2 * Copyright (c) 2023 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali-scene3d/public-api/loader/mesh-definition.h>
22 #include <dali/devel-api/adaptor-framework/file-stream.h>
23 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
24 #include <dali/integration-api/debug.h>
25 #include <dali/public-api/math/compile-time-math.h>
28 #include <type_traits>
30 namespace Dali::Scene3D::Loader
34 template<bool use32BitIndices>
38 using IndexType = typename std::conditional_t<use32BitIndices, uint32_t, uint16_t>;
39 IndexProvider(const uint16_t* indices)
40 : mData(reinterpret_cast<uintptr_t>(indices)),
41 mFunc(indices ? IncrementPointer : Increment)
45 IndexType operator()()
51 static IndexType Increment(uintptr_t& data)
53 // mData was 'zero' at construct time. Just simply return counter start with 0.
54 return static_cast<IndexType>(data++);
57 static IndexType IncrementPointer(uintptr_t& data)
59 auto iPtr = reinterpret_cast<const IndexType*>(data);
61 data = reinterpret_cast<uintptr_t>(++iPtr);
66 IndexType (*mFunc)(uintptr_t&);
69 const char* QUAD("quad");
71 ///@brief Reads a blob from the given stream @a source into @a target, which must have
72 /// at least @a descriptor.length bytes.
73 bool ReadBlob(const MeshDefinition::Blob& descriptor, std::istream& source, uint8_t* target)
76 if(!source.seekg(descriptor.mOffset, std::istream::beg))
81 if(descriptor.IsConsecutive())
83 return !!source.read(reinterpret_cast<char*>(target), static_cast<std::streamsize>(static_cast<size_t>(descriptor.mLength)));
87 if(descriptor.mStride > descriptor.mElementSizeHint)
89 const uint32_t diff = descriptor.mStride - descriptor.mElementSizeHint;
90 uint32_t readSize = 0;
91 uint32_t totalSize = (descriptor.mLength / descriptor.mElementSizeHint) * descriptor.mStride;
92 while(readSize < totalSize &&
93 source.read(reinterpret_cast<char*>(target), descriptor.mElementSizeHint) &&
94 source.seekg(diff, std::istream::cur))
96 readSize += descriptor.mStride;
97 target += descriptor.mElementSizeHint;
99 return readSize == totalSize;
106 void ReadValues(const std::vector<uint8_t>& valuesBuffer, const std::vector<uint8_t>& indicesBuffer, uint8_t* target, uint32_t count, uint32_t elementSizeHint)
108 const T* const indicesPtr = reinterpret_cast<const T* const>(indicesBuffer.data());
109 for(uint32_t index = 0u; index < count; ++index)
111 uint32_t valuesIndex = indicesPtr[index] * elementSizeHint;
112 memcpy(target + valuesIndex, &valuesBuffer[index * elementSizeHint], elementSizeHint);
116 bool ReadAccessor(const MeshDefinition::Accessor& accessor, std::istream& source, uint8_t* target)
118 bool success = false;
120 if(accessor.mBlob.IsDefined())
122 success = ReadBlob(accessor.mBlob, source, target);
131 const MeshDefinition::Blob& indices = accessor.mSparse->mIndices;
132 const MeshDefinition::Blob& values = accessor.mSparse->mValues;
134 if(!indices.IsDefined() || !values.IsDefined())
139 const auto indicesBufferSize = indices.GetBufferSize();
140 std::vector<uint8_t> indicesBuffer(indicesBufferSize);
141 success = ReadBlob(indices, source, indicesBuffer.data());
147 const auto valuesBufferSize = values.GetBufferSize();
148 std::vector<uint8_t> valuesBuffer(valuesBufferSize);
149 success = ReadBlob(values, source, valuesBuffer.data());
155 switch(indices.mElementSizeHint)
159 ReadValues<uint8_t>(valuesBuffer, indicesBuffer, target, accessor.mSparse->mCount, values.mElementSizeHint);
164 ReadValues<uint16_t>(valuesBuffer, indicesBuffer, target, accessor.mSparse->mCount, values.mElementSizeHint);
169 ReadValues<uint32_t>(valuesBuffer, indicesBuffer, target, accessor.mSparse->mCount, values.mElementSizeHint);
173 DALI_ASSERT_DEBUG(!"Unsupported type for an index");
181 void ReadJointAccessor(MeshDefinition::RawData& raw, const MeshDefinition::Accessor& accessor, std::istream& source, const std::string& meshPath)
183 constexpr auto sizeofBlobUnit = sizeof(T) * 4;
185 DALI_ASSERT_ALWAYS(((accessor.mBlob.mLength % sizeofBlobUnit == 0) ||
186 accessor.mBlob.mStride >= sizeofBlobUnit) &&
187 "Joints buffer length not a multiple of element size");
188 const auto inBufferSize = accessor.mBlob.GetBufferSize();
189 const auto outBufferSize = (sizeof(Vector4) / sizeofBlobUnit) * inBufferSize;
191 std::vector<uint8_t> buffer(outBufferSize);
192 auto inBuffer = buffer.data() + outBufferSize - inBufferSize;
193 if(!ReadAccessor(accessor, source, inBuffer))
195 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read joints from '" << meshPath << "'.";
198 if constexpr(sizeofBlobUnit != sizeof(Vector4))
200 auto floats = reinterpret_cast<float*>(buffer.data());
201 const auto end = inBuffer + inBufferSize;
202 while(inBuffer != end)
204 const auto value = *reinterpret_cast<T*>(inBuffer);
205 *floats = static_cast<float>(value);
207 inBuffer += sizeof(T);
211 raw.mAttribs.push_back({"aJoints", Property::VECTOR4, static_cast<uint32_t>(outBufferSize / sizeof(Vector4)), std::move(buffer)});
214 template<bool use32BitsIndices, typename IndexProviderType = IndexProvider<use32BitsIndices>>
215 bool GenerateNormals(MeshDefinition::RawData& raw)
217 using IndexType = typename IndexProviderType::IndexType;
219 // mIndicies size must be even if we use 32bit indices.
