memory( + buffer, buffer_length, + &width, &height, &channels, + force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* OK, make it a texture! */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + reuse_texture_ID, flags, + GL_TEXTURE_2D, GL_TEXTURE_2D, + GL_MAX_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_load_OGL_cubemap + ( + const char *x_pos_file, + const char *x_neg_file, + const char *y_pos_file, + const char *y_neg_file, + const char *z_pos_file, + const char *z_neg_file, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels; + unsigned int tex_id; + /* error checking */ + if( (x_pos_file == NULL) || + (x_neg_file == NULL) || + (y_pos_file == NULL) || + (y_neg_file == NULL) || + (z_pos_file == NULL) || + (z_neg_file == NULL) ) + { + result_string_pointer = "Invalid cube map files list"; + return 0; + } + /* capability checking */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + result_string_pointer = "No cube map capability present"; + return 0; + } + /* 1st face: try to load the image */ + img = SOIL_load_image( x_pos_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, and create a texture ID if necessary */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + reuse_texture_ID, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_X, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image( x_neg_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_X, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image( y_pos_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_Y, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image( y_neg_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Y, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image( z_pos_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_Z, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image( z_neg_file, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Z, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_load_OGL_cubemap_from_memory + ( + const unsigned char *const x_pos_buffer, + int x_pos_buffer_length, + const unsigned char *const x_neg_buffer, + int x_neg_buffer_length, + const unsigned char *const y_pos_buffer, + int y_pos_buffer_length, + const unsigned char *const y_neg_buffer, + int y_neg_buffer_length, + const unsigned char *const z_pos_buffer, + int z_pos_buffer_length, + const unsigned char *const z_neg_buffer, + int z_neg_buffer_length, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels; + unsigned int tex_id; + /* error checking */ + if( (x_pos_buffer == NULL) || + (x_neg_buffer == NULL) || + (y_pos_buffer == NULL) || + (y_neg_buffer == NULL) || + (z_pos_buffer == NULL) || + (z_neg_buffer == NULL) ) + { + result_string_pointer = "Invalid cube map buffers list"; + return 0; + } + /* capability checking */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + result_string_pointer = "No cube map capability present"; + return 0; + } + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + x_pos_buffer, x_pos_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, and create a texture ID if necessary */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + reuse_texture_ID, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_X, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + x_neg_buffer, x_neg_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_X, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + y_pos_buffer, y_pos_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_Y, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + y_neg_buffer, y_neg_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Y, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + z_pos_buffer, z_pos_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_POSITIVE_Z, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* continue? */ + if( tex_id != 0 ) + { + /* 1st face: try to load the image */ + img = SOIL_load_image_from_memory( + z_neg_buffer, z_neg_buffer_length, + &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* upload the texture, but reuse the assigned texture ID */ + tex_id = SOIL_internal_create_OGL_texture( + img, width, height, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Z, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + /* and nuke the image data */ + SOIL_free_image_data( img ); + } + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_load_OGL_single_cubemap + ( + const char *filename, + const char face_order[6], + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels, i; + unsigned int tex_id = 0; + /* error checking */ + if( filename == NULL ) + { + result_string_pointer = "Invalid single cube map file name"; + return 0; + } + /* does the user want direct uploading of the image as a DDS file? */ + if( flags & SOIL_FLAG_DDS_LOAD_DIRECT ) + { + /* 1st try direct loading of the image as a DDS file + note: direct uploading will only load what is in the + DDS file, no MIPmaps will be generated, the image will + not be flipped, etc. */ + tex_id = SOIL_direct_load_DDS( filename, reuse_texture_ID, flags, 1 ); + if( tex_id ) + { + /* hey, it worked!! */ + return tex_id; + } + } + /* face order checking */ + for( i = 0; i < 6; ++i ) + { + if( (face_order[i] != 'N') && + (face_order[i] != 'S') && + (face_order[i] != 'W') && + (face_order[i] != 'E') && + (face_order[i] != 'U') && + (face_order[i] != 'D') ) + { + result_string_pointer = "Invalid single cube map face order"; + return 0; + }; + } + /* capability checking */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + result_string_pointer = "No cube map capability present"; + return 0; + } + /* 1st off, try to load the full image */ + img = SOIL_load_image( filename, &width, &height, &channels, force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* now, does this image have the right dimensions? */ + if( (width != 6*height) && + (6*width != height) ) + { + SOIL_free_image_data( img ); + result_string_pointer = "Single cubemap image must have a 6:1 ratio"; + return 0; + } + /* try the image split and create */ + tex_id = SOIL_create_OGL_single_cubemap( + img, width, height, channels, + face_order, reuse_texture_ID, flags + ); + /* nuke the temporary image data and return the texture handle */ + SOIL_free_image_data( img ); + return tex_id; +} + +unsigned int + SOIL_load_OGL_single_cubemap_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + const char face_order[6], + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* img; + int width, height, channels, i; + unsigned int tex_id = 0; + /* error checking */ + if( buffer == NULL ) + { + result_string_pointer = "Invalid single cube map buffer"; + return 0; + } + /* does the user want direct uploading of the image as a DDS file? */ + if( flags & SOIL_FLAG_DDS_LOAD_DIRECT ) + { + /* 1st try direct loading of the image as a DDS file + note: direct uploading will only load what is in the + DDS file, no MIPmaps will be generated, the image will + not be flipped, etc. */ + tex_id = SOIL_direct_load_DDS_from_memory( + buffer, buffer_length, + reuse_texture_ID, flags, 1 ); + if( tex_id ) + { + /* hey, it worked!! */ + return tex_id; + } + } + /* face order checking */ + for( i = 0; i < 6; ++i ) + { + if( (face_order[i] != 'N') && + (face_order[i] != 'S') && + (face_order[i] != 'W') && + (face_order[i] != 'E') && + (face_order[i] != 'U') && + (face_order[i] != 'D') ) + { + result_string_pointer = "Invalid single cube map face order"; + return 0; + }; + } + /* capability checking */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + result_string_pointer = "No cube map capability present"; + return 0; + } + /* 1st off, try to load the full image */ + img = SOIL_load_image_from_memory( + buffer, buffer_length, + &width, &height, &channels, + force_channels ); + /* channels holds the original number of channels, which may have been forced */ + if( (force_channels >= 1) && (force_channels <= 4) ) + { + channels = force_channels; + } + if( NULL == img ) + { + /* image loading failed */ + result_string_pointer = stbi_failure_reason(); + return 0; + } + /* now, does this image have the right dimensions? */ + if( (width != 6*height) && + (6*width != height) ) + { + SOIL_free_image_data( img ); + result_string_pointer = "Single cubemap image must have a 6:1 ratio"; + return 0; + } + /* try the image split and create */ + tex_id = SOIL_create_OGL_single_cubemap( + img, width, height, channels, + face_order, reuse_texture_ID, flags + ); + /* nuke the temporary image data and return the texture handle */ + SOIL_free_image_data( img ); + return tex_id; +} + +unsigned int + SOIL_create_OGL_single_cubemap + ( + const unsigned char *const data, + int width, int height, int channels, + const char face_order[6], + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* variables */ + unsigned char* sub_img; + int dw, dh, sz, i; + unsigned int tex_id; + /* error checking */ + if( data == NULL ) + { + result_string_pointer = "Invalid single cube map image data"; + return 0; + } + /* face order checking */ + for( i = 0; i < 6; ++i ) + { + if( (face_order[i] != 'N') && + (face_order[i] != 'S') && + (face_order[i] != 'W') && + (face_order[i] != 'E') && + (face_order[i] != 'U') && + (face_order[i] != 'D') ) + { + result_string_pointer = "Invalid single cube map face order"; + return 0; + }; + } + /* capability checking */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + result_string_pointer = "No cube map capability present"; + return 0; + } + /* now, does this image have the right dimensions? */ + if( (width != 6*height) && + (6*width != height) ) + { + result_string_pointer = "Single cubemap image must have a 6:1 ratio"; + return 0; + } + /* which way am I stepping? */ + if( width > height ) + { + dw = height; + dh = 0; + } else + { + dw = 0; + dh = width; + } + sz = dw+dh; + sub_img = (unsigned char *)malloc( sz*sz*channels ); + /* do the splitting and uploading */ + tex_id = reuse_texture_ID; + for( i = 0; i < 6; ++i ) + { + int x, y, idx = 0; + unsigned int cubemap_target = 0; + /* copy in the sub-image */ + for( y = i*dh; y < i*dh+sz; ++y ) + { + for( x = i*dw*channels; x < (i*dw+sz)*channels; ++x ) + { + sub_img[idx++] = data[y*width*channels+x]; + } + } + /* what is my texture target? + remember, this coordinate system is + LHS if viewed from inside the cube! */ + switch( face_order[i] ) + { + case 'N': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_POSITIVE_Z; + break; + case 'S': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Z; + break; + case 'W': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_NEGATIVE_X; + break; + case 'E': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_POSITIVE_X; + break; + case 'U': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_POSITIVE_Y; + break; + case 'D': + cubemap_target = SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Y; + break; + } + /* upload it as a texture */ + tex_id = SOIL_internal_create_OGL_texture( + sub_img, sz, sz, channels, + tex_id, flags, + SOIL_TEXTURE_CUBE_MAP, + cubemap_target, + SOIL_MAX_CUBE_MAP_TEXTURE_SIZE ); + } + /* and nuke the image and sub-image data */ + SOIL_free_image_data( sub_img ); + /* and return the handle, such as it is */ + return tex_id; +} + +unsigned int + SOIL_create_OGL_texture + ( + const unsigned char *const data, + int width, int height, int channels, + unsigned int reuse_texture_ID, + unsigned int flags + ) +{ + /* wrapper function for 2D textures */ + return SOIL_internal_create_OGL_texture( + data, width, height, channels, + reuse_texture_ID, flags, + GL_TEXTURE_2D, GL_TEXTURE_2D, + GL_MAX_TEXTURE_SIZE ); +} + +#if SOIL_CHECK_FOR_GL_ERRORS +void check_for_GL_errors( const char *calling_location ) +{ + /* check for errors */ + GLenum err_code = glGetError(); + while( GL_NO_ERROR != err_code ) + { + printf( "OpenGL Error @ %s: %i", calling_location, err_code ); + err_code = glGetError(); + } +} +#else +void check_for_GL_errors( const char *calling_location ) +{ + /* no check for errors */ +} +#endif + +unsigned int + SOIL_internal_create_OGL_texture + ( + const unsigned char *const data, + int width, int height, int channels, + unsigned int reuse_texture_ID, + unsigned int flags, + unsigned int opengl_texture_type, + unsigned int opengl_texture_target, + unsigned int texture_check_size_enum + ) +{ + /* variables */ + unsigned char* img; + unsigned int tex_id; + unsigned int internal_texture_format = 0, original_texture_format = 0; + int DXT_mode = SOIL_CAPABILITY_UNKNOWN; + int max_supported_size; + /* If the user wants to use the texture rectangle I kill a few flags */ + if( flags & SOIL_FLAG_TEXTURE_RECTANGLE ) + { + /* well, the user asked for it, can we do that? */ + if( query_tex_rectangle_capability() == SOIL_CAPABILITY_PRESENT ) + { + /* only allow this if the user in _NOT_ trying to do a cubemap! */ + if( opengl_texture_type == GL_TEXTURE_2D ) + { + /* clean out the flags that cannot be used with texture rectangles */ + flags &= ~( + SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | + SOIL_FLAG_TEXTURE_REPEATS + ); + /* and change my target */ + opengl_texture_target = SOIL_TEXTURE_RECTANGLE_ARB; + opengl_texture_type = SOIL_TEXTURE_RECTANGLE_ARB; + } else + { + /* not allowed for any other uses (yes, I'm looking at you, cubemaps!) */ + flags &= ~SOIL_FLAG_TEXTURE_RECTANGLE; + } + + } else + { + /* can't do it, and that is a breakable offense (uv coords use pixels instead of [0,1]!) */ + result_string_pointer = "Texture Rectangle extension unsupported"; + return 0; + } + } + /* create a copy the image data */ + img = (unsigned char*)malloc( width*height*channels ); + memcpy( img, data, width*height*channels ); + /* does the user want me to invert the image? */ + if( flags & SOIL_FLAG_INVERT_Y ) + { + int i, j; + for( j = 0; j*2 < height; ++j ) + { + int index1 = j * width * channels; + int index2 = (height - 1 - j) * width * channels; + for( i = width * channels; i > 0; --i ) + { + unsigned char temp = img[index1]; + img[index1] = img[index2]; + img[index2] = temp; + ++index1; + ++index2; + } + } + } + /* does the user want me to scale the colors into the NTSC safe RGB range? */ + if( flags & SOIL_FLAG_NTSC_SAFE_RGB ) + { + scale_image_RGB_to_NTSC_safe( img, width, height, channels ); + } + /* does the user want me to convert from straight to pre-multiplied alpha? + (and do we even _have_ alpha?) */ + if( flags & SOIL_FLAG_MULTIPLY_ALPHA ) + { + int i; + switch( channels ) + { + case 2: + for( i = 0; i < 2*width*height; i += 2 ) + { + img[i] = (img[i] * img[i+1] + 128) >> 8; + } + break; + case 4: + for( i = 0; i < 4*width*height; i += 4 ) + { + img[i+0] = (img[i+0] * img[i+3] + 128) >> 8; + img[i+1] = (img[i+1] * img[i+3] + 128) >> 8; + img[i+2] = (img[i+2] * img[i+3] + 128) >> 8; + } + break; + default: + /* no other number of channels contains alpha data */ + break; + } + } + /* if the user can't support NPOT textures, make sure we force the POT option */ + if( (query_NPOT_capability() == SOIL_CAPABILITY_NONE) && + !(flags & SOIL_FLAG_TEXTURE_RECTANGLE) ) + { + /* add in the POT flag */ + flags |= SOIL_FLAG_POWER_OF_TWO; + } + /* how large of a texture can this OpenGL implementation handle? */ + /* texture_check_size_enum will be GL_MAX_TEXTURE_SIZE or SOIL_MAX_CUBE_MAP_TEXTURE_SIZE */ + glGetIntegerv( texture_check_size_enum, &max_supported_size ); + /* do I need to make it a power of 2? */ + if( + (flags & SOIL_FLAG_POWER_OF_TWO) || /* user asked for it */ + (flags & SOIL_FLAG_MIPMAPS) || /* need it for the MIP-maps */ + (width > max_supported_size) || /* it's too big, (make sure it's */ + (height > max_supported_size) ) /* 2^n for later down-sampling) */ + { + int new_width = 1; + int new_height = 1; + while( new_width < width ) + { + new_width *= 2; + } + while( new_height < height ) + { + new_height *= 2; + } + /* still? */ + if( (new_width != width) || (new_height != height) ) + { + /* yep, resize */ + unsigned char *resampled = (unsigned char*)malloc( channels*new_width*new_height ); + up_scale_image( + img, width, height, channels, + resampled, new_width, new_height ); + /* OJO this is for debug only! */ + /* + SOIL_save_image( "\\showme.bmp", SOIL_SAVE_TYPE_BMP, + new_width, new_height, channels, + resampled ); + */ + /* nuke the old guy, then point it at the new guy */ + SOIL_free_image_data( img ); + img = resampled; + width = new_width; + height = new_height; + } + } + /* now, if it is too large... */ + if( (width > max_supported_size) || (height > max_supported_size) ) + { + /* I've already made it a power of two, so simply use the MIPmapping + code to reduce its size to the allowable maximum. */ + unsigned char *resampled; + int reduce_block_x = 1, reduce_block_y = 1; + int new_width, new_height; + if( width > max_supported_size ) + { + reduce_block_x = width / max_supported_size; + } + if( height > max_supported_size ) + { + reduce_block_y = height / max_supported_size; + } + new_width = width / reduce_block_x; + new_height = height / reduce_block_y; + resampled = (unsigned char*)malloc( channels*new_width*new_height ); + /* perform the actual reduction */ + mipmap_image( img, width, height, channels, + resampled, reduce_block_x, reduce_block_y ); + /* nuke the old guy, then point it at the new guy */ + SOIL_free_image_data( img ); + img = resampled; + width = new_width; + height = new_height; + } + /* does the user want us to use YCoCg color space? */ + if( flags & SOIL_FLAG_CoCg_Y ) + { + /* this will only work with RGB and RGBA images */ + convert_RGB_to_YCoCg( img, width, height, channels ); + /* + save_image_as_DDS( "CoCg_Y.dds", width, height, channels, img ); + */ + } + /* create the OpenGL texture ID handle + (note: allowing a forced texture ID lets me reload a texture) */ + tex_id = reuse_texture_ID; + if( tex_id == 0 ) + { + glGenTextures( 1, &tex_id ); + } + check_for_GL_errors( "glGenTextures" ); + /* Note: sometimes glGenTextures fails (usually no OpenGL context) */ + if( tex_id ) + { + /* and what type am I using as the internal texture format? */ + switch( channels ) + { + case 1: + original_texture_format = GL_LUMINANCE; + break; + case 2: + original_texture_format = GL_LUMINANCE_ALPHA; + break; + case 3: + original_texture_format = GL_RGB; + break; + case 4: + original_texture_format = GL_RGBA; + break; + } + internal_texture_format = original_texture_format; + /* does the user want me to, and can I, save as DXT? */ + if( flags & SOIL_FLAG_COMPRESS_TO_DXT ) + { + DXT_mode = query_DXT_capability(); + if( DXT_mode == SOIL_CAPABILITY_PRESENT ) + { + /* I can use DXT, whether I compress it or OpenGL does */ + if( (channels & 1) == 1 ) + { + /* 1 or 3 channels = DXT1 */ + internal_texture_format = SOIL_RGB_S3TC_DXT1; + } else + { + /* 2 or 4 channels = DXT5 */ + internal_texture_format = SOIL_RGBA_S3TC_DXT5; + } + } + } + /* bind an OpenGL texture ID */ + glBindTexture( opengl_texture_type, tex_id ); + check_for_GL_errors( "glBindTexture" ); + /* upload the main image */ + if( DXT_mode == SOIL_CAPABILITY_PRESENT ) + { + /* user wants me to do the DXT conversion! */ + int DDS_size; + unsigned char *DDS_data = NULL; + if( (channels & 1) == 1 ) + { + /* RGB, use DXT1 */ + DDS_data = convert_image_to_DXT1( img, width, height, channels, &DDS_size ); + } else + { + /* RGBA, use DXT5 */ + DDS_data = convert_image_to_DXT5( img, width, height, channels, &DDS_size ); + } + if( DDS_data ) + { + soilGlCompressedTexImage2D( + opengl_texture_target, 0, + internal_texture_format, width, height, 0, + DDS_size, DDS_data ); + check_for_GL_errors( "glCompressedTexImage2D" ); + SOIL_free_image_data( DDS_data ); + /* printf( "Internal DXT compressor\n" ); */ + } else + { + /* my compression failed, try the OpenGL driver's version */ + glTexImage2D( + opengl_texture_target, 0, + internal_texture_format, width, height, 0, + original_texture_format, GL_UNSIGNED_BYTE, img ); + check_for_GL_errors( "glTexImage2D" ); + /* printf( "OpenGL DXT compressor\n" ); */ + } + } else + { + /* user want OpenGL to do all the work! */ + glTexImage2D( + opengl_texture_target, 0, + internal_texture_format, width, height, 0, + original_texture_format, GL_UNSIGNED_BYTE, img ); + check_for_GL_errors( "glTexImage2D" ); + /*printf( "OpenGL DXT compressor\n" ); */ + } + /* are any MIPmaps desired? */ + if( flags & SOIL_FLAG_MIPMAPS ) + { + int MIPlevel = 1; + int MIPwidth = (width+1) / 2; + int MIPheight = (height+1) / 2; + unsigned char *resampled = (unsigned char*)malloc( channels*MIPwidth*MIPheight ); + while( ((1< 0; --i ) + { + unsigned char temp = pixel_data[index1]; + pixel_data[index1] = pixel_data[index2]; + pixel_data[index2] = temp; + ++index1; + ++index2; + } + } + + /* save the image */ + save_result = SOIL_save_image( filename, image_type, width, height, 3, pixel_data); + + /* And free the memory */ + SOIL_free_image_data( pixel_data ); + return save_result; +} + +unsigned char* + SOIL_load_image + ( + const char *filename, + int *width, int *height, int *channels, + int force_channels + ) +{ + unsigned char *result = stbi_load( filename, + width, height, channels, force_channels ); + if( result == NULL ) + { + result_string_pointer = stbi_failure_reason(); + } else + { + result_string_pointer = "Image loaded"; + } + return result; +} + +unsigned char* + SOIL_load_image_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + int *width, int *height, int *channels, + int force_channels + ) +{ + unsigned char *result = stbi_load_from_memory( + buffer, buffer_length, + width, height, channels, + force_channels ); + if( result == NULL ) + { + result_string_pointer = stbi_failure_reason(); + } else + { + result_string_pointer = "Image loaded from memory"; + } + return result; +} + +int + SOIL_save_image + ( + const char *filename, + int image_type, + int width, int height, int channels, + const unsigned char *const data + ) +{ + int save_result; + + /* error check */ + if( (width < 1) || (height < 1) || + (channels < 1) || (channels > 4) || + (data == NULL) || + (filename == NULL) ) + { + return 0; + } + if( image_type == SOIL_SAVE_TYPE_BMP ) + { + save_result = stbi_write_bmp( filename, + width, height, channels, (void*)data ); + } else + if( image_type == SOIL_SAVE_TYPE_TGA ) + { + save_result = stbi_write_tga( filename, + width, height, channels, (void*)data ); + } else + if( image_type == SOIL_SAVE_TYPE_DDS ) + { + save_result = save_image_as_DDS( filename, + width, height, channels, (const unsigned char *const)data ); + } else + { + save_result = 0; + } + if( save_result == 0 ) + { + result_string_pointer = "Saving the image failed"; + } else + { + result_string_pointer = "Image saved"; + } + return save_result; +} + +void + SOIL_free_image_data + ( + unsigned char *img_data + ) +{ + free( (void*)img_data ); +} + +const char* + SOIL_last_result + ( + void + ) +{ + return result_string_pointer; +} + +unsigned int SOIL_direct_load_DDS_from_memory( + const unsigned char *const buffer, + int buffer_length, + unsigned int reuse_texture_ID, + int flags, + int loading_as_cubemap ) +{ + /* variables */ + DDS_header header; + unsigned int buffer_index = 0; + unsigned int tex_ID = 0; + /* file reading variables */ + unsigned int S3TC_type = 0; + unsigned char *DDS_data; + unsigned int DDS_main_size; + unsigned int DDS_full_size; + unsigned int width, height; + int mipmaps, cubemap, uncompressed, block_size = 16; + unsigned int flag; + unsigned int cf_target, ogl_target_start, ogl_target_end; + unsigned int opengl_texture_type; + int i; + /* 1st off, does the filename even exist? */ + if( NULL == buffer ) + { + /* we can't do it! */ + result_string_pointer = "NULL buffer"; + return 0; + } + if( buffer_length < sizeof( DDS_header ) ) + { + /* we can't do it! */ + result_string_pointer = "DDS file was too small to contain the DDS header"; + return 0; + } + /* try reading in the header */ + memcpy ( (void*)(&header), (const void *)buffer, sizeof( DDS_header ) ); + buffer_index = sizeof( DDS_header ); + /* guilty until proven innocent */ + result_string_pointer = "Failed to read a known DDS header"; + /* validate the header (warning, "goto"'s ahead, shield your eyes!!) */ + flag = ('D'<<0)|('D'<<8)|('S'<<16)|(' '<<24); + if( header.dwMagic != flag ) {goto quick_exit;} + if( header.dwSize != 124 ) {goto quick_exit;} + /* I need all of these */ + flag = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT; + if( (header.dwFlags & flag) != flag ) {goto quick_exit;} + /* According to the MSDN spec, the dwFlags should contain + DDSD_LINEARSIZE if it's compressed, or DDSD_PITCH if + uncompressed. Some DDS writers do not conform to the + spec, so I need to make my reader more tolerant */ + /* I need one of these */ + flag = DDPF_FOURCC | DDPF_RGB; + if( (header.sPixelFormat.dwFlags & flag) == 0 ) {goto quick_exit;} + if( header.sPixelFormat.dwSize != 32 ) {goto quick_exit;} + if( (header.sCaps.dwCaps1 & DDSCAPS_TEXTURE) == 0 ) {goto quick_exit;} + /* make sure it is a type we can upload */ + if( (header.sPixelFormat.dwFlags & DDPF_FOURCC) && + !( + (header.sPixelFormat.dwFourCC == (('D'<<0)|('X'<<8)|('T'<<16)|('1'<<24))) || + (header.sPixelFormat.dwFourCC == (('D'<<0)|('X'<<8)|('T'<<16)|('3'<<24))) || + (header.sPixelFormat.dwFourCC == (('D'<<0)|('X'<<8)|('T'<<16)|('5'<<24))) + ) ) + { + goto quick_exit; + } + /* OK, validated the header, let's load the image data */ + result_string_pointer = "DDS header loaded and validated"; + width = header.dwWidth; + height = header.dwHeight; + uncompressed = 1 - (header.sPixelFormat.dwFlags & DDPF_FOURCC) / DDPF_FOURCC; + cubemap = (header.sCaps.dwCaps2 & DDSCAPS2_CUBEMAP) / DDSCAPS2_CUBEMAP; + if( uncompressed ) + { + S3TC_type = GL_RGB; + block_size = 3; + if( header.sPixelFormat.dwFlags & DDPF_ALPHAPIXELS ) + { + S3TC_type = GL_RGBA; + block_size = 4; + } + DDS_main_size = width * height * block_size; + } else + { + /* can we even handle direct uploading to OpenGL DXT compressed images? */ + if( query_DXT_capability() != SOIL_CAPABILITY_PRESENT ) + { + /* we can't do it! */ + result_string_pointer = "Direct upload of S3TC images not supported by the OpenGL driver"; + return 0; + } + /* well, we know it is DXT1/3/5, because we checked above */ + switch( (header.sPixelFormat.dwFourCC >> 24) - '0' ) + { + case 1: + S3TC_type = SOIL_RGBA_S3TC_DXT1; + block_size = 8; + break; + case 3: + S3TC_type = SOIL_RGBA_S3TC_DXT3; + block_size = 16; + break; + case 5: + S3TC_type = SOIL_RGBA_S3TC_DXT5; + block_size = 16; + break; + } + DDS_main_size = ((width+3)>>2)*((height+3)>>2)*block_size; + } + if( cubemap ) + { + /* does the user want a cubemap? */ + if( !loading_as_cubemap ) + { + /* we can't do it! */ + result_string_pointer = "DDS image was a cubemap"; + return 0; + } + /* can we even handle cubemaps with the OpenGL driver? */ + if( query_cubemap_capability() != SOIL_CAPABILITY_PRESENT ) + { + /* we can't do it! */ + result_string_pointer = "Direct upload of cubemap images not supported by the OpenGL driver"; + return 0; + } + ogl_target_start = SOIL_TEXTURE_CUBE_MAP_POSITIVE_X; + ogl_target_end = SOIL_TEXTURE_CUBE_MAP_NEGATIVE_Z; + opengl_texture_type = SOIL_TEXTURE_CUBE_MAP; + } else + { + /* does the user want a non-cubemap? */ + if( loading_as_cubemap ) + { + /* we can't do it! */ + result_string_pointer = "DDS image was not a cubemap"; + return 0; + } + ogl_target_start = GL_TEXTURE_2D; + ogl_target_end = GL_TEXTURE_2D; + opengl_texture_type = GL_TEXTURE_2D; + } + if( (header.sCaps.dwCaps1 & DDSCAPS_MIPMAP) && (header.dwMipMapCount > 1) ) + { + int shift_offset; + mipmaps = header.dwMipMapCount - 1; + DDS_full_size = DDS_main_size; + if( uncompressed ) + { + /* uncompressed DDS, simple MIPmap size calculation */ + shift_offset = 0; + } else + { + /* compressed DDS, MIPmap size calculation is block based */ + shift_offset = 2; + } + for( i = 1; i <= mipmaps; ++ i ) + { + int w, h; + w = width >> (shift_offset + i); + h = height >> (shift_offset + i); + if( w < 1 ) + { + w = 1; + } + if( h < 1 ) + { + h = 1; + } + DDS_full_size += w*h*block_size; + } + } else + { + mipmaps = 0; + DDS_full_size = DDS_main_size; + } + DDS_data = (unsigned char*)malloc( DDS_full_size ); + /* got the image data RAM, create or use an existing OpenGL texture handle */ + tex_ID = reuse_texture_ID; + if( tex_ID == 0 ) + { + glGenTextures( 1, &tex_ID ); + } + /* bind an OpenGL texture ID */ + glBindTexture( opengl_texture_type, tex_ID ); + /* do this for each face of the cubemap! */ + for( cf_target = ogl_target_start; cf_target <= ogl_target_end; ++cf_target ) + { + if( buffer_index + DDS_full_size <= buffer_length ) + { + unsigned int byte_offset = DDS_main_size; + memcpy( (void*)DDS_data, (const void*)(&buffer[buffer_index]), DDS_full_size ); + buffer_index += DDS_full_size; + /* upload the main chunk */ + if( uncompressed ) + { + /* and remember, DXT uncompressed uses BGR(A), + so swap to RGB(A) for ALL MIPmap levels */ + for( i = 0; i < DDS_full_size; i += block_size ) + { + unsigned char temp = DDS_data[i]; + DDS_data[i] = DDS_data[i+2]; + DDS_data[i+2] = temp; + } + glTexImage2D( + cf_target, 0, + S3TC_type, width, height, 0, + S3TC_type, GL_UNSIGNED_BYTE, DDS_data ); + } else + { + soilGlCompressedTexImage2D( + cf_target, 0, + S3TC_type, width, height, 0, + DDS_main_size, DDS_data ); + } + /* upload the mipmaps, if we have them */ + for( i = 1; i <= mipmaps; ++i ) + { + int w, h, mip_size; + w = width >> i; + h = height >> i; + if( w < 1 ) + { + w = 1; + } + if( h < 1 ) + { + h = 1; + } + /* upload this mipmap */ + if( uncompressed ) + { + mip_size = w*h*block_size; + glTexImage2D( + cf_target, i, + S3TC_type, w, h, 0, + S3TC_type, GL_UNSIGNED_BYTE, &DDS_data[byte_offset] ); + } else + { + mip_size = ((w+3)/4)*((h+3)/4)*block_size; + soilGlCompressedTexImage2D( + cf_target, i, + S3TC_type, w, h, 0, + mip_size, &DDS_data[byte_offset] ); + } + /* and move to the next mipmap */ + byte_offset += mip_size; + } + /* it worked! */ + result_string_pointer = "DDS file loaded"; + } else + { + glDeleteTextures( 1, & tex_ID ); + tex_ID = 0; + cf_target = ogl_target_end + 1; + result_string_pointer = "DDS file was too small for expected image data"; + } + }/* end reading each face */ + SOIL_free_image_data( DDS_data ); + if( tex_ID ) + { + /* did I have MIPmaps? */ + if( mipmaps > 0 ) + { + /* instruct OpenGL to use the MIPmaps */ + glTexParameteri( opengl_texture_type, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); + glTexParameteri( opengl_texture_type, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR ); + } else + { + /* instruct OpenGL _NOT_ to use the MIPmaps */ + glTexParameteri( opengl_texture_type, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); + glTexParameteri( opengl_texture_type, GL_TEXTURE_MIN_FILTER, GL_LINEAR ); + } + /* does the user want clamping, or wrapping? */ + if( flags & SOIL_FLAG_TEXTURE_REPEATS ) + { + glTexParameteri( opengl_texture_type, GL_TEXTURE_WRAP_S, GL_REPEAT ); + glTexParameteri( opengl_texture_type, GL_TEXTURE_WRAP_T, GL_REPEAT ); + glTexParameteri( opengl_texture_type, SOIL_TEXTURE_WRAP_R, GL_REPEAT ); + } else + { + /* unsigned int clamp_mode = SOIL_CLAMP_TO_EDGE; */ + unsigned int clamp_mode = GL_CLAMP; + glTexParameteri( opengl_texture_type, GL_TEXTURE_WRAP_S, clamp_mode ); + glTexParameteri( opengl_texture_type, GL_TEXTURE_WRAP_T, clamp_mode ); + glTexParameteri( opengl_texture_type, SOIL_TEXTURE_WRAP_R, clamp_mode ); + } + } + +quick_exit: + /* report success or failure */ + return tex_ID; +} + +unsigned int SOIL_direct_load_DDS( + const char *filename, + unsigned int reuse_texture_ID, + int flags, + int loading_as_cubemap ) +{ + FILE *f; + unsigned char *buffer; + size_t buffer_length, bytes_read; + unsigned int tex_ID = 0; + /* error checks */ + if( NULL == filename ) + { + result_string_pointer = "NULL filename"; + return 0; + } + f = fopen( filename, "rb" ); + if( NULL == f ) + { + /* the file doesn't seem to exist (or be open-able) */ + result_string_pointer = "Can not find DDS file"; + return 0; + } + fseek( f, 0, SEEK_END ); + buffer_length = ftell( f ); + fseek( f, 0, SEEK_SET ); + buffer = (unsigned char *) malloc( buffer_length ); + if( NULL == buffer ) + { + result_string_pointer = "malloc failed"; + fclose( f ); + return 0; + } + bytes_read = fread( (void*)buffer, 1, buffer_length, f ); + fclose( f ); + if( bytes_read < buffer_length ) + { + /* huh? */ + buffer_length = bytes_read; + } + /* now try to do the loading */ + tex_ID = SOIL_direct_load_DDS_from_memory( + (const unsigned char *const)buffer, buffer_length, + reuse_texture_ID, flags, loading_as_cubemap ); + SOIL_free_image_data( buffer ); + return tex_ID; +} + +int query_NPOT_capability( void ) +{ + /* check for the capability */ + if( has_NPOT_capability == SOIL_CAPABILITY_UNKNOWN ) + { + /* we haven't yet checked for the capability, do so */ + if( + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_ARB_texture_non_power_of_two" ) ) + ) + { + /* not there, flag the failure */ + has_NPOT_capability = SOIL_CAPABILITY_NONE; + } else + { + /* it's there! */ + has_NPOT_capability = SOIL_CAPABILITY_PRESENT; + } + } + /* let the user know if we can do non-power-of-two textures or not */ + return has_NPOT_capability; +} + +int query_tex_rectangle_capability( void ) +{ + /* check for the capability */ + if( has_tex_rectangle_capability == SOIL_CAPABILITY_UNKNOWN ) + { + /* we haven't yet checked for the capability, do so */ + if( + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_ARB_texture_rectangle" ) ) + && + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_EXT_texture_rectangle" ) ) + && + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_NV_texture_rectangle" ) ) + ) + { + /* not there, flag the failure */ + has_tex_rectangle_capability = SOIL_CAPABILITY_NONE; + } else + { + /* it's there! */ + has_tex_rectangle_capability = SOIL_CAPABILITY_PRESENT; + } + } + /* let the user know if we can do texture rectangles or not */ + return has_tex_rectangle_capability; +} + +int query_cubemap_capability( void ) +{ + /* check for the capability */ + if( has_cubemap_capability == SOIL_CAPABILITY_UNKNOWN ) + { + /* we haven't yet checked for the capability, do so */ + if( + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_ARB_texture_cube_map" ) ) + && + (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), + "GL_EXT_texture_cube_map" ) ) + ) + { + /* not there, flag the failure */ + has_cubemap_capability = SOIL_CAPABILITY_NONE; + } else + { + /* it's there! */ + has_cubemap_capability = SOIL_CAPABILITY_PRESENT; + } + } + /* let the user know if we can do cubemaps or not */ + return has_cubemap_capability; +} + +int query_DXT_capability( void ) +{ + /* check for the capability */ + if( has_DXT_capability == SOIL_CAPABILITY_UNKNOWN ) + { + /* we haven't yet checked for the capability, do so */ + if( NULL == strstr( + (char const*)glGetString( GL_EXTENSIONS ), + "GL_EXT_texture_compression_s3tc" ) ) + { + /* not there, flag the failure */ + has_DXT_capability = SOIL_CAPABILITY_NONE; + } else + { + /* and find the address of the extension function */ + P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC ext_addr = NULL; + #ifdef WIN32 + ext_addr = (P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC) + wglGetProcAddress + ( + "glCompressedTexImage2DARB" + ); + #elif defined(__APPLE__) || defined(__APPLE_CC__) + /* I can't test this Apple stuff! */ + CFBundleRef bundle; + CFURLRef bundleURL = + CFURLCreateWithFileSystemPath( + kCFAllocatorDefault, + CFSTR("/System/Library/Frameworks/OpenGL.framework"), + kCFURLPOSIXPathStyle, + true ); + CFStringRef extensionName = + CFStringCreateWithCString( + kCFAllocatorDefault, + "glCompressedTexImage2DARB", + kCFStringEncodingASCII ); + bundle = CFBundleCreate( kCFAllocatorDefault, bundleURL ); + assert( bundle != NULL ); + ext_addr = (P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC) + CFBundleGetFunctionPointerForName + ( + bundle, extensionName + ); + CFRelease( bundleURL ); + CFRelease( extensionName ); + CFRelease( bundle ); + #else + ext_addr = (P_SOIL_GLCOMPRESSEDTEXIMAGE2DPROC) + glXGetProcAddressARB + ( + (const GLubyte *)"glCompressedTexImage2DARB" + ); + #endif + /* Flag it so no checks needed later */ + if( NULL == ext_addr ) + { + /* hmm, not good!! This should not happen, but does on my + laptop's VIA chipset. The GL_EXT_texture_compression_s3tc + spec requires that ARB_texture_compression be present too. + this means I can upload and have the OpenGL drive do the + conversion, but I can't use my own routines or load DDS files + from disk and upload them directly [8^( */ + has_DXT_capability = SOIL_CAPABILITY_NONE; + } else + { + /* all's well! */ + soilGlCompressedTexImage2D = ext_addr; + has_DXT_capability = SOIL_CAPABILITY_PRESENT; + } + } + } + /* let the user know if we can do DXT or not */ + return has_DXT_capability; +} diff --git a/GrafikaProjekt/pliki/src/SOIL/SOIL.h b/GrafikaProjekt/pliki/src/SOIL/SOIL.h new file mode 100644 index 0000000..43f634f --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/SOIL.h @@ -0,0 +1,433 @@ +/** + @mainpage SOIL + + Jonathan Dummer + 2007-07-26-10.36 + + Simple OpenGL Image Library + + A tiny c library for uploading images as + textures into OpenGL. Also saving and + loading of images is supported. + + I'm using Sean's Tool Box image loader as a base: + http://www.nothings.org/ + + I'm upgrading it to load TGA and DDS files, and a direct + path for loading DDS files straight into OpenGL textures, + when applicable. + + Image Formats: + - BMP load & save + - TGA load & save + - DDS load & save + - PNG load + - JPG load + + OpenGL Texture Features: + - resample to power-of-two sizes + - MIPmap generation + - compressed texture S3TC formats (if supported) + - can pre-multiply alpha for you, for better compositing + - can flip image about the y-axis (except pre-compressed DDS files) + + Thanks to: + * Sean Barret - for the awesome stb_image + * Dan Venkitachalam - for finding some non-compliant DDS files, and patching some explicit casts + * everybody at gamedev.net +**/ + +#ifndef HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY +#define HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY + +#ifdef __cplusplus +extern "C" { +#endif + +/** + The format of images that may be loaded (force_channels). + SOIL_LOAD_AUTO leaves the image in whatever format it was found. + SOIL_LOAD_L forces the image to load as Luminous (greyscale) + SOIL_LOAD_LA forces the image to load as Luminous with Alpha + SOIL_LOAD_RGB forces the image to load as Red Green Blue + SOIL_LOAD_RGBA forces the image to load as Red Green Blue Alpha +**/ +enum +{ + SOIL_LOAD_AUTO = 0, + SOIL_LOAD_L = 1, + SOIL_LOAD_LA = 2, + SOIL_LOAD_RGB = 3, + SOIL_LOAD_RGBA = 4 +}; + +/** + Passed in as reuse_texture_ID, will cause SOIL to + register a new texture ID using glGenTextures(). + If the value passed into reuse_texture_ID > 0 then + SOIL will just re-use that texture ID (great for + reloading image assets in-game!) +**/ +enum +{ + SOIL_CREATE_NEW_ID = 0 +}; + +/** + flags you can pass into SOIL_load_OGL_texture() + and SOIL_create_OGL_texture(). + (note that if SOIL_FLAG_DDS_LOAD_DIRECT is used + the rest of the flags with the exception of + SOIL_FLAG_TEXTURE_REPEATS will be ignored while + loading already-compressed DDS files.) + + SOIL_FLAG_POWER_OF_TWO: force the image to be POT + SOIL_FLAG_MIPMAPS: generate mipmaps for the texture + SOIL_FLAG_TEXTURE_REPEATS: otherwise will clamp + SOIL_FLAG_MULTIPLY_ALPHA: for using (GL_ONE,GL_ONE_MINUS_SRC_ALPHA) blending + SOIL_FLAG_INVERT_Y: flip the image vertically + SOIL_FLAG_COMPRESS_TO_DXT: if the card can display them, will convert RGB to DXT1, RGBA to DXT5 + SOIL_FLAG_DDS_LOAD_DIRECT: will load DDS files directly without _ANY_ additional processing + SOIL_FLAG_NTSC_SAFE_RGB: clamps RGB components to the range [16,235] + SOIL_FLAG_CoCg_Y: Google YCoCg; RGB=>CoYCg, RGBA=>CoCgAY + SOIL_FLAG_TEXTURE_RECTANGE: uses ARB_texture_rectangle ; pixel indexed & no repeat or MIPmaps or cubemaps +**/ +enum +{ + SOIL_FLAG_POWER_OF_TWO = 1, + SOIL_FLAG_MIPMAPS = 2, + SOIL_FLAG_TEXTURE_REPEATS = 4, + SOIL_FLAG_MULTIPLY_ALPHA = 8, + SOIL_FLAG_INVERT_Y = 16, + SOIL_FLAG_COMPRESS_TO_DXT = 32, + SOIL_FLAG_DDS_LOAD_DIRECT = 64, + SOIL_FLAG_NTSC_SAFE_RGB = 128, + SOIL_FLAG_CoCg_Y = 256, + SOIL_FLAG_TEXTURE_RECTANGLE = 512 +}; + +/** + The types of images that may be saved. + (TGA supports uncompressed RGB / RGBA) + (BMP supports uncompressed RGB) + (DDS supports DXT1 and DXT5) +**/ +enum +{ + SOIL_SAVE_TYPE_TGA = 0, + SOIL_SAVE_TYPE_BMP = 1, + SOIL_SAVE_TYPE_DDS = 2 +}; + +/** + Defines the order of faces in a DDS cubemap. + I recommend that you use the same order in single + image cubemap files, so they will be interchangeable + with DDS cubemaps when using SOIL. +**/ +#define SOIL_DDS_CUBEMAP_FACE_ORDER "EWUDNS" + +/** + The types of internal fake HDR representations + + SOIL_HDR_RGBE: RGB * pow( 2.0, A - 128.0 ) + SOIL_HDR_RGBdivA: RGB / A + SOIL_HDR_RGBdivA2: RGB / (A*A) +**/ +enum +{ + SOIL_HDR_RGBE = 0, + SOIL_HDR_RGBdivA = 1, + SOIL_HDR_RGBdivA2 = 2 +}; + +/** + Loads an image from disk into an OpenGL texture. + \param filename the name of the file to upload as a texture + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_texture + ( + const char *filename, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads 6 images from disk into an OpenGL cubemap texture. + \param x_pos_file the name of the file to upload as the +x cube face + \param x_neg_file the name of the file to upload as the -x cube face + \param y_pos_file the name of the file to upload as the +y cube face + \param y_neg_file the name of the file to upload as the -y cube face + \param z_pos_file the name of the file to upload as the +z cube face + \param z_neg_file the name of the file to upload as the -z cube face + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_cubemap + ( + const char *x_pos_file, + const char *x_neg_file, + const char *y_pos_file, + const char *y_neg_file, + const char *z_pos_file, + const char *z_neg_file, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads 1 image from disk and splits it into an OpenGL cubemap texture. + \param filename the name of the file to upload as a texture + \param face_order the order of the faces in the file, any combination of NSWEUD, for North, South, Up, etc. + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_single_cubemap + ( + const char *filename, + const char face_order[6], + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads an HDR image from disk into an OpenGL texture. + \param filename the name of the file to upload as a texture + \param fake_HDR_format SOIL_HDR_RGBE, SOIL_HDR_RGBdivA, SOIL_HDR_RGBdivA2 + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_HDR_texture + ( + const char *filename, + int fake_HDR_format, + int rescale_to_max, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads an image from RAM into an OpenGL texture. + \param buffer the image data in RAM just as if it were still in a file + \param buffer_length the size of the buffer in bytes + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_texture_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads 6 images from memory into an OpenGL cubemap texture. + \param x_pos_buffer the image data in RAM to upload as the +x cube face + \param x_pos_buffer_length the size of the above buffer + \param x_neg_buffer the image data in RAM to upload as the +x cube face + \param x_neg_buffer_length the size of the above buffer + \param y_pos_buffer the image data in RAM to upload as the +x cube face + \param y_pos_buffer_length the size of the above buffer + \param y_neg_buffer the image data in RAM to upload as the +x cube face + \param y_neg_buffer_length the size of the above buffer + \param z_pos_buffer the image data in RAM to upload as the +x cube face + \param z_pos_buffer_length the size of the above buffer + \param z_neg_buffer the image data in RAM to upload as the +x cube face + \param z_neg_buffer_length the size of the above buffer + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_cubemap_from_memory + ( + const unsigned char *const x_pos_buffer, + int x_pos_buffer_length, + const unsigned char *const x_neg_buffer, + int x_neg_buffer_length, + const unsigned char *const y_pos_buffer, + int y_pos_buffer_length, + const unsigned char *const y_neg_buffer, + int y_neg_buffer_length, + const unsigned char *const z_pos_buffer, + int z_pos_buffer_length, + const unsigned char *const z_neg_buffer, + int z_neg_buffer_length, + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Loads 1 image from RAM and splits it into an OpenGL cubemap texture. + \param buffer the image data in RAM just as if it were still in a file + \param buffer_length the size of the buffer in bytes + \param face_order the order of the faces in the file, any combination of NSWEUD, for North, South, Up, etc. + \param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_load_OGL_single_cubemap_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + const char face_order[6], + int force_channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Creates a 2D OpenGL texture from raw image data. Note that the raw data is + _NOT_ freed after the upload (so the user can load various versions). + \param data the raw data to be uploaded as an OpenGL texture + \param width the width of the image in pixels + \param height the height of the image in pixels + \param channels the number of channels: 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_create_OGL_texture + ( + const unsigned char *const data, + int width, int height, int channels, + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Creates an OpenGL cubemap texture by splitting up 1 image into 6 parts. + \param data the raw data to be uploaded as an OpenGL texture + \param width the width of the image in pixels + \param height the height of the image in pixels + \param channels the number of channels: 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA + \param face_order the order of the faces in the file, and combination of NSWEUD, for North, South, Up, etc. + \param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture) + \param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT + \return 0-failed, otherwise returns the OpenGL texture handle +**/ +unsigned int + SOIL_create_OGL_single_cubemap + ( + const unsigned char *const data, + int width, int height, int channels, + const char face_order[6], + unsigned int reuse_texture_ID, + unsigned int flags + ); + +/** + Captures the OpenGL window (RGB) and saves it to disk + \return 0 if it failed, otherwise returns 1 +**/ +int + SOIL_save_screenshot + ( + const char *filename, + int image_type, + int x, int y, + int width, int height + ); + +/** + Loads an image from disk into an array of unsigned chars. + Note that *channels return the original channel count of the + image. If force_channels was other than SOIL_LOAD_AUTO, + the resulting image has force_channels, but *channels may be + different (if the original image had a different channel + count). + \return 0 if failed, otherwise returns 1 +**/ +unsigned char* + SOIL_load_image + ( + const char *filename, + int *width, int *height, int *channels, + int force_channels + ); + +/** + Loads an image from memory into an array of unsigned chars. + Note that *channels return the original channel count of the + image. If force_channels was other than SOIL_LOAD_AUTO, + the resulting image has force_channels, but *channels may be + different (if the original image had a different channel + count). + \return 0 if failed, otherwise returns 1 +**/ +unsigned char* + SOIL_load_image_from_memory + ( + const unsigned char *const buffer, + int buffer_length, + int *width, int *height, int *channels, + int force_channels + ); + +/** + Saves an image from an array of unsigned chars (RGBA) to disk + \return 0 if failed, otherwise returns 1 +**/ +int + SOIL_save_image + ( + const char *filename, + int image_type, + int width, int height, int channels, + const unsigned char *const data + ); + +/** + Frees the image data (note, this is just C's "free()"...this function is + present mostly so C++ programmers don't forget to use "free()" and call + "delete []" instead [8^) +**/ +void + SOIL_free_image_data + ( + unsigned char *img_data + ); + +/** + This function resturn a pointer to a string describing the last thing + that happened inside SOIL. It can be used to determine why an image + failed to load. +**/ +const char* + SOIL_last_result + ( + void + ); + + +#ifdef __cplusplus +} +#endif + +#endif /* HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY */ diff --git a/GrafikaProjekt/pliki/src/SOIL/image_DXT.c b/GrafikaProjekt/pliki/src/SOIL/image_DXT.c new file mode 100644 index 0000000..4206a1b --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/image_DXT.c @@ -0,0 +1,632 @@ +/* + Jonathan Dummer + 2007-07-31-10.32 + + simple DXT compression / decompression code + + public domain +*/ + +#include "image_DXT.h" +#include +#include +#include +#include + +/* set this =1 if you want to use the covarince matrix method... + which is better than my method of using standard deviations + overall, except on the infintesimal chance that the power + method fails for finding the largest eigenvector */ +#define USE_COV_MAT 1 + +/********* Function Prototypes *********/ +/* + Takes a 4x4 block of pixels and compresses it into 8 bytes + in DXT1 format (color only, no alpha). Speed is valued + over prettyness, at least for now. +*/ +void compress_DDS_color_block( + int channels, + const unsigned char *const uncompressed, + unsigned char compressed[8] ); +/* + Takes a 4x4 block of pixels and compresses the alpha + component it into 8 bytes for use in DXT5 DDS files. + Speed is valued over prettyness, at least for now. +*/ +void compress_DDS_alpha_block( + const unsigned char *const uncompressed, + unsigned char compressed[8] ); + +/********* Actual Exposed Functions *********/ +int + save_image_as_DDS + ( + const char *filename, + int width, int height, int channels, + const unsigned char *const data + ) +{ + /* variables */ + FILE *fout; + unsigned char *DDS_data; + DDS_header header; + int DDS_size; + /* error check */ + if( (NULL == filename) || + (width < 1) || (height < 1) || + (channels < 1) || (channels > 4) || + (data == NULL ) ) + { + return 0; + } + /* Convert the image */ + if( (channels & 1) == 1 ) + { + /* no alpha, just use DXT1 */ + DDS_data = convert_image_to_DXT1( data, width, height, channels, &DDS_size ); + } else + { + /* has alpha, so use DXT5 */ + DDS_data = convert_image_to_DXT5( data, width, height, channels, &DDS_size ); + } + /* save it */ + memset( &header, 0, sizeof( DDS_header ) ); + header.dwMagic = ('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24); + header.dwSize = 124; + header.