414 lines
13 KiB
C++
414 lines
13 KiB
C++
/*
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---------------------------------------------------------------------------
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Open Asset Import Library (assimp)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2012, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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/** @file Exporter.cpp
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Assimp export interface. While it's public interface bears many similarities
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to the import interface (in fact, it is largely symmetric), the internal
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implementations differs a lot. Exporters are considered stateless and are
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simple callbacks which we maintain in a global list along with their
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description strings.
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Here we implement only the C++ interface (Assimp::Exporter).
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*/
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#include "AssimpPCH.h"
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#ifndef ASSIMP_BUILD_NO_EXPORT
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#include "DefaultIOSystem.h"
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#include "BlobIOSystem.h"
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#include "SceneCombiner.h"
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#include "BaseProcess.h"
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#include "Importer.h" // need this for GetPostProcessingStepInstanceList()
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#include "MakeVerboseFormat.h"
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#include "ConvertToLHProcess.h"
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namespace Assimp {
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// PostStepRegistry.cpp
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void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out);
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// ------------------------------------------------------------------------------------------------
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// Exporter worker function prototypes. Should not be necessary to #ifndef them, it's just a prototype
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void ExportSceneCollada(const char*,IOSystem*, const aiScene*);
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void ExportSceneObj(const char*,IOSystem*, const aiScene*);
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void ExportSceneSTL(const char*,IOSystem*, const aiScene*);
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void ExportScenePly(const char*,IOSystem*, const aiScene*);
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void ExportScene3DS(const char*, IOSystem*, const aiScene*) {}
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// ------------------------------------------------------------------------------------------------
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// global array of all export formats which Assimp supports in its current build
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Exporter::ExportFormatEntry gExporters[] =
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{
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#ifndef ASSIMP_BUILD_NO_COLLADA_EXPORTER
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Exporter::ExportFormatEntry( "collada", "COLLADA - Digital Asset Exchange Schema", "dae", &ExportSceneCollada),
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#endif
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#ifndef ASSIMP_BUILD_NO_OBJ_EXPORTER
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Exporter::ExportFormatEntry( "obj", "Wavefront OBJ format", "obj", &ExportSceneObj),
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#endif
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#ifndef ASSIMP_BUILD_NO_STL_EXPORTER
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Exporter::ExportFormatEntry( "stl", "Stereolithography", "stl" , &ExportSceneSTL,
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aiProcess_Triangulate | aiProcess_GenNormals | aiProcess_PreTransformVertices
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),
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#endif
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#ifndef ASSIMP_BUILD_NO_PLY_EXPORTER
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Exporter::ExportFormatEntry( "ply", "Stanford Polygon Library", "ply" , &ExportScenePly,
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aiProcess_PreTransformVertices
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),
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#endif
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//#ifndef ASSIMP_BUILD_NO_3DS_EXPORTER
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// ExportFormatEntry( "3ds", "Autodesk 3DS (legacy format)", "3ds" , &ExportScene3DS),
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//#endif
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};
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#define ASSIMP_NUM_EXPORTERS (sizeof(gExporters)/sizeof(gExporters[0]))
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class ExporterPimpl {
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public:
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ExporterPimpl()
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: blob()
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, mIOSystem(new Assimp::DefaultIOSystem())
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, mIsDefaultIOHandler(true)
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{
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GetPostProcessingStepInstanceList(mPostProcessingSteps);
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// grab all builtin exporters
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mExporters.resize(ASSIMP_NUM_EXPORTERS);
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std::copy(gExporters,gExporters+ASSIMP_NUM_EXPORTERS,mExporters.begin());
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}
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~ExporterPimpl()
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{
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delete blob;
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// Delete all post-processing plug-ins
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for( unsigned int a = 0; a < mPostProcessingSteps.size(); a++) {
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delete mPostProcessingSteps[a];
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}
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}
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public:
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aiExportDataBlob* blob;
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boost::shared_ptr< Assimp::IOSystem > mIOSystem;
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bool mIsDefaultIOHandler;
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/** Post processing steps we can apply at the imported data. */
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std::vector< BaseProcess* > mPostProcessingSteps;
