1644 lines
52 KiB
C++
1644 lines
52 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2017, 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 "StringUtils.h"
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#include <iomanip>
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// Header files, Assimp
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#include <assimp/DefaultLogger.hpp>
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#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
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// Header files, Open3DGC.
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# include <Open3DGC/o3dgcSC3DMCDecoder.h>
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#endif
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using namespace Assimp;
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namespace glTF {
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namespace {
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//
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// JSON Value reading helpers
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//
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template<class T>
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struct ReadHelper { static bool Read(Value& val, T& out) {
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return val.IsInt() ? out = static_cast<T>(val.GetInt()), true : false;
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}};
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template<> struct ReadHelper<bool> { static bool Read(Value& val, bool& out) {
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return val.IsBool() ? out = val.GetBool(), true : false;
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}};
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template<> struct ReadHelper<float> { static bool Read(Value& val, float& out) {
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return val.IsNumber() ? out = static_cast<float>(val.GetDouble()), true : false;
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}};
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template<unsigned int N> struct ReadHelper<float[N]> { static bool Read(Value& val, float (&out)[N]) {
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if (!val.IsArray() || val.Size() != N) return false;
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for (unsigned int i = 0; i < N; ++i) {
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if (val[i].IsNumber())
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out[i] = static_cast<float>(val[i].GetDouble());
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}
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return true;
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}};
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template<> struct ReadHelper<const char*> { static bool Read(Value& val, const char*& out) {
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return val.IsString() ? (out = val.GetString(), true) : false;
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}};
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template<> struct ReadHelper<std::string> { static bool Read(Value& val, std::string& out) {
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return val.IsString() ? (out = std::string(val.GetString(), val.GetStringLength()), true) : false;
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}};
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template<class T> struct ReadHelper< Nullable<T> > { static bool Read(Value& val, Nullable<T>& out) {
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return out.isPresent = ReadHelper<T>::Read(val, out.value);
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}};
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template<class T>
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inline static bool ReadValue(Value& val, T& out)
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{
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return ReadHelper<T>::Read(val, out);
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}
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template<class T>
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inline static bool ReadMember(Value& obj, const char* id, T& out)
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{
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Value::MemberIterator it = obj.FindMember(id);
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if (it != obj.MemberEnd()) {
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return ReadHelper<T>::Read(it->value, out);
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}
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return false;
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}
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template<class T>
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inline static T MemberOrDefault(Value& obj, const char* id, T defaultValue)
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{
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T out;
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return ReadMember(obj, id, out) ? out : defaultValue;
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}
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inline Value* FindMember(Value& val, const char* id)
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{
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Value::MemberIterator it = val.FindMember(id);
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return (it != val.MemberEnd()) ? &it->value : 0;
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}
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inline Value* FindString(Value& val, const char* id)
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{
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Value::MemberIterator it = val.FindMember(id);
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return (it != val.MemberEnd() && it->value.IsString()) ? &it->value : 0;
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}
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inline Value* FindNumber(Value& val, const char* id)
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{
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Value::MemberIterator it = val.FindMember(id);
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return (it != val.MemberEnd() && it->value.IsNumber()) ? &it->value : 0;
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}
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inline Value* FindArray(Value& val, const char* id)
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{
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Value::MemberIterator it = val.FindMember(id);
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return (it != val.MemberEnd() && it->value.IsArray()) ? &it->value : 0;
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}
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inline Value* FindObject(Value& val, const char* id)
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{
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Value::MemberIterator it = val.FindMember(id);
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return (it != val.MemberEnd() && it->value.IsObject()) ? &it->value : 0;
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}
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}
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//
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// LazyDict methods
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//
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template<class T>
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inline LazyDict<T>::LazyDict(Asset& asset, const char* dictId, const char* extId)
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: mDictId(dictId), mExtId(extId), mDict(0), mAsset(asset)
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{
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asset.mDicts.push_back(this); // register to the list of dictionaries
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}
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template<class T>
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inline LazyDict<T>::~LazyDict()
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{
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for (size_t i = 0; i < mObjs.size(); ++i) {
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delete mObjs[i];
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}
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}
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template<class T>
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inline void LazyDict<T>::AttachToDocument(Document& doc)
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{
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Value* container = 0;
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if (mExtId) {
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if (Value* exts = FindObject(doc, "extensions")) {
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container = FindObject(*exts, mExtId);
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}
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}
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else {
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container = &doc;
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}
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if (container) {
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mDict = FindObject(*container, mDictId);
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}
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}
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template<class T>
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inline void LazyDict<T>::DetachFromDocument()
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{
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mDict = 0;
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}
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template<class T>
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Ref<T> LazyDict<T>::Get(unsigned int i)
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{
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return Ref<T>(mObjs, i);
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}
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template<class T>
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Ref<T> LazyDict<T>::Get(const char* id)
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{
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id = T::TranslateId(mAsset, id);
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typename Dict::iterator it = mObjsById.find(id);
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if (it != mObjsById.end()) { // already created?
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return Ref<T>(mObjs, it->second);
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}
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// read it from the JSON object
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if (!mDict) {
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throw DeadlyImportError("GLTF: Missing section \"" + std::string(mDictId) + "\"");
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}
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Value::MemberIterator obj = mDict->FindMember(id);
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if (obj == mDict->MemberEnd()) {
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throw DeadlyImportError("GLTF: Missing object with id \"" + std::string(id) + "\" in \"" + mDictId + "\"");
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}
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if (!obj->value.IsObject()) {
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throw DeadlyImportError("GLTF: Object with id \"" + std::string(id) + "\" is not a JSON object");
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}
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// create an instance of the given type
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T* inst = new T();
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inst->id = id;
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ReadMember(obj->value, "name", inst->name);
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inst->Read(obj->value, mAsset);
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return Add(inst);
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}
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template<class T>
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Ref<T> LazyDict<T>::Add(T* obj)
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{
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unsigned int idx = unsigned(mObjs.size());
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mObjs.push_back(obj);
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mObjsById[obj->id] = idx;
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mAsset.mUsedIds[obj->id] = true;
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return Ref<T>(mObjs, idx);
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}
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template<class T>
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Ref<T> LazyDict<T>::Create(const char* id)
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{
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Asset::IdMap::iterator it = mAsset.mUsedIds.find(id);
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if (it != mAsset.mUsedIds.end()) {
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throw DeadlyImportError("GLTF: two objects with the same ID exist");
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}
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T* inst = new T();
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inst->id = id;
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return Add(inst);
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}
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//
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// glTF dictionary objects methods
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//
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inline Buffer::Buffer()
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: byteLength(0), type(Type_arraybuffer), EncodedRegion_Current(nullptr), mIsSpecial(false)
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{ }
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inline Buffer::~Buffer()
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{
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for(SEncodedRegion* reg : EncodedRegion_List) delete reg;
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}
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inline const char* Buffer::TranslateId(Asset& r, const char* id)
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{
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// Compatibility with old spec