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT | DDSD_LINEARSIZE; + header.dwWidth = width; + header.dwHeight = height; + header.dwPitchOrLinearSize = DDS_size; + header.sPixelFormat.dwSize = 32; + header.sPixelFormat.dwFlags = DDPF_FOURCC; + if( (channels & 1) == 1 ) + { + header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('1' << 24); + } else + { + header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('5' << 24); + } + header.sCaps.dwCaps1 = DDSCAPS_TEXTURE; + /* write it out */ + fout = fopen( filename, "wb"); + fwrite( &header, sizeof( DDS_header ), 1, fout ); + fwrite( DDS_data, 1, DDS_size, fout ); + fclose( fout ); + /* done */ + free( DDS_data ); + return 1; +} + +unsigned char* convert_image_to_DXT1( + const unsigned char *const uncompressed, + int width, int height, int channels, + int *out_size ) +{ + unsigned char *compressed; + int i, j, x, y; + unsigned char ublock[16*3]; + unsigned char cblock[8]; + int index = 0, chan_step = 1; + int block_count = 0; + /* error check */ + *out_size = 0; + if( (width < 1) || (height < 1) || + (NULL == uncompressed) || + (channels < 1) || (channels > 4) ) + { + return NULL; + } + /* for channels == 1 or 2, I do not step forward for R,G,B values */ + if( channels < 3 ) + { + chan_step = 0; + } + /* get the RAM for the compressed image + (8 bytes per 4x4 pixel block) */ + *out_size = ((width+3) >> 2) * ((height+3) >> 2) * 8; + compressed = (unsigned char*)malloc( *out_size ); + /* go through each block */ + for( j = 0; j < height; j += 4 ) + { + for( i = 0; i < width; i += 4 ) + { + /* copy this block into a new one */ + int idx = 0; + int mx = 4, my = 4; + if( j+4 >= height ) + { + my = height - j; + } + if( i+4 >= width ) + { + mx = width - i; + } + for( y = 0; y < my; ++y ) + { + for( x = 0; x < mx; ++x ) + { + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels]; + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step]; + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step]; + } + for( x = mx; x < 4; ++x ) + { + ublock[idx++] = ublock[0]; + ublock[idx++] = ublock[1]; + ublock[idx++] = ublock[2]; + } + } + for( y = my; y < 4; ++y ) + { + for( x = 0; x < 4; ++x ) + { + ublock[idx++] = ublock[0]; + ublock[idx++] = ublock[1]; + ublock[idx++] = ublock[2]; + } + } + /* compress the block */ + ++block_count; + compress_DDS_color_block( 3, ublock, cblock ); + /* copy the data from the block into the main block */ + for( x = 0; x < 8; ++x ) + { + compressed[index++] = cblock[x]; + } + } + } + return compressed; +} + +unsigned char* convert_image_to_DXT5( + const unsigned char *const uncompressed, + int width, int height, int channels, + int *out_size ) +{ + unsigned char *compressed; + int i, j, x, y; + unsigned char ublock[16*4]; + unsigned char cblock[8]; + int index = 0, chan_step = 1; + int block_count = 0, has_alpha; + /* error check */ + *out_size = 0; + if( (width < 1) || (height < 1) || + (NULL == uncompressed) || + (channels < 1) || ( channels > 4) ) + { + return NULL; + } + /* for channels == 1 or 2, I do not step forward for R,G,B vales */ + if( channels < 3 ) + { + chan_step = 0; + } + /* # channels = 1 or 3 have no alpha, 2 & 4 do have alpha */ + has_alpha = 1 - (channels & 1); + /* get the RAM for the compressed image + (16 bytes per 4x4 pixel block) */ + *out_size = ((width+3) >> 2) * ((height+3) >> 2) * 16; + compressed = (unsigned char*)malloc( *out_size ); + /* go through each block */ + for( j = 0; j < height; j += 4 ) + { + for( i = 0; i < width; i += 4 ) + { + /* local variables, and my block counter */ + int idx = 0; + int mx = 4, my = 4; + if( j+4 >= height ) + { + my = height - j; + } + if( i+4 >= width ) + { + mx = width - i; + } + for( y = 0; y < my; ++y ) + { + for( x = 0; x < mx; ++x ) + { + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels]; + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step]; + ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step]; + ublock[idx++] = + has_alpha * uncompressed[(j+y)*width*channels+(i+x)*channels+channels-1] + + (1-has_alpha)*255; + } + for( x = mx; x < 4; ++x ) + { + ublock[idx++] = ublock[0]; + ublock[idx++] = ublock[1]; + ublock[idx++] = ublock[2]; + ublock[idx++] = ublock[3]; + } + } + for( y = my; y < 4; ++y ) + { + for( x = 0; x < 4; ++x ) + { + ublock[idx++] = ublock[0]; + ublock[idx++] = ublock[1]; + ublock[idx++] = ublock[2]; + ublock[idx++] = ublock[3]; + } + } + /* now compress the alpha block */ + compress_DDS_alpha_block( ublock, cblock ); + /* copy the data from the compressed alpha block into the main buffer */ + for( x = 0; x < 8; ++x ) + { + compressed[index++] = cblock[x]; + } + /* then compress the color block */ + ++block_count; + compress_DDS_color_block( 4, ublock, cblock ); + /* copy the data from the compressed color block into the main buffer */ + for( x = 0; x < 8; ++x ) + { + compressed[index++] = cblock[x]; + } + } + } + return compressed; +} + +/********* Helper Functions *********/ +int convert_bit_range( int c, int from_bits, int to_bits ) +{ + int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1); + return (b + (b >> from_bits)) >> from_bits; +} + +int rgb_to_565( int r, int g, int b ) +{ + return + (convert_bit_range( r, 8, 5 ) << 11) | + (convert_bit_range( g, 8, 6 ) << 05) | + (convert_bit_range( b, 8, 5 ) << 00); +} + +void rgb_888_from_565( unsigned int c, int *r, int *g, int *b ) +{ + *r = convert_bit_range( (c >> 11) & 31, 5, 8 ); + *g = convert_bit_range( (c >> 05) & 63, 6, 8 ); + *b = convert_bit_range( (c >> 00) & 31, 5, 8 ); +} + +void compute_color_line_STDEV( + const unsigned char *const uncompressed, + int channels, + float point[3], float direction[3] ) +{ + const float inv_16 = 1.0f / 16.0f; + int i; + float sum_r = 0.0f, sum_g = 0.0f, sum_b = 0.0f; + float sum_rr = 0.0f, sum_gg = 0.0f, sum_bb = 0.0f; + float sum_rg = 0.0f, sum_rb = 0.0f, sum_gb = 0.0f; + /* calculate all data needed for the covariance matrix + ( to compare with _rygdxt code) */ + for( i = 0; i < 16*channels; i += channels ) + { + sum_r += uncompressed[i+0]; + sum_rr += uncompressed[i+0] * uncompressed[i+0]; + sum_g += uncompressed[i+1]; + sum_gg += uncompressed[i+1] * uncompressed[i+1]; + sum_b += uncompressed[i+2]; + sum_bb += uncompressed[i+2] * uncompressed[i+2]; + sum_rg += uncompressed[i+0] * uncompressed[i+1]; + sum_rb += uncompressed[i+0] * uncompressed[i+2]; + sum_gb += uncompressed[i+1] * uncompressed[i+2]; + } + /* convert the sums to averages */ + sum_r *= inv_16; + sum_g *= inv_16; + sum_b *= inv_16; + /* and convert the squares to the squares of the value - avg_value */ + sum_rr -= 16.0f * sum_r * sum_r; + sum_gg -= 16.0f * sum_g * sum_g; + sum_bb -= 16.0f * sum_b * sum_b; + sum_rg -= 16.0f * sum_r * sum_g; + sum_rb -= 16.0f * sum_r * sum_b; + sum_gb -= 16.0f * sum_g * sum_b; + /* the point on the color line is the average */ + point[0] = sum_r; + point[1] = sum_g; + point[2] = sum_b; + #if USE_COV_MAT + /* + The following idea was from ryg. + (https://mollyrocket.com/forums/viewtopic.php?t=392) + The method worked great (less RMSE than mine) most of + the time, but had some issues handling some simple + boundary cases, like full green next to full red, + which would generate a covariance matrix like this: + + | 1 -1 0 | + | -1 1 0 | + | 0 0 0 | + + For a given starting vector, the power method can + generate all zeros! So no starting with {1,1,1} + as I was doing! This kind of error is still a + slight posibillity, but will be very rare. + */ + /* use the covariance matrix directly + (1st iteration, don't use all 1.0 values!) */ + sum_r = 1.0f; + sum_g = 2.718281828f; + sum_b = 3.141592654f; + direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb; + direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb; + direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb; + /* 2nd iteration, use results from the 1st guy */ + sum_r = direction[0]; + sum_g = direction[1]; + sum_b = direction[2]; + direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb; + direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb; + direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb; + /* 3rd iteration, use results from the 2nd guy */ + sum_r = direction[0]; + sum_g = direction[1]; + sum_b = direction[2]; + direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb; + direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb; + direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb; + #else + /* use my standard deviation method + (very robust, a tiny bit slower and less accurate) */ + direction[0] = sqrt( sum_rr ); + direction[1] = sqrt( sum_gg ); + direction[2] = sqrt( sum_bb ); + /* which has a greater component */ + if( sum_gg > sum_rr ) + { + /* green has greater component, so base the other signs off of green */ + if( sum_rg < 0.0f ) + { + direction[0] = -direction[0]; + } + if( sum_gb < 0.0f ) + { + direction[2] = -direction[2]; + } + } else + { + /* red has a greater component */ + if( sum_rg < 0.0f ) + { + direction[1] = -direction[1]; + } + if( sum_rb < 0.0f ) + { + direction[2] = -direction[2]; + } + } + #endif +} + +void LSE_master_colors_max_min( + int *cmax, int *cmin, + int channels, + const unsigned char *const uncompressed ) +{ + int i, j; + /* the master colors */ + int c0[3], c1[3]; + /* used for fitting the line */ + float sum_x[] = { 0.0f, 0.0f, 0.0f }; + float sum_x2[] = { 0.0f, 0.0f, 0.0f }; + float dot_max = 1.0f, dot_min = -1.0f; + float vec_len2 = 0.0f; + float dot; + /* error check */ + if( (channels < 3) || (channels > 4) ) + { + return; + } + compute_color_line_STDEV( uncompressed, channels, sum_x, sum_x2 ); + vec_len2 = 1.0f / ( 0.00001f + + sum_x2[0]*sum_x2[0] + sum_x2[1]*sum_x2[1] + sum_x2[2]*sum_x2[2] ); + /* finding the max and min vector values */ + dot_max = + ( + sum_x2[0] * uncompressed[0] + + sum_x2[1] * uncompressed[1] + + sum_x2[2] * uncompressed[2] + ); + dot_min = dot_max; + for( i = 1; i < 16; ++i ) + { + dot = + ( + sum_x2[0] * uncompressed[i*channels+0] + + sum_x2[1] * uncompressed[i*channels+1] + + sum_x2[2] * uncompressed[i*channels+2] + ); + if( dot < dot_min ) + { + dot_min = dot; + } else if( dot > dot_max ) + { + dot_max = dot; + } + } + /* and the offset (from the average location) */ + dot = sum_x2[0]*sum_x[0] + sum_x2[1]*sum_x[1] + sum_x2[2]*sum_x[2]; + dot_min -= dot; + dot_max -= dot; + /* post multiply by the scaling factor */ + dot_min *= vec_len2; + dot_max *= vec_len2; + /* OK, build the master colors */ + for( i = 0; i < 3; ++i ) + { + /* color 0 */ + c0[i] = (int)(0.5f + sum_x[i] + dot_max * sum_x2[i]); + if( c0[i] < 0 ) + { + c0[i] = 0; + } else if( c0[i] > 255 ) + { + c0[i] = 255; + } + /* color 1 */ + c1[i] = (int)(0.5f + sum_x[i] + dot_min * sum_x2[i]); + if( c1[i] < 0 ) + { + c1[i] = 0; + } else if( c1[i] > 255 ) + { + c1[i] = 255; + } + } + /* down_sample (with rounding?) */ + i = rgb_to_565( c0[0], c0[1], c0[2] ); + j = rgb_to_565( c1[0], c1[1], c1[2] ); + if( i > j ) + { + *cmax = i; + *cmin = j; + } else + { + *cmax = j; + *cmin = i; + } +} + +void + compress_DDS_color_block + ( + int channels, + const unsigned char *const uncompressed, + unsigned char compressed[8] + ) +{ + /* variables */ + int i; + int next_bit; + int enc_c0, enc_c1; + int c0[4], c1[4]; + float color_line[] = { 0.0f, 0.0f, 0.0f, 0.0f }; + float vec_len2 = 0.0f, dot_offset = 0.0f; + /* stupid order */ + int swizzle4[] = { 0, 2, 3, 1 }; + /* get the master colors */ + LSE_master_colors_max_min( &enc_c0, &enc_c1, channels, uncompressed ); + /* store the 565 color 0 and color 1 */ + compressed[0] = (enc_c0 >> 0) & 255; + compressed[1] = (enc_c0 >> 8) & 255; + compressed[2] = (enc_c1 >> 0) & 255; + compressed[3] = (enc_c1 >> 8) & 255; + /* zero out the compressed data */ + compressed[4] = 0; + compressed[5] = 0; + compressed[6] = 0; + compressed[7] = 0; + /* reconstitute the master color vectors */ + rgb_888_from_565( enc_c0, &c0[0], &c0[1], &c0[2] ); + rgb_888_from_565( enc_c1, &c1[0], &c1[1], &c1[2] ); + /* the new vector */ + vec_len2 = 0.0f; + for( i = 0; i < 3; ++i ) + { + color_line[i] = (float)(c1[i] - c0[i]); + vec_len2 += color_line[i] * color_line[i]; + } + if( vec_len2 > 0.0f ) + { + vec_len2 = 1.0f / vec_len2; + } + /* pre-proform the scaling */ + color_line[0] *= vec_len2; + color_line[1] *= vec_len2; + color_line[2] *= vec_len2; + /* compute the offset (constant) portion of the dot product */ + dot_offset = color_line[0]*c0[0] + color_line[1]*c0[1] + color_line[2]*c0[2]; + /* store the rest of the bits */ + next_bit = 8*4; + for( i = 0; i < 16; ++i ) + { + /* find the dot product of this color, to place it on the line + (should be [-1,1]) */ + int next_value = 0; + float dot_product = + color_line[0] * uncompressed[i*channels+0] + + color_line[1] * uncompressed[i*channels+1] + + color_line[2] * uncompressed[i*channels+2] - + dot_offset; + /* map to [0,3] */ + next_value = (int)( dot_product * 3.0f + 0.5f ); + if( next_value > 3 ) + { + next_value = 3; + } else if( next_value < 0 ) + { + next_value = 0; + } + /* OK, store this value */ + compressed[next_bit >> 3] |= swizzle4[ next_value ] << (next_bit & 7); + next_bit += 2; + } + /* done compressing to DXT1 */ +} + +void + compress_DDS_alpha_block + ( + const unsigned char *const uncompressed, + unsigned char compressed[8] + ) +{ + /* variables */ + int i; + int next_bit; + int a0, a1; + float scale_me; + /* stupid order */ + int swizzle8[] = { 1, 7, 6, 5, 4, 3, 2, 0 }; + /* get the alpha limits (a0 > a1) */ + a0 = a1 = uncompressed[3]; + for( i = 4+3; i < 16*4; i += 4 ) + { + if( uncompressed[i] > a0 ) + { + a0 = uncompressed[i]; + } else if( uncompressed[i] < a1 ) + { + a1 = uncompressed[i]; + } + } + /* store those limits, and zero the rest of the compressed dataset */ + compressed[0] = a0; + compressed[1] = a1; + /* zero out the compressed data */ + compressed[2] = 0; + compressed[3] = 0; + compressed[4] = 0; + compressed[5] = 0; + compressed[6] = 0; + compressed[7] = 0; + /* store the all of the alpha values */ + next_bit = 8*2; + scale_me = 7.9999f / (a0 - a1); + for( i = 3; i < 16*4; i += 4 ) + { + /* convert this alpha value to a 3 bit number */ + int svalue; + int value = (int)((uncompressed[i] - a1) * scale_me); + svalue = swizzle8[ value&7 ]; + /* OK, store this value, start with the 1st byte */ + compressed[next_bit >> 3] |= svalue << (next_bit & 7); + if( (next_bit & 7) > 5 ) + { + /* spans 2 bytes, fill in the start of the 2nd byte */ + compressed[1 + (next_bit >> 3)] |= svalue >> (8 - (next_bit & 7) ); + } + next_bit += 3; + } + /* done compressing to DXT1 */ +} diff --git a/GrafikaProjekt/pliki/src/SOIL/image_DXT.h b/GrafikaProjekt/pliki/src/SOIL/image_DXT.h new file mode 100644 index 0000000..75f604f --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/image_DXT.h @@ -0,0 +1,123 @@ +/* + Jonathan Dummer + 2007-07-31-10.32 + + simple DXT compression / decompression code + + public domain +*/ + +#ifndef HEADER_IMAGE_DXT +#define HEADER_IMAGE_DXT + +/** + Converts an image from an array of unsigned chars (RGB or RGBA) to + DXT1 or DXT5, then saves the converted image to disk. + \return 0 if failed, otherwise returns 1 +**/ +int +save_image_as_DDS +( + const char *filename, + int width, int height, int channels, + const unsigned char *const data +); + +/** + take an image and convert it to DXT1 (no alpha) +**/ +unsigned char* +convert_image_to_DXT1 +( + const unsigned char *const uncompressed, + int width, int height, int channels, + int *out_size +); + +/** + take an image and convert it to DXT5 (with alpha) +**/ +unsigned char* +convert_image_to_DXT5 +( + const unsigned char *const uncompressed, + int width, int height, int channels, + int *out_size +); + +/** A bunch of DirectDraw Surface structures and flags **/ +typedef struct +{ + unsigned int dwMagic; + unsigned int dwSize; + unsigned int dwFlags; + unsigned int dwHeight; + unsigned int dwWidth; + unsigned int dwPitchOrLinearSize; + unsigned int dwDepth; + unsigned int dwMipMapCount; + unsigned int dwReserved1[ 11 ]; + + /* DDPIXELFORMAT */ + struct + { + unsigned int dwSize; + unsigned int dwFlags; + unsigned int dwFourCC; + unsigned int dwRGBBitCount; + unsigned int dwRBitMask; + unsigned int dwGBitMask; + unsigned int dwBBitMask; + unsigned int dwAlphaBitMask; + } + sPixelFormat; + + /* DDCAPS2 */ + struct + { + unsigned int dwCaps1; + unsigned int dwCaps2; + unsigned int dwDDSX; + unsigned int dwReserved; + } + sCaps; + unsigned int dwReserved2; +} +DDS_header ; + +/* the following constants were copied directly off the MSDN website */ + +/* The dwFlags member of the original DDSURFACEDESC2 structure + can be set to one or more of the following values. */ +#define DDSD_CAPS 0x00000001 +#define DDSD_HEIGHT 0x00000002 +#define DDSD_WIDTH 0x00000004 +#define DDSD_PITCH 0x00000008 +#define DDSD_PIXELFORMAT 0x00001000 +#define DDSD_MIPMAPCOUNT 0x00020000 +#define DDSD_LINEARSIZE 0x00080000 +#define DDSD_DEPTH 0x00800000 + +/* DirectDraw Pixel Format */ +#define DDPF_ALPHAPIXELS 0x00000001 +#define DDPF_FOURCC 0x00000004 +#define DDPF_RGB 0x00000040 + +/* The dwCaps1 member of the DDSCAPS2 structure can be + set to one or more of the following values. */ +#define DDSCAPS_COMPLEX 0x00000008 +#define DDSCAPS_TEXTURE 0x00001000 +#define DDSCAPS_MIPMAP 0x00400000 + +/* The dwCaps2 member of the DDSCAPS2 structure can be + set to one or more of the following values. */ +#define DDSCAPS2_CUBEMAP 0x00000200 +#define DDSCAPS2_CUBEMAP_POSITIVEX 0x00000400 +#define DDSCAPS2_CUBEMAP_NEGATIVEX 0x00000800 +#define DDSCAPS2_CUBEMAP_POSITIVEY 0x00001000 +#define DDSCAPS2_CUBEMAP_NEGATIVEY 0x00002000 +#define DDSCAPS2_CUBEMAP_POSITIVEZ 0x00004000 +#define DDSCAPS2_CUBEMAP_NEGATIVEZ 0x00008000 +#define DDSCAPS2_VOLUME 0x00200000 + +#endif /* HEADER_IMAGE_DXT */ diff --git a/GrafikaProjekt/pliki/src/SOIL/image_helper.c b/GrafikaProjekt/pliki/src/SOIL/image_helper.c new file mode 100644 index 0000000..d22340f --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/image_helper.c @@ -0,0 +1,435 @@ +/* + Jonathan Dummer + + image helper functions + + MIT license +*/ + +#include "image_helper.h" +#include +#include + +/* Upscaling the image uses simple bilinear interpolation */ +int + up_scale_image + ( + const unsigned char* const orig, + int width, int height, int channels, + unsigned char* resampled, + int resampled_width, int resampled_height + ) +{ + float dx, dy; + int x, y, c; + + /* error(s) check */ + if ( (width < 1) || (height < 1) || + (resampled_width < 2) || (resampled_height < 2) || + (channels < 1) || + (NULL == orig) || (NULL == resampled) ) + { + /* signify badness */ + return 0; + } + /* + for each given pixel in the new map, find the exact location + from the original map which would contribute to this guy + */ + dx = (width - 1.0f) / (resampled_width - 1.0f); + dy = (height - 1.0f) / (resampled_height - 1.0f); + for ( y = 0; y < resampled_height; ++y ) + { + /* find the base y index and fractional offset from that */ + float sampley = y * dy; + int inty = (int)sampley; + /* if( inty < 0 ) { inty = 0; } else */ + if( inty > height - 2 ) { inty = height - 2; } + sampley -= inty; + for ( x = 0; x < resampled_width; ++x ) + { + float samplex = x * dx; + int intx = (int)samplex; + int base_index; + /* find the base x index and fractional offset from that */ + /* if( intx < 0 ) { intx = 0; } else */ + if( intx > width - 2 ) { intx = width - 2; } + samplex -= intx; + /* base index into the original image */ + base_index = (inty * width + intx) * channels; + for ( c = 0; c < channels; ++c ) + { + /* do the sampling */ + float value = 0.5f; + value += orig[base_index] + *(1.0f-samplex)*(1.0f-sampley); + value += orig[base_index+channels] + *(samplex)*(1.0f-sampley); + value += orig[base_index+width*channels] + *(1.0f-samplex)*(sampley); + value += orig[base_index+width*channels+channels] + *(samplex)*(sampley); + /* move to the next channel */ + ++base_index; + /* save the new value */ + resampled[y*resampled_width*channels+x*channels+c] = + (unsigned char)(value); + } + } + } + /* done */ + return 1; +} + +int + mipmap_image + ( + const unsigned char* const orig, + int width, int height, int channels, + unsigned char* resampled, + int block_size_x, int block_size_y + ) +{ + int mip_width, mip_height; + int i, j, c; + + /* error check */ + if( (width < 1) || (height < 1) || + (channels < 1) || (orig == NULL) || + (resampled == NULL) || + (block_size_x < 1) || (block_size_y < 1) ) + { + /* nothing to do */ + return 0; + } + mip_width = width / block_size_x; + mip_height = height / block_size_y; + if( mip_width < 1 ) + { + mip_width = 1; + } + if( mip_height < 1 ) + { + mip_height = 1; + } + for( j = 0; j < mip_height; ++j ) + { + for( i = 0; i < mip_width; ++i ) + { + for( c = 0; c < channels; ++c ) + { + const int index = (j*block_size_y)*width*channels + (i*block_size_x)*channels + c; + int sum_value; + int u,v; + int u_block = block_size_x; + int v_block = block_size_y; + int block_area; + /* do a bit of checking so we don't over-run the boundaries + (necessary for non-square textures!) */ + if( block_size_x * (i+1) > width ) + { + u_block = width - i*block_size_y; + } + if( block_size_y * (j+1) > height ) + { + v_block = height - j*block_size_y; + } + block_area = u_block*v_block; + /* for this pixel, see what the average + of all the values in the block are. + note: start the sum at the rounding value, not at 0 */ + sum_value = block_area >> 1; + for( v = 0; v < v_block; ++v ) + for( u = 0; u < u_block; ++u ) + { + sum_value += orig[index + v*width*channels + u*channels]; + } + resampled[j*mip_width*channels + i*channels + c] = sum_value / block_area; + } + } + } + return 1; +} + +int + scale_image_RGB_to_NTSC_safe + ( + unsigned char* orig, + int width, int height, int channels + ) +{ + const float scale_lo = 16.0f - 0.499f; + const float scale_hi = 235.0f + 0.499f; + int i, j; + int nc = channels; + unsigned char scale_LUT[256]; + /* error check */ + if( (width < 1) || (height < 1) || + (channels < 1) || (orig == NULL) ) + { + /* nothing to do */ + return 0; + } + /* set up the scaling Look Up Table */ + for( i = 0; i < 256; ++i ) + { + scale_LUT[i] = (unsigned char)((scale_hi - scale_lo) * i / 255.0f + scale_lo); + } + /* for channels = 2 or 4, ignore the alpha component */ + nc -= 1 - (channels & 1); + /* OK, go through the image and scale any non-alpha components */ + for( i = 0; i < width*height*channels; i += channels ) + { + for( j = 0; j < nc; ++j ) + { + orig[i+j] = scale_LUT[orig[i+j]]; + } + } + return 1; +} + +unsigned char clamp_byte( int x ) { return ( (x) < 0 ? (0) : ( (x) > 255 ? 255 : (x) ) ); } + +/* + This function takes the RGB components of the image + and converts them into YCoCg. 3 components will be + re-ordered to CoYCg (for optimum DXT1 compression), + while 4 components will be ordered CoCgAY (for DXT5 + compression). +*/ +int + convert_RGB_to_YCoCg + ( + unsigned char* orig, + int width, int height, int channels + ) +{ + int i; + /* error check */ + if( (width < 1) || (height < 1) || + (channels < 3) || (channels > 4) || + (orig == NULL) ) + { + /* nothing to do */ + return -1; + } + /* do the conversion */ + if( channels == 3 ) + { + for( i = 0; i < width*height*3; i += 3 ) + { + int r = orig[i+0]; + int g = (orig[i+1] + 1) >> 1; + int b = orig[i+2]; + int tmp = (2 + r + b) >> 2; + /* Co */ + orig[i+0] = clamp_byte( 128 + ((r - b + 1) >> 1) ); + /* Y */ + orig[i+1] = clamp_byte( g + tmp ); + /* Cg */ + orig[i+2] = clamp_byte( 128 + g - tmp ); + } + } else + { + for( i = 0; i < width*height*4; i += 4 ) + { + int r = orig[i+0]; + int g = (orig[i+1] + 1) >> 1; + int b = orig[i+2]; + unsigned char a = orig[i+3]; + int tmp = (2 + r + b) >> 2; + /* Co */ + orig[i+0] = clamp_byte( 128 + ((r - b + 1) >> 1) ); + /* Cg */ + orig[i+1] = clamp_byte( 128 + g - tmp ); + /* Alpha */ + orig[i+2] = a; + /* Y */ + orig[i+3] = clamp_byte( g + tmp ); + } + } + /* done */ + return 0; +} + +/* + This function takes the YCoCg components of the image + and converts them into RGB. See above. +*/ +int + convert_YCoCg_to_RGB + ( + unsigned char* orig, + int width, int height, int channels + ) +{ + int i; + /* error check */ + if( (width < 1) || (height < 1) || + (channels < 3) || (channels > 4) || + (orig == NULL) ) + { + /* nothing to do */ + return -1; + } + /* do the conversion */ + if( channels == 3 ) + { + for( i = 0; i < width*height*3; i += 3 ) + { + int co = orig[i+0] - 128; + int y = orig[i+1]; + int cg = orig[i+2] - 128; + /* R */ + orig[i+0] = clamp_byte( y + co - cg ); + /* G */ + orig[i+1] = clamp_byte( y + cg ); + /* B */ + orig[i+2] = clamp_byte( y - co - cg ); + } + } else + { + for( i = 0; i < width*height*4; i += 4 ) + { + int co = orig[i+0] - 128; + int cg = orig[i+1] - 128; + unsigned char a = orig[i+2]; + int y = orig[i+3]; + /* R */ + orig[i+0] = clamp_byte( y + co - cg ); + /* G */ + orig[i+1] = clamp_byte( y + cg ); + /* B */ + orig[i+2] = clamp_byte( y - co - cg ); + /* A */ + orig[i+3] = a; + } + } + /* done */ + return 0; +} + +float +find_max_RGBE +( + unsigned char *image, + int width, int height +) +{ + float max_val = 0.0f; + unsigned char *img = image; + int i, j; + for( i = width * height; i > 0; --i ) + { + /* float scale = powf( 2.0f, img[3] - 128.0f ) / 255.0f; */ + float scale = ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 ); + for( j = 0; j < 3; ++j ) + { + if( img[j] * scale > max_val ) + { + max_val = img[j] * scale; + } + } + /* next pixel */ + img += 4; + } + return max_val; +} + +int +RGBE_to_RGBdivA +( + unsigned char *image, + int width, int height, + int rescale_to_max +) +{ + /* local variables */ + int i, iv; + unsigned char *img = image; + float scale = 1.0f; + /* error check */ + if( (!image) || (width < 1) || (height < 1) ) + { + return 0; + } + /* convert (note: no negative numbers, but 0.0 is possible) */ + if( rescale_to_max ) + { + scale = 255.0f / find_max_RGBE( image, width, height ); + } + for( i = width * height; i > 0; --i ) + { + /* decode this pixel, and find the max */ + float r,g,b,e, m; + /* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */ + e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 ); + r = e * img[0]; + g = e * img[1]; + b = e * img[2]; + m = (r > g) ? r : g; + m = (b > m) ? b : m; + /* and encode it into RGBdivA */ + iv = (m != 0.0f) ? (int)(255.0f / m) : 1.0f; + iv = (iv < 1) ? 1 : iv; + img[3] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * r + 0.5f); + img[0] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * g + 0.5f); + img[1] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * b + 0.5f); + img[2] = (iv > 255) ? 255 : iv; + /* and on to the next pixel */ + img += 4; + } + return 1; +} + +int +RGBE_to_RGBdivA2 +( + unsigned char *image, + int width, int height, + int rescale_to_max +) +{ + /* local variables */ + int i, iv; + unsigned char *img = image; + float scale = 1.0f; + /* error check */ + if( (!image) || (width < 1) || (height < 1) ) + { + return 0; + } + /* convert (note: no negative numbers, but 0.0 is possible) */ + if( rescale_to_max ) + { + scale = 255.0f * 255.0f / find_max_RGBE( image, width, height ); + } + for( i = width * height; i > 0; --i ) + { + /* decode this pixel, and find the max */ + float r,g,b,e, m; + /* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */ + e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 ); + r = e * img[0]; + g = e * img[1]; + b = e * img[2]; + m = (r > g) ? r : g; + m = (b > m) ? b : m; + /* and encode it into RGBdivA */ + iv = (m != 0.0f) ? (int)sqrtf( 255.0f * 255.0f / m ) : 1.0f; + iv = (iv < 1) ? 1 : iv; + img[3] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * img[3] * r / 255.0f + 0.5f); + img[0] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * img[3] * g / 255.0f + 0.5f); + img[1] = (iv > 255) ? 255 : iv; + iv = (int)(img[3] * img[3] * b / 255.0f + 0.5f); + img[2] = (iv > 255) ? 255 : iv; + /* and on to the next pixel */ + img += 4; + } + return 1; +} diff --git a/GrafikaProjekt/pliki/src/SOIL/image_helper.h b/GrafikaProjekt/pliki/src/SOIL/image_helper.h new file mode 100644 index 0000000..3fa2662 --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/image_helper.h @@ -0,0 +1,115 @@ +/* + Jonathan Dummer + + Image helper functions + + MIT license +*/ + +#ifndef HEADER_IMAGE_HELPER +#define HEADER_IMAGE_HELPER + +#ifdef __cplusplus +extern "C" { +#endif + +/** + This function upscales an image. + Not to be used to create MIPmaps, + but to make it square, + or to make it a power-of-two sized. +**/ +int + up_scale_image + ( + const unsigned char* const orig, + int width, int height, int channels, + unsigned char* resampled, + int resampled_width, int resampled_height + ); + +/** + This function downscales an image. + Used for creating MIPmaps, + the incoming image should be a + power-of-two sized. +**/ +int + mipmap_image + ( + const unsigned char* const orig, + int width, int height, int channels, + unsigned char* resampled, + int block_size_x, int block_size_y + ); + +/** + This function takes the RGB components of the image + and scales each channel from [0,255] to [16,235]. + This makes the colors "Safe" for display on NTSC + displays. Note that this is _NOT_ a good idea for + loading images like normal- or height-maps! +**/ +int + scale_image_RGB_to_NTSC_safe + ( + unsigned char* orig, + int width, int height, int channels + ); + +/** + This function takes the RGB components of the image + and converts them into YCoCg. 3 components will be + re-ordered to CoYCg (for optimum DXT1 compression), + while 4 components will be ordered CoCgAY (for DXT5 + compression). +**/ +int + convert_RGB_to_YCoCg + ( + unsigned char* orig, + int width, int height, int channels + ); + +/** + This function takes the YCoCg components of the image + and converts them into RGB. See above. +**/ +int + convert_YCoCg_to_RGB + ( + unsigned char* orig, + int width, int height, int channels + ); + +/** + Converts an HDR image from an array + of unsigned chars (RGBE) to RGBdivA + \return 0 if failed, otherwise returns 1 +**/ +int + RGBE_to_RGBdivA + ( + unsigned char *image, + int width, int height, + int rescale_to_max + ); + +/** + Converts an HDR image from an array + of unsigned chars (RGBE) to RGBdivA2 + \return 0 if failed, otherwise returns 1 +**/ +int + RGBE_to_RGBdivA2 + ( + unsigned char *image, + int width, int height, + int rescale_to_max + ); + +#ifdef __cplusplus +} +#endif + +#endif /* HEADER_IMAGE_HELPER */ diff --git a/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.c b/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.c new file mode 100644 index 0000000..bb088fc --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.c @@ -0,0 +1,3682 @@ +/* stbi-1.16 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c + when you control the images you're loading + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline (no JPEG progressive, no oddball channel decimations) + PNG non-interlaced + BMP non-1bpp, non-RLE + TGA (not sure what subset, if a subset) + PSD (composited view only, no extra channels) + HDR (radiance rgbE format) + writes BMP,TGA (define STBI_NO_WRITE to remove code) + decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code) + supports installable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) + + TODO: + stbi_info_* + + history: + 1.16 major bugfix - convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug; header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less + than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant +*/ + +#include "stb_image_aug.h" + +#ifndef STBI_NO_HDR +#include // ldexp +#include // strcmp +#endif + +#ifndef STBI_NO_STDIO +#include +#endif +#include +#include +#include +#include + +#ifndef _MSC_VER + #ifdef __cplusplus + #define __forceinline inline + #else + #define __forceinline + #endif +#endif + + +// implementation: +typedef unsigned char uint8; +typedef unsigned short uint16; +typedef signed short int16; +typedef unsigned int uint32; +typedef signed int int32; +typedef unsigned int uint; + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(uint32)==4]; + +#if defined(STBI_NO_STDIO) && !defined(STBI_NO_WRITE) +#define STBI_NO_WRITE +#endif + +#ifndef STBI_NO_DDS +#include "stbi_DDS_aug.h" +#endif + +// I (JLD) want full messages for SOIL +#define STBI_FAILURE_USERMSG 1 + +////////////////////////////////////////////////////////////////////////////// +// +// Generic API that works on all image types +// + +// this is not threadsafe +static char *failure_reason; + +char *stbi_failure_reason(void) +{ + return failure_reason; +} + +static int e(char *str) +{ + failure_reason = str; + return 0; +} + +#ifdef STBI_NO_FAILURE_STRINGS + #define e(x,y) 0 +#elif defined(STBI_FAILURE_USERMSG) + #define e(x,y) e(y) +#else + #define e(x,y) e(x) +#endif + +#define epf(x,y) ((float *) (e(x,y)?NULL:NULL)) +#define epuc(x,y) ((unsigned char *) (e(x,y)?NULL:NULL)) + +void stbi_image_free(void *retval_from_stbi_load) +{ + free(retval_from_stbi_load); +} + +#define MAX_LOADERS 32 +stbi_loader *loaders[MAX_LOADERS]; +static int max_loaders = 0; + +int stbi_register_loader(stbi_loader *loader) +{ + int i; + for (i=0; i < MAX_LOADERS; ++i) { + // already present? + if (loaders[i] == loader) + return 1; + // end of the list? + if (loaders[i] == NULL) { + loaders[i] = loader; + max_loaders = i+1; + return 1; + } + } + // no room for it + return 0; +} + +#ifndef STBI_NO_HDR +static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp); +static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_STDIO +unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = fopen(filename, "rb"); + unsigned char *result; + if (!f) return epuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +unsigned char *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + int i; + if (stbi_jpeg_test_file(f)) + return stbi_jpeg_load_from_file(f,x,y,comp,req_comp); + if (stbi_png_test_file(f)) + return stbi_png_load_from_file(f,x,y,comp,req_comp); + if (stbi_bmp_test_file(f)) + return stbi_bmp_load_from_file(f,x,y,comp,req_comp); + if (stbi_psd_test_file(f)) + return stbi_psd_load_from_file(f,x,y,comp,req_comp); + #ifndef STBI_NO_DDS + if (stbi_dds_test_file(f)) + return stbi_dds_load_from_file(f,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_HDR + if (stbi_hdr_test_file(f)) { + float *hdr = stbi_hdr_load_from_file(f, x,y,comp,req_comp); + return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + for (i=0; i < max_loaders; ++i) + if (loaders[i]->test_file(f)) + return loaders[i]->load_from_file(f,x,y,comp,req_comp); + // test tga last because it's a crappy test! + if (stbi_tga_test_file(f)) + return stbi_tga_load_from_file(f,x,y,comp,req_comp); + return epuc("unknown image type", "Image not of any known type, or corrupt"); +} +#endif + +unsigned char *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + int i; + if (stbi_jpeg_test_memory(buffer,len)) + return stbi_jpeg_load_from_memory(buffer,len,x,y,comp,req_comp); + if (stbi_png_test_memory(buffer,len)) + return stbi_png_load_from_memory(buffer,len,x,y,comp,req_comp); + if (stbi_bmp_test_memory(buffer,len)) + return stbi_bmp_load_from_memory(buffer,len,x,y,comp,req_comp); + if (stbi_psd_test_memory(buffer,len)) + return stbi_psd_load_from_memory(buffer,len,x,y,comp,req_comp); + #ifndef STBI_NO_DDS + if (stbi_dds_test_memory(buffer,len)) + return stbi_dds_load_from_memory(buffer,len,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_HDR + if (stbi_hdr_test_memory(buffer, len)) { + float *hdr = stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp); + return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + for (i=0; i < max_loaders; ++i) + if (loaders[i]->test_memory(buffer,len)) + return loaders[i]->load_from_memory(buffer,len,x,y,comp,req_comp); + // test tga last because it's a crappy test! + if (stbi_tga_test_memory(buffer,len)) + return stbi_tga_load_from_memory(buffer,len,x,y,comp,req_comp); + return epuc("unknown image type", "Image not of any known type, or corrupt"); +} + +#ifndef STBI_NO_HDR + +#ifndef STBI_NO_STDIO +float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = fopen(filename, "rb"); + float *result; + if (!f) return epf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi_hdr_test_file(f)) + return stbi_hdr_load_from_file(f,x,y,comp,req_comp); + #endif + data = stbi_load_from_file(f, x, y, comp, req_comp); + if (data) + return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return epf("unknown image type", "Image not of any known type, or corrupt"); +} +#endif + +float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *data; + #ifndef STBI_NO_HDR + if (stbi_hdr_test_memory(buffer, len)) + return stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp); + #endif + data = stbi_load_from_memory(buffer, len, x, y, comp, req_comp); + if (data) + return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return epf("unknown image type", "Image not of any known type, or corrupt"); +} +#endif + +// these is-hdr-or-not is defined independent of whether STBI_NO_HDR is +// defined, for API simplicity; if STBI_NO_HDR is defined, it always +// reports false! + +int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) +{ + #ifndef STBI_NO_HDR + return stbi_hdr_test_memory(buffer, len); + #else + return 0; + #endif +} + +#ifndef STBI_NO_STDIO +extern int stbi_is_hdr (char const *filename) +{ + FILE *f = fopen(filename, "rb"); + int result=0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +extern int stbi_is_hdr_from_file(FILE *f) +{ + #ifndef STBI_NO_HDR + return stbi_hdr_test_file(f); + #else + return 0; + #endif +} + +#endif + +// @TODO: get image dimensions & components without fully decoding +#ifndef STBI_NO_STDIO +extern int stbi_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif +extern int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); + +#ifndef STBI_NO_HDR +static float h2l_gamma_i=1.0f/2.2f, h2l_scale_i=1.0f; +static float l2h_gamma=2.2f, l2h_scale=1.0f; + +void stbi_hdr_to_ldr_gamma(float gamma) { h2l_gamma_i = 1/gamma; } +void stbi_hdr_to_ldr_scale(float scale) { h2l_scale_i = 1/scale; } + +void stbi_ldr_to_hdr_gamma(float gamma) { l2h_gamma = gamma; } +void stbi_ldr_to_hdr_scale(float scale) { l2h_scale = scale; } +#endif + + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum +{ + SCAN_load=0, + SCAN_type, + SCAN_header, +}; + +typedef struct +{ + uint32 img_x, img_y; + int img_n, img_out_n; + + #ifndef STBI_NO_STDIO + FILE *img_file; + #endif + uint8 *img_buffer, *img_buffer_end; +} stbi; + +#ifndef STBI_NO_STDIO +static void start_file(stbi *s, FILE *f) +{ + s->img_file = f; +} +#endif + +static void start_mem(stbi *s, uint8 const *buffer, int len) +{ +#ifndef STBI_NO_STDIO + s->img_file = NULL; +#endif + s->img_buffer = (uint8 *) buffer; + s->img_buffer_end = (uint8 *) buffer+len; +} + +__forceinline static int get8(stbi *s) +{ +#ifndef STBI_NO_STDIO + if (s->img_file) { + int c = fgetc(s->img_file); + return c == EOF ? 0 : c; + } +#endif + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + return 0; +} + +__forceinline static int at_eof(stbi *s) +{ +#ifndef STBI_NO_STDIO + if (s->img_file) + return feof(s->img_file); +#endif + return s->img_buffer >= s->img_buffer_end; +} + +__forceinline static uint8 get8u(stbi *s) +{ + return (uint8) get8(s); +} + +static void skip(stbi *s, int n) +{ +#ifndef STBI_NO_STDIO + if (s->img_file) + fseek(s->img_file, n, SEEK_CUR); + else +#endif + s->img_buffer += n; +} + +static int get16(stbi *s) +{ + int z = get8(s); + return (z << 8) + get8(s); +} + +static uint32 get32(stbi *s) +{ + uint32 z = get16(s); + return (z << 16) + get16(s); +} + +static int get16le(stbi *s) +{ + int z = get8(s); + return z + (get8(s) << 8); +} + +static uint32 get32le(stbi *s) +{ + uint32 z = get16le(s); + return z + (get16le(s) << 16); +} + +static void getn(stbi *s, stbi_uc *buffer, int n) +{ +#ifndef STBI_NO_STDIO + if (s->img_file) { + fread(buffer, 1, n, s->img_file); + return; + } +#endif + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; +} + +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static uint8 compute_y(int r, int g, int b) +{ + return (uint8) (((r*77) + (g*150) + (29*b)) >> 8); +} + +static unsigned char *convert_format(unsigned char *data, int img_n, int req_comp, uint x, uint y) +{ + int i,j; + unsigned char *good; + + if (req_comp == img_n) return data; + assert(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *) malloc(req_comp * x * y); + if (good == NULL) { + free(data); + return epuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + unsigned char *src = data + j * x * img_n ; + unsigned char *dest = good + j * x * req_comp; + + #define COMBO(a,b) ((a)*8+(b)) + #define CASE(a,b) case COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch(COMBO(img_n, req_comp)) { + CASE(1,2) dest[0]=src[0], dest[1]=255; break; + CASE(1,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(1,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; break; + CASE(2,1) dest[0]=src[0]; break; + CASE(2,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(2,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; break; + CASE(3,4) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; break; + CASE(3,1) dest[0]=compute_y(src[0],src[1],src[2]); break; + CASE(3,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = 255; break; + CASE(4,1) dest[0]=compute_y(src[0],src[1],src[2]); break; + CASE(4,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break; + CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break; + default: assert(0); + } + #undef CASE + } + + free(data); + return good; +} + +#ifndef STBI_NO_HDR +static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp) +{ + int i,k,n; + float *output = (float *) malloc(x * y * comp * sizeof(float)); + if (output == NULL) { free(data); return epf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + output[i*comp + k] = (float) pow(data[i*comp+k]/255.0f, l2h_gamma) * l2h_scale; + } + if (k < comp) output[i*comp + k] = data[i*comp+k]/255.0f; + } + free(data); + return output; +} + +#define float2int(x) ((int) (x)) +static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp) +{ + int i,k,n; + stbi_uc *output = (stbi_uc *) malloc(x * y * comp); + if (output == NULL) { free(data); return epuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + float z = (float) pow(data[i*comp+k]*h2l_scale_i, h2l_gamma_i) * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = float2int(z); + } + if (k < comp) { + float z = data[i*comp+k] * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = float2int(z); + } + } + free(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder (not actually fully baseline implementation) +// +// simple implementation +// - channel subsampling of at most 2 in each dimension +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - uses a lot of intermediate memory, could cache poorly +// - load http://nothings.org/remote/anemones.jpg 3 times on 2.8Ghz P4 +// stb_jpeg: 1.34 seconds (MSVC6, default release build) +// stb_jpeg: 1.06 seconds (MSVC6, processor = Pentium Pro) +// IJL11.dll: 1.08 seconds (compiled by intel) +// IJG 1998: 0.98 seconds (MSVC6, makefile provided by IJG) +// IJG 1998: 0.95 seconds (MSVC6, makefile + proc=PPro) + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct +{ + uint8 fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + uint16 code[256]; + uint8 values[256]; + uint8 size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} huffman; + +typedef struct +{ + #if STBI_SIMD + unsigned short dequant2[4][64]; + #endif + stbi s; + huffman huff_dc[4]; + huffman huff_ac[4]; + uint8 dequant[4][64]; + +// sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + +// definition of jpeg image component + struct + { + int id; + int h,v; + int tq; + int hd,ha; + int dc_pred; + + int x,y,w2,h2; + uint8 *data; + void *raw_data; + uint8 *linebuf; + } img_comp[4]; + + uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int scan_n, order[4]; + int restart_interval, todo; +} jpeg; + +static int build_huffman(huffman *h, int *count) +{ + int i,j,k=0,code; + // build size list for each symbol (from JPEG spec) + for (i=0; i < 16; ++i) + for (j=0; j < count[i]; ++j) + h->size[k++] = (uint8) (i+1); + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for(j=1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (uint16) (code++); + if (code-1 >= (1 << j)) return e("bad code lengths","Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16-j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i=0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS-s); + int m = 1 << (FAST_BITS-s); + for (j=0; j < m; ++j) { + h->fast[c+j] = (uint8) i; + } + } + } + return 1; +} + +static void grow_buffer_unsafe(jpeg *j) +{ + do { + int b = j->nomore ? 0 : get8(&j->s); + if (b == 0xff) { + int c = get8(&j->s); + if (c != 0) { + j->marker = (unsigned char) c; + j->nomore = 1; + return; + } + } + j->code_buffer = (j->code_buffer << 8) | b; + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static uint32 bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; + +// decode a jpeg huffman value from the bitstream +__forceinline static int decode(jpeg *j, huffman *h) +{ + unsigned int temp; + int c,k; + + if (j->code_bits < 16) grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (j->code_bits - FAST_BITS)) & ((1 << FAST_BITS)-1); + k = h->fast[c]; + if (k < 255) { + if (h->size[k] > j->code_bits) + return -1; + j->code_bits -= h->size[k]; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + if (j->code_bits < 16) + temp = (j->code_buffer << (16 - j->code_bits)) & 0xffff; + else + temp = (j->code_buffer >> (j->code_bits - 16)) & 0xffff; + for (k=FAST_BITS+1 ; ; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (j->code_bits - k)) & bmask[k]) + h->delta[k]; + assert((((j->code_buffer) >> (j->code_bits - h->size[c])) & bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + return h->values[c]; +} + +// combined JPEG 'receive' and JPEG 'extend', since baseline +// always extends everything it receives. +__forceinline static int extend_receive(jpeg *j, int n) +{ + unsigned int m = 1 << (n-1); + unsigned int k; + if (j->code_bits < n) grow_buffer_unsafe(j); + k = (j->code_buffer >> (j->code_bits - n)) & bmask[n]; + j->code_bits -= n; + // the following test is probably a random branch that won't + // predict well. I tried to table accelerate it but failed. + // maybe it's compiling as a conditional move? + if (k < m) + return (-1 << n) + k + 1; + else + return k; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static uint8 dezigzag[64+15] = +{ + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63 +}; + +// decode one 64-entry block-- +static int decode_block(jpeg *j, short data[64], huffman *hdc, huffman *hac, int b) +{ + int diff,dc,k; + int t = decode(j, hdc); + if (t < 0) return e("bad huffman code","Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data,0,64*sizeof(data[0])); + + diff = t ? extend_receive(j, t) : 0; + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + data[0] = (short) dc; + + // decode AC components, see JPEG spec + k = 1; + do { + int r,s; + int rs = decode(j, hac); + if (rs < 0) return e("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + data[dezigzag[k++]] = (short) extend_receive(j,s); + } + } while (k < 64); + return 1; +} + +// take a -128..127 value and clamp it and convert to 0..255 +__forceinline static uint8 clamp(int x) +{ + x += 128; + // trick to use a single test to catch both cases + if ((unsigned int) x > 255) { + if (x < 0) return 0; + if (x > 255) return 255; + } + return (uint8) x; +} + +#define f2f(x) (int) (((x) * 4096 + 0.5)) +#define fsh(x) ((x) << 12) + +// derived from jidctint -- DCT_ISLOW +#define IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ + int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2+p3) * f2f(0.5411961f); \ + t2 = p1 + p3*f2f(-1.847759065f); \ + t3 = p1 + p2*f2f( 0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = fsh(p2+p3); \ + t1 = fsh(p2-p3); \ + x0 = t0+t3; \ + x3 = t0-t3; \ + x1 = t1+t2; \ + x2 = t1-t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0+t2; \ + p4 = t1+t3; \ + p1 = t0+t3; \ + p2 = t1+t2; \ + p5 = (p3+p4)*f2f( 1.175875602f); \ + t0 = t0*f2f( 0.298631336f); \ + t1 = t1*f2f( 2.053119869f); \ + t2 = t2*f2f( 3.072711026f); \ + t3 = t3*f2f( 1.501321110f); \ + p1 = p5 + p1*f2f(-0.899976223f); \ + p2 = p5 + p2*f2f(-2.562915447f); \ + p3 = p3*f2f(-1.961570560f); \ + p4 = p4*f2f(-0.390180644f); \ + t3 += p1+p4; \ + t2 += p2+p3; \ + t1 += p2+p4; \ + t0 += p1+p3; + +#if !STBI_SIMD +// .344 seconds on 3*anemones.jpg +static void idct_block(uint8 *out, int out_stride, short data[64], uint8 *dequantize) +{ + int i,val[64],*v=val; + uint8 *o,*dq = dequantize; + short *d = data; + + // columns + for (i=0; i < 8; ++i,++d,++dq, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 + && d[40]==0 && d[48]==0 && d[56]==0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0] * dq[0] << 2; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + IDCT_1D(d[ 0]*dq[ 0],d[ 8]*dq[ 8],d[16]*dq[16],d[24]*dq[24], + d[32]*dq[32],d[40]*dq[40],d[48]*dq[48],d[56]*dq[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; x1 += 512; x2 += 512; x3 += 512; + v[ 0] = (x0+t3) >> 10; + v[56] = (x0-t3) >> 10; + v[ 8] = (x1+t2) >> 10; + v[48] = (x1-t2) >> 10; + v[16] = (x2+t1) >> 10; + v[40] = (x2-t1) >> 10; + v[24] = (x3+t0) >> 10; + v[32] = (x3-t0) >> 10; + } + } + + for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { + // no fast case since the first 1D IDCT spread components out + IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + x0 += 65536; x1 += 65536; x2 += 65536; x3 += 65536; + o[0] = clamp((x0+t3) >> 17); + o[7] = clamp((x0-t3) >> 17); + o[1] = clamp((x1+t2) >> 17); + o[6] = clamp((x1-t2) >> 17); + o[2] = clamp((x2+t1) >> 17); + o[5] = clamp((x2-t1) >> 17); + o[3] = clamp((x3+t0) >> 17); + o[4] = clamp((x3-t0) >> 17); + } +} +#else +static void idct_block(uint8 *out, int out_stride, short data[64], unsigned short *dequantize) +{ + int i,val[64],*v=val; + uint8 *o; + unsigned short *dq = dequantize; + short *d = data; + + // columns + for (i=0; i < 8; ++i,++d,++dq, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 + && d[40]==0 && d[48]==0 && d[56]==0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0] * dq[0] << 2; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + IDCT_1D(d[ 0]*dq[ 0],d[ 8]*dq[ 8],d[16]*dq[16],d[24]*dq[24], + d[32]*dq[32],d[40]*dq[40],d[48]*dq[48],d[56]*dq[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; x1 += 512; x2 += 512; x3 += 512; + v[ 0] = (x0+t3) >> 10; + v[56] = (x0-t3) >> 10; + v[ 8] = (x1+t2) >> 10; + v[48] = (x1-t2) >> 10; + v[16] = (x2+t1) >> 10; + v[40] = (x2-t1) >> 10; + v[24] = (x3+t0) >> 10; + v[32] = (x3-t0) >> 10; + } + } + + for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { + // no fast case since the first 1D IDCT spread components out + IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + x0 += 65536; x1 += 65536; x2 += 65536; x3 += 65536; + o[0] = clamp((x0+t3) >> 17); + o[7] = clamp((x0-t3) >> 17); + o[1] = clamp((x1+t2) >> 17); + o[6] = clamp((x1-t2) >> 17); + o[2] = clamp((x2+t1) >> 17); + o[5] = clamp((x2-t1) >> 17); + o[3] = clamp((x3+t0) >> 17); + o[4] = clamp((x3-t0) >> 17); + } +} +static stbi_idct_8x8 stbi_idct_installed = idct_block; + +extern void stbi_install_idct(stbi_idct_8x8 func) +{ + stbi_idct_installed = func; +} +#endif + +#define MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static uint8 get_marker(jpeg *j) +{ + uint8 x; + if (j->marker != MARKER_none) { x = j->marker; j->marker = MARKER_none; return x; } + x = get8u(&j->s); + if (x != 0xff) return MARKER_none; + while (x == 0xff) + x = get8u(&j->s); + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, reset the entropy decoder and +// the dc prediction +static void reset(jpeg *j) +{ + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = 0; + j->marker = MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int parse_entropy_coded_data(jpeg *z) +{ + reset(z); + if (z->scan_n == 1) { + int i,j; + #if STBI_SIMD + __declspec(align(16)) + #endif + short data[64]; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + if (!decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+z->img_comp[n].ha, n)) return 0; + #if STBI_SIMD + stbi_idct_installed(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data, z->dequant2[z->img_comp[n].tq]); + #else + idct_block(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data, z->dequant[z->img_comp[n].tq]); + #endif + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!RESTART(z->marker)) return 1; + reset(z); + } + } + } + } else { // interleaved! + int i,j,k,x,y; + short data[64]; + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x)*8; + int y2 = (j*z->img_comp[n].v + y)*8; + if (!decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+z->img_comp[n].ha, n)) return 0; + #if STBI_SIMD + stbi_idct_installed(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data, z->dequant2[z->img_comp[n].tq]); + #else + idct_block(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data, z->dequant[z->img_comp[n].tq]); + #endif + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!RESTART(z->marker)) return 1; + reset(z); + } + } + } + } + return 1; +} + +static int process_marker(jpeg *z, int m) +{ + int L; + switch (m) { + case MARKER_none: // no marker found + return e("expected marker","Corrupt JPEG"); + + case 0xC2: // SOF - progressive + return e("progressive jpeg","JPEG format not supported (progressive)"); + + case 0xDD: // DRI - specify restart interval + if (get16(&z->s) != 4) return e("bad DRI len","Corrupt JPEG"); + z->restart_interval = get16(&z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = get16(&z->s)-2; + while (L > 0) { + int q = get8(&z->s); + int p = q >> 4; + int t = q & 15,i; + if (p != 0) return e("bad DQT type","Corrupt JPEG"); + if (t > 3) return e("bad DQT table","Corrupt JPEG"); + for (i=0; i < 64; ++i) + z->dequant[t][dezigzag[i]] = get8u(&z->s); + #if STBI_SIMD + for (i=0; i < 64; ++i) + z->dequant2[t][i] = dequant[t][i]; + #endif + L -= 65; + } + return L==0; + + case 0xC4: // DHT - define huffman table + L = get16(&z->s)-2; + while (L > 0) { + uint8 *v; + int sizes[16],i,m=0; + int q = get8(&z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) return e("bad DHT header","Corrupt JPEG"); + for (i=0; i < 16; ++i) { + sizes[i] = get8(&z->s); + m += sizes[i]; + } + L -= 17; + if (tc == 0) { + if (!build_huffman(z->huff_dc+th, sizes)) return 0; + v = z->huff_dc[th].values; + } else { + if (!build_huffman(z->huff_ac+th, sizes)) return 0; + v = z->huff_ac[th].values; + } + for (i=0; i < m; ++i) + v[i] = get8u(&z->s); + L -= m; + } + return L==0; + } + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + skip(&z->s, get16(&z->s)-2); + return 1; + } + return 0; +} + +// after we see SOS +static int process_scan_header(jpeg *z) +{ + int i; + int Ls = get16(&z->s); + z->scan_n = get8(&z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s.img_n) return e("bad SOS component count","Corrupt JPEG"); + if (Ls != 6+2*z->scan_n) return e("bad SOS len","Corrupt JPEG"); + for (i=0; i < z->scan_n; ++i) { + int id = get8(&z->s), which; + int q = get8(&z->s); + for (which = 0; which < z->s.img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s.img_n) return 0; + z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return e("bad DC huff","Corrupt JPEG"); + z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return e("bad AC huff","Corrupt JPEG"); + z->order[i] = which; + } + if (get8(&z->s) != 0) return e("bad SOS","Corrupt JPEG"); + get8(&z->s); // should be 63, but might be 0 + if (get8(&z->s) != 0) return e("bad SOS","Corrupt JPEG"); + + return 1; +} + +static int process_frame_header(jpeg *z, int scan) +{ + stbi *s = &z->s; + int Lf,p,i,q, h_max=1,v_max=1,c; + Lf = get16(s); if (Lf < 11) return e("bad SOF len","Corrupt JPEG"); // JPEG + p = get8(s); if (p != 8) return e("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = get16(s); if (s->img_y == 0) return e("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = get16(s); if (s->img_x == 0) return e("0 width","Corrupt JPEG"); // JPEG requires + c = get8(s); + if (c != 3 && c != 1) return e("bad component count","Corrupt JPEG"); // JFIF requires + s->img_n = c; + for (i=0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8+3*s->img_n) return e("bad SOF len","Corrupt JPEG"); + + for (i=0; i < s->img_n; ++i) { + z->img_comp[i].id = get8(s); + if (z->img_comp[i].id != i+1) // JFIF requires + if (z->img_comp[i].id != i) // some version of jpegtran outputs non-JFIF-compliant files! + return e("bad component ID","Corrupt JPEG"); + q = get8(s); + z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return e("bad H","Corrupt JPEG"); + z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return e("bad V","Corrupt JPEG"); + z->img_comp[i].tq = get8(s); if (z->img_comp[i].tq > 3) return e("bad TQ","Corrupt JPEG"); + } + + if (scan != SCAN_load) return 1; + + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return e("too large", "Image