819 lines
28 KiB
C++
819 lines
28 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2020, 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
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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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#include <rapidjson/stringbuffer.h>
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#include <rapidjson/writer.h>
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#include <rapidjson/prettywriter.h>
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namespace glTF2 {
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using rapidjson::StringBuffer;
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using rapidjson::PrettyWriter;
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using rapidjson::Writer;
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using rapidjson::StringRef;
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using rapidjson::StringRef;
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namespace {
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template<typename T, size_t N>
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inline Value& MakeValue(Value& val, T(&r)[N], MemoryPoolAllocator<>& al) {
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val.SetArray();
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val.Reserve(N, al);
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for (decltype(N) i = 0; i < N; ++i) {
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val.PushBack(r[i], al);
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}
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return val;
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}
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template<typename T>
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inline Value& MakeValue(Value& val, const std::vector<T> & r, MemoryPoolAllocator<>& al) {
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val.SetArray();
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val.Reserve(static_cast<rapidjson::SizeType>(r.size()), al);
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for (unsigned int i = 0; i < r.size(); ++i) {
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val.PushBack(r[i], al);
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}
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return val;
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}
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template<typename C, typename T>
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inline Value& MakeValueCast(Value& val, const std::vector<T> & r, MemoryPoolAllocator<>& al) {
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val.SetArray();
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val.Reserve(static_cast<rapidjson::SizeType>(r.size()), al);
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for (unsigned int i = 0; i < r.size(); ++i) {
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val.PushBack(static_cast<C>(r[i]), al);
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}
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return val;
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}
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template<typename T>
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inline Value& MakeValue(Value& val, T r, MemoryPoolAllocator<>& /*al*/) {
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val.Set(r);
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return val;
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}
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template<class T>
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inline void AddRefsVector(Value& obj, const char* fieldId, std::vector< Ref<T> >& v, MemoryPoolAllocator<>& al) {
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if (v.empty()) return;
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Value lst;
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lst.SetArray();
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lst.Reserve(unsigned(v.size()), al);
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for (size_t i = 0; i < v.size(); ++i) {
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lst.PushBack(v[i]->index, al);
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}
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obj.AddMember(StringRef(fieldId), lst, al);
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}
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}
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inline void Write(Value& obj, Accessor& a, AssetWriter& w)
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{
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obj.AddMember("bufferView", a.bufferView->index, w.mAl);
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obj.AddMember("byteOffset", (unsigned int)a.byteOffset, w.mAl);
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obj.AddMember("componentType", int(a.componentType), w.mAl);
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obj.AddMember("count", (unsigned int)a.count, w.mAl);
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obj.AddMember("type", StringRef(AttribType::ToString(a.type)), w.mAl);
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Value vTmpMax, vTmpMin;
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if (a.componentType == ComponentType_FLOAT) {
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obj.AddMember("max", MakeValue(vTmpMax, a.max, w.mAl), w.mAl);
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obj.AddMember("min", MakeValue(vTmpMin, a.min, w.mAl), w.mAl);
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} else {
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obj.AddMember("max", MakeValueCast<int64_t>(vTmpMax, a.max, w.mAl), w.mAl);
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obj.AddMember("min", MakeValueCast<int64_t>(vTmpMin, a.min, w.mAl), w.mAl);
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}
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}
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inline void Write(Value& obj, Animation& a, AssetWriter& w)
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{
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/****************** Channels *******************/
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Value channels;
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channels.SetArray();
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channels.Reserve(unsigned(a.channels.size()), w.mAl);
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for (size_t i = 0; i < unsigned(a.channels.size()); ++i) {
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Animation::Channel& c = a.channels[i];
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Value valChannel;
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valChannel.SetObject();
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{
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valChannel.AddMember("sampler", c.sampler, w.mAl);
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Value valTarget;
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valTarget.SetObject();
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{
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valTarget.AddMember("node", c.target.node->index, w.mAl);
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switch (c.target.path) {
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case AnimationPath_TRANSLATION:
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valTarget.AddMember("path", "translation", w.mAl);
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break;
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case AnimationPath_ROTATION:
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valTarget.AddMember("path", "rotation", w.mAl);
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break;
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case AnimationPath_SCALE:
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valTarget.AddMember("path", "scale", w.mAl);
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break;
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case AnimationPath_WEIGHTS:
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valTarget.AddMember("path", "weights", w.mAl);
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break;
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}
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}
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valChannel.AddMember("target", valTarget, w.mAl);
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}
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channels.PushBack(valChannel, w.mAl);
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}
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obj.AddMember("channels", channels, w.mAl);
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/****************** Samplers *******************/
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Value valSamplers;
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valSamplers.SetArray();
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for (size_t i = 0; i < unsigned(a.samplers.size()); ++i) {
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Animation::Sampler& s = a.samplers[i];
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Value valSampler;
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valSampler.SetObject();
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{
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valSampler.AddMember("input", s.input->index, w.mAl);
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switch (s.interpolation) {
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case Interpolation_LINEAR:
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valSampler.AddMember("interpolation", "LINEAR", w.mAl);
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break;
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case Interpolation_STEP:
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valSampler.AddMember("interpolation", "STEP", w.mAl);
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break;
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case Interpolation_CUBICSPLINE:
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valSampler.AddMember("interpolation", "CUBICSPLINE", w.mAl);
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break;
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}
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valSampler.AddMember("output", s.output->index, w.mAl);
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}
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valSamplers.PushBack(valSampler, w.mAl);
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}
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obj.AddMember("samplers", valSamplers, w.mAl);
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}
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inline void Write(Value& obj, Buffer& b, AssetWriter& w)
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{
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obj.AddMember("byteLength", static_cast<uint64_t>(b.byteLength), w.mAl);
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const auto uri = b.GetURI();
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const auto relativeUri = uri.substr(uri.find_last_of("/\\") + 1u);
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obj.AddMember("uri", Value(relativeUri, w.mAl).Move(), w.mAl);
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}
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inline void Write(Value& obj, BufferView& bv, AssetWriter& w)
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{
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obj.AddMember("buffer", bv.buffer->index, w.mAl);
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obj.AddMember("byteOffset", static_cast<uint64_t>(bv.byteOffset), w.mAl);
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obj.AddMember("byteLength", static_cast<uint64_t>(bv.byteLength), w.mAl);
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if (bv.byteStride != 0) {
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obj.AddMember("byteStride", bv.byteStride, w.mAl);
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}
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if (bv.target != BufferViewTarget_NONE) {
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obj.AddMember("target", int(bv.target), w.mAl);
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}
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}
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inline void Write(Value& /*obj*/, Camera& /*c*/, AssetWriter& /*w*/)
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{
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}
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inline void Write(Value& /*obj*/, Light& /*c*/, AssetWriter& /*w*/)
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{
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}
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inline void Write(Value& obj, Image& img, AssetWriter& w)
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{
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if (img.bufferView) {
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obj.AddMember("bufferView", img.bufferView->index, w.mAl);
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obj.AddMember("mimeType", Value(img.mimeType, w.mAl).Move(), w.mAl);
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}
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else {
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std::string uri;
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if (img.HasData()) {
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uri = "data:" + (img.mimeType.empty() ? "application/octet-stream" : img.mimeType);
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uri += ";base64,";
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glTFCommon::Util::EncodeBase64(img.GetData(), img.GetDataLength(), uri);
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}
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else {
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uri = img.uri;
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}
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obj.AddMember("uri", Value(uri, w.mAl).Move(), w.mAl);
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}
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}
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namespace {
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inline void SetTexBasic(TextureInfo t, Value& tex, MemoryPoolAllocator<>& al)
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{
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tex.SetObject();
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tex.AddMember("index", t.texture->index, al);
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if (t.texCoord != 0) {
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tex.AddMember("texCoord", t.texCoord, al);
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}
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}
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inline void WriteTex(Value& obj, TextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
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{
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if (t.texture) {
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Value tex;
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SetTexBasic(t, tex, al);
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obj.AddMember(StringRef(propName), tex, al);
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}
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}
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inline void WriteTex(Value& obj, NormalTextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
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{
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if (t.texture) {
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Value tex;
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SetTexBasic(t, tex, al);
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if (t.scale != 1) {
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tex.AddMember("scale", t.scale, al);
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}
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obj.AddMember(StringRef(propName), tex, al);
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}
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}
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inline void WriteTex(Value& obj, OcclusionTextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
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{
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if (t.texture) {
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Value tex;
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SetTexBasic(t, tex, al);
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if (t.strength != 1) {
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tex.AddMember("strength", t.strength, al);
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}
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obj.AddMember(StringRef(propName), tex, al);
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}
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}
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template<size_t N>
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inline void WriteVec(Value& obj, float(&prop)[N], const char* propName, MemoryPoolAllocator<>& al)
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{
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Value arr;
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obj.AddMember(StringRef(propName), MakeValue(arr, prop, al), al);
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}
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template<size_t N>
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inline void WriteVec(Value& obj, float(&prop)[N], const char* propName, const float(&defaultVal)[N], MemoryPoolAllocator<>& al)
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{
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if (!std::equal(std::begin(prop), std::end(prop), std::begin(defaultVal))) {
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WriteVec(obj, prop, propName, al);
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}
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}
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inline void WriteFloat(Value& obj, float prop, const char* propName, MemoryPoolAllocator<>& al)
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{
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Value num;
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obj.AddMember(StringRef(propName), MakeValue(num, prop, al), al);
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}
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}
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inline void Write(Value& obj, Material& m, AssetWriter& w)
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{
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Value pbrMetallicRoughness;
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pbrMetallicRoughness.SetObject();
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{
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WriteTex(pbrMetallicRoughness, m.pbrMetallicRoughness.baseColorTexture, "baseColorTexture", w.mAl);
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WriteTex(pbrMetallicRoughness, m.pbrMetallicRoughness.metallicRoughnessTexture, "metallicRoughnessTexture", w.mAl);
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WriteVec(pbrMetallicRoughness, m.pbrMetallicRoughness.baseColorFactor, "baseColorFactor", defaultBaseColor, w.mAl);
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if (m.pbrMetallicRoughness.metallicFactor != 1) {
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WriteFloat(pbrMetallicRoughness, m.pbrMetallicRoughness.metallicFactor, "metallicFactor", w.mAl);
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}
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if (m.pbrMetallicRoughness.roughnessFactor != 1) {
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WriteFloat(pbrMetallicRoughness, m.pbrMetallicRoughness.roughnessFactor, "roughnessFactor", w.mAl);
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}
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}
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if (!pbrMetallicRoughness.ObjectEmpty()) {
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obj.AddMember("pbrMetallicRoughness", pbrMetallicRoughness, w.mAl);
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}
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WriteTex(obj, m.normalTexture, "normalTexture", w.mAl);
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WriteTex(obj, m.emissiveTexture, "emissiveTexture", w.mAl);
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WriteTex(obj, m.occlusionTexture, "occlusionTexture", w.mAl);
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WriteVec(obj, m.emissiveFactor, "emissiveFactor", defaultEmissiveFactor, w.mAl);
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if (m.alphaCutoff != 0.5) {
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WriteFloat(obj, m.alphaCutoff, "alphaCutoff", w.mAl);
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}
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if (m.alphaMode != "OPAQUE") {
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obj.AddMember("alphaMode", Value(m.alphaMode, w.mAl).Move(), w.mAl);
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}
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if (m.doubleSided) {
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obj.AddMember("doubleSided", m.doubleSided, w.mAl);
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}
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Value exts;
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exts.SetObject();
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if (m.pbrSpecularGlossiness.isPresent) {
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Value pbrSpecularGlossiness;
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pbrSpecularGlossiness.SetObject();
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PbrSpecularGlossiness &pbrSG = m.pbrSpecularGlossiness.value;
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//pbrSpecularGlossiness
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WriteVec(pbrSpecularGlossiness, pbrSG.diffuseFactor, "diffuseFactor", defaultDiffuseFactor, w.mAl);
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WriteVec(pbrSpecularGlossiness, pbrSG.specularFactor, "specularFactor", defaultSpecularFactor, w.mAl);
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if (pbrSG.glossinessFactor != 1) {
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WriteFloat(pbrSpecularGlossiness, pbrSG.glossinessFactor, "glossinessFactor", w.mAl);
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}
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WriteTex(pbrSpecularGlossiness, pbrSG.diffuseTexture, "diffuseTexture", w.mAl);
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WriteTex(pbrSpecularGlossiness, pbrSG.specularGlossinessTexture, "specularGlossinessTexture", w.mAl);
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if (!pbrSpecularGlossiness.ObjectEmpty()) {
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exts.AddMember("KHR_materials_pbrSpecularGlossiness", pbrSpecularGlossiness, w.mAl);
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}
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}
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if (m.unlit) {
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Value unlit;
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unlit.SetObject();
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exts.AddMember("KHR_materials_unlit", unlit, w.mAl);
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}
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if (!exts.ObjectEmpty()) {
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obj.AddMember("extensions", exts, w.mAl);
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}
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}
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namespace {
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inline void WriteAttrs(AssetWriter& w, Value& attrs, Mesh::AccessorList& lst,
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const char* semantic, bool forceNumber = false)
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{
|
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if (lst.empty()) return;
|
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if (lst.size() == 1 && !forceNumber) {
|
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attrs.AddMember(StringRef(semantic), lst[0]->index, w.mAl);
|
|
}
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else {
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for (size_t i = 0; i < lst.size(); ++i) {
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char buffer[32];
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ai_snprintf(buffer, 32, "%s_%d", semantic, int(i));
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attrs.AddMember(Value(buffer, w.mAl).Move(), lst[i]->index, w.mAl);
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}
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}
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}
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}
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inline void Write(Value& obj, Mesh& m, AssetWriter& w)
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{
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/****************** Primitives *******************/
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Value primitives;
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primitives.SetArray();
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primitives.Reserve(unsigned(m.primitives.size()), w.mAl);
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for (size_t i = 0; i < m.primitives.size(); ++i) {
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Mesh::Primitive& p = m.primitives[i];
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Value prim;
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prim.SetObject();
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{
|
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prim.AddMember("mode", Value(int(p.mode)).Move(), w.mAl);
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if (p.material)
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prim.AddMember("material", p.material->index, w.mAl);
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if (p.indices)
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prim.AddMember("indices", p.indices->index, w.mAl);
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Value attrs;
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attrs.SetObject();
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{
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WriteAttrs(w, attrs, p.attributes.position, "POSITION");
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WriteAttrs(w, attrs, p.attributes.normal, "NORMAL");
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WriteAttrs(w, attrs, p.attributes.texcoord, "TEXCOORD", true);
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WriteAttrs(w, attrs, p.attributes.color, "COLOR", true);
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WriteAttrs(w, attrs, p.attributes.joint, "JOINTS", true);
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WriteAttrs(w, attrs, p.attributes.weight, "WEIGHTS", true);
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}
|
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prim.AddMember("attributes", attrs, w.mAl);
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// targets for blendshapes
|
|
if (p.targets.size() > 0) {
|
|
Value tjs;
|
|
tjs.SetArray();
|
|
tjs.Reserve(unsigned(p.targets.size()), w.mAl);
|
|
for (unsigned int t = 0; t < p.targets.size(); ++t) {
|
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Value tj;
|
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tj.SetObject();
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{
|
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WriteAttrs(w, tj, p.targets[t].position, "POSITION");
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WriteAttrs(w, tj, p.targets[t].normal, "NORMAL");
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WriteAttrs(w, tj, p.targets[t].tangent, "TANGENT");
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}
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tjs.PushBack(tj, w.mAl);
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}
|
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prim.AddMember("targets", tjs, w.mAl);
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}
|
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}
|
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primitives.PushBack(prim, w.mAl);
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}
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obj.AddMember("primitives", primitives, w.mAl);
|
|
}
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|
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inline void Write(Value& obj, Node& n, AssetWriter& w)
|
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{
|
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|
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if (n.matrix.isPresent) {
|
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Value val;
|
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obj.AddMember("matrix", MakeValue(val, n.matrix.value, w.mAl).Move(), w.mAl);
|
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}
|
|
|
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if (n.translation.isPresent) {
|
|
Value val;
|
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obj.AddMember("translation", MakeValue(val, n.translation.value, w.mAl).Move(), w.mAl);
|
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}
|
|
|
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if (n.scale.isPresent) {
|
|
Value val;
|
|
obj.AddMember("scale", MakeValue(val, n.scale.value, w.mAl).Move(), w.mAl);
|
|
}
|
|
if (n.rotation.isPresent) {
|
|
Value val;
|
|
obj.AddMember("rotation", MakeValue(val, n.rotation.value, w.mAl).Move(), w.mAl);
|
|
}
|
|
|
|
AddRefsVector(obj, "children", n.children, w.mAl);
|
|
|
|
if (!n.meshes.empty()) {
|
|
obj.AddMember("mesh", n.meshes[0]->index, w.mAl);
|
|
}
|
|
|
|
AddRefsVector(obj, "skeletons", n.skeletons, w.mAl);
|
|
|
|
if (n.skin) {
|
|
obj.AddMember("skin", n.skin->index, w.mAl);
|
|
}
|
|
|
|
if (!n.jointName.empty()) {
|
|
obj.AddMember("jointName", n.jointName, w.mAl);
|
|
}
|
|
}
|
|
|
|
inline void Write(Value& /*obj*/, Program& /*b*/, AssetWriter& /*w*/)
|
|
{
|
|
|
|
}
|
|
|
|
inline void Write(Value& obj, Sampler& b, AssetWriter& w)
|
|
{
|
|
if (!b.name.empty()) {
|
|
obj.AddMember("name", b.name, w.mAl);
|
|
}
|
|
|
|
if (b.wrapS != SamplerWrap::UNSET && b.wrapS != SamplerWrap::Repeat) {
|
|
obj.AddMember("wrapS", static_cast<unsigned int>(b.wrapS), w.mAl);
|
|
}
|
|
|
|
if (b.wrapT != SamplerWrap::UNSET && b.wrapT != SamplerWrap::Repeat) {
|
|
obj.AddMember("wrapT", static_cast<unsigned int>(b.wrapT), w.mAl);
|
|
}
|
|
|
|
if (b.magFilter != SamplerMagFilter::UNSET) {
|
|
obj.AddMember("magFilter", static_cast<unsigned int>(b.magFilter), w.mAl);
|
|
}
|
|
|
|
if (b.minFilter != SamplerMinFilter::UNSET) {
|
|
obj.AddMember("minFilter", static_cast<unsigned int>(b.minFilter), w.mAl);
|
|
}
|
|
}
|
|
|
|
inline void Write(Value& scene, Scene& s, AssetWriter& w)
|
|
{
|
|
AddRefsVector(scene, "nodes", s.nodes, w.mAl);
|
|
}
|
|
|
|
inline void Write(Value& /*obj*/, Shader& /*b*/, AssetWriter& /*w*/)
|
|
{
|
|
|
|
}
|
|
|
|
inline void Write(Value& obj, Skin& b, AssetWriter& w)
|
|
{
|
|
/****************** jointNames *******************/
|
|
Value vJointNames;
|
|
vJointNames.SetArray();
|
|
vJointNames.Reserve(unsigned(b.jointNames.size()), w.mAl);
|
|
|
|
for (size_t i = 0; i < unsigned(b.jointNames.size()); ++i) {
|
|
vJointNames.PushBack(b.jointNames[i]->index, w.mAl);
|
|
}
|
|
obj.AddMember("joints", vJointNames, w.mAl);
|
|
|
|
if (b.bindShapeMatrix.isPresent) {
|
|
Value val;
|
|
obj.AddMember("bindShapeMatrix", MakeValue(val, b.bindShapeMatrix.value, w.mAl).Move(), w.mAl);
|
|
}
|
|
|
|
if (b.inverseBindMatrices) {
|
|
obj.AddMember("inverseBindMatrices", b.inverseBindMatrices->index, w.mAl);
|
|
}
|
|
|
|
}
|
|
|
|
inline void Write(Value& obj, Texture& tex, AssetWriter& w)
|
|
{
|
|
if (tex.source) {
|
|
obj.AddMember("source", tex.source->index, w.mAl);
|
|
}
|
|
if (tex.sampler) {
|
|
obj.AddMember("sampler", tex.sampler->index, w.mAl);
|
|
}
|
|
}
|
|
|
|
|
|
inline AssetWriter::AssetWriter(Asset& a)
|
|
: mDoc()
|
|
, mAsset(a)
|
|
, mAl(mDoc.GetAllocator())
|
|
{
|
|
mDoc.SetObject();
|
|
|
|
WriteMetadata();
|
|
WriteExtensionsUsed();
|
|
|
|
// Dump the contents of the dictionaries
|
|
for (size_t i = 0; i < a.mDicts.size(); ++i) {
|
|
a.mDicts[i]->WriteObjects(*this);
|
|
}
|
|
|
|
// Add the target scene field
|
|
if (mAsset.scene) {
|
|
mDoc.AddMember("scene", mAsset.scene->index, mAl);
|
|
}
|
|
}
|
|
|
|
inline void AssetWriter::WriteFile(const char* path)
|
|
{
|
|
std::unique_ptr<IOStream> jsonOutFile(mAsset.OpenFile(path, "wt", true));
|
|
|
|
if (jsonOutFile == 0) {
|
|
throw DeadlyExportError("Could not open output file: " + std::string(path));
|
|
}
|
|
|
|
StringBuffer docBuffer;
|
|
|
|
PrettyWriter<StringBuffer> writer(docBuffer);
|
|
mDoc.Accept(writer);
|
|
|
|
if (jsonOutFile->Write(docBuffer.GetString(), docBuffer.GetSize(), 1) != 1) {
|
|
throw DeadlyExportError("Failed to write scene data!");
|
|
}
|
|
|
|
// Write buffer data to separate .bin files
|
|
for (unsigned int i = 0; i < mAsset.buffers.Size(); ++i) {
|
|
Ref<Buffer> b = mAsset.buffers.Get(i);
|
|
|
|
std::string binPath = b->GetURI();
|
|
|
|
std::unique_ptr<IOStream> binOutFile(mAsset.OpenFile(binPath, "wb", true));
|
|
|
|
if (binOutFile == 0) {
|
|
throw DeadlyExportError("Could not open output file: " + binPath);
|
|
}
|
|
|
|
if (b->byteLength > 0) {
|
|
if (binOutFile->Write(b->GetPointer(), b->byteLength, 1) != 1) {
|
|
throw DeadlyExportError("Failed to write binary file: " + binPath);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void AssetWriter::WriteGLBFile(const char* path)
|
|
{
|
|
std::unique_ptr<IOStream> outfile(mAsset.OpenFile(path, "wb", true));
|
|
|
|
if (outfile == 0) {
|
|
throw DeadlyExportError("Could not open output file: " + std::string(path));
|
|
}
|
|
|
|
Ref<Buffer> bodyBuffer = mAsset.GetBodyBuffer();
|
|
if (bodyBuffer->byteLength > 0) {
|
|
rapidjson::Value glbBodyBuffer;
|
|
glbBodyBuffer.SetObject();
|
|
glbBodyBuffer.AddMember("byteLength", static_cast<uint64_t>(bodyBuffer->byteLength), mAl);
|
|
mDoc["buffers"].PushBack(glbBodyBuffer, mAl);
|
|
}
|
|
|
|
// Padding with spaces as required by the spec
|
|
uint32_t padding = 0x20202020;
|
|
|
|
//
|
|
// JSON chunk
|
|
//
|
|
|
|
StringBuffer docBuffer;
|
|
Writer<StringBuffer> writer(docBuffer);
|
|
mDoc.Accept(writer);
|
|
|
|
uint32_t jsonChunkLength = (docBuffer.GetSize() + 3) & ~3; // Round up to next multiple of 4
|
|
auto paddingLength = jsonChunkLength - docBuffer.GetSize();
|
|
|
|
GLB_Chunk jsonChunk;
|
|
jsonChunk.chunkLength = jsonChunkLength;
|
|
jsonChunk.chunkType = ChunkType_JSON;
|
|
AI_SWAP4(jsonChunk.chunkLength);
|
|
|
|
outfile->Seek(sizeof(GLB_Header), aiOrigin_SET);
|
|
if (outfile->Write(&jsonChunk, 1, sizeof(GLB_Chunk)) != sizeof(GLB_Chunk)) {
|
|
throw DeadlyExportError("Failed to write scene data header!");
|
|
}
|
|
if (outfile->Write(docBuffer.GetString(), 1, docBuffer.GetSize()) != docBuffer.GetSize()) {
|
|
throw DeadlyExportError("Failed to write scene data!");
|
|
}
|
|
if (paddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
|
|
throw DeadlyExportError("Failed to write scene data padding!");
|
|
}
|
|
|
|
//
|
|
// Binary chunk
|
|
//
|
|
|
|
uint32_t binaryChunkLength = 0;
|
|
if (bodyBuffer->byteLength > 0) {
|
|
binaryChunkLength = (bodyBuffer->byteLength + 3) & ~3; // Round up to next multiple of 4
|
|
auto paddingLength = binaryChunkLength - bodyBuffer->byteLength;
|
|
|
|
GLB_Chunk binaryChunk;
|
|
binaryChunk.chunkLength = binaryChunkLength;
|
|
binaryChunk.chunkType = ChunkType_BIN;
|
|
AI_SWAP4(binaryChunk.chunkLength);
|
|
|
|
size_t bodyOffset = sizeof(GLB_Header) + sizeof(GLB_Chunk) + jsonChunk.chunkLength;
|
|
outfile->Seek(bodyOffset, aiOrigin_SET);
|
|
if (outfile->Write(&binaryChunk, 1, sizeof(GLB_Chunk)) != sizeof(GLB_Chunk)) {
|
|
throw DeadlyExportError("Failed to write body data header!");
|
|
}
|
|
if (outfile->Write(bodyBuffer->GetPointer(), 1, bodyBuffer->byteLength) != bodyBuffer->byteLength) {
|
|
throw DeadlyExportError("Failed to write body data!");
|
|
}
|
|
if (paddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
|
|
throw DeadlyExportError("Failed to write body data padding!");
|
|
}
|
|
}
|
|
|
|
//
|
|
// Header
|
|
//
|
|
|
|
GLB_Header header;
|
|
memcpy(header.magic, AI_GLB_MAGIC_NUMBER, sizeof(header.magic));
|
|
|
|
header.version = 2;
|
|
AI_SWAP4(header.version);
|
|
|
|
header.length = uint32_t(sizeof(GLB_Header) + 2 * sizeof(GLB_Chunk) + jsonChunkLength + binaryChunkLength);
|
|
AI_SWAP4(header.length);
|
|
|
|
outfile->Seek(0, aiOrigin_SET);
|
|
if (outfile->Write(&header, 1, sizeof(GLB_Header)) != sizeof(GLB_Header)) {
|
|
throw DeadlyExportError("Failed to write the header!");
|
|
}
|
|
}
|
|
|
|
inline void AssetWriter::WriteMetadata()
|
|
{
|
|
Value asset;
|
|
asset.SetObject();
|
|
asset.AddMember("version", Value(mAsset.asset.version, mAl).Move(), mAl);
|
|
asset.AddMember("generator", Value(mAsset.asset.generator, mAl).Move(), mAl);
|
|
if (!mAsset.asset.copyright.empty())
|
|
asset.AddMember("copyright", Value(mAsset.asset.copyright, mAl).Move(), mAl);
|
|
mDoc.AddMember("asset", asset, mAl);
|
|
}
|
|
|
|
inline void AssetWriter::WriteExtensionsUsed()
|
|
{
|
|
Value exts;
|
|
exts.SetArray();
|
|
{
|
|
// This is used to export pbrSpecularGlossiness materials with GLTF 2.
|
|
if (this->mAsset.extensionsUsed.KHR_materials_pbrSpecularGlossiness) {
|
|
exts.PushBack(StringRef("KHR_materials_pbrSpecularGlossiness"), mAl);
|
|
}
|
|
|
|
if (this->mAsset.extensionsUsed.KHR_materials_unlit) {
|
|
exts.PushBack(StringRef("KHR_materials_unlit"), mAl);
|
|
}
|
|
}
|
|
|
|
if (!exts.Empty())
|
|
mDoc.AddMember("extensionsUsed", exts, mAl);
|
|
}
|
|
|
|
template<class T>
|
|
void AssetWriter::WriteObjects(LazyDict<T>& d)
|
|
{
|
|
if (d.mObjs.empty()) return;
|
|
|
|
Value* container = &mDoc;
|
|
|
|
if (d.mExtId) {
|
|
Value* exts = FindObject(mDoc, "extensions");
|
|
if (!exts) {
|
|
mDoc.AddMember("extensions", Value().SetObject().Move(), mDoc.GetAllocator());
|
|
exts = FindObject(mDoc, "extensions");
|
|
}
|
|
|
|
if (!(container = FindObject(*exts, d.mExtId))) {
|
|
exts->AddMember(StringRef(d.mExtId), Value().SetObject().Move(), mDoc.GetAllocator());
|
|
container = FindObject(*exts, d.mExtId);
|
|
}
|
|
}
|
|
|
|
Value* dict;
|
|
if (!(dict = FindArray(*container, d.mDictId))) {
|
|
container->AddMember(StringRef(d.mDictId), Value().SetArray().Move(), mDoc.GetAllocator());
|
|
dict = FindArray(*container, d.mDictId);
|
|
if (nullptr == dict) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (size_t i = 0; i < d.mObjs.size(); ++i) {
|
|
if (d.mObjs[i]->IsSpecial()) continue;
|
|
|
|
Value obj;
|
|
obj.SetObject();
|
|
|
|
if (!d.mObjs[i]->name.empty()) {
|
|
obj.AddMember("name", StringRef(d.mObjs[i]->name.c_str()), mAl);
|
|
}
|
|
|
|
Write(obj, *d.mObjs[i], *this);
|
|
|
|
dict->PushBack(obj, mAl);
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
void WriteLazyDict(LazyDict<T>& d, AssetWriter& w)
|
|
{
|
|
w.WriteObjects(d);
|
|
}
|
|
|
|
}
|
|
|
|
|