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if (r.extensionsUsed.KHR_binary_glTF && strcmp(id, "KHR_binary_glTF") == 0) {
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return "binary_glTF";
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}
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return id;
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}
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inline void Buffer::Read(Value& obj, Asset& r)
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{
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size_t statedLength = MemberOrDefault<size_t>(obj, "byteLength", 0);
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byteLength = statedLength;
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Value* it = FindString(obj, "uri");
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if (!it) {
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if (statedLength > 0) {
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throw DeadlyImportError("GLTF: buffer with non-zero length missing the \"uri\" attribute");
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}
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return;
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}
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const char* uri = it->GetString();
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Util::DataURI dataURI;
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if (ParseDataURI(uri, it->GetStringLength(), dataURI)) {
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if (dataURI.base64) {
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uint8_t* data = 0;
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this->byteLength = Util::DecodeBase64(dataURI.data, dataURI.dataLength, data);
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this->mData.reset(data);
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if (statedLength > 0 && this->byteLength != statedLength) {
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throw DeadlyImportError("GLTF: buffer \"" + id + "\", expected " + to_string(statedLength) +
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" bytes, but found " + to_string(dataURI.dataLength));
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}
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}
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else { // assume raw data
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if (statedLength != dataURI.dataLength) {
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throw DeadlyImportError("GLTF: buffer \"" + id + "\", expected " + to_string(statedLength) +
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" bytes, but found " + to_string(dataURI.dataLength));
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}
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this->mData.reset(new uint8_t[dataURI.dataLength]);
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memcpy( this->mData.get(), dataURI.data, dataURI.dataLength );
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}
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}
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else { // Local file
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if (byteLength > 0) {
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IOStream* file = r.OpenFile(uri, "rb");
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if (file) {
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bool ok = LoadFromStream(*file, byteLength);
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delete file;
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if (!ok)
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throw DeadlyImportError("GLTF: error while reading referenced file \"" + std::string(uri) + "\"" );
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}
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else {
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throw DeadlyImportError("GLTF: could not open referenced file \"" + std::string(uri) + "\"");
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}
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}
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}
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}
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inline bool Buffer::LoadFromStream(IOStream& stream, size_t length, size_t baseOffset)
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{
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byteLength = length ? length : stream.FileSize();
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if (baseOffset) {
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stream.Seek(baseOffset, aiOrigin_SET);
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}
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mData.reset(new uint8_t[byteLength]);
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if (stream.Read(mData.get(), byteLength, 1) != 1) {
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return false;
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}
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return true;
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}
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inline void Buffer::EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string& pID)
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{
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// Check pointer to data
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if(pDecodedData == nullptr) throw DeadlyImportError("GLTF: for marking encoded region pointer to decoded data must be provided.");
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// Check offset
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if(pOffset > byteLength)
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{
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const uint8_t val_size = 32;
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char val[val_size];
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ai_snprintf(val, val_size, "%llu", (long long)pOffset);
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throw DeadlyImportError(std::string("GLTF: incorrect offset value (") + val + ") for marking encoded region.");
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}
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// Check length
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if((pOffset + pEncodedData_Length) > byteLength)
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{
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const uint8_t val_size = 64;
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char val[val_size];
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ai_snprintf(val, val_size, "%llu, %llu", (long long)pOffset, (long long)pEncodedData_Length);
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throw DeadlyImportError(std::string("GLTF: encoded region with offset/length (") + val + ") is out of range.");
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}
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// Add new region
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EncodedRegion_List.push_back(new SEncodedRegion(pOffset, pEncodedData_Length, pDecodedData, pDecodedData_Length, pID));
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// And set new value for "byteLength"
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byteLength += (pDecodedData_Length - pEncodedData_Length);
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}
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inline void Buffer::EncodedRegion_SetCurrent(const std::string& pID)
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{
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if((EncodedRegion_Current != nullptr) && (EncodedRegion_Current->ID == pID)) return;
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for(SEncodedRegion* reg : EncodedRegion_List)
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{
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if(reg->ID == pID)
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{
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EncodedRegion_Current = reg;
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return;
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}
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}
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throw DeadlyImportError("GLTF: EncodedRegion with ID: \"" + pID + "\" not found.");
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}
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inline bool Buffer::ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count)
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{
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const size_t new_data_size = byteLength + pReplace_Count - pBufferData_Count;
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uint8_t* new_data;
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if((pBufferData_Count == 0) || (pReplace_Count == 0) || (pReplace_Data == nullptr)) return false;
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new_data = new uint8_t[new_data_size];
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// Copy data which place before replacing part.
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memcpy(new_data, mData.get(), pBufferData_Offset);
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// Copy new data.
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memcpy(&new_data[pBufferData_Offset], pReplace_Data, pReplace_Count);
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// Copy data which place after replacing part.
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memcpy(&new_data[pBufferData_Offset + pReplace_Count], &mData.get()[pBufferData_Offset + pBufferData_Count], pBufferData_Offset);
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// Apply new data
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mData.reset(new_data);
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byteLength = new_data_size;
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return true;
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}
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inline size_t Buffer::AppendData(uint8_t* data, size_t length)
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{
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size_t offset = this->byteLength;
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Grow(length);
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memcpy(mData.get() + offset, data, length);
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return offset;
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}
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inline void Buffer::Grow(size_t amount)
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{
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if (amount <= 0) return;
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uint8_t* b = new uint8_t[byteLength + amount];
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if (mData) memcpy(b, mData.get(), byteLength);
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mData.reset(b);
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byteLength += amount;
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}
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//
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// struct BufferView
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//
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inline void BufferView::Read(Value& obj, Asset& r)
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{
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const char* bufferId = MemberOrDefault<const char*>(obj, "buffer", 0);
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if (bufferId) {
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buffer = r.buffers.Get(bufferId);
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}
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byteOffset = MemberOrDefault(obj, "byteOffset", 0u);
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byteLength = MemberOrDefault(obj, "byteLength", 0u);
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}
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//
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// struct Accessor
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//
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inline void Accessor::Read(Value& obj, Asset& r)
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{
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const char* bufferViewId = MemberOrDefault<const char*>(obj, "bufferView", 0);
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if (bufferViewId) {
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bufferView = r.bufferViews.Get(bufferViewId);
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}
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byteOffset = MemberOrDefault(obj, "byteOffset", 0u);
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byteStride = MemberOrDefault(obj, "byteStride", 0u);
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componentType = MemberOrDefault(obj, "componentType", ComponentType_BYTE);
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count = MemberOrDefault(obj, "count", 0u);
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const char* typestr;
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type = ReadMember(obj, "type", typestr) ? AttribType::FromString(typestr) : AttribType::SCALAR;
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}
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inline unsigned int Accessor::GetNumComponents()
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{
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return AttribType::GetNumComponents(type);
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}
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inline unsigned int Accessor::GetBytesPerComponent()
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{
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return int(ComponentTypeSize(componentType));
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}
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inline unsigned int Accessor::GetElementSize()
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{
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return GetNumComponents() * GetBytesPerComponent();
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}
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inline uint8_t* Accessor::GetPointer()
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{
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if (!bufferView || !bufferView->buffer) return 0;
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uint8_t* basePtr = bufferView->buffer->GetPointer();
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if (!basePtr) return 0;
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size_t offset = byteOffset + bufferView->byteOffset;
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// Check if region is encoded.