220 if(DALI_UNLIKELY(use32BitsIndices && !raw.mIndices.empty() && !(raw.mIndices.size() % (sizeof(IndexType) / sizeof(uint16_t)) == 0)))
225 auto& attribs = raw.mAttribs;
226 DALI_ASSERT_DEBUG(attribs.size() > 0); // positions
228 IndexProviderType getIndex(raw.mIndices.data());
230 const uint32_t numIndices = raw.mIndices.empty() ? attribs[0].mNumElements : static_cast<uint32_t>(raw.mIndices.size() / (sizeof(IndexType) / sizeof(uint16_t)));
232 auto* positions = reinterpret_cast<const Vector3*>(attribs[0].mData.data());
234 std::vector<uint8_t> buffer(attribs[0].mNumElements * sizeof(Vector3));
235 auto normals = reinterpret_cast<Vector3*>(buffer.data());
237 for(uint32_t i = 0; i < numIndices; i += 3)
239 IndexType indices[]{getIndex(), getIndex(), getIndex()};
240 Vector3 pos[]{positions[indices[0]], positions[indices[1]], positions[indices[2]]};
242 Vector3 a = pos[1] - pos[0];
243 Vector3 b = pos[2] - pos[0];
245 Vector3 normal(a.Cross(b));
246 normals[indices[0]] += normal;
247 normals[indices[1]] += normal;
248 normals[indices[2]] += normal;
251 auto iEnd = normals + attribs[0].mNumElements;
252 while(normals != iEnd)
254 normals->Normalize();
258 attribs.push_back({"aNormal", Property::VECTOR3, attribs[0].mNumElements, std::move(buffer)});
263 template<bool use32BitsIndices, bool useVec3, bool hasUvs, typename T = std::conditional_t<useVec3, Vector3, Vector4>, typename = std::enable_if_t<(std::is_same<T, Vector3>::value || std::is_same<T, Vector4>::value)>, typename IndexProviderType = IndexProvider<use32BitsIndices>>
264 bool GenerateTangents(MeshDefinition::RawData& raw)
266 using IndexType = typename IndexProviderType::IndexType;
268 // mIndicies size must be even if we use 32bit indices.
269 if(DALI_UNLIKELY(use32BitsIndices && !raw.mIndices.empty() && !(raw.mIndices.size() % (sizeof(IndexType) / sizeof(uint16_t)) == 0)))
274 auto& attribs = raw.mAttribs;
275 // Required positions, normals, uvs (if we have). If not, skip generation
276 if(DALI_UNLIKELY(attribs.size() < (2 + static_cast<size_t>(hasUvs))))
281 std::vector<uint8_t> buffer(attribs[0].mNumElements * sizeof(T));
282 auto tangents = reinterpret_cast<T*>(buffer.data());
286 IndexProviderType getIndex(raw.mIndices.data());
288 const uint32_t numIndices = raw.mIndices.empty() ? attribs[0].mNumElements : static_cast<uint32_t>(raw.mIndices.size() / (sizeof(IndexType) / sizeof(uint16_t)));
290 auto* positions = reinterpret_cast<const Vector3*>(attribs[0].mData.data());
291 auto* uvs = reinterpret_cast<const Vector2*>(attribs[2].mData.data());
293 for(uint32_t i = 0; i < numIndices; i += 3)
295 IndexType indices[]{getIndex(), getIndex(), getIndex()};
296 Vector3 pos[]{positions[indices[0]], positions[indices[1]], positions[indices[2]]};
297 Vector2 uv[]{uvs[indices[0]], uvs[indices[1]], uvs[indices[2]]};
299 float x0 = pos[1].x - pos[0].x;
300 float y0 = pos[1].y - pos[0].y;
301 float z0 = pos[1].z - pos[0].z;
303 float x1 = pos[2].x - pos[0].x;
304 float y1 = pos[2].y - pos[0].y;
305 float z1 = pos[2].z - pos[0].z;
307 float s0 = uv[1].x - uv[0].x;
308 float t0 = uv[1].y - uv[0].y;
310 float s1 = uv[2].x - uv[0].x;
311 float t1 = uv[2].y - uv[0].y;
313 float det = (s0 * t1 - t0 * s1);
314 float r = 1.f / ((std::abs(det) < Dali::Epsilon<1000>::value) ? (Dali::Epsilon<1000>::value * (det > 0.0f ? 1.f : -1.f)) : det);
315 Vector3 tangent((x0 * t1 - t0 * x1) * r, (y0 * t1 - t0 * y1) * r, (z0 * t1 - t0 * z1) * r);
316 tangents[indices[0]] += T(tangent);
317 tangents[indices[1]] += T(tangent);
318 tangents[indices[2]] += T(tangent);
