143 lines
4.5 KiB
C++
143 lines
4.5 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2019, assimp team
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Copyright (c) 2019 bzt
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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
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following 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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#if !(ASSIMP_BUILD_NO_EXPORT || ASSIMP_BUILD_NO_M3D_EXPORTER) || !ASSIMP_BUILD_NO_M3D_IMPORTER
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#include "M3DWrapper.h"
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#include <assimp/DefaultIOSystem.h>
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#include <assimp/IOStreamBuffer.h>
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#include <assimp/ai_assert.h>
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#ifdef ASSIMP_USE_M3D_READFILECB
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# if (__cplusplus >= 201103L) || !defined(_MSC_VER) || (_MSC_VER >= 1900) // C++11 and MSVC 2015 onwards
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# define threadlocal thread_local
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# else
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# if defined(_MSC_VER) && (_MSC_VER >= 1800) // there's an alternative for MSVC 2013
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# define threadlocal __declspec(thread)
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# else
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# define threadlocal
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# endif
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# endif
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extern "C" {
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// workaround: the M3D SDK expects a C callback, but we want to use Assimp::IOSystem to implement that
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threadlocal void *m3dimporter_pIOHandler;
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unsigned char *m3dimporter_readfile(char *fn, unsigned int *size) {
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ai_assert(nullptr != fn);
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ai_assert(nullptr != size);
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std::string file(fn);
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std::unique_ptr<Assimp::IOStream> pStream(
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(reinterpret_cast<Assimp::IOSystem *>(m3dimporter_pIOHandler))->Open(file, "rb"));
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size_t fileSize = 0;
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unsigned char *data = NULL;
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// sometimes pStream is nullptr in a single-threaded scenario too for some reason
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// (should be an empty object returning nothing I guess)
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if (pStream) {
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fileSize = pStream->FileSize();
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// should be allocated with malloc(), because the library will call free() to deallocate
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data = (unsigned char *)malloc(fileSize);
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if (!data || !pStream.get() || !fileSize || fileSize != pStream->Read(data, 1, fileSize)) {
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pStream.reset();
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*size = 0;
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// don't throw a deadly exception, it's not fatal if we can't read an external asset
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return nullptr;
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}
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pStream.reset();
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}
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*size = (int)fileSize;
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return data;
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}
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}
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#endif
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namespace Assimp {
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M3DWrapper::M3DWrapper() {
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// use malloc() here because m3d_free() will call free()
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m3d_ = (m3d_t *)calloc(1, sizeof(m3d_t));
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}
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M3DWrapper::M3DWrapper(IOSystem *pIOHandler, const std::vector<unsigned char> &buffer) {
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#ifdef ASSIMP_USE_M3D_READFILECB
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// pass this IOHandler to the C callback in a thread-local pointer
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m3dimporter_pIOHandler = pIOHandler;
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m3d_ = m3d_load(const_cast<unsigned char *>(buffer.data()), m3dimporter_readfile, free, nullptr);
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// Clear the C callback
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m3dimporter_pIOHandler = nullptr;
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#else
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m3d_ = m3d_load(const_cast<unsigned char *>(buffer.data()), nullptr, nullptr, nullptr);
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#endif
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}
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M3DWrapper::~M3DWrapper() {
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reset();
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}
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void M3DWrapper::reset() {
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ClearSave();
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if (m3d_)
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m3d_free(m3d_);
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m3d_ = nullptr;
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}
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unsigned char *M3DWrapper::Save(int quality, int flags, unsigned int &size) {
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#if (!(ASSIMP_BUILD_NO_EXPORT || ASSIMP_BUILD_NO_M3D_EXPORTER))
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ClearSave();
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saved_output_ = m3d_save(m3d_, quality, flags, &size);
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return saved_output_;
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#else
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return nullptr;
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#endif
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}
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void M3DWrapper::ClearSave() {
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if (saved_output_)
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M3D_FREE(saved_output_);
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saved_output_ = nullptr;
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}
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} // namespace Assimp
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#endif
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