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/** Last fatal export error */
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std::string mError;
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/** Exporters, this includes those registered using #Assimp::Exporter::RegisterExporter */
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std::vector<Exporter::ExportFormatEntry> mExporters;
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};
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} // end of namespace Assimp
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using namespace Assimp;
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// ------------------------------------------------------------------------------------------------
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Exporter :: Exporter()
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: pimpl(new ExporterPimpl())
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{
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}
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// ------------------------------------------------------------------------------------------------
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Exporter :: ~Exporter()
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{
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FreeBlob();
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}
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// ------------------------------------------------------------------------------------------------
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void Exporter :: SetIOHandler( IOSystem* pIOHandler)
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{
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pimpl->mIsDefaultIOHandler = !pIOHandler;
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pimpl->mIOSystem.reset(pIOHandler);
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}
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// ------------------------------------------------------------------------------------------------
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IOSystem* Exporter :: GetIOHandler() const
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{
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return pimpl->mIOSystem.get();
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}
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// ------------------------------------------------------------------------------------------------
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bool Exporter :: IsDefaultIOHandler() const
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{
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return pimpl->mIsDefaultIOHandler;
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}
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// ------------------------------------------------------------------------------------------------
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const aiExportDataBlob* Exporter :: ExportToBlob( const aiScene* pScene, const char* pFormatId, unsigned int pPreprocessing )
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{
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if (pimpl->blob) {
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delete pimpl->blob;
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pimpl->blob = NULL;
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}
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boost::shared_ptr<IOSystem> old = pimpl->mIOSystem;
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BlobIOSystem* blobio = new BlobIOSystem();
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pimpl->mIOSystem = boost::shared_ptr<IOSystem>( blobio );
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if (AI_SUCCESS != Export(pScene,pFormatId,blobio->GetMagicFileName())) {
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pimpl->mIOSystem = old;
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return NULL;
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}
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pimpl->blob = blobio->GetBlobChain();
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pimpl->mIOSystem = old;
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return pimpl->blob;
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}
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// ------------------------------------------------------------------------------------------------
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aiReturn Exporter :: Export( const aiScene* pScene, const char* pFormatId, const char* pPath, unsigned int pPreprocessing )
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{
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ASSIMP_BEGIN_EXCEPTION_REGION();
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pimpl->mError = "";
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for (size_t i = 0; i < pimpl->mExporters.size(); ++i) {
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const Exporter::ExportFormatEntry& exp = pimpl->mExporters[i];
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if (!strcmp(exp.mDescription.id,pFormatId)) {
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try {
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// Always create a full copy of the scene. We might optimize this one day,
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// but for now it is the most pragmatic way.
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aiScene* scenecopy_tmp;
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SceneCombiner::CopyScene(&scenecopy_tmp,pScene);
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std::auto_ptr<aiScene> scenecopy(scenecopy_tmp);
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const ScenePrivateData* const priv = ScenePriv(pScene);
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// steps that are not idempotent, i.e. we might need to run them again, usually to get back to the
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// original state before the step was applied first. When checking which steps we don't need
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// to run, those are excluded.
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const unsigned int nonIdempotentSteps = aiProcess_FlipWindingOrder | aiProcess_FlipUVs | aiProcess_MakeLeftHanded;
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// Erase all pp steps that were already applied to this scene
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unsigned int pp = (exp.mEnforcePP | pPreprocessing) & ~(priv
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? (priv->mPPStepsApplied & ~nonIdempotentSteps)
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: 0u);
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// If no extra postprocessing was specified, and we obtained this scene from an
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// Assimp importer, apply the reverse steps automatically.
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if (!pPreprocessing && priv) {
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pp |= (nonIdempotentSteps & priv->mPPStepsApplied);
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}
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// If the input scene is not in verbose format, but there is at least postprocessing step that relies on it,
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// we need to run the MakeVerboseFormat step first.