322 auto* normals = reinterpret_cast<const Vector3*>(attribs[1].mData.data());
323 auto iEnd = normals + attribs[1].mNumElements;
324 while(normals != iEnd)
329 // Calculated by indexs
330 tangentVec3 = Vector3((*tangents).x, (*tangents).y, (*tangents).z);
334 // Only choiced by normal vector. by indexs
335 Vector3 t[]{normals->Cross(Vector3::XAXIS), normals->Cross(Vector3::YAXIS)};
336 tangentVec3 = t[t[1].LengthSquared() > t[0].LengthSquared()];
339 tangentVec3 -= *normals * normals->Dot(tangentVec3);
340 tangentVec3.Normalize();
341 if constexpr(useVec3)
343 *tangents = tangentVec3;
347 *tangents = Vector4(tangentVec3.x, tangentVec3.y, tangentVec3.z, 1.0f);
353 attribs.push_back({"aTangent", useVec3 ? Property::VECTOR3 : Property::VECTOR4, attribs[0].mNumElements, std::move(buffer)});
358 void CalculateTextureSize(uint32_t totalTextureSize, uint32_t& textureWidth, uint32_t& textureHeight)
360 DALI_ASSERT_DEBUG(0u != totalTextureSize && "totalTextureSize is zero.")
362 // Calculate the dimensions of the texture.
363 // The total size of the texture is the length of the blend shapes blob.
368 if(0u == totalTextureSize)
374 const uint32_t pow2 = static_cast<uint32_t>(ceil(log2(totalTextureSize)));
375 const uint32_t powWidth = pow2 >> 1u;
376 const uint32_t powHeight = pow2 - powWidth;
378 textureWidth = 1u << powWidth;
379 textureHeight = 1u << powHeight;
382 void CalculateGltf2BlendShapes(uint8_t* geometryBuffer, const std::vector<MeshDefinition::BlendShape>& blendShapes, uint32_t numberOfVertices, float& blendShapeUnnormalizeFactor, BufferDefinition::Vector& buffers)
384 uint32_t geometryBufferIndex = 0u;
385 float maxDistance = 0.f;
386 Vector3* geometryBufferV3 = reinterpret_cast<Vector3*>(geometryBuffer);
387 for(const auto& blendShape : blendShapes)
389 if(blendShape.deltas.IsDefined())
391 DALI_ASSERT_ALWAYS(((blendShape.deltas.mBlob.mLength % sizeof(Vector3) == 0u) ||
392 blendShape.deltas.mBlob.mStride >= sizeof(Vector3)) &&
393 "Blend Shape position buffer length not a multiple of element size");
395 const auto bufferSize = blendShape.deltas.mBlob.GetBufferSize();
396 std::vector<uint8_t> buffer(bufferSize);
397 if(ReadAccessor(blendShape.deltas, buffers[blendShape.deltas.mBufferIdx].GetBufferStream(), buffer.data()))
399 blendShape.deltas.mBlob.ApplyMinMax(static_cast<uint32_t>(bufferSize / sizeof(Vector3)), reinterpret_cast<float*>(buffer.data()));
400 // Calculate the difference with the original mesh.
401 // Find the max distance to normalize the deltas.
402 const Vector3* const deltasBuffer = reinterpret_cast<const Vector3* const>(buffer.data());
404 for(uint32_t index = 0u; index < numberOfVertices; ++index)
406 Vector3& delta = geometryBufferV3[geometryBufferIndex++];
407 delta = deltasBuffer[index];
409 maxDistance = std::max(maxDistance, delta.LengthSquared());
414 if(blendShape.normals.IsDefined())
416 DALI_ASSERT_ALWAYS(((blendShape.normals.mBlob.mLength % sizeof(Vector3) == 0u) ||
417 blendShape.normals.mBlob.mStride >= sizeof(Vector3)) &&
418 "Blend Shape normals buffer length not a multiple of element size");
420 const auto bufferSize = blendShape.normals.mBlob.GetBufferSize();
421 std::vector<uint8_t> buffer(bufferSize);
422 if(ReadAccessor(blendShape.normals, buffers[blendShape.normals.mBufferIdx].GetBufferStream(), buffer.data()))
424 blendShape.normals.mBlob.ApplyMinMax(static_cast<uint32_t>(bufferSize / sizeof(Vector3)), reinterpret_cast<float*>(buffer.data()));
426 // Calculate the difference with the original mesh, and translate to make all values positive.
