| // |
| // Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // IndexDataManager.cpp: Defines the IndexDataManager, a class that |
| // runs the Buffer translation process for index buffers. |
| |
| #include "libANGLE/renderer/d3d/IndexDataManager.h" |
| |
| #include "common/utilities.h" |
| #include "libANGLE/Buffer.h" |
| #include "libANGLE/Context.h" |
| #