too large to decode"); + + for (i=0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; + + for (i=0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].raw_data = malloc(z->img_comp[i].w2 * z->img_comp[i].h2+15); + if (z->img_comp[i].raw_data == NULL) { + for(--i; i >= 0; --i) { + free(z->img_comp[i].raw_data); + z->img_comp[i].data = NULL; + } + return e("outofmem", "Out of memory"); + } + // align blocks for installable-idct using mmx/sse + z->img_comp[i].data = (uint8*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); + z->img_comp[i].linebuf = NULL; + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define DNL(x) ((x) == 0xdc) +#define SOI(x) ((x) == 0xd8) +#define EOI(x) ((x) == 0xd9) +#define SOF(x) ((x) == 0xc0 || (x) == 0xc1) +#define SOS(x) ((x) == 0xda) + +static int decode_jpeg_header(jpeg *z, int scan) +{ + int m; + z->marker = MARKER_none; // initialize cached marker to empty + m = get_marker(z); + if (!SOI(m)) return e("no SOI","Corrupt JPEG"); + if (scan == SCAN_type) return 1; + m = get_marker(z); + while (!SOF(m)) { + if (!process_marker(z,m)) return 0; + m = get_marker(z); + while (m == MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (at_eof(&z->s)) return e("no SOF", "Corrupt JPEG"); + m = get_marker(z); + } + } + if (!process_frame_header(z, scan)) return 0; + return 1; +} + +static int decode_jpeg_image(jpeg *j) +{ + int m; + j->restart_interval = 0; + if (!decode_jpeg_header(j, SCAN_load)) return 0; + m = get_marker(j); + while (!EOI(m)) { + if (SOS(m)) { + if (!process_scan_header(j)) return 0; + if (!parse_entropy_coded_data(j)) return 0; + } else { + if (!process_marker(j, m)) return 0; + } + m = get_marker(j); + } + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef uint8 *(*resample_row_func)(uint8 *out, uint8 *in0, uint8 *in1, + int w, int hs); + +#define div4(x) ((uint8) ((x) >> 2)) + +static uint8 *resample_row_1(uint8 *out, uint8 *in_near, uint8 *in_far, int w, int hs) +{ + return in_near; +} + +static uint8* resample_row_v_2(uint8 *out, uint8 *in_near, uint8 *in_far, int w, int hs) +{ + // need to generate two samples vertically for every one in input + int i; + for (i=0; i < w; ++i) + out[i] = div4(3*in_near[i] + in_far[i] + 2); + return out; +} + +static uint8* resample_row_h_2(uint8 *out, uint8 *in_near, uint8 *in_far, int w, int hs) +{ + // need to generate two samples horizontally for every one in input + int i; + uint8 *input = in_near; + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = div4(input[0]*3 + input[1] + 2); + for (i=1; i < w-1; ++i) { + int n = 3*input[i]+2; + out[i*2+0] = div4(n+input[i-1]); + out[i*2+1] = div4(n+input[i+1]); + } + out[i*2+0] = div4(input[w-2]*3 + input[w-1] + 2); + out[i*2+1] = input[w-1]; + return out; +} + +#define div16(x) ((uint8) ((x) >> 4)) + +static uint8 *resample_row_hv_2(uint8 *out, uint8 *in_near, uint8 *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i,t0,t1; + if (w == 1) { + out[0] = out[1] = div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + out[0] = div4(t1+2); + for (i=1; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = div16(3*t0 + t1 + 8); + out[i*2 ] = div16(3*t1 + t0 + 8); + } + out[w*2-1] = div4(t1+2); + return out; +} + +static uint8 *resample_row_generic(uint8 *out, uint8 *in_near, uint8 *in_far, int w, int hs) +{ + // resample with nearest-neighbor + int i,j; + for (i=0; i < w; ++i) + for (j=0; j < hs; ++j) + out[i*hs+j] = in_near[i]; + return out; +} + +#define float2fixed(x) ((int) ((x) * 65536 + 0.5)) + +// 0.38 seconds on 3*anemones.jpg (0.25 with processor = Pro) +// VC6 without processor=Pro is generating multiple LEAs per multiply! +static void YCbCr_to_RGB_row(uint8 *out, uint8 *y, uint8 *pcb, uint8 *pcr, int count, int step) +{ + int i; + for (i=0; i < count; ++i) { + int y_fixed = (y[i] << 16) + 32768; // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr*float2fixed(1.40200f); + g = y_fixed - cr*float2fixed(0.71414f) - cb*float2fixed(0.34414f); + b = y_fixed + cb*float2fixed(1.77200f); + r >>= 16; + g >>= 16; + b >>= 16; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (uint8)r; + out[1] = (uint8)g; + out[2] = (uint8)b; + out[3] = 255; + out += step; + } +} + +#if STBI_SIMD +static stbi_YCbCr_to_RGB_run stbi_YCbCr_installed = YCbCr_to_RGB_row; + +void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func) +{ + stbi_YCbCr_installed = func; +} +#endif + + +// clean up the temporary component buffers +static void cleanup_jpeg(jpeg *j) +{ + int i; + for (i=0; i < j->s.img_n; ++i) { + if (j->img_comp[i].data) { + free(j->img_comp[i].raw_data); + j->img_comp[i].data = NULL; + } + if (j->img_comp[i].linebuf) { + free(j->img_comp[i].linebuf); + j->img_comp[i].linebuf = NULL; + } + } +} + +typedef struct +{ + resample_row_func resample; + uint8 *line0,*line1; + int hs,vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi_resample; + +static uint8 *load_jpeg_image(jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) +{ + int n, decode_n; + // validate req_comp + if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error"); + z->s.img_n = 0; + + // load a jpeg image from whichever source + if (!decode_jpeg_image(z)) { cleanup_jpeg(z); return NULL; } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s.img_n; + + if (z->s.img_n == 3 && n < 3) + decode_n = 1; + else + decode_n = z->s.img_n; + + // resample and color-convert + { + int k; + uint i,j; + uint8 *output; + uint8 *coutput[4]; + + stbi_resample res_comp[4]; + + for (k=0; k < decode_n; ++k) { + stbi_resample *r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (uint8 *) malloc(z->s.img_x + 3); + if (!z->img_comp[k].linebuf) { cleanup_jpeg(z); return epuc("outofmem", "Out of memory"); } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s.img_x + r->hs-1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) r->resample = resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) r->resample = resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) r->resample = resample_row_hv_2; + else r->resample = resample_row_generic; + } + + // can't error after this so, this is safe + output = (uint8 *) malloc(n * z->s.img_x * z->s.img_y + 1); + if (!output) { cleanup_jpeg(z); return epuc("outofmem", "Out of memory"); } + + // now go ahead and resample + for (j=0; j < z->s.img_y; ++j) { + uint8 *out = output + n * z->s.img_x * j; + for (k=0; k < decode_n; ++k) { + stbi_resample *r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, + y_bot ? r->line1 : r->line0, + y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + uint8 *y = coutput[0]; + if (z->s.img_n == 3) { + #if STBI_SIMD + stbi_YCbCr_installed(out, y, coutput[1], coutput[2], z->s.img_x, n); + #else + YCbCr_to_RGB_row(out, y, coutput[1], coutput[2], z->s.img_x, n); + #endif + } else + for (i=0; i < z->s.img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + uint8 *y = coutput[0]; + if (n == 1) + for (i=0; i < z->s.img_x; ++i) out[i] = y[i]; + else + for (i=0; i < z->s.img_x; ++i) *out++ = y[i], *out++ = 255; + } + } + cleanup_jpeg(z); + *out_x = z->s.img_x; + *out_y = z->s.img_y; + if (comp) *comp = z->s.img_n; // report original components, not output + return output; + } +} + +#ifndef STBI_NO_STDIO +unsigned char *stbi_jpeg_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + jpeg j; + start_file(&j.s, f); + return load_jpeg_image(&j, x,y,comp,req_comp); +} + +unsigned char *stbi_jpeg_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_jpeg_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return data; +} +#endif + +unsigned char *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + jpeg j; + start_mem(&j.s, buffer,len); + return load_jpeg_image(&j, x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +int stbi_jpeg_test_file(FILE *f) +{ + int n,r; + jpeg j; + n = ftell(f); + start_file(&j.s, f); + r = decode_jpeg_header(&j, SCAN_type); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_jpeg_test_memory(stbi_uc const *buffer, int len) +{ + jpeg j; + start_mem(&j.s, buffer,len); + return decode_jpeg_header(&j, SCAN_type); +} + +// @TODO: +#ifndef STBI_NO_STDIO +extern int stbi_jpeg_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif +extern int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define ZFAST_BITS 9 // accelerate all cases in default tables +#define ZFAST_MASK ((1 << ZFAST_BITS) - 1) + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct +{ + uint16 fast[1 << ZFAST_BITS]; + uint16 firstcode[16]; + int maxcode[17]; + uint16 firstsymbol[16]; + uint8 size[288]; + uint16 value[288]; +} zhuffman; + +__forceinline static int bitreverse16(int n) +{ + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +__forceinline static int bit_reverse(int v, int bits) +{ + assert(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return bitreverse16(v) >> (16-bits); +} + +static int zbuild_huffman(zhuffman *z, uint8 *sizelist, int num) +{ + int i,k=0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 255, sizeof(z->fast)); + for (i=0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i=1; i < 16; ++i) + assert(sizes[i] <= (1 << i)); + code = 0; + for (i=1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (uint16) code; + z->firstsymbol[i] = (uint16) k; + code = (code + sizes[i]); + if (sizes[i]) + if (code-1 >= (1 << i)) return e("bad codelengths","Corrupt JPEG"); + z->maxcode[i] = code << (16-i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i=0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + z->size[c] = (uint8)s; + z->value[c] = (uint16)i; + if (s <= ZFAST_BITS) { + int k = bit_reverse(next_code[s],s); + while (k < (1 << ZFAST_BITS)) { + z->fast[k] = (uint16) c; + k += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct +{ + uint8 *zbuffer, *zbuffer_end; + int num_bits; + uint32 code_buffer; + + char *zout; + char *zout_start; + char *zout_end; + int z_expandable; + + zhuffman z_length, z_distance; +} zbuf; + +__forceinline static int zget8(zbuf *z) +{ + if (z->zbuffer >= z->zbuffer_end) return 0; + return *z->zbuffer++; +} + +static void fill_bits(zbuf *z) +{ + do { + assert(z->code_buffer < (1U << z->num_bits)); + z->code_buffer |= zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +__forceinline static unsigned int zreceive(zbuf *z, int n) +{ + unsigned int k; + if (z->num_bits < n) fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +__forceinline static int zhuffman_decode(zbuf *a, zhuffman *z) +{ + int b,s,k; + if (a->num_bits < 16) fill_bits(a); + b = z->fast[a->code_buffer & ZFAST_MASK]; + if (b < 0xffff) { + s = z->size[b]; + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; + } + + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = bit_reverse(a->code_buffer, 16); + for (s=ZFAST_BITS+1; ; ++s) + if (k < z->maxcode[s]) + break; + if (s == 16) return -1; // invalid code! + // code size is s, so: + b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; + assert(z->size[b] == s); + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +static int expand(zbuf *z, int n) // need to make room for n bytes +{ + char *q; + int cur, limit; + if (!z->z_expandable) return e("output buffer limit","Corrupt PNG"); + cur = (int) (z->zout - z->zout_start); + limit = (int) (z->zout_end - z->zout_start); + while (cur + n > limit) + limit *= 2; + q = (char *) realloc(z->zout_start, limit); + if (q == NULL) return e("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static int length_base[31] = { + 3,4,5,6,7,8,9,10,11,13, + 15,17,19,23,27,31,35,43,51,59, + 67,83,99,115,131,163,195,227,258,0,0 }; + +static int length_extra[31]= +{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; + +static int dist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, +257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; + +static int dist_extra[32] = +{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; + +static int parse_huffman_block(zbuf *a) +{ + for(;;) { + int z = zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) return e("bad huffman code","Corrupt PNG"); // error in huffman codes + if (a->zout >= a->zout_end) if (!expand(a, 1)) return 0; + *a->zout++ = (char) z; + } else { + uint8 *p; + int len,dist; + if (z == 256) return 1; + z -= 257; + len = length_base[z]; + if (length_extra[z]) len += zreceive(a, length_extra[z]); + z = zhuffman_decode(a, &a->z_distance); + if (z < 0) return e("bad huffman code","Corrupt PNG"); + dist = dist_base[z]; + if (dist_extra[z]) dist += zreceive(a, dist_extra[z]); + if (a->zout - a->zout_start < dist) return e("bad dist","Corrupt PNG"); + if (a->zout + len > a->zout_end) if (!expand(a, len)) return 0; + p = (uint8 *) (a->zout - dist); + while (len--) + *a->zout++ = *p++; + } + } +} + +static int compute_huffman_codes(zbuf *a) +{ + static uint8 length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; + static zhuffman z_codelength; // static just to save stack space + uint8 lencodes[286+32+137];//padding for maximum single op + uint8 codelength_sizes[19]; + int i,n; + + int hlit = zreceive(a,5) + 257; + int hdist = zreceive(a,5) + 1; + int hclen = zreceive(a,4) + 4; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i=0; i < hclen; ++i) { + int s = zreceive(a,3); + codelength_sizes[length_dezigzag[i]] = (uint8) s; + } + if (!zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; + + n = 0; + while (n < hlit + hdist) { + int c = zhuffman_decode(a, &z_codelength); + assert(c >= 0 && c < 19); + if (c < 16) + lencodes[n++] = (uint8) c; + else if (c == 16) { + c = zreceive(a,2)+3; + memset(lencodes+n, lencodes[n-1], c); + n += c; + } else if (c == 17) { + c = zreceive(a,3)+3; + memset(lencodes+n, 0, c); + n += c; + } else { + assert(c == 18); + c = zreceive(a,7)+11; + memset(lencodes+n, 0, c); + n += c; + } + } + if (n != hlit+hdist) return e("bad codelengths","Corrupt PNG"); + if (!zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; + if (!zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; + return 1; +} + +static int parse_uncompressed_block(zbuf *a) +{ + uint8 header[4]; + int len,nlen,k; + if (a->num_bits & 7) + zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (uint8) (a->code_buffer & 255); // wtf this warns? + a->code_buffer >>= 8; + a->num_bits -= 8; + } + assert(a->num_bits == 0); + // now fill header the normal way + while (k < 4) + header[k++] = (uint8) zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) return e("zlib corrupt","Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) return e("read past buffer","Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!expand(a, len)) return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int parse_zlib_header(zbuf *a) +{ + int cmf = zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = zget8(a); + if ((cmf*256+flg) % 31 != 0) return e("bad zlib header","Corrupt PNG"); // zlib spec + if (flg & 32) return e("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) return e("bad compression","Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +// @TODO: should statically initialize these for optimal thread safety +static uint8 default_length[288], default_distance[32]; +static void init_defaults(void) +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) default_length[i] = 8; + for ( ; i <= 255; ++i) default_length[i] = 9; + for ( ; i <= 279; ++i) default_length[i] = 7; + for ( ; i <= 287; ++i) default_length[i] = 8; + + for (i=0; i <= 31; ++i) default_distance[i] = 5; +} + +static int parse_zlib(zbuf *a, int parse_header) +{ + int final, type; + if (parse_header) + if (!parse_zlib_header(a)) return 0; + a->num_bits = 0; + a->code_buffer = 0; + do { + final = zreceive(a,1); + type = zreceive(a,2); + if (type == 0) { + if (!parse_uncompressed_block(a)) return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!default_distance[31]) init_defaults(); + if (!zbuild_huffman(&a->z_length , default_length , 288)) return 0; + if (!zbuild_huffman(&a->z_distance, default_distance, 32)) return 0; + } else { + if (!compute_huffman_codes(a)) return 0; + } + if (!parse_huffman_block(a)) return 0; + } + } while (!final); + return 1; +} + +static int do_zlib(zbuf *a, char *obuf, int olen, int exp, int parse_header) +{ + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return parse_zlib(a, parse_header); +} + +char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) +{ + zbuf a; + char *p = (char *) malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (uint8 *) buffer; + a.zbuffer_end = (uint8 *) buffer + len; + if (do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + free(a.zout_start); + return NULL; + } +} + +char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) +{ + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) +{ + zbuf a; + a.zbuffer = (uint8 *) ibuffer; + a.zbuffer_end = (uint8 *) ibuffer + ilen; + if (do_zlib(&a, obuffer, olen, 0, 1)) + return (int) (a.zout - a.zout_start); + else + return -1; +} + +char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) +{ + zbuf a; + char *p = (char *) malloc(16384); + if (p == NULL) return NULL; + a.zbuffer = (uint8 *) buffer; + a.zbuffer_end = (uint8 *) buffer+len; + if (do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + free(a.zout_start); + return NULL; + } +} + +int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) +{ + zbuf a; + a.zbuffer = (uint8 *) ibuffer; + a.zbuffer_end = (uint8 *) ibuffer + ilen; + if (do_zlib(&a, obuffer, olen, 0, 0)) + return (int) (a.zout - a.zout_start); + else + return -1; +} + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + + +typedef struct +{ + uint32 length; + uint32 type; +} chunk; + +#define PNG_TYPE(a,b,c,d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) + +static chunk get_chunk_header(stbi *s) +{ + chunk c; + c.length = get32(s); + c.type = get32(s); + return c; +} + +static int check_png_header(stbi *s) +{ + static uint8 png_sig[8] = { 137,80,78,71,13,10,26,10 }; + int i; + for (i=0; i < 8; ++i) + if (get8(s) != png_sig[i]) return e("bad png sig","Not a PNG"); + return 1; +} + +typedef struct +{ + stbi s; + uint8 *idata, *expanded, *out; +} png; + + +enum { + F_none=0, F_sub=1, F_up=2, F_avg=3, F_paeth=4, + F_avg_first, F_paeth_first, +}; + +static uint8 first_row_filter[5] = +{ + F_none, F_sub, F_none, F_avg_first, F_paeth_first +}; + +static int paeth(int a, int b, int c) +{ + int p = a + b - c; + int pa = abs(p-a); + int pb = abs(p-b); + int pc = abs(p-c); + if (pa <= pb && pa <= pc) return a; + if (pb <= pc) return b; + return c; +} + +// create the png data from post-deflated data +static int create_png_image(png *a, uint8 *raw, uint32 raw_len, int out_n) +{ + stbi *s = &a->s; + uint32 i,j,stride = s->img_x*out_n; + int k; + int img_n = s->img_n; // copy it into a local for later + assert(out_n == s->img_n || out_n == s->img_n+1); + a->out = (uint8 *) malloc(s->img_x * s->img_y * out_n); + if (!a->out) return e("outofmem", "Out of memory"); + if (raw_len != (img_n * s->img_x + 1) * s->img_y) return e("not enough pixels","Corrupt PNG"); + for (j=0; j < s->img_y; ++j) { + uint8 *cur = a->out + stride*j; + uint8 *prior = cur - stride; + int filter = *raw++; + if (filter > 4) return e("invalid filter","Corrupt PNG"); + // if first row, use special filter that doesn't sample previous row + if (j == 0) filter = first_row_filter[filter]; + // handle first pixel explicitly + for (k=0; k < img_n; ++k) { + switch(filter) { + case F_none : cur[k] = raw[k]; break; + case F_sub : cur[k] = raw[k]; break; + case F_up : cur[k] = raw[k] + prior[k]; break; + case F_avg : cur[k] = raw[k] + (prior[k]>>1); break; + case F_paeth : cur[k] = (uint8) (raw[k] + paeth(0,prior[k],0)); break; + case F_avg_first : cur[k] = raw[k]; break; + case F_paeth_first: cur[k] = raw[k]; break; + } + } + if (img_n != out_n) cur[img_n] = 255; + raw += img_n; + cur += out_n; + prior += out_n; + // this is a little gross, so that we don't switch per-pixel or per-component + if (img_n == out_n) { + #define CASE(f) \ + case f: \ + for (i=s->img_x-1; i >= 1; --i, raw+=img_n,cur+=img_n,prior+=img_n) \ + for (k=0; k < img_n; ++k) + switch(filter) { + CASE(F_none) cur[k] = raw[k]; break; + CASE(F_sub) cur[k] = raw[k] + cur[k-img_n]; break; + CASE(F_up) cur[k] = raw[k] + prior[k]; break; + CASE(F_avg) cur[k] = raw[k] + ((prior[k] + cur[k-img_n])>>1); break; + CASE(F_paeth) cur[k] = (uint8) (raw[k] + paeth(cur[k-img_n],prior[k],prior[k-img_n])); break; + CASE(F_avg_first) cur[k] = raw[k] + (cur[k-img_n] >> 1); break; + CASE(F_paeth_first) cur[k] = (uint8) (raw[k] + paeth(cur[k-img_n],0,0)); break; + } + #undef CASE + } else { + assert(img_n+1 == out_n); + #define CASE(f) \ + case f: \ + for (i=s->img_x-1; i >= 1; --i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \ + for (k=0; k < img_n; ++k) + switch(filter) { + CASE(F_none) cur[k] = raw[k]; break; + CASE(F_sub) cur[k] = raw[k] + cur[k-out_n]; break; + CASE(F_up) cur[k] = raw[k] + prior[k]; break; + CASE(F_avg) cur[k] = raw[k] + ((prior[k] + cur[k-out_n])>>1); break; + CASE(F_paeth) cur[k] = (uint8) (raw[k] + paeth(cur[k-out_n],prior[k],prior[k-out_n])); break; + CASE(F_avg_first) cur[k] = raw[k] + (cur[k-out_n] >> 1); break; + CASE(F_paeth_first) cur[k] = (uint8) (raw[k] + paeth(cur[k-out_n],0,0)); break; + } + #undef CASE + } + } + return 1; +} + +static int compute_transparency(png *z, uint8 tc[3], int out_n) +{ + stbi *s = &z->s; + uint32 i, pixel_count = s->img_x * s->img_y; + uint8 *p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + assert(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i=0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i=0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int expand_palette(png *a, uint8 *palette, int len, int pal_img_n) +{ + uint32 i, pixel_count = a->s.img_x * a->s.img_y; + uint8 *p, *temp_out, *orig = a->out; + + p = (uint8 *) malloc(pixel_count * pal_img_n); + if (p == NULL) return e("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p += 3; + } + } else { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p[3] = palette[n+3]; + p += 4; + } + } + free(a->out); + a->out = temp_out; + return 1; +} + +static int parse_png_file(png *z, int scan, int req_comp) +{ + uint8 palette[1024], pal_img_n=0; + uint8 has_trans=0, tc[3]; + uint32 ioff=0, idata_limit=0, i, pal_len=0; + int first=1,k; + stbi *s = &z->s; + + if (!check_png_header(s)) return 0; + + if (scan == SCAN_type) return 1; + + for(;;first=0) { + chunk c = get_chunk_header(s); + if (first && c.type != PNG_TYPE('I','H','D','R')) + return e("first not IHDR","Corrupt PNG"); + switch (c.type) { + case PNG_TYPE('I','H','D','R'): { + int depth,color,interlace,comp,filter; + if (!first) return e("multiple IHDR","Corrupt PNG"); + if (c.length != 13) return e("bad IHDR len","Corrupt PNG"); + s->img_x = get32(s); if (s->img_x > (1 << 24)) return e("too large","Very large image (corrupt?)"); + s->img_y = get32(s); if (s->img_y > (1 << 24)) return e("too large","Very large image (corrupt?)"); + depth = get8(s); if (depth != 8) return e("8bit only","PNG not supported: 8-bit only"); + color = get8(s); if (color > 6) return e("bad ctype","Corrupt PNG"); + if (color == 3) pal_img_n = 3; else if (color & 1) return e("bad ctype","Corrupt PNG"); + comp = get8(s); if (comp) return e("bad comp method","Corrupt PNG"); + filter= get8(s); if (filter) return e("bad filter method","Corrupt PNG"); + interlace = get8(s); if (interlace) return e("interlaced","PNG not supported: interlaced mode"); + if (!s->img_x || !s->img_y) return e("0-pixel image","Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return e("too large", "Image too large to decode"); + if (scan == SCAN_header) return 1; + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) return e("too large","Corrupt PNG"); + // if SCAN_header, have to scan to see if we have a tRNS + } + break; + } + + case PNG_TYPE('P','L','T','E'): { + if (c.length > 256*3) return e("invalid PLTE","Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) return e("invalid PLTE","Corrupt PNG"); + for (i=0; i < pal_len; ++i) { + palette[i*4+0] = get8u(s); + palette[i*4+1] = get8u(s); + palette[i*4+2] = get8u(s); + palette[i*4+3] = 255; + } + break; + } + + case PNG_TYPE('t','R','N','S'): { + if (z->idata) return e("tRNS after IDAT","Corrupt PNG"); + if (pal_img_n) { + if (scan == SCAN_header) { s->img_n = 4; return 1; } + if (pal_len == 0) return e("tRNS before PLTE","Corrupt PNG"); + if (c.length > pal_len) return e("bad tRNS len","Corrupt PNG"); + pal_img_n = 4; + for (i=0; i < c.length; ++i) + palette[i*4+3] = get8u(s); + } else { + if (!(s->img_n & 1)) return e("tRNS with alpha","Corrupt PNG"); + if (c.length != (uint32) s->img_n*2) return e("bad tRNS len","Corrupt PNG"); + has_trans = 1; + for (k=0; k < s->img_n; ++k) + tc[k] = (uint8) get16(s); // non 8-bit images will be larger + } + break; + } + + case PNG_TYPE('I','D','A','T'): { + if (pal_img_n && !pal_len) return e("no PLTE","Corrupt PNG"); + if (scan == SCAN_header) { s->img_n = pal_img_n; return 1; } + if (ioff + c.length > idata_limit) { + uint8 *p; + if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + p = (uint8 *) realloc(z->idata, idata_limit); if (p == NULL) return e("outofmem", "Out of memory"); + z->idata = p; + } + #ifndef STBI_NO_STDIO + if (s->img_file) + { + if (fread(z->idata+ioff,1,c.length,s->img_file) != c.length) return e("outofdata","Corrupt PNG"); + } + else + #endif + { + memcpy(z->idata+ioff, s->img_buffer, c.length); + s->img_buffer += c.length; + } + ioff += c.length; + break; + } + + case PNG_TYPE('I','E','N','D'): { + uint32 raw_len; + if (scan != SCAN_load) return 1; + if (z->idata == NULL) return e("no IDAT","Corrupt PNG"); + z->expanded = (uint8 *) stbi_zlib_decode_malloc((char *) z->idata, ioff, (int *) &raw_len); + if (z->expanded == NULL) return 0; // zlib should set error + free(z->idata); z->idata = NULL; + if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n+1; + else + s->img_out_n = s->img_n; + if (!create_png_image(z, z->expanded, raw_len, s->img_out_n)) return 0; + if (has_trans) + if (!compute_transparency(z, tc, s->img_out_n)) return 0; + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) s->img_out_n = req_comp; + if (!expand_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } + free(z->expanded); z->expanded = NULL; + return 1; + } + + default: + // if critical, fail + if ((c.type & (1 << 29)) == 0) { + #ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX chunk not known"; + invalid_chunk[0] = (uint8) (c.type >> 24); + invalid_chunk[1] = (uint8) (c.type >> 16); + invalid_chunk[2] = (uint8) (c.type >> 8); + invalid_chunk[3] = (uint8) (c.type >> 0); + #endif + return e(invalid_chunk, "PNG not supported: unknown chunk type"); + } + skip(s, c.length); + break; + } + // end of chunk, read and skip CRC + get32(s); + } +} + +static unsigned char *do_png(png *p, int *x, int *y, int *n, int req_comp) +{ + unsigned char *result=NULL; + p->expanded = NULL; + p->idata = NULL; + p->out = NULL; + if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error"); + if (parse_png_file(p, SCAN_load, req_comp)) { + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s.img_out_n) { + result = convert_format(result, p->s.img_out_n, req_comp, p->s.img_x, p->s.img_y); + p->s.img_out_n = req_comp; + if (result == NULL) return result; + } + *x = p->s.img_x; + *y = p->s.img_y; + if (n) *n = p->s.img_n; + } + free(p->out); p->out = NULL; + free(p->expanded); p->expanded = NULL; + free(p->idata); p->idata = NULL; + + return result; +} + +#ifndef STBI_NO_STDIO +unsigned char *stbi_png_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + png p; + start_file(&p.s, f); + return do_png(&p, x,y,comp,req_comp); +} + +unsigned char *stbi_png_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_png_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return data; +} +#endif + +unsigned char *stbi_png_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + png p; + start_mem(&p.s, buffer,len); + return do_png(&p, x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +int stbi_png_test_file(FILE *f) +{ + png p; + int n,r; + n = ftell(f); + start_file(&p.s, f); + r = parse_png_file(&p, SCAN_type,STBI_default); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_png_test_memory(stbi_uc const *buffer, int len) +{ + png p; + start_mem(&p.s, buffer, len); + return parse_png_file(&p, SCAN_type,STBI_default); +} + +// TODO: load header from png +#ifndef STBI_NO_STDIO +extern int stbi_png_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif +extern int stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); + +// Microsoft/Windows BMP image + +static int bmp_test(stbi *s) +{ + int sz; + if (get8(s) != 'B') return 0; + if (get8(s) != 'M') return 0; + get32le(s); // discard filesize + get16le(s); // discard reserved + get16le(s); // discard reserved + get32le(s); // discard data offset + sz = get32le(s); + if (sz == 12 || sz == 40 || sz == 56 || sz == 108) return 1; + return 0; +} + +#ifndef STBI_NO_STDIO +int stbi_bmp_test_file (FILE *f) +{ + stbi s; + int r,n = ftell(f); + start_file(&s,f); + r = bmp_test(&s); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_bmp_test_memory (stbi_uc const *buffer, int len) +{ + stbi s; + start_mem(&s, buffer, len); + return bmp_test(&s); +} + +// returns 0..31 for the highest set bit +static int high_bit(unsigned int z) +{ + int n=0; + if (z == 0) return -1; + if (z >= 0x10000) n += 16, z >>= 16; + if (z >= 0x00100) n += 8, z >>= 8; + if (z >= 0x00010) n += 4, z >>= 4; + if (z >= 0x00004) n += 2, z >>= 2; + if (z >= 0x00002) n += 1, z >>= 1; + return n; +} + +static int bitcount(unsigned int a) +{ + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +static int shiftsigned(int v, int shift, int bits) +{ + int result; + int z=0; + + if (shift < 0) v <<= -shift; + else v >>= shift; + result = v; + + z = bits; + while (z < 8) { + result += v >> z; + z += bits; + } + return result; +} + +static stbi_uc *bmp_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + uint8 *out; + unsigned int mr=0,mg=0,mb=0,ma=0; + stbi_uc pal[256][4]; + int psize=0,i,j,compress=0,width; + int bpp, flip_vertically, pad, target, offset, hsz; + if (get8(s) != 'B' || get8(s) != 'M') return epuc("not BMP", "Corrupt BMP"); + get32le(s); // discard filesize + get16le(s); // discard reserved + get16le(s); // discard reserved + offset = get32le(s); + hsz = get32le(s); + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108) return epuc("unknown BMP", "BMP type not supported: unknown"); + failure_reason = "bad BMP"; + if (hsz == 12) { + s->img_x = get16le(s); + s->img_y = get16le(s); + } else { + s->img_x = get32le(s); + s->img_y = get32le(s); + } + if (get16le(s) != 1) return 0; + bpp = get16le(s); + if (bpp == 1) return epuc("monochrome", "BMP type not supported: 1-bit"); + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + if (hsz == 12) { + if (bpp < 24) + psize = (offset - 14 - 24) / 3; + } else { + compress = get32le(s); + if (compress == 1 || compress == 2) return epuc("BMP RLE", "BMP type not supported: RLE"); + get32le(s); // discard sizeof + get32le(s); // discard hres + get32le(s); // discard vres + get32le(s); // discard colorsused + get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + get32le(s); + get32le(s); + get32le(s); + get32le(s); + } + if (bpp == 16 || bpp == 32) { + mr = mg = mb = 0; + if (compress == 0) { + if (bpp == 32) { + mr = 0xff << 16; + mg = 0xff << 8; + mb = 0xff << 0; + } else { + mr = 31 << 10; + mg = 31 << 5; + mb = 31 << 0; + } + } else if (compress == 3) { + mr = get32le(s); + mg = get32le(s); + mb = get32le(s); + // not documented, but generated by photoshop and handled by mspaint + if (mr == mg && mg == mb) { + // ?!?!? + return NULL; + } + } else + return NULL; + } + } else { + assert(hsz == 108); + mr = get32le(s); + mg = get32le(s); + mb = get32le(s); + ma = get32le(s); + get32le(s); // discard color space + for (i=0; i < 12; ++i) + get32le(s); // discard color space parameters + } + if (bpp < 16) + psize = (offset - 14 - hsz) >> 2; + } + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + out = (stbi_uc *) malloc(target * s->img_x * s->img_y); + if (!out) return epuc("outofmem", "Out of memory"); + if (bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { free(out); return epuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = get8(s); + pal[i][1] = get8(s); + pal[i][0] = get8(s); + if (hsz != 12) get8(s); + pal[i][3] = 255; + } + skip(s, offset - 14 - hsz - psize * (hsz == 12 ? 3 : 4)); + if (bpp == 4) width = (s->img_x + 1) >> 1; + else if (bpp == 8) width = s->img_x; + else { free(out); return epuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=get8(s),v2=0; + if (bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + v = (bpp == 8) ? get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + } + skip(s, pad); + } + } else { + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; + skip(s, offset - 14 - hsz); + if (bpp == 24) width = 3 * s->img_x; + else if (bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; + if (bpp == 24) { + easy = 1; + } else if (bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0xff000000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) return epuc("bad masks", "Corrupt BMP"); + // right shift amt to put high bit in position #7 + rshift = high_bit(mr)-7; rcount = bitcount(mr); + gshift = high_bit(mg)-7; gcount = bitcount(mr); + bshift = high_bit(mb)-7; bcount = bitcount(mr); + ashift = high_bit(ma)-7; acount = bitcount(mr); + } + for (j=0; j < (int) s->img_y; ++j) { + if (easy) { + for (i=0; i < (int) s->img_x; ++i) { + int a; + out[z+2] = get8(s); + out[z+1] = get8(s); + out[z+0] = get8(s); + z += 3; + a = (easy == 2 ? get8(s) : 255); + if (target == 4) out[z++] = a; + } + } else { + for (i=0; i < (int) s->img_x; ++i) { + uint32 v = (bpp == 16 ? get16le(s) : get32le(s)); + int a; + out[z++] = shiftsigned(v & mr, rshift, rcount); + out[z++] = shiftsigned(v & mg, gshift, gcount); + out[z++] = shiftsigned(v & mb, bshift, bcount); + a = (ma ? shiftsigned(v & ma, ashift, acount) : 255); + if (target == 4) out[z++] = a; + } + } + skip(s, pad); + } + } + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { + stbi_uc *p1 = out + j *s->img_x*target; + stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; + for (i=0; i < (int) s->img_x*target; ++i) { + t = p1[i], p1[i] = p2[i], p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = target; + return out; +} + +#ifndef STBI_NO_STDIO +stbi_uc *stbi_bmp_load (char const *filename, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_bmp_load_from_file(f, x,y,comp,req_comp); + fclose(f); + return data; +} + +stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s, f); + return bmp_load(&s, x,y,comp,req_comp); +} +#endif + +stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s, buffer, len); + return bmp_load(&s, x,y,comp,req_comp); +} + +// Targa Truevision - TGA +// by Jonathan Dummer + +static int tga_test(stbi *s) +{ + int sz; + get8u(s); // discard Offset + sz = get8u(s); // color type + if( sz > 1 ) return 0; // only RGB or indexed allowed + sz = get8u(s); // image type + if( (sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11) ) return 0; // only RGB or grey allowed, +/- RLE + get16(s); // discard palette start + get16(s); // discard palette length + get8(s); // discard bits per palette color entry + get16(s); // discard x origin + get16(s); // discard y origin + if( get16(s) < 1 ) return 0; // test width + if( get16(s) < 1 ) return 0; // test height + sz = get8(s); // bits per pixel + if( (sz != 8) && (sz != 16) && (sz != 24) && (sz != 32) ) return 0; // only RGB or RGBA or grey allowed + return 1; // seems to have passed everything +} + +#ifndef STBI_NO_STDIO +int stbi_tga_test_file (FILE *f) +{ + stbi s; + int r,n = ftell(f); + start_file(&s, f); + r = tga_test(&s); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_tga_test_memory (stbi_uc const *buffer, int len) +{ + stbi s; + start_mem(&s, buffer, len); + return tga_test(&s); +} + +static stbi_uc *tga_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + // read in the TGA header stuff + int tga_offset = get8u(s); + int tga_indexed = get8u(s); + int tga_image_type = get8u(s); + int tga_is_RLE = 0; + int tga_palette_start = get16le(s); + int tga_palette_len = get16le(s); + int tga_palette_bits = get8u(s); + int tga_x_origin = get16le(s); + int tga_y_origin = get16le(s); + int tga_width = get16le(s); + int tga_height = get16le(s); + int tga_bits_per_pixel = get8u(s); + int tga_inverted = get8u(s); + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; + unsigned char raw_data[4]; + unsigned char trans_data[] = { 0,0,0,0 }; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + // do a tiny bit of precessing + if( tga_image_type >= 8 ) + { + tga_image_type -= 8; + tga_is_RLE = 1; + } + /* int tga_alpha_bits = tga_inverted & 15; */ + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // error check + if( //(tga_indexed) || + (tga_width < 1) || (tga_height < 1) || + (tga_image_type < 1) || (tga_image_type > 3) || + ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16) && + (tga_bits_per_pixel != 24) && (tga_bits_per_pixel != 32)) + ) + { + return NULL; + } + + // If I'm paletted, then I'll use the number of bits from the palette + if( tga_indexed ) + { + tga_bits_per_pixel = tga_palette_bits; + } + + // tga info + *x = tga_width; + *y = tga_height; + if( (req_comp < 1) || (req_comp > 4) ) + { + // just use whatever the file was + req_comp = tga_bits_per_pixel / 8; + *comp = req_comp; + } else + { + // force a new number of components + *comp = tga_bits_per_pixel/8; + } + tga_data = (unsigned char*)malloc( tga_width * tga_height * req_comp ); + + // skip to the data's starting position (offset usually = 0) + skip(s, tga_offset ); + // do I need to load a palette? + if( tga_indexed ) + { + // any data to skip? (offset usually = 0) + skip(s, tga_palette_start ); + // load the palette + tga_palette = (unsigned char*)malloc( tga_palette_len * tga_palette_bits / 8 ); + getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 ); + } + // load the data + for( i = 0; i < tga_width * tga_height; ++i ) + { + // if I'm in RLE mode, do I need to get a RLE chunk? + if( tga_is_RLE ) + { + if( RLE_count == 0 ) + { + // yep, get the next byte as a RLE command + int RLE_cmd = get8u(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if( !RLE_repeating ) + { + read_next_pixel = 1; + } + } else + { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if( read_next_pixel ) + { + // load however much data we did have + if( tga_indexed ) + { + // read in 1 byte, then perform the lookup + int pal_idx = get8u(s); + if( pal_idx >= tga_palette_len ) + { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_bits_per_pixel / 8; + for( j = 0; j*8 < tga_bits_per_pixel; ++j ) + { + raw_data[j] = tga_palette[pal_idx+j]; + } + } else + { + // read in the data raw + for( j = 0; j*8 < tga_bits_per_pixel; ++j ) + { + raw_data[j] = get8u(s); + } + } + // convert raw to the intermediate format + switch( tga_bits_per_pixel ) + { + case 8: + // Luminous => RGBA + trans_data[0] = raw_data[0]; + trans_data[1] = raw_data[0]; + trans_data[2] = raw_data[0]; + trans_data[3] = 255; + break; + case 16: + // Luminous,Alpha => RGBA + trans_data[0] = raw_data[0]; + trans_data[1] = raw_data[0]; + trans_data[2] = raw_data[0]; + trans_data[3] = raw_data[1]; + break; + case 24: + // BGR => RGBA + trans_data[0] = raw_data[2]; + trans_data[1] = raw_data[1]; + trans_data[2] = raw_data[0]; + trans_data[3] = 255; + break; + case 32: + // BGRA => RGBA + trans_data[0] = raw_data[2]; + trans_data[1] = raw_data[1]; + trans_data[2] = raw_data[0]; + trans_data[3] = raw_data[3]; + break; + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + // convert to final format + switch( req_comp ) + { + case 1: + // RGBA => Luminance + tga_data[i*req_comp+0] = compute_y(trans_data[0],trans_data[1],trans_data[2]); + break; + case 2: + // RGBA => Luminance,Alpha + tga_data[i*req_comp+0] = compute_y(trans_data[0],trans_data[1],trans_data[2]); + tga_data[i*req_comp+1] = trans_data[3]; + break; + case 3: + // RGBA => RGB + tga_data[i*req_comp+0] = trans_data[0]; + tga_data[i*req_comp+1] = trans_data[1]; + tga_data[i*req_comp+2] = trans_data[2]; + break; + case 4: + // RGBA => RGBA + tga_data[i*req_comp+0] = trans_data[0]; + tga_data[i*req_comp+1] = trans_data[1]; + tga_data[i*req_comp+2] = trans_data[2]; + tga_data[i*req_comp+3] = trans_data[3]; + break; + } + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if( tga_inverted ) + { + for( j = 0; j*2 < tga_height; ++j ) + { + int index1 = j * tga_width * req_comp; + int index2 = (tga_height - 1 - j) * tga_width * req_comp; + for( i = tga_width * req_comp; i > 0; --i ) + { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if( tga_palette != NULL ) + { + free( tga_palette ); + } + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = + tga_x_origin = tga_y_origin = 0; + // OK, done + return tga_data; +} + +#ifndef STBI_NO_STDIO +stbi_uc *stbi_tga_load (char const *filename, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_tga_load_from_file(f, x,y,comp,req_comp); + fclose(f); + return data; +} + +stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s, f); + return tga_load(&s, x,y,comp,req_comp); +} +#endif + +stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s, buffer, len); + return tga_load(&s, x,y,comp,req_comp); +} + + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicholas Schulz, tweaked by STB + +static int psd_test(stbi *s) +{ + if (get32(s) != 0x38425053) return 0; // "8BPS" + else return 1; +} + +#ifndef STBI_NO_STDIO +int stbi_psd_test_file(FILE *f) +{ + stbi s; + int r,n = ftell(f); + start_file(&s, f); + r = psd_test(&s); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_psd_test_memory(stbi_uc const *buffer, int len) +{ + stbi s; + start_mem(&s, buffer, len); + return psd_test(&s); +} + +static stbi_uc *psd_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + int pixelCount; + int channelCount, compression; + int channel, i, count, len; + int w,h; + uint8 *out; + + // Check identifier + if (get32(s) != 0x38425053) // "8BPS" + return epuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (get16(s) != 1) + return epuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + skip(s, 6 ); + + // Read the number of channels (R, G, B, A, etc). + channelCount = get16(s); + if (channelCount < 0 || channelCount > 16) + return epuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = get32(s); + w = get32(s); + + // Make sure the depth is 8 bits. + if (get16(s) != 8) + return epuc("unsupported bit depth", "PSD bit depth is not 8 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (get16(s) != 3) + return epuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + skip(s,get32(s) ); + + // Skip the image resources. (resolution, pen tool paths, etc) + skip(s, get32(s) ); + + // Skip the reserved data. + skip(s, get32(s) ); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = get16(s); + if (compression > 1) + return epuc("bad compression", "PSD has an unknown compression format"); + + // Create the destination image. + out = (stbi_uc *) malloc(4 * w*h); + if (!out) return epuc("outofmem", "Out of memory"); + pixelCount = w*h; + + // Initialize the data to zero. + //memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data, + // which we're going to just skip. + skip(s, h * channelCount * 2 ); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + uint8 *p; + + p = out+channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++) *p = (channel == 3 ? 255 : 0), p += 4; + } else { + // Read the RLE data. + count = 0; + while (count < pixelCount) { + len = get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + count += len; + while (len) { + *p = get8(s); + p += 4; + len--; + } + } else if (len > 128) { + uint32 val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len ^= 0x0FF; + len += 2; + val = get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + } + } + + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + uint8 *p; + + p = out + channel; + if (channel > channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++) *p = channel == 3 ? 255 : 0, p += 4; + } else { + // Read the data. + count = 0; + for (i = 0; i < pixelCount; i++) + *p = get8(s), p += 4; + } + } + } + + if (req_comp && req_comp != 4) { + out = convert_format(out, 4, req_comp, w, h); + if (out == NULL) return out; // convert_format frees input on failure + } + + if (comp) *comp = channelCount; + *y = h; + *x = w; + + return out; +} + +#ifndef STBI_NO_STDIO +stbi_uc *stbi_psd_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_psd_load_from_file(f, x,y,comp,req_comp); + fclose(f); + return data; +} + +stbi_uc *stbi_psd_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s, f); + return psd_load(&s, x,y,comp,req_comp); +} +#endif + +stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s, buffer, len); + return psd_load(&s, x,y,comp,req_comp); +} + + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int hdr_test(stbi *s) +{ + char *signature = "#?RADIANCE\n"; + int i; + for (i=0; signature[i]; ++i) + if (get8(s) != signature[i]) + return 0; + return 1; +} + +int stbi_hdr_test_memory(stbi_uc const *buffer, int len) +{ + stbi s; + start_mem(&s, buffer, len); + return hdr_test(&s); +} + +#ifndef STBI_NO_STDIO +int stbi_hdr_test_file(FILE *f) +{ + stbi s; + int r,n = ftell(f); + start_file(&s, f); + r = hdr_test(&s); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +#define HDR_BUFLEN 1024 +static char *hdr_gettoken(stbi *z, char *buffer) +{ + int len=0; + //char *s = buffer, + char c = '\0'; + + c = get8(z); + + while (!at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == HDR_BUFLEN-1) { + // flush to end of line + while (!at_eof(z) && get8(z) != '\n') + ; + break; + } + c = get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void hdr_convert(float *output, stbi_uc *input, int req_comp) +{ + if( input[3] != 0 ) { + float f1; + // Exponent + f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) output[1] = 1; + if (req_comp == 4) output[3] = 1; + } else { + switch (req_comp) { + case 4: output[3] = 1; /* fallthrough */ + case 3: output[0] = output[1] = output[2] = 0; + break; + case 2: output[1] = 1; /* fallthrough */ + case 1: output[0] = 0; + break; + } + } +} + + +static float *hdr_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + char buffer[HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + float *hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + + + // Check identifier + if (strcmp(hdr_gettoken(s,buffer), "#?RADIANCE") != 0) + return epf("not HDR", "Corrupt HDR image"); + + // Parse header + while(1) { + token = hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return epf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return epf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return epf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = strtol(token, NULL, 10); + + *x = width; + *y = height; + + *comp = 3; + if (req_comp == 0) req_comp = 3; + + // Read data + hdr_data = (float *) malloc(height * width * req_comp * sizeof(float)); + + // Load image data + // image data is stored as some number of sca + if( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + getn(s, rgbe, 4); + hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = get8(s); + c2 = get8(s); + len = get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4] = { c1,c2,len, get8(s) }; + hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + free(scanline); + goto main_decode_loop; // yes, this is fucking insane; blame the fucking insane format + } + len <<= 8; + len |= get8(s); + if (len != width) { free(hdr_data); free(scanline); return epf("invalid decoded scanline length", "corrupt HDR"); } + if (scanline == NULL) scanline = (stbi_uc *) malloc(width * 4); + + for (k = 0; k < 4; ++k) { + i = 0; + while (i < width) { + count = get8(s); + if (count > 128) { + // Run + value = get8(s); + count -= 128; + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = get8(s); + } + } + } + for (i=0; i < width; ++i) + hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } + free(scanline); + } + + return hdr_data; +} + +static stbi_uc *hdr_load_rgbe(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + char buffer[HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + stbi_uc *rgbe_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + + + // Check identifier + if (strcmp(hdr_gettoken(s,buffer), "#?RADIANCE") != 0) + return epuc("not HDR", "Corrupt HDR image"); + + // Parse header + while(1) { + token = hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return epuc("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return epuc("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return epuc("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = strtol(token, NULL, 10); + + *x = width; + *y = height; + + // RGBE _MUST_ come out as 4 components + *comp = 4; + req_comp = 4; + + // Read data + rgbe_data = (stbi_uc *) malloc(height * width * req_comp * sizeof(stbi_uc)); + // point to the beginning + scanline = rgbe_data; + + // Load image data + // image data is stored as some number of scan lines + if( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + main_decode_loop: + //getn(rgbe, 4); + getn(s,scanline, 4); + scanline += 4; + } + } + } else { + // Read RLE-encoded data + for (j = 0; j < height; ++j) { + c1 = get8(s); + c2 = get8(s); + len = get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + scanline[0] = c1; + scanline[1] = c2; + scanline[2] = len; + scanline[3] = get8(s); + scanline += 4; + i = 1; + j = 0; + goto main_decode_loop; // yes, this is insane; blame the insane format + } + len <<= 8; + len |= get8(s); + if (len != width) { free(rgbe_data); return epuc("invalid decoded scanline length", "corrupt HDR"); } + for (k = 0; k < 4; ++k) { + i = 0; + while (i < width) { + count = get8(s); + if (count > 128) { + // Run + value = get8(s); + count -= 128; + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = get8(s); + } + } + } + // move the scanline on + scanline += 4 * width; + } + } + + return rgbe_data; +} + +#ifndef STBI_NO_STDIO +float *stbi_hdr_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s,f); + return hdr_load(&s,x,y,comp,req_comp); +} + +stbi_uc *stbi_hdr_load_rgbe_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s,f); + return hdr_load_rgbe(&s,x,y,comp,req_comp); +} + +stbi_uc *stbi_hdr_load_rgbe (char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = fopen(filename, "rb"); + unsigned char *result; + if (!f) return epuc("can't fopen", "Unable to open file"); + result = stbi_hdr_load_rgbe_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} +#endif + +float *stbi_hdr_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer, len); + return hdr_load(&s,x,y,comp,req_comp); +} + +stbi_uc *stbi_hdr_load_rgbe_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer, len); + return hdr_load_rgbe(&s,x,y,comp,req_comp); +} + +#endif // STBI_NO_HDR + +/////////////////////// write image /////////////////////// + +#ifndef STBI_NO_WRITE + +static void write8(FILE *f, int x) { uint8 z = (uint8) x; fwrite(&z,1,1,f); } + +static void writefv(FILE *f, char *fmt, va_list v) +{ + while (*fmt) { + switch (*fmt++) { + case ' ': break; + case '1': { uint8 x = va_arg(v, int); write8(f,x); break; } + case '2': { int16 x = va_arg(v, int); write8(f,x); write8(f,x>>8); break; } + case '4': { int32 x = va_arg(v, int); write8(f,x); write8(f,x>>8); write8(f,x>>16); write8(f,x>>24); break; } + default: + assert(0); + va_end(v); + return; + } + } +} + +static void writef(FILE *f, char *fmt, ...) +{ + va_list v; + va_start(v, fmt); + writefv(f,fmt,v); + va_end(v); +} + +static void write_pixels(FILE *f, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad) +{ + uint8 bg[3] = { 255, 0, 255}, px[3]; + uint32 zero = 0; + int i,j,k, j_end; + + if (vdir < 0) + j_end = -1, j = y-1; + else + j_end = y, j = 0; + + for (; j != j_end; j += vdir) { + for (i=0; i < x; ++i) { + uint8 *d = (uint8 *) data + (j*x+i)*comp; + if (write_alpha < 0) + fwrite(&d[comp-1], 1, 1, f); + switch (comp) { + case 1: + case 2: writef(f, "111", d[0],d[0],d[0]); + break; + case 4: + if (!write_alpha) { + for (k=0; k < 3; ++k) + px[k] = bg[k] + ((d[k] - bg[k]) * d[3])/255; + writef(f, "111", px[1-rgb_dir],px[1],px[1+rgb_dir]); + break; + } + /* FALLTHROUGH */ + case 3: + writef(f, "111", d[1-rgb_dir],d[1],d[1+rgb_dir]); + break; + } + if (write_alpha > 0) + fwrite(&d[comp-1], 1, 1, f); + } + fwrite(&zero,scanline_pad,1,f); + } +} + +static int outfile(char const *filename, int rgb_dir, int vdir, int x, int y, int comp, void *data, int alpha, int pad, char *fmt, ...) +{ + FILE *f = fopen(filename, "wb"); + if (f) { + va_list v; + va_start(v, fmt); + writefv(f, fmt, v); + va_end(v); + write_pixels(f,rgb_dir,vdir,x,y,comp,data,alpha,pad); + fclose(f); + } + return f != NULL; +} + +int stbi_write_bmp(char const *filename, int x, int y, int comp, void *data) +{ + int pad = (-x*3) & 3; + return outfile(filename,-1,-1,x,y,comp,data,0,pad, + "11 4 22 4" "4 44 22 444444", + 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header + 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header +} + +int stbi_write_tga(char const *filename, int x, int y, int comp, void *data) +{ + int has_alpha = !