427 const Vector3* const deltasBuffer = reinterpret_cast<const Vector3* const>(buffer.data());
429 for(uint32_t index = 0u; index < numberOfVertices; ++index)
431 Vector3& delta = geometryBufferV3[geometryBufferIndex++];
432 delta = deltasBuffer[index];
445 if(blendShape.tangents.IsDefined())
447 DALI_ASSERT_ALWAYS(((blendShape.tangents.mBlob.mLength % sizeof(Vector3) == 0u) ||
448 blendShape.tangents.mBlob.mStride >= sizeof(Vector3)) &&
449 "Blend Shape tangents buffer length not a multiple of element size");
451 const auto bufferSize = blendShape.tangents.mBlob.GetBufferSize();
452 std::vector<uint8_t> buffer(bufferSize);
453 if(ReadAccessor(blendShape.tangents, buffers[blendShape.tangents.mBufferIdx].GetBufferStream(), buffer.data()))
455 blendShape.tangents.mBlob.ApplyMinMax(static_cast<uint32_t>(bufferSize / sizeof(Vector3)), reinterpret_cast<float*>(buffer.data()));
457 // Calculate the difference with the original mesh, and translate to make all values positive.
458 const Vector3* const deltasBuffer = reinterpret_cast<const Vector3* const>(buffer.data());
460 for(uint32_t index = 0u; index < numberOfVertices; ++index)
462 Vector3& delta = geometryBufferV3[geometryBufferIndex++];
463 delta = deltasBuffer[index];
477 geometryBufferIndex = 0u;
478 for(const auto& blendShape : blendShapes)
480 // Normalize all the deltas and translate to a possitive value.
481 // Deltas are going to be passed to the shader in a color texture
482 // whose values that are less than zero are clamped.
483 if(blendShape.deltas.IsDefined())
485 const float normalizeFactor = (fabsf(maxDistance) < Math::MACHINE_EPSILON_1000) ? 1.f : (0.5f / sqrtf(maxDistance));
487 for(uint32_t index = 0u; index < numberOfVertices; ++index)
489 Vector3& delta = geometryBufferV3[geometryBufferIndex++];
490 delta.x = Clamp(((delta.x * normalizeFactor) + 0.5f), 0.f, 1.f);
491 delta.y = Clamp(((delta.y * normalizeFactor) + 0.5f), 0.f, 1.f);
492 delta.z = Clamp(((delta.z * normalizeFactor) + 0.5f), 0.f, 1.f);
495 // Calculate and store the unnormalize factor.
496 blendShapeUnnormalizeFactor = 1.f / normalizeFactor;
499 if(blendShape.normals.IsDefined())
501 geometryBufferIndex += numberOfVertices;
504 if(blendShape.tangents.IsDefined())
506 geometryBufferIndex += numberOfVertices;
511 std::iostream& GetAvailableData(std::fstream& meshStream, const std::string& meshPath, BufferDefinition& buffer, std::string& availablePath)
513 auto& stream = (meshStream.is_open()) ? meshStream : buffer.GetBufferStream();
514 availablePath = (meshStream.is_open()) ? meshPath : buffer.GetUri();
520 MeshDefinition::SparseBlob::SparseBlob(const Blob& indices, const Blob& values, uint32_t count)
527 MeshDefinition::SparseBlob::SparseBlob(Blob&& indices, Blob&& values, uint32_t count)
528 : mIndices(std::move(indices)),
529 mValues(std::move(values)),
534 MeshDefinition::Accessor::Accessor(const MeshDefinition::Blob& blob,
535 const MeshDefinition::SparseBlob& sparse,
538 mSparse{(sparse.mIndices.IsDefined() && sparse.mValues.IsDefined()) ? new SparseBlob{sparse} : nullptr},
539 mBufferIdx(bufferIndex)
543 MeshDefinition::Accessor::Accessor(MeshDefinition::Blob&& blob,
544 MeshDefinition::SparseBlob&& sparse,
546 : mBlob{std::move(blob)},
547 mSparse{(sparse.mIndices.IsDefined() && sparse.mValues.IsDefined()) ? new SparseBlob{std::move(sparse)} : nullptr},
548 mBufferIdx(bufferIndex)
552 void MeshDefinition::Blob::ComputeMinMax(std::vector<float>& min, std::vector<float>& max, uint32_t numComponents, uint32_t count, const float* values)
554 min.assign(numComponents, MAXFLOAT);
555 max.assign(numComponents, -MAXFLOAT);
556 for(uint32_t i = 0; i < count; ++i)
558 for(uint32_t j = 0; j < numComponents; ++j)
560 min[j] = std::min(min[j], *values);
561 max[j] = std::max(max[j], *values);
