Space-Project/shaders/shader_blur.frag
2021-01-29 02:03:00 +01:00

32 lines
986 B
GLSL

#version 430 core
out vec4 FragColor;
in vec2 vTexCoords;
uniform sampler2D image;
uniform bool horizontal;
uniform float weight[5] = float[] (0.2270270270, 0.1945945946, 0.1216216216, 0.0540540541, 0.0162162162);
void main()
{
vec2 tex_offset = 1.0 / textureSize(image, 0); // gets size of single texel
vec3 result = texture(image, vTexCoords).rgb * weight[0];
if(horizontal)
{
for(int i = 1; i < 5; ++i)
{
result += texture(image, vTexCoords + vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
result += texture(image, vTexCoords - vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
}
}
else
{
for(int i = 1; i < 5; ++i)
{
result += texture(image, vTexCoords + vec2(0.0, tex_offset.y * i)).rgb * weight[i];
result += texture(image, vTexCoords - vec2(0.0, tex_offset.y * i)).rgb * weight[i];
}
}
FragColor = vec4(result, 1.0);
}