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if(bufferView->buffer->EncodedRegion_Current != nullptr)
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{
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const size_t begin = bufferView->buffer->EncodedRegion_Current->Offset;
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const size_t end = begin + bufferView->buffer->EncodedRegion_Current->DecodedData_Length;
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if((offset >= begin) && (offset < end))
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return &bufferView->buffer->EncodedRegion_Current->DecodedData[offset - begin];
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}
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return basePtr + offset;
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}
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namespace {
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inline void CopyData(size_t count,
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|
const uint8_t* src, size_t src_stride,
|
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uint8_t* dst, size_t dst_stride)
|
|
{
|
|
if (src_stride == dst_stride) {
|
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memcpy(dst, src, count * src_stride);
|
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}
|
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else {
|
|
size_t sz = std::min(src_stride, dst_stride);
|
|
for (size_t i = 0; i < count; ++i) {
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memcpy(dst, src, sz);
|
|
if (sz < dst_stride) {
|
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memset(dst + sz, 0, dst_stride - sz);
|
|
}
|
|
src += src_stride;
|
|
dst += dst_stride;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
bool Accessor::ExtractData(T*& outData)
|
|
{
|
|
uint8_t* data = GetPointer();
|
|
if (!data) return false;
|
|
|
|
const size_t elemSize = GetElementSize();
|
|
const size_t totalSize = elemSize * count;
|
|
|
|
const size_t stride = byteStride ? byteStride : elemSize;
|
|
|
|
const size_t targetElemSize = sizeof(T);
|
|
ai_assert(elemSize <= targetElemSize);
|
|
|
|
ai_assert(count*stride <= bufferView->byteLength);
|
|
|
|
outData = new T[count];
|
|
if (stride == elemSize && targetElemSize == elemSize) {
|
|
memcpy(outData, data, totalSize);
|
|
}
|
|
else {
|
|
for (size_t i = 0; i < count; ++i) {
|
|
memcpy(outData + i, data + i*stride, elemSize);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
inline void Accessor::WriteData(size_t count, const void* src_buffer, size_t src_stride)
|
|
{
|
|
uint8_t* buffer_ptr = bufferView->buffer->GetPointer();
|
|
size_t offset = byteOffset + bufferView->byteOffset;
|
|
|
|
size_t dst_stride = GetNumComponents() * GetBytesPerComponent();
|
|
|
|
const uint8_t* src = reinterpret_cast<const uint8_t*>(src_buffer);
|
|
uint8_t* dst = reinterpret_cast< uint8_t*>(buffer_ptr + offset);
|
|
|
|
ai_assert(dst + count*dst_stride <= buffer_ptr + bufferView->buffer->byteLength);
|
|
CopyData(count, src, src_stride, dst, dst_stride);
|
|
}
|
|
|
|
|
|
|
|
inline Accessor::Indexer::Indexer(Accessor& acc)
|
|
: accessor(acc)
|
|
, data(acc.GetPointer())
|
|
, elemSize(acc.GetElementSize())
|
|
, stride(acc.byteStride ? acc.byteStride : elemSize)
|
|
{
|
|
|
|
}
|
|
|
|
//! Accesses the i-th value as defined by the accessor
|
|
template<class T>
|
|
T Accessor::Indexer::GetValue(int i)
|
|
{
|
|
ai_assert(data);
|
|
ai_assert(i*stride < accessor.bufferView->byteLength);
|
|
T value = T();
|
|
memcpy(&value, data + i*stride, elemSize);
|
|
//value >>= 8 * (sizeof(T) - elemSize);
|
|
return value;
|
|
}
|
|
|
|
inline Image::Image()
|
|
: width(0)
|
|
, height(0)
|
|
, mData(0)
|
|
, mDataLength(0)
|
|
{
|
|
|
|
}
|
|
|
|
inline void Image::Read(Value& obj, Asset& r)
|
|
{
|
|
// Check for extensions first (to detect binary embedded data)
|
|
if (Value* extensions = FindObject(obj, "extensions")) {
|
|
if (r.extensionsUsed.KHR_binary_glTF) {
|
|
if (Value* ext = FindObject(*extensions, "KHR_binary_glTF")) {
|
|
|
|
width = MemberOrDefault(*ext, "width", 0);
|
|
height = MemberOrDefault(*ext, "height", 0);
|
|
|
|
ReadMember(*ext, "mimeType", mimeType);
|
|
|
|
const char* bufferViewId;
|
|
if (ReadMember(*ext, "bufferView", bufferViewId)) {
|
|
Ref<BufferView> bv = r.bufferViews.Get(bufferViewId);
|
|
if (bv) {
|
|
mDataLength = bv->byteLength;
|
|
mData = new uint8_t[mDataLength];
|
|
memcpy(mData, bv->buffer->GetPointer() + bv->byteOffset, mDataLength);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!mDataLength) {
|
|
if (Value* uri = FindString(obj, "uri")) {
|
|
const char* uristr = uri->GetString();
|
|
|
|
Util::DataURI dataURI;
|
|
if (ParseDataURI(uristr, uri->GetStringLength(), dataURI)) {
|
|
mimeType = dataURI.mediaType;
|
|
if (dataURI.base64) {
|
|
mDataLength = Util::DecodeBase64(dataURI.data, dataURI.dataLength, mData);
|
|
}
|
|
}
|
|
else {
|
|
this->uri = uristr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline uint8_t* Image::StealData()
|
|
{
|
|
uint8_t* data = mData;
|
|
mDataLength = 0;
|
|
mData = 0;
|
|
return data;
|
|
}
|
|
|
|
inline void Image::SetData(uint8_t* data, size_t length, Asset& r)
|
|
{
|
|
Ref<Buffer> b = r.GetBodyBuffer();
|
|
if (b) { // binary file: append to body
|
|
std::string bvId = r.FindUniqueID(this->id, "imgdata");
|
|
bufferView = r.bufferViews.Create(bvId);
|
|
|
|
bufferView->buffer = b;
|
|
bufferView->byteLength = length;
|
|
bufferView->byteOffset = b->AppendData(data, length);
|
|
}
|
|
else { // text file: will be stored as a data uri
|
|
this->mData = data;
|
|
this->mDataLength = length;
|
|
}
|
|
}
|
|
|
|
inline void Sampler::Read(Value& obj, Asset& r)
|
|
{
|
|
SetDefaults();
|
|
|
|
ReadMember(obj, "magFilter", magFilter);
|
|
ReadMember(obj, "minFilter", minFilter);
|
|
ReadMember(obj, "wrapS", wrapS);
|
|
ReadMember(obj, "wrapT", wrapT);
|
|
}
|
|
|
|
inline void Sampler::SetDefaults()
|
|
{
|
|
magFilter = SamplerMagFilter_Linear;
|
|
minFilter = SamplerMinFilter_Linear;
|
|
wrapS = SamplerWrap_Repeat;
|
|
wrapT = SamplerWrap_Repeat;
|
|
}
|
|
|
|
inline void Texture::Read(Value& obj, Asset& r)
|
|
{
|
|
const char* sourcestr;
|
|
if (ReadMember(obj, "source", sourcestr)) {
|
|
source = r.images.Get(sourcestr);
|
|
}
|
|
|
|
const char* samplerstr;
|
|
if (ReadMember(obj, "sampler", samplerstr)) {
|
|
sampler = r.samplers.Get(samplerstr);
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
inline void ReadMaterialProperty(Asset& r, Value& vals, const char* propName, TexProperty& out)
|
|
{
|
|
if (Value* prop = FindMember(vals, propName)) {
|
|
if (prop->IsString()) {
|
|
out.texture = r.textures.Get(prop->GetString());
|
|
}
|
|
else {
|
|
ReadValue(*prop, out.color);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void Material::Read(Value& material, Asset& r)
|
|
{
|
|
SetDefaults();
|
|
|
|
if (Value* values = FindObject(material, "values")) {
|
|
ReadMaterialProperty(r, *values, "ambient", this->ambient);
|
|
ReadMaterialProperty(r, *values, "diffuse", this->diffuse);
|
|
ReadMaterialProperty(r, *values, "specular", this->specular);
|
|
|
|