567 void MeshDefinition::Blob::ApplyMinMax(const std::vector<float>& min, const std::vector<float>& max, uint32_t count, float* values)
569 DALI_ASSERT_DEBUG(max.size() == min.size() || max.size() * min.size() == 0);
570 const auto numComponents = std::max(min.size(), max.size());
572 using ClampFn = void (*)(const float*, const float*, uint32_t, float&);
573 ClampFn clampFn = min.empty() ? (max.empty() ? static_cast<ClampFn>(nullptr) : [](const float* min, const float* max, uint32_t i, float& value) { value = std::min(max[i], value); })
574 : (max.empty() ? [](const float* min, const float* max, uint32_t i, float& value) { value = std::max(min[i], value); }
575 : static_cast<ClampFn>([](const float* min, const float* max, uint32_t i, float& value) { value = std::min(std::max(min[i], value), max[i]); }));
582 auto end = values + count * numComponents;
585 auto nextElement = values + numComponents;
587 while(values != nextElement)
589 clampFn(min.data(), max.data(), i, *values);
596 MeshDefinition::Blob::Blob(uint32_t offset, uint32_t length, uint16_t stride, uint16_t elementSizeHint, const std::vector<float>& min, const std::vector<float>& max)
600 mElementSizeHint(elementSizeHint),
606 uint32_t MeshDefinition::Blob::GetBufferSize() const
611 void MeshDefinition::Blob::ComputeMinMax(uint32_t numComponents, uint32_t count, float* values)
613 ComputeMinMax(mMin, mMax, numComponents, count, values);
616 void MeshDefinition::Blob::ApplyMinMax(uint32_t count, float* values) const
618 ApplyMinMax(mMin, mMax, count, values);
621 void MeshDefinition::RawData::Attrib::AttachBuffer(Geometry& g) const
623 Property::Map attribMap;
624 attribMap[mName] = mType;
625 VertexBuffer attribBuffer = VertexBuffer::New(attribMap);
626 attribBuffer.SetData(mData.data(), mNumElements);
628 g.AddVertexBuffer(attribBuffer);
631 bool MeshDefinition::IsQuad() const
633 return CaseInsensitiveStringCompare(QUAD, mUri);
636 bool MeshDefinition::IsSkinned() const
638 return mJoints0.IsDefined() && mWeights0.IsDefined();
641 bool MeshDefinition::HasBlendShapes() const
643 return !mBlendShapes.empty();
646 void MeshDefinition::RequestNormals()
648 mNormals.mBlob.mLength = mPositions.mBlob.GetBufferSize();
651 void MeshDefinition::RequestTangents()
653 mTangents.mBlob.mLength = mNormals.mBlob.GetBufferSize();
656 MeshDefinition::RawData
657 MeshDefinition::LoadRaw(const std::string& modelsPath, BufferDefinition::Vector& buffers)
665 std::string meshPath;
666 meshPath = modelsPath + mUri;
667 std::fstream fileStream;
670 fileStream.open(meshPath, std::ios::in | std::ios::binary);
671 if(!fileStream.is_open())
673 DALI_LOG_ERROR("Fail to open buffer from %s.\n", meshPath.c_str());
677 if(mIndices.IsDefined())
679 if(MaskMatch(mFlags, U32_INDICES))
681 DALI_ASSERT_ALWAYS(((mIndices.mBlob.mLength % sizeof(uint32_t) == 0) ||
682 mIndices.mBlob.mStride >= sizeof(uint32_t)) &&
683 "Index buffer length not a multiple of element size");
684 const auto indexCount = mIndices.mBlob.GetBufferSize() / sizeof(uint32_t);
685 raw.mIndices.resize(indexCount * 2); // NOTE: we need space for uint32_ts initially.
688 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mIndices.mBufferIdx], path);
689 if(!ReadAccessor(mIndices, stream, reinterpret_cast<uint8_t*>(raw.mIndices.data())))
691 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read indices from '" << path << "'.";
694 else if(MaskMatch(mFlags, U8_INDICES))
696 DALI_ASSERT_ALWAYS(((mIndices.mBlob.mLength % sizeof(uint8_t) == 0) ||
697 mIndices.mBlob.mStride >= sizeof(uint8_t)) &&
698 "Index buffer length not a multiple of element size");
699 const auto indexCount = mIndices.mBlob.GetBufferSize() / sizeof(uint8_t);
700 raw.mIndices.resize(indexCount); // NOTE: we need space for uint16_ts initially.
