Space-Project/dependencies/assimp/include/assimp/Importer.hpp
2021-01-16 17:11:39 +01:00

660 lines
30 KiB
C++

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2019, assimp team
All rights reserved.
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* Redistributions in binary form must reproduce the above
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*/
/** @file Importer.hpp
* @brief Defines the C++-API to the Open Asset Import Library.
*/
#pragma once
#ifndef AI_ASSIMP_HPP_INC
#define AI_ASSIMP_HPP_INC
#ifndef __cplusplus
# error This header requires C++ to be used. Use assimp.h for plain C.
#endif // __cplusplus
// Public ASSIMP data structures
#include <assimp/types.h>
namespace Assimp {
// =======================================================================
// Public interface to Assimp
class Importer;
class IOStream;
class IOSystem;
class ProgressHandler;
// =======================================================================
// Plugin development
//
// Include the following headers for the declarations:
// BaseImporter.h
// BaseProcess.h
class BaseImporter;
class BaseProcess;
class SharedPostProcessInfo;
class BatchLoader;
// =======================================================================
// Holy stuff, only for members of the high council of the Jedi.
class ImporterPimpl;
} //! namespace Assimp
#define AI_PROPERTY_WAS_NOT_EXISTING 0xffffffff
struct aiScene;
// importerdesc.h
struct aiImporterDesc;
/** @namespace Assimp Assimp's CPP-API and all internal APIs */
namespace Assimp {
// ----------------------------------------------------------------------------------
/** CPP-API: The Importer class forms an C++ interface to the functionality of the
* Open Asset Import Library.
*
* Create an object of this class and call ReadFile() to import a file.
* If the import succeeds, the function returns a pointer to the imported data.
* The data remains property of the object, it is intended to be accessed
* read-only. The imported data will be destroyed along with the Importer
* object. If the import fails, ReadFile() returns a NULL pointer. In this
* case you can retrieve a human-readable error description be calling
* GetErrorString(). You can call ReadFile() multiple times with a single Importer
* instance. Actually, constructing Importer objects involves quite many
* allocations and may take some time, so it's better to reuse them as often as
* possible.
*
* If you need the Importer to do custom file handling to access the files,
* implement IOSystem and IOStream and supply an instance of your custom
* IOSystem implementation by calling SetIOHandler() before calling ReadFile().
* If you do not assign a custion IO handler, a default handler using the
* standard C++ IO logic will be used.
*
* @note One Importer instance is not thread-safe. If you use multiple
* threads for loading, each thread should maintain its own Importer instance.
*/
class ASSIMP_API Importer {
public:
/**
* @brief The upper limit for hints.
*/
static const unsigned int MaxLenHint = 200;
public:
// -------------------------------------------------------------------
/** Constructor. Creates an empty importer object.
*
* Call ReadFile() to start the import process. The configuration
* property table is initially empty.
*/
Importer();
// -------------------------------------------------------------------
/** Copy constructor.
*
* This copies the configuration properties of another Importer.
* If this Importer owns a scene it won't be copied.
* Call ReadFile() to start the import process.
*/
Importer(const Importer& other)=delete;
// -------------------------------------------------------------------
/** Assignment operator has been deleted
*/
Importer &operator=(const Importer &) = delete;
// -------------------------------------------------------------------
/** Destructor. The object kept ownership of the imported data,
* which now will be destroyed along with the object.
*/
~Importer();
// -------------------------------------------------------------------
/** Registers a new loader.
*
* @param pImp Importer to be added. The Importer instance takes
* ownership of the pointer, so it will be automatically deleted
* with the Importer instance.
* @return AI_SUCCESS if the loader has been added. The registration
* fails if there is already a loader for a specific file extension.
*/
aiReturn RegisterLoader(BaseImporter* pImp);
// -------------------------------------------------------------------
/** Unregisters a loader.
*
* @param pImp Importer to be unregistered.
* @return AI_SUCCESS if the loader has been removed. The function
* fails if the loader is currently in use (this could happen
* if the #Importer instance is used by more than one thread) or
* if it has not yet been registered.
*/
aiReturn UnregisterLoader(BaseImporter* pImp);
// -------------------------------------------------------------------
/** Registers a new post-process step.
*
* At the moment, there's a small limitation: new post processing
* steps are added to end of the list, or in other words, executed
* last, after all built-in steps.
* @param pImp Post-process step to be added. The Importer instance
* takes ownership of the pointer, so it will be automatically
* deleted with the Importer instance.