ReadMember(*values, "transparency", transparency);
|
|
ReadMember(*values, "shininess", shininess);
|
|
}
|
|
|
|
if (Value* extensions = FindObject(material, "extensions")) {
|
|
if (r.extensionsUsed.KHR_materials_common) {
|
|
if (Value* ext = FindObject(*extensions, "KHR_materials_common")) {
|
|
if (Value* tnq = FindString(*ext, "technique")) {
|
|
const char* t = tnq->GetString();
|
|
if (strcmp(t, "BLINN") == 0) technique = Technique_BLINN;
|
|
else if (strcmp(t, "PHONG") == 0) technique = Technique_PHONG;
|
|
else if (strcmp(t, "LAMBERT") == 0) technique = Technique_LAMBERT;
|
|
else if (strcmp(t, "CONSTANT") == 0) technique = Technique_CONSTANT;
|
|
}
|
|
|
|
if (Value* values = FindObject(*ext, "values")) {
|
|
ReadMaterialProperty(r, *values, "ambient", this->ambient);
|
|
ReadMaterialProperty(r, *values, "diffuse", this->diffuse);
|
|
ReadMaterialProperty(r, *values, "specular", this->specular);
|
|
|
|
ReadMember(*values, "doubleSided", doubleSided);
|
|
ReadMember(*values, "transparent", transparent);
|
|
ReadMember(*values, "transparency", transparency);
|
|
ReadMember(*values, "shininess", shininess);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
void SetVector(vec4& v, float x, float y, float z, float w)
|
|
{ v[0] = x; v[1] = y; v[2] = z; v[3] = w; }
|
|
}
|
|
|
|
inline void Material::SetDefaults()
|
|
{
|
|
SetVector(ambient.color, 0, 0, 0, 1);
|
|
SetVector(diffuse.color, 0, 0, 0, 1);
|
|
SetVector(specular.color, 0, 0, 0, 1);
|
|
SetVector(emission.color, 0, 0, 0, 1);
|
|
|
|
doubleSided = false;
|
|
transparent = false;
|
|
transparency = 1.0;
|
|
shininess = 0.0;
|
|
|
|
technique = Technique_undefined;
|
|
}
|
|
|
|
namespace {
|
|
|
|
template<int N>
|
|
inline int Compare(const char* attr, const char (&str)[N]) {
|
|
return (strncmp(attr, str, N - 1) == 0) ? N - 1 : 0;
|
|
}
|
|
|
|
inline bool GetAttribVector(Mesh::Primitive& p, const char* attr, Mesh::AccessorList*& v, int& pos)
|
|
{
|
|
if ((pos = Compare(attr, "POSITION"))) {
|
|
v = &(p.attributes.position);
|
|
}
|
|
else if ((pos = Compare(attr, "NORMAL"))) {
|
|
v = &(p.attributes.normal);
|
|
}
|
|
else if ((pos = Compare(attr, "TEXCOORD"))) {
|
|
v = &(p.attributes.texcoord);
|
|
}
|
|
else if ((pos = Compare(attr, "COLOR"))) {
|
|
v = &(p.attributes.color);
|
|
}
|
|
else if ((pos = Compare(attr, "JOINT"))) {
|
|
v = &(p.attributes.joint);
|
|
}
|
|
else if ((pos = Compare(attr, "JOINTMATRIX"))) {
|
|
v = &(p.attributes.jointmatrix);
|
|
}
|
|
else if ((pos = Compare(attr, "WEIGHT"))) {
|
|
v = &(p.attributes.weight);
|
|
}
|
|
else return false;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
inline void Mesh::Read(Value& pJSON_Object, Asset& pAsset_Root)
|
|
{
|
|
/****************** Mesh primitives ******************/
|
|
if (Value* primitives = FindArray(pJSON_Object, "primitives")) {
|
|
this->primitives.resize(primitives->Size());
|
|
for (unsigned int i = 0; i < primitives->Size(); ++i) {
|
|
Value& primitive = (*primitives)[i];
|
|
|
|
Primitive& prim = this->primitives[i];
|
|
prim.mode = MemberOrDefault(primitive, "mode", PrimitiveMode_TRIANGLES);
|
|
|
|
if (Value* attrs = FindObject(primitive, "attributes")) {
|
|
for (Value::MemberIterator it = attrs->MemberBegin(); it != attrs->MemberEnd(); ++it) {
|
|
if (!it->value.IsString()) continue;
|
|
const char* attr = it->name.GetString();
|
|
// Valid attribute semantics include POSITION, NORMAL, TEXCOORD, COLOR, JOINT, JOINTMATRIX,
|
|
// and WEIGHT.Attribute semantics can be of the form[semantic]_[set_index], e.g., TEXCOORD_0, TEXCOORD_1, etc.
|
|
|
|
int undPos = 0;
|
|
Mesh::AccessorList* vec = 0;
|
|
if (GetAttribVector(prim, attr, vec, undPos)) {
|
|
size_t idx = (attr[undPos] == '_') ? atoi(attr + undPos + 1) : 0;
|
|
if ((*vec).size() <= idx) (*vec).resize(idx + 1);
|
|
(*vec)[idx] = pAsset_Root.accessors.Get(it->value.GetString());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Value* indices = FindString(primitive, "indices")) {
|
|
prim.indices = pAsset_Root.accessors.Get(indices->GetString());
|
|
}
|
|
|
|
if (Value* material = FindString(primitive, "material")) {
|
|
prim.material = pAsset_Root.materials.Get(material->GetString());
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************** Mesh extensions ******************/
|
|
Value* json_extensions = FindObject(pJSON_Object, "extensions");
|
|
|
|
if(json_extensions == nullptr) goto mr_skip_extensions;
|
|
|
|
for(Value::MemberIterator it_memb = json_extensions->MemberBegin(); it_memb != json_extensions->MemberEnd(); it_memb++)
|
|
{
|
|
#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
|
|
if(it_memb->name.GetString() == std::string("Open3DGC-compression"))
|
|
{
|
|
// Search for compressed data.
|
|
// Compressed data contain description of part of "buffer" which is encoded. This part must be decoded and
|
|
// new data will replace old encoded part by request. In fact \"compressedData\" is kind of "accessor" structure.
|
|
Value* comp_data = FindObject(it_memb->value, "compressedData");
|
|
|
|
if(comp_data == nullptr) throw DeadlyImportError("GLTF: \"Open3DGC-compression\" must has \"compressedData\".");
|
|
|
|
DefaultLogger::get()->info("GLTF: Decompressing Open3DGC data.");
|
|
|
|
/************** Read data from JSON-document **************/
|
|
#define MESH_READ_COMPRESSEDDATA_MEMBER(pFieldName, pOut) \
|
|
if(!ReadMember(*comp_data, pFieldName, pOut)) \
|
|
{ \
|
|
throw DeadlyImportError(std::string("GLTF: \"compressedData\" must has \"") + pFieldName + "\"."); \
|
|
}
|
|
|
|
const char* mode_str;
|
|
const char* type_str;
|
|
ComponentType component_type;
|
|
SCompression_Open3DGC* ext_o3dgc = new SCompression_Open3DGC;
|
|
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("buffer", ext_o3dgc->Buffer);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("byteOffset", ext_o3dgc->Offset);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("componentType", component_type);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("type", type_str);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("count", ext_o3dgc->Count);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("mode", mode_str);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("indicesCount", ext_o3dgc->IndicesCount);
|
|
MESH_READ_COMPRESSEDDATA_MEMBER("verticesCount", ext_o3dgc->VerticesCount);
|
|
|
|
#undef MESH_READ_COMPRESSEDDATA_MEMBER
|
|
|
|
// Check some values
|
|
if(strcmp(type_str, "SCALAR")) throw DeadlyImportError("GLTF: only \"SCALAR\" type is supported for compressed data.");
|
|
if(component_type != ComponentType_UNSIGNED_BYTE) throw DeadlyImportError("GLTF: only \"UNSIGNED_BYTE\" component type is supported for compressed data.");
|
|
|
|
// Set read/write data mode.
|
|
if(strcmp(mode_str, "binary") == 0)
|
|
ext_o3dgc->Binary = true;
|
|
else if(strcmp(mode_str, "ascii") == 0)
|
|
ext_o3dgc->Binary = false;
|
|
else
|
|
throw DeadlyImportError(std::string("GLTF: for compressed data supported modes is: \"ascii\", \"binary\". Not the: \"") + mode_str + "\".");
|
|
|
|
/************************ Decoding ************************/
|
|
Decode_O3DGC(*ext_o3dgc, pAsset_Root);
|
|
Extension.push_back(ext_o3dgc);// store info in mesh extensions list.