703 auto u8s = reinterpret_cast<uint8_t*>(raw.mIndices.data()) + indexCount;
704 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mIndices.mBufferIdx], path);
705 if(!ReadAccessor(mIndices, stream, u8s))
707 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read indices from '" << path << "'.";
710 auto u16s = raw.mIndices.data();
711 auto end = u8s + indexCount;
714 *u16s = static_cast<uint16_t>(*u8s);
721 DALI_ASSERT_ALWAYS(((mIndices.mBlob.mLength % sizeof(unsigned short) == 0) ||
722 mIndices.mBlob.mStride >= sizeof(unsigned short)) &&
723 "Index buffer length not a multiple of element size");
724 raw.mIndices.resize(mIndices.mBlob.mLength / sizeof(unsigned short));
727 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mIndices.mBufferIdx], path);
728 if(!ReadAccessor(mIndices, stream, reinterpret_cast<uint8_t*>(raw.mIndices.data())))
730 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read indices from '" << path << "'.";
735 std::vector<Vector3> positions;
736 if(mPositions.IsDefined())
738 DALI_ASSERT_ALWAYS(((mPositions.mBlob.mLength % sizeof(Vector3) == 0) ||
739 mPositions.mBlob.mStride >= sizeof(Vector3)) &&
740 "Position buffer length not a multiple of element size");
741 const auto bufferSize = mPositions.mBlob.GetBufferSize();
742 std::vector<uint8_t> buffer(bufferSize);
745 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mPositions.mBufferIdx], path);
746 if(!ReadAccessor(mPositions, stream, buffer.data()))
748 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read positions from '" << path << "'.";
751 uint32_t numVector3 = static_cast<uint32_t>(bufferSize / sizeof(Vector3));
752 if(mPositions.mBlob.mMin.size() != 3u || mPositions.mBlob.mMax.size() != 3u)
754 mPositions.mBlob.ComputeMinMax(3u, numVector3, reinterpret_cast<float*>(buffer.data()));
758 mPositions.mBlob.ApplyMinMax(numVector3, reinterpret_cast<float*>(buffer.data()));
763 positions.resize(numVector3);
764 std::copy(buffer.data(), buffer.data() + buffer.size(), reinterpret_cast<uint8_t*>(positions.data()));
767 raw.mAttribs.push_back({"aPosition", Property::VECTOR3, numVector3, std::move(buffer)});
770 const auto isTriangles = mPrimitiveType == Geometry::TRIANGLES;
771 auto hasNormals = mNormals.IsDefined();
774 DALI_ASSERT_ALWAYS(((mNormals.mBlob.mLength % sizeof(Vector3) == 0) ||
775 mNormals.mBlob.mStride >= sizeof(Vector3)) &&
776 "Normal buffer length not a multiple of element size");
777 const auto bufferSize = mNormals.mBlob.GetBufferSize();
778 std::vector<uint8_t> buffer(bufferSize);
781 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mNormals.mBufferIdx], path);
782 if(!ReadAccessor(mNormals, stream, buffer.data()))
784 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read normals from '" << path << "'.";
787 mNormals.mBlob.ApplyMinMax(static_cast<uint32_t>(bufferSize / sizeof(Vector3)), reinterpret_cast<float*>(buffer.data()));
789 raw.mAttribs.push_back({"aNormal", Property::VECTOR3, static_cast<uint32_t>(bufferSize / sizeof(Vector3)), std::move(buffer)});
791 else if(mNormals.mBlob.mLength != 0 && isTriangles)
793 DALI_ASSERT_DEBUG(mNormals.mBlob.mLength == mPositions.mBlob.GetBufferSize());
794 static const std::function<bool(RawData&)> GenerateNormalsFunction[2] =
796 GenerateNormals<false>,
797 GenerateNormals<true>,
799 const bool generateSuccessed = GenerateNormalsFunction[MaskMatch(mFlags, U32_INDICES)](raw);
800 if(!generateSuccessed)
802 DALI_LOG_ERROR("Failed to generate normal\n");
810 const auto hasUvs = mTexCoords.IsDefined();
813 DALI_ASSERT_ALWAYS(((mTexCoords.mBlob.mLength % sizeof(Vector2) == 0) ||
814 mTexCoords.mBlob.mStride >= sizeof(Vector2)) &&
815 "Normal buffer length not a multiple of element size");
816 const auto bufferSize = mTexCoords.mBlob.GetBufferSize();
817 std::vector<uint8_t> buffer(bufferSize);
820 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mTexCoords.mBufferIdx], path);
821 if(!ReadAccessor(mTexCoords, stream, buffer.data()))
823 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read uv-s from '" << path << "'.";
826 const auto uvCount = bufferSize / sizeof(Vector2);
827 if(MaskMatch(mFlags, FLIP_UVS_VERTICAL))
829 auto uv = reinterpret_cast<Vector2*>(buffer.data());
830 auto uvEnd = uv + uvCount;
833 uv->y = 1.0f - uv->y;
838 mTexCoords.mBlob.ApplyMinMax(static_cast<uint32_t>(uvCount), reinterpret_cast<float*>(buffer.data()));