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if (scenecopy->mFlags & AI_SCENE_FLAGS_NON_VERBOSE_FORMAT) {
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bool verbosify = false;
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for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {
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BaseProcess* const p = pimpl->mPostProcessingSteps[a];
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if (p->IsActive(pp) && p->RequireVerboseFormat()) {
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verbosify = true;
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break;
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}
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}
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if (verbosify || (exp.mEnforcePP & aiProcess_JoinIdenticalVertices)) {
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DefaultLogger::get()->debug("export: Scene data not in verbose format, applying MakeVerboseFormat step first");
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MakeVerboseFormatProcess proc;
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proc.Execute(scenecopy.get());
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}
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}
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if (pp) {
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// the three 'conversion' steps need to be executed first because all other steps rely on the standard data layout
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{
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FlipWindingOrderProcess step;
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if (step.IsActive(pp)) {
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step.Execute(scenecopy.get());
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}
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}
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{
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FlipUVsProcess step;
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if (step.IsActive(pp)) {
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step.Execute(scenecopy.get());
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}
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}
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{
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MakeLeftHandedProcess step;
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if (step.IsActive(pp)) {
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step.Execute(scenecopy.get());
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}
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}
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// dispatch other processes
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for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {
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BaseProcess* const p = pimpl->mPostProcessingSteps[a];
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if (p->IsActive(pp)
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&& !dynamic_cast<FlipUVsProcess*>(p)
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&& !dynamic_cast<FlipWindingOrderProcess*>(p)
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&& !dynamic_cast<MakeLeftHandedProcess*>(p)) {
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p->Execute(scenecopy.get());
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}
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}
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ScenePrivateData* const privOut = ScenePriv(scenecopy.get());
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ai_assert(privOut);
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privOut->mPPStepsApplied |= pp;
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}
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exp.mExportFunction(pPath,pimpl->mIOSystem.get(),scenecopy.get());
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}
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catch (DeadlyExportError& err) {
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pimpl->mError = err.what();
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return AI_FAILURE;
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}
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return AI_SUCCESS;
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}
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}
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pimpl->mError = std::string("Found no exporter to handle this file format: ") + pFormatId;
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ASSIMP_END_EXCEPTION_REGION(aiReturn);
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return AI_FAILURE;
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}
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// ------------------------------------------------------------------------------------------------
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const char* Exporter :: GetErrorString() const
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{
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return pimpl->mError.c_str();
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}
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// ------------------------------------------------------------------------------------------------
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void Exporter :: FreeBlob( )
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{
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delete pimpl->blob;
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pimpl->blob = NULL;
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pimpl->mError = "";
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}
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// ------------------------------------------------------------------------------------------------
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const aiExportDataBlob* Exporter :: GetBlob() const
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{
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return pimpl->blob;
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}
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// ------------------------------------------------------------------------------------------------
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const aiExportDataBlob* Exporter :: GetOrphanedBlob() const
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{
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const aiExportDataBlob* tmp = pimpl->blob;
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pimpl->blob = NULL;
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return tmp;
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}
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// ------------------------------------------------------------------------------------------------
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size_t Exporter :: GetExportFormatCount() const
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{
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return pimpl->mExporters.size();
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}
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// ------------------------------------------------------------------------------------------------
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const aiExportFormatDesc* Exporter :: GetExportFormatDescription( size_t pIndex ) const
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{
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if (pIndex >= GetExportFormatCount()) {
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return NULL;
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}
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return &pimpl->mExporters[pIndex].mDescription;
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}
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// ------------------------------------------------------------------------------------------------
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aiReturn Exporter :: RegisterExporter(const ExportFormatEntry& desc)
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{
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BOOST_FOREACH(const ExportFormatEntry& e, pimpl->mExporters) {
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if (!strcmp(e.mDescription.id,desc.mDescription.id)) {
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return aiReturn_FAILURE;
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}
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}
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pimpl->mExporters.push_back(desc);
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return aiReturn_SUCCESS;
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}
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// ------------------------------------------------------------------------------------------------
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void Exporter :: UnregisterExporter(const char* id)
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{
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for(std::vector<ExportFormatEntry>::iterator it = pimpl->mExporters.begin(); it != pimpl->mExporters.end(); ++it) {
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if (!strcmp((*it).mDescription.id,id)) {
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pimpl->mExporters.erase(it);
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break;
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}
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}
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}
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#endif // !ASSIMP_BUILD_NO_EXPORT
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