(comp & 1); + return outfile(filename, -1,-1, x, y, comp, data, has_alpha, 0, + "111 221 2222 11", 0,0,2, 0,0,0, 0,0,x,y, 24+8*has_alpha, 8*has_alpha); +} + +// any other image formats that do interleaved rgb data? +// PNG: requires adler32,crc32 -- significant amount of code +// PSD: no, channels output separately +// TIFF: no, stripwise-interleaved... i think + +#endif // STBI_NO_WRITE + +// add in my DDS loading support +#ifndef STBI_NO_DDS +#include "stbi_DDS_aug_c.h" +#endif diff --git a/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.h b/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.h new file mode 100644 index 0000000..e59f2eb --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/stb_image_aug.h @@ -0,0 +1,354 @@ +/* stbi-1.16 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c + when you control the images you're loading + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline (no JPEG progressive, no oddball channel decimations) + PNG non-interlaced + BMP non-1bpp, non-RLE + TGA (not sure what subset, if a subset) + PSD (composited view only, no extra channels) + HDR (radiance rgbE format) + writes BMP,TGA (define STBI_NO_WRITE to remove code) + decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code) + supports installable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD) + + TODO: + stbi_info_* + + history: + 1.16 major bugfix - convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug; header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less + than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant +*/ + +#ifndef HEADER_STB_IMAGE_AUGMENTED +#define HEADER_STB_IMAGE_AUGMENTED + +//// begin header file //////////////////////////////////////////////////// +// +// Limitations: +// - no progressive/interlaced support (jpeg, png) +// - 8-bit samples only (jpeg, png) +// - not threadsafe +// - channel subsampling of at most 2 in each dimension (jpeg) +// - no delayed line count (jpeg) -- IJG doesn't support either +// +// Basic usage (see HDR discussion below): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// stbi_image_free(data) +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *comp -- outputs # of image components in image file +// int req_comp -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise. +// If req_comp is non-zero, *comp has the number of components that _would_ +// have been output otherwise. E.g. if you set req_comp to 4, you will always +// get RGBA output, but you can check *comp to easily see if it's opaque. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *comp will be unchanged. The function stbi_failure_reason() +// can be queried for an extremely brief, end-user unfriendly explanation +// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid +// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG and BMP images are automatically depalettized. +// +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image now supports loading HDR images in general, and currently +// the Radiance .HDR file format, although the support is provided +// generically. You can still load any file through the existing interface; +// if you attempt to load an HDR file, it will be automatically remapped to +// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); + +#ifndef STBI_NO_STDIO +#include +#endif + +#define STBI_VERSION 1 + +enum +{ + STBI_default = 0, // only used for req_comp + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4, +}; + +typedef unsigned char stbi_uc; + +#ifdef __cplusplus +extern "C" { +#endif + +// WRITING API + +#if !defined(STBI_NO_WRITE) && !defined(STBI_NO_STDIO) +// write a BMP/TGA file given tightly packed 'comp' channels (no padding, nor bmp-stride-padding) +// (you must include the appropriate extension in the filename). +// returns TRUE on success, FALSE if couldn't open file, error writing file +extern int stbi_write_bmp (char const *filename, int x, int y, int comp, void *data); +extern int stbi_write_tga (char const *filename, int x, int y, int comp, void *data); +#endif + +// PRIMARY API - works on images of any type + +// load image by filename, open file, or memory buffer +#ifndef STBI_NO_STDIO +extern stbi_uc *stbi_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif +extern stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +// for stbi_load_from_file, file pointer is left pointing immediately after image + +#ifndef STBI_NO_HDR +#ifndef STBI_NO_STDIO +extern float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp); +extern float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif +extern float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); + +extern void stbi_hdr_to_ldr_gamma(float gamma); +extern void stbi_hdr_to_ldr_scale(float scale); + +extern void stbi_ldr_to_hdr_gamma(float gamma); +extern void stbi_ldr_to_hdr_scale(float scale); + +#endif // STBI_NO_HDR + +// get a VERY brief reason for failure +// NOT THREADSAFE +extern char *stbi_failure_reason (void); + +// free the loaded image -- this is just free() +extern void stbi_image_free (void *retval_from_stbi_load); + +// get image dimensions & components without fully decoding +extern int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); +extern int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +#ifndef STBI_NO_STDIO +extern int stbi_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_is_hdr (char const *filename); +extern int stbi_is_hdr_from_file(FILE *f); +#endif + +// ZLIB client - used by PNG, available for other purposes + +extern char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); +extern char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); +extern int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + +extern char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); +extern int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + +// TYPE-SPECIFIC ACCESS + +// is it a jpeg? +extern int stbi_jpeg_test_memory (stbi_uc const *buffer, int len); +extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +extern int stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); + +#ifndef STBI_NO_STDIO +extern stbi_uc *stbi_jpeg_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern int stbi_jpeg_test_file (FILE *f); +extern stbi_uc *stbi_jpeg_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); + +extern int stbi_jpeg_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif + +// is it a png? +extern int stbi_png_test_memory (stbi_uc const *buffer, int len); +extern stbi_uc *stbi_png_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +extern int stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp); + +#ifndef STBI_NO_STDIO +extern stbi_uc *stbi_png_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern int stbi_png_info (char const *filename, int *x, int *y, int *comp); +extern int stbi_png_test_file (FILE *f); +extern stbi_uc *stbi_png_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp); +#endif + +// is it a bmp? +extern int stbi_bmp_test_memory (stbi_uc const *buffer, int len); + +extern stbi_uc *stbi_bmp_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +#ifndef STBI_NO_STDIO +extern int stbi_bmp_test_file (FILE *f); +extern stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif + +// is it a tga? +extern int stbi_tga_test_memory (stbi_uc const *buffer, int len); + +extern stbi_uc *stbi_tga_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +#ifndef STBI_NO_STDIO +extern int stbi_tga_test_file (FILE *f); +extern stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif + +// is it a psd? +extern int stbi_psd_test_memory (stbi_uc const *buffer, int len); + +extern stbi_uc *stbi_psd_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +#ifndef STBI_NO_STDIO +extern int stbi_psd_test_file (FILE *f); +extern stbi_uc *stbi_psd_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif + +// is it an hdr? +extern int stbi_hdr_test_memory (stbi_uc const *buffer, int len); + +extern float * stbi_hdr_load (char const *filename, int *x, int *y, int *comp, int req_comp); +extern float * stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_hdr_load_rgbe (char const *filename, int *x, int *y, int *comp, int req_comp); +extern float * stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +#ifndef STBI_NO_STDIO +extern int stbi_hdr_test_file (FILE *f); +extern float * stbi_hdr_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_hdr_load_rgbe_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif + +// define new loaders +typedef struct +{ + int (*test_memory)(stbi_uc const *buffer, int len); + stbi_uc * (*load_from_memory)(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); + #ifndef STBI_NO_STDIO + int (*test_file)(FILE *f); + stbi_uc * (*load_from_file)(FILE *f, int *x, int *y, int *comp, int req_comp); + #endif +} stbi_loader; + +// register a loader by filling out the above structure (you must defined ALL functions) +// returns 1 if added or already added, 0 if not added (too many loaders) +// NOT THREADSAFE +extern int stbi_register_loader(stbi_loader *loader); + +// define faster low-level operations (typically SIMD support) +#if STBI_SIMD +typedef void (*stbi_idct_8x8)(uint8 *out, int out_stride, short data[64], unsigned short *dequantize); +// compute an integer IDCT on "input" +// input[x] = data[x] * dequantize[x] +// write results to 'out': 64 samples, each run of 8 spaced by 'out_stride' +// CLAMP results to 0..255 +typedef void (*stbi_YCbCr_to_RGB_run)(uint8 *output, uint8 const *y, uint8 const *cb, uint8 const *cr, int count, int step); +// compute a conversion from YCbCr to RGB +// 'count' pixels +// write pixels to 'output'; each pixel is 'step' bytes (either 3 or 4; if 4, write '255' as 4th), order R,G,B +// y: Y input channel +// cb: Cb input channel; scale/biased to be 0..255 +// cr: Cr input channel; scale/biased to be 0..255 + +extern void stbi_install_idct(stbi_idct_8x8 func); +extern void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func); +#endif // STBI_SIMD + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H diff --git a/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug.h b/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug.h new file mode 100644 index 0000000..c7da9f7 --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug.h @@ -0,0 +1,21 @@ +/* + adding DDS loading support to stbi +*/ + +#ifndef HEADER_STB_IMAGE_DDS_AUGMENTATION +#define HEADER_STB_IMAGE_DDS_AUGMENTATION + +// is it a DDS file? +extern int stbi_dds_test_memory (stbi_uc const *buffer, int len); + +extern stbi_uc *stbi_dds_load (char *filename, int *x, int *y, int *comp, int req_comp); +extern stbi_uc *stbi_dds_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); +#ifndef STBI_NO_STDIO +extern int stbi_dds_test_file (FILE *f); +extern stbi_uc *stbi_dds_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // HEADER_STB_IMAGE_DDS_AUGMENTATION diff --git a/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug_c.h b/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug_c.h new file mode 100644 index 0000000..f49407a --- /dev/null +++ b/GrafikaProjekt/pliki/src/SOIL/stbi_DDS_aug_c.h @@ -0,0 +1,511 @@ + +/// DDS file support, does decoding, _not_ direct uploading +/// (use SOIL for that ;-) + +/// A bunch of DirectDraw Surface structures and flags +typedef struct { + unsigned int dwMagic; + unsigned int dwSize; + unsigned int dwFlags; + unsigned int dwHeight; + unsigned int dwWidth; + unsigned int dwPitchOrLinearSize; + unsigned int dwDepth; + unsigned int dwMipMapCount; + unsigned int dwReserved1[ 11 ]; + + // DDPIXELFORMAT + struct { + unsigned int dwSize; + unsigned int dwFlags; + unsigned int dwFourCC; + unsigned int dwRGBBitCount; + unsigned int dwRBitMask; + unsigned int dwGBitMask; + unsigned int dwBBitMask; + unsigned int dwAlphaBitMask; + } sPixelFormat; + + // DDCAPS2 + struct { + unsigned int dwCaps1; + unsigned int dwCaps2; + unsigned int dwDDSX; + unsigned int dwReserved; + } sCaps; + unsigned int dwReserved2; +} DDS_header ; + +// the following constants were copied directly off the MSDN website + +// The dwFlags member of the original DDSURFACEDESC2 structure +// can be set to one or more of the following values. +#define DDSD_CAPS 0x00000001 +#define DDSD_HEIGHT 0x00000002 +#define DDSD_WIDTH 0x00000004 +#define DDSD_PITCH 0x00000008 +#define DDSD_PIXELFORMAT 0x00001000 +#define DDSD_MIPMAPCOUNT 0x00020000 +#define DDSD_LINEARSIZE 0x00080000 +#define DDSD_DEPTH 0x00800000 + +// DirectDraw Pixel Format +#define DDPF_ALPHAPIXELS 0x00000001 +#define DDPF_FOURCC 0x00000004 +#define DDPF_RGB 0x00000040 + +// The dwCaps1 member of the DDSCAPS2 structure can be +// set to one or more of the following values. +#define DDSCAPS_COMPLEX 0x00000008 +#define DDSCAPS_TEXTURE 0x00001000 +#define DDSCAPS_MIPMAP 0x00400000 + +// The dwCaps2 member of the DDSCAPS2 structure can be +// set to one or more of the following values. +#define DDSCAPS2_CUBEMAP 0x00000200 +#define DDSCAPS2_CUBEMAP_POSITIVEX 0x00000400 +#define DDSCAPS2_CUBEMAP_NEGATIVEX 0x00000800 +#define DDSCAPS2_CUBEMAP_POSITIVEY 0x00001000 +#define DDSCAPS2_CUBEMAP_NEGATIVEY 0x00002000 +#define DDSCAPS2_CUBEMAP_POSITIVEZ 0x00004000 +#define DDSCAPS2_CUBEMAP_NEGATIVEZ 0x00008000 +#define DDSCAPS2_VOLUME 0x00200000 + +static int dds_test(stbi *s) +{ + // check the magic number + if (get8(s) != 'D') return 0; + if (get8(s) != 'D') return 0; + if (get8(s) != 'S') return 0; + if (get8(s) != ' ') return 0; + // check header size + if (get32le(s) != 124) return 0; + return 1; +} +#ifndef STBI_NO_STDIO +int stbi_dds_test_file (FILE *f) +{ + stbi s; + int r,n = ftell(f); + start_file(&s,f); + r = dds_test(&s); + fseek(f,n,SEEK_SET); + return r; +} +#endif + +int stbi_dds_test_memory (stbi_uc const *buffer, int len) +{ + stbi s; + start_mem(&s,buffer, len); + return dds_test(&s); +} + +// helper functions +int stbi_convert_bit_range( int c, int from_bits, int to_bits ) +{ + int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1); + return (b + (b >> from_bits)) >> from_bits; +} +void stbi_rgb_888_from_565( unsigned int c, int *r, int *g, int *b ) +{ + *r = stbi_convert_bit_range( (c >> 11) & 31, 5, 8 ); + *g = stbi_convert_bit_range( (c >> 05) & 63, 6, 8 ); + *b = stbi_convert_bit_range( (c >> 00) & 31, 5, 8 ); +} +void stbi_decode_DXT1_block( + unsigned char uncompressed[16*4], + unsigned char compressed[8] ) +{ + int next_bit = 4*8; + int i, r, g, b; + int c0, c1; + unsigned char decode_colors[4*4]; + // find the 2 primary colors + c0 = compressed[0] + (compressed[1] << 8); + c1 = compressed[2] + (compressed[3] << 8); + stbi_rgb_888_from_565( c0, &r, &g, &b ); + decode_colors[0] = r; + decode_colors[1] = g; + decode_colors[2] = b; + decode_colors[3] = 255; + stbi_rgb_888_from_565( c1, &r, &g, &b ); + decode_colors[4] = r; + decode_colors[5] = g; + decode_colors[6] = b; + decode_colors[7] = 255; + if( c0 > c1 ) + { + // no alpha, 2 interpolated colors + decode_colors[8] = (2*decode_colors[0] + decode_colors[4]) / 3; + decode_colors[9] = (2*decode_colors[1] + decode_colors[5]) / 3; + decode_colors[10] = (2*decode_colors[2] + decode_colors[6]) / 3; + decode_colors[11] = 255; + decode_colors[12] = (decode_colors[0] + 2*decode_colors[4]) / 3; + decode_colors[13] = (decode_colors[1] + 2*decode_colors[5]) / 3; + decode_colors[14] = (decode_colors[2] + 2*decode_colors[6]) / 3; + decode_colors[15] = 255; + } else + { + // 1 interpolated color, alpha + decode_colors[8] = (decode_colors[0] + decode_colors[4]) / 2; + decode_colors[9] = (decode_colors[1] + decode_colors[5]) / 2; + decode_colors[10] = (decode_colors[2] + decode_colors[6]) / 2; + decode_colors[11] = 255; + decode_colors[12] = 0; + decode_colors[13] = 0; + decode_colors[14] = 0; + decode_colors[15] = 0; + } + // decode the block + for( i = 0; i < 16*4; i += 4 ) + { + int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 4; + next_bit += 2; + uncompressed[i+0] = decode_colors[idx+0]; + uncompressed[i+1] = decode_colors[idx+1]; + uncompressed[i+2] = decode_colors[idx+2]; + uncompressed[i+3] = decode_colors[idx+3]; + } + // done +} +void stbi_decode_DXT23_alpha_block( + unsigned char uncompressed[16*4], + unsigned char compressed[8] ) +{ + int i, next_bit = 0; + // each alpha value gets 4 bits + for( i = 3; i < 16*4; i += 4 ) + { + uncompressed[i] = stbi_convert_bit_range( + (compressed[next_bit>>3] >> (next_bit&7)) & 15, + 4, 8 ); + next_bit += 4; + } +} +void stbi_decode_DXT45_alpha_block( + unsigned char uncompressed[16*4], + unsigned char compressed[8] ) +{ + int i, next_bit = 8*2; + unsigned char decode_alpha[8]; + // each alpha value gets 3 bits, and the 1st 2 bytes are the range + decode_alpha[0] = compressed[0]; + decode_alpha[1] = compressed[1]; + if( decode_alpha[0] > decode_alpha[1] ) + { + // 6 step intermediate + decode_alpha[2] = (6*decode_alpha[0] + 1*decode_alpha[1]) / 7; + decode_alpha[3] = (5*decode_alpha[0] + 2*decode_alpha[1]) / 7; + decode_alpha[4] = (4*decode_alpha[0] + 3*decode_alpha[1]) / 7; + decode_alpha[5] = (3*decode_alpha[0] + 4*decode_alpha[1]) / 7; + decode_alpha[6] = (2*decode_alpha[0] + 5*decode_alpha[1]) / 7; + decode_alpha[7] = (1*decode_alpha[0] + 6*decode_alpha[1]) / 7; + } else + { + // 4 step intermediate, pluss full and none + decode_alpha[2] = (4*decode_alpha[0] + 1*decode_alpha[1]) / 5; + decode_alpha[3] = (3*decode_alpha[0] + 2*decode_alpha[1]) / 5; + decode_alpha[4] = (2*decode_alpha[0] + 3*decode_alpha[1]) / 5; + decode_alpha[5] = (1*decode_alpha[0] + 4*decode_alpha[1]) / 5; + decode_alpha[6] = 0; + decode_alpha[7] = 255; + } + for( i = 3; i < 16*4; i += 4 ) + { + int idx = 0, bit; + bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1; + idx += bit << 0; + ++next_bit; + bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1; + idx += bit << 1; + ++next_bit; + bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1; + idx += bit << 2; + ++next_bit; + uncompressed[i] = decode_alpha[idx & 7]; + } + // done +} +void stbi_decode_DXT_color_block( + unsigned char uncompressed[16*4], + unsigned char compressed[8] ) +{ + int next_bit = 4*8; + int i, r, g, b; + int c0, c1; + unsigned char decode_colors[4*3]; + // find the 2 primary colors + c0 = compressed[0] + (compressed[1] << 8); + c1 = compressed[2] + (compressed[3] << 8); + stbi_rgb_888_from_565( c0, &r, &g, &b ); + decode_colors[0] = r; + decode_colors[1] = g; + decode_colors[2] = b; + stbi_rgb_888_from_565( c1, &r, &g, &b ); + decode_colors[3] = r; + decode_colors[4] = g; + decode_colors[5] = b; + // Like DXT1, but no choicees: + // no alpha, 2 interpolated colors + decode_colors[6] = (2*decode_colors[0] + decode_colors[3]) / 3; + decode_colors[7] = (2*decode_colors[1] + decode_colors[4]) / 3; + decode_colors[8] = (2*decode_colors[2] + decode_colors[5]) / 3; + decode_colors[9] = (decode_colors[0] + 2*decode_colors[3]) / 3; + decode_colors[10] = (decode_colors[1] + 2*decode_colors[4]) / 3; + decode_colors[11] = (decode_colors[2] + 2*decode_colors[5]) / 3; + // decode the block + for( i = 0; i < 16*4; i += 4 ) + { + int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 3; + next_bit += 2; + uncompressed[i+0] = decode_colors[idx+0]; + uncompressed[i+1] = decode_colors[idx+1]; + uncompressed[i+2] = decode_colors[idx+2]; + } + // done +} +static stbi_uc *dds_load(stbi *s, int *x, int *y, int *comp, int req_comp) +{ + // all variables go up front + stbi_uc *dds_data = NULL; + stbi_uc block[16*4]; + stbi_uc compressed[8]; + int flags, DXT_family; + int has_alpha, has_mipmap; + int is_compressed, cubemap_faces; + int block_pitch, num_blocks; + DDS_header header; + int i, sz, cf; + // load the header + if( sizeof( DDS_header ) != 128 ) + { + return NULL; + } + getn( s, (stbi_uc*)(&header), 128 ); + // and do some checking + if( header.dwMagic != (('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24)) ) return NULL; + if( header.dwSize != 124 ) return NULL; + flags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT; + if( (header.dwFlags & flags) != flags ) return NULL; + /* According to the MSDN spec, the dwFlags should contain + DDSD_LINEARSIZE if it's compressed, or DDSD_PITCH if + uncompressed. Some DDS writers do not conform to the + spec, so I need to make my reader more tolerant */ + if( header.sPixelFormat.dwSize != 32 ) return NULL; + flags = DDPF_FOURCC | DDPF_RGB; + if( (header.sPixelFormat.dwFlags & flags) == 0 ) return NULL; + if( (header.sCaps.dwCaps1 & DDSCAPS_TEXTURE) == 0 ) return NULL; + // get the image data + s->img_x = header.dwWidth; + s->img_y = header.dwHeight; + s->img_n = 4; + is_compressed = (header.sPixelFormat.dwFlags & DDPF_FOURCC) / DDPF_FOURCC; + has_alpha = (header.sPixelFormat.dwFlags & DDPF_ALPHAPIXELS) / DDPF_ALPHAPIXELS; + has_mipmap = (header.sCaps.dwCaps1 & DDSCAPS_MIPMAP) && (header.dwMipMapCount > 1); + cubemap_faces = (header.sCaps.dwCaps2 & DDSCAPS2_CUBEMAP) / DDSCAPS2_CUBEMAP; + /* I need cubemaps to have square faces */ + cubemap_faces &= (s->img_x == s->img_y); + cubemap_faces *= 5; + cubemap_faces += 1; + block_pitch = (s->img_x+3) >> 2; + num_blocks = block_pitch * ((s->img_y+3) >> 2); + /* let the user know what's going on */ + *x = s->img_x; + *y = s->img_y; + *comp = s->img_n; + /* is this uncompressed? */ + if( is_compressed ) + { + /* compressed */ + // note: header.sPixelFormat.dwFourCC is something like (('D'<<0)|('X'<<8)|('T'<<16)|('1'<<24)) + DXT_family = 1 + (header.sPixelFormat.dwFourCC >> 24) - '1'; + if( (DXT_family < 1) || (DXT_family > 5) ) return NULL; + /* check the expected size...oops, nevermind... + those non-compliant writers leave + dwPitchOrLinearSize == 0 */ + // passed all the tests, get the RAM for decoding + sz = (s->img_x)*(s->img_y)*4*cubemap_faces; + dds_data = (unsigned char*)malloc( sz ); + /* do this once for each face */ + for( cf = 0; cf < cubemap_faces; ++ cf ) + { + // now read and decode all the blocks + for( i = 0; i < num_blocks; ++i ) + { + // where are we? + int bx, by, bw=4, bh=4; + int ref_x = 4 * (i % block_pitch); + int ref_y = 4 * (i / block_pitch); + // get the next block's worth of compressed data, and decompress it + if( DXT_family == 1 ) + { + // DXT1 + getn( s, compressed, 8 ); + stbi_decode_DXT1_block( block, compressed ); + } else if( DXT_family < 4 ) + { + // DXT2/3 + getn( s, compressed, 8 ); + stbi_decode_DXT23_alpha_block ( block, compressed ); + getn( s, compressed, 8 ); + stbi_decode_DXT_color_block ( block, compressed ); + } else + { + // DXT4/5 + getn( s, compressed, 8 ); + stbi_decode_DXT45_alpha_block ( block, compressed ); + getn( s, compressed, 8 ); + stbi_decode_DXT_color_block ( block, compressed ); + } + // is this a partial block? + if( ref_x + 4 > s->img_x ) + { + bw = s->img_x - ref_x; + } + if( ref_y + 4 > s->img_y ) + { + bh = s->img_y - ref_y; + } + // now drop our decompressed data into the buffer + for( by = 0; by < bh; ++by ) + { + int idx = 4*((ref_y+by+cf*s->img_x)*s->img_x + ref_x); + for( bx = 0; bx < bw*4; ++bx ) + { + + dds_data[idx+bx] = block[by*16+bx]; + } + } + } + /* done reading and decoding the main image... + skip MIPmaps if present */ + if( has_mipmap ) + { + int block_size = 16; + if( DXT_family == 1 ) + { + block_size = 8; + } + for( i = 1; i < header.dwMipMapCount; ++i ) + { + int mx = s->img_x >> (i + 2); + int my = s->img_y >> (i + 2); + if( mx < 1 ) + { + mx = 1; + } + if( my < 1 ) + { + my = 1; + } + skip( s, mx*my*block_size ); + } + } + }/* per cubemap face */ + } else + { + /* uncompressed */ + DXT_family = 0; + s->img_n = 3; + if( has_alpha ) + { + s->img_n = 4; + } + *comp = s->img_n; + sz = s->img_x*s->img_y*s->img_n*cubemap_faces; + dds_data = (unsigned char*)malloc( sz ); + /* do this once for each face */ + for( cf = 0; cf < cubemap_faces; ++ cf ) + { + /* read the main image for this face */ + getn( s, &dds_data[cf*s->img_x*s->img_y*s->img_n], s->img_x*s->img_y*s->img_n ); + /* done reading and decoding the main image... + skip MIPmaps if present */ + if( has_mipmap ) + { + for( i = 1; i < header.dwMipMapCount; ++i ) + { + int mx = s->img_x >> i; + int my = s->img_y >> i; + if( mx < 1 ) + { + mx = 1; + } + if( my < 1 ) + { + my = 1; + } + skip( s, mx*my*s->img_n ); + } + } + } + /* data was BGR, I need it RGB */ + for( i = 0; i < sz; i += s->img_n ) + { + unsigned char temp = dds_data[i]; + dds_data[i] = dds_data[i+2]; + dds_data[i+2] = temp; + } + } + /* finished decompressing into RGBA, + adjust the y size if we have a cubemap + note: sz is already up to date */ + s->img_y *= cubemap_faces; + *y = s->img_y; + // did the user want something else, or + // see if all the alpha values are 255 (i.e. no transparency) + has_alpha = 0; + if( s->img_n == 4) + { + for( i = 3; (i < sz) && (has_alpha == 0); i += 4 ) + { + has_alpha |= (dds_data[i] < 255); + } + } + if( (req_comp <= 4) && (req_comp >= 1) ) + { + // user has some requirements, meet them + if( req_comp != s->img_n ) + { + dds_data = convert_format( dds_data, s->img_n, req_comp, s->img_x, s->img_y ); + *comp = s->img_n; + } + } else + { + // user had no requirements, only drop to RGB is no alpha + if( (has_alpha == 0) && (s->img_n == 4) ) + { + dds_data = convert_format( dds_data, 4, 3, s->img_x, s->img_y ); + *comp = 3; + } + } + // OK, done + return dds_data; +} + +#ifndef STBI_NO_STDIO +stbi_uc *stbi_dds_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_file(&s,f); + return dds_load(&s,x,y,comp,req_comp); +} + +stbi_uc *stbi_dds_load (char *filename, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *data; + FILE *f = fopen(filename, "rb"); + if (!f) return NULL; + data = stbi_dds_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return data; +} +#endif + +stbi_uc *stbi_dds_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi s; + start_mem(&s,buffer, len); + return dds_load(&s,x,y,comp,req_comp); +} diff --git a/GrafikaProjekt/pliki/src/Texture.cpp b/GrafikaProjekt/pliki/src/Texture.cpp index eb641cf..d60c568 100644 --- a/GrafikaProjekt/pliki/src/Texture.cpp +++ b/GrafikaProjekt/pliki/src/Texture.cpp @@ -1,52 +1,31 @@ #include "Texture.h" -#include +#include #include #include -#include "picopng.h" -#include "stb_image.h" +#include "SOIL/SOIL.h" typedef unsigned char byte; - -GLuint Core::LoadTexture(const char* filename) +GLuint Core::LoadTexture( const char * filepath ) { - //std::string path = std::string(filename); + GLuint id; + glGenTextures(1, &id); + glBindTexture(GL_TEXTURE_2D, id); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - unsigned int textureID; - glGenTextures(1, &textureID); + int w, h; + unsigned char* image = SOIL_load_image(filepath, &w, &h, 0, SOIL_LOAD_RGBA); + - int width, height, nrComponents; - stbi_set_flip_vertically_on_load(true); - unsigned char* data = stbi_load(filename, &width, &height, &nrComponents, 0); - if (data) - { - GLenum format; - if (nrComponents == 1) - format = GL_RED; - else if (nrComponents == 3) - format = GL_RGB; - else if (nrComponents == 4) - format = GL_RGBA; + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image); + glGenerateMipmap(GL_TEXTURE_2D); + SOIL_free_image_data(image); - glBindTexture(GL_TEXTURE_2D, textureID); - glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data); - glGenerateMipmap(GL_TEXTURE_2D); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - stbi_image_free(data); - } - else - { - std::cout << "Texture failed to load at path: " << filename << std::endl; - stbi_image_free(data); - } - - return textureID; + return id; } void Core::SetActiveTexture(GLuint textureID, const char * shaderVariableName, GLuint programID, int textureUnit) diff --git a/GrafikaProjekt/pliki/src/Texture.h b/GrafikaProjekt/pliki/src/Texture.h index 75b6ae2..910228e 100644 --- a/GrafikaProjekt/pliki/src/Texture.h +++ b/GrafikaProjekt/pliki/src/Texture.h @@ -1,9 +1,7 @@ #pragma once - + #include "glew.h" #include "freeglut.h" -#include -#include namespace Core { diff --git a/GrafikaProjekt/pliki/src/main.cpp b/GrafikaProjekt/pliki/src/main.cpp index 9d15b36..19dcf4c 100644 --- a/GrafikaProjekt/pliki/src/main.cpp +++ b/GrafikaProjekt/pliki/src/main.cpp @@ -1,100 +1,45 @@ -#define STB_IMAGE_IMPLEMENTATION - #include "glew.h" #include "freeglut.h" #include "glm.hpp" -#include "gtx/matrix_decompose.hpp" #include "ext.hpp" #include #include -#include +#include #include "Shader_Loader.h" #include "Render_Utils.h" #include "Camera.h" - - -#include "Box.cpp" -#include -#include -#include -//#include - -#include "stb_image.h" #include "Texture.h" -//obliczyc kwateriony nastepnie interpolowac. - - -std::vector keyPoints({ -glm::vec3(-711.745f, 89.9272f, -626.537f), -//glm::vec3(-711.745f, 91.9272f, -606.537f), -glm::vec3(-687.635f, 100.428f, -503.943f), -//glm::vec3(-721.365f, 103.613f, -598.223f), -glm::vec3(-667.635f, 128.428f, -433.943f), -glm::vec3(-547.654f, 180.445f, -401.846f), -glm::vec3(-365.357f, 261.268f, -304.93f), -glm::vec3(-346.51f, 146.605f, -85.3702f), -glm::vec3(-461.105f, 120.275f, 115.596f), -glm::vec3(-507.395f, 76.497f, 338.408f), -glm::vec3(-181.343f, 58.7994f, 403.918f), -glm::vec3(-148.073f, 72.7797f, 522.283f), -glm::vec3(-76.8437f, 85.1488f, 524.396f), -glm::vec3(-30.0008f, 81.3007f, 367.907f), -glm::vec3(20.808f, 117.73f, 109.607f), -glm::vec3(8.72873f, 135.983f, -130.435f), -glm::vec3(8.72873f, 115.983f, -132.435f), -glm::vec3(8.72873f, 104.983f, -132.435f), -glm::vec3(8.72873f, 100.983f, -132.435f), - }); - -std::vector keyRotation; - -int index = 0; -bool FOLLOW_CAR = false; - -GLuint program; -GLuint programTextureSpecular; +GLuint programColor; GLuint programTexture; -GLuint programSun; + Core::Shader_Loader shaderLoader; +Core::RenderContext shipContext; +Core::RenderContext sphereContext; - -Core::RenderContext armContext; - - -std::vector armContexts; - -std::vector city; - -std::vector car; - - +glm::vec3 cameraPos = glm::vec3(0, 0, 5); +glm::vec3 cameraDir; // Wektor "do przodu" kamery +glm::vec3 cameraSide; // Wektor "w bok" kamery float cameraAngle = 0; -glm::vec3 cameraSide; -glm::vec3 cameraDir; -glm::vec3 cameraPos = keyPoints[0] + glm::vec3(0, 10, -5); + +int lastMouseX, lastMouseY, mouseX, mouseY; glm::mat4 cameraMatrix, perspectiveMatrix; +glm::vec3 lightDir = glm::normalize(glm::vec3(1.0f, -0.9f, -1.0f)); +glm::quat rotation = glm::quat(1, 0, 0, 0); -float old_x, old_y = -1; -float delta_x, delta_y = 0; -glm::quat rotationCamera = glm::quat(1, 0, 0, 0); -//glm::quat rotation_y; -//glm::quat rotation_x;// = glm::angleAxis(glm::pi() * 0.25f, glm::vec3(0, 1, 0)); -glm::quat rotation_y = glm::normalize(glm::angleAxis(209 * 0.03f, glm::vec3(1, 0, 0))); -glm::quat rotation_x = glm::normalize(glm::angleAxis(307 * 0.03f, glm::vec3(0, 1, 0))); -float dy = 0; -float dx = 0; +GLuint textureAsteroid; void keyboard(unsigned char key, int x, int y) { - float angleSpeed = 0.5f; - float moveSpeed = 2.f; - switch (key) + + float angleSpeed = 0.1f; + float moveSpeed = 0.1f; + switch(key) { case 'z': cameraAngle -= angleSpeed; break; case 'x': cameraAngle += angleSpeed; break; @@ -102,306 +47,107 @@ void keyboard(unsigned char key, int x, int y) case 's': cameraPos -= cameraDir * moveSpeed; break; case 'd': cameraPos += cameraSide * moveSpeed; break; case 'a': cameraPos -= cameraSide * moveSpeed; break; - case '0': cameraPos = keyPoints[0] + glm::vec3(0, 3, 0); index = 0; break; - case 'e': index = (index + 1) % keyPoints.size(); cameraPos = keyPoints[index] + glm::vec3(-3, 20, -3); break; - case 'q': index = (keyPoints.size() + index - 1) % keyPoints.size(); cameraPos = keyPoints[index] + glm::vec3(-3, 20, -3); break; - case '1': FOLLOW_CAR = !FOLLOW_CAR; break; - case 'r': cameraPos = glm::vec3(0,0,1); break; } } -glm::vec3 lightDir = glm::normalize(glm::vec3(1, 1, 1)); - - void mouse(int x, int y) { - if (old_x >= 0) { - delta_x = x - old_x; - delta_y = y - old_y; - } - old_x = x; - old_y = y; + mouseX = lastMouseX - x; + mouseY = lastMouseY - y; + lastMouseX = x; + lastMouseY = y; } - glm::mat4 createCameraMatrix() { - auto rot_y = glm::angleAxis(delta_y * 0.03f, glm::vec3(1, 0, 0)); - auto rot_x = glm::angleAxis(delta_x * 0.03f, glm::vec3(0, 1, 0)); - - dy += delta_y; - dx += delta_x; - delta_x = 0; - delta_y = 0; - - rotation_x = glm::normalize(rot_x * rotation_x); - rotation_y = glm::normalize(rot_y * rotation_y); - - rotationCamera = glm::normalize(rotation_y * rotation_x); - - auto inverse_rot = glm::inverse(rotationCamera); - - cameraDir = inverse_rot * glm::vec3(0, 0, -1); - glm::vec3 up = glm::vec3(0, 1, 0); - cameraSide = inverse_rot * glm::vec3(1, 0, 0); - - glm::mat4 cameraTranslation; - cameraTranslation[3] = glm::vec4(-cameraPos, 1.0f); - - return glm::mat4_cast(rotationCamera) * cameraTranslation; -} -glm::mat4 animationMatrix(float time) { - float speed = 1.; - time = time * speed; - std::vector distances; - float timeStep = 0; - for (int i = 0; i < keyPoints.size() - 1; i++) { - timeStep += (keyPoints[i] - keyPoints[i + 1]).length(); - distances.push_back((keyPoints[i] - keyPoints[i + 1]).length()); - } - time = fmod(time, timeStep); - - //index of first keyPoint - int index = 0; - - while (distances[index] <= time) { - time = time - distances[index]; - index += 1; - } - - //t coefitient between 0 and 1 for interpolation - float t = time / distances[index]; - - int size = keyPoints.size()-1; - //replace with catmul rom - glm::vec3 pos = (keyPoints[std::max(0, index)] * t + keyPoints[std::min(size, index + 1)] * (1 - t)); - - - //implement corect animation - auto animationRotation = glm::quat(1,0,0,0); - - glm::mat4 result = glm::translate(pos) * glm::mat4_cast(animationRotation); - - - return result; - + rotation = glm::normalize(rotation * glm::angleAxis((float)(mouseX * 0.01), cameraDir) * glm::angleAxis((float)(mouseY * 0.01), cameraSide)); + mouseX = mouseY = 0; + cameraDir = glm::inverse(rotation) * glm::vec3(0, 0, -1); + cameraSide = glm::inverse(rotation) * glm::vec3(-1, 0, 0); + return Core::createViewMatrixQuat(cameraPos, rotation); } - -void drawObject(GLuint program, Core::RenderContext context, glm::mat4 modelMatrix) +void drawObjectColor(Core::RenderContext context, glm::mat4 modelMatrix, glm::vec3 color) { + GLuint program = programColor; + + glUseProgram(program); + + glUniform3f(glGetUniformLocation(program, "objectColor"), color.x, color.y, color.z); + glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); + glm::mat4 transformation = perspectiveMatrix * cameraMatrix * modelMatrix; - - + glUniformMatrix4fv(glGetUniformLocation(program, "modelViewProjectionMatrix"), 1, GL_FALSE, (float*)&transformation); glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, (float*)&modelMatrix); - glUniformMatrix4fv(glGetUniformLocation(program, "transformation"), 1, GL_FALSE, (float*)&transformation); - context.render(); + + Core::DrawContext(context); + + glUseProgram(0); } -void renderRecursive(std::vector& nodes) { - for (auto node : nodes) { - if (node.renderContexts.size() == 0) { - continue; - } +void drawObjectTexture(Core::RenderContext context, glm::mat4 modelMatrix, GLuint textureId) +{ + GLuint program = programTexture; - glm::mat4 transformation = node.matrix;//glm::mat4(); - auto currentNode = node; - while (currentNode.parent != -1) { - transformation *= currentNode.matrix; - currentNode = nodes[currentNode.parent]; - } - // dodaj odwolania do nadrzednych zmiennych - for (auto context : node.renderContexts) { - auto program = context.material->program; - glUseProgram(program); - glUniform3f(glGetUniformLocation(program, "cameraPos"), cameraPos.x, cameraPos.y, cameraPos.z); - context.material->init_data(); - drawObject(program, context, transformation); - } - } + glUseProgram(program); + glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); + Core::SetActiveTexture(textureId, "textureSampler", program, 0); + + glm::mat4 transformation = perspectiveMatrix * cameraMatrix * modelMatrix; + glUniformMatrix4fv(glGetUniformLocation(program, "modelViewProjectionMatrix"), 1, GL_FALSE, (float*)&transformation); + glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, (float*)&modelMatrix); + + Core::DrawContext(context); + + glUseProgram(0); } - -glm::mat4 followCarCamera(float time) { - glm::quat rotation_y = glm::normalize(glm::angleAxis(209 * 0.03f, glm::vec3(1, 0, 0))); - glm::quat rotation_x = glm::normalize(glm::angleAxis(3.14f, glm::vec3(0, 1, 0))); - auto pos = glm::vec3(2, 3, 8); - cameraPos = animationMatrix(time) * glm::vec4(pos, 1); - auto transformation = animationMatrix(time); - glm::vec3 scale; - glm::quat rrotation; - glm::vec3 translation; - glm::vec3 skew; - glm::vec4 perspective; - glm::decompose(transformation, scale, rrotation, translation, skew, perspective); - - return glm::translate(-pos) * glm::mat4_cast(rotation_y * rotation_x) * glm::inverse(transformation); - -} - void renderScene() { - // Aktualizacja macierzy widoku i rzutowania. Macierze sa przechowywane w zmiennych globalnych, bo uzywa ich funkcja drawObject. - // (Bardziej elegancko byloby przekazac je jako argumenty do funkcji, ale robimy tak dla uproszczenia kodu. - // Jest to mozliwe dzieki temu, ze macierze widoku i rzutowania sa takie same dla wszystkich obiektow!) + // Aktualizacja macierzy widoku i rzutowania cameraMatrix = createCameraMatrix(); - perspectiveMatrix = Core::createPerspectiveMatrix(0.1, 2000); - float time = glutGet(GLUT_ELAPSED_TIME) / 1000.f; + perspectiveMatrix = Core::createPerspectiveMatrix(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glClearColor(0.0f, 0.03f, 0.1f, 1.0f); + glClearColor(0.0f, 0.1f, 0.3f, 1.0f); + glm::mat4 shipInitialTransformation = glm::translate(glm::vec3(0,-0.25f,0)) * glm::rotate(glm::radians(180.0f), glm::vec3(0,1,0)) * glm::scale(glm::vec3(0.25f)); + glm::mat4 shipModelMatrix = glm::translate(cameraPos + cameraDir * 0.5f) * glm::mat4_cast(glm::inverse(rotation)) * shipInitialTransformation; + drawObjectColor(shipContext, shipModelMatrix, glm::vec3(0.6f)); + drawObjectTexture(sphereContext, glm::translate(glm::vec3(0,0,0)), textureAsteroid); - - - if (FOLLOW_CAR) { - cameraMatrix = followCarCamera(time); - } - - renderRecursive(city); - for (int i = 0; i < 30; i++) { - if (time > -10) { - car[0].matrix = animationMatrix(time + 15);; - renderRecursive(car); - time -= 3; - } - } - glUseProgram(0); glutSwapBuffers(); } +void loadModelToContext(std::string path, Core::RenderContext& context) +{ + Assimp::Importer import; + const aiScene* scene = import.ReadFile(path, aiProcess_Triangulate | aiProcess_CalcTangentSpace); - - -Core::Material* loadDiffuseMaterial(aiMaterial* material) { - aiString colorPath; - // use for loading textures - - material->Get(AI_MATKEY_TEXTURE(aiTextureType_DIFFUSE, 0), colorPath); - if (colorPath == aiString("")) { - return nullptr; - } - Core::DiffuseMaterial* result = new Core::DiffuseMaterial(); - result->texture = Core::LoadTexture(colorPath.C_Str()); - result->program = programTexture; - result->lightDir = lightDir; - - return result; -} - - -Core::Material* loadDiffuseSpecularMaterial(aiMaterial* material) { - aiString colorPath; - // use for loading textures - - material->Get(AI_MATKEY_TEXTURE(aiTextureType_DIFFUSE, 0), colorPath); - Core::DiffuseSpecularMaterial* result = new Core::DiffuseSpecularMaterial(); - result->texture = Core::LoadTexture(colorPath.C_Str()); - - - aiString specularPath; - material->Get(AI_MATKEY_TEXTURE(aiTextureType_SPECULAR, 0), specularPath); - result->textureSpecular = Core::LoadTexture(specularPath.C_Str()); - result->lightDir = lightDir; - result->program = programTextureSpecular; - - return result; -} - - -void loadRecusive(const aiScene* scene, aiNode* node, std::vector& nodes, std::vector materialsVector, int parentIndex) { - int index = nodes.size(); - nodes.push_back(Core::Node()); - nodes[index].parent = parentIndex; - nodes[index].matrix = Core::mat4_cast(node->mTransformation); - for (int i = 0; i < node->mNumMeshes; i++) { - Core::RenderContext context; - context.initFromAssimpMesh(scene->mMeshes[node->mMeshes[i]]); - context.material = materialsVector[scene->mMeshes[node->mMeshes[i]]->mMaterialIndex]; - nodes[index].renderContexts.push_back(context); - } - for (int i = 0; i < node->mNumChildren; i++) { - loadRecusive(scene, node->mChildren[i], nodes, materialsVector, index); - } -} -void loadRecusive(const aiScene* scene, std::vector& nodes, std::vector materialsVector) { - - loadRecusive(scene, scene->mRootNode, nodes, materialsVector, -1); -} - -void initModels() { - Assimp::Importer importer; - //replace to get more buildings, unrecomdnded - //const aiScene* scene = importer.ReadFile("models/blade-runner-style-cityscapes.fbx", aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_CalcTangentSpace); - const aiScene* scene = importer.ReadFile("models/city_small.fbx", aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_CalcTangentSpace); - // check for errors - if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) // if is Not Zero + if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) { - std::cout << "ERROR::ASSIMP:: " << importer.GetErrorString() << std::endl; + std::cout << "ERROR::ASSIMP::" << import.GetErrorString() << std::endl; return; } - - - - std::vector materialsVector; - - for (int i = 0; i < scene->mNumMaterials; i++) { - materialsVector.push_back(loadDiffuseSpecularMaterial(scene->mMaterials[i])); - } - loadRecusive(scene, city, materialsVector); - - - scene = importer.ReadFile("models/flying_car.fbx", aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_CalcTangentSpace); - - - // check for errors - if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) // if is Not Zero - { - std::cout << "ERROR::ASSIMP:: " << importer.GetErrorString() << std::endl; - return; - } - materialsVector.clear(); - - for (int i = 0; i < scene->mNumMaterials; i++) { - materialsVector.push_back(loadDiffuseMaterial(scene->mMaterials[i])); - } - loadRecusive(scene, car, materialsVector); - - - //Recovering points from fbx - //const aiScene* points = importer.ReadFile("models/path.fbx", aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_CalcTangentSpace); - - //auto root = points->mRootNode; - - //for (int i = 0; i < root->mNumChildren; i++) { - // auto node = root->mChildren[i]; - // std::cout << "glm::vec3(" << node->mTransformation.a4 << "f, " << node->mTransformation.b4 << "f, " << node->mTransformation.c4 << "f), " << std::endl; - // //std::cout << node->mName.C_Str() << std::endl; - //} -} - -void initKeyRoation() { + context.initFromAssimpMesh(scene->mMeshes[0]); } void init() { - + srand(time(0)); glEnable(GL_DEPTH_TEST); - program = shaderLoader.CreateProgram("shaders/shader_4_1.vert", "shaders/shader_4_1.frag"); - programTextureSpecular = shaderLoader.CreateProgram("shaders/shader_spec_tex.vert", "shaders/shader_spec_tex.frag"); - programTexture = shaderLoader.CreateProgram("shaders/shader_tex_2.vert", "shaders/shader_tex_2.frag"); - programSun = shaderLoader.CreateProgram("shaders/shader_4_sun.vert", "shaders/shader_4_sun.frag"); - - initModels(); - - initKeyRoation(); - + programColor = shaderLoader.CreateProgram("shaders/shader_color.vert", "shaders/shader_color.frag"); + programTexture = shaderLoader.CreateProgram("shaders/shader_tex.vert", "shaders/shader_tex.frag"); + loadModelToContext("models/spaceship.obj", shipContext); + loadModelToContext("models/sphere.obj", sphereContext); + textureAsteroid = Core::LoadTexture("textures/asteroid.png"); } void shutdown() { - shaderLoader.DeleteProgram(program); + shaderLoader.DeleteProgram(programColor); + shaderLoader.DeleteProgram(programTexture); } void idle() @@ -409,19 +155,18 @@ void idle() glutPostRedisplay(); } -int main(int argc, char** argv) +int main(int argc, char ** argv) { glutInit(&argc, argv); - glutSetOption(GLUT_MULTISAMPLE, 4); - glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA | GLUT_MULTISAMPLE); - glutInitWindowPosition(200, 300); - glutInitWindowSize(800, 800); + glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA); + glutInitWindowPosition(200, 200); + glutInitWindowSize(600, 600); glutCreateWindow("OpenGL Pierwszy Program"); glewInit(); init(); - glutPassiveMotionFunc(mouse); glutKeyboardFunc(keyboard); + glutPassiveMotionFunc(mouse); glutDisplayFunc(renderScene); glutIdleFunc(idle); diff --git a/GrafikaProjekt/pliki/src/main_10_1.cpp b/GrafikaProjekt/pliki/src/main_10_1.cpp deleted file mode 100644 index bb9f30f..0000000 --- a/GrafikaProjekt/pliki/src/main_10_1.cpp +++ /dev/null @@ -1,399 +0,0 @@ -#define STB_IMAGE_IMPLEMENTATION -#define GLM_FORCE_SWIZZLE -#define SHOW_RAY -#include "stb_image.h" - - -#include "glew.h" -#include "freeglut.h" -#include "glm.hpp" -#include "ext.hpp" -#include -#include -#include - -#include "Shader_Loader.h" -#include "Render_Utils.h" -#include "Camera.h" -#include "Texture.h" -#include "Physics.h" - - -bool DRAGING_ON = false; - -Core::Shader_Loader shaderLoader; -GLuint programColor; -GLuint programTexture, programRed; - -obj::Model planeModel, boxModel, sphereModel; -Core::RenderContext planeContext, boxContext, sphereContext; -Core::RayContext rayContext; -GLuint boxTexture, groundTexture; - -glm::vec3 cameraPos = glm::vec3(0, 5, 20); -glm::vec3 cameraDir; -glm::vec3 cameraSide; -float cameraAngle = 0; -glm::mat4 cameraMatrix, perspectiveMatrix; - -glm::vec3 lightDir = glm::normalize(glm::vec3(0.5, -1, -0.5)); - - -// Initalization of physical scene (PhysX) -Physics pxScene(9.8 /* gravity (m/s^2) */); - -// fixed timestep for stable and deterministic simulation -const double physicsStepTime = 1.f / 60.f; -double physicsTimeToProcess = 0; - -// physical objects -PxRigidStatic *planeBody = nullptr; -PxMaterial *planeMaterial = nullptr; -std::vector boxBodies; -PxMaterial *boxMaterial = nullptr; -PxRigidDynamic *sphereBody = nullptr; -PxMaterial *sphereMaterial = nullptr; - -struct GrabbedObject { - PxRigidDynamic* actor; - float distance; - PxVec3 newPos; - bool update = false; -} grabbedObject; - -// renderable objects (description of a single renderable instance) -struct Renderable { - Core::RenderContext *context; - glm::mat4 modelMatrix; - GLuint textureId; -}; -std::vector renderables; - -PxVec3 vec3ToPxVec(glm::vec3 vector) { - return PxVec3(vector.x, vector.y, vector.z); -} -glm::vec3 PxVecTovec3(PxVec3 vector) { - return glm::vec3(vector.x, vector.y, vector.z); -} - -// number of rows and columns of boxes the wall consists of -const int BOX_NUMBER = 10; - -void initRenderables() -{ - // load models - planeModel = obj::loadModelFromFile("models/plane.obj"); - boxModel = obj::loadModelFromFile("models/box.obj"); - sphereModel = obj::loadModelFromFile("models/sphere.obj"); - - planeContext.initFromOBJ(planeModel); - boxContext.initFromOBJ(boxModel); - sphereContext.initFromOBJ(sphereModel); - - - // load textures - groundTexture = Core::LoadTexture("textures/sand.jpg"); - boxTexture = Core::LoadTexture("textures/a.jpg"); - - // create ground - Renderable *ground = new Renderable(); - ground->context = &planeContext; - ground->textureId = groundTexture; - renderables.emplace_back(ground); - - for (int i = 0; i < BOX_NUMBER; i++){ - // create box - Renderable* box = new Renderable(); - box->context = &boxContext; - box->textureId = boxTexture; - renderables.emplace_back(box); - - } - -} - -void initPhysicsScene() -{ - //----------------------------------------------------------- - // TASKS - //----------------------------------------------------------- - // IMPORTANT: - // * to create objects use: pxScene.physics - // * to manage the scene use: pxScene.scene - - planeBody = pxScene.physics->createRigidStatic(PxTransformFromPlaneEquation(PxPlane(0, 1, 0, 0))); - planeMaterial = pxScene.physics->createMaterial(0.5, 0.3, 0.5); - PxShape* planeShape = pxScene.physics->createShape(PxPlaneGeometry(), *planeMaterial); - planeBody->attachShape(*planeShape); - planeShape->release(); - planeBody->userData = (void*)renderables[0]; - pxScene.scene->addActor(*planeBody); - boxMaterial = pxScene.physics->createMaterial(0.9, 0.5, 0.4); - - for (int i = 0; i < BOX_NUMBER; i++) { - auto pos = glm::linearRand(glm::vec2(-8.f, -8.f), glm::vec2(8.f, 8.f)); - auto x = pxScene.physics->createRigidDynamic(PxTransform(pos.x,3, pos.y)); - boxBodies.push_back(x); - PxShape* boxShape = pxScene.physics->createShape(PxBoxGeometry(1, 1, 1), *boxMaterial); - x->attachShape(*boxShape); - boxShape->release(); - x->userData = (void*)renderables[i + 1]; - pxScene.scene->addActor(*x); - } - -} - -void updateTransforms() -{ - // Here we retrieve the current transforms of the objects from the physical simulation. - auto actorFlags = PxActorTypeFlag::eRIGID_DYNAMIC | PxActorTypeFlag::eRIGID_STATIC; - PxU32 nbActors = pxScene.scene->getNbActors(actorFlags); - if (nbActors) - { - std::vector actors(nbActors); - pxScene.scene->getActors(actorFlags, (PxActor**)&actors[0], nbActors); - for (auto actor : actors) - { - // We use the userData of the objects to set up the model matrices - // of proper renderables. - if (!actor->userData) continue; - Renderable *renderable = (Renderable*)actor->userData; - - // get world matrix of the object (actor) - PxMat44 transform = actor->getGlobalPose(); - auto &c0 = transform.column0; - auto &c1 = transform.column1; - auto &c2 = transform.column2; - auto &c3 = transform.column3; - - // set up the model matrix used for the rendering - renderable->modelMatrix = glm::mat4( - c0.x, c0.y, c0.z, c0.w, - c1.x, c1.y, c1.z, c1.w, - c2.x, c2.y, c2.z, c2.w, - c3.x, c3.y, c3.z, c3.w); - } - } -} -std::vector calculate_ray(float x, float y) { - glm::vec2 screen_space_pos(x, y); - std::vector result; - - //here ray should be calculated - - result.push_back(cameraPos); - result.push_back(cameraDir); - return result; -} - -void keyboard(unsigned char key, int x, int y) -{ - float angleSpeed = 0.1f; - float moveSpeed = 0.1f; - switch (key) - { - case 'z': cameraAngle -= angleSpeed; break; - case 'x': cameraAngle += angleSpeed; break; - case 'w': cameraPos += cameraDir * moveSpeed; break; - case 's': cameraPos -= cameraDir * moveSpeed; break; - case 'd': cameraPos += cameraSide * moveSpeed; break; - case 'a': cameraPos -= cameraSide * moveSpeed; break; - } - - - int size_x = glutGet(GLUT_WINDOW_WIDTH); - int size_y = glutGet(GLUT_WINDOW_HEIGHT); - std::vector ray = calculate_ray((x / float(size_x) - 0.5) * 2, -((y / float(size_y)) - 0.5) * 2); - grabbedObject.newPos = vec3ToPxVec(ray[1]) * grabbedObject.distance + vec3ToPxVec(ray[0]); -} - - -void mouse(int x, int y) -{ - - int size_x = glutGet(GLUT_WINDOW_WIDTH); - int size_y = glutGet(GLUT_WINDOW_HEIGHT); - std::vector ray = calculate_ray((x / float(size_x) - 0.5) * 2, -((y / float(size_y)) - 0.5) * 2); - Core::updateRayPos(rayContext, ray); - grabbedObject.newPos = vec3ToPxVec(ray[1]) * grabbedObject.distance + vec3ToPxVec(ray[0]); - -} -void click_mouse(int button, int state, int x, int y) { - if ((GLUT_LEFT_BUTTON == button && state == GLUT_DOWN)) { - - int size_x = glutGet(GLUT_WINDOW_WIDTH); - int size_y = glutGet(GLUT_WINDOW_HEIGHT); - std::vector ray = calculate_ray((x / float(size_x) - 0.5) * 2, -((y / float(size_y)) - 0.5) * 2); - Core::updateRayPos(rayContext, ray); - - //here raycast should be done - - //check if there is a hit - if (false) { - - //check if it is rigid dynamic - if (false) { - } - } - else { - std::cout << "no hit\n"; - } - } - - if (GLUT_LEFT_BUTTON == button && state == GLUT_UP) { - DRAGING_ON = false; - grabbedObject.update = false; - } - -} - - - -glm::mat4 createCameraMatrix() -{ - cameraDir = glm::normalize(glm::vec3(cosf(cameraAngle - glm::radians(90.0f)), 0, sinf(cameraAngle - glm::radians(90.0f)))); - glm::vec3 up = glm::vec3(0, 1, 0); - cameraSide = glm::cross(cameraDir, up); - - return Core::createViewMatrix(cameraPos, cameraDir, up); -} - -void drawObjectColor(Core::RenderContext* context, glm::mat4 modelMatrix, glm::vec3 color) -{ - GLuint program = programColor; - - glUseProgram(program); - - glUniform3f(glGetUniformLocation(program, "objectColor"), color.x, color.y, color.z); - glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); - - glm::mat4 transformation = perspectiveMatrix * cameraMatrix * modelMatrix; - glUniformMatrix4fv(glGetUniformLocation(program, "modelViewProjectionMatrix"), 1, GL_FALSE, (float*)&transformation); - glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, (float*)&modelMatrix); - - context->render(); - - glUseProgram(0); -} - -void drawRay(Core::RayContext& context) { - glUseProgram(programRed); - - glm::mat4 transformation = perspectiveMatrix * cameraMatrix; - glUniformMatrix4fv(glGetUniformLocation(programRed, "modelViewProjectionMatrix"), 1, GL_FALSE, (float*)&transformation); - context.render(); - glUseProgram(0); -} - -void drawObjectTexture(Core::RenderContext * context, glm::mat4 modelMatrix, GLuint textureId) -{ - GLuint program = programTexture; - - glUseProgram(program); - - glUniform3f(glGetUniformLocation(program, "lightDir"), lightDir.x, lightDir.y, lightDir.z); - Core::SetActiveTexture(textureId, "textureSampler", program, 0); - - glm::mat4 transformation = perspectiveMatrix * cameraMatrix * modelMatrix; - glUniformMatrix4fv(glGetUniformLocation(program, "modelViewProjectionMatrix"), 1, GL_FALSE, (float*)&transformation); - glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, (float*)&modelMatrix); - - context->render(); - glUseProgram(0); -} - -void renderScene() -{ - - if (grabbedObject.update) { - // Here should be grab object update - } - - double time = glutGet(GLUT_ELAPSED_TIME) / 1000.0; - static double prevTime = time; - double dtime = time - prevTime; - prevTime = time; - - // Update physics - if (dtime < 1.f) { - physicsTimeToProcess += dtime; - while (physicsTimeToProcess > 0) { - // here we perform the physics simulation step - pxScene.step(physicsStepTime); - physicsTimeToProcess -= physicsStepTime; - } - } - - - // Update of camera and perspective matrices - cameraMatrix = createCameraMatrix(); - perspectiveMatrix = Core::createPerspectiveMatrix(); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glClearColor(0.0f, 0.1f, 0.3f, 1.0f); - - // update transforms from physics simulation - updateTransforms(); - - // render models - for (Renderable* renderable : renderables) { - drawObjectTexture(renderable->context, renderable->modelMatrix, renderable->textureId); - } - #ifdef SHOW_RAY - drawRay(rayContext); - #endif // SHOW_RAY - - - glutSwapBuffers(); -} - -void init() -{ - srand(time(0)); - glEnable(GL_DEPTH_TEST); - programColor = shaderLoader.CreateProgram("shaders/shader_color.vert", "shaders/shader_color.frag"); - programTexture = shaderLoader.CreateProgram("shaders/shader_tex.vert", "shaders/shader_tex.frag"); - programRed = shaderLoader.CreateProgram("shaders/shader_red.vert", "shaders/shader_red.frag"); - - - Core::initRay(rayContext); - auto ray = calculate_ray(0.5f,0.5f); - //Core::updateRayPos(rayContext, ray); - - initRenderables(); - initPhysicsScene(); -} - -void shutdown() -{ - shaderLoader.DeleteProgram(programColor); - shaderLoader.DeleteProgram(programTexture); -} - -void idle() -{ - glutPostRedisplay(); -} - -int main(int argc, char ** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA); - glutInitWindowPosition(200, 200); - glutInitWindowSize(600, 600); - glutCreateWindow("OpenGL + PhysX"); - glewInit(); - - init(); - glutKeyboardFunc(keyboard); - glutMotionFunc(mouse); - glutMouseFunc(click_mouse); - glutDisplayFunc(renderScene); - glutIdleFunc(idle); - - glutMainLoop(); - - shutdown(); - - return 0; -} diff --git a/GrafikaProjekt/pliki/src/mesh.h b/GrafikaProjekt/pliki/src/mesh.h deleted file mode 100644 index 33e81f9..0000000 --- a/GrafikaProjekt/pliki/src/mesh.h +++ /dev/null @@ -1,140 +0,0 @@ - - -#ifndef MESH_H -#define MESH_H - -#include "glew.h" -#include "freeglut.h" -#include "glm.hpp" -#include "ext.hpp" -#include -#include - -#include -#include -using namespace std; - -struct Vertex { - // position - glm::vec3 Position; - // normal - glm::vec3 Normal; - // texCoords - glm::vec2 TexCoords; - // tangent - glm::vec3 Tangent; - // bitangent - glm::vec3 Bitangent; -}; - -struct Texture { - unsigned int id; - string type; - string path; -}; - -class Mesh { -public: - // mesh Data - vector vertices; - vector indices; - vector textures; - glm::mat4 matrix; - unsigned int VAO; - - // constructor - Mesh(vector vertices, vector indices, vector textures,glm::mat4 matrix) - { - this->vertices = vertices; - this->indices = indices; - this->textures = textures; - this->matrix = matrix; - - // now that we have all the required data, set the vertex buffers and its attribute pointers. - setupMesh(); - } - - // render the mesh - void Draw(GLuint program) - { - // bind appropriate textures - unsigned int diffuseNr = 1; - unsigned int specularNr = 1; - unsigned int normalNr = 1; - unsigned int heightNr = 1; - for (unsigned int i = 0; i < textures.size(); i++) - { - glActiveTexture(GL_TEXTURE0 + i); // active proper texture unit before binding - // retrieve texture number (the N in diffuse_textureN) - string number; - string name = textures[i].type; - if (name == "texture_diffuse") - number = std::to_string(diffuseNr++); - else if (name == "texture_specular") - number = std::to_string(specularNr++); // transfer unsigned int to stream - else if (name == "texture_normal") - number = std::to_string(normalNr++); // transfer unsigned int to stream - else if (name == "texture_height") - number = std::to_string(heightNr++); // transfer unsigned int to stream - - // now set the sampler to the correct texture unit - glUniform1i(glGetUniformLocation(program, (name + number).c_str()), i); - // and finally bind the texture - glBindTexture(GL_TEXTURE_2D, textures[i].id); - } - - glUniformMatrix4fv(glGetUniformLocation(program, "model"), 1, GL_FALSE, (float*)&matrix); - // draw mesh - glBindVertexArray(VAO); - glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0); - glBindVertexArray(0); - - // always good practice to set everything back to defaults once configured. - glActiveTexture(GL_TEXTURE0); - } - -private: - // render data - unsigned int VBO, EBO; - - // initializes all the buffer objects/arrays - void setupMesh() - { - // create buffers/arrays - glGenVertexArrays(1, &VAO); - glGenBuffers(1, &VBO); - glGenBuffers(1, &EBO); - - glBindVertexArray(VAO); - // load data into vertex buffers - glBindBuffer(GL_ARRAY_BUFFER, VBO); - // A great thing about structs is that their memory layout is sequential for all its items. - // The effect is that we can simply pass a pointer to the struct and it translates perfectly to a glm::vec3/2 array which - // again translates to 3/2 floats which translates to a byte array. - glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), &vertices[0], GL_STATIC_DRAW); - - glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO); - glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW); - - // set the vertex attribute pointers - // vertex Positions - glEnableVertexAttribArray(0); - glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0); - // vertex normals - glEnableVertexAttribArray(1); - glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Normal)); - // vertex texture coords - glEnableVertexAttribArray(2); - glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, TexCoords)); - // vertex tangent - glEnableVertexAttribArray(3); - glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Tangent)); - // vertex bitangent - glEnableVertexAttribArray(4); - glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Bitangent)); - - glBindVertexArray(0); - } -}; -#endif - diff --git a/GrafikaProjekt/pliki/src/model.h b/GrafikaProjekt/pliki/src/model.h deleted file mode 100644 index ac8bf72..0000000 --- a/GrafikaProjekt/pliki/src/model.h +++ /dev/null @@ -1,250 +0,0 @@ -#pragma once - - - - -#include "glew.h" -#include "freeglut.h" -#include "glm.hpp" -#include "ext.hpp" -#include -#include -#include -#include -#include - -#include "stb_image.h" -#include "mesh.h" - -#include -#include -#include -#include -#include -#include -using namespace std; - - -unsigned int TextureFromFile(const char* path, const string& directory, bool gamma = false); - -class Model -{ -public: - // model data - vector textures_loaded; // stores all the textures loaded so far, optimization to make sure textures aren't loaded more than once. - vector meshes; - string directory; - bool gammaCorrection; - - // constructor, expects a filepath to a 3D model. - Model(string const& path, bool gamma = false) : gammaCorrection(gamma) - { - loadModel(path); - } - - // draws the model, and thus all its meshes - void Draw(GLuint shader) - { - for (unsigned int i = 0; i < meshes.size(); i++) - meshes[i].Draw(shader); - } - -private: - // loads a model with supported ASSIMP extensions from file and stores the resulting meshes in the meshes vector. - void loadModel(string const& path) - { - // read file via ASSIMP - Assimp::Importer importer; - const aiScene* scene = importer.ReadFile(path, aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_FlipUVs | aiProcess_CalcTangentSpace); - // check for errors - if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) // if is Not Zero - { - cout << "ERROR::ASSIMP:: " << importer.GetErrorString() << endl; - return; - } - // retrieve the directory path of the filepath - directory = path.substr(0, path.find_last_of('/')); - - // process ASSIMP's root node recursively - processNode(scene->mRootNode, scene,glm::mat4()); - } - - // processes a node in a recursive fashion. Processes each individual mesh located at the node and repeats this process on its children nodes (if any). - void processNode(aiNode* node, const aiScene* scene,glm::mat4 matrix) - { - glm::mat4 outMatrix = matrix * mat4_cast(node->mTransformation); - // process each mesh located at the current node - for (unsigned int i = 0; i < node->mNumMeshes; i++) - { - // the node object only contains indices to index the actual objects in the scene. - // the scene contains all the data, node is just to keep stuff organized (like relations between nodes). - aiMesh* mesh = scene->mMeshes[node->mMeshes[i]]; - meshes.push_back(processMesh(mesh, scene, outMatrix)); - } - // after we've processed all of the meshes (if any) we then recursively process each of the children nodes - for (unsigned int i = 0; i < node->mNumChildren; i++) - { - processNode(node->mChildren[i], scene, outMatrix); - } - - } - - Mesh processMesh(aiMesh* mesh, const aiScene* scene, glm::mat4 matrix) - { - // data to fill - vector vertices; - vector indices; - vector textures; - - // walk through each of the mesh's vertices - for (unsigned int i = 0; i < mesh->mNumVertices; i++) - { - Vertex vertex; - glm::vec3 vector; // we declare a placeholder vector since assimp uses its own vector class that doesn't directly convert to glm's vec3 class so we transfer the data to this placeholder glm::vec3 first. - // positions - vector.x = mesh->mVertices[i].x; - vector.y = mesh->mVertices[i].y; - vector.z = mesh->mVertices[i].z; - vertex.Position = vector; - // normals - if (mesh->HasNormals()) - { - vector.x = mesh->mNormals[i].x; - vector.y = mesh->mNormals[i].y; - vector.z = mesh->mNormals[i].z; - vertex.Normal = vector; - } - // texture coordinates - if (mesh->mTextureCoords[0]) // does the mesh contain texture coordinates? - { - glm::vec2 vec; - // a vertex can contain up to 8 different texture coordinates. We thus make the assumption that we won't - // use models where a vertex can have multiple texture coordinates so we always take the first set (0). - vec.x = mesh->mTextureCoords[0][i].x; - vec.y = mesh->mTextureCoords[0][i].y; - vertex.TexCoords = vec; - // tangent - vector.x = mesh->mTangents[i].x; - vector.y = mesh->mTangents[i].y; - vector.z = mesh->mTangents[i].z; - vertex.Tangent = vector; - // bitangent - vector.x = mesh->mBitangents[i].x; - vector.y = mesh->mBitangents[i].y; - vector.z = mesh->mBitangents[i].z; - vertex.Bitangent = vector; - } - else - vertex.TexCoords = glm::vec2(0.0f, 0.0f); - - vertices.push_back(vertex); - } - // now wak through each of the mesh's faces (a face is a mesh its triangle) and retrieve the corresponding vertex indices. - for (unsigned int i = 0; i < mesh->mNumFaces; i++) - { - aiFace face = mesh->mFaces[i]; - // retrieve all indices of the face and store them in the indices vector - for (unsigned int j = 0; j < face.mNumIndices; j++) - indices.push_back(face.mIndices[j]); - } - // process materials - aiMaterial* material = scene->mMaterials[mesh->mMaterialIndex]; - // we assume a convention for sampler names in the shaders. Each diffuse texture should be named - // as 'texture_diffuseN' where N is a sequential number ranging from 1 to MAX_SAMPLER_NUMBER. - // Same applies to other texture as the following list summarizes: - // diffuse: texture_diffuseN - // specular: texture_specularN - // normal: texture_normalN - - // 1. diffuse maps - vector diffuseMaps = loadMaterialTextures(material, aiTextureType_DIFFUSE, "texture_diffuse"); - textures.insert(textures.end(), diffuseMaps.begin(), diffuseMaps.end()); - // 2. specular maps - vector specularMaps = loadMaterialTextures(material, aiTextureType_SPECULAR, "texture_specular"); - textures.insert(textures.end(), specularMaps.begin(), specularMaps.end()); - // 3. normal maps - std::vector normalMaps = loadMaterialTextures(material, aiTextureType_HEIGHT, "texture_normal"); - textures.insert(textures.end(), normalMaps.begin(), normalMaps.end()); - // 4. height maps - std::vector heightMaps = loadMaterialTextures(material, aiTextureType_AMBIENT, "texture_height"); - textures.insert(textures.end(), heightMaps.begin(), heightMaps.end()); - - - // return a mesh object created from the extracted mesh data - return Mesh(vertices, indices, textures, matrix); - } - - // checks all material textures of a given type and loads the textures if they're not loaded yet. - // the required info is returned as a Texture struct. - vector loadMaterialTextures(aiMaterial* mat, aiTextureType type, string typeName) - { - vector textures; - for (unsigned int i = 0; i < mat->GetTextureCount(type); i++) - { - aiString str; - mat->GetTexture(type, i, &str); - // check if texture was loaded before and if so, continue to next iteration: skip loading a new texture - bool skip = false; - for (unsigned int j = 0; j < textures_loaded.size(); j++) - { - if (std::strcmp(textures_loaded[j].path.data(), str.C_Str()) == 0) - { - textures.push_back(textures_loaded[j]); - skip = true; // a texture with the same filepath has already been loaded, continue to next one. (optimization) - break; - } - } - if (!skip) - { // if texture hasn't been loaded already, load it - Texture texture; - texture.id = TextureFromFile(str.C_Str(), this->directory); - texture.type = typeName; - texture.path = str.C_Str(); - textures.push_back(texture); - textures_loaded.push_back(texture); // store it as texture loaded for entire model, to ensure we won't unnecesery load duplicate textures. - } - } - return textures; - } -}; - - -unsigned int TextureFromFile(const char* path, const string& directory, bool gamma) -{ - string filename = string(path); - filename = directory + '/' + filename; - - unsigned int textureID; - glGenTextures(1, &textureID); - - int width, height, nrComponents; - unsigned char* data = stbi_load(filename.c_str(), &width, &height, &nrComponents, 0); - if (data) - { - GLenum format; - if (nrComponents == 1) - format = GL_RED; - else if (nrComponents == 3) - format = GL_RGB; - else if (nrComponents == 4) - format = GL_RGBA; - - glBindTexture(GL_TEXTURE_2D, textureID); - glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data); - glGenerateMipmap(GL_TEXTURE_2D); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - stbi_image_free(data); - } - else - { - std::cout << "Texture failed to load at path: " << path << std::endl; - stbi_image_free(data); - } - - return textureID; -} \ No newline at end of file diff --git a/GrafikaProjekt/pliki/src/stb_image.h b/GrafikaProjekt/pliki/src/stb_image.h deleted file mode 100644 index accef48..0000000 --- a/GrafikaProjekt/pliki/src/stb_image.h +++ /dev/null @@ -1,7762 +0,0 @@ -/* stb_image - v2.26 - public domain image loader - http://nothings.org/stb - no warranty implied; use at your own risk - - Do this: - #define STB_IMAGE_IMPLEMENTATION - before you include this file in *one* C or C++ file to create the implementation. - - // i.e. it should look like this: - #include ... - #include ... - #include ... - #define STB_IMAGE_IMPLEMENTATION - #include "stb_image.h" - - You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. - And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free - - - QUICK NOTES: - Primarily of interest to game developers and other people who can - avoid problematic images and only need the trivial interface - - JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) - PNG 1/2/4/8/16-bit-per-channel - - TGA (not sure what subset, if a subset) - BMP non-1bpp, non-RLE - PSD (composited view only, no extra channels, 8/16 bit-per-channel) - - GIF (*comp always reports as 4-channel) - HDR (radiance rgbE format) - PIC (Softimage PIC) - PNM (PPM and PGM binary only) - - Animated GIF still needs a proper API, but here's one way to do it: - http://gist.github.com/urraka/685d9a6340b26b830d49 - - - decode from memory or through FILE (define STBI_NO_STDIO to remove code) - - decode from arbitrary I/O callbacks - - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) - - Full documentation under "DOCUMENTATION" below. - - -LICENSE - - See end of file for license information. - -RECENT REVISION HISTORY: - - 2.26 (2020-07-13) many minor fixes - 2.25 (2020-02-02) fix warnings - 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically - 2.23 (2019-08-11) fix clang static analysis warning - 2.22 (2019-03-04) gif fixes, fix warnings - 2.21 (2019-02-25) fix typo in comment - 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings - 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes - 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 - RGB-format JPEG; remove white matting in PSD; - allocate large structures on the stack; - correct channel count for PNG & BMP - 2.10 (2016-01-22) avoid warning introduced in 2.09 - 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED - - See end of file for full revision history. - - - ============================ Contributors ========================= - - Image formats Extensions, features - Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) - Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) - Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) - Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) - Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) - Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) - Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) - github:urraka (animated gif) Junggon Kim (PNM comments) - Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) - socks-the-fox (16-bit PNG) - Jeremy Sawicki (handle all ImageNet JPGs) - Optimizations & bugfixes Mikhail Morozov (1-bit BMP) - Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) - Arseny Kapoulkine - John-Mark Allen - Carmelo J Fdez-Aguera - - Bug & warning fixes - Marc LeBlanc David Woo Guillaume George Martins Mozeiko - Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski - Phil Jordan Dave Moore Roy Eltham - Hayaki Saito Nathan Reed Won Chun - Luke Graham Johan Duparc Nick Verigakis the Horde3D community - Thomas Ruf Ronny Chevalier github:rlyeh - Janez Zemva John Bartholomew Michal Cichon github:romigrou - Jonathan Blow Ken Hamada Tero Hanninen github:svdijk - Laurent Gomila Cort Stratton github:snagar - Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex - Cass Everitt Ryamond Barbiero github:grim210 - Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw - Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus - Josh Tobin Matthew Gregan github:poppolopoppo - Julian Raschke Gregory Mullen Christian Floisand github:darealshinji - Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 - Brad Weinberger Matvey Cherevko [reserved] - Luca Sas Alexander Veselov Zack Middleton [reserved] - Ryan C. Gordon [reserved] [reserved] - DO NOT ADD YOUR NAME HERE - - To add your name to the credits, pick a random blank space in the middle and fill it. - 80% of merge conflicts on stb PRs are due to people adding their name at the end - of the credits. -*/ - -#ifndef STBI_INCLUDE_STB_IMAGE_H -#define STBI_INCLUDE_STB_IMAGE_H - -// DOCUMENTATION -// -// Limitations: -// - no 12-bit-per-channel JPEG -// - no JPEGs with arithmetic coding -// - GIF always returns *comp=4 -// -// Basic usage (see HDR discussion below for HDR usage): -// int x,y,n; -// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); -// // ... process data if not NULL ... -// // ... x = width, y = height, n = # 8-bit components per pixel ... -// // ... replace '0' with '1'..'4' to force that many components per pixel -// // ... but 'n' will always be the number that it would have been if you said 0 -// stbi_image_free(data) -// -// Standard parameters: -// int *x -- outputs image width in pixels -// int *y -- outputs image height in pixels -// int *channels_in_file -- outputs # of image components in image file -// int desired_channels -- if non-zero, # of image components requested in result -// -// The return value from an image loader is an 'unsigned char *' which points -// to the pixel data, or NULL on an allocation failure or if the image is -// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, -// with each pixel consisting of N interleaved 8-bit components; the first -// pixel pointed to is top-left-most in the image. There is no padding between -// image scanlines or between pixels, regardless of format. The number of -// components N is 'desired_channels' if desired_channels is non-zero, or -// *channels_in_file otherwise. If desired_channels is non-zero, -// *channels_in_file has the number of components that _would_ have been -// output otherwise. E.g. if you set desired_channels to 4, you will always -// get RGBA output, but you can check *channels_in_file to see if it's trivially -// opaque because e.g. there were only 3 channels in the source image. -// -// An output image with N components has the following components interleaved -// in this order in each pixel: -// -// N=#comp components -// 1 grey -// 2 grey, alpha -// 3 red, green, blue -// 4 red, green, blue, alpha -// -// If image loading fails for any reason, the return value will be NULL, -// and *x, *y, *channels_in_file will be unchanged. The function -// stbi_failure_reason() can be queried for an extremely brief, end-user -// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS -// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly -// more user-friendly ones. -// -// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. -// -// =========================================================================== -// -// UNICODE: -// -// If compiling for Windows and you wish to use Unicode filenames, compile -// with -// #define STBI_WINDOWS_UTF8 -// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert -// Windows wchar_t filenames to utf8. -// -// =========================================================================== -// -// Philosophy -// -// stb libraries are designed with the following priorities: -// -// 1. easy to use -// 2. easy to maintain -// 3. good performance -// -// Sometimes I let "good performance" creep up in priority over "easy to maintain", -// and for best performance I may provide less-easy-to-use APIs that give higher -// performance, in addition to the easy-to-use ones. Nevertheless, it's important -// to keep in mind that from the standpoint of you, a client of this library, -// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. -// -// Some secondary priorities arise directly from the first two, some of which -// provide more explicit reasons why performance can't be emphasized. -// -// - Portable ("ease of use") -// - Small source code footprint ("easy to maintain") -// - No dependencies ("ease of use") -// -// =========================================================================== -// -// I/O callbacks -// -// I/O callbacks allow you to read from arbitrary sources, like packaged -// files or some other source. Data read from callbacks are processed -// through a small internal buffer (currently 128 bytes) to try to reduce -// overhead. -// -// The three functions you must define are "read" (reads some bytes of data), -// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). -// -// =========================================================================== -// -// SIMD support -// -// The JPEG decoder will try to automatically use SIMD kernels on x86 when -// supported by the compiler. For ARM Neon support, you must explicitly -// request it. -// -// (The old do-it-yourself SIMD API is no longer supported in the current -// code.) -// -// On x86, SSE2 will automatically be used when available based on a run-time -// test; if not, the generic C versions are used as a fall-back. On ARM targets, -// the typical path is to have separate builds for NEON and non-NEON devices -// (at least this is true for iOS and Android). Therefore, the NEON support is -// toggled by a build flag: define STBI_NEON to get NEON loops. -// -// If for some reason you do not want to use any of SIMD code, or if -// you have issues compiling it, you can disable it entirely by -// defining STBI_NO_SIMD. -// -// =========================================================================== -// -// HDR image support (disable by defining STBI_NO_HDR) -// -// stb_image supports loading HDR images in general, and currently the Radiance -// .HDR file format specifically. You can still load any file through the existing -// interface; if you attempt to load an HDR file, it will be automatically remapped -// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; -// both of these constants can be reconfigured through this interface: -// -// stbi_hdr_to_ldr_gamma(2.2f); -// stbi_hdr_to_ldr_scale(1.0f); -// -// (note, do not use _inverse_ constants; stbi_image will invert them -// appropriately). -// -// Additionally, there is a new, parallel interface for loading files as -// (linear) floats to preserve the full dynamic range: -// -// float *data = stbi_loadf(filename, &x, &y, &n, 0); -// -// If you load LDR images through this interface, those images will -// be promoted to floating point values, run through the inverse of -// constants corresponding to the above: -// -// stbi_ldr_to_hdr_scale(1.0f); -// stbi_ldr_to_hdr_gamma(2.2f); -// -// Finally, given a filename (or an open file or memory block--see header -// file for details) containing image data, you can query for the "most -// appropriate" interface to use (that is, whether the image is HDR or -// not), using: -// -// stbi_is_hdr(char *filename); -// -// =========================================================================== -// -// iPhone PNG support: -// -// By default we convert iphone-formatted PNGs back to RGB, even though -// they are internally encoded differently. You can disable this conversion -// by calling stbi_convert_iphone_png_to_rgb(0), in which case -// you will always just get the native iphone "format" through (which -// is BGR stored in RGB). -// -// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per -// pixel to remove any premultiplied alpha *only* if the image file explicitly -// says there's premultiplied data (currently only happens in iPhone images, -// and only if iPhone convert-to-rgb processing is on). -// -// =========================================================================== -// -// ADDITIONAL CONFIGURATION -// -// - You can suppress implementation of any of the decoders to reduce -// your code footprint by #defining one or more of the following -// symbols before creating the implementation. -// -// STBI_NO_JPEG -// STBI_NO_PNG -// STBI_NO_BMP -// STBI_NO_PSD -// STBI_NO_TGA -// STBI_NO_GIF -// STBI_NO_HDR -// STBI_NO_PIC -// STBI_NO_PNM (.ppm and .pgm) -// -// - You can request *only* certain decoders and suppress all other ones -// (this will be more forward-compatible, as addition of new decoders -// doesn't require you to disable them explicitly): -// -// STBI_ONLY_JPEG -// STBI_ONLY_PNG -// STBI_ONLY_BMP -// STBI_ONLY_PSD -// STBI_ONLY_TGA -// STBI_ONLY_GIF -// STBI_ONLY_HDR -// STBI_ONLY_PIC -// STBI_ONLY_PNM (.ppm and .pgm) -// -// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still -// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB -// -// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater -// than that size (in either width or height) without further processing. -// This is to let programs in the wild set an upper bound to prevent -// denial-of-service attacks on untrusted data, as one could generate a -// valid image of gigantic dimensions and force stb_image to allocate a -// huge block of memory and spend disproportionate time decoding it. By -// default this is set to (1 << 24), which is 16777216, but that's still -// very big. - -#ifndef STBI_NO_STDIO -#include -#endif // STBI_NO_STDIO - -#define STBI_VERSION 1 - -enum -{ - STBI_default = 0, // only used for desired_channels - - STBI_grey = 1, - STBI_grey_alpha = 2, - STBI_rgb = 3, - STBI_rgb_alpha = 4 -}; - -#include -typedef unsigned char stbi_uc; -typedef unsigned short stbi_us; - -#ifdef __cplusplus -extern "C" { -#endif - -#ifndef STBIDEF -#ifdef STB_IMAGE_STATIC -#define STBIDEF static -#else -#define STBIDEF extern -#endif -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// PRIMARY API - works on images of any type -// - -// -// load image by filename, open file, or memory buffer -// - -typedef struct -{ - int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read - void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative - int (*eof) (void *user); // returns nonzero if we are at end of file/data -} stbi_io_callbacks; - -//////////////////////////////////// -// -// 8-bits-per-channel interface -// - -STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO -STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); -// for stbi_load_from_file, file pointer is left pointing immediately after image -#endif - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp); -#endif - -#ifdef STBI_WINDOWS_UTF8 -STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); -#endif - -//////////////////////////////////// -// -// 16-bits-per-channel interface -// - -STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO -STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); -STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); -#endif - -//////////////////////////////////// -// -// float-per-channel interface -// -#ifndef STBI_NO_LINEAR - STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); - STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); - - #ifndef STBI_NO_STDIO - STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); - STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); - #endif -#endif - -#ifndef STBI_NO_HDR - STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); - STBIDEF void stbi_hdr_to_ldr_scale(float scale); -#endif // STBI_NO_HDR - -#ifndef STBI_NO_LINEAR - STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); - STBIDEF void stbi_ldr_to_hdr_scale(float scale); -#endif // STBI_NO_LINEAR - -// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr (char const *filename); -STBIDEF int stbi_is_hdr_from_file(FILE *f); -#endif // STBI_NO_STDIO - - -// get a VERY brief reason for failure -// on most compilers (and ALL modern mainstream compilers) this is threadsafe -STBIDEF const char *stbi_failure_reason (void); - -// free the loaded image -- this is just free() -STBIDEF void stbi_image_free (void *retval_from_stbi_load); - -// get image dimensions & components without fully decoding -STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len); -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user); - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); -STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); -STBIDEF int stbi_is_16_bit (char const *filename); -STBIDEF int stbi_is_16_bit_from_file(FILE *f); -#endif - - - -// for image formats that explicitly notate that they have premultiplied alpha, -// we just return the colors as stored in the file. set this flag to force -// unpremultiplication. results are undefined if the unpremultiply overflow. -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); - -// indicate whether we should process iphone images back to canonical format, -// or just pass them through "as-is" -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); - -// flip the image vertically, so the first pixel in the output array is the bottom left -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); - -// as above, but only applies to images loaded on the thread that calls the function -// this function is only available if your compiler supports thread-local variables; -// calling it will fail to link if your compiler doesn't -STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); - -// ZLIB client - used by PNG, available for other purposes - -STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); -STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header); -STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); -STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); - -STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); -STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); - - -#ifdef __cplusplus -} -#endif - -// -// -//// end header file ///////////////////////////////////////////////////// -#endif // STBI_INCLUDE_STB_IMAGE_H - -#ifdef STB_IMAGE_IMPLEMENTATION - -#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ - || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ - || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ - || defined(STBI_ONLY_ZLIB) - #ifndef STBI_ONLY_JPEG - #define STBI_NO_JPEG - #endif - #ifndef STBI_ONLY_PNG - #define STBI_NO_PNG - #endif - #ifndef STBI_ONLY_BMP - #define STBI_NO_BMP - #endif - #ifndef STBI_ONLY_PSD - #define STBI_NO_PSD - #endif - #ifndef STBI_ONLY_TGA - #define STBI_NO_TGA - #endif - #ifndef STBI_ONLY_GIF - #define STBI_NO_GIF - #endif - #ifndef STBI_ONLY_HDR - #define STBI_NO_HDR - #endif - #ifndef STBI_ONLY_PIC - #define STBI_NO_PIC - #endif - #ifndef STBI_ONLY_PNM - #define STBI_NO_PNM - #endif -#endif - -#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) -#define STBI_NO_ZLIB -#endif - - -#include -#include // ptrdiff_t on osx -#include -#include -#include - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -#include // ldexp, pow -#endif - -#ifndef STBI_NO_STDIO -#include -#endif - -#ifndef STBI_ASSERT -#include -#define STBI_ASSERT(x) assert(x) -#endif - -#ifdef __cplusplus -#define STBI_EXTERN extern "C" -#else -#define STBI_EXTERN extern -#endif - - -#ifndef _MSC_VER - #ifdef __cplusplus - #define stbi_inline inline - #else - #define stbi_inline - #endif -#else - #define stbi_inline __forceinline -#endif - -#ifndef STBI_NO_THREAD_LOCALS - #if defined(__cplusplus) && __cplusplus >= 201103L - #define STBI_THREAD_LOCAL thread_local - #elif defined(__GNUC__) && __GNUC__ < 5 - #define STBI_THREAD_LOCAL __thread - #elif defined(_MSC_VER) - #define STBI_THREAD_LOCAL __declspec(thread) - #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__) - #define STBI_THREAD_LOCAL _Thread_local - #endif - - #ifndef STBI_THREAD_LOCAL - #if defined(__GNUC__) - #define STBI_THREAD_LOCAL __thread - #endif - #endif -#endif - -#ifdef _MSC_VER -typedef unsigned short stbi__uint16; -typedef signed short stbi__int16; -typedef unsigned int stbi__uint32; -typedef signed int stbi__int32; -#else -#include -typedef uint16_t stbi__uint16; -typedef int16_t stbi__int16; -typedef uint32_t stbi__uint32; -typedef int32_t stbi__int32; -#endif - -// should produce compiler error if size is wrong -typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; - -#ifdef _MSC_VER -#define STBI_NOTUSED(v) (void)(v) -#else -#define STBI_NOTUSED(v) (void)sizeof(v) -#endif - -#ifdef _MSC_VER -#define STBI_HAS_LROTL -#endif - -#ifdef STBI_HAS_LROTL - #define stbi_lrot(x,y) _lrotl(x,y) -#else - #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) -#endif - -#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) -// ok -#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) -// ok -#else -#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." -#endif - -#ifndef STBI_MALLOC -#define STBI_MALLOC(sz) malloc(sz) -#define STBI_REALLOC(p,newsz) realloc(p,newsz) -#define STBI_FREE(p) free(p) -#endif - -#ifndef STBI_REALLOC_SIZED -#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) -#endif - -// x86/x64 detection -#if defined(__x86_64__) || defined(_M_X64) -#define STBI__X64_TARGET -#elif defined(__i386) || defined(_M_IX86) -#define STBI__X86_TARGET -#endif - -#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) -// gcc doesn't support sse2 intrinsics unless you compile with -msse2, -// which in turn means it gets to use SSE2 everywhere. This is unfortunate, -// but previous attempts to provide the SSE2 functions with runtime -// detection caused numerous issues. The way architecture extensions are -// exposed in GCC/Clang is, sadly, not really suited for one-file libs. -// New behavior: if compiled with -msse2, we use SSE2 without any -// detection; if not, we don't use it at all. -#define STBI_NO_SIMD -#endif - -#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) -// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET -// -// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the -// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. -// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not -// simultaneously enabling "-mstackrealign". -// -// See https://github.com/nothings/stb/issues/81 for more information. -// -// So default to no SSE2 on 32-bit MinGW. If you've read this far and added -// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. -#define STBI_NO_SIMD -#endif - -#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) -#define STBI_SSE2 -#include - -#ifdef _MSC_VER - -#if _MSC_VER >= 1400 // not VC6 -#include // __cpuid -static int stbi__cpuid3(void) -{ - int info[4]; - __cpuid(info,1); - return info[3]; -} -#else -static int stbi__cpuid3(void) -{ - int res; - __asm { - mov eax,1 - cpuid - mov res,edx - } - return res; -} -#endif - -#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name - -#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) -static int stbi__sse2_available(void) -{ - int info3 = stbi__cpuid3(); - return ((info3 >> 26) & 1) != 0; -} -#endif - -#else // assume GCC-style if not VC++ -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) - -#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) -static int stbi__sse2_available(void) -{ - // If we're even attempting to compile this on GCC/Clang, that means - // -msse2 is on, which means the compiler is allowed to use SSE2 - // instructions at will, and so are we. - return 1; -} -#endif - -#endif -#endif - -// ARM NEON -#if defined(STBI_NO_SIMD) && defined(STBI_NEON) -#undef STBI_NEON -#endif - -#ifdef STBI_NEON -#include -// assume GCC or Clang on ARM targets -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) -#endif - -#ifndef STBI_SIMD_ALIGN -#define STBI_SIMD_ALIGN(type, name) type name -#endif - -#ifndef STBI_MAX_DIMENSIONS -#define STBI_MAX_DIMENSIONS (1 << 24) -#endif - -/////////////////////////////////////////////// -// -// stbi__context struct and start_xxx functions - -// stbi__context structure is our basic context used by all images, so it -// contains all the IO context, plus some basic image information -typedef struct -{ - stbi__uint32 img_x, img_y; - int img_n, img_out_n; - - stbi_io_callbacks io; - void *io_user_data; - - int read_from_callbacks; - int buflen; - stbi_uc buffer_start[128]; - int callback_already_read; - - stbi_uc *img_buffer, *img_buffer_end; - stbi_uc *img_buffer_original, *img_buffer_original_end; -} stbi__context; - - -static void stbi__refill_buffer(stbi__context *s); - -// initialize a memory-decode context -static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) -{ - s->io.read = NULL; - s->read_from_callbacks = 0; - s->callback_already_read = 0; - s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; - s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; -} - -// initialize a callback-based context -static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user) -{ - s->io = *c; - s->io_user_data = user; - s->buflen = sizeof(s->buffer_start); - s->read_from_callbacks = 1; - s->callback_already_read = 0; - s->img_buffer = s->img_buffer_original = s->buffer_start; - stbi__refill_buffer(s); - s->img_buffer_original_end = s->img_buffer_end; -} - -#ifndef STBI_NO_STDIO - -static int stbi__stdio_read(void *user, char *data, int size) -{ - return (int) fread(data,1,size,(FILE*) user); -} - -static void stbi__stdio_skip(void *user, int n) -{ - int ch; - fseek((FILE*) user, n, SEEK_CUR); - ch = fgetc((FILE*) user); /* have to read a byte to reset feof()'s flag */ - if (ch != EOF) { - ungetc(ch, (FILE *) user); /* push byte back onto stream if valid. */ - } -} - -static int stbi__stdio_eof(void *user) -{ - return feof((FILE*) user) || ferror((FILE *) user); -} - -static stbi_io_callbacks stbi__stdio_callbacks = -{ - stbi__stdio_read, - stbi__stdio_skip, - stbi__stdio_eof, -}; - -static void stbi__start_file(stbi__context *s, FILE *f) -{ - stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f); -} - -//static void stop_file(stbi__context *s) { } - -#endif // !STBI_NO_STDIO - -static void stbi__rewind(stbi__context *s) -{ - // conceptually rewind SHOULD rewind to the beginning of the stream, - // but we just rewind to the beginning of the initial buffer, because - // we only use it after doing 'test', which only ever looks at at most 92 bytes - s->img_buffer = s->img_buffer_original; - s->img_buffer_end = s->img_buffer_original_end; -} - -enum -{ - STBI_ORDER_RGB, - STBI_ORDER_BGR -}; - -typedef struct -{ - int bits_per_channel; - int num_channels; - int channel_order; -} stbi__result_info; - -#ifndef STBI_NO_JPEG -static int stbi__jpeg_test(stbi__context *s); -static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PNG -static int stbi__png_test(stbi__context *s); -static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); -static int stbi__png_is16(stbi__context *s); -#endif - -#ifndef STBI_NO_BMP -static int stbi__bmp_test(stbi__context *s); -static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_TGA -static int stbi__tga_test(stbi__context *s); -static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context *s); -static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc); -static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); -static int stbi__psd_is16(stbi__context *s); -#endif - -#ifndef STBI_NO_HDR -static int stbi__hdr_test(stbi__context *s); -static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_test(stbi__context *s); -static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_GIF -static int stbi__gif_test(stbi__context *s); -static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp); -static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -#ifndef STBI_NO_PNM -static int stbi__pnm_test(stbi__context *s); -static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); -static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); -#endif - -static -#ifdef STBI_THREAD_LOCAL -STBI_THREAD_LOCAL -#endif -const char *stbi__g_failure_reason; - -STBIDEF const char *stbi_failure_reason(void) -{ - return stbi__g_failure_reason; -} - -#ifndef STBI_NO_FAILURE_STRINGS -static int stbi__err(const char *str) -{ - stbi__g_failure_reason = str; - return 0; -} -#endif - -static void *stbi__malloc(size_t size) -{ - return STBI_MALLOC(size); -} - -// stb_image uses ints pervasively, including for offset calculations. -// therefore the largest decoded image size we can support with the -// current code, even on 64-bit targets, is INT_MAX. this is not a -// significant limitation for the intended use case. -// -// we do, however, need to make sure our size calculations don't -// overflow. hence a few helper functions for size calculations that -// multiply integers together, making sure that they're non-negative -// and no overflow occurs. - -// return 1 if the sum is valid, 0 on overflow. -// negative terms are considered invalid. -static int stbi__addsizes_valid(int a, int b) -{ - if (b < 0) return 0; - // now 0 <= b <= INT_MAX, hence also - // 0 <= INT_MAX - b <= INTMAX. - // And "a + b <= INT_MAX" (which might overflow) is the - // same as a <= INT_MAX - b (no overflow) - return a <= INT_MAX - b; -} - -// returns 1 if the product is valid, 0 on overflow. -// negative factors are considered invalid. -static int stbi__mul2sizes_valid(int a, int b) -{ - if (a < 0 || b < 0) return 0; - if (b == 0) return 1; // mul-by-0 is always safe - // portable way to check for no overflows in a*b - return a <= INT_MAX/b; -} - -#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) -// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow -static int stbi__mad2sizes_valid(int a, int b, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add); -} -#endif - -// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow -static int stbi__mad3sizes_valid(int a, int b, int c, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && - stbi__addsizes_valid(a*b*c, add); -} - -// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && - stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add); -} -#endif - -#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) -// mallocs with size overflow checking -static void *stbi__malloc_mad2(int a, int b, int add) -{ - if (!stbi__mad2sizes_valid(a, b, add)) return NULL; - return stbi__malloc(a*b + add); -} -#endif - -static void *stbi__malloc_mad3(int a, int b, int c, int add) -{ - if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; - return stbi__malloc(a*b*c + add); -} - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) -{ - if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; - return stbi__malloc(a*b*c*d + add); -} -#endif - -// stbi__err - error -// stbi__errpf - error returning pointer to float -// stbi__errpuc - error returning pointer to unsigned char - -#ifdef STBI_NO_FAILURE_STRINGS - #define stbi__err(x,y) 0 -#elif defined(STBI_FAILURE_USERMSG) - #define stbi__err(x,y) stbi__err(y) -#else - #define stbi__err(x,y) stbi__err(x) -#endif - -#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) -#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) - -STBIDEF void stbi_image_free(void *retval_from_stbi_load) -{ - STBI_FREE(retval_from_stbi_load); -} - -#ifndef STBI_NO_LINEAR -static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp); -#endif - -#ifndef STBI_NO_HDR -static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp); -#endif - -static int stbi__vertically_flip_on_load_global = 0; - -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load_global = flag_true_if_should_flip; -} - -#ifndef STBI_THREAD_LOCAL -#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global -#else -static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set; - -STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load_local = flag_true_if_should_flip; - stbi__vertically_flip_on_load_set = 1; -} - -#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set \ - ? stbi__vertically_flip_on_load_local \ - : stbi__vertically_flip_on_load_global) -#endif // STBI_THREAD_LOCAL - -static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) -{ - memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields - ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed - ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order - ri->num_channels = 0; - - #ifndef STBI_NO_JPEG - if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_PNG - if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_BMP - if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_GIF - if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_PSD - if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc); - #else - STBI_NOTUSED(bpc); - #endif - #ifndef STBI_NO_PIC - if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); - #endif - #ifndef STBI_NO_PNM - if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); - #endif - - #ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri); - return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } - #endif - - #ifndef STBI_NO_TGA - // test tga last because it's a crappy test! - if (stbi__tga_test(s)) - return stbi__tga_load(s,x,y,comp,req_comp, ri); - #endif - - return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); -} - -static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi_uc *reduced; - - reduced = (stbi_uc *) stbi__malloc(img_len); - if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling - - STBI_FREE(orig); - return reduced; -} - -static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi__uint16 *enlarged; - - enlarged = (stbi__uint16 *) stbi__malloc(img_len*2); - if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff - - STBI_FREE(orig); - return enlarged; -} - -static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel) -{ - int row; - size_t bytes_per_row = (size_t)w * bytes_per_pixel; - stbi_uc temp[2048]; - stbi_uc *bytes = (stbi_uc *)image; - - for (row = 0; row < (h>>1); row++) { - stbi_uc *row0 = bytes + row*bytes_per_row; - stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row; - // swap row0 with row1 - size_t bytes_left = bytes_per_row; - while (bytes_left) { - size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); - memcpy(temp, row0, bytes_copy); - memcpy(row0, row1, bytes_copy); - memcpy(row1, temp, bytes_copy); - row0 += bytes_copy; - row1 += bytes_copy; - bytes_left -= bytes_copy; - } - } -} - -#ifndef STBI_NO_GIF -static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel) -{ - int slice; - int slice_size = w * h * bytes_per_pixel; - - stbi_uc *bytes = (stbi_uc *)image; - for (slice = 0; slice < z; ++slice) { - stbi__vertical_flip(bytes, w, h, bytes_per_pixel); - bytes += slice_size; - } -} -#endif - -static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - stbi__result_info ri; - void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); - - if (result == NULL) - return NULL; - - // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. - STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); - - if (ri.bits_per_channel != 8) { - result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 8; - } - - // @TODO: move stbi__convert_format to here - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); - } - - return (unsigned char *) result; -} - -static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - stbi__result_info ri; - void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); - - if (result == NULL) - return NULL; - - // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. - STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); - - if (ri.bits_per_channel != 16) { - result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 16; - } - - // @TODO: move stbi__convert_format16 to here - // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); - } - - return (stbi__uint16 *) result; -} - -#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) -static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) -{ - if (stbi__vertically_flip_on_load && result != NULL) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); - } -} -#endif - -#ifndef STBI_NO_STDIO - -#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) -STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); -STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); -#endif - -#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) -STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) -{ - return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); -} -#endif - -static FILE *stbi__fopen(char const *filename, char const *mode) -{ - FILE *f; -#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) - wchar_t wMode[64]; - wchar_t wFilename[1024]; - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename))) - return 0; - - if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode))) - return 0; - -#if _MSC_VER >= 1400 - if (0 != _wfopen_s(&f, wFilename, wMode)) - f = 0; -#else - f = _wfopen(wFilename, wMode); -#endif - -#elif defined(_MSC_VER) && _MSC_VER >= 1400 - if (0 != fopen_s(&f, filename, mode)) - f=0; -#else - f = fopen(filename, mode); -#endif - return f; -} - - -STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - unsigned char *result; - if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file(f,x,y,comp,req_comp); - fclose(f); - return result; -} - -STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - unsigned char *result; - stbi__context s; - stbi__start_file(&s,f); - result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi__uint16 *result; - stbi__context s; - stbi__start_file(&s,f); - result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - stbi__uint16 *result; - if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file_16(f,x,y,comp,req_comp); - fclose(f); - return result; -} - - -#endif //!STBI_NO_STDIO - -STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); -} - -STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); - return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); -} - -STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); -} - -STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); -} - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp) -{ - unsigned char *result; - stbi__context s; - stbi__start_mem(&s,buffer,len); - - result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); - if (stbi__vertically_flip_on_load) { - stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); - } - - return result; -} -#endif - -#ifndef STBI_NO_LINEAR -static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) -{ - unsigned char *data; - #ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - stbi__result_info ri; - float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri); - if (hdr_data) - stbi__float_postprocess(hdr_data,x,y,comp,req_comp); - return hdr_data; - } - #endif - data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); - if (data) - return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); -} - -STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} - -STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} - -#ifndef STBI_NO_STDIO -STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) -{ - float *result; - FILE *f = stbi__fopen(filename, "rb"); - if (!f) return stbi__errpf("can't fopen", "Unable to open file"); - result = stbi_loadf_from_file(f,x,y,comp,req_comp); - fclose(f); - return result; -} - -STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) -{ - stbi__context s; - stbi__start_file(&s,f); - return stbi__loadf_main(&s,x,y,comp,req_comp); -} -#endif // !STBI_NO_STDIO - -#endif // !STBI_NO_LINEAR - -// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is -// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always -// reports false! - -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) -{ - #ifndef STBI_NO_HDR - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__hdr_test(&s); - #else - STBI_NOTUSED(buffer); - STBI_NOTUSED(len); - return 0; - #endif -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr (char const *filename) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result=0; - if (f) { - result = stbi_is_hdr_from_file(f); - fclose(f); - } - return result; -} - -STBIDEF int stbi_is_hdr_from_file(FILE *f) -{ - #ifndef STBI_NO_HDR - long pos = ftell(f); - int res; - stbi__context s; - stbi__start_file(&s,f); - res = stbi__hdr_test(&s); - fseek(f, pos, SEEK_SET); - return res; - #else - STBI_NOTUSED(f); - return 0; - #endif -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) -{ - #ifndef STBI_NO_HDR - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); - return stbi__hdr_test(&s); - #else - STBI_NOTUSED(clbk); - STBI_NOTUSED(user); - return 0; - #endif -} - -#ifndef STBI_NO_LINEAR -static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; - -STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } -STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } -#endif - -static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; - -STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } -STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } - - -////////////////////////////////////////////////////////////////////////////// -// -// Common code used by all image loaders -// - -enum -{ - STBI__SCAN_load=0, - STBI__SCAN_type, - STBI__SCAN_header -}; - -static void stbi__refill_buffer(stbi__context *s) -{ - int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); - s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original); - if (n == 0) { - // at end of file, treat same as if from memory, but need to handle case - // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file - s->read_from_callbacks = 0; - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start+1; - *s->img_buffer = 0; - } else { - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + n; - } -} - -stbi_inline static stbi_uc stbi__get8(stbi__context *s) -{ - if (s->img_buffer < s->img_buffer_end) - return *s->img_buffer++; - if (s->read_from_callbacks) { - stbi__refill_buffer(s); - return *s->img_buffer++; - } - return 0; -} - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -stbi_inline static int stbi__at_eof(stbi__context *s) -{ - if (s->io.read) { - if (!