840 raw.mAttribs.push_back({"aTexCoord", Property::VECTOR2, static_cast<uint32_t>(uvCount), std::move(buffer)});
843 if(mTangents.IsDefined())
845 uint32_t propertySize = static_cast<uint32_t>((mTangentType == Property::VECTOR4) ? sizeof(Vector4) : sizeof(Vector3));
846 DALI_ASSERT_ALWAYS(((mTangents.mBlob.mLength % propertySize == 0) ||
847 mTangents.mBlob.mStride >= propertySize) &&
848 "Tangents buffer length not a multiple of element size");
849 const auto bufferSize = mTangents.mBlob.GetBufferSize();
850 std::vector<uint8_t> buffer(bufferSize);
853 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mTangents.mBufferIdx], path);
854 if(!ReadAccessor(mTangents, stream, buffer.data()))
856 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read tangents from '" << path << "'.";
858 mTangents.mBlob.ApplyMinMax(bufferSize / propertySize, reinterpret_cast<float*>(buffer.data()));
860 raw.mAttribs.push_back({"aTangent", mTangentType, static_cast<uint32_t>(bufferSize / propertySize), std::move(buffer)});
862 else if(mTangents.mBlob.mLength != 0 && hasNormals && isTriangles)
864 DALI_ASSERT_DEBUG(mTangents.mBlob.mLength == mNormals.mBlob.GetBufferSize());
865 static const std::function<bool(RawData&)> GenerateTangentsFunction[2][2][2] =
869 GenerateTangents<false, false, false>,
870 GenerateTangents<false, false, true>,
873 GenerateTangents<false, true, false>,
874 GenerateTangents<false, true, true>,
879 GenerateTangents<true, false, false>,
880 GenerateTangents<true, false, true>,
883 GenerateTangents<true, true, false>,
884 GenerateTangents<true, true, true>,
887 const bool generateSuccessed = GenerateTangentsFunction[MaskMatch(mFlags, U32_INDICES)][mTangentType == Property::VECTOR3][hasUvs](raw);
888 if(!generateSuccessed)
890 DALI_LOG_ERROR("Failed to generate tangents\n");
894 if(mColors.IsDefined())
896 uint32_t propertySize = mColors.mBlob.mElementSizeHint;
897 Property::Type propertyType = (propertySize == sizeof(Vector4)) ? Property::VECTOR4 : ((propertySize == sizeof(Vector3)) ? Property::VECTOR3 : Property::NONE);
898 if(propertyType != Property::NONE)
900 DALI_ASSERT_ALWAYS(((mColors.mBlob.mLength % propertySize == 0) ||
901 mColors.mBlob.mStride >= propertySize) &&
902 "Colors buffer length not a multiple of element size");
903 const auto bufferSize = mColors.mBlob.GetBufferSize();
904 std::vector<uint8_t> buffer(bufferSize);
907 auto& stream = GetAvailableData(fileStream, meshPath, buffers[mColors.mBufferIdx], path);
908 if(!ReadAccessor(mColors, stream, buffer.data()))
910 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read colors from '" << path << "'.";
912 mColors.mBlob.ApplyMinMax(bufferSize / propertySize, reinterpret_cast<float*>(buffer.data()));
914 raw.mAttribs.push_back({"aVertexColor", propertyType, static_cast<uint32_t>(bufferSize / propertySize), std::move(buffer)});
919 std::vector<uint8_t> buffer(raw.mAttribs[0].mNumElements * sizeof(Vector4));
920 auto colors = reinterpret_cast<Vector4*>(buffer.data());
922 for(uint32_t i = 0; i < raw.mAttribs[0].mNumElements; i++)
924 colors[i] = Vector4::ONE;
927 raw.mAttribs.push_back({"aVertexColor", Property::VECTOR4, raw.mAttribs[0].mNumElements, std::move(buffer)});
932 std::string pathJoint;
933 auto& streamJoint = GetAvailableData(fileStream, meshPath, buffers[mJoints0.mBufferIdx], pathJoint);
934 if(MaskMatch(mFlags, U16_JOINT_IDS))
936 ReadJointAccessor<uint16_t>(raw, mJoints0, streamJoint, pathJoint);
938 else if(MaskMatch(mFlags, U8_JOINT_IDS))
940 ReadJointAccessor<uint8_t>(raw, mJoints0, streamJoint, pathJoint);
944 ReadJointAccessor<float>(raw, mJoints0, streamJoint, pathJoint);
947 DALI_ASSERT_ALWAYS(((mWeights0.mBlob.mLength % sizeof(Vector4) == 0) ||
948 mWeights0.mBlob.mStride >= sizeof(Vector4)) &&
949 "Weights buffer length not a multiple of element size");
950 const auto bufferSize = mWeights0.mBlob.GetBufferSize();
951 std::vector<uint8_t> buffer(bufferSize);
953 std::string pathWeight;
954 auto& streamWeight = GetAvailableData(fileStream, meshPath, buffers[mWeights0.mBufferIdx], pathWeight);
955 if(!ReadAccessor(mWeights0, streamWeight, buffer.data()))
957 ExceptionFlinger(ASSERT_LOCATION) << "Failed to read weights from '" << pathWeight << "'.";
960 raw.mAttribs.push_back({"aWeights", Property::VECTOR4, static_cast<uint32_t>(bufferSize / sizeof(Vector4)), std::move(buffer)});
963 // Calculate the Blob for the blend shapes.
964 Blob blendShapesBlob;
965 blendShapesBlob.mOffset = std::numeric_limits<unsigned int>::max();
966 blendShapesBlob.mLength = 0u;
968 for(const auto& blendShape : mBlendShapes)
970 for(auto i : {&blendShape.deltas, &blendShape.normals, &blendShape.tangents})
974 blendShapesBlob.mOffset = std::min(blendShapesBlob.mOffset, i->mBlob.mOffset);
975 blendShapesBlob.mLength += i->mBlob.mLength;
982 const uint32_t numberOfVertices = static_cast<uint32_t>(mPositions.mBlob.mLength / sizeof(Vector3));
984 // Calculate the size of one buffer inside the texture.
985 raw.mBlendShapeBufferOffset = numberOfVertices;
987 bool calculateGltf2BlendShapes = false;
988 uint32_t textureWidth = 0u;
989 uint32_t textureHeight = 0u;
991 if(!mBlendShapeHeader.IsDefined())
993 CalculateTextureSize(static_cast<uint32_t>(blendShapesBlob.mLength / sizeof(Vector3)), textureWidth, textureHeight);
994 calculateGltf2BlendShapes = true;
999 ReadBlob(mBlendShapeHeader, fileStream, reinterpret_cast<uint8_t*>(header));
1000 textureWidth = header[0u];
1001 textureHeight = header[1u];
1004 const uint32_t numberOfBlendShapes = mBlendShapes.size();
1005 raw.mBlendShapeUnnormalizeFactor.Resize(numberOfBlendShapes);
1007 Devel::PixelBuffer geometryPixelBuffer = Devel::PixelBuffer::New(textureWidth, textureHeight, Pixel::RGB32F);
1008 uint8_t* geometryBuffer = geometryPixelBuffer.GetBuffer();
1010 if(calculateGltf2BlendShapes)
1012 CalculateGltf2BlendShapes(geometryBuffer, mBlendShapes, numberOfVertices, raw.mBlendShapeUnnormalizeFactor[0u], buffers);
1016 Blob unnormalizeFactorBlob;
1017 unnormalizeFactorBlob.mLength = static_cast<uint32_t>(sizeof(float) * ((BlendShapes::Version::VERSION_2_0 == mBlendShapeVersion) ? 1u : numberOfBlendShapes));
1019 if(blendShapesBlob.IsDefined())
1021 if(ReadBlob(blendShapesBlob, fileStream, geometryBuffer))
1023 unnormalizeFactorBlob.mOffset = blendShapesBlob.mOffset + blendShapesBlob.mLength;
1027 // Read the unnormalize factors.
1028 if(unnormalizeFactorBlob.IsDefined())
1030 ReadBlob(unnormalizeFactorBlob, fileStream, reinterpret_cast<uint8_t*>(&raw.mBlendShapeUnnormalizeFactor[0u]));
1033 raw.mBlendShapeData = Devel::PixelBuffer::Convert(geometryPixelBuffer);
1039 MeshGeometry MeshDefinition::Load(RawData&& raw) const
1041 MeshGeometry meshGeometry;
1042 meshGeometry.geometry = Geometry::New();
1043 meshGeometry.geometry.SetType(mPrimitiveType);
1045 if(IsQuad()) // TODO: do this in raw data; provide MakeTexturedQuadGeometry() that only creates buffers.
1047 auto options = MaskMatch(mFlags, FLIP_UVS_VERTICAL) ? TexturedQuadOptions::FLIP_VERTICAL : 0;
1048 meshGeometry.geometry = MakeTexturedQuadGeometry(options);
1052 if(!raw.mIndices.empty())
1054 if(MaskMatch(mFlags, U32_INDICES))
1056 // TODO : We can only store indeces as uint16_type. Send Dali::Geometry that we use it as uint32_t actual.
1057 meshGeometry.geometry.SetIndexBuffer(reinterpret_cast<const uint32_t*>(raw.mIndices.data()), raw.mIndices.size() / 2);
1061 meshGeometry.geometry.SetIndexBuffer(raw.mIndices.data(), raw.mIndices.size());
1065 for(auto& a : raw.mAttribs)
1067 a.AttachBuffer(meshGeometry.geometry);
1070 if(HasBlendShapes())
1072 meshGeometry.blendShapeBufferOffset = raw.mBlendShapeBufferOffset;
1073 meshGeometry.blendShapeUnnormalizeFactor = std::move(raw.mBlendShapeUnnormalizeFactor);
1075 meshGeometry.blendShapeGeometry = Texture::New(TextureType::TEXTURE_2D,
1076 raw.mBlendShapeData.GetPixelFormat(),
1077 raw.mBlendShapeData.GetWidth(),
1078 raw.mBlendShapeData.GetHeight());
1079 meshGeometry.blendShapeGeometry.Upload(raw.mBlendShapeData);
1083 return meshGeometry;
1086 void MeshDefinition::RetrieveBlendShapeComponents(bool& hasPositions, bool& hasNormals, bool& hasTangents) const
1088 for(const auto& blendShape : mBlendShapes)
1090 hasPositions = hasPositions || blendShape.deltas.IsDefined();
1091 hasNormals = hasNormals || blendShape.normals.IsDefined();
1092 hasTangents = hasTangents || blendShape.tangents.IsDefined();
1096 } // namespace Dali::Scene3D::Loader