|
|
}// if(it_memb->name.GetString() == "Open3DGC-compression")
|
|
else
|
|
#endif
|
|
{
|
|
throw DeadlyImportError(std::string("GLTF: Unknown mesh extension: \"") + it_memb->name.GetString() + "\".");
|
|
}
|
|
}// for(Value::MemberIterator it_memb = json_extensions->MemberBegin(); it_memb != json_extensions->MemberEnd(); json_extensions++)
|
|
|
|
mr_skip_extensions:
|
|
|
|
return;// After label some operators must be present.
|
|
}
|
|
|
|
#ifdef ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC
|
|
inline void Mesh::Decode_O3DGC(const SCompression_Open3DGC& pCompression_Open3DGC, Asset& pAsset_Root)
|
|
{
|
|
typedef unsigned short IndicesType;///< \sa glTFExporter::ExportMeshes.
|
|
|
|
o3dgc::SC3DMCDecoder<IndicesType> decoder;
|
|
o3dgc::IndexedFaceSet<IndicesType> ifs;
|
|
o3dgc::BinaryStream bstream;
|
|
uint8_t* decoded_data;
|
|
size_t decoded_data_size = 0;
|
|
Ref<Buffer> buf = pAsset_Root.buffers.Get(pCompression_Open3DGC.Buffer);
|
|
|
|
// Read data from buffer and place it in BinaryStream for decoder.
|
|
// Just "Count" because always is used type equivalent to uint8_t.
|
|
bstream.LoadFromBuffer(&buf->GetPointer()[pCompression_Open3DGC.Offset], static_cast<unsigned long>(pCompression_Open3DGC.Count));
|
|
|
|
// After decoding header we can get size of primitives.
|
|
if(decoder.DecodeHeader(ifs, bstream) != o3dgc::O3DGC_OK) throw DeadlyImportError("GLTF: can not decode Open3DGC header.");
|
|
|
|
/****************** Get sizes of arrays and check sizes ******************/
|
|
// Note. See "Limitations for meshes when using Open3DGC-compression".
|
|
|
|
// Indices
|
|
size_t size_coordindex = ifs.GetNCoordIndex() * 3;// See float attributes note.
|
|
|
|
if(primitives[0].indices->count != size_coordindex)
|
|
throw DeadlyImportError("GLTF: Open3DGC. Compressed indices count (" + std::to_string(size_coordindex) +
|
|
") not equal to uncompressed (" + std::to_string(primitives[0].indices->count) + ").");
|
|
|
|
size_coordindex *= sizeof(IndicesType);
|
|
// Coordinates
|
|
size_t size_coord = ifs.GetNCoord();// See float attributes note.
|
|
|
|
if(primitives[0].attributes.position[0]->count != size_coord)
|
|
throw DeadlyImportError("GLTF: Open3DGC. Compressed positions count (" + std::to_string(size_coord) +
|
|
") not equal to uncompressed (" + std::to_string(primitives[0].attributes.position[0]->count) + ").");
|
|
|
|
size_coord *= 3 * sizeof(float);
|
|
// Normals
|
|
size_t size_normal = ifs.GetNNormal();// See float attributes note.
|
|
|
|
if(primitives[0].attributes.normal[0]->count != size_normal)
|
|
throw DeadlyImportError("GLTF: Open3DGC. Compressed normals count (" + std::to_string(size_normal) +
|
|
") not equal to uncompressed (" + std::to_string(primitives[0].attributes.normal[0]->count) + ").");
|
|
|
|
size_normal *= 3 * sizeof(float);
|
|
// Additional attributes.
|
|
std::vector<size_t> size_floatattr;
|
|
std::vector<size_t> size_intattr;
|
|
|
|
size_floatattr.resize(ifs.GetNumFloatAttributes());
|
|
size_intattr.resize(ifs.GetNumIntAttributes());
|
|
|
|
decoded_data_size = size_coordindex + size_coord + size_normal;
|
|
for(size_t idx = 0, idx_end = size_floatattr.size(), idx_texcoord = 0; idx < idx_end; idx++)
|
|
{
|
|
// size = number_of_elements * components_per_element * size_of_component.
|
|
// Note. But as you can see above, at first we are use this variable in meaning "count". After checking count of objects...
|
|
size_t tval = ifs.GetNFloatAttribute(static_cast<unsigned long>(idx));
|
|
|
|
switch(ifs.GetFloatAttributeType(static_cast<unsigned long>(idx)))
|
|
{
|
|
case o3dgc::O3DGC_IFS_FLOAT_ATTRIBUTE_TYPE_TEXCOORD:
|
|
// Check situation when encoded data contain texture coordinates but primitive not.
|
|
if(idx_texcoord < primitives[0].attributes.texcoord.size())
|
|
{
|
|
if(primitives[0].attributes.texcoord[idx]->count != tval)
|
|
throw DeadlyImportError("GLTF: Open3DGC. Compressed texture coordinates count (" + std::to_string(tval) +
|
|
") not equal to uncompressed (" + std::to_string(primitives[0].attributes.texcoord[idx]->count) + ").");
|
|
|
|
idx_texcoord++;
|
|
}
|
|
else
|
|
{
|
|
ifs.SetNFloatAttribute(static_cast<unsigned long>(idx), 0ul);// Disable decoding this attribute.
|
|
}
|
|
|
|
break;
|
|
default:
|
|
throw DeadlyImportError("GLTF: Open3DGC. Unsupported type of float attribute: " + to_string(ifs.GetFloatAttributeType(static_cast<unsigned long>(idx))));
|
|
}
|
|
|
|
tval *= ifs.GetFloatAttributeDim(static_cast<unsigned long>(idx)) * sizeof(o3dgc::Real);// After checking count of objects we can get size of array.
|
|
size_floatattr[idx] = tval;
|
|
decoded_data_size += tval;
|
|
}
|
|
|
|
for(size_t idx = 0, idx_end = size_intattr.size(); idx < idx_end; idx++)
|
|
{
|
|
// size = number_of_elements * components_per_element * size_of_component. See float attributes note.
|
|
size_t tval = ifs.GetNIntAttribute(static_cast<unsigned long>(idx));
|
|
switch( ifs.GetIntAttributeType(static_cast<unsigned long>(idx) ) )
|
|
{
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_UNKOWN:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_INDEX:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_JOINT_ID:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_INDEX_BUFFER_ID:
|
|
break;
|
|
|
|
default:
|
|
throw DeadlyImportError("GLTF: Open3DGC. Unsupported type of int attribute: " + to_string(ifs.GetIntAttributeType(static_cast<unsigned long>(idx))));
|
|
}
|
|
|
|
tval *= ifs.GetIntAttributeDim(static_cast<unsigned long>(idx)) * sizeof(long);// See float attributes note.
|
|
size_intattr[idx] = tval;
|
|
decoded_data_size += tval;
|
|
}
|
|
|
|
// Create array for decoded data.
|
|
decoded_data = new uint8_t[decoded_data_size];
|
|
|
|
/****************** Set right array regions for decoder ******************/
|
|
|
|
auto get_buf_offset = [](Ref<Accessor>& pAccessor) -> size_t { return pAccessor->byteOffset + pAccessor->bufferView->byteOffset; };
|
|
|
|
// Indices
|
|
ifs.SetCoordIndex((IndicesType* const)(decoded_data + get_buf_offset(primitives[0].indices)));
|
|
// Coordinates
|
|
ifs.SetCoord((o3dgc::Real* const)(decoded_data + get_buf_offset(primitives[0].attributes.position[0])));
|
|
// Normals
|
|
if(size_normal)
|
|
{
|
|
ifs.SetNormal((o3dgc::Real* const)(decoded_data + get_buf_offset(primitives[0].attributes.normal[0])));
|
|
}
|
|
|
|
for(size_t idx = 0, idx_end = size_floatattr.size(), idx_texcoord = 0; idx < idx_end; idx++)
|
|
{
|
|
switch(ifs.GetFloatAttributeType(static_cast<unsigned long>(idx)))
|
|
{
|
|
case o3dgc::O3DGC_IFS_FLOAT_ATTRIBUTE_TYPE_TEXCOORD:
|
|
if(idx_texcoord < primitives[0].attributes.texcoord.size())
|
|
{
|
|
// See above about absent attributes.
|
|
ifs.SetFloatAttribute(static_cast<unsigned long>(idx), (o3dgc::Real* const)(decoded_data + get_buf_offset(primitives[0].attributes.texcoord[idx])));
|
|
idx_texcoord++;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
throw DeadlyImportError("GLTF: Open3DGC. Unsupported type of float attribute: " + to_string(ifs.GetFloatAttributeType(static_cast<unsigned long>(idx))));
|
|
}
|
|
}
|
|
|
|
for(size_t idx = 0, idx_end = size_intattr.size(); idx < idx_end; idx++) {
|
|
switch(ifs.GetIntAttributeType(static_cast<unsigned int>(idx))) {
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_UNKOWN:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_INDEX:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_JOINT_ID:
|
|
case o3dgc::O3DGC_IFS_INT_ATTRIBUTE_TYPE_INDEX_BUFFER_ID:
|
|
break;
|
|
|
|
// ifs.SetIntAttribute(idx, (long* const)(decoded_data + get_buf_offset(primitives[0].attributes.joint)));
|
|
default:
|
|
throw DeadlyImportError("GLTF: Open3DGC. Unsupported type of int attribute: " + to_string(ifs.GetIntAttributeType(static_cast<unsigned long>(idx))));
|
|
}
|
|
}
|
|
|
|
//
|
|
// Decode data
|
|
//
|
|
if ( decoder.DecodePayload( ifs, bstream ) != o3dgc::O3DGC_OK ) {
|
|
throw DeadlyImportError( "GLTF: can not decode Open3DGC data." );
|
|
}
|
|
|
|
// Set encoded region for "buffer".
|
|
buf->EncodedRegion_Mark(pCompression_Open3DGC.Offset, pCompression_Open3DGC.Count, decoded_data, decoded_data_size, id);
|
|
// No. Do not delete "output_data". After calling "EncodedRegion_Mark" bufferView is owner of "output_data".
|
|
// "delete [] output_data;"
|
|
}
|
|
#endif
|
|
|
|
inline void Camera::Read(Value& obj, Asset& r)
|
|
{
|
|
type = MemberOrDefault(obj, "type", Camera::Perspective);
|
|
|
|
const char* subobjId = (type == Camera::Orthographic) ? "ortographic" : "perspective";
|
|
|
|
Value* it = FindObject(obj, subobjId);
|
|
if (!it) throw DeadlyImportError("GLTF: Camera missing its parameters");
|
|
|
|
if (type == Camera::Perspective) {
|
|
perspective.aspectRatio = MemberOrDefault(*it, "aspectRatio", 0.f);
|
|
perspective.yfov = MemberOrDefault(*it, "yfov", 3.1415f/2.f);
|
|
perspective.zfar = MemberOrDefault(*it, "zfar", 100.f);
|
|
perspective.znear = MemberOrDefault(*it, "znear", 0.01f);
|
|
}
|
|
else {
|
|
ortographic.xmag = MemberOrDefault(obj, "xmag", 1.f);
|
|
ortographic.ymag = MemberOrDefault(obj, "ymag", 1.f);
|
|
ortographic.zfar = MemberOrDefault(obj, "zfar", 100.f);
|
|
ortographic.znear = MemberOrDefault(obj, "znear", 0.01f);
|
|
}
|
|
}
|
|
|
|
inline void Light::Read(Value& obj, Asset& r)
|
|
{
|
|
SetDefaults();
|
|
|
|
if (Value* type = FindString(obj, "type")) {
|
|
const char* t = type->GetString();
|
|
if (strcmp(t, "ambient") == 0) this->type = Type_ambient;
|
|
else if (strcmp(t, "directional") == 0) this->type = Type_directional;
|
|
else if (strcmp(t, "point") == 0) this->type = Type_point;
|
|
else if (strcmp(t, "spot") == 0) this->type = Type_spot;
|
|
|
|
if (this->type != Type_undefined) {
|
|
if (Value* vals = FindString(obj, t)) {
|
|
ReadMember(*vals, "color", color);
|
|
|
|
ReadMember(*vals, "constantAttenuation", constantAttenuation);
|
|
ReadMember(*vals, "linearAttenuation", linearAttenuation);
|
|
ReadMember(*vals, "quadraticAttenuation", quadraticAttenuation);
|
|
ReadMember(*vals, "distance", distance);
|
|
|
|
ReadMember(*vals, "falloffAngle", falloffAngle);
|
|
ReadMember(*vals, "falloffExponent", falloffExponent);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void Light::SetDefaults()
|
|
{
|
|
#ifndef M_PI
|
|
const float M_PI = 3.14159265358979323846f;
|
|
#endif
|
|
|
|
type = Type_undefined;
|
|
|
|
SetVector(color, 0.f, 0.f, 0.f, 1.f);
|
|
|
|
constantAttenuation = 0.f;
|
|
linearAttenuation = 1.f;
|
|
quadraticAttenuation = 1.f;
|
|
distance = 0.f;
|
|
|
|
falloffAngle = static_cast<float>(M_PI / 2.f);
|
|
falloffExponent = 0.f;
|
|
}
|
|
|
|
inline void Node::Read(Value& obj, Asset& r)
|
|
{
|
|
if (Value* children = FindArray(obj, "children")) {
|
|
this->children.reserve(children->Size());
|
|
for (unsigned int i = 0; i < children->Size(); ++i) {
|
|
Value& child = (*children)[i];
|
|
if (child.IsString()) {
|
|
// get/create the child node
|
|
Ref<Node> chn = r.nodes.Get(child.GetString());
|
|
if (chn) this->children.push_back(chn);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (Value* matrix = FindArray(obj, "matrix")) {
|
|
ReadValue(*matrix, this->matrix);
|
|
}
|
|
else {
|
|
ReadMember(obj, "translation", translation);
|
|
ReadMember(obj, "scale", scale);
|
|
ReadMember(obj, "rotation", rotation);
|
|
}
|
|
|
|
if (Value* meshes = FindArray(obj, "meshes")) {
|
|
unsigned numMeshes = (unsigned)meshes->Size();
|
|
|
|
std::vector<unsigned int> meshList;
|
|
|
|
this->meshes.reserve(numMeshes);
|
|
for (unsigned i = 0; i < numMeshes; ++i) {
|
|
if ((*meshes)[i].IsString()) {
|
|
Ref<Mesh> mesh = r.meshes.Get((*meshes)[i].GetString());
|
|
if (mesh) this->meshes.push_back(mesh);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Value* camera = FindString(obj, "camera")) {
|
|
this->camera = r.cameras.Get(camera->GetString());
|
|
if (this->camera)
|
|
this->camera->id = this->id;
|
|
}
|
|
|
|
// TODO load "skeletons", "skin", "jointName"
|
|
|
|
if (Value* extensions = FindObject(obj, "extensions")) {
|
|
if (r.extensionsUsed.KHR_materials_common) {
|
|
|
|
if (Value* ext = FindObject(*extensions, "KHR_materials_common")) {
|
|
if (Value* light = FindString(*ext, "light")) {
|
|
this->light = r.lights.Get(light->GetString());
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void Scene::Read(Value& obj, Asset& r)
|
|
{
|
|
if (Value* array = FindArray(obj, "nodes")) {
|
|
for (unsigned int i = 0; i < array->Size(); ++i) {
|
|
if (!(*array)[i].IsString()) continue;
|
|
Ref<Node> node = r.nodes.Get((*array)[i].GetString());
|
|
if (node)
|
|
this->nodes.push_back(node);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
inline void AssetMetadata::Read(Document& doc)
|
|
{
|
|
// read the version, etc.
