305 lines
13 KiB
C++
305 lines
13 KiB
C++
/*
|
|
---------------------------------------------------------------------------
|
|
Open Asset Import Library (assimp)
|
|
---------------------------------------------------------------------------
|
|
|
|
Copyright (c) 2006-2011, assimp team
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use of this software in source and binary forms,
|
|
with or without modification, are permitted provided that the following
|
|
conditions are met:
|
|
|
|
* Redistributions of source code must retain the above
|
|
copyright notice, this list of conditions and the
|
|
following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above
|
|
copyright notice, this list of conditions and the
|
|
following disclaimer in the documentation and/or other
|
|
materials provided with the distribution.
|
|
|
|
* Neither the name of the assimp team, nor the names of its
|
|
contributors may be used to endorse or promote products
|
|
derived from this software without specific prior
|
|
written permission of the assimp team.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
---------------------------------------------------------------------------
|
|
*/
|
|
|
|
/** @file export.hpp
|
|
* @brief Defines the CPP-API for the Assimp export interface
|
|
*/
|
|
#ifndef AI_EXPORT_HPP_INC
|
|
#define AI_EXPORT_HPP_INC
|
|
|
|
#ifndef ASSIMP_BUILD_NO_EXPORT
|
|
|
|
#include "cexport.h"
|
|
|
|
namespace Assimp {
|
|
class ExporterPimpl;
|
|
|
|
|
|
// ----------------------------------------------------------------------------------
|
|
/** CPP-API: The Exporter class forms an C++ interface to the export functionality
|
|
* of the Open Asset Import Library. Note that the export interface is available
|
|
* only if Assimp has been built with ASSIMP_BUILD_NO_EXPORT not defined.
|
|
*
|
|
* The interface is modelled after the importer interface and mostly
|
|
* symmetric. The same rules for threading etc. apply.
|
|
*
|
|
* In a nutshell, there are two export interfaces: #Export, which writes the
|
|
* output file(s) either to the regular file system or to a user-supplied
|
|
* #IOSystem, and #ExportToBlob which returns a linked list of memory
|
|
* buffers (blob), each referring to one output file (in most cases
|
|
* there will be only one output file of course, but this extra complexity is
|
|
* needed since Assimp aims at supporting a wide range of file formats).
|
|
*
|
|
* #ExportToBlob is especially useful if you intend to work
|
|
* with the data in-memory.
|
|
*/
|
|
class ASSIMP_API Exporter
|
|
// TODO: causes good ol' base class has no dll interface warning
|
|
//#ifdef __cplusplus
|
|
// : public boost::noncopyable
|
|
//#endif // __cplusplus
|
|
{
|
|
public:
|
|
|
|
/** Function pointer type of a Export worker function */
|
|
typedef void (*fpExportFunc)(const char*,IOSystem*,const aiScene*);
|
|
|
|
/** Internal description of an Assimp export format option */
|
|
struct ExportFormatEntry
|
|
{
|
|
/// Public description structure to be returned by aiGetExportFormatDescription()
|
|
aiExportFormatDesc mDescription;
|
|
|
|
// Worker function to do the actual exporting
|
|
fpExportFunc mExportFunction;
|
|
|
|
// Postprocessing steps to be executed PRIOR to invoking mExportFunction
|
|
unsigned int mEnforcePP;
|
|
|
|
// Constructor to fill all entries
|
|
ExportFormatEntry( const char* pId, const char* pDesc, const char* pExtension, fpExportFunc pFunction, unsigned int pEnforcePP = 0u)
|
|
{
|
|
mDescription.id = pId;
|
|
mDescription.description = pDesc;
|
|
mDescription.fileExtension = pExtension;
|
|
mExportFunction = pFunction;
|
|
mEnforcePP = pEnforcePP;
|
|
}
|
|
|
|
ExportFormatEntry() : mExportFunction(), mEnforcePP() {}
|
|
};
|
|
|
|
|
|
public:
|
|
|
|
|
|
Exporter();
|
|
~Exporter();
|
|
|
|
public:
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Supplies a custom IO handler to the exporter to use to open and
|
|
* access files.
|
|
*
|
|
* If you need #Export to use custom IO logic to access the files,
|
|
* you need to supply a custom implementation of IOSystem and
|
|
* IOFile to the exporter.
|
|
*
|
|
* #Exporter 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, which uses plain file IO.
|
|
*
|
|
* @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;
|
|
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Exports the given scene to a chosen file format. Returns the exported
|
|
* data as a binary blob which you can write into a file or something.
|
|
* When you're done with the data, simply let the #Exporter instance go
|
|
* out of scope to have it released automatically.
|
|
* @param pScene The scene to export. Stays in possession of the caller,
|
|
* is not changed by the function.
|
|
* @param pFormatId ID string to specify to which format you want to
|
|
* export to. Use
|
|
* #GetExportFormatCount / #GetExportFormatDescription to learn which
|
|
* export formats are available.
|
|
* @param pPreprocessing See the documentation for #Export
|
|
* @return the exported data or NULL in case of error.
|
|
* @note If the Exporter instance did already hold a blob from
|
|
* a previous call to #ExportToBlob, it will be disposed.
|
|
* Any IO handlers set via #SetIOHandler are ignored here.*/
|
|
const aiExportDataBlob* ExportToBlob( const aiScene* pScene, const char* pFormatId, unsigned int pPreprocessing = 0u );
|
|
inline const aiExportDataBlob* ExportToBlob( const aiScene* pScene, const std::string& pFormatId, unsigned int pPreprocessing = 0u );
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Convenience function to export directly to a file. Use
|
|
* #SetIOSystem to supply a custom IOSystem to gain fine-grained control
|
|
* about the output data flow of the export process.