(s->io.eof)(s->io_user_data)) return 0; - // if feof() is true, check if buffer = end - // special case: we've only got the special 0 character at the end - if (s->read_from_callbacks == 0) return 1; - } - - return s->img_buffer >= s->img_buffer_end; -} -#endif - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) -// nothing -#else -static void stbi__skip(stbi__context *s, int n) -{ - if (n == 0) return; // already there! - if (n < 0) { - s->img_buffer = s->img_buffer_end; - return; - } - if (s->io.read) { - int blen = (int) (s->img_buffer_end - s->img_buffer); - if (blen < n) { - s->img_buffer = s->img_buffer_end; - (s->io.skip)(s->io_user_data, n - blen); - return; - } - } - s->img_buffer += n; -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM) -// nothing -#else -static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n) -{ - if (s->io.read) { - int blen = (int) (s->img_buffer_end - s->img_buffer); - if (blen < n) { - int res, count; - - memcpy(buffer, s->img_buffer, blen); - - count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); - res = (count == (n-blen)); - s->img_buffer = s->img_buffer_end; - return res; - } - } - - if (s->img_buffer+n <= s->img_buffer_end) { - memcpy(buffer, s->img_buffer, n); - s->img_buffer += n; - return 1; - } else - return 0; -} -#endif - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) -// nothing -#else -static int stbi__get16be(stbi__context *s) -{ - int z = stbi__get8(s); - return (z << 8) + stbi__get8(s); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) -// nothing -#else -static stbi__uint32 stbi__get32be(stbi__context *s) -{ - stbi__uint32 z = stbi__get16be(s); - return (z << 16) + stbi__get16be(s); -} -#endif - -#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) -// nothing -#else -static int stbi__get16le(stbi__context *s) -{ - int z = stbi__get8(s); - return z + (stbi__get8(s) << 8); -} -#endif - -#ifndef STBI_NO_BMP -static stbi__uint32 stbi__get32le(stbi__context *s) -{ - stbi__uint32 z = stbi__get16le(s); - return z + (stbi__get16le(s) << 16); -} -#endif - -#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings - -#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -////////////////////////////////////////////////////////////////////////////// -// -// generic converter from built-in img_n to req_comp -// individual types do this automatically as much as possible (e.g. jpeg -// does all cases internally since it needs to colorspace convert anyway, -// and it never has alpha, so very few cases ). png can automatically -// interleave an alpha=255 channel, but falls back to this for other cases -// -// assume data buffer is malloced, so malloc a new one and free that one -// only failure mode is malloc failing - -static stbi_uc stbi__compute_y(int r, int g, int b) -{ - return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) -// nothing -#else -static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i,j; - unsigned char *good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0); - if (good == NULL) { - STBI_FREE(data); - return stbi__errpuc("outofmem", "Out of memory"); - } - - for (j=0; j < (int) y; ++j) { - unsigned char *src = data + j * x * img_n ; - unsigned char *dest = good + j * x * req_comp; - - #define STBI__COMBO(a,b) ((a)*8+(b)) - #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break; - STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break; - STBI__CASE(2,1) { dest[0]=src[0]; } break; - STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; - STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break; - STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; - STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break; - STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; - STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break; - STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; - default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion"); - } - #undef STBI__CASE - } - - STBI_FREE(data); - return good; -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) -// nothing -#else -static stbi__uint16 stbi__compute_y_16(int r, int g, int b) -{ - return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8); -} -#endif - -#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) -// nothing -#else -static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i,j; - stbi__uint16 *good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); - if (good == NULL) { - STBI_FREE(data); - return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); - } - - for (j=0; j < (int) y; ++j) { - stbi__uint16 *src = data + j * x * img_n ; - stbi__uint16 *dest = good + j * x * req_comp; - - #define STBI__COMBO(a,b) ((a)*8+(b)) - #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break; - STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break; - STBI__CASE(2,1) { dest[0]=src[0]; } break; - STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; - STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; - STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break; - STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; - STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break; - STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; - STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break; - STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; - default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion"); - } - #undef STBI__CASE - } - - STBI_FREE(data); - return good; -} -#endif - -#ifndef STBI_NO_LINEAR -static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) -{ - int i,k,n; - float *output; - if (!data) return NULL; - output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp-1; - for (i=0; i < x*y; ++i) { - for (k=0; k < n; ++k) { - output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale); - } - } - if (n < comp) { - for (i=0; i < x*y; ++i) { - output[i*comp + n] = data[i*comp + n]/255.0f; - } - } - STBI_FREE(data); - return output; -} -#endif - -#ifndef STBI_NO_HDR -#define stbi__float2int(x) ((int) (x)) -static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) -{ - int i,k,n; - stbi_uc *output; - if (!data) return NULL; - output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp-1; - for (i=0; i < x*y; ++i) { - for (k=0; k < n; ++k) { - float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i*comp + k] = (stbi_uc) stbi__float2int(z); - } - if (k < comp) { - float z = data[i*comp+k] * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i*comp + k] = (stbi_uc) stbi__float2int(z); - } - } - STBI_FREE(data); - return output; -} -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// "baseline" JPEG/JFIF decoder -// -// simple implementation -// - doesn't support delayed output of y-dimension -// - simple interface (only one output format: 8-bit interleaved RGB) -// - doesn't try to recover corrupt jpegs -// - doesn't allow partial loading, loading multiple at once -// - still fast on x86 (copying globals into locals doesn't help x86) -// - allocates lots of intermediate memory (full size of all components) -// - non-interleaved case requires this anyway -// - allows good upsampling (see next) -// high-quality -// - upsampled channels are bilinearly interpolated, even across blocks -// - quality integer IDCT derived from IJG's 'slow' -// performance -// - fast huffman; reasonable integer IDCT -// - some SIMD kernels for common paths on targets with SSE2/NEON -// - uses a lot of intermediate memory, could cache poorly - -#ifndef STBI_NO_JPEG - -// huffman decoding acceleration -#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache - -typedef struct -{ - stbi_uc fast[1 << FAST_BITS]; - // weirdly, repacking this into AoS is a 10% speed loss, instead of a win - stbi__uint16 code[256]; - stbi_uc values[256]; - stbi_uc size[257]; - unsigned int maxcode[18]; - int delta[17]; // old 'firstsymbol' - old 'firstcode' -} stbi__huffman; - -typedef struct -{ - stbi__context *s; - stbi__huffman huff_dc[4]; - stbi__huffman huff_ac[4]; - stbi__uint16 dequant[4][64]; - stbi__int16 fast_ac[4][1 << FAST_BITS]; - -// sizes for components, interleaved MCUs - int img_h_max, img_v_max; - int img_mcu_x, img_mcu_y; - int img_mcu_w, img_mcu_h; - -// definition of jpeg image component - struct - { - int id; - int h,v; - int tq; - int hd,ha; - int dc_pred; - - int x,y,w2,h2; - stbi_uc *data; - void *raw_data, *raw_coeff; - stbi_uc *linebuf; - short *coeff; // progressive only - int coeff_w, coeff_h; // number of 8x8 coefficient blocks - } img_comp[4]; - - stbi__uint32 code_buffer; // jpeg entropy-coded buffer - int code_bits; // number of valid bits - unsigned char marker; // marker seen while filling entropy buffer - int nomore; // flag if we saw a marker so must stop - - int progressive; - int spec_start; - int spec_end; - int succ_high; - int succ_low; - int eob_run; - int jfif; - int app14_color_transform; // Adobe APP14 tag - int rgb; - - int scan_n, order[4]; - int restart_interval, todo; - -// kernels - void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]); - void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step); - stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs); -} stbi__jpeg; - -static int stbi__build_huffman(stbi__huffman *h, int *count) -{ - int i,j,k=0; - unsigned int code; - // build size list for each symbol (from JPEG spec) - for (i=0; i < 16; ++i) - for (j=0; j < count[i]; ++j) - h->size[k++] = (stbi_uc) (i+1); - h->size[k] = 0; - - // compute actual symbols (from jpeg spec) - code = 0; - k = 0; - for(j=1; j <= 16; ++j) { - // compute delta to add to code to compute symbol id - h->delta[j] = k - code; - if (h->size[k] == j) { - while (h->size[k] == j) - h->code[k++] = (stbi__uint16) (code++); - if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG"); - } - // compute largest code + 1 for this size, preshifted as needed later - h->maxcode[j] = code << (16-j); - code <<= 1; - } - h->maxcode[j] = 0xffffffff; - - // build non-spec acceleration table; 255 is flag for not-accelerated - memset(h->fast, 255, 1 << FAST_BITS); - for (i=0; i < k; ++i) { - int s = h->size[i]; - if (s <= FAST_BITS) { - int c = h->code[i] << (FAST_BITS-s); - int m = 1 << (FAST_BITS-s); - for (j=0; j < m; ++j) { - h->fast[c+j] = (stbi_uc) i; - } - } - } - return 1; -} - -// build a table that decodes both magnitude and value of small ACs in -// one go. -static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) -{ - int i; - for (i=0; i < (1 << FAST_BITS); ++i) { - stbi_uc fast = h->fast[i]; - fast_ac[i] = 0; - if (fast < 255) { - int rs = h->values[fast]; - int run = (rs >> 4) & 15; - int magbits = rs & 15; - int len = h->size[fast]; - - if (magbits && len + magbits <= FAST_BITS) { - // magnitude code followed by receive_extend code - int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); - int m = 1 << (magbits - 1); - if (k < m) k += (~0U << magbits) + 1; - // if the result is small enough, we can fit it in fast_ac table - if (k >= -128 && k <= 127) - fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits)); - } - } - } -} - -static void stbi__grow_buffer_unsafe(stbi__jpeg *j) -{ - do { - unsigned int b = j->nomore ? 0 : stbi__get8(j->s); - if (b == 0xff) { - int c = stbi__get8(j->s); - while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes - if (c != 0) { - j->marker = (unsigned char) c; - j->nomore = 1; - return; - } - } - j->code_buffer |= b << (24 - j->code_bits); - j->code_bits += 8; - } while (j->code_bits <= 24); -} - -// (1 << n) - 1 -static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; - -// decode a jpeg huffman value from the bitstream -stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) -{ - unsigned int temp; - int c,k; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - // look at the top FAST_BITS and determine what symbol ID it is, - // if the code is <= FAST_BITS - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - k = h->fast[c]; - if (k < 255) { - int s = h->size[k]; - if (s > j->code_bits) - return -1; - j->code_buffer <<= s; - j->code_bits -= s; - return h->values[k]; - } - - // naive test is to shift the code_buffer down so k bits are - // valid, then test against maxcode. To speed this up, we've - // preshifted maxcode left so that it has (16-k) 0s at the - // end; in other words, regardless of the number of bits, it - // wants to be compared against something shifted to have 16; - // that way we don't need to shift inside the loop. - temp = j->code_buffer >> 16; - for (k=FAST_BITS+1 ; ; ++k) - if (temp < h->maxcode[k]) - break; - if (k == 17) { - // error! code not found - j->code_bits -= 16; - return -1; - } - - if (k > j->code_bits) - return -1; - - // convert the huffman code to the symbol id - c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; - STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); - - // convert the id to a symbol - j->code_bits -= k; - j->code_buffer <<= k; - return h->values[c]; -} - -// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); - - sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB - k = stbi_lrot(j->code_buffer, n); - if (n < 0 || n >= (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))) return 0; - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k + (stbi__jbias[n] & ~sgn); -} - -// get some unsigned bits -stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n) -{ - unsigned int k; - if (j->code_bits < n) stbi__grow_buffer_unsafe(j); - k = stbi_lrot(j->code_buffer, n); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k; -} - -stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j) -{ - unsigned int k; - if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); - k = j->code_buffer; - j->code_buffer <<= 1; - --j->code_bits; - return k & 0x80000000; -} - -// given a value that's at position X in the zigzag stream, -// where does it appear in the 8x8 matrix coded as row-major? -static const stbi_uc stbi__jpeg_dezigzag[64+15] = -{ - 0, 1, 8, 16, 9, 2, 3, 10, - 17, 24, 32, 25, 18, 11, 4, 5, - 12, 19, 26, 33, 40, 48, 41, 34, - 27, 20, 13, 6, 7, 14, 21, 28, - 35, 42, 49, 56, 57, 50, 43, 36, - 29, 22, 15, 23, 30, 37, 44, 51, - 58, 59, 52, 45, 38, 31, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, - // let corrupt input sample past end - 63, 63, 63, 63, 63, 63, 63, 63, - 63, 63, 63, 63, 63, 63, 63 -}; - -// decode one 64-entry block-- -static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant) -{ - int diff,dc,k; - int t; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - t = stbi__jpeg_huff_decode(j, hdc); - if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - - // 0 all the ac values now so we can do it 32-bits at a time - memset(data,0,64*sizeof(data[0])); - - diff = t ? stbi__extend_receive(j, t) : 0; - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short) (dc * dequant[0]); - - // decode AC components, see JPEG spec - k = 1; - do { - unsigned int zig; - int c,r,s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) ((r >> 8) * dequant[zig]); - } else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (rs != 0xf0) break; // end block - k += 16; - } else { - k += r; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]); - } - } - } while (k < 64); - return 1; -} - -static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b) -{ - int diff,dc; - int t; - if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - if (j->succ_high == 0) { - // first scan for DC coefficient, must be first - memset(data,0,64*sizeof(data[0])); // 0 all the ac values now - t = stbi__jpeg_huff_decode(j, hdc); - if (t == -1) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - diff = t ? stbi__extend_receive(j, t) : 0; - - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short) (dc << j->succ_low); - } else { - // refinement scan for DC coefficient - if (stbi__jpeg_get_bit(j)) - data[0] += (short) (1 << j->succ_low); - } - return 1; -} - -// @OPTIMIZE: store non-zigzagged during the decode passes, -// and only de-zigzag when dequantizing -static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac) -{ - int k; - if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->succ_high == 0) { - int shift = j->succ_low; - - if (j->eob_run) { - --j->eob_run; - return 1; - } - - k = j->spec_start; - do { - unsigned int zig; - int c,r,s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) ((r >> 8) << shift); - } else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r); - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - --j->eob_run; - break; - } - k += 16; - } else { - k += r; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short) (stbi__extend_receive(j,s) << shift); - } - } - } while (k <= j->spec_end); - } else { - // refinement scan for these AC coefficients - - short bit = (short) (1 << j->succ_low); - - if (j->eob_run) { - --j->eob_run; - for (k = j->spec_start; k <= j->spec_end; ++k) { - short *p = &data[stbi__jpeg_dezigzag[k]]; - if (*p != 0) - if (stbi__jpeg_get_bit(j)) - if ((*p & bit)==0) { - if (*p > 0) - *p += bit; - else - *p -= bit; - } - } - } else { - k = j->spec_start; - do { - int r,s; - int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh - if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r) - 1; - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - r = 64; // force end of block - } else { - // r=15 s=0 should write 16 0s, so we just do - // a run of 15 0s and then write s (which is 0), - // so we don't have to do anything special here - } - } else { - if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); - // sign bit - if (stbi__jpeg_get_bit(j)) - s = bit; - else - s = -bit; - } - - // advance by r - while (k <= j->spec_end) { - short *p = &data[stbi__jpeg_dezigzag[k++]]; - if (*p != 0) { - if (stbi__jpeg_get_bit(j)) - if ((*p & bit)==0) { - if (*p > 0) - *p += bit; - else - *p -= bit; - } - } else { - if (r == 0) { - *p = (short) s; - break; - } - --r; - } - } - } while (k <= j->spec_end); - } - } - return 1; -} - -// take a -128..127 value and stbi__clamp it and convert to 0..255 -stbi_inline static stbi_uc stbi__clamp(int x) -{ - // trick to use a single test to catch both cases - if ((unsigned int) x > 255) { - if (x < 0) return 0; - if (x > 255) return 255; - } - return (stbi_uc) x; -} - -#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) -#define stbi__fsh(x) ((x) * 4096) - -// derived from jidctint -- DCT_ISLOW -#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ - int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ - p2 = s2; \ - p3 = s6; \ - p1 = (p2+p3) * stbi__f2f(0.5411961f); \ - t2 = p1 + p3*stbi__f2f(-1.847759065f); \ - t3 = p1 + p2*stbi__f2f( 0.765366865f); \ - p2 = s0; \ - p3 = s4; \ - t0 = stbi__fsh(p2+p3); \ - t1 = stbi__fsh(p2-p3); \ - x0 = t0+t3; \ - x3 = t0-t3; \ - x1 = t1+t2; \ - x2 = t1-t2; \ - t0 = s7; \ - t1 = s5; \ - t2 = s3; \ - t3 = s1; \ - p3 = t0+t2; \ - p4 = t1+t3; \ - p1 = t0+t3; \ - p2 = t1+t2; \ - p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ - t0 = t0*stbi__f2f( 0.298631336f); \ - t1 = t1*stbi__f2f( 2.053119869f); \ - t2 = t2*stbi__f2f( 3.072711026f); \ - t3 = t3*stbi__f2f( 1.501321110f); \ - p1 = p5 + p1*stbi__f2f(-0.899976223f); \ - p2 = p5 + p2*stbi__f2f(-2.562915447f); \ - p3 = p3*stbi__f2f(-1.961570560f); \ - p4 = p4*stbi__f2f(-0.390180644f); \ - t3 += p1+p4; \ - t2 += p2+p3; \ - t1 += p2+p4; \ - t0 += p1+p3; - -static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64]) -{ - int i,val[64],*v=val; - stbi_uc *o; - short *d = data; - - // columns - for (i=0; i < 8; ++i,++d, ++v) { - // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing - if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 - && d[40]==0 && d[48]==0 && d[56]==0) { - // no shortcut 0 seconds - // (1|2|3|4|5|6|7)==0 0 seconds - // all separate -0.047 seconds - // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds - int dcterm = d[0]*4; - v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; - } else { - STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56]) - // constants scaled things up by 1<<12; let's bring them back - // down, but keep 2 extra bits of precision - x0 += 512; x1 += 512; x2 += 512; x3 += 512; - v[ 0] = (x0+t3) >> 10; - v[56] = (x0-t3) >> 10; - v[ 8] = (x1+t2) >> 10; - v[48] = (x1-t2) >> 10; - v[16] = (x2+t1) >> 10; - v[40] = (x2-t1) >> 10; - v[24] = (x3+t0) >> 10; - v[32] = (x3-t0) >> 10; - } - } - - for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { - // no fast case since the first 1D IDCT spread components out - STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) - // constants scaled things up by 1<<12, plus we had 1<<2 from first - // loop, plus horizontal and vertical each scale by sqrt(8) so together - // we've got an extra 1<<3, so 1<<17 total we need to remove. - // so we want to round that, which means adding 0.5 * 1<<17, - // aka 65536. Also, we'll end up with -128 to 127 that we want - // to encode as 0..255 by adding 128, so we'll add that before the shift - x0 += 65536 + (128<<17); - x1 += 65536 + (128<<17); - x2 += 65536 + (128<<17); - x3 += 65536 + (128<<17); - // tried computing the shifts into temps, or'ing the temps to see - // if any were out of range, but that was slower - o[0] = stbi__clamp((x0+t3) >> 17); - o[7] = stbi__clamp((x0-t3) >> 17); - o[1] = stbi__clamp((x1+t2) >> 17); - o[6] = stbi__clamp((x1-t2) >> 17); - o[2] = stbi__clamp((x2+t1) >> 17); - o[5] = stbi__clamp((x2-t1) >> 17); - o[3] = stbi__clamp((x3+t0) >> 17); - o[4] = stbi__clamp((x3-t0) >> 17); - } -} - -#ifdef STBI_SSE2 -// sse2 integer IDCT. not the fastest possible implementation but it -// produces bit-identical results to the generic C version so it's -// fully "transparent". -static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) -{ - // This is constructed to match our regular (generic) integer IDCT exactly. - __m128i row0, row1, row2, row3, row4, row5, row6, row7; - __m128i tmp; - - // dot product constant: even elems=x, odd elems=y - #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) - - // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) - // out(1) = c1[even]*x + c1[odd]*y - #define dct_rot(out0,out1, x,y,c0,c1) \ - __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ - __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ - __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ - __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ - __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ - __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) - - // out = in << 12 (in 16-bit, out 32-bit) - #define dct_widen(out, in) \ - __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ - __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) - - // wide add - #define dct_wadd(out, a, b) \ - __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_add_epi32(a##_h, b##_h) - - // wide sub - #define dct_wsub(out, a, b) \ - __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) - - // butterfly a/b, add bias, then shift by "s" and pack - #define dct_bfly32o(out0, out1, a,b,bias,s) \ - { \ - __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ - __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ - dct_wadd(sum, abiased, b); \ - dct_wsub(dif, abiased, b); \ - out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ - out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ - } - - // 8-bit interleave step (for transposes) - #define dct_interleave8(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi8(a, b); \ - b = _mm_unpackhi_epi8(tmp, b) - - // 16-bit interleave step (for transposes) - #define dct_interleave16(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi16(a, b); \ - b = _mm_unpackhi_epi16(tmp, b) - - #define dct_pass(bias,shift) \ - { \ - /* even part */ \ - dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ - __m128i sum04 = _mm_add_epi16(row0, row4); \ - __m128i dif04 = _mm_sub_epi16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ - dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ - __m128i sum17 = _mm_add_epi16(row1, row7); \ - __m128i sum35 = _mm_add_epi16(row3, row5); \ - dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ - dct_wadd(x4, y0o, y4o); \ - dct_wadd(x5, y1o, y5o); \ - dct_wadd(x6, y2o, y5o); \ - dct_wadd(x7, y3o, y4o); \ - dct_bfly32o(row0,row7, x0,x7,bias,shift); \ - dct_bfly32o(row1,row6, x1,x6,bias,shift); \ - dct_bfly32o(row2,row5, x2,x5,bias,shift); \ - dct_bfly32o(row3,row4, x3,x4,bias,shift); \ - } - - __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); - __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f)); - __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); - __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); - __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f)); - __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f)); - __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f)); - __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f)); - - // rounding biases in column/row passes, see stbi__idct_block for explanation. - __m128i bias_0 = _mm_set1_epi32(512); - __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17)); - - // load - row0 = _mm_load_si128((const __m128i *) (data + 0*8)); - row1 = _mm_load_si128((const __m128i *) (data + 1*8)); - row2 = _mm_load_si128((const __m128i *) (data + 2*8)); - row3 = _mm_load_si128((const __m128i *) (data + 3*8)); - row4 = _mm_load_si128((const __m128i *) (data + 4*8)); - row5 = _mm_load_si128((const __m128i *) (data + 5*8)); - row6 = _mm_load_si128((const __m128i *) (data + 6*8)); - row7 = _mm_load_si128((const __m128i *) (data + 7*8)); - - // column pass - dct_pass(bias_0, 10); - - { - // 16bit 8x8 transpose pass 1 - dct_interleave16(row0, row4); - dct_interleave16(row1, row5); - dct_interleave16(row2, row6); - dct_interleave16(row3, row7); - - // transpose pass 2 - dct_interleave16(row0, row2); - dct_interleave16(row1, row3); - dct_interleave16(row4, row6); - dct_interleave16(row5, row7); - - // transpose pass 3 - dct_interleave16(row0, row1); - dct_interleave16(row2, row3); - dct_interleave16(row4, row5); - dct_interleave16(row6, row7); - } - - // row pass - dct_pass(bias_1, 17); - - { - // pack - __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 - __m128i p1 = _mm_packus_epi16(row2, row3); - __m128i p2 = _mm_packus_epi16(row4, row5); - __m128i p3 = _mm_packus_epi16(row6, row7); - - // 8bit 8x8 transpose pass 1 - dct_interleave8(p0, p2); // a0e0a1e1... - dct_interleave8(p1, p3); // c0g0c1g1... - - // transpose pass 2 - dct_interleave8(p0, p1); // a0c0e0g0... - dct_interleave8(p2, p3); // b0d0f0h0... - - // transpose pass 3 - dct_interleave8(p0, p2); // a0b0c0d0... - dct_interleave8(p1, p3); // a4b4c4d4... - - // store - _mm_storel_epi64((__m128i *) out, p0); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p2); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p1); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i *) out, p3); out += out_stride; - _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e)); - } - -#undef dct_const -#undef dct_rot -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_interleave8 -#undef dct_interleave16 -#undef dct_pass -} - -#endif // STBI_SSE2 - -#ifdef STBI_NEON - -// NEON integer IDCT. should produce bit-identical -// results to the generic C version. -static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) -{ - int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; - - int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); - int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); - int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f)); - int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f)); - int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); - int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); - int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); - int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); - int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f)); - int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f)); - int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f)); - int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f)); - -#define dct_long_mul(out, inq, coeff) \ - int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) - -#define dct_long_mac(out, acc, inq, coeff) \ - int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) - -#define dct_widen(out, inq) \ - int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ - int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) - -// wide add -#define dct_wadd(out, a, b) \ - int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vaddq_s32(a##_h, b##_h) - -// wide sub -#define dct_wsub(out, a, b) \ - int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vsubq_s32(a##_h, b##_h) - -// butterfly a/b, then shift using "shiftop" by "s" and pack -#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ - { \ - dct_wadd(sum, a, b); \ - dct_wsub(dif, a, b); \ - out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ - out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ - } - -#define dct_pass(shiftop, shift) \ - { \ - /* even part */ \ - int16x8_t sum26 = vaddq_s16(row2, row6); \ - dct_long_mul(p1e, sum26, rot0_0); \ - dct_long_mac(t2e, p1e, row6, rot0_1); \ - dct_long_mac(t3e, p1e, row2, rot0_2); \ - int16x8_t sum04 = vaddq_s16(row0, row4); \ - int16x8_t dif04 = vsubq_s16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - int16x8_t sum15 = vaddq_s16(row1, row5); \ - int16x8_t sum17 = vaddq_s16(row1, row7); \ - int16x8_t sum35 = vaddq_s16(row3, row5); \ - int16x8_t sum37 = vaddq_s16(row3, row7); \ - int16x8_t sumodd = vaddq_s16(sum17, sum35); \ - dct_long_mul(p5o, sumodd, rot1_0); \ - dct_long_mac(p1o, p5o, sum17, rot1_1); \ - dct_long_mac(p2o, p5o, sum35, rot1_2); \ - dct_long_mul(p3o, sum37, rot2_0); \ - dct_long_mul(p4o, sum15, rot2_1); \ - dct_wadd(sump13o, p1o, p3o); \ - dct_wadd(sump24o, p2o, p4o); \ - dct_wadd(sump23o, p2o, p3o); \ - dct_wadd(sump14o, p1o, p4o); \ - dct_long_mac(x4, sump13o, row7, rot3_0); \ - dct_long_mac(x5, sump24o, row5, rot3_1); \ - dct_long_mac(x6, sump23o, row3, rot3_2); \ - dct_long_mac(x7, sump14o, row1, rot3_3); \ - dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ - dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ - dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ - dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ - } - - // load - row0 = vld1q_s16(data + 0*8); - row1 = vld1q_s16(data + 1*8); - row2 = vld1q_s16(data + 2*8); - row3 = vld1q_s16(data + 3*8); - row4 = vld1q_s16(data + 4*8); - row5 = vld1q_s16(data + 5*8); - row6 = vld1q_s16(data + 6*8); - row7 = vld1q_s16(data + 7*8); - - // add DC bias - row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); - - // column pass - dct_pass(vrshrn_n_s32, 10); - - // 16bit 8x8 transpose - { -// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. -// whether compilers actually get this is another story, sadly. -#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } -#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } - - // pass 1 - dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 - dct_trn16(row2, row3); - dct_trn16(row4, row5); - dct_trn16(row6, row7); - - // pass 2 - dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 - dct_trn32(row1, row3); - dct_trn32(row4, row6); - dct_trn32(row5, row7); - - // pass 3 - dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 - dct_trn64(row1, row5); - dct_trn64(row2, row6); - dct_trn64(row3, row7); - -#undef dct_trn16 -#undef dct_trn32 -#undef dct_trn64 - } - - // row pass - // vrshrn_n_s32 only supports shifts up to 16, we need - // 17. so do a non-rounding shift of 16 first then follow - // up with a rounding shift by 1. - dct_pass(vshrn_n_s32, 16); - - { - // pack and round - uint8x8_t p0 = vqrshrun_n_s16(row0, 1); - uint8x8_t p1 = vqrshrun_n_s16(row1, 1); - uint8x8_t p2 = vqrshrun_n_s16(row2, 1); - uint8x8_t p3 = vqrshrun_n_s16(row3, 1); - uint8x8_t p4 = vqrshrun_n_s16(row4, 1); - uint8x8_t p5 = vqrshrun_n_s16(row5, 1); - uint8x8_t p6 = vqrshrun_n_s16(row6, 1); - uint8x8_t p7 = vqrshrun_n_s16(row7, 1); - - // again, these can translate into one instruction, but often don't. -#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } -#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } - - // sadly can't use interleaved stores here since we only write - // 8 bytes to each scan line! - - // 8x8 8-bit transpose pass 1 - dct_trn8_8(p0, p1); - dct_trn8_8(p2, p3); - dct_trn8_8(p4, p5); - dct_trn8_8(p6, p7); - - // pass 2 - dct_trn8_16(p0, p2); - dct_trn8_16(p1, p3); - dct_trn8_16(p4, p6); - dct_trn8_16(p5, p7); - - // pass 3 - dct_trn8_32(p0, p4); - dct_trn8_32(p1, p5); - dct_trn8_32(p2, p6); - dct_trn8_32(p3, p7); - - // store - vst1_u8(out, p0); out += out_stride; - vst1_u8(out, p1); out += out_stride; - vst1_u8(out, p2); out += out_stride; - vst1_u8(out, p3); out += out_stride; - vst1_u8(out, p4); out += out_stride; - vst1_u8(out, p5); out += out_stride; - vst1_u8(out, p6); out += out_stride; - vst1_u8(out, p7); - -#undef dct_trn8_8 -#undef dct_trn8_16 -#undef dct_trn8_32 - } - -#undef dct_long_mul -#undef dct_long_mac -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_pass -} - -#endif // STBI_NEON - -#define STBI__MARKER_none 0xff -// if there's a pending marker from the entropy stream, return that -// otherwise, fetch from the stream and get a marker. if there's no -// marker, return 0xff, which is never a valid marker value -static stbi_uc stbi__get_marker(stbi__jpeg *j) -{ - stbi_uc x; - if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } - x = stbi__get8(j->s); - if (x != 0xff) return STBI__MARKER_none; - while (x == 0xff) - x = stbi__get8(j->s); // consume repeated 0xff fill bytes - return x; -} - -// in each scan, we'll have scan_n components, and the order -// of the components is specified by order[] -#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) - -// after a restart interval, stbi__jpeg_reset the entropy decoder and -// the dc prediction -static void stbi__jpeg_reset(stbi__jpeg *j) -{ - j->code_bits = 0; - j->code_buffer = 0; - j->nomore = 0; - j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; - j->marker = STBI__MARKER_none; - j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; - j->eob_run = 0; - // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, - // since we don't even allow 1<<30 pixels -} - -static int stbi__parse_entropy_coded_data(stbi__jpeg *z) -{ - stbi__jpeg_reset(z); - if (!z->progressive) { - if (z->scan_n == 1) { - int i,j; - STBI_SIMD_ALIGN(short, data[64]); - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - // if it's NOT a restart, then just bail, so we get corrupt data - // rather than no data - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } else { // interleaved - int i,j,k,x,y; - STBI_SIMD_ALIGN(short, data[64]); - for (j=0; j < z->img_mcu_y; ++j) { - for (i=0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k=0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y=0; y < z->img_comp[n].v; ++y) { - for (x=0; x < z->img_comp[n].h; ++x) { - int x2 = (i*z->img_comp[n].h + x)*8; - int y2 = (j*z->img_comp[n].v + y)*8; - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data); - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } else { - if (z->scan_n == 1) { - int i,j; - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - if (z->spec_start == 0) { - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } else { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) - return 0; - } - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } else { // interleaved - int i,j,k,x,y; - for (j=0; j < z->img_mcu_y; ++j) { - for (i=0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k=0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y=0; y < z->img_comp[n].v; ++y) { - for (x=0; x < z->img_comp[n].h; ++x) { - int x2 = (i*z->img_comp[n].h + x); - int y2 = (j*z->img_comp[n].v + y); - short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } -} - -static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant) -{ - int i; - for (i=0; i < 64; ++i) - data[i] *= dequant[i]; -} - -static void stbi__jpeg_finish(stbi__jpeg *z) -{ - if (z->progressive) { - // dequantize and idct the data - int i,j,n; - for (n=0; n < z->s->img_n; ++n) { - int w = (z->img_comp[n].x+7) >> 3; - int h = (z->img_comp[n].y+7) >> 3; - for (j=0; j < h; ++j) { - for (i=0; i < w; ++i) { - short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); - z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); - } - } - } - } -} - -static int stbi__process_marker(stbi__jpeg *z, int m) -{ - int L; - switch (m) { - case STBI__MARKER_none: // no marker found - return stbi__err("expected marker","Corrupt JPEG"); - - case 0xDD: // DRI - specify restart interval - if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG"); - z->restart_interval = stbi__get16be(z->s); - return 1; - - case 0xDB: // DQT - define quantization table - L = stbi__get16be(z->s)-2; - while (L > 0) { - int q = stbi__get8(z->s); - int p = q >> 4, sixteen = (p != 0); - int t = q & 15,i; - if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG"); - if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); - - for (i=0; i < 64; ++i) - z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); - L -= (sixteen ? 129 : 65); - } - return L==0; - - case 0xC4: // DHT - define huffman table - L = stbi__get16be(z->s)-2; - while (L > 0) { - stbi_uc *v; - int sizes[16],i,n=0; - int q = stbi__get8(z->s); - int tc = q >> 4; - int th = q & 15; - if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG"); - for (i=0; i < 16; ++i) { - sizes[i] = stbi__get8(z->s); - n += sizes[i]; - } - L -= 17; - if (tc == 0) { - if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0; - v = z->huff_dc[th].values; - } else { - if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0; - v = z->huff_ac[th].values; - } - for (i=0; i < n; ++i) - v[i] = stbi__get8(z->s); - if (tc != 0) - stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); - L -= n; - } - return L==0; - } - - // check for comment block or APP blocks - if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { - L = stbi__get16be(z->s); - if (L < 2) { - if (m == 0xFE) - return stbi__err("bad COM len","Corrupt JPEG"); - else - return stbi__err("bad APP len","Corrupt JPEG"); - } - L -= 2; - - if (m == 0xE0 && L >= 5) { // JFIF APP0 segment - static const unsigned char tag[5] = {'J','F','I','F','\0'}; - int ok = 1; - int i; - for (i=0; i < 5; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 5; - if (ok) - z->jfif = 1; - } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment - static const unsigned char tag[6] = {'A','d','o','b','e','\0'}; - int ok = 1; - int i; - for (i=0; i < 6; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 6; - if (ok) { - stbi__get8(z->s); // version - stbi__get16be(z->s); // flags0 - stbi__get16be(z->s); // flags1 - z->app14_color_transform = stbi__get8(z->s); // color transform - L -= 6; - } - } - - stbi__skip(z->s, L); - return 1; - } - - return stbi__err("unknown marker","Corrupt JPEG"); -} - -// after we see SOS -static int stbi__process_scan_header(stbi__jpeg *z) -{ - int i; - int Ls = stbi__get16be(z->s); - z->scan_n = stbi__get8(z->s); - if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG"); - if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG"); - for (i=0; i < z->scan_n; ++i) { - int id = stbi__get8(z->s), which; - int q = stbi__get8(z->s); - for (which = 0; which < z->s->img_n; ++which) - if (z->img_comp[which].id == id) - break; - if (which == z->s->img_n) return 0; // no match - z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG"); - z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG"); - z->order[i] = which; - } - - { - int aa; - z->spec_start = stbi__get8(z->s); - z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 - aa = stbi__get8(z->s); - z->succ_high = (aa >> 4); - z->succ_low = (aa & 15); - if (z->progressive) { - if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) - return stbi__err("bad SOS", "Corrupt JPEG"); - } else { - if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG"); - if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG"); - z->spec_end = 63; - } - } - - return 1; -} - -static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why) -{ - int i; - for (i=0; i < ncomp; ++i) { - if (z->img_comp[i].raw_data) { - STBI_FREE(z->img_comp[i].raw_data); - z->img_comp[i].raw_data = NULL; - z->img_comp[i].data = NULL; - } - if (z->img_comp[i].raw_coeff) { - STBI_FREE(z->img_comp[i].raw_coeff); - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].coeff = 0; - } - if (z->img_comp[i].linebuf) { - STBI_FREE(z->img_comp[i].linebuf); - z->img_comp[i].linebuf = NULL; - } - } - return why; -} - -static int stbi__process_frame_header(stbi__jpeg *z, int scan) -{ - stbi__context *s = z->s; - int Lf,p,i,q, h_max=1,v_max=1,c; - Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG - p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline - s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG - s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - c = stbi__get8(s); - if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG"); - s->img_n = c; - for (i=0; i < c; ++i) { - z->img_comp[i].data = NULL; - z->img_comp[i].linebuf = NULL; - } - - if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); - - z->rgb = 0; - for (i=0; i < s->img_n; ++i) { - static const unsigned char rgb[3] = { 'R', 'G', 'B' }; - z->img_comp[i].id = stbi__get8(s); - if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) - ++z->rgb; - q = stbi__get8(s); - z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); - z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); - z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG"); - } - - if (scan != STBI__SCAN_load) return 1; - - if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); - - for (i=0; i < s->img_n; ++i) { - if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; - if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; - } - - // compute interleaved mcu info - z->img_h_max = h_max; - z->img_v_max = v_max; - z->img_mcu_w = h_max * 8; - z->img_mcu_h = v_max * 8; - // these sizes can't be more than 17 bits - z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; - z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; - - for (i=0; i < s->img_n; ++i) { - // number of effective pixels (e.g. for non-interleaved MCU) - z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; - z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; - // to simplify generation, we'll allocate enough memory to decode - // the bogus oversized data from using interleaved MCUs and their - // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't - // discard the extra data until colorspace conversion - // - // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) - // so these muls can't overflow with 32-bit ints (which we require) - z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; - z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; - z->img_comp[i].coeff = 0; - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].linebuf = NULL; - z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); - if (z->img_comp[i].raw_data == NULL) - return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); - // align blocks for idct using mmx/sse - z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); - if (z->progressive) { - // w2, h2 are multiples of 8 (see above) - z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; - z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; - z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); - if (z->img_comp[i].raw_coeff == NULL) - return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); - z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); - } - } - - return 1; -} - -// use comparisons since in some cases we handle more than one case (e.g. SOF) -#define stbi__DNL(x) ((x) == 0xdc) -#define stbi__SOI(x) ((x) == 0xd8) -#define stbi__EOI(x) ((x) == 0xd9) -#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) -#define stbi__SOS(x) ((x) == 0xda) - -#define stbi__SOF_progressive(x) ((x) == 0xc2) - -static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) -{ - int m; - z->jfif = 0; - z->app14_color_transform = -1; // valid values are 0,1,2 - z->marker = STBI__MARKER_none; // initialize cached marker to empty - m = stbi__get_marker(z); - if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); - if (scan == STBI__SCAN_type) return 1; - m = stbi__get_marker(z); - while (!stbi__SOF(m)) { - if (!stbi__process_marker(z,m)) return 0; - m = stbi__get_marker(z); - while (m == STBI__MARKER_none) { - // some files have extra padding after their blocks, so ok, we'll scan - if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); - m = stbi__get_marker(z); - } - } - z->progressive = stbi__SOF_progressive(m); - if (!stbi__process_frame_header(z, scan)) return 0; - return 1; -} - -// decode image to YCbCr format -static int stbi__decode_jpeg_image(stbi__jpeg *j) -{ - int m; - for (m = 0; m < 4; m++) { - j->img_comp[m].raw_data = NULL; - j->img_comp[m].raw_coeff = NULL; - } - j->restart_interval = 0; - if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; - m = stbi__get_marker(j); - while (!stbi__EOI(m)) { - if (stbi__SOS(m)) { - if (!stbi__process_scan_header(j)) return 0; - if (!stbi__parse_entropy_coded_data(j)) return 0; - if (j->marker == STBI__MARKER_none ) { - // handle 0s at the end of image data from IP Kamera 9060 - while (!stbi__at_eof(j->s)) { - int x = stbi__get8(j->s); - if (x == 255) { - j->marker = stbi__get8(j->s); - break; - } - } - // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 - } - } else if (stbi__DNL(m)) { - int Ld = stbi__get16be(j->s); - stbi__uint32 NL = stbi__get16be(j->s); - if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); - if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); - } else { - if (!stbi__process_marker(j, m)) return 0; - } - m = stbi__get_marker(j); - } - if (j->progressive) - stbi__jpeg_finish(j); - return 1; -} - -// static jfif-centered resampling (across block boundaries) - -typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1, - int w, int hs); - -#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) - -static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - STBI_NOTUSED(out); - STBI_NOTUSED(in_far); - STBI_NOTUSED(w); - STBI_NOTUSED(hs); - return in_near; -} - -static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate two samples vertically for every one in input - int i; - STBI_NOTUSED(hs); - for (i=0; i < w; ++i) - out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2); - return out; -} - -static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate two samples horizontally for every one in input - int i; - stbi_uc *input = in_near; - - if (w == 1) { - // if only one sample, can't do any interpolation - out[0] = out[1] = input[0]; - return out; - } - - out[0] = input[0]; - out[1] = stbi__div4(input[0]*3 + input[1] + 2); - for (i=1; i < w-1; ++i) { - int n = 3*input[i]+2; - out[i*2+0] = stbi__div4(n+input[i-1]); - out[i*2+1] = stbi__div4(n+input[i+1]); - } - out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2); - out[i*2+1] = input[w-1]; - - STBI_NOTUSED(in_far); - STBI_NOTUSED(hs); - - return out; -} - -#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) - -static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i,t0,t1; - if (w == 1) { - out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3*in_near[0] + in_far[0]; - out[0] = stbi__div4(t1+2); - for (i=1; i < w; ++i) { - t0 = t1; - t1 = 3*in_near[i]+in_far[i]; - out[i*2-1] = stbi__div16(3*t0 + t1 + 8); - out[i*2 ] = stbi__div16(3*t1 + t0 + 8); - } - out[w*2-1] = stbi__div4(t1+2); - - STBI_NOTUSED(hs); - - return out; -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i=0,t0,t1; - - if (w == 1) { - out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3*in_near[0] + in_far[0]; - // process groups of 8 pixels for as long as we can. - // note we can't handle the last pixel in a row in this loop - // because we need to handle the filter boundary conditions. - for (; i < ((w-1) & ~7); i += 8) { -#if defined(STBI_SSE2) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - __m128i zero = _mm_setzero_si128(); - __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i)); - __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i)); - __m128i farw = _mm_unpacklo_epi8(farb, zero); - __m128i nearw = _mm_unpacklo_epi8(nearb, zero); - __m128i diff = _mm_sub_epi16(farw, nearw); - __m128i nears = _mm_slli_epi16(nearw, 2); - __m128i curr = _mm_add_epi16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - __m128i prv0 = _mm_slli_si128(curr, 2); - __m128i nxt0 = _mm_srli_si128(curr, 2); - __m128i prev = _mm_insert_epi16(prv0, t1, 0); - __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - __m128i bias = _mm_set1_epi16(8); - __m128i curs = _mm_slli_epi16(curr, 2); - __m128i prvd = _mm_sub_epi16(prev, curr); - __m128i nxtd = _mm_sub_epi16(next, curr); - __m128i curb = _mm_add_epi16(curs, bias); - __m128i even = _mm_add_epi16(prvd, curb); - __m128i odd = _mm_add_epi16(nxtd, curb); - - // interleave even and odd pixels, then undo scaling. - __m128i int0 = _mm_unpacklo_epi16(even, odd); - __m128i int1 = _mm_unpackhi_epi16(even, odd); - __m128i de0 = _mm_srli_epi16(int0, 4); - __m128i de1 = _mm_srli_epi16(int1, 4); - - // pack and write output - __m128i outv = _mm_packus_epi16(de0, de1); - _mm_storeu_si128((__m128i *) (out + i*2), outv); -#elif defined(STBI_NEON) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - uint8x8_t farb = vld1_u8(in_far + i); - uint8x8_t nearb = vld1_u8(in_near + i); - int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); - int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); - int16x8_t curr = vaddq_s16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - int16x8_t prv0 = vextq_s16(curr, curr, 7); - int16x8_t nxt0 = vextq_s16(curr, curr, 1); - int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); - int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - int16x8_t curs = vshlq_n_s16(curr, 2); - int16x8_t prvd = vsubq_s16(prev, curr); - int16x8_t nxtd = vsubq_s16(next, curr); - int16x8_t even = vaddq_s16(curs, prvd); - int16x8_t odd = vaddq_s16(curs, nxtd); - - // undo scaling and round, then store with even/odd phases interleaved - uint8x8x2_t o; - o.val[0] = vqrshrun_n_s16(even, 4); - o.val[1] = vqrshrun_n_s16(odd, 4); - vst2_u8(out + i*2, o); -#endif - - // "previous" value for next iter - t1 = 3*in_near[i+7] + in_far[i+7]; - } - - t0 = t1; - t1 = 3*in_near[i] + in_far[i]; - out[i*2] = stbi__div16(3*t1 + t0 + 8); - - for (++i; i < w; ++i) { - t0 = t1; - t1 = 3*in_near[i]+in_far[i]; - out[i*2-1] = stbi__div16(3*t0 + t1 + 8); - out[i*2 ] = stbi__div16(3*t1 + t0 + 8); - } - out[w*2-1] = stbi__div4(t1+2); - - STBI_NOTUSED(hs); - - return out; -} -#endif - -static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) -{ - // resample with nearest-neighbor - int i,j; - STBI_NOTUSED(in_far); - for (i=0; i < w; ++i) - for (j=0; j < hs; ++j) - out[i*hs+j] = in_near[i]; - return out; -} - -// this is a reduced-precision calculation of YCbCr-to-RGB introduced -// to make sure the code produces the same results in both SIMD and scalar -#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) -static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) -{ - int i; - for (i=0; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1<<19); // rounding - int r,g,b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr* stbi__float2fixed(1.40200f); - g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb* stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) -{ - int i = 0; - -#ifdef STBI_SSE2 - // step == 3 is pretty ugly on the final interleave, and i'm not convinced - // it's useful in practice (you wouldn't use it for textures, for example). - // so just accelerate step == 4 case. - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - __m128i signflip = _mm_set1_epi8(-0x80); - __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f)); - __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f)); - __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f)); - __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f)); - __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128); - __m128i xw = _mm_set1_epi16(255); // alpha channel - - for (; i+7 < count; i += 8) { - // load - __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i)); - __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i)); - __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i)); - __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 - __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 - - // unpack to short (and left-shift cr, cb by 8) - __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); - __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); - __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); - - // color transform - __m128i yws = _mm_srli_epi16(yw, 4); - __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); - __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); - __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); - __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); - __m128i rws = _mm_add_epi16(cr0, yws); - __m128i gwt = _mm_add_epi16(cb0, yws); - __m128i bws = _mm_add_epi16(yws, cb1); - __m128i gws = _mm_add_epi16(gwt, cr1); - - // descale - __m128i rw = _mm_srai_epi16(rws, 4); - __m128i bw = _mm_srai_epi16(bws, 4); - __m128i gw = _mm_srai_epi16(gws, 4); - - // back to byte, set up for transpose - __m128i brb = _mm_packus_epi16(rw, bw); - __m128i gxb = _mm_packus_epi16(gw, xw); - - // transpose to interleave channels - __m128i t0 = _mm_unpacklo_epi8(brb, gxb); - __m128i t1 = _mm_unpackhi_epi8(brb, gxb); - __m128i o0 = _mm_unpacklo_epi16(t0, t1); - __m128i o1 = _mm_unpackhi_epi16(t0, t1); - - // store - _mm_storeu_si128((__m128i *) (out + 0), o0); - _mm_storeu_si128((__m128i *) (out + 16), o1); - out += 32; - } - } -#endif - -#ifdef STBI_NEON - // in this version, step=3 support would be easy to add. but is there demand? - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - uint8x8_t signflip = vdup_n_u8(0x80); - int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f)); - int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f)); - int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f)); - int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f)); - - for (; i+7 < count; i += 8) { - // load - uint8x8_t y_bytes = vld1_u8(y + i); - uint8x8_t cr_bytes = vld1_u8(pcr + i); - uint8x8_t cb_bytes = vld1_u8(pcb + i); - int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); - int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); - - // expand to s16 - int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); - int16x8_t crw = vshll_n_s8(cr_biased, 7); - int16x8_t cbw = vshll_n_s8(cb_biased, 7); - - // color transform - int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); - int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); - int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); - int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); - int16x8_t rws = vaddq_s16(yws, cr0); - int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); - int16x8_t bws = vaddq_s16(yws, cb1); - - // undo scaling, round, convert to byte - uint8x8x4_t o; - o.val[0] = vqrshrun_n_s16(rws, 4); - o.val[1] = vqrshrun_n_s16(gws, 4); - o.val[2] = vqrshrun_n_s16(bws, 4); - o.val[3] = vdup_n_u8(255); - - // store, interleaving r/g/b/a - vst4_u8(out, o); - out += 8*4; - } - } -#endif - - for (; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1<<19); // rounding - int r,g,b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr* stbi__float2fixed(1.40200f); - g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb* stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} -#endif - -// set up the kernels -static void stbi__setup_jpeg(stbi__jpeg *j) -{ - j->idct_block_kernel = stbi__idct_block; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; - -#ifdef STBI_SSE2 - if (stbi__sse2_available()) { - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; - } -#endif - -#ifdef STBI_NEON - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; -#endif -} - -// clean up the temporary component buffers -static void stbi__cleanup_jpeg(stbi__jpeg *j) -{ - stbi__free_jpeg_components(j, j->s->img_n, 0); -} - -typedef struct -{ - resample_row_func resample; - stbi_uc *line0,*line1; - int hs,vs; // expansion factor in each axis - int w_lores; // horizontal pixels pre-expansion - int ystep; // how far through vertical expansion we are - int ypos; // which pre-expansion row we're on -} stbi__resample; - -// fast 0..255 * 0..255 => 0..255 rounded multiplication -static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) -{ - unsigned int t = x*y + 128; - return (stbi_uc) ((t + (t >>8)) >> 8); -} - -static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) -{ - int n, decode_n, is_rgb; - z->s->img_n = 0; // make stbi__cleanup_jpeg safe - - // validate req_comp - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - - // load a jpeg image from whichever source, but leave in YCbCr format - if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } - - // determine actual number of components to generate - n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; - - is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); - - if (z->s->img_n == 3 && n < 3 && !is_rgb) - decode_n = 1; - else - decode_n = z->s->img_n; - - // resample and color-convert - { - int k; - unsigned int i,j; - stbi_uc *output; - stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL }; - - stbi__resample res_comp[4]; - - for (k=0; k < decode_n; ++k) { - stbi__resample *r = &res_comp[k]; - - // allocate line buffer big enough for upsampling off the edges - // with upsample factor of 4 - z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3); - if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - r->hs = z->img_h_max / z->img_comp[k].h; - r->vs = z->img_v_max / z->img_comp[k].v; - r->ystep = r->vs >> 1; - r->w_lores = (z->s->img_x + r->hs-1) / r->hs; - r->ypos = 0; - r->line0 = r->line1 = z->img_comp[k].data; - - if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; - else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; - else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; - else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; - else r->resample = stbi__resample_row_generic; - } - - // can't error after this so, this is safe - output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); - if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - // now go ahead and resample - for (j=0; j < z->s->img_y; ++j) { - stbi_uc *out = output + n * z->s->img_x * j; - for (k=0; k < decode_n; ++k) { - stbi__resample *r = &res_comp[k]; - int y_bot = r->ystep >= (r->vs >> 1); - coutput[k] = r->resample(z->img_comp[k].linebuf, - y_bot ? r->line1 : r->line0, - y_bot ? r->line0 : r->line1, - r->w_lores, r->hs); - if (++r->ystep >= r->vs) { - r->ystep = 0; - r->line0 = r->line1; - if (++r->ypos < z->img_comp[k].y) - r->line1 += z->img_comp[k].w2; - } - } - if (n >= 3) { - stbi_uc *y = coutput[0]; - if (z->s->img_n == 3) { - if (is_rgb) { - for (i=0; i < z->s->img_x; ++i) { - out[0] = y[i]; - out[1] = coutput[1][i]; - out[2] = coutput[2][i]; - out[3] = 255; - out += n; - } - } else { - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } else if (z->s->img_n == 4) { - if (z->app14_color_transform == 0) { // CMYK - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(coutput[0][i], m); - out[1] = stbi__blinn_8x8(coutput[1][i], m); - out[2] = stbi__blinn_8x8(coutput[2][i], m); - out[3] = 255; - out += n; - } - } else if (z->app14_color_transform == 2) { // YCCK - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(255 - out[0], m); - out[1] = stbi__blinn_8x8(255 - out[1], m); - out[2] = stbi__blinn_8x8(255 - out[2], m); - out += n; - } - } else { // YCbCr + alpha? Ignore the fourth channel for now - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } else - for (i=0; i < z->s->img_x; ++i) { - out[0] = out[1] = out[2] = y[i]; - out[3] = 255; // not used if n==3 - out += n; - } - } else { - if (is_rgb) { - if (n == 1) - for (i=0; i < z->s->img_x; ++i) - *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - else { - for (i=0; i < z->s->img_x; ++i, out += 2) { - out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - out[1] = 255; - } - } - } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { - for (i=0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); - stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); - stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); - out[0] = stbi__compute_y(r, g, b); - out[1] = 255; - out += n; - } - } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { - for (i=0; i < z->s->img_x; ++i) { - out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); - out[1] = 255; - out += n; - } - } else { - stbi_uc *y = coutput[0]; - if (n == 1) - for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; - else - for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; } - } - } - } - stbi__cleanup_jpeg(z); - *out_x = z->s->img_x; - *out_y = z->s->img_y; - if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output - return output; - } -} - -static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - unsigned char* result; - stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); - STBI_NOTUSED(ri); - j->s = s; - stbi__setup_jpeg(j); - result = load_jpeg_image(j, x,y,comp,req_comp); - STBI_FREE(j); - return result; -} - -static int stbi__jpeg_test(stbi__context *s) -{ - int r; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - j->s = s; - stbi__setup_jpeg(j); - r = stbi__decode_jpeg_header(j, STBI__SCAN_type); - stbi__rewind(s); - STBI_FREE(j); - return r; -} - -static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) -{ - if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { - stbi__rewind( j->s ); - return 0; - } - if (x) *x = j->s->img_x; - if (y) *y = j->s->img_y; - if (comp) *comp = j->s->img_n >= 3 ? 3 : 1; - return 1; -} - -static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) -{ - int result; - stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); - j->s = s; - result = stbi__jpeg_info_raw(j, x, y, comp); - STBI_FREE(j); - return result; -} -#endif - -// public domain zlib decode v0.2 Sean Barrett 2006-11-18 -// simple implementation -// - all input must be provided in an upfront buffer -// - all output is written to a single output buffer (can malloc/realloc) -// performance -// - fast huffman - -#ifndef STBI_NO_ZLIB - -// fast-way is faster to check than jpeg huffman, but slow way is slower -#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables -#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) - -// zlib-style huffman encoding -// (jpegs packs from left, zlib from right, so can't share code) -typedef struct -{ - stbi__uint16 fast[1 << STBI__ZFAST_BITS]; - stbi__uint16 firstcode[16]; - int maxcode[17]; - stbi__uint16 firstsymbol[16]; - stbi_uc size[288]; - stbi__uint16 value[288]; -} stbi__zhuffman; - -stbi_inline static int stbi__bitreverse16(int n) -{ - n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); - n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); - n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); - n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); - return n; -} - -stbi_inline static int stbi__bit_reverse(int v, int bits) -{ - STBI_ASSERT(bits <= 16); - // to bit reverse n bits, reverse 16 and shift - // e.g. 11 bits, bit reverse and shift away 5 - return stbi__bitreverse16(v) >> (16-bits); -} - -static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num) -{ - int i,k=0; - int code, next_code[16], sizes[17]; - - // DEFLATE spec for generating codes - memset(sizes, 0, sizeof(sizes)); - memset(z->fast, 0, sizeof(z->fast)); - for (i=0; i < num; ++i) - ++sizes[sizelist[i]]; - sizes[0] = 0; - for (i=1; i < 16; ++i) - if (sizes[i] > (1 << i)) - return stbi__err("bad sizes", "Corrupt PNG"); - code = 0; - for (i=1; i < 16; ++i) { - next_code[i] = code; - z->firstcode[i] = (stbi__uint16) code; - z->firstsymbol[i] = (stbi__uint16) k; - code = (code + sizes[i]); - if (sizes[i]) - if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG"); - z->maxcode[i] = code << (16-i); // preshift for inner loop - code <<= 1; - k += sizes[i]; - } - z->maxcode[16] = 0x10000; // sentinel - for (i=0; i < num; ++i) { - int s = sizelist[i]; - if (s) { - int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; - stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i); - z->size [c] = (stbi_uc ) s; - z->value[c] = (stbi__uint16) i; - if (s <= STBI__ZFAST_BITS) { - int j = stbi__bit_reverse(next_code[s],s); - while (j < (1 << STBI__ZFAST_BITS)) { - z->fast[j] = fastv; - j += (1 << s); - } - } - ++next_code[s]; - } - } - return 1; -} - -// zlib-from-memory implementation for PNG reading -// because PNG allows splitting the zlib stream arbitrarily, -// and it's annoying structurally to have PNG call ZLIB call PNG, -// we require PNG read all the IDATs and combine them into a single -// memory buffer - -typedef struct -{ - stbi_uc *zbuffer, *zbuffer_end; - int num_bits; - stbi__uint32 code_buffer; - - char *zout; - char *zout_start; - char *zout_end; - int z_expandable; - - stbi__zhuffman z_length, z_distance; -} stbi__zbuf; - -stbi_inline static int stbi__zeof(stbi__zbuf *z) -{ - return (z->zbuffer >= z->zbuffer_end); -} - -stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z) -{ - return stbi__zeof(z) ? 0 : *z->zbuffer++; -} - -static void stbi__fill_bits(stbi__zbuf *z) -{ - do { - if (z->code_buffer >= (1U << z->num_bits)) { - z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */ - return; - } - z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; - z->num_bits += 8; - } while (z->num_bits <= 24); -} - -stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n) -{ - unsigned int k; - if (z->num_bits < n) stbi__fill_bits(z); - k = z->code_buffer & ((1 << n) - 1); - z->code_buffer >>= n; - z->num_bits -= n; - return k; -} - -static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z) -{ - int b,s,k; - // not resolved by fast table, so compute it the slow way - // use jpeg approach, which requires MSbits at top - k = stbi__bit_reverse(a->code_buffer, 16); - for (s=STBI__ZFAST_BITS+1; ; ++s) - if (k < z->maxcode[s]) - break; - if (s >= 16) return -1; // invalid code! - // code size is s, so: - b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; - if (b >= sizeof (z->size)) return -1; // some data was corrupt somewhere! - if (z->size[b] != s) return -1; // was originally an assert, but report failure instead. - a->code_buffer >>= s; - a->num_bits -= s; - return z->value[b]; -} - -stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) -{ - int b,s; - if (a->num_bits < 16) { - if (stbi__zeof(a)) { - return -1; /* report error for unexpected end of data. */ - } - stbi__fill_bits(a); - } - b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; - if (b) { - s = b >> 9; - a->code_buffer >>= s; - a->num_bits -= s; - return b & 511; - } - return stbi__zhuffman_decode_slowpath(a, z); -} - -static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes -{ - char *q; - unsigned int cur, limit, old_limit; - z->zout = zout; - if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); - cur = (unsigned int) (z->zout - z->zout_start); - limit = old_limit = (unsigned) (z->zout_end - z->zout_start); - if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory"); - while (cur + n > limit) { - if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory"); - limit *= 2; - } - q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); - STBI_NOTUSED(old_limit); - if (q == NULL) return stbi__err("outofmem", "Out of memory"); - z->zout_start = q; - z->zout = q + cur; - z->zout_end = q + limit; - return 1; -} - -static const int stbi__zlength_base[31] = { - 3,4,5,6,7,8,9,10,11,13, - 15,17,19,23,27,31,35,43,51,59, - 67,83,99,115,131,163,195,227,258,0,0 }; - -static const int stbi__zlength_extra[31]= -{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; - -static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, -257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; - -static const int stbi__zdist_extra[32] = -{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; - -static int stbi__parse_huffman_block(stbi__zbuf *a) -{ - char *zout = a->zout; - for(;;) { - int z = stbi__zhuffman_decode(a, &a->z_length); - if (z < 256) { - if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes - if (zout >= a->zout_end) { - if (!stbi__zexpand(a, zout, 1)) return 0; - zout = a->zout; - } - *zout++ = (char) z; - } else { - stbi_uc *p; - int len,dist; - if (z == 256) { - a->zout = zout; - return 1; - } - z -= 257; - len = stbi__zlength_base[z]; - if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); - z = stbi__zhuffman_decode(a, &a->z_distance); - if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); - dist = stbi__zdist_base[z]; - if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); - if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG"); - if (zout + len > a->zout_end) { - if (!stbi__zexpand(a, zout, len)) return 0; - zout = a->zout; - } - p = (stbi_uc *) (zout - dist); - if (dist == 1) { // run of one byte; common in images. - stbi_uc v = *p; - if (len) { do *zout++ = v; while (--len); } - } else { - if (len) { do *zout++ = *p++; while (--len); } - } - } - } -} - -static int stbi__compute_huffman_codes(stbi__zbuf *a) -{ - static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; - stbi__zhuffman z_codelength; - stbi_uc lencodes[286+32+137];//padding for maximum single op - stbi_uc codelength_sizes[19]; - int i,n; - - int hlit = stbi__zreceive(a,5) + 257; - int hdist = stbi__zreceive(a,5) + 1; - int hclen = stbi__zreceive(a,4) + 4; - int ntot = hlit + hdist; - - memset(codelength_sizes, 0, sizeof(codelength_sizes)); - for (i=0; i < hclen; ++i) { - int s = stbi__zreceive(a,3); - codelength_sizes[length_dezigzag[i]] = (stbi_uc) s; - } - if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; - - n = 0; - while (n < ntot) { - int c = stbi__zhuffman_decode(a, &z_codelength); - if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); - if (c < 16) - lencodes[n++] = (stbi_uc) c; - else { - stbi_uc fill = 0; - if (c == 16) { - c = stbi__zreceive(a,2)+3; - if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); - fill = lencodes[n-1]; - } else if (c == 17) { - c = stbi__zreceive(a,3)+3; - } else if (c == 18) { - c = stbi__zreceive(a,7)+11; - } else { - return stbi__err("bad codelengths", "Corrupt PNG"); - } - if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); - memset(lencodes+n, fill, c); - n += c; - } - } - if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG"); - if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; - return 1; -} - -static int stbi__parse_uncompressed_block(stbi__zbuf *a) -{ - stbi_uc header[4]; - int len,nlen,k; - if (a->num_bits & 7) - stbi__zreceive(a, a->num_bits & 7); // discard - // drain the bit-packed data into header - k = 0; - while (a->num_bits > 0) { - header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check - a->code_buffer >>= 8; - a->num_bits -= 8; - } - if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG"); - // now fill header the normal way - while (k < 4) - header[k++] = stbi__zget8(a); - len = header[1] * 256 + header[0]; - nlen = header[3] * 256 + header[2]; - if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG"); - if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG"); - if (a->zout + len > a->zout_end) - if (!stbi__zexpand(a, a->zout, len)) return 0; - memcpy(a->zout, a->zbuffer, len); - a->zbuffer += len; - a->zout += len; - return 1; -} - -static int stbi__parse_zlib_header(stbi__zbuf *a) -{ - int cmf = stbi__zget8(a); - int cm = cmf & 15; - /* int cinfo = cmf >> 4; */ - int flg = stbi__zget8(a); - if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec - if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec - if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png - if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png - // window = 1 << (8 + cinfo)... but who cares, we fully buffer output - return 1; -} - -static const stbi_uc stbi__zdefault_length[288] = -{ - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 -}; -static const stbi_uc stbi__zdefault_distance[32] = -{ - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 -}; -/* -Init algorithm: -{ - int i; // use <= to match clearly with spec - for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; - for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; - for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; - for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; - - for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; -} -*/ - -static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) -{ - int final, type; - if (parse_header) - if (!stbi__parse_zlib_header(a)) return 0; - a->num_bits = 0; - a->code_buffer = 0; - do { - final = stbi__zreceive(a,1); - type = stbi__zreceive(a,2); - if (type == 0) { - if (!stbi__parse_uncompressed_block(a)) return 0; - } else if (type == 3) { - return 0; - } else { - if (type == 1) { - // use fixed code lengths - if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; - } else { - if (!stbi__compute_huffman_codes(a)) return 0; - } - if (!stbi__parse_huffman_block(a)) return 0; - } - } while (!final); - return 1; -} - -static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header) -{ - a->zout_start = obuf; - a->zout = obuf; - a->zout_end = obuf + olen; - a->z_expandable = exp; - - return stbi__parse_zlib(a, parse_header); -} - -STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) -{ - return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); -} - -STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc *) ibuffer; - a.zbuffer_end = (stbi_uc *) ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) - return (int) (a.zout - a.zout_start); - else - return -1; -} - -STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) -{ - stbi__zbuf a; - char *p = (char *) stbi__malloc(16384); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc *) buffer; - a.zbuffer_end = (stbi_uc *) buffer+len; - if (stbi__do_zlib(&a, p, 16384, 1, 0)) { - if (outlen) *outlen = (int) (a.zout - a.zout_start); - return a.zout_start; - } else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc *) ibuffer; - a.zbuffer_end = (stbi_uc *) ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) - return (int) (a.zout - a.zout_start); - else - return -1; -} -#endif - -// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 -// simple implementation -// - only 8-bit samples -// - no CRC checking -// - allocates lots of intermediate memory -// - avoids problem of streaming data between subsystems -// - avoids explicit window management -// performance -// - uses stb_zlib, a PD zlib implementation with fast huffman decoding - -#ifndef STBI_NO_PNG -typedef struct -{ - stbi__uint32 length; - stbi__uint32 type; -} stbi__pngchunk; - -static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) -{ - stbi__pngchunk c; - c.length = stbi__get32be(s); - c.type = stbi__get32be(s); - return c; -} - -static int stbi__check_png_header(stbi__context *s) -{ - static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; - int i; - for (i=0; i < 8; ++i) - if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); - return 1; -} - -typedef struct -{ - stbi__context *s; - stbi_uc *idata, *expanded, *out; - int depth; -} stbi__png; - - -enum { - STBI__F_none=0, - STBI__F_sub=1, - STBI__F_up=2, - STBI__F_avg=3, - STBI__F_paeth=4, - // synthetic filters used for first scanline to avoid needing a dummy row of 0s - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static stbi_uc first_row_filter[5] = -{ - STBI__F_none, - STBI__F_sub, - STBI__F_none, - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static int stbi__paeth(int a, int b, int c) -{ - int p = a + b - c; - int pa = abs(p-a); - int pb = abs(p-b); - int pc = abs(p-c); - if (pa <= pb && pa <= pc) return a; - if (pb <= pc) return b; - return c; -} - -static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; - -// create the png data from post-deflated data -static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) -{ - int bytes = (depth == 16? 2 : 1); - stbi__context *s = a->s; - stbi__uint32 i,j,stride = x*out_n*bytes; - stbi__uint32 img_len, img_width_bytes; - int k; - int img_n = s->img_n; // copy it into a local for later - - int output_bytes = out_n*bytes; - int filter_bytes = img_n*bytes; - int width = x; - - STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); - a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into - if (!a->out) return stbi__err("outofmem", "Out of memory"); - - if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); - img_width_bytes = (((img_n * x * depth) + 7) >> 3); - img_len = (img_width_bytes + 1) * y; - - // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, - // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), - // so just check for raw_len < img_len always. - if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); - - for (j=0; j < y; ++j) { - stbi_uc *cur = a->out + stride*j; - stbi_uc *prior; - int filter = *raw++; - - if (filter > 4) - return stbi__err("invalid filter","Corrupt PNG"); - - if (depth < 8) { - if (img_width_bytes > x) return stbi__err("invalid width","Corrupt PNG"); - cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place - filter_bytes = 1; - width = img_width_bytes; - } - prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above - - // if first row, use special filter that doesn't sample previous row - if (j == 0) filter = first_row_filter[filter]; - - // handle first byte explicitly - for (k=0; k < filter_bytes; ++k) { - switch (filter) { - case STBI__F_none : cur[k] = raw[k]; break; - case STBI__F_sub : cur[k] = raw[k]; break; - case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; - case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break; - case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break; - case STBI__F_avg_first : cur[k] = raw[k]; break; - case STBI__F_paeth_first: cur[k] = raw[k]; break; - } - } - - if (depth == 8) { - if (img_n != out_n) - cur[img_n] = 255; // first pixel - raw += img_n; - cur += out_n; - prior += out_n; - } else if (depth == 16) { - if (img_n != out_n) { - cur[filter_bytes] = 255; // first pixel top byte - cur[filter_bytes+1] = 255; // first pixel bottom byte - } - raw += filter_bytes; - cur += output_bytes; - prior += output_bytes; - } else { - raw += 1; - cur += 1; - prior += 1; - } - - // this is a little gross, so that we don't switch per-pixel or per-component - if (depth < 8 || img_n == out_n) { - int nk = (width - 1)*filter_bytes; - #define STBI__CASE(f) \ - case f: \ - for (k=0; k < nk; ++k) - switch (filter) { - // "none" filter turns into a memcpy here; make that explicit. - case STBI__F_none: memcpy(cur, raw, nk); break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break; - } - #undef STBI__CASE - raw += nk; - } else { - STBI_ASSERT(img_n+1 == out_n); - #define STBI__CASE(f) \ - case f: \ - for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ - for (k=0; k < filter_bytes; ++k) - switch (filter) { - STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break; - } - #undef STBI__CASE - - // the loop above sets the high byte of the pixels' alpha, but for - // 16 bit png files we also need the low byte set. we'll do that here. - if (depth == 16) { - cur = a->out + stride*j; // start at the beginning of the row again - for (i=0; i < x; ++i,cur+=output_bytes) { - cur[filter_bytes+1] = 255; - } - } - } - } - - // we make a separate pass to expand bits to pixels; for performance, - // this could run two scanlines behind the above code, so it won't - // intefere with filtering but will still be in the cache. - if (depth < 8) { - for (j=0; j < y; ++j) { - stbi_uc *cur = a->out + stride*j; - stbi_uc *in = a->out + stride*j + x*out_n - img_width_bytes; - // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit - // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop - stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range - - // note that the final byte might overshoot and write more data than desired. - // we can allocate enough data that this never writes out of memory, but it - // could also overwrite the next scanline. can it overwrite non-empty data - // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. - // so we need to explicitly clamp the final ones - - if (depth == 4) { - for (k=x*img_n; k >= 2; k-=2, ++in) { - *cur++ = scale * ((*in >> 4) ); - *cur++ = scale * ((*in ) & 0x0f); - } - if (k > 0) *cur++ = scale * ((*in >> 4) ); - } else if (depth == 2) { - for (k=x*img_n; k >= 4; k-=4, ++in) { - *cur++ = scale * ((*in >> 6) ); - *cur++ = scale * ((*in >> 4) & 0x03); - *cur++ = scale * ((*in >> 2) & 0x03); - *cur++ = scale * ((*in ) & 0x03); - } - if (k > 0) *cur++ = scale * ((*in >> 6) ); - if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03); - if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03); - } else if (depth == 1) { - for (k=x*img_n; k >= 8; k-=8, ++in) { - *cur++ = scale * ((*in >> 7) ); - *cur++ = scale * ((*in >> 6) & 0x01); - *cur++ = scale * ((*in >> 5) & 0x01); - *cur++ = scale * ((*in >> 4) & 0x01); - *cur++ = scale * ((*in >> 3) & 0x01); - *cur++ = scale * ((*in >> 2) & 0x01); - *cur++ = scale * ((*in >> 1) & 0x01); - *cur++ = scale * ((*in ) & 0x01); - } - if (k > 0) *cur++ = scale * ((*in >> 7) ); - if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01); - if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01); - if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01); - if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01); - if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01); - if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01); - } - if (img_n != out_n) { - int q; - // insert alpha = 255 - cur = a->out + stride*j; - if (img_n == 1) { - for (q=x-1; q >= 0; --q) { - cur[q*2+1] = 255; - cur[q*2+0] = cur[q]; - } - } else { - STBI_ASSERT(img_n == 3); - for (q=x-1; q >= 0; --q) { - cur[q*4+3] = 255; - cur[q*4+2] = cur[q*3+2]; - cur[q*4+1] = cur[q*3+1]; - cur[q*4+0] = cur[q*3+0]; - } - } - } - } - } else if (depth == 16) { - // force the image data from big-endian to platform-native. - // this is done in a separate pass due to the decoding relying - // on the data being untouched, but could probably be done - // per-line during decode if care is taken. - stbi_uc *cur = a->out; - stbi__uint16 *cur16 = (stbi__uint16*)cur; - - for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) { - *cur16 = (cur[0] << 8) | cur[1]; - } - } - - return 1; -} - -static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) -{ - int bytes = (depth == 16 ? 2 : 1); - int out_bytes = out_n * bytes; - stbi_uc *final; - int p; - if (!interlaced) - return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); - - // de-interlacing - final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); - for (p=0; p < 7; ++p) { - int xorig[] = { 0,4,0,2,0,1,0 }; - int yorig[] = { 0,0,4,0,2,0,1 }; - int xspc[] = { 8,8,4,4,2,2,1 }; - int yspc[] = { 8,8,8,4,4,2,2 }; - int i,j,x,y; - // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 - x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p]; - y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p]; - if (x && y) { - stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; - if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { - STBI_FREE(final); - return 0; - } - for (j=0; j < y; ++j) { - for (i=0; i < x; ++i) { - int out_y = j*yspc[p]+yorig[p]; - int out_x = i*xspc[p]+xorig[p]; - memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes, - a->out + (j*x+i)*out_bytes, out_bytes); - } - } - STBI_FREE(a->out); - image_data += img_len; - image_data_len -= img_len; - } - } - a->out = final; - - return 1; -} - -static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc *p = z->out; - - // compute color-based transparency, assuming we've - // already got 255 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i=0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 255); - p += 2; - } - } else { - for (i=0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi__uint16 *p = (stbi__uint16*) z->out; - - // compute color-based transparency, assuming we've - // already got 65535 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 65535); - p += 2; - } - } else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) -{ - stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; - stbi_uc *p, *temp_out, *orig = a->out; - - p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0); - if (p == NULL) return stbi__err("outofmem", "Out of memory"); - - // between here and free(out) below, exitting would leak - temp_out = p; - - if (pal_img_n == 3) { - for (i=0; i < pixel_count; ++i) { - int n = orig[i]*4; - p[0] = palette[n ]; - p[1] = palette[n+1]; - p[2] = palette[n+2]; - p += 3; - } - } else { - for (i=0; i < pixel_count; ++i) { - int n = orig[i]*4; - p[0] = palette[n ]; - p[1] = palette[n+1]; - p[2] = palette[n+2]; - p[3] = palette[n+3]; - p += 4; - } - } - STBI_FREE(a->out); - a->out = temp_out; - - STBI_NOTUSED(len); - - return 1; -} - -static int stbi__unpremultiply_on_load = 0; -static int stbi__de_iphone_flag = 0; - -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag = flag_true_if_should_convert; -} - -static void stbi__de_iphone(stbi__png *z) -{ - stbi__context *s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc *p = z->out; - - if (s->img_out_n == 3) { // convert bgr to rgb - for (i=0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 3; - } - } else { - STBI_ASSERT(s->img_out_n == 4); - if (stbi__unpremultiply_on_load) { - // convert bgr to rgb and unpremultiply - for (i=0; i < pixel_count; ++i) { - stbi_uc a = p[3]; - stbi_uc t = p[0]; - if (a) { - stbi_uc half = a / 2; - p[0] = (p[2] * 255 + half) / a; - p[1] = (p[1] * 255 + half) / a; - p[2] = ( t * 255 + half) / a; - } else { - p[0] = p[2]; - p[2] = t; - } - p += 4; - } - } else { - // convert bgr to rgb - for (i=0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 4; - } - } - } -} - -#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) - -static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) -{ - stbi_uc palette[1024], pal_img_n=0; - stbi_uc has_trans=0, tc[3]={0}; - stbi__uint16 tc16[3]; - stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; - int first=1,k,interlace=0, color=0, is_iphone=0; - stbi__context *s = z->s; - - z->expanded = NULL; - z->idata = NULL; - z->out = NULL; - - if (!stbi__check_png_header(s)) return 0; - - if (scan == STBI__SCAN_type) return 1; - - for (;;) { - stbi__pngchunk c = stbi__get_chunk_header(s); - switch (c.type) { - case STBI__PNG_TYPE('C','g','B','I'): - is_iphone = 1; - stbi__skip(s, c.length); - break; - case STBI__PNG_TYPE('I','H','D','R'): { - int comp,filter; - if (!first) return stbi__err("multiple IHDR","Corrupt PNG"); - first = 0; - if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); - s->img_x = stbi__get32be(s); - s->img_y = stbi__get32be(s); - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only"); - color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); - if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG"); - if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); - comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); - filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); - interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG"); - if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG"); - if (!pal_img_n) { - s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); - if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); - if (scan == STBI__SCAN_header) return 1; - } else { - // if paletted, then pal_n is our final components, and - // img_n is # components to decompress/filter. - s->img_n = 1; - if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG"); - // if SCAN_header, have to scan to see if we have a tRNS - } - break; - } - - case STBI__PNG_TYPE('P','L','T','E'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG"); - pal_len = c.length / 3; - if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG"); - for (i=0; i < pal_len; ++i) { - palette[i*4+0] = stbi__get8(s); - palette[i*4+1] = stbi__get8(s); - palette[i*4+2] = stbi__get8(s); - palette[i*4+3] = 255; - } - break; - } - - case STBI__PNG_TYPE('t','R','N','S'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG"); - if (pal_img_n) { - if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } - if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG"); - if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG"); - pal_img_n = 4; - for (i=0; i < c.length; ++i) - palette[i*4+3] = stbi__get8(s); - } else { - if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); - if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); - has_trans = 1; - if (z->depth == 16) { - for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is - } else { - for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger - } - } - break; - } - - case STBI__PNG_TYPE('I','D','A','T'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG"); - if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } - if ((int)(ioff + c.length) < (int)ioff) return 0; - if (ioff + c.length > idata_limit) { - stbi__uint32 idata_limit_old = idata_limit; - stbi_uc *p; - if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; - while (ioff + c.length > idata_limit) - idata_limit *= 2; - STBI_NOTUSED(idata_limit_old); - p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); - z->idata = p; - } - if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); - ioff += c.length; - break; - } - - case STBI__PNG_TYPE('I','E','N','D'): { - stbi__uint32 raw_len, bpl; - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (scan != STBI__SCAN_load) return 1; - if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); - // initial guess for decoded data size to avoid unnecessary reallocs - bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component - raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; - z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); - if (z->expanded == NULL) return 0; // zlib should set error - STBI_FREE(z->idata); z->idata = NULL; - if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) - s->img_out_n = s->img_n+1; - else - s->img_out_n = s->img_n; - if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; - if (has_trans) { - if (z->depth == 16) { - if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; - } else { - if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; - } - } - if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) - stbi__de_iphone(z); - if (pal_img_n) { - // pal_img_n == 3 or 4 - s->img_n = pal_img_n; // record the actual colors we had - s->img_out_n = pal_img_n; - if (req_comp >= 3) s->img_out_n = req_comp; - if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) - return 0; - } else if (has_trans) { - // non-paletted image with tRNS -> source image has (constant) alpha - ++s->img_n; - } - STBI_FREE(z->expanded); z->expanded = NULL; - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - return 1; - } - - default: - // if critical, fail - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if ((c.type & (1 << 29)) == 0) { - #ifndef STBI_NO_FAILURE_STRINGS - // not threadsafe - static char invalid_chunk[] = "XXXX PNG chunk not known"; - invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); - invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); - invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); - invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); - #endif - return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); - } - stbi__skip(s, c.length); - break; - } - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - } -} - -static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri) -{ - void *result=NULL; - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { - if (p->depth <= 8) - ri->bits_per_channel = 8; - else if (p->depth == 16) - ri->bits_per_channel = 16; - else - return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth"); - result = p->out; - p->out = NULL; - if (req_comp && req_comp != p->s->img_out_n) { - if (ri->bits_per_channel == 8) - result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - else - result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - p->s->img_out_n = req_comp; - if (result == NULL) return result; - } - *x = p->s->img_x; - *y = p->s->img_y; - if (n) *n = p->s->img_n; - } - STBI_FREE(p->out); p->out = NULL; - STBI_FREE(p->expanded); p->expanded = NULL; - STBI_FREE(p->idata); p->idata = NULL; - - return result; -} - -static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi__png p; - p.s = s; - return stbi__do_png(&p, x,y,comp,req_comp, ri); -} - -static int stbi__png_test(stbi__context *s) -{ - int r; - r = stbi__check_png_header(s); - stbi__rewind(s); - return r; -} - -static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp) -{ - if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { - stbi__rewind( p->s ); - return 0; - } - if (x) *x = p->s->img_x; - if (y) *y = p->s->img_y; - if (comp) *comp = p->s->img_n; - return 1; -} - -static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) -{ - stbi__png p; - p.s = s; - return stbi__png_info_raw(&p, x, y, comp); -} - -static int stbi__png_is16(stbi__context *s) -{ - stbi__png p; - p.s = s; - if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) - return 0; - if (p.depth != 16) { - stbi__rewind(p.s); - return 0; - } - return 1; -} -#endif - -// Microsoft/Windows BMP image - -#ifndef STBI_NO_BMP -static int stbi__bmp_test_raw(stbi__context *s) -{ - int r; - int sz; - if (stbi__get8(s) != 'B') return 0; - if (stbi__get8(s) != 'M') return 0; - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - stbi__get32le(s); // discard data offset - sz = stbi__get32le(s); - r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); - return r; -} - -static int stbi__bmp_test(stbi__context *s) -{ - int r = stbi__bmp_test_raw(s); - stbi__rewind(s); - return r; -} - - -// returns 0..31 for the highest set bit -static int stbi__high_bit(unsigned int z) -{ - int n=0; - if (z == 0) return -1; - if (z >= 0x10000) { n += 16; z >>= 16; } - if (z >= 0x00100) { n += 8; z >>= 8; } - if (z >= 0x00010) { n += 4; z >>= 4; } - if (z >= 0x00004) { n += 2; z >>= 2; } - if (z >= 0x00002) { n += 1;/* >>= 1;*/ } - return n; -} - -static int stbi__bitcount(unsigned int a) -{ - a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 - a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 - a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits - a = (a + (a >> 8)); // max 16 per 8 bits - a = (a + (a >> 16)); // max 32 per 8 bits - return a & 0xff; -} - -// extract an arbitrarily-aligned N-bit value (N=bits) -// from v, and then make it 8-bits long and fractionally -// extend it to full full range. -static int stbi__shiftsigned(unsigned int v, int shift, int bits) -{ - static unsigned int mul_table[9] = { - 0, - 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, - 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, - }; - static unsigned int shift_table[9] = { - 0, 0,0,1,0,2,4,6,0, - }; - if (shift < 0) - v <<= -shift; - else - v >>= shift; - STBI_ASSERT(v < 256); - v >>= (8-bits); - STBI_ASSERT(bits >= 0 && bits <= 8); - return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits]; -} - -typedef struct -{ - int bpp, offset, hsz; - unsigned int mr,mg,mb,ma, all_a; - int extra_read; -} stbi__bmp_data; - -static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) -{ - int hsz; - if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - info->offset = stbi__get32le(s); - info->hsz = hsz = stbi__get32le(s); - info->mr = info->mg = info->mb = info->ma = 0; - info->extra_read = 14; - - if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP"); - - if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); - if (hsz == 12) { - s->img_x = stbi__get16le(s); - s->img_y = stbi__get16le(s); - } else { - s->img_x = stbi__get32le(s); - s->img_y = stbi__get32le(s); - } - if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); - info->bpp = stbi__get16le(s); - if (hsz != 12) { - int compress = stbi__get32le(s); - if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); - stbi__get32le(s); // discard sizeof - stbi__get32le(s); // discard hres - stbi__get32le(s); // discard vres - stbi__get32le(s); // discard colorsused - stbi__get32le(s); // discard max important - if (hsz == 40 || hsz == 56) { - if (hsz == 56) { - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - } - if (info->bpp == 16 || info->bpp == 32) { - if (compress == 0) { - if (info->bpp == 32) { - info->mr = 0xffu << 16; - info->mg = 0xffu << 8; - info->mb = 0xffu << 0; - info->ma = 0xffu << 24; - info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 - } else { - info->mr = 31u << 10; - info->mg = 31u << 5; - info->mb = 31u << 0; - } - } else if (compress == 3) { - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->extra_read += 12; - // not documented, but generated by photoshop and handled by mspaint - if (info->mr == info->mg && info->mg == info->mb) { - // ?!?!? - return stbi__errpuc("bad BMP", "bad BMP"); - } - } else - return stbi__errpuc("bad BMP", "bad BMP"); - } - } else { - int i; - if (hsz != 108 && hsz != 124) - return stbi__errpuc("bad BMP", "bad BMP"); - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->ma = stbi__get32le(s); - stbi__get32le(s); // discard color space - for (i=0; i < 12; ++i) - stbi__get32le(s); // discard color space parameters - if (hsz == 124) { - stbi__get32le(s); // discard rendering intent - stbi__get32le(s); // discard offset of profile data - stbi__get32le(s); // discard size of profile data - stbi__get32le(s); // discard reserved - } - } - } - return (void *) 1; -} - - -static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *out; - unsigned int mr=0,mg=0,mb=0,ma=0, all_a; - stbi_uc pal[256][4]; - int psize=0,i,j,width; - int flip_vertically, pad, target; - stbi__bmp_data info; - STBI_NOTUSED(ri); - - info.all_a = 255; - if (stbi__bmp_parse_header(s, &info) == NULL) - return NULL; // error code already set - - flip_vertically = ((int) s->img_y) > 0; - s->img_y = abs((int) s->img_y); - - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - mr = info.mr; - mg = info.mg; - mb = info.mb; - ma = info.ma; - all_a = info.all_a; - - if (info.hsz == 12) { - if (info.bpp < 24) - psize = (info.offset - info.extra_read - 24) / 3; - } else { - if (info.bpp < 16) - psize = (info.offset - info.extra_read - info.hsz) >> 2; - } - if (psize == 0) { - STBI_ASSERT(info.offset == s->callback_already_read + (int) (s->img_buffer - s->img_buffer_original)); - if (info.offset != s->callback_already_read + (s->img_buffer - s->buffer_start)) { - return stbi__errpuc("bad offset", "Corrupt BMP"); - } - } - - if (info.bpp == 24 && ma == 0xff000000) - s->img_n = 3; - else - s->img_n = ma ? 