|
|
if (Value* obj = FindObject(doc, "asset")) {
|
|
ReadMember(*obj, "copyright", copyright);
|
|
ReadMember(*obj, "generator", generator);
|
|
|
|
premultipliedAlpha = MemberOrDefault(*obj, "premultipliedAlpha", false);
|
|
|
|
if (Value* versionString = FindString(*obj, "version")) {
|
|
version = versionString->GetString();
|
|
} else if (Value* versionNumber = FindNumber (*obj, "version")) {
|
|
char buf[4];
|
|
|
|
ai_snprintf(buf, 4, "%.1f", versionNumber->GetDouble());
|
|
|
|
version = buf;
|
|
}
|
|
|
|
if (Value* profile = FindObject(*obj, "profile")) {
|
|
ReadMember(*profile, "api", this->profile.api);
|
|
ReadMember(*profile, "version", this->profile.version);
|
|
}
|
|
}
|
|
|
|
if (version.empty() || version[0] != '1') {
|
|
throw DeadlyImportError("GLTF: Unsupported glTF version: " + version);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// Asset methods implementation
|
|
//
|
|
|
|
inline void Asset::ReadBinaryHeader(IOStream& stream)
|
|
{
|
|
GLB_Header header;
|
|
if (stream.Read(&header, sizeof(header), 1) != 1) {
|
|
throw DeadlyImportError("GLTF: Unable to read the file header");
|
|
}
|
|
|
|
if (strncmp((char*)header.magic, AI_GLB_MAGIC_NUMBER, sizeof(header.magic)) != 0) {
|
|
throw DeadlyImportError("GLTF: Invalid binary glTF file");
|
|
}
|
|
|
|
AI_SWAP4(header.version);
|
|
asset.version = std::to_string(header.version);
|
|
if (header.version != 1) {
|
|
throw DeadlyImportError("GLTF: Unsupported binary glTF version");
|
|
}
|
|
|
|
AI_SWAP4(header.sceneFormat);
|
|
if (header.sceneFormat != SceneFormat_JSON) {
|
|
throw DeadlyImportError("GLTF: Unsupported binary glTF scene format");
|
|
}
|
|
|
|
AI_SWAP4(header.length);
|
|
AI_SWAP4(header.sceneLength);
|
|
|
|
mSceneLength = static_cast<size_t>(header.sceneLength);
|
|
|
|
mBodyOffset = sizeof(header)+mSceneLength;
|
|
mBodyOffset = (mBodyOffset + 3) & ~3; // Round up to next multiple of 4
|
|
|
|
mBodyLength = header.length - mBodyOffset;
|
|
}
|
|
|
|
inline void Asset::Load(const std::string& pFile, bool isBinary)
|
|
{
|
|
mCurrentAssetDir.clear();
|
|
int pos = std::max(int(pFile.rfind('/')), int(pFile.rfind('\\')));
|
|
if (pos != int(std::string::npos)) mCurrentAssetDir = pFile.substr(0, pos + 1);
|
|
|
|
shared_ptr<IOStream> stream(OpenFile(pFile.c_str(), "rb", true));
|
|
if (!stream) {
|
|
throw DeadlyImportError("GLTF: Could not open file for reading");
|
|
}
|
|
|
|
// is binary? then read the header
|
|
if (isBinary) {
|
|
SetAsBinary(); // also creates the body buffer
|
|
ReadBinaryHeader(*stream);
|
|
}
|
|
else {
|
|
mSceneLength = stream->FileSize();
|
|
mBodyLength = 0;
|
|
}
|
|
|
|
|
|
// read the scene data
|
|
|
|
std::vector<char> sceneData(mSceneLength + 1);
|
|
sceneData[mSceneLength] = '\0';
|
|
|
|
if (stream->Read(&sceneData[0], 1, mSceneLength) != mSceneLength) {
|
|
throw DeadlyImportError("GLTF: Could not read the file contents");
|
|
}
|
|
|
|
|
|
// parse the JSON document
|
|
|
|
Document doc;
|
|
doc.ParseInsitu(&sceneData[0]);
|
|
|
|
if (doc.HasParseError()) {
|
|
char buffer[32];
|
|
ai_snprintf(buffer, 32, "%d", static_cast<int>(doc.GetErrorOffset()));
|
|
throw DeadlyImportError(std::string("GLTF: JSON parse error, offset ") + buffer + ": "
|
|
+ GetParseError_En(doc.GetParseError()));
|
|
}
|
|
|
|
if (!doc.IsObject()) {
|
|
throw DeadlyImportError("GLTF: JSON document root must be a JSON object");
|
|
}
|
|
|
|
// Fill the buffer instance for the current file embedded contents
|
|
if (mBodyLength > 0) {
|
|
if (!mBodyBuffer->LoadFromStream(*stream, mBodyLength, mBodyOffset)) {
|
|
throw DeadlyImportError("GLTF: Unable to read gltf file");
|
|
}
|
|
}
|
|
|
|
|
|
// Load the metadata
|
|
asset.Read(doc);
|
|
ReadExtensionsUsed(doc);
|
|
|
|
// Prepare the dictionaries
|
|
for (size_t i = 0; i < mDicts.size(); ++i) {
|
|
mDicts[i]->AttachToDocument(doc);
|
|
}
|
|
|
|
|
|
|
|
// Read the "scene" property, which specifies which scene to load
|
|
// and recursively load everything referenced by it
|
|
if (Value* scene = FindString(doc, "scene")) {
|
|
this->scene = scenes.Get(scene->GetString());
|
|
}
|
|
|
|
// Clean up
|
|
for (size_t i = 0; i < mDicts.size(); ++i) {
|
|
mDicts[i]->DetachFromDocument();
|
|
}
|
|
}
|
|
|
|
inline void Asset::SetAsBinary()
|
|
{
|
|
if (!extensionsUsed.KHR_binary_glTF) {
|
|
extensionsUsed.KHR_binary_glTF = true;
|
|
mBodyBuffer = buffers.Create("binary_glTF");
|
|
mBodyBuffer->MarkAsSpecial();
|
|
}
|
|
}
|
|
|
|
|
|
inline void Asset::ReadExtensionsUsed(Document& doc)
|
|
{
|
|
Value* extsUsed = FindArray(doc, "extensionsUsed");
|
|
if (!extsUsed) return;
|
|
|
|
std::gltf_unordered_map<std::string, bool> exts;
|
|
|
|
for (unsigned int i = 0; i < extsUsed->Size(); ++i) {
|
|
if ((*extsUsed)[i].IsString()) {
|
|
exts[(*extsUsed)[i].GetString()] = true;
|
|
}
|
|
}
|
|
|
|
#define CHECK_EXT(EXT) \
|
|
if (exts.find(#EXT) != exts.end()) extensionsUsed.EXT = true;
|
|
|
|
CHECK_EXT(KHR_binary_glTF);
|
|
CHECK_EXT(KHR_materials_common);
|
|
|
|
#undef CHECK_EXT
|
|
}
|
|
|
|
inline IOStream* Asset::OpenFile(std::string path, const char* mode, bool absolute)
|
|
{
|
|
#ifdef ASSIMP_API
|
|
return mIOSystem->Open(path, mode);
|
|
#else
|
|
if (path.size() < 2) return 0;
|
|
if (!absolute && path[1] != ':' && path[0] != '/') { // relative?
