1 files changed, 152 insertions, 0 deletions
diff --git a/libs/assimp/code/AssetLib/M3D/M3DWrapper.cpp b/libs/assimp/code/AssetLib/M3D/M3DWrapper.cpp
new file mode 100644
index 0000000..30452c7
--- /dev/null
+++ b/libs/assimp/code/AssetLib/M3D/M3DWrapper.cpp
@@ -0,0 +1,152 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+Copyright (c) 2019 bzt
+
+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.
+
+----------------------------------------------------------------------
+*/
+#ifndef ASSIMP_BUILD_NO_M3D_IMPORTER
+#if !(ASSIMP_BUILD_NO_EXPORT || ASSIMP_BUILD_NO_M3D_EXPORTER)
+
+#include "M3DWrapper.h"
+
+#include <assimp/DefaultIOSystem.h>
+#include <assimp/IOStreamBuffer.h>
+#include <assimp/ai_assert.h>
+
+#ifdef ASSIMP_USE_M3D_READFILECB
+
+#if (__cplusplus >= 201103L) || !defined(_MSC_VER) || (_MSC_VER >= 1900) // C++11 and MSVC 2015 onwards
+#define threadlocal thread_local
+#else
+#if defined(_MSC_VER) && (_MSC_VER >= 1800) // there's an alternative for MSVC 2013
+#define threadlocal __declspec(thread)
+#else
+#define threadlocal
+#endif
+#endif
+
+extern "C" {
+
+// workaround: the M3D SDK expects a C callback, but we want to use Assimp::IOSystem to implement that
+threadlocal void *m3dimporter_pIOHandler;
+
+unsigned char *m3dimporter_readfile(char *fn, unsigned int *size) {
+    ai_assert(nullptr != fn);
+    ai_assert(nullptr != size);
+    std::string file(fn);
+    std::unique_ptr<Assimp::IOStream> pStream(
+            (reinterpret_cast<Assimp::IOSystem *>(m3dimporter_pIOHandler))->Open(file, "rb"));
+    size_t fileSize = 0;
+    unsigned char *data = nullptr;
+    // sometimes pStream is nullptr in a single-threaded scenario too for some reason
+    // (should be an empty object returning nothing I guess)
+    if (pStream) {
+        fileSize = pStream->FileSize();
+        // should be allocated with malloc(), because the library will call free() to deallocate
+        data = (unsigned char *)malloc(fileSize);
+        if (!data || !pStream.get() || !fileSize || fileSize != pStream->Read(data, 1, fileSize)) {
+            pStream.reset();
+            *size = 0;
+            // don't throw a deadly exception, it's not fatal if we can't read an external asset
+            return nullptr;
+        }
+        pStream.reset();
+    }
+    *size = (int)fileSize;
+    return data;
+}
+}
+#endif
+
+namespace Assimp {
+M3DWrapper::M3DWrapper() {
+    // use malloc() here because m3d_free() will call free()
+    m3d_ = (m3d_t *)calloc(1, sizeof(m3d_t));
+}
+
+M3DWrapper::M3DWrapper(IOSystem *pIOHandler, const std::vector<unsigned char> &buffer) {
+    if (nullptr == pIOHandler) {
+        ai_assert(nullptr != pIOHandler);
+    }
+
+#ifdef ASSIMP_USE_M3D_READFILECB
+    // pass this IOHandler to the C callback in a thread-local pointer
+    m3dimporter_pIOHandler = pIOHandler;
+    m3d_ = m3d_load(const_cast<unsigned char *>(buffer.data()), m3dimporter_readfile, free, nullptr);
+    // Clear the C callback
+    m3dimporter_pIOHandler = nullptr;
+#else
+    m3d_ = m3d_load(const_cast<unsigned char *>(buffer.data()), nullptr, nullptr, nullptr);
+#endif
+}
+
+M3DWrapper::~M3DWrapper() {
+    reset();
+}
+
+void M3DWrapper::reset() {
+    ClearSave();
+    if (m3d_) {
+        m3d_free(m3d_);
+    }
+    m3d_ = nullptr;
+}
+
+unsigned char *M3DWrapper::Save(int quality, int flags, unsigned int &size) {
+#if (!(ASSIMP_BUILD_NO_EXPORT || ASSIMP_BUILD_NO_M3D_EXPORTER))
+    ClearSave();
+    saved_output_ = m3d_save(m3d_, quality, flags, &size);
+    return saved_output_;
+#else
+    (void)quality;
+    (void)flags;
+    (void)size;
+    return nullptr;
+#endif
+}
+
+void M3DWrapper::ClearSave() {
+    if (saved_output_) {
+        M3D_FREE(saved_output_);
+    }
+    saved_output_ = nullptr;
+}
+} // namespace Assimp
+
+#endif
+#endif