4 : 3; - if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 - target = req_comp; - else - target = s->img_n; // if they want monochrome, we'll post-convert - - // sanity-check size - if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "Corrupt BMP"); - - out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - if (info.bpp < 16) { - int z=0; - if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } - for (i=0; i < psize; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - if (info.hsz != 12) stbi__get8(s); - pal[i][3] = 255; - } - stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); - if (info.bpp == 1) width = (s->img_x + 7) >> 3; - else if (info.bpp == 4) width = (s->img_x + 1) >> 1; - else if (info.bpp == 8) width = s->img_x; - else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } - pad = (-width)&3; - if (info.bpp == 1) { - for (j=0; j < (int) s->img_y; ++j) { - int bit_offset = 7, v = stbi__get8(s); - for (i=0; i < (int) s->img_x; ++i) { - int color = (v>>bit_offset)&0x1; - out[z++] = pal[color][0]; - out[z++] = pal[color][1]; - out[z++] = pal[color][2]; - if (target == 4) out[z++] = 255; - if (i+1 == (int) s->img_x) break; - if((--bit_offset) < 0) { - bit_offset = 7; - v = stbi__get8(s); - } - } - stbi__skip(s, pad); - } - } else { - for (j=0; j < (int) s->img_y; ++j) { - for (i=0; i < (int) s->img_x; i += 2) { - int v=stbi__get8(s),v2=0; - if (info.bpp == 4) { - v2 = v & 15; - v >>= 4; - } - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - if (i+1 == (int) s->img_x) break; - v = (info.bpp == 8) ? stbi__get8(s) : v2; - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - } - stbi__skip(s, pad); - } - } - } else { - int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; - int z = 0; - int easy=0; - stbi__skip(s, info.offset - info.extra_read - info.hsz); - if (info.bpp == 24) width = 3 * s->img_x; - else if (info.bpp == 16) width = 2*s->img_x; - else /* bpp = 32 and pad = 0 */ width=0; - pad = (-width) & 3; - if (info.bpp == 24) { - easy = 1; - } else if (info.bpp == 32) { - if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) - easy = 2; - } - if (!easy) { - if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - // right shift amt to put high bit in position #7 - rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr); - gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg); - bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb); - ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma); - if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - } - for (j=0; j < (int) s->img_y; ++j) { - if (easy) { - for (i=0; i < (int) s->img_x; ++i) { - unsigned char a; - out[z+2] = stbi__get8(s); - out[z+1] = stbi__get8(s); - out[z+0] = stbi__get8(s); - z += 3; - a = (easy == 2 ? stbi__get8(s) : 255); - all_a |= a; - if (target == 4) out[z++] = a; - } - } else { - int bpp = info.bpp; - for (i=0; i < (int) s->img_x; ++i) { - stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); - unsigned int a; - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); - a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); - all_a |= a; - if (target == 4) out[z++] = STBI__BYTECAST(a); - } - } - stbi__skip(s, pad); - } - } - - // if alpha channel is all 0s, replace with all 255s - if (target == 4 && all_a == 0) - for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) - out[i] = 255; - - if (flip_vertically) { - stbi_uc t; - for (j=0; j < (int) s->img_y>>1; ++j) { - stbi_uc *p1 = out + j *s->img_x*target; - stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; - for (i=0; i < (int) s->img_x*target; ++i) { - t = p1[i]; p1[i] = p2[i]; p2[i] = t; - } - } - } - - if (req_comp && req_comp != target) { - out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - *x = s->img_x; - *y = s->img_y; - if (comp) *comp = s->img_n; - return out; -} -#endif - -// Targa Truevision - TGA -// by Jonathan Dummer -#ifndef STBI_NO_TGA -// returns STBI_rgb or whatever, 0 on error -static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) -{ - // only RGB or RGBA (incl. 16bit) or grey allowed - if (is_rgb16) *is_rgb16 = 0; - switch(bits_per_pixel) { - case 8: return STBI_grey; - case 16: if(is_grey) return STBI_grey_alpha; - // fallthrough - case 15: if(is_rgb16) *is_rgb16 = 1; - return STBI_rgb; - case 24: // fallthrough - case 32: return bits_per_pixel/8; - default: return 0; - } -} - -static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) -{ - int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; - int sz, tga_colormap_type; - stbi__get8(s); // discard Offset - tga_colormap_type = stbi__get8(s); // colormap type - if( tga_colormap_type > 1 ) { - stbi__rewind(s); - return 0; // only RGB or indexed allowed - } - tga_image_type = stbi__get8(s); // image type - if ( tga_colormap_type == 1 ) { // colormapped (paletted) image - if (tga_image_type != 1 && tga_image_type != 9) { - stbi__rewind(s); - return 0; - } - stbi__skip(s,4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { - stbi__rewind(s); - return 0; - } - stbi__skip(s,4); // skip image x and y origin - tga_colormap_bpp = sz; - } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE - if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { - stbi__rewind(s); - return 0; // only RGB or grey allowed, +/- RLE - } - stbi__skip(s,9); // skip colormap specification and image x/y origin - tga_colormap_bpp = 0; - } - tga_w = stbi__get16le(s); - if( tga_w < 1 ) { - stbi__rewind(s); - return 0; // test width - } - tga_h = stbi__get16le(s); - if( tga_h < 1 ) { - stbi__rewind(s); - return 0; // test height - } - tga_bits_per_pixel = stbi__get8(s); // bits per pixel - stbi__get8(s); // ignore alpha bits - if (tga_colormap_bpp != 0) { - if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { - // when using a colormap, tga_bits_per_pixel is the size of the indexes - // I don't think anything but 8 or 16bit indexes makes sense - stbi__rewind(s); - return 0; - } - tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); - } else { - tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); - } - if(!tga_comp) { - stbi__rewind(s); - return 0; - } - if (x) *x = tga_w; - if (y) *y = tga_h; - if (comp) *comp = tga_comp; - return 1; // seems to have passed everything -} - -static int stbi__tga_test(stbi__context *s) -{ - int res = 0; - int sz, tga_color_type; - stbi__get8(s); // discard Offset - tga_color_type = stbi__get8(s); // color type - if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed - sz = stbi__get8(s); // image type - if ( tga_color_type == 1 ) { // colormapped (paletted) image - if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 - stbi__skip(s,4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; - stbi__skip(s,4); // skip image x and y origin - } else { // "normal" image w/o colormap - if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE - stbi__skip(s,9); // skip colormap specification and image x/y origin - } - if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width - if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height - sz = stbi__get8(s); // bits per pixel - if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index - if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; - - res = 1; // if we got this far, everything's good and we can return 1 instead of 0 - -errorEnd: - stbi__rewind(s); - return res; -} - -// read 16bit value and convert to 24bit RGB -static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) -{ - stbi__uint16 px = (stbi__uint16)stbi__get16le(s); - stbi__uint16 fiveBitMask = 31; - // we have 3 channels with 5bits each - int r = (px >> 10) & fiveBitMask; - int g = (px >> 5) & fiveBitMask; - int b = px & fiveBitMask; - // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later - out[0] = (stbi_uc)((r * 255)/31); - out[1] = (stbi_uc)((g * 255)/31); - out[2] = (stbi_uc)((b * 255)/31); - - // some people claim that the most significant bit might be used for alpha - // (possibly if an alpha-bit is set in the "image descriptor byte") - // but that only made 16bit test images completely translucent.. - // so let's treat all 15 and 16bit TGAs as RGB with no alpha. -} - -static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - // read in the TGA header stuff - int tga_offset = stbi__get8(s); - int tga_indexed = stbi__get8(s); - int tga_image_type = stbi__get8(s); - int tga_is_RLE = 0; - int tga_palette_start = stbi__get16le(s); - int tga_palette_len = stbi__get16le(s); - int tga_palette_bits = stbi__get8(s); - int tga_x_origin = stbi__get16le(s); - int tga_y_origin = stbi__get16le(s); - int tga_width = stbi__get16le(s); - int tga_height = stbi__get16le(s); - int tga_bits_per_pixel = stbi__get8(s); - int tga_comp, tga_rgb16=0; - int tga_inverted = stbi__get8(s); - // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) - // image data - unsigned char *tga_data; - unsigned char *tga_palette = NULL; - int i, j; - unsigned char raw_data[4] = {0}; - int RLE_count = 0; - int RLE_repeating = 0; - int read_next_pixel = 1; - STBI_NOTUSED(ri); - STBI_NOTUSED(tga_x_origin); // @TODO - STBI_NOTUSED(tga_y_origin); // @TODO - - if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - // do a tiny bit of precessing - if ( tga_image_type >= 8 ) - { - tga_image_type -= 8; - tga_is_RLE = 1; - } - tga_inverted = 1 - ((tga_inverted >> 5) & 1); - - // If I'm paletted, then I'll use the number of bits from the palette - if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); - else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); - - if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency - return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); - - // tga info - *x = tga_width; - *y = tga_height; - if (comp) *comp = tga_comp; - - if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) - return stbi__errpuc("too large", "Corrupt TGA"); - - tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); - if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); - - // skip to the data's starting position (offset usually = 0) - stbi__skip(s, tga_offset ); - - if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { - for (i=0; i < tga_height; ++i) { - int row = tga_inverted ? tga_height -i - 1 : i; - stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; - stbi__getn(s, tga_row, tga_width * tga_comp); - } - } else { - // do I need to load a palette? - if ( tga_indexed) - { - if (tga_palette_len == 0) { /* you have to have at least one entry! */ - STBI_FREE(tga_data); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - - // any data to skip? (offset usually = 0) - stbi__skip(s, tga_palette_start ); - // load the palette - tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); - if (!tga_palette) { - STBI_FREE(tga_data); - return stbi__errpuc("outofmem", "Out of memory"); - } - if (tga_rgb16) { - stbi_uc *pal_entry = tga_palette; - STBI_ASSERT(tga_comp == STBI_rgb); - for (i=0; i < tga_palette_len; ++i) { - stbi__tga_read_rgb16(s, pal_entry); - pal_entry += tga_comp; - } - } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { - STBI_FREE(tga_data); - STBI_FREE(tga_palette); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - } - // load the data - for (i=0; i < tga_width * tga_height; ++i) - { - // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? - if ( tga_is_RLE ) - { - if ( RLE_count == 0 ) - { - // yep, get the next byte as a RLE command - int RLE_cmd = stbi__get8(s); - RLE_count = 1 + (RLE_cmd & 127); - RLE_repeating = RLE_cmd >> 7; - read_next_pixel = 1; - } else if ( !RLE_repeating ) - { - read_next_pixel = 1; - } - } else - { - read_next_pixel = 1; - } - // OK, if I need to read a pixel, do it now - if ( read_next_pixel ) - { - // load however much data we did have - if ( tga_indexed ) - { - // read in index, then perform the lookup - int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); - if ( pal_idx >= tga_palette_len ) { - // invalid index - pal_idx = 0; - } - pal_idx *= tga_comp; - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = tga_palette[pal_idx+j]; - } - } else if(tga_rgb16) { - STBI_ASSERT(tga_comp == STBI_rgb); - stbi__tga_read_rgb16(s, raw_data); - } else { - // read in the data raw - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = stbi__get8(s); - } - } - // clear the reading flag for the next pixel - read_next_pixel = 0; - } // end of reading a pixel - - // copy data - for (j = 0; j < tga_comp; ++j) - tga_data[i*tga_comp+j] = raw_data[j]; - - // in case we're in RLE mode, keep counting down - --RLE_count; - } - // do I need to invert the image? - if ( tga_inverted ) - { - for (j = 0; j*2 < tga_height; ++j) - { - int index1 = j * tga_width * tga_comp; - int index2 = (tga_height - 1 - j) * tga_width * tga_comp; - for (i = tga_width * tga_comp; i > 0; --i) - { - unsigned char temp = tga_data[index1]; - tga_data[index1] = tga_data[index2]; - tga_data[index2] = temp; - ++index1; - ++index2; - } - } - } - // clear my palette, if I had one - if ( tga_palette != NULL ) - { - STBI_FREE( tga_palette ); - } - } - - // swap RGB - if the source data was RGB16, it already is in the right order - if (tga_comp >= 3 && !tga_rgb16) - { - unsigned char* tga_pixel = tga_data; - for (i=0; i < tga_width * tga_height; ++i) - { - unsigned char temp = tga_pixel[0]; - tga_pixel[0] = tga_pixel[2]; - tga_pixel[2] = temp; - tga_pixel += tga_comp; - } - } - - // convert to target component count - if (req_comp && req_comp != tga_comp) - tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); - - // the things I do to get rid of an error message, and yet keep - // Microsoft's C compilers happy... [8^( - tga_palette_start = tga_palette_len = tga_palette_bits = - tga_x_origin = tga_y_origin = 0; - STBI_NOTUSED(tga_palette_start); - // OK, done - return tga_data; -} -#endif - -// ************************************************************************************************* -// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context *s) -{ - int r = (stbi__get32be(s) == 0x38425053); - stbi__rewind(s); - return r; -} - -static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount) -{ - int count, nleft, len; - - count = 0; - while ((nleft = pixelCount - count) > 0) { - len = stbi__get8(s); - if (len == 128) { - // No-op. - } else if (len < 128) { - // Copy next len+1 bytes literally. - len++; - if (len > nleft) return 0; // corrupt data - count += len; - while (len) { - *p = stbi__get8(s); - p += 4; - len--; - } - } else if (len > 128) { - stbi_uc val; - // Next -len+1 bytes in the dest are replicated from next source byte. - // (Interpret len as a negative 8-bit int.) - len = 257 - len; - if (len > nleft) return 0; // corrupt data - val = stbi__get8(s); - count += len; - while (len) { - *p = val; - p += 4; - len--; - } - } - } - - return 1; -} - -static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) -{ - int pixelCount; - int channelCount, compression; - int channel, i; - int bitdepth; - int w,h; - stbi_uc *out; - STBI_NOTUSED(ri); - - // Check identifier - if (stbi__get32be(s) != 0x38425053) // "8BPS" - return stbi__errpuc("not PSD", "Corrupt PSD image"); - - // Check file type version. - if (stbi__get16be(s) != 1) - return stbi__errpuc("wrong version", "Unsupported version of PSD image"); - - // Skip 6 reserved bytes. - stbi__skip(s, 6 ); - - // Read the number of channels (R, G, B, A, etc). - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) - return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); - - // Read the rows and columns of the image. - h = stbi__get32be(s); - w = stbi__get32be(s); - - if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - // Make sure the depth is 8 bits. - bitdepth = stbi__get16be(s); - if (bitdepth != 8 && bitdepth != 16) - return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); - - // Make sure the color mode is RGB. - // Valid options are: - // 0: Bitmap - // 1: Grayscale - // 2: Indexed color - // 3: RGB color - // 4: CMYK color - // 7: Multichannel - // 8: Duotone - // 9: Lab color - if (stbi__get16be(s) != 3) - return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); - - // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) - stbi__skip(s,stbi__get32be(s) ); - - // Skip the image resources. (resolution, pen tool paths, etc) - stbi__skip(s, stbi__get32be(s) ); - - // Skip the reserved data. - stbi__skip(s, stbi__get32be(s) ); - - // Find out if the data is compressed. - // Known values: - // 0: no compression - // 1: RLE compressed - compression = stbi__get16be(s); - if (compression > 1) - return stbi__errpuc("bad compression", "PSD has an unknown compression format"); - - // Check size - if (!stbi__mad3sizes_valid(4, w, h, 0)) - return stbi__errpuc("too large", "Corrupt PSD"); - - // Create the destination image. - - if (!compression && bitdepth == 16 && bpc == 16) { - out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0); - ri->bits_per_channel = 16; - } else - out = (stbi_uc *) stbi__malloc(4 * w*h); - - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - pixelCount = w*h; - - // Initialize the data to zero. - //memset( out, 0, pixelCount * 4 ); - - // Finally, the image data. - if (compression) { - // RLE as used by .PSD and .TIFF - // Loop until you get the number of unpacked bytes you are expecting: - // Read the next source byte into n. - // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. - // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. - // Else if n is 128, noop. - // Endloop - - // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, - // which we're going to just skip. - stbi__skip(s, h * channelCount * 2 ); - - // Read the RLE data by channel. - for (channel = 0; channel < 4; channel++) { - stbi_uc *p; - - p = out+channel; - if (channel >= channelCount) { - // Fill this channel with default data. - for (i = 0; i < pixelCount; i++, p += 4) - *p = (channel == 3 ? 255 : 0); - } else { - // Read the RLE data. - if (!stbi__psd_decode_rle(s, p, pixelCount)) { - STBI_FREE(out); - return stbi__errpuc("corrupt", "bad RLE data"); - } - } - } - - } else { - // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) - // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. - - // Read the data by channel. - for (channel = 0; channel < 4; channel++) { - if (channel >= channelCount) { - // Fill this channel with default data. - if (bitdepth == 16 && bpc == 16) { - stbi__uint16 *q = ((stbi__uint16 *) out) + channel; - stbi__uint16 val = channel == 3 ? 65535 : 0; - for (i = 0; i < pixelCount; i++, q += 4) - *q = val; - } else { - stbi_uc *p = out+channel; - stbi_uc val = channel == 3 ? 255 : 0; - for (i = 0; i < pixelCount; i++, p += 4) - *p = val; - } - } else { - if (ri->bits_per_channel == 16) { // output bpc - stbi__uint16 *q = ((stbi__uint16 *) out) + channel; - for (i = 0; i < pixelCount; i++, q += 4) - *q = (stbi__uint16) stbi__get16be(s); - } else { - stbi_uc *p = out+channel; - if (bitdepth == 16) { // input bpc - for (i = 0; i < pixelCount; i++, p += 4) - *p = (stbi_uc) (stbi__get16be(s) >> 8); - } else { - for (i = 0; i < pixelCount; i++, p += 4) - *p = stbi__get8(s); - } - } - } - } - } - - // remove weird white matte from PSD - if (channelCount >= 4) { - if (ri->bits_per_channel == 16) { - for (i=0; i < w*h; ++i) { - stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i; - if (pixel[3] != 0 && pixel[3] != 65535) { - float a = pixel[3] / 65535.0f; - float ra = 1.0f / a; - float inv_a = 65535.0f * (1 - ra); - pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a); - pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a); - pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a); - } - } - } else { - for (i=0; i < w*h; ++i) { - unsigned char *pixel = out + 4*i; - if (pixel[3] != 0 && pixel[3] != 255) { - float a = pixel[3] / 255.0f; - float ra = 1.0f / a; - float inv_a = 255.0f * (1 - ra); - pixel[0] = (unsigned char) (pixel[0]*ra + inv_a); - pixel[1] = (unsigned char) (pixel[1]*ra + inv_a); - pixel[2] = (unsigned char) (pixel[2]*ra + inv_a); - } - } - } - } - - // convert to desired output format - if (req_comp && req_comp != 4) { - if (ri->bits_per_channel == 16) - out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h); - else - out = stbi__convert_format(out, 4, req_comp, w, h); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - if (comp) *comp = 4; - *y = h; - *x = w; - - return out; -} -#endif - -// ************************************************************************************************* -// Softimage PIC loader -// by Tom Seddon -// -// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format -// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ - -#ifndef STBI_NO_PIC -static int stbi__pic_is4(stbi__context *s,const char *str) -{ - int i; - for (i=0; i<4; ++i) - if (stbi__get8(s) != (stbi_uc)str[i]) - return 0; - - return 1; -} - -static int stbi__pic_test_core(stbi__context *s) -{ - int i; - - if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) - return 0; - - for(i=0;i<84;++i) - stbi__get8(s); - - if (!stbi__pic_is4(s,"PICT")) - return 0; - - return 1; -} - -typedef struct -{ - stbi_uc size,type,channel; -} stbi__pic_packet; - -static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest) -{ - int mask=0x80, i; - - for (i=0; i<4; ++i, mask>>=1) { - if (channel & mask) { - if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short"); - dest[i]=stbi__get8(s); - } - } - - return dest; -} - -static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src) -{ - int mask=0x80,i; - - for (i=0;i<4; ++i, mask>>=1) - if (channel&mask) - dest[i]=src[i]; -} - -static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result) -{ - int act_comp=0,num_packets=0,y,chained; - stbi__pic_packet packets[10]; - - // this will (should...) cater for even some bizarre stuff like having data - // for the same channel in multiple packets. - do { - stbi__pic_packet *packet; - - if (num_packets==sizeof(packets)/sizeof(packets[0])) - return stbi__errpuc("bad format","too many packets"); - - packet = &packets[num_packets++]; - - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - - act_comp |= packet->channel; - - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)"); - if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp"); - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? - - for(y=0; ytype) { - default: - return stbi__errpuc("bad format","packet has bad compression type"); - - case 0: {//uncompressed - int x; - - for(x=0;xchannel,dest)) - return 0; - break; - } - - case 1://Pure RLE - { - int left=width, i; - - while (left>0) { - stbi_uc count,value[4]; - - count=stbi__get8(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)"); - - if (count > left) - count = (stbi_uc) left; - - if (!stbi__readval(s,packet->channel,value)) return 0; - - for(i=0; ichannel,dest,value); - left -= count; - } - } - break; - - case 2: {//Mixed RLE - int left=width; - while (left>0) { - int count = stbi__get8(s), i; - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)"); - - if (count >= 128) { // Repeated - stbi_uc value[4]; - - if (count==128) - count = stbi__get16be(s); - else - count -= 127; - if (count > left) - return stbi__errpuc("bad file","scanline overrun"); - - if (!stbi__readval(s,packet->channel,value)) - return 0; - - for(i=0;ichannel,dest,value); - } else { // Raw - ++count; - if (count>left) return stbi__errpuc("bad file","scanline overrun"); - - for(i=0;ichannel,dest)) - return 0; - } - left-=count; - } - break; - } - } - } - } - - return result; -} - -static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri) -{ - stbi_uc *result; - int i, x,y, internal_comp; - STBI_NOTUSED(ri); - - if (!comp) comp = &internal_comp; - - for (i=0; i<92; ++i) - stbi__get8(s); - - x = stbi__get16be(s); - y = stbi__get16be(s); - - if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); - if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); - - stbi__get32be(s); //skip `ratio' - stbi__get16be(s); //skip `fields' - stbi__get16be(s); //skip `pad' - - // intermediate buffer is RGBA - result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); - memset(result, 0xff, x*y*4); - - if (!stbi__pic_load_core(s,x,y,comp, result)) { - STBI_FREE(result); - result=0; - } - *px = x; - *py = y; - if (req_comp == 0) req_comp = *comp; - result=stbi__convert_format(result,4,req_comp,x,y); - - return result; -} - -static int stbi__pic_test(stbi__context *s) -{ - int r = stbi__pic_test_core(s); - stbi__rewind(s); - return r; -} -#endif - -// ************************************************************************************************* -// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb - -#ifndef STBI_NO_GIF -typedef struct -{ - stbi__int16 prefix; - stbi_uc first; - stbi_uc suffix; -} stbi__gif_lzw; - -typedef struct -{ - int w,h; - stbi_uc *out; // output buffer (always 4 components) - stbi_uc *background; // The current "background" as far as a gif is concerned - stbi_uc *history; - int flags, bgindex, ratio, transparent, eflags; - stbi_uc pal[256][4]; - stbi_uc lpal[256][4]; - stbi__gif_lzw codes[8192]; - stbi_uc *color_table; - int parse, step; - int lflags; - int start_x, start_y; - int max_x, max_y; - int cur_x, cur_y; - int line_size; - int delay; -} stbi__gif; - -static int stbi__gif_test_raw(stbi__context *s) -{ - int sz; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; - sz = stbi__get8(s); - if (sz != '9' && sz != '7') return 0; - if (stbi__get8(s) != 'a') return 0; - return 1; -} - -static int stbi__gif_test(stbi__context *s) -{ - int r = stbi__gif_test_raw(s); - stbi__rewind(s); - return r; -} - -static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp) -{ - int i; - for (i=0; i < num_entries; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - pal[i][3] = transp == i ? 0 : 255; - } -} - -static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info) -{ - stbi_uc version; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') - return stbi__err("not GIF", "Corrupt GIF"); - - version = stbi__get8(s); - if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); - if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); - - stbi__g_failure_reason = ""; - g->w = stbi__get16le(s); - g->h = stbi__get16le(s); - g->flags = stbi__get8(s); - g->bgindex = stbi__get8(s); - g->ratio = stbi__get8(s); - g->transparent = -1; - - if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); - - if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments - - if (is_info) return 1; - - if (g->flags & 0x80) - stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1); - - return 1; -} - -static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) -{ - stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); - if (!stbi__gif_header(s, g, comp, 1)) { - STBI_FREE(g); - stbi__rewind( s ); - return 0; - } - if (x) *x = g->w; - if (y) *y = g->h; - STBI_FREE(g); - return 1; -} - -static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) -{ - stbi_uc *p, *c; - int idx; - - // recurse to decode the prefixes, since the linked-list is backwards, - // and working backwards through an interleaved image would be nasty - if (g->codes[code].prefix >= 0) - stbi__out_gif_code(g, g->codes[code].prefix); - - if (g->cur_y >= g->max_y) return; - - idx = g->cur_x + g->cur_y; - p = &g->out[idx]; - g->history[idx / 4] = 1; - - c = &g->color_table[g->codes[code].suffix * 4]; - if (c[3] > 128) { // don't render transparent pixels; - p[0] = c[2]; - p[1] = c[1]; - p[2] = c[0]; - p[3] = c[3]; - } - g->cur_x += 4; - - if (g->cur_x >= g->max_x) { - g->cur_x = g->start_x; - g->cur_y += g->step; - - while (g->cur_y >= g->max_y && g->parse > 0) { - g->step = (1 << g->parse) * g->line_size; - g->cur_y = g->start_y + (g->step >> 1); - --g->parse; - } - } -} - -static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) -{ - stbi_uc lzw_cs; - stbi__int32 len, init_code; - stbi__uint32 first; - stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; - stbi__gif_lzw *p; - - lzw_cs = stbi__get8(s); - if (lzw_cs > 12) return NULL; - clear = 1 << lzw_cs; - first = 1; - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - bits = 0; - valid_bits = 0; - for (init_code = 0; init_code < clear; init_code++) { - g->codes[init_code].prefix = -1; - g->codes[init_code].first = (stbi_uc) init_code; - g->codes[init_code].suffix = (stbi_uc) init_code; - } - - // support no starting clear code - avail = clear+2; - oldcode = -1; - - len = 0; - for(;;) { - if (valid_bits < codesize) { - if (len == 0) { - len = stbi__get8(s); // start new block - if (len == 0) - return g->out; - } - --len; - bits |= (stbi__int32) stbi__get8(s) << valid_bits; - valid_bits += 8; - } else { - stbi__int32 code = bits & codemask; - bits >>= codesize; - valid_bits -= codesize; - // @OPTIMIZE: is there some way we can accelerate the non-clear path? - if (code == clear) { // clear code - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - avail = clear + 2; - oldcode = -1; - first = 0; - } else if (code == clear + 1) { // end of stream code - stbi__skip(s, len); - while ((len = stbi__get8(s)) > 0) - stbi__skip(s,len); - return g->out; - } else if (code <= avail) { - if (first) { - return stbi__errpuc("no clear code", "Corrupt GIF"); - } - - if (oldcode >= 0) { - p = &g->codes[avail++]; - if (avail > 8192) { - return stbi__errpuc("too many codes", "Corrupt GIF"); - } - - p->prefix = (stbi__int16) oldcode; - p->first = g->codes[oldcode].first; - p->suffix = (code == avail) ? p->first : g->codes[code].first; - } else if (code == avail) - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - - stbi__out_gif_code(g, (stbi__uint16) code); - - if ((avail & codemask) == 0 && avail <= 0x0FFF) { - codesize++; - codemask = (1 << codesize) - 1; - } - - oldcode = code; - } else { - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - } - } - } -} - -// this function is designed to support animated gifs, although stb_image doesn't support it -// two back is the image from two frames ago, used for a very specific disposal format -static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back) -{ - int dispose; - int first_frame; - int pi; - int pcount; - STBI_NOTUSED(req_comp); - - // on first frame, any non-written pixels get the background colour (non-transparent) - first_frame = 0; - if (g->out == 0) { - if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header - if (!stbi__mad3sizes_valid(4, g->w, g->h, 0)) - return stbi__errpuc("too large", "GIF image is too large"); - pcount = g->w * g->h; - g->out = (stbi_uc *) stbi__malloc(4 * pcount); - g->background = (stbi_uc *) stbi__malloc(4 * pcount); - g->history = (stbi_uc *) stbi__malloc(pcount); - if (!g->out || !g->background || !g->history) - return stbi__errpuc("outofmem", "Out of memory"); - - // image is treated as "transparent" at the start - ie, nothing overwrites the current background; - // background colour is only used for pixels that are not rendered first frame, after that "background" - // color refers to the color that was there the previous frame. - memset(g->out, 0x00, 4 * pcount); - memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent) - memset(g->history, 0x00, pcount); // pixels that were affected previous frame - first_frame = 1; - } else { - // second frame - how do we dispose of the previous one? - dispose = (g->eflags & 0x1C) >> 2; - pcount = g->w * g->h; - - if ((dispose == 3) && (two_back == 0)) { - dispose = 2; // if I don't have an image to revert back to, default to the old background - } - - if (dispose == 3) { // use previous graphic - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); - } - } - } else if (dispose == 2) { - // restore what was changed last frame to background before that frame; - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); - } - } - } else { - // This is a non-disposal case eithe way, so just - // leave the pixels as is, and they will become the new background - // 1: do not dispose - // 0: not specified. - } - - // background is what out is after the undoing of the previou frame; - memcpy( g->background, g->out, 4 * g->w * g->h ); - } - - // clear my history; - memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame - - for (;;) { - int tag = stbi__get8(s); - switch (tag) { - case 0x2C: /* Image Descriptor */ - { - stbi__int32 x, y, w, h; - stbi_uc *o; - - x = stbi__get16le(s); - y = stbi__get16le(s); - w = stbi__get16le(s); - h = stbi__get16le(s); - if (((x + w) > (g->w)) || ((y + h) > (g->h))) - return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); - - g->line_size = g->w * 4; - g->start_x = x * 4; - g->start_y = y * g->line_size; - g->max_x = g->start_x + w * 4; - g->max_y = g->start_y + h * g->line_size; - g->cur_x = g->start_x; - g->cur_y = g->start_y; - - // if the width of the specified rectangle is 0, that means - // we may not see *any* pixels or the image is malformed; - // to make sure this is caught, move the current y down to - // max_y (which is what out_gif_code checks). - if (w == 0) - g->cur_y = g->max_y; - - g->lflags = stbi__get8(s); - - if (g->lflags & 0x40) { - g->step = 8 * g->line_size; // first interlaced spacing - g->parse = 3; - } else { - g->step = g->line_size; - g->parse = 0; - } - - if (g->lflags & 0x80) { - stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); - g->color_table = (stbi_uc *) g->lpal; - } else if (g->flags & 0x80) { - g->color_table = (stbi_uc *) g->pal; - } else - return stbi__errpuc("missing color table", "Corrupt GIF"); - - o = stbi__process_gif_raster(s, g); - if (!o) return NULL; - - // if this was the first frame, - pcount = g->w * g->h; - if (first_frame && (g->bgindex > 0)) { - // if first frame, any pixel not drawn to gets the background color - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi] == 0) { - g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; - memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); - } - } - } - - return o; - } - - case 0x21: // Comment Extension. - { - int len; - int ext = stbi__get8(s); - if (ext == 0xF9) { // Graphic Control Extension. - len = stbi__get8(s); - if (len == 4) { - g->eflags = stbi__get8(s); - g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. - - // unset old transparent - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 255; - } - if (g->eflags & 0x01) { - g->transparent = stbi__get8(s); - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 0; - } - } else { - // don't need transparent - stbi__skip(s, 1); - g->transparent = -1; - } - } else { - stbi__skip(s, len); - break; - } - } - while ((len = stbi__get8(s)) != 0) { - stbi__skip(s, len); - } - break; - } - - case 0x3B: // gif stream termination code - return (stbi_uc *) s; // using '1' causes warning on some compilers - - default: - return stbi__errpuc("unknown code", "Corrupt GIF"); - } - } -} - -static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp) -{ - if (stbi__gif_test(s)) { - int layers = 0; - stbi_uc *u = 0; - stbi_uc *out = 0; - stbi_uc *two_back = 0; - stbi__gif g; - int stride; - int out_size = 0; - int delays_size = 0; - memset(&g, 0, sizeof(g)); - if (delays) { - *delays = 0; - } - - do { - u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); - if (u == (stbi_uc *) s) u = 0; // end of animated gif marker - - if (u) { - *x = g.w; - *y = g.h; - ++layers; - stride = g.w * g.h * 4; - - if (out) { - void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride ); - if (NULL == tmp) { - STBI_FREE(g.out); - STBI_FREE(g.history); - STBI_FREE(g.background); - return stbi__errpuc("outofmem", "Out of memory"); - } - else { - out = (stbi_uc*) tmp; - out_size = layers * stride; - } - - if (delays) { - *delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers ); - delays_size = layers * sizeof(int); - } - } else { - out = (stbi_uc*)stbi__malloc( layers * stride ); - out_size = layers * stride; - if (delays) { - *delays = (int*) stbi__malloc( layers * sizeof(int) ); - delays_size = layers * sizeof(int); - } - } - memcpy( out + ((layers - 1) * stride), u, stride ); - if (layers >= 2) { - two_back = out - 2 * stride; - } - - if (delays) { - (*delays)[layers - 1U] = g.delay; - } - } - } while (u != 0); - - // free temp buffer; - STBI_FREE(g.out); - STBI_FREE(g.history); - STBI_FREE(g.background); - - // do the final conversion after loading everything; - if (req_comp && req_comp != 4) - out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); - - *z = layers; - return out; - } else { - return stbi__errpuc("not GIF", "Image was not as a gif type."); - } -} - -static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *u = 0; - stbi__gif g; - memset(&g, 0, sizeof(g)); - STBI_NOTUSED(ri); - - u = stbi__gif_load_next(s, &g, comp, req_comp, 0); - if (u == (stbi_uc *) s) u = 0; // end of animated gif marker - if (u) { - *x = g.w; - *y = g.h; - - // moved conversion to after successful load so that the same - // can be done for multiple frames. - if (req_comp && req_comp != 4) - u = stbi__convert_format(u, 4, req_comp, g.w, g.h); - } else if (g.out) { - // if there was an error and we allocated an image buffer, free it! - STBI_FREE(g.out); - } - - // free buffers needed for multiple frame loading; - STBI_FREE(g.history); - STBI_FREE(g.background); - - return u; -} - -static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) -{ - return stbi__gif_info_raw(s,x,y,comp); -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR loader -// originally by Nicolas Schulz -#ifndef STBI_NO_HDR -static int stbi__hdr_test_core(stbi__context *s, const char *signature) -{ - int i; - for (i=0; signature[i]; ++i) - if (stbi__get8(s) != signature[i]) - return 0; - stbi__rewind(s); - return 1; -} - -static int stbi__hdr_test(stbi__context* s) -{ - int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); - stbi__rewind(s); - if(!r) { - r = stbi__hdr_test_core(s, "#?RGBE\n"); - stbi__rewind(s); - } - return r; -} - -#define STBI__HDR_BUFLEN 1024 -static char *stbi__hdr_gettoken(stbi__context *z, char *buffer) -{ - int len=0; - char c = '\0'; - - c = (char) stbi__get8(z); - - while (!stbi__at_eof(z) && c != '\n') { - buffer[len++] = c; - if (len == STBI__HDR_BUFLEN-1) { - // flush to end of line - while (!stbi__at_eof(z) && stbi__get8(z) != '\n') - ; - break; - } - c = (char) stbi__get8(z); - } - - buffer[len] = 0; - return buffer; -} - -static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) -{ - if ( input[3] != 0 ) { - float f1; - // Exponent - f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); - if (req_comp <= 2) - output[0] = (input[0] + input[1] + input[2]) * f1 / 3; - else { - output[0] = input[0] * f1; - output[1] = input[1] * f1; - output[2] = input[2] * f1; - } - if (req_comp == 2) output[1] = 1; - if (req_comp == 4) output[3] = 1; - } else { - switch (req_comp) { - case 4: output[3] = 1; /* fallthrough */ - case 3: output[0] = output[1] = output[2] = 0; - break; - case 2: output[1] = 1; /* fallthrough */ - case 1: output[0] = 0; - break; - } - } -} - -static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - char buffer[STBI__HDR_BUFLEN]; - char *token; - int valid = 0; - int width, height; - stbi_uc *scanline; - float *hdr_data; - int len; - unsigned char count, value; - int i, j, k, c1,c2, z; - const char *headerToken; - STBI_NOTUSED(ri); - - // Check identifier - headerToken = stbi__hdr_gettoken(s,buffer); - if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) - return stbi__errpf("not HDR", "Corrupt HDR image"); - - // Parse header - for(;;) { - token = stbi__hdr_gettoken(s,buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); - - // Parse width and height - // can't use sscanf() if we're not using stdio! - token = stbi__hdr_gettoken(s,buffer); - if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - height = (int) strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - width = (int) strtol(token, NULL, 10); - - if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); - if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); - - *x = width; - *y = height; - - if (comp) *comp = 3; - if (req_comp == 0) req_comp = 3; - - if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) - return stbi__errpf("too large", "HDR image is too large"); - - // Read data - hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); - if (!hdr_data) - return stbi__errpf("outofmem", "Out of memory"); - - // Load image data - // image data is stored as some number of sca - if ( width < 8 || width >= 32768) { - // Read flat data - for (j=0; j < height; ++j) { - for (i=0; i < width; ++i) { - stbi_uc rgbe[4]; - main_decode_loop: - stbi__getn(s, rgbe, 4); - stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); - } - } - } else { - // Read RLE-encoded data - scanline = NULL; - - for (j = 0; j < height; ++j) { - c1 = stbi__get8(s); - c2 = stbi__get8(s); - len = stbi__get8(s); - if (c1 != 2 || c2 != 2 || (len & 0x80)) { - // not run-length encoded, so we have to actually use THIS data as a decoded - // pixel (note this can't be a valid pixel--one of RGB must be >= 128) - stbi_uc rgbe[4]; - rgbe[0] = (stbi_uc) c1; - rgbe[1] = (stbi_uc) c2; - rgbe[2] = (stbi_uc) len; - rgbe[3] = (stbi_uc) stbi__get8(s); - stbi__hdr_convert(hdr_data, rgbe, req_comp); - i = 1; - j = 0; - STBI_FREE(scanline); - goto main_decode_loop; // yes, this makes no sense - } - len <<= 8; - len |= stbi__get8(s); - if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } - if (scanline == NULL) { - scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0); - if (!scanline) { - STBI_FREE(hdr_data); - return stbi__errpf("outofmem", "Out of memory"); - } - } - - for (k = 0; k < 4; ++k) { - int nleft; - i = 0; - while ((nleft = width - i) > 0) { - count = stbi__get8(s); - if (count > 128) { - // Run - value = stbi__get8(s); - count -= 128; - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = value; - } else { - // Dump - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = stbi__get8(s); - } - } - } - for (i=0; i < width; ++i) - stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); - } - if (scanline) - STBI_FREE(scanline); - } - - return hdr_data; -} - -static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) -{ - char buffer[STBI__HDR_BUFLEN]; - char *token; - int valid = 0; - int dummy; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (stbi__hdr_test(s) == 0) { - stbi__rewind( s ); - return 0; - } - - for(;;) { - token = stbi__hdr_gettoken(s,buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) { - stbi__rewind( s ); - return 0; - } - token = stbi__hdr_gettoken(s,buffer); - if (strncmp(token, "-Y ", 3)) { - stbi__rewind( s ); - return 0; - } - token += 3; - *y = (int) strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) { - stbi__rewind( s ); - return 0; - } - token += 3; - *x = (int) strtol(token, NULL, 10); - *comp = 3; - return 1; -} -#endif // STBI_NO_HDR - -#ifndef STBI_NO_BMP -static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) -{ - void *p; - stbi__bmp_data info; - - info.all_a = 255; - p = stbi__bmp_parse_header(s, &info); - stbi__rewind( s ); - if (p == NULL) - return 0; - if (x) *x = s->img_x; - if (y) *y = s->img_y; - if (comp) { - if (info.bpp == 24 && info.ma == 0xff000000) - *comp = 3; - else - *comp = info.ma ? 4 : 3; - } - return 1; -} -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) -{ - int channelCount, dummy, depth; - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind( s ); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind( s ); - return 0; - } - *y = stbi__get32be(s); - *x = stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 8 && depth != 16) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 3) { - stbi__rewind( s ); - return 0; - } - *comp = 4; - return 1; -} - -static int stbi__psd_is16(stbi__context *s) -{ - int channelCount, depth; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind( s ); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind( s ); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind( s ); - return 0; - } - (void) stbi__get32be(s); - (void) stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 16) { - stbi__rewind( s ); - return 0; - } - return 1; -} -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) -{ - int act_comp=0,num_packets=0,chained,dummy; - stbi__pic_packet packets[10]; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 88); - - *x = stbi__get16be(s); - *y = stbi__get16be(s); - if (stbi__at_eof(s)) { - stbi__rewind( s); - return 0; - } - if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { - stbi__rewind( s ); - return 0; - } - - stbi__skip(s, 8); - - do { - stbi__pic_packet *packet; - - if (num_packets==sizeof(packets)/sizeof(packets[0])) - return 0; - - packet = &packets[num_packets++]; - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - act_comp |= packet->channel; - - if (stbi__at_eof(s)) { - stbi__rewind( s ); - return 0; - } - if (packet->size != 8) { - stbi__rewind( s ); - return 0; - } - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); - - return 1; -} -#endif - -// ************************************************************************************************* -// Portable Gray Map and Portable Pixel Map loader -// by Ken Miller -// -// PGM: http://netpbm.sourceforge.net/doc/pgm.html -// PPM: http://netpbm.sourceforge.net/doc/ppm.html -// -// Known limitations: -// Does not support comments in the header section -// Does not support ASCII image data (formats P2 and P3) -// Does not support 16-bit-per-channel - -#ifndef STBI_NO_PNM - -static int stbi__pnm_test(stbi__context *s) -{ - char p, t; - p = (char) stbi__get8(s); - t = (char) stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind( s ); - return 0; - } - return 1; -} - -static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) -{ - stbi_uc *out; - STBI_NOTUSED(ri); - - if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n)) - return 0; - - if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); - - *x = s->img_x; - *y = s->img_y; - if (comp) *comp = s->img_n; - - if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "PNM too large"); - - out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - stbi__getn(s, out, s->img_n * s->img_x * s->img_y); - - if (req_comp && req_comp != s->img_n) { - out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - return out; -} - -static int stbi__pnm_isspace(char c) -{ - return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; -} - -static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) -{ - for (;;) { - while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) - *c = (char) stbi__get8(s); - - if (stbi__at_eof(s) || *c != '#') - break; - - while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) - *c = (char) stbi__get8(s); - } -} - -static int stbi__pnm_isdigit(char c) -{ - return c >= '0' && c <= '9'; -} - -static int stbi__pnm_getinteger(stbi__context *s, char *c) -{ - int value = 0; - - while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { - value = value*10 + (*c - '0'); - *c = (char) stbi__get8(s); - } - - return value; -} - -static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) -{ - int maxv, dummy; - char c, p, t; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - stbi__rewind(s); - - // Get identifier - p = (char) stbi__get8(s); - t = (char) stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - - *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm - - c = (char) stbi__get8(s); - stbi__pnm_skip_whitespace(s, &c); - - *x = stbi__pnm_getinteger(s, &c); // read width - stbi__pnm_skip_whitespace(s, &c); - - *y = stbi__pnm_getinteger(s, &c); // read height - stbi__pnm_skip_whitespace(s, &c); - - maxv = stbi__pnm_getinteger(s, &c); // read max value - - if (maxv > 255) - return stbi__err("max value > 255", "PPM image not 8-bit"); - else - return 1; -} -#endif - -static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) -{ - #ifndef STBI_NO_JPEG - if (stbi__jpeg_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PNG - if (stbi__png_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_GIF - if (stbi__gif_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_BMP - if (stbi__bmp_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PSD - if (stbi__psd_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PIC - if (stbi__pic_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_PNM - if (stbi__pnm_info(s, x, y, comp)) return 1; - #endif - - #ifndef STBI_NO_HDR - if (stbi__hdr_info(s, x, y, comp)) return 1; - #endif - - // test tga last because it's a crappy test! - #ifndef STBI_NO_TGA - if (stbi__tga_info(s, x, y, comp)) - return 1; - #endif - return stbi__err("unknown image type", "Image not of any known type, or corrupt"); -} - -static int stbi__is_16_main(stbi__context *s) -{ - #ifndef STBI_NO_PNG - if (stbi__png_is16(s)) return 1; - #endif - - #ifndef STBI_NO_PSD - if (stbi__psd_is16(s)) return 1; - #endif - - return 0; -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_info_from_file(f, x, y, comp); - fclose(f); - return result; -} - -STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__info_main(&s,x,y,comp); - fseek(f,pos,SEEK_SET); - return r; -} - -STBIDEF int stbi_is_16_bit(char const *filename) -{ - FILE *f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_is_16_bit_from_file(f); - fclose(f); - return result; -} - -STBIDEF int stbi_is_16_bit_from_file(FILE *f) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__is_16_main(&s); - fseek(f,pos,SEEK_SET); - return r; -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__info_main(&s,x,y,comp); -} - -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); - return stbi__info_main(&s,x,y,comp); -} - -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len) -{ - stbi__context s; - stbi__start_mem(&s,buffer,len); - return stbi__is_16_main(&s); -} - -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); - return stbi__is_16_main(&s); -} - -#endif // STB_IMAGE_IMPLEMENTATION - -/* - revision history: - 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug - 1-bit BMP - *_is_16_bit api - avoid warnings - 2.16 (2017-07-23) all functions have 16-bit variants; - STBI_NO_STDIO works again; - compilation fixes; - fix rounding in unpremultiply; - optimize vertical flip; - disable raw_len validation; - documentation fixes - 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; - warning fixes; disable run-time SSE detection on gcc; - uniform handling of optional "return" values; - thread-safe initialization of zlib tables - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) allocate large structures on the stack - remove white matting for transparent PSD - fix reported channel count for PNG & BMP - re-enable SSE2 in non-gcc 64-bit - support RGB-formatted JPEG - read 16-bit PNGs (only as 8-bit) - 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED - 2.09 (2016-01-16) allow comments in PNM files - 16-bit-per-pixel TGA (not bit-per-component) - info() for TGA could break due to .hdr handling - info() for BMP to shares code instead of sloppy parse - can use STBI_REALLOC_SIZED if allocator doesn't support realloc - code cleanup - 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA - 2.07 (2015-09-13) fix compiler warnings - partial animated GIF support - limited 16-bpc PSD support - #ifdef unused functions - bug with < 92 byte PIC,PNM,HDR,TGA - 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value - 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning - 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit - 2.03 (2015-04-12) extra corruption checking (mmozeiko) - stbi_set_flip_vertically_on_load (nguillemot) - fix NEON support; fix mingw support - 2.02 (2015-01-19) fix incorrect assert, fix warning - 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 - 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG - 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) - progressive JPEG (stb) - PGM/PPM support (Ken Miller) - STBI_MALLOC,STBI_REALLOC,STBI_FREE - GIF bugfix -- seemingly never worked - STBI_NO_*, STBI_ONLY_* - 1.48 (2014-12-14) fix incorrectly-named assert() - 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) - optimize PNG (ryg) - fix bug in interlaced PNG with user-specified channel count (stb) - 1.46 (2014-08-26) - fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG - 1.45 (2014-08-16) - fix MSVC-ARM internal compiler error by wrapping malloc - 1.44 (2014-08-07) - various warning fixes from Ronny Chevalier - 1.43 (2014-07-15) - fix MSVC-only compiler problem in code changed in 1.42 - 1.42 (2014-07-09) - don't define _CRT_SECURE_NO_WARNINGS (affects user code) - fixes to stbi__cleanup_jpeg path - added STBI_ASSERT to avoid requiring assert.h - 1.41 (2014-06-25) - fix search&replace from 1.36 that messed up comments/error messages - 1.40 (2014-06-22) - fix gcc struct-initialization warning - 1.39 (2014-06-15) - fix to TGA optimization when req_comp != number of components in TGA; - fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) - add support for BMP version 5 (more ignored fields) - 1.38 (2014-06-06) - suppress MSVC warnings on integer casts truncating values - fix accidental rename of 'skip' field of I/O - 1.37 (2014-06-04) - remove duplicate typedef - 1.36 (2014-06-03) - convert to header file single-file library - if de-iphone isn't set, load iphone images color-swapped instead of returning NULL - 1.35 (2014-05-27) - various warnings - fix broken STBI_SIMD path - fix bug where stbi_load_from_file no longer left file pointer in correct place - fix broken non-easy path for 32-bit BMP (possibly never used) - TGA optimization by Arseny Kapoulkine - 1.34 (unknown) - use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case - 1.33 (2011-07-14) - make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements - 1.32 (2011-07-13) - support for "info" function for all supported filetypes (SpartanJ) - 1.31 (2011-06-20) - a few more leak fixes, bug in PNG handling (SpartanJ) - 1.30 (2011-06-11) - added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) - removed deprecated format-specific test/load functions - removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway - error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) - fix inefficiency in decoding 32-bit BMP (David Woo) - 1.29 (2010-08-16) - various warning fixes from Aurelien Pocheville - 1.28 (2010-08-01) - fix bug in GIF palette transparency (SpartanJ) - 1.27 (2010-08-01) - cast-to-stbi_uc to fix warnings - 1.26 (2010-07-24) - fix bug in file buffering for PNG reported by SpartanJ - 1.25 (2010-07-17) - refix trans_data warning (Won Chun) - 1.24 (2010-07-12) - perf improvements reading from files on platforms with lock-heavy fgetc() - minor perf improvements for jpeg - deprecated type-specific functions so we'll get feedback if they're needed - attempt to fix trans_data warning (Won Chun) - 1.23 fixed bug in iPhone support - 1.22 (2010-07-10) - removed image *writing* support - stbi_info support from Jetro Lauha - GIF support from Jean-Marc Lienher - iPhone PNG-extensions from James Brown - warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) - 1.21 fix use of 'stbi_uc' in header (reported by jon blow) - 1.20 added support for Softimage PIC, by Tom Seddon - 1.19 bug in interlaced PNG corruption check (found by ryg) - 1.18 (2008-08-02) - fix a threading bug (local mutable static) - 1.17 support interlaced PNG - 1.16 major bugfix - stbi__convert_format converted one too many pixels - 1.15 initialize some fields for thread safety - 1.14 fix threadsafe conversion bug - header-file-only version (#define STBI_HEADER_FILE_ONLY before including) - 1.13 threadsafe - 1.12 const qualifiers in the API - 1.11 Support installable IDCT, colorspace conversion routines - 1.10 Fixes for 64-bit (don't use "unsigned long") - optimized upsampling by Fabian "ryg" Giesen - 1.09 Fix format-conversion for PSD code (bad global variables!) - 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz - 1.07 attempt to fix C++ warning/errors again - 1.06 attempt to fix C++ warning/errors again - 1.05 fix TGA loading to return correct *comp and use good luminance calc - 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free - 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR - 1.02 support for (subset of) HDR files, float interface for preferred access to them - 1.01 fix bug: possible bug in handling right-side up bmps... not sure - fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all - 1.00 interface to zlib that skips zlib header - 0.99 correct handling of alpha in palette - 0.98 TGA loader by lonesock; dynamically add loaders (untested) - 0.97 jpeg errors on too large a file; also catch another malloc failure - 0.96 fix detection of invalid v value - particleman@mollyrocket forum - 0.95 during header scan, seek to markers in case of padding - 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same - 0.93 handle jpegtran output; verbose errors - 0.92 read 4,8,16,24,32-bit BMP files of several formats - 0.91 output 24-bit Windows 3.0 BMP files - 0.90 fix a few more warnings; bump version number to approach 1.0 - 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd - 0.60 fix compiling as c++ - 0.59 fix warnings: merge Dave Moore's -Wall fixes - 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian - 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available - 0.56 fix bug: zlib uncompressed mode len vs. nlen - 0.55 fix bug: restart_interval not initialized to 0 - 0.54 allow NULL for 'int *comp' - 0.53 fix bug in png 3->4; speedup png decoding - 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments - 0.51 obey req_comp requests, 1-component jpegs return as 1-component, - on 'test' only check type, not whether we support this variant - 0.50 (2006-11-19) - first released version -*/ - - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ diff --git a/GrafikaProjekt/pliki/textures/B1.png b/GrafikaProjekt/pliki/textures/B1.png deleted file mode 100644 index 637a344..0000000 Binary files a/GrafikaProjekt/pliki/textures/B1.png and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/B1R.png b/GrafikaProjekt/pliki/textures/B1R.png deleted file mode 100644 index 46e0ad1..0000000 Binary files a/GrafikaProjekt/pliki/textures/B1R.png and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/B2.png b/GrafikaProjekt/pliki/textures/B2.png deleted file mode 100644 index 265a64f..0000000 Binary files a/GrafikaProjekt/pliki/textures/B2.png and /dev/null differ diff --git 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a/GrafikaProjekt/pliki/textures/G6R.png and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/a.jpg b/GrafikaProjekt/pliki/textures/a.jpg deleted file mode 100644 index 4ad91eb..0000000 Binary files a/GrafikaProjekt/pliki/textures/a.jpg and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/asteroid.png b/GrafikaProjekt/pliki/textures/asteroid.png new file mode 100644 index 0000000..77ce5d8 Binary files /dev/null and b/GrafikaProjekt/pliki/textures/asteroid.png differ diff --git a/GrafikaProjekt/pliki/textures/cloudy11_low.jpg b/GrafikaProjekt/pliki/textures/cloudy11_low.jpg deleted file mode 100644 index ac83ee3..0000000 Binary files a/GrafikaProjekt/pliki/textures/cloudy11_low.jpg and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/sand.jpg b/GrafikaProjekt/pliki/textures/sand.jpg deleted file mode 100644 index 6c7f60c..0000000 Binary files a/GrafikaProjekt/pliki/textures/sand.jpg and /dev/null differ diff --git a/GrafikaProjekt/pliki/textures/ship_textutre.png b/GrafikaProjekt/pliki/textures/ship_textutre.png deleted file mode 100644 index 41e3a42..0000000 Binary files a/GrafikaProjekt/pliki/textures/ship_textutre.png and /dev/null differ diff --git a/GrafikaProjekt/scena_podwodna.sln b/GrafikaProjekt/scena_podwodna.sln index f036e2d..55cdfcb 100644 --- a/GrafikaProjekt/scena_podwodna.sln +++ b/GrafikaProjekt/scena_podwodna.sln @@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00 # Visual Studio Version 16 VisualStudioVersion = 16.0.31019.35 MinimumVisualStudioVersion = 10.0.40219.1 -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "scena_podwodna", "pliki\projekt.vcxproj", "{DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290}" +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "grk-cw6", "pliki\projekt.vcxproj", "{10701B86-9B0B-46A1-85DA-6238CBCC507B}" EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution @@ -11,10 +11,10 @@ Global Release|x86 = Release|x86 EndGlobalSection GlobalSection(ProjectConfigurationPlatforms) = postSolution - {DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290}.Debug|x86.ActiveCfg = Debug|Win32 - {DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290}.Debug|x86.Build.0 = Debug|Win32 - {DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290}.Release|x86.ActiveCfg = Release|Win32 - {DC3B0EF1-7A30-41B3-9E0D-A1B2E5896290}.Release|x86.Build.0 = Release|Win32 + {10701B86-9B0B-46A1-85DA-6238CBCC507B}.Debug|x86.ActiveCfg = Debug|Win32 + {10701B86-9B0B-46A1-85DA-6238CBCC507B}.Debug|x86.Build.0 = Debug|Win32 + {10701B86-9B0B-46A1-85DA-6238CBCC507B}.Release|x86.ActiveCfg = Release|Win32 + {10701B86-9B0B-46A1-85DA-6238CBCC507B}.Release|x86.Build.0 = Release|Win32 EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE