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Diffstat (limited to 'src/3rdparty/assimp/code/glTF2Asset.inl')
| -rw-r--r-- | src/3rdparty/assimp/code/glTF2Asset.inl | 1449 |
1 files changed, 1449 insertions, 0 deletions
diff --git a/src/3rdparty/assimp/code/glTF2Asset.inl b/src/3rdparty/assimp/code/glTF2Asset.inl new file mode 100644 index 000000000..549df747e --- /dev/null +++ b/src/3rdparty/assimp/code/glTF2Asset.inl @@ -0,0 +1,1449 @@ +/* +Open Asset Import Library (assimp) +---------------------------------------------------------------------- + +Copyright (c) 2006-2017, assimp team + +All rights reserved. + +Redistribution and use of this software in source and binary forms, +with or without modification, are permitted provided that the +following conditions are met: + +* Redistributions of source code must retain the above +copyright notice, this list of conditions and the +following disclaimer. + +* Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the +following disclaimer in the documentation and/or other +materials provided with the distribution. + +* Neither the name of the assimp team, nor the names of its +contributors may be used to endorse or promote products +derived from this software without specific prior +written permission of the assimp team. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +---------------------------------------------------------------------- +*/ + +#include "StringUtils.h" + +// Header files, Assimp +#include <assimp/DefaultLogger.hpp> + +using namespace Assimp; + +namespace glTF2 { + +namespace { + + // + // JSON Value reading helpers + // + + template<class T> + struct ReadHelper { static bool Read(Value& val, T& out) { + return val.IsInt() ? out = static_cast<T>(val.GetInt()), true : false; + }}; + + template<> struct ReadHelper<bool> { static bool Read(Value& val, bool& out) { + return val.IsBool() ? out = val.GetBool(), true : false; + }}; + + template<> struct ReadHelper<float> { static bool Read(Value& val, float& out) { + return val.IsNumber() ? out = static_cast<float>(val.GetDouble()), true : false; + }}; + + template<unsigned int N> struct ReadHelper<float[N]> { static bool Read(Value& val, float (&out)[N]) { + if (!val.IsArray() || val.Size() != N) return false; + for (unsigned int i = 0; i < N; ++i) { + if (val[i].IsNumber()) + out[i] = static_cast<float>(val[i].GetDouble()); + } + return true; + }}; + + template<> struct ReadHelper<const char*> { static bool Read(Value& val, const char*& out) { + return val.IsString() ? (out = val.GetString(), true) : false; + }}; + + template<> struct ReadHelper<std::string> { static bool Read(Value& val, std::string& out) { + return val.IsString() ? (out = std::string(val.GetString(), val.GetStringLength()), true) : false; + }}; + + template<class T> struct ReadHelper< Nullable<T> > { static bool Read(Value& val, Nullable<T>& out) { + return out.isPresent = ReadHelper<T>::Read(val, out.value); + }}; + + template<class T> + inline static bool ReadValue(Value& val, T& out) + { + return ReadHelper<T>::Read(val, out); + } + + template<class T> + inline static bool ReadMember(Value& obj, const char* id, T& out) + { + Value::MemberIterator it = obj.FindMember(id); + if (it != obj.MemberEnd()) { + return ReadHelper<T>::Read(it->value, out); + } + return false; + } + + template<class T> + inline static T MemberOrDefault(Value& obj, const char* id, T defaultValue) + { + T out; + return ReadMember(obj, id, out) ? out : defaultValue; + } + + inline Value* FindMember(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd()) ? &it->value : 0; + } + + inline Value* FindString(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd() && it->value.IsString()) ? &it->value : 0; + } + + inline Value* FindNumber(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd() && it->value.IsNumber()) ? &it->value : 0; + } + + inline Value* FindUInt(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd() && it->value.IsUint()) ? &it->value : 0; + } + + inline Value* FindArray(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd() && it->value.IsArray()) ? &it->value : 0; + } + + inline Value* FindObject(Value& val, const char* id) + { + Value::MemberIterator it = val.FindMember(id); + return (it != val.MemberEnd() && it->value.IsObject()) ? &it->value : 0; + } +} + +// +// LazyDict methods +// + +template<class T> +inline LazyDict<T>::LazyDict(Asset& asset, const char* dictId, const char* extId) + : mDictId(dictId), mExtId(extId), mDict(0), mAsset(asset) +{ + asset.mDicts.push_back(this); // register to the list of dictionaries +} + +template<class T> +inline LazyDict<T>::~LazyDict() +{ + for (size_t i = 0; i < mObjs.size(); ++i) { + delete mObjs[i]; + } +} + + +template<class T> +inline void LazyDict<T>::AttachToDocument(Document& doc) +{ + Value* container = 0; + + if (mExtId) { + if (Value* exts = FindObject(doc, "extensions")) { + container = FindObject(*exts, mExtId); + } + } + else { + container = &doc; + } + + if (container) { + mDict = FindArray(*container, mDictId); + } +} + +template<class T> +inline void LazyDict<T>::DetachFromDocument() +{ + mDict = 0; +} + +template<class T> +unsigned int LazyDict<T>::Remove(const char* id) +{ + id = T::TranslateId(mAsset, id); + + typename IdDict::iterator it = mObjsById.find(id); + + if (it == mObjsById.end()) { + throw DeadlyExportError("GLTF: Object with id \"" + std::string(id) + "\" is not found"); + } + + const unsigned int index = it->second; + + mAsset.mUsedIds[id] = false; + mObjsById.erase(id); + mObjsByOIndex.erase(index); + mObjs.erase(mObjs.begin() + index); + + //update index of object in mObjs; + for (unsigned int i = index; i < mObjs.size(); ++i) { + T *obj = mObjs[i]; + + obj->index = i; + } + + for (IdDict::iterator it = mObjsById.begin(); it != mObjsById.end(); ++it) { + if (it->second <= index) { + continue; + } + + mObjsById[it->first] = it->second - 1; + } + + for (Dict::iterator it = mObjsByOIndex.begin(); it != mObjsByOIndex.end(); ++it) { + if (it->second <= index) { + continue; + } + + mObjsByOIndex[it->first] = it->second - 1; + } + + return index; +} + +template<class T> +Ref<T> LazyDict<T>::Retrieve(unsigned int i) +{ + + typename Dict::iterator it = mObjsByOIndex.find(i); + if (it != mObjsByOIndex.end()) {// already created? + return Ref<T>(mObjs, it->second); + } + + // read it from the JSON object + if (!mDict) { + throw DeadlyImportError("GLTF: Missing section \"" + std::string(mDictId) + "\""); + } + + if (!mDict->IsArray()) { + throw DeadlyImportError("GLTF: Field is not an array \"" + std::string(mDictId) + "\""); + } + + Value &obj = (*mDict)[i]; + + if (!obj.IsObject()) { + throw DeadlyImportError("GLTF: Object at index \"" + to_string(i) + "\" is not a JSON object"); + } + + T* inst = new T(); + inst->id = std::string(mDictId) + "_" + to_string(i); + inst->oIndex = i; + ReadMember(obj, "name", inst->name); + inst->Read(obj, mAsset); + + return Add(inst); +} + +template<class T> +Ref<T> LazyDict<T>::Get(unsigned int i) +{ + + return Ref<T>(mObjs, i); + +} + +template<class T> +Ref<T> LazyDict<T>::Get(const char* id) +{ + id = T::TranslateId(mAsset, id); + + typename IdDict::iterator it = mObjsById.find(id); + if (it != mObjsById.end()) { // already created? + return Ref<T>(mObjs, it->second); + } + + return Ref<T>(); +} + +template<class T> +Ref<T> LazyDict<T>::Add(T* obj) +{ + unsigned int idx = unsigned(mObjs.size()); + mObjs.push_back(obj); + mObjsByOIndex[obj->oIndex] = idx; + mObjsById[obj->id] = idx; + mAsset.mUsedIds[obj->id] = true; + return Ref<T>(mObjs, idx); +} + +template<class T> +Ref<T> LazyDict<T>::Create(const char* id) +{ + Asset::IdMap::iterator it = mAsset.mUsedIds.find(id); + if (it != mAsset.mUsedIds.end()) { + throw DeadlyImportError("GLTF: two objects with the same ID exist"); + } + T* inst = new T(); + unsigned int idx = unsigned(mObjs.size()); + inst->id = id; + inst->index = idx; + inst->oIndex = idx; + return Add(inst); +} + + +// +// glTF dictionary objects methods +// + + +inline Buffer::Buffer() + : byteLength(0), type(Type_arraybuffer), EncodedRegion_Current(nullptr), mIsSpecial(false) +{ } + +inline Buffer::~Buffer() +{ + for(SEncodedRegion* reg : EncodedRegion_List) delete reg; +} + +inline const char* Buffer::TranslateId(Asset& /*r*/, const char* id) +{ + return id; +} + +inline void Buffer::Read(Value& obj, Asset& r) +{ + size_t statedLength = MemberOrDefault<size_t>(obj, "byteLength", 0); + byteLength = statedLength; + + Value* it = FindString(obj, "uri"); + if (!it) { + if (statedLength > 0) { + throw DeadlyImportError("GLTF: buffer with non-zero length missing the \"uri\" attribute"); + } + return; + } + + const char* uri = it->GetString(); + + Util::DataURI dataURI; + if (ParseDataURI(uri, it->GetStringLength(), dataURI)) { + if (dataURI.base64) { + uint8_t* data = 0; + this->byteLength = Util::DecodeBase64(dataURI.data, dataURI.dataLength, data); + this->mData.reset(data, std::default_delete<uint8_t[]>()); + + if (statedLength > 0 && this->byteLength != statedLength) { + throw DeadlyImportError("GLTF: buffer \"" + id + "\", expected " + to_string(statedLength) + + " bytes, but found " + to_string(dataURI.dataLength)); + } + } + else { // assume raw data + if (statedLength != dataURI.dataLength) { + throw DeadlyImportError("GLTF: buffer \"" + id + "\", expected " + to_string(statedLength) + + " bytes, but found " + to_string(dataURI.dataLength)); + } + + this->mData.reset(new uint8_t[dataURI.dataLength], std::default_delete<uint8_t[]>()); + memcpy( this->mData.get(), dataURI.data, dataURI.dataLength ); + } + } + else { // Local file + if (byteLength > 0) { + std::string dir = !r.mCurrentAssetDir.empty() ? (r.mCurrentAssetDir + "/") : ""; + + IOStream* file = r.OpenFile(dir + uri, "rb"); + if (file) { + bool ok = LoadFromStream(*file, byteLength); + delete file; + + if (!ok) + throw DeadlyImportError("GLTF: error while reading referenced file \"" + std::string(uri) + "\"" ); + } + else { + throw DeadlyImportError("GLTF: could not open referenced file \"" + std::string(uri) + "\""); + } + } + } +} + +inline bool Buffer::LoadFromStream(IOStream& stream, size_t length, size_t baseOffset) +{ + byteLength = length ? length : stream.FileSize(); + + if (baseOffset) { + stream.Seek(baseOffset, aiOrigin_SET); + } + + mData.reset(new uint8_t[byteLength], std::default_delete<uint8_t[]>()); + + if (stream.Read(mData.get(), byteLength, 1) != 1) { + return false; + } + return true; +} + +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) +{ + // Check pointer to data + if(pDecodedData == nullptr) throw DeadlyImportError("GLTF: for marking encoded region pointer to decoded data must be provided."); + + // Check offset + if(pOffset > byteLength) + { + const uint8_t val_size = 32; + + char val[val_size]; + + ai_snprintf(val, val_size, "%llu", (long long)pOffset); + throw DeadlyImportError(std::string("GLTF: incorrect offset value (") + val + ") for marking encoded region."); + } + + // Check length + if((pOffset + pEncodedData_Length) > byteLength) + { + const uint8_t val_size = 64; + + char val[val_size]; + + ai_snprintf(val, val_size, "%llu, %llu", (long long)pOffset, (long