|
|
* @param pBlob A data blob obtained from a previous call to #aiExportScene. Must not be NULL.
|
|
* @param pPath Full target file name. Target must be accessible.
|
|
* @param pPreprocessing Accepts any choice of the #aiPostProcessing enumerated
|
|
* flags, but in reality only a subset of them makes sense here. Specifying
|
|
* 'preprocessing' flags is useful if the input scene does not conform to
|
|
* Assimp's default conventions as specified in the @link data Data Structures Page @endlink.
|
|
* In short, this means the geometry data should use a right-handed coordinate systems, face
|
|
* winding should be counter-clockwise and the UV coordinate origin is assumed to be in
|
|
* the upper left. The #aiProcess_MakeLeftHanded, #aiProcess_FlipUVs and
|
|
* #aiProcess_FlipWindingOrder flags are used in the import side to allow users
|
|
* to have those defaults automatically adapted to their conventions. Specifying those flags
|
|
* for exporting has the opposite effect, respectively. Some other of the
|
|
* #aiPostProcessSteps enumerated values may be useful as well, but you'll need
|
|
* to try out what their effect on the exported file is. Many formats impose
|
|
* their own restrictions on the structure of the geometry stored therein,
|
|
* so some preprocessing may have little or no effect at all, or may be
|
|
* redundant as exporters would apply them anyhow. A good example
|
|
* is triangulation - whilst you can enforce it by specifying
|
|
* the #aiProcess_Triangulate flag, most export formats support only
|
|
* triangulate data so they would run the step even if it wasn't requested.
|
|
* @return AI_SUCCESS if everything was fine. */
|
|
aiReturn Export( const aiScene* pScene, const char* pFormatId, const char* pPath, unsigned int pPreprocessing = 0u);
|
|
inline aiReturn Export( const aiScene* pScene, const std::string& pFormatId, const std::string& pPath, unsigned int pPreprocessing = 0u);
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Returns an error description of an error that occurred in #Export
|
|
* or #ExportToBlob
|
|
*
|
|
* 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: #Export, #ExportToBlob, #FreeBlob */
|
|
const char* GetErrorString() const;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Return the blob obtained from the last call to #ExportToBlob */
|
|
const aiExportDataBlob* GetBlob() const;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Orphan the blob from the last call to #ExportToBlob. This means
|
|
* the caller takes ownership and is thus responsible for calling
|
|
* the C API function #aiReleaseExportBlob to release it. */
|
|
const aiExportDataBlob* GetOrphanedBlob() const;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Frees the current blob.
|
|
*
|
|
* The function does nothing if no blob has previously been
|
|
* previously produced via #ExportToBlob. #FreeBlob is called
|
|
* automatically by the destructor. The only reason to call
|
|
* it manually would be to reclain as much storage as possible
|
|
* without giving up the #Exporter instance yet. */
|
|
void FreeBlob( );
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Returns the number of export file formats available in the current
|
|
* Assimp build. Use #Exporter::GetExportFormatDescription to
|
|
* retrieve infos of a specific export format */
|
|
size_t GetExportFormatCount() const;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Returns a description of the nth export file format. Use #
|
|
* #Exporter::GetExportFormatCount to learn how many export
|
|
* formats are supported.
|
|
* @param pIndex Index of the export format to retrieve information
|
|
* for. Valid range is 0 to #Exporter::GetExportFormatCount
|
|
* @return A description of that specific export format.
|
|
* NULL if pIndex is out of range. */
|
|
const aiExportFormatDesc* GetExportFormatDescription( size_t pIndex ) const;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Register a custom exporter. Custom export formats are limited to
|
|
* to the current #Exporter instance and do not affect the
|
|
* library globally.
|
|
* @param desc Exporter description.
|
|
* @return aiReturn_SUCCESS if the export format was successfully
|
|
* registered. A common cause that would prevent an exporter
|
|
* from being registered is that its format id is already
|
|
* occupied by another format. */
|
|
aiReturn RegisterExporter(const ExportFormatEntry& desc);
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
/** Remove an export format previously registered with #RegisterExporter
|
|
* from the #Exporter instance (this can also be used to drop
|
|
* builtin exporters because those are implicitly registered
|
|
* using #RegisterExporter).
|
|
* @param id Format id to be unregistered, this refers to the
|
|
* 'id' field of #aiExportFormatDesc.
|
|
* @note Calling this method on a format description not yet registered
|
|
* has no effect.*/
|
|
void UnregisterExporter(const char* id);
|
|
|
|
|
|
protected:
|
|
|
|
// Just because we don't want you to know how we're hacking around.
|
|
ExporterPimpl* pimpl;
|
|
};
|
|
|
|
|
|
// ----------------------------------------------------------------------------------
|
|
inline const aiExportDataBlob* Exporter :: ExportToBlob( const aiScene* pScene, const std::string& pFormatId,unsigned int pPreprocessing )
|
|
{
|
|
return ExportToBlob(pScene,pFormatId.c_str(),pPreprocessing);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------------
|
|
inline aiReturn Exporter :: Export( const aiScene* pScene, const std::string& pFormatId, const std::string& pPath, unsigned int pPreprocessing )
|
|
{
|
|
return Export(pScene,pFormatId.c_str(),pPath.c_str(),pPreprocessing);
|
|
}
|
|
|
|
} // namespace Assimp
|
|
#endif // ASSIMP_BUILD_NO_EXPORT
|
|
#endif // AI_EXPORT_HPP_INC
|
|
|