263 lines
12 KiB
C++
263 lines
12 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 cexport.h
|
|
* @brief Defines the C-API for the Assimp export interface
|
|
*/
|
|
#ifndef AI_EXPORT_H_INC
|
|
#define AI_EXPORT_H_INC
|
|
|
|
#ifndef ASSIMP_BUILD_NO_EXPORT
|
|
|
|
#include "types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct aiScene; // aiScene.h
|
|
struct aiFileIO; // aiFileIO.h
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Describes an file format which Assimp can export to. Use #aiGetExportFormatCount() to
|
|
* learn how many export formats the current Assimp build supports and #aiGetExportFormatDescription()
|
|
* to retrieve a description of an export format option.
|
|
*/
|
|
struct aiExportFormatDesc
|
|
{
|
|
/// a short string ID to uniquely identify the export format. Use this ID string to
|
|
/// specify which file format you want to export to when calling #aiExportScene().
|
|
/// Example: "dae" or "obj"
|
|
const char* id;
|
|
|
|
/// A short description of the file format to present to users. Useful if you want
|
|
/// to allow the user to select an export format.
|
|
const char* description;
|
|
|
|
/// Recommended file extension for the exported file in lower case.
|
|
const char* fileExtension;
|
|
};
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Returns the number of export file formats available in the current Assimp build.
|
|
* Use aiGetExportFormatDescription() to retrieve infos of a specific export format.
|
|
*/
|
|
ASSIMP_API size_t aiGetExportFormatCount(void);
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Returns a description of the nth export file format. Use #aiGetExportFormatCount()
|
|
* to learn how many export formats are supported. The description must be released by
|
|
* calling aiReleaseExportFormatDescription afterwards.
|
|
* @param pIndex Index of the export format to retrieve information for. Valid range is
|
|
* 0 to #aiGetExportFormatCount()
|
|
* @return A description of that specific export format. NULL if pIndex is out of range.
|
|
*/
|
|
ASSIMP_API const C_STRUCT aiExportFormatDesc* aiGetExportFormatDescription( size_t pIndex);
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Release a description of the nth export file format. Must be returned by
|
|
* aiGetExportFormatDescription
|
|
* @param desc Pointer to the description
|
|
*/
|
|
ASSIMP_API void aiReleaseExportFormatDescription( const C_STRUCT aiExportFormatDesc *desc );
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Create a modifiable copy of a scene.
|
|
* This is useful to import files via Assimp, change their topology and
|
|
* export them again. Since the scene returned by the various importer functions
|
|
* is const, a modifiable copy is needed.
|
|
* @param pIn Valid scene to be copied
|
|
* @param pOut Receives a modifyable copy of the scene. Use aiFreeScene() to
|
|
* delete it again.
|
|
*/
|
|
ASSIMP_API void aiCopyScene(const C_STRUCT aiScene* pIn,
|
|
C_STRUCT aiScene** pOut);
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Frees a scene copy created using aiCopyScene() */
|
|
ASSIMP_API void aiFreeScene(const C_STRUCT aiScene* pIn);
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Exports the given scene to a chosen file format and writes the result file(s) to disk.
|
|
* @param pScene The scene to export. Stays in possession of the caller, is not changed by the function.
|
|
* The scene is expected to conform to Assimp's Importer output format as specified
|
|
* in the @link data Data Structures Page @endlink. In short, this means the model 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. If your input data
|
|
* uses different conventions, have a look at the last parameter.
|
|
* @param pFormatId ID string to specify to which format you want to export to. Use
|
|
* aiGetExportFormatCount() / aiGetExportFormatDescription() to learn which export formats are available.
|
|
* @param pFileName Output file to write
|
|
* @param pPreprocessing Accepts any choice of the #aiPostProcessSteps 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 anyway.
|
|
*
|
|
* If assimp detects that the input scene was directly taken from the importer side of
|
|
* the library (i.e. not copied using aiCopyScene and potetially modified afterwards),
|
|
* any postprocessing steps already applied to the scene will not be applied again, unless
|
|
* they show non-idempotent behaviour (#aiProcess_MakeLeftHanded, #aiProcess_FlipUVs and
|
|
* #aiProcess_FlipWindingOrder).
|
|
* @return a status code indicating the result of the export
|
|
* @note Use aiCopyScene() to get a modifiable copy of a previously
|
|
* imported scene.