|
|
path = mCurrentAssetDir + path;
|
|
}
|
|
FILE* f = fopen(path.c_str(), mode);
|
|
return f ? new IOStream(f) : 0;
|
|
#endif
|
|
}
|
|
|
|
inline std::string Asset::FindUniqueID(const std::string& str, const char* suffix)
|
|
{
|
|
std::string id = str;
|
|
|
|
if (!id.empty()) {
|
|
if (mUsedIds.find(id) == mUsedIds.end())
|
|
return id;
|
|
|
|
id += "_";
|
|
}
|
|
|
|
id += suffix;
|
|
|
|
Asset::IdMap::iterator it = mUsedIds.find(id);
|
|
if (it == mUsedIds.end())
|
|
return id;
|
|
|
|
char buffer[256];
|
|
int offset = ai_snprintf(buffer, sizeof(buffer), "%s_", id.c_str());
|
|
for (int i = 0; it != mUsedIds.end(); ++i) {
|
|
ai_snprintf(buffer + offset, sizeof(buffer) - offset, "%d", i);
|
|
id = buffer;
|
|
it = mUsedIds.find(id);
|
|
}
|
|
|
|
return id;
|
|
}
|
|
|
|
namespace Util {
|
|
|
|
inline
|
|
bool ParseDataURI(const char* const_uri, size_t uriLen, DataURI& out) {
|
|
if ( NULL == const_uri ) {
|
|
return false;
|
|
}
|
|
|
|
if (const_uri[0] != 0x10) { // we already parsed this uri?
|
|
if (strncmp(const_uri, "data:", 5) != 0) // not a data uri?
|
|
return false;
|
|
}
|
|
|
|
// set defaults
|
|
out.mediaType = "text/plain";
|
|
out.charset = "US-ASCII";
|
|
out.base64 = false;
|
|
|
|
char* uri = const_cast<char*>(const_uri);
|
|
if (uri[0] != 0x10) {
|
|
uri[0] = 0x10;
|
|
uri[1] = uri[2] = uri[3] = uri[4] = 0;
|
|
|
|
size_t i = 5, j;
|
|
if (uri[i] != ';' && uri[i] != ',') { // has media type?
|
|
uri[1] = char(i);
|
|
for (; uri[i] != ';' && uri[i] != ',' && i < uriLen; ++i) {
|
|
// nothing to do!
|
|
}
|
|
}
|
|
while (uri[i] == ';' && i < uriLen) {
|
|
uri[i++] = '\0';
|
|
for (j = i; uri[i] != ';' && uri[i] != ',' && i < uriLen; ++i) {
|
|
// nothing to do!
|
|
}
|
|
|
|
if ( strncmp( uri + j, "charset=", 8 ) == 0 ) {
|
|
uri[2] = char(j + 8);
|
|
} else if ( strncmp( uri + j, "base64", 6 ) == 0 ) {
|
|
uri[3] = char(j);
|
|
}
|
|
}
|
|
if (i < uriLen) {
|
|
uri[i++] = '\0';
|
|
uri[4] = char(i);
|
|
} else {
|
|
uri[1] = uri[2] = uri[3] = 0;
|
|
uri[4] = 5;
|
|
}
|
|
}
|
|
|
|
if ( uri[ 1 ] != 0 ) {
|
|
out.mediaType = uri + uri[ 1 ];
|
|
}
|
|
if ( uri[ 2 ] != 0 ) {
|
|
out.charset = uri + uri[ 2 ];
|
|
}
|
|
if ( uri[ 3 ] != 0 ) {
|
|
out.base64 = true;
|
|
}
|
|
out.data = uri + uri[4];
|
|
out.dataLength = (uri + uriLen) - out.data;
|
|
|
|
return true;
|
|
}
|
|
|
|
template<bool B>
|
|
struct DATA
|
|
{
|
|
static const uint8_t tableDecodeBase64[128];
|
|
};
|
|
|
|
template<bool B>
|
|
const uint8_t DATA<B>::tableDecodeBase64[128] = {
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63,
|
|
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 64, 0, 0,
|
|
0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
|
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0,
|
|
0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
|
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0
|
|
};
|
|
|
|
inline char EncodeCharBase64(uint8_t b)
|
|
{
|
|
return "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="[size_t(b)];
|
|
}
|
|
|
|
inline uint8_t DecodeCharBase64(char c)
|
|
{
|
|
return DATA<true>::tableDecodeBase64[size_t(c)]; // TODO faster with lookup table or ifs?
|
|
/*if (c >= 'A' && c <= 'Z') return c - 'A';
|
|
if (c >= 'a' && c <= 'z') return c - 'a' + 26;
|
|
if (c >= '0' && c <= '9') return c - '0' + 52;
|
|
if (c == '+') return 62;
|
|
if (c == '/') return 63;
|
|
return 64; // '-' */
|
|
}
|
|
|
|
inline size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out)
|
|
{
|
|
ai_assert(inLength % 4 == 0);
|
|
|
|
if (inLength < 4) {
|
|
out = 0;
|
|
return 0;
|
|
}
|
|
|
|
int nEquals = int(in[inLength - 1] == '=') +
|
|
int(in[inLength - 2] == '=');
|
|
|
|
size_t outLength = (inLength * 3) / 4 - nEquals;
|
|
out = new uint8_t[outLength];
|
|
memset(out, 0, outLength);
|
|
|
|
size_t i, j = 0;
|
|
|
|
for (i = 0; i + 4 < inLength; i += 4) {
|
|
uint8_t b0 = DecodeCharBase64(in[i]);
|
|
uint8_t b1 = DecodeCharBase64(in[i + 1]);
|
|
uint8_t b2 = DecodeCharBase64(in[i + 2]);
|
|
uint8_t b3 = DecodeCharBase64(in[i + 3]);
|
|
|
|
out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
|
|
out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
|
|
out[j++] = (uint8_t)((b2 << 6) | b3);
|
|
}
|
|
|
|
{
|
|
uint8_t b0 = DecodeCharBase64(in[i]);
|
|
uint8_t b1 = DecodeCharBase64(in[i + 1]);
|
|
uint8_t b2 = DecodeCharBase64(in[i + 2]);
|
|
uint8_t b3 = DecodeCharBase64(in[i + 3]);
|
|
|
|
out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
|
|
if (b2 < 64) out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
|
|
if (b3 < 64) out[j++] = (uint8_t)((b2 << 6) | b3);
|
|
}
|
|
|
|
return outLength;
|
|
}
|
|
|
|
|
|
|
|
inline void EncodeBase64(
|
|
const uint8_t* in, size_t inLength,
|
|
std::string& out)
|
|
{
|
|
size_t outLength = ((inLength + 2) / 3) * 4;
|
|
|
|
size_t j = out.size();
|
|
out.resize(j + outLength);
|
|
|
|
for (size_t i = 0; i < inLength; i += 3) {
|
|
uint8_t b = (in[i] & 0xFC) >> 2;
|
|
out[j++] = EncodeCharBase64(b);
|
|
|
|
b = (in[i] & 0x03) << 4;
|
|
if (i + 1 < inLength) {
|
|
b |= (in[i + 1] & 0xF0) >> 4;
|
|
out[j++] = EncodeCharBase64(b);
|
|
|
|
b = (in[i + 1] & 0x0F) << 2;
|
|
if (i + 2 < inLength) {
|
|
b |= (in[i + 2] & 0xC0) >> 6;
|
|
out[j++] = EncodeCharBase64(b);
|
|
|
|
b = in[i + 2] & 0x3F;
|
|
out[j++] = EncodeCharBase64(b);
|
|
}
|
|
else {
|
|
out[j++] = EncodeCharBase64(b);
|
|
out[j++] = '=';
|
|
}
|
|
}
|
|
else {
|
|
out[j++] = EncodeCharBase64(b);
|
|
out[j++] = '=';
|
|
out[j++] = '=';
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
} // ns glTF
|