long)pEncodedData_Length); + throw DeadlyImportError(std::string("GLTF: encoded region with offset/length (") + val + ") is out of range."); + } + + // Add new region + EncodedRegion_List.push_back(new SEncodedRegion(pOffset, pEncodedData_Length, pDecodedData, pDecodedData_Length, pID)); + // And set new value for "byteLength" + byteLength += (pDecodedData_Length - pEncodedData_Length); +} + +inline void Buffer::EncodedRegion_SetCurrent(const std::string& pID) +{ + if((EncodedRegion_Current != nullptr) && (EncodedRegion_Current->ID == pID)) return; + + for(SEncodedRegion* reg : EncodedRegion_List) + { + if(reg->ID == pID) + { + EncodedRegion_Current = reg; + + return; + } + + } + + throw DeadlyImportError("GLTF: EncodedRegion with ID: \"" + pID + "\" not found."); +} + +inline bool Buffer::ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count) +{ +const size_t new_data_size = byteLength + pReplace_Count - pBufferData_Count; + +uint8_t* new_data; + + if((pBufferData_Count == 0) || (pReplace_Count == 0) || (pReplace_Data == nullptr)) return false; + + new_data = new uint8_t[new_data_size]; + // Copy data which place before replacing part. + memcpy(new_data, mData.get(), pBufferData_Offset); + // Copy new data. + memcpy(&new_data[pBufferData_Offset], pReplace_Data, pReplace_Count); + // Copy data which place after replacing part. + memcpy(&new_data[pBufferData_Offset + pReplace_Count], &mData.get()[pBufferData_Offset + pBufferData_Count], pBufferData_Offset); + // Apply new data + mData.reset(new_data, std::default_delete<uint8_t[]>()); + byteLength = new_data_size; + + return true; +} + +inline size_t Buffer::AppendData(uint8_t* data, size_t length) +{ + size_t offset = this->byteLength; + Grow(length); + memcpy(mData.get() + offset, data, length); + return offset; +} + +inline void Buffer::Grow(size_t amount) +{ + if (amount <= 0) return; + uint8_t* b = new uint8_t[byteLength + amount]; + if (mData) memcpy(b, mData.get(), byteLength); + mData.reset(b, std::default_delete<uint8_t[]>()); + byteLength += amount; +} + +// +// struct BufferView +// + +inline void BufferView::Read(Value& obj, Asset& r) +{ + + if (Value* bufferVal = FindUInt(obj, "buffer")) { + buffer = r.buffers.Retrieve(bufferVal->GetUint()); + } + + byteOffset = MemberOrDefault(obj, "byteOffset", 0u); + byteLength = MemberOrDefault(obj, "byteLength", 0u); + byteStride = MemberOrDefault(obj, "byteStride", 0u); +} + +// +// struct Accessor +// + +inline void Accessor::Read(Value& obj, Asset& r) +{ + + if (Value* bufferViewVal = FindUInt(obj, "bufferView")) { + bufferView = r.bufferViews.Retrieve(bufferViewVal->GetUint()); + } + + byteOffset = MemberOrDefault(obj, "byteOffset", 0u); + componentType = MemberOrDefault(obj, "componentType", ComponentType_BYTE); + count = MemberOrDefault(obj, "count", 0u); + + const char* typestr; + type = ReadMember(obj, "type", typestr) ? AttribType::FromString(typestr) : AttribType::SCALAR; +} + +inline unsigned int Accessor::GetNumComponents() +{ + return AttribType::GetNumComponents(type); +} + +inline unsigned int Accessor::GetBytesPerComponent() +{ + return int(ComponentTypeSize(componentType)); +} + +inline unsigned int Accessor::GetElementSize() +{ + return GetNumComponents() * GetBytesPerComponent(); +} + +inline uint8_t* Accessor::GetPointer() +{ + if (!bufferView || !bufferView->buffer) return 0; + uint8_t* basePtr = bufferView->buffer->GetPointer(); + if (!basePtr) return 0; + + size_t offset = byteOffset + bufferView->byteOffset; + + // Check if region is encoded. + if(bufferView->buffer->EncodedRegion_Current != nullptr) + { + const size_t begin = bufferView->buffer->EncodedRegion_Current->Offset; + const size_t end = begin + bufferView->buffer->EncodedRegion_Current->DecodedData_Length; + + if((offset >= begin) && (offset < end)) + return &bufferView->buffer->EncodedRegion_Current->DecodedData[offset - begin]; + } + + return basePtr + offset; +} + +namespace { + inline void CopyData(size_t count, + const uint8_t* src, size_t src_stride, + uint8_t* dst, size_t dst_stride) + { + if (src_stride == dst_stride) { + memcpy(dst, src, count * src_stride); + } + else { + size_t sz = std::min(src_stride, dst_stride); + for (size_t i = 0; i < count; ++i) { + memcpy(dst, src, sz); + if (sz < dst_stride) { + 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 = bufferView && bufferView->byteStride ? bufferView->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.bufferView && acc.bufferView->byteStride ? acc.bufferView->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*/) +{ + 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, "name", name); + ReadMember(obj, "magFilter", magFilter); + ReadMember(obj, "minFilter", minFilter); + ReadMember(obj, "wrapS", wrapS); + ReadMember(obj, "wrapT", wrapT); +} + +inline void Sampler::SetDefaults() +{ + //only wrapping modes have defaults + wrapS = SamplerWrap::Repeat; + wrapT = SamplerWrap::Repeat; + magFilter = SamplerMagFilter::UNSET; + minFilter = SamplerMinFilter::UNSET; +} + +inline void Texture::Read(Value& obj, Asset& r) +{ + if (Value* sourceVal = FindUInt(obj, "source")) { + source = r.images.Retrieve(sourceVal->GetUint()); + } + + if (Value* samplerVal = FindUInt(obj, "sampler")) { + sampler = r.samplers.Retrieve(samplerVal->GetUint()); + } +} + +namespace { + inline void SetTextureProperties(Asset& r, Value* prop, TextureInfo& out) + { + if (Value* index = FindUInt(*prop, "index")) { + out.texture = r.textures.Retrieve(index->GetUint()); + } + + if (Value* texcoord = FindUInt(*prop, "texCoord")) { + out.texCoord = texcoord->GetUint(); + } + } + + inline void ReadTextureProperty(Asset& r, Value& vals, const char* propName, TextureInfo& out) + { + if (Value* prop = FindMember(vals, propName)) { + SetTextureProperties(r, prop, out); + } + } + + inline void ReadTextureProperty(Asset& r, Value& vals, const char* propName, NormalTextureInfo& out) + { + if (Value* prop = FindMember(vals, propName)) { + SetTextureProperties(r, prop, out); + + if (Value* scale = FindNumber(*prop, "scale")) { + out.scale = static_cast<float>(scale->GetDouble()); + } + } + } + + inline void ReadTextureProperty(Asset& r, Value& vals, const char* propName, OcclusionTextureInfo& out) + { + if (Value* prop = FindMember(vals, propName)) { + SetTextureProperties(r, prop, out); + + if (Value* strength = FindNumber(*prop, "strength")) { + out.strength = static_cast<float>(strength->GetDouble()); + } + } + } +} + +inline void Material::Read(Value& material, Asset& r) +{ + SetDefaults(); + + if (Value* pbrMetallicRoughness = FindObject(material, "pbrMetallicRoughness")) { + ReadMember(*pbrMetallicRoughness, "baseColorFactor", this->pbrMetallicRoughness.baseColorFactor); + ReadTextureProperty(r, *pbrMetallicRoughness, "baseColorTexture", this->pbrMetallicRoughness.baseColorTexture); + ReadTextureProperty(r, *pbrMetallicRoughness, "metallicRoughnessTexture", this->pbrMetallicRoughness.metallicRoughnessTexture); + ReadMember(*pbrMetallicRoughness, "metallicFactor", this->pbrMetallicRoughness.metallicFactor); + ReadMember(*pbrMetallicRoughness, "roughnessFactor", this->pbrMetallicRoughness.roughnessFactor); + } + + ReadTextureProperty(r, material, "normalTexture", this->normalTexture); + ReadTextureProperty(r, material, "occlusionTexture", this->occlusionTexture); + ReadTextureProperty(r, material, "emissiveTexture", this->emissiveTexture); + ReadMember(material, "emissiveFactor", this->emissiveFactor); + + ReadMember(material, "doubleSided", this->doubleSided); + ReadMember(material, "alphaMode", this->alphaMode); + ReadMember(material, "alphaCutoff", this->alphaCutoff); + + if (Value* extensions = FindObject(material, "extensions")) { + if (r.extensionsUsed.KHR_materials_pbrSpecularGlossiness) { + if (Value* pbrSpecularGlossiness = FindObject(*extensions, "KHR_materials_pbrSpecularGlossiness")) { + PbrSpecularGlossiness pbrSG; + + ReadMember(*pbrSpecularGlossiness, "diffuseFactor", pbrSG.diffuseFactor); + ReadTextureProperty(r, *pbrSpecularGlossiness, "diffuseTexture", pbrSG.diffuseTexture); + ReadTextureProperty(r, *pbrSpecularGlossiness, "specularGlossinessTexture", pbrSG.specularGlossinessTexture); + ReadMember(*pbrSpecularGlossiness, "specularFactor", pbrSG.specularFactor); + ReadMember(*pbrSpecularGlossiness, "glossinessFactor", pbrSG.glossinessFactor); + + this->pbrSpecularGlossiness = Nullable<PbrSpecularGlossiness>(pbrSG); + } + } + } +} + +namespace { + void SetVector(vec4& v, const float(&in)[4]) + { v[0] = in[0]; v[1] = in[1]; v[2] = in[2]; v[3] = in[3]; } + + void SetVector(vec3& v, const float(&in)[3]) + { v[0] = in[0]; v[1] = in[1]; v[2] = in[2]; } +} + +inline void Material::SetDefaults() +{ + //pbr materials + SetVector(pbrMetallicRoughness.baseColorFactor, defaultBaseColor); + pbrMetallicRoughness.metallicFactor = 1.0; + pbrMetallicRoughness.roughnessFactor = 1.0; + + SetVector(emissiveFactor, defaultEmissiveFactor); + alphaMode = "OPAQUE"; + alphaCutoff = 0.5; + doubleSided = false; +} + +inline void PbrSpecularGlossiness::SetDefaults() +{ + //pbrSpecularGlossiness properties + SetVector(diffuseFactor, defaultDiffuseFactor); + SetVector(specularFactor, defaultSpecularFactor); + glossinessFactor = 1.0; +} + +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, "TANGENT"))) { + v = &(p.attributes.tangent); + } + 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) +{ + if (Value* name = FindMember(pJSON_Object, "name")) { + this->name = name->GetString(); + } + + /****************** 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.IsUint()) continue; + const char* attr = it->name.GetString(); + // Valid attribute semantics include POSITION, NORMAL, TANGENT, 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.Retrieve(it->value.GetUint()); + } + } + } + + if (Value* indices = FindUInt(primitive, "indices")) { + prim.indices = pAsset_Root.accessors.Retrieve(indices->GetUint()); + } + + if (Value* material = FindUInt(primitive, "material")) { + prim.material = pAsset_Root.materials.Retrieve(material->GetUint()); + } + } + } +} + +inline void Camera::Read(Value& obj, Asset& /*r*/) +{ + type = MemberOrDefault(obj, "type", Camera::Perspective); + + const char* subobjId = (type == Camera::Orthographic) ? "orthographic" : "perspective"; + + Value* it = FindObject(obj, subobjId); + if (!it) throw DeadlyImportError("GLTF: Camera missing its parameters"); + + if (type == Camera::Perspective) { + cameraProperties.perspective.aspectRatio = MemberOrDefault(*it, "aspectRatio", 0.f); + cameraProperties.perspective.yfov = MemberOrDefault(*it, "yfov", 3.1415f/2.f); + cameraProperties.perspective.zfar = MemberOrDefault(*it, "zfar", 100.f); + cameraProperties.perspective.znear = MemberOrDefault(*it, "znear", 0.01f); + } + else { + cameraProperties.ortographic.xmag = MemberOrDefault(obj, "xmag", 1.f); + cameraProperties.ortographic.ymag = MemberOrDefault(obj, "ymag", 1.f); + cameraProperties.ortographic.zfar = MemberOrDefault(obj, "zfar", 100.f); + cameraProperties.ortographic.znear = MemberOrDefault(obj, "znear", 0.01f); + } +} + +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.IsUint()) { + // get/create the child node + Ref<Node> chn = r.nodes.Retrieve(child.GetUint()); + 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* mesh = FindUInt(obj, "mesh")) { + unsigned numMeshes = 1; + + this->meshes.reserve(numMeshes); + + Ref<Mesh> meshRef = r.meshes.Retrieve((*mesh).GetUint()); + + if (meshRef) this->meshes.push_back(meshRef); + } + + if (Value* camera = FindUInt(obj, "camera")) { + this->camera = r.cameras.Retrieve(camera->GetUint()); + if (this->camera) + this->camera->id = this->id; + } +} + +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].IsUint()) continue; + Ref<Node> node = r.nodes.Retrieve((*array)[i].GetUint()); + if (node) + this->nodes.push_back(node); + } + } +} + +inline void AssetMetadata::Read(Document& doc) +{ + if (Value* obj = FindObject(doc, "asset")) { + ReadMember(*obj, "copyright", copyright); + ReadMember(*obj, "generator", generator); + + 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] != '2') { + throw DeadlyImportError("GLTF: Unsupported glTF version: " + version); + } +} + +// +// Asset methods implementation +// + +inline void Asset::ReadBinaryHeader(IOStream& stream, std::vector<char>& sceneData) +{ + 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 = to_string(header.version); + if (header.version != 2) { + throw DeadlyImportError("GLTF: Unsupported binary glTF version"); + } + + GLB_Chunk chunk; + if (stream.Read(&chunk, sizeof(chunk), 1) != 1) { + throw DeadlyImportError("GLTF: Unable to read JSON chunk"); + } + + AI_SWAP4(chunk.chunkLength); + AI_SWAP4(chunk.chunkType); + + if (chunk.chunkType != ChunkType_JSON) { + throw DeadlyImportError("GLTF: JSON chunk missing"); + } + + // read the scene data + + mSceneLength = chunk.chunkLength; + sceneData.resize(mSceneLength + 1); + sceneData[mSceneLength] = '\0'; + + if (stream.Read(&sceneData[0], 1, mSceneLength) != mSceneLength) { + throw DeadlyImportError("GLTF: Could not read the file contents"); + } + + uint32_t padding = ((chunk.chunkLength + 3) & ~3) - chunk.chunkLength; + if (padding > 0) { + stream.Seek(padding, aiOrigin_CUR); + } + + AI_SWAP4(header.length); + mBodyOffset = 12 + 8 + chunk.chunkLength + padding + 8; + if (header.length >= mBodyOffset) { + if (stream.Read(&chunk, sizeof(chunk), 1) != 1) { + throw DeadlyImportError("GLTF: Unable to read BIN chunk"); + } + + AI_SWAP4(chunk.chunkLength); + AI_SWAP4(chunk.chunkType); + + if (chunk.chunkType != ChunkType_BIN) { + throw DeadlyImportError("GLTF: BIN chunk missing"); + } + + mBodyLength = chunk.chunkLength; + } + else { + mBodyOffset = mBodyLength = 0; + } +} + +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 + std::vector<char> sceneData; + if (isBinary) { + SetAsBinary(); // also creates the body buffer + ReadBinaryHeader(*stream, sceneData); + } + else { + mSceneLength = stream->FileSize(); + mBodyLength = 0; + + + // read the scene data + + sceneData.resize(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 = FindUInt(doc, "scene")) { + unsigned int sceneIndex = scene->GetUint(); + + Ref<Scene> s = scenes.Retrieve(sceneIndex); + + this->scene = s; + } + + // Clean up + for (size_t i = 0; i < mDicts.size(); ++i) { + mDicts[i]->DetachFromDocument(); + } +} + +inline void Asset::SetAsBinary() +{ + if (!mBodyBuffer) { + 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_materials_pbrSpecularGlossiness); + + #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; + + std::vector<char> buffer; + buffer.resize(id.size() + 16); + int offset = ai_snprintf(buffer.data(), buffer.size(), "%s_", id.c_str()); + for (int i = 0; it != mUsedIds.end(); ++i) { + ai_snprintf(buffer.data() + offset, buffer.size() - offset, "%d", i); + id = buffer.data(); + 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 |