* @return AI_SUCCESS if the step has been added correctly.
*/
aiReturn RegisterPPStep(BaseProcess* pImp);
// -------------------------------------------------------------------
/** Unregisters a post-process step.
*
* @param pImp Step to be unregistered.
* @return AI_SUCCESS if the step has been removed. The function
* fails if the step is currently in use (this could happen
* if the #Importer instance is used by more than one thread) or
* if it has not yet been registered.
*/
aiReturn UnregisterPPStep(BaseProcess* pImp);
// -------------------------------------------------------------------
/** Set an integer configuration property.
* @param szName Name of the property. All supported properties
* are defined in the aiConfig.g header (all constants share the
* prefix AI_CONFIG_XXX and are simple strings).
* @param iValue New value of the property
* @return true if the property was set before. The new value replaces
* the previous value in this case.
* @note Property of different types (float, int, string ..) are kept
* on different stacks, so calling SetPropertyInteger() for a
* floating-point property has no effect - the loader will call
* GetPropertyFloat() to read the property, but it won't be there.
*/
bool SetPropertyInteger(const char* szName, int iValue);
// -------------------------------------------------------------------
/** Set a boolean configuration property. Boolean properties
* are stored on the integer stack internally so it's possible
* to set them via #SetPropertyBool and query them with
* #GetPropertyBool and vice versa.
* @see SetPropertyInteger()
*/
bool SetPropertyBool(const char* szName, bool value) {
return SetPropertyInteger(szName,value);
}
// -------------------------------------------------------------------
/** Set a floating-point configuration property.
* @see SetPropertyInteger()
*/
bool SetPropertyFloat(const char* szName, ai_real fValue);
// -------------------------------------------------------------------
/** Set a string configuration property.
* @see SetPropertyInteger()
*/
bool SetPropertyString(const char* szName, const std::string& sValue);
// -------------------------------------------------------------------
/** Set a matrix configuration property.
* @see SetPropertyInteger()
*/
bool SetPropertyMatrix(const char* szName, const aiMatrix4x4& sValue);
// -------------------------------------------------------------------
/** Get a configuration property.
* @param szName Name of the property. All supported properties
* are defined in the aiConfig.g header (all constants share the
* prefix AI_CONFIG_XXX).
* @param iErrorReturn Value that is returned if the property
* is not found.
* @return Current value of the property
* @note Property of different types (float, int, string ..) are kept
* on different lists, so calling SetPropertyInteger() for a
* floating-point property has no effect - the loader will call
* GetPropertyFloat() to read the property, but it won't be there.
*/
int GetPropertyInteger(const char* szName,
int iErrorReturn = 0xffffffff) const;
// -------------------------------------------------------------------
/** Get a boolean configuration property. Boolean properties
* are stored on the integer stack internally so it's possible
* to set them via #SetPropertyBool and query them with
* #GetPropertyBool and vice versa.
* @see GetPropertyInteger()
*/
bool GetPropertyBool(const char* szName, bool bErrorReturn = false) const {
return GetPropertyInteger(szName,bErrorReturn)!=0;
}
// -------------------------------------------------------------------
/** Get a floating-point configuration property
* @see GetPropertyInteger()
*/
ai_real GetPropertyFloat(const char* szName,
ai_real fErrorReturn = 10e10) const;
// -------------------------------------------------------------------
/** Get a string configuration property
*
* The return value remains valid until the property is modified.
* @see GetPropertyInteger()
*/
const std::string GetPropertyString(const char* szName,
const std::string& sErrorReturn = "") const;
// -------------------------------------------------------------------
/** Get a matrix configuration property
*
* The return value remains valid until the property is modified.
* @see GetPropertyInteger()
*/
const aiMatrix4x4 GetPropertyMatrix(const char* szName,
const aiMatrix4x4& sErrorReturn = aiMatrix4x4()) const;
// -------------------------------------------------------------------
/** Supplies a custom IO handler to the importer to use to open and
* access files. If you need the importer to use custom IO logic to
* access the files, you need to provide a custom implementation of
* IOSystem and IOFile to the importer. Then create an instance of
* your custom IOSystem implementation and supply it by this function.
*
* The Importer takes ownership of the object and will destroy it
* afterwards. The previously assigned handler will be deleted.
* Pass NULL to take again ownership of your IOSystem and reset Assimp
* to use its default implementation.
*
* @param pIOHandler The IO handler to be used in all file accesses
* of the Importer.