|
|
*/
|
|
ASSIMP_API aiReturn aiExportScene( const C_STRUCT aiScene* pScene,
|
|
const char* pFormatId,
|
|
const char* pFileName,
|
|
unsigned int pPreprocessing);
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Exports the given scene to a chosen file format using custom IO logic supplied by you.
|
|
* @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
|
|
* aiGetExportFormatCount() / aiGetExportFormatDescription() to learn which export formats are available.
|
|
* @param pFileName Output file to write
|
|
* @param pIO custom IO implementation to be used. Use this if you use your own storage methods.
|
|
* If none is supplied, a default implementation using standard file IO is used. Note that
|
|
* #aiExportSceneToBlob is provided as convenience function to export to memory buffers.
|
|
* @param pPreprocessing Please see the documentation for #aiExportScene
|
|
* @return a status code indicating the result of the export
|
|
* @note Include <aiFileIO.h> for the definition of #aiFileIO.
|
|
* @note Use aiCopyScene() to get a modifiable copy of a previously
|
|
* imported scene.
|
|
*/
|
|
ASSIMP_API aiReturn aiExportSceneEx( const C_STRUCT aiScene* pScene,
|
|
const char* pFormatId,
|
|
const char* pFileName,
|
|
C_STRUCT aiFileIO* pIO,
|
|
unsigned int pPreprocessing );
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Describes a blob of exported scene data. Use #aiExportSceneToBlob() to create a blob containing an
|
|
* exported scene. The memory referred by this structure is owned by Assimp.
|
|
* to free its resources. Don't try to free the memory on your side - it will crash for most build configurations
|
|
* due to conflicting heaps.
|
|
*
|
|
* Blobs can be nested - each blob may reference another blob, which may in turn reference another blob and so on.
|
|
* This is used when exporters write more than one output file for a given #aiScene. See the remarks for
|
|
* #aiExportDataBlob::name for more information.
|
|
*/
|
|
struct aiExportDataBlob
|
|
{
|
|
/// Size of the data in bytes
|
|
size_t size;
|
|
|
|
/// The data.
|
|
void* data;
|
|
|
|
/** Name of the blob. An empty string always
|
|
indicates the first (and primary) blob,
|
|
which contains the actual file data.
|
|
Any other blobs are auxiliary files produced
|
|
by exporters (i.e. material files). Existence
|
|
of such files depends on the file format. Most
|
|
formats don't split assets across multiple files.
|
|
|
|
If used, blob names usually contain the file
|
|
extension that should be used when writing
|
|
the data to disc.
|
|
*/
|
|
C_STRUCT aiString name;
|
|
|
|
/** Pointer to the next blob in the chain or NULL if there is none. */
|
|
C_STRUCT aiExportDataBlob * next;
|
|
|
|
#ifdef __cplusplus
|
|
/// Default constructor
|
|
aiExportDataBlob() { size = 0; data = next = NULL; }
|
|
/// Releases the data
|
|
~aiExportDataBlob() { delete [] static_cast<unsigned char*>( data ); delete next; }
|
|
|
|
private:
|
|
// no copying
|
|
aiExportDataBlob(const aiExportDataBlob& );
|
|
aiExportDataBlob& operator= (const aiExportDataBlob& );
|
|
#endif // __cplusplus
|
|
};
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** 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, use #aiReleaseExportBlob()
|
|
* to free the resources associated with the export.
|
|
* @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
|
|
* #aiGetExportFormatCount() / #aiGetExportFormatDescription() to learn which export formats are available.
|
|
* @param pPreprocessing Please see the documentation for #aiExportScene
|
|
* @return the exported data or NULL in case of error
|
|
*/
|
|
ASSIMP_API const C_STRUCT aiExportDataBlob* aiExportSceneToBlob( const C_STRUCT aiScene* pScene, const char* pFormatId, unsigned int pPreprocessing );
|
|
|
|
|
|
// --------------------------------------------------------------------------------
|
|
/** Releases the memory associated with the given exported data. Use this function to free a data blob
|
|
* returned by aiExportScene().
|
|
* @param pData the data blob returned by #aiExportSceneToBlob
|
|
*/
|
|
ASSIMP_API void aiReleaseExportBlob( const C_STRUCT aiExportDataBlob* pData );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // ASSIMP_BUILD_NO_EXPORT
|
|
#endif // AI_EXPORT_H_INC
|
|
|