*/
void SetIOHandler( IOSystem* pIOHandler);
// -------------------------------------------------------------------
/** Retrieves the IO handler that is currently set.
* You can use #IsDefaultIOHandler() to check whether the returned
* interface is the default IO handler provided by ASSIMP. The default
* handler is active as long the application doesn't supply its own
* custom IO handler via #SetIOHandler().
* @return A valid IOSystem interface, never NULL.
*/
IOSystem* GetIOHandler() const;
// -------------------------------------------------------------------
/** Checks whether a default IO handler is active
* A default handler is active as long the application doesn't
* supply its own custom IO handler via #SetIOHandler().
* @return true by default
*/
bool IsDefaultIOHandler() const;
// -------------------------------------------------------------------
/** Supplies a custom progress handler to the importer. This
* interface exposes an #Update() callback, which is called
* more or less periodically (please don't sue us if it
* isn't as periodically as you'd like it to have ...).
* This can be used to implement progress bars and loading
* timeouts.
* @param pHandler Progress callback interface. Pass NULL to
* disable progress reporting.
* @note Progress handlers can be used to abort the loading
* at almost any time.*/
void SetProgressHandler ( ProgressHandler* pHandler );
// -------------------------------------------------------------------
/** Retrieves the progress handler that is currently set.
* You can use #IsDefaultProgressHandler() to check whether the returned
* interface is the default handler provided by ASSIMP. The default
* handler is active as long the application doesn't supply its own
* custom handler via #SetProgressHandler().
* @return A valid ProgressHandler interface, never NULL.
*/
ProgressHandler* GetProgressHandler() const;
// -------------------------------------------------------------------
/** Checks whether a default progress handler is active
* A default handler is active as long the application doesn't
* supply its own custom progress handler via #SetProgressHandler().
* @return true by default
*/
bool IsDefaultProgressHandler() const;
// -------------------------------------------------------------------
/** @brief Check whether a given set of post-processing flags
* is supported.
*
* Some flags are mutually exclusive, others are probably
* not available because your excluded them from your
* Assimp builds. Calling this function is recommended if
* you're unsure.
*
* @param pFlags Bitwise combination of the aiPostProcess flags.
* @return true if this flag combination is fine.
*/
bool ValidateFlags(unsigned int pFlags) const;
// -------------------------------------------------------------------
/** Reads the given file and returns its contents if successful.
*
* If the call succeeds, the contents of the file are returned as a
* pointer to an aiScene object. The returned data is intended to be
* read-only, the importer object keeps ownership of the data and will
* destroy it upon destruction. If the import fails, NULL is returned.
* A human-readable error description can be retrieved by calling
* GetErrorString(). The previous scene will be deleted during this call.
* @param pFile Path and filename to the file to be imported.
* @param pFlags Optional post processing steps to be executed after
* a successful import. Provide a bitwise combination of the
* #aiPostProcessSteps flags. If you wish to inspect the imported
* scene first in order to fine-tune your post-processing setup,
* consider to use #ApplyPostProcessing().
* @return A pointer to the imported data, NULL if the import failed.
* The pointer to the scene remains in possession of the Importer
* instance. Use GetOrphanedScene() to take ownership of it.
*
* @note Assimp is able to determine the file format of a file
* automatically.
*/
const aiScene* ReadFile(
const char* pFile,
unsigned int pFlags);
// -------------------------------------------------------------------
/** Reads the given file from a memory buffer and returns its
* contents if successful.
*
* If the call succeeds, the contents of the file are returned as a
* pointer to an aiScene object. The returned data is intended to be
* read-only, the importer object keeps ownership of the data and will
* destroy it upon destruction. If the import fails, NULL is returned.
* A human-readable error description can be retrieved by calling
* GetErrorString(). The previous scene will be deleted during this call.
* Calling this method doesn't affect the active IOSystem.
* @param pBuffer Pointer to the file data
* @param pLength Length of pBuffer, in bytes
* @param pFlags Optional post processing steps to be executed after
* a successful import. Provide a bitwise combination of the
* #aiPostProcessSteps flags. If you wish to inspect the imported
* scene first in order to fine-tune your post-processing setup,
* consider to use #ApplyPostProcessing().
* @param pHint An additional hint to the library. If this is a non
* empty string, the library looks for a loader to support
* the file extension specified by pHint and passes the file to
* the first matching loader. If this loader is unable to completely
* the request, the library continues and tries to determine the
* file format on its own, a task that may or may not be successful.
* Check the return value, and you'll know ...
* @return A pointer to the imported data, NULL if the import failed.
* The pointer to the scene remains in possession of the Importer
* instance. Use GetOrphanedScene() to take ownership of it.
*
* @note This is a straightforward way to decode models from memory
* buffers, but it doesn't handle model formats that spread their
* data across multiple files or even directories. Examples include
* OBJ or MD3, which outsource parts of their material info into
* external scripts. If you need full functionality, provide
* a custom IOSystem to make Assimp find these files and use
* the regular ReadFile() API.
*/
const aiScene* ReadFileFromMemory(
const void* pBuffer,
size_t pLength,
unsigned int pFlags,
const char* pHint = "");
// -------------------------------------------------------------------
/** Apply post-processing to an already-imported scene.
*
* This is strictly equivalent to calling #ReadFile() with the same
* flags. However, you can use this separate function to inspect
* the imported scene first to fine-tune your post-processing setup.
* @param pFlags Provide a bitwise combination of the
* #aiPostProcessSteps flags.
* @return A pointer to the post-processed data. This is still the
* same as the pointer returned by #ReadFile(). However, if
* post-processing fails, the scene could now be NULL.
* That's quite a rare case, post processing steps are not really
* designed to 'fail'. To be exact, the #aiProcess_ValidateDS
* flag is currently the only post processing step which can actually
* cause the scene to be reset to NULL.
*
* @note The method does nothing if no scene is currently bound
* to the #Importer instance. */
const aiScene* ApplyPostProcessing(unsigned int pFlags);
const aiScene* ApplyCustomizedPostProcessing( BaseProcess *rootProcess, bool requestValidation );
// -------------------------------------------------------------------
/** @brief Reads the given file and returns its contents if successful.
*
* This function is provided for backward compatibility.
* See the const char* version for detailed docs.
* @see ReadFile(const char*, pFlags) */
const aiScene* ReadFile(
const std::string& pFile,
unsigned int pFlags);
// -------------------------------------------------------------------
/** Frees the current scene.
*
* The function does nothing if no scene has previously been
* read via ReadFile(). FreeScene() is called automatically by the
* destructor and ReadFile() itself. */
void FreeScene( );
// -------------------------------------------------------------------
/** Returns an error description of an error that occurred in ReadFile().
*
* Returns an empty string if no error occurred.
* @return A description of the last error, an empty string if no
* error occurred. The string is never NULL.
*
* @note The returned function remains valid until one of the
* following methods is called: #ReadFile(), #FreeScene(). */
const char* GetErrorString() const;
// -------------------------------------------------------------------
/** Returns the scene loaded by the last successful call to ReadFile()
*
* @return Current scene or NULL if there is currently no scene loaded */
const aiScene* GetScene() const;
// -------------------------------------------------------------------
/** Returns the scene loaded by the last successful call to ReadFile()
* and releases the scene from the ownership of the Importer
* instance. The application is now responsible for deleting the
* scene. Any further calls to GetScene() or GetOrphanedScene()
* will return NULL - until a new scene has been loaded via ReadFile().
*
* @return Current scene or NULL if there is currently no scene loaded
* @note Use this method with maximal caution, and only if you have to.
* By design, aiScene's are exclusively maintained, allocated and
* deallocated by Assimp and no one else. The reasoning behind this
* is the golden rule that deallocations should always be done
* by the module that did the original allocation because heaps
* are not necessarily shared. GetOrphanedScene() enforces you
* to delete the returned scene by yourself, but this will only
* be fine if and only if you're using the same heap as assimp.
* On Windows, it's typically fine provided everything is linked
* against the multithreaded-dll version of the runtime library.
* It will work as well for static linkage with Assimp.*/
aiScene* GetOrphanedScene();
// -------------------------------------------------------------------
/** Returns whether a given file extension is supported by ASSIMP.
*
* @param szExtension Extension to be checked.
* Must include a trailing dot '.'. Example: ".3ds", ".md3".
* Cases-insensitive.
* @return true if the extension is supported, false otherwise */
bool IsExtensionSupported(const char* szExtension) const;
// -------------------------------------------------------------------
/** @brief Returns whether a given file extension is supported by ASSIMP.
*
* This function is provided for backward compatibility.
* See the const char* version for detailed and up-to-date docs.
* @see IsExtensionSupported(const char*) */
inline bool IsExtensionSupported(const std::string& szExtension) const;
// -------------------------------------------------------------------
/** Get a full list of all file extensions supported by ASSIMP.
*
* If a file extension is contained in the list this does of course not
* mean that ASSIMP is able to load all files with this extension ---
* it simply means there is an importer loaded which claims to handle
* files with this file extension.
* @param szOut String to receive the extension list.
* Format of the list: "*.3ds;*.obj;*.dae". This is useful for
* use with the WinAPI call GetOpenFileName(Ex). */
void GetExtensionList(aiString& szOut) const;
// -------------------------------------------------------------------
/** @brief Get a full list of all file extensions supported by ASSIMP.
*
* This function is provided for backward compatibility.
* See the aiString version for detailed and up-to-date docs.
* @see GetExtensionList(aiString&)*/
inline void GetExtensionList(std::string& szOut) const;
// -------------------------------------------------------------------
/** Get the number of importers currently registered with Assimp. */
size_t GetImporterCount() const;
// -------------------------------------------------------------------
/** Get meta data for the importer corresponding to a specific index..
*
* For the declaration of #aiImporterDesc, include <assimp/importerdesc.h>.
* @param index Index to query, must be within [0,GetImporterCount())
* @return Importer meta data structure, NULL if the index does not
* exist or if the importer doesn't offer meta information (
* importers may do this at the cost of being hated by their peers).*/
const aiImporterDesc* GetImporterInfo(size_t index) const;
// -------------------------------------------------------------------
/** Find the importer corresponding to a specific index.
*
* @param index Index to query, must be within [0,GetImporterCount())
* @return Importer instance. NULL if the index does not
* exist. */
BaseImporter* GetImporter(size_t index) const;
// -------------------------------------------------------------------
/** Find the importer corresponding to a specific file extension.
*
* This is quite similar to #IsExtensionSupported except a
* BaseImporter instance is returned.
* @param szExtension Extension to check for. The following formats
* are recognized (BAH being the file extension): "BAH" (comparison
* is case-insensitive), ".bah", "*.bah" (wild card and dot
* characters at the beginning of the extension are skipped).
* @return NULL if no importer is found*/
BaseImporter* GetImporter (const char* szExtension) const;
// -------------------------------------------------------------------
/** Find the importer index corresponding to a specific file extension.
*
* @param szExtension Extension to check for. The following formats
* are recognized (BAH being the file extension): "BAH" (comparison
* is case-insensitive), ".bah", "*.bah" (wild card and dot
* characters at the beginning of the extension are skipped).
* @return (size_t)-1 if no importer is found */
size_t GetImporterIndex (const char* szExtension) const;
// -------------------------------------------------------------------
/** Returns the storage allocated by ASSIMP to hold the scene data
* in memory.
*
* This refers to the currently loaded file, see #ReadFile().
* @param in Data structure to be filled.
* @note The returned memory statistics refer to the actual
* size of the use data of the aiScene. Heap-related overhead
* is (naturally) not included.*/
void GetMemoryRequirements(aiMemoryInfo& in) const;
// -------------------------------------------------------------------
/** Enables "extra verbose" mode.
*
* 'Extra verbose' means the data structure is validated after *every*
* single post processing step to make sure everyone modifies the data
* structure in a well-defined manner. This is a debug feature and not
* intended for use in production environments. */
void SetExtraVerbose(bool bDo);
// -------------------------------------------------------------------
/** Private, do not use. */
ImporterPimpl* Pimpl() { return pimpl; }
const ImporterPimpl* Pimpl() const { return pimpl; }
protected:
// Just because we don't want you to know how we're hacking around.
ImporterPimpl* pimpl;
}; //! class Importer
// ----------------------------------------------------------------------------
// For compatibility, the interface of some functions taking a std::string was
// changed to const char* to avoid crashes between binary incompatible STL
// versions. This code her is inlined, so it shouldn't cause any problems.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
AI_FORCE_INLINE const aiScene* Importer::ReadFile( const std::string& pFile,unsigned int pFlags){
return ReadFile(pFile.c_str(),pFlags);
}
// ----------------------------------------------------------------------------
AI_FORCE_INLINE void Importer::GetExtensionList(std::string& szOut) const {
aiString s;
GetExtensionList(s);
szOut = s.data;
}
// ----------------------------------------------------------------------------
AI_FORCE_INLINE bool Importer::IsExtensionSupported(const std::string& szExtension) const {
return IsExtensionSupported(szExtension.c_str());
}
} // !namespace Assimp
#endif // AI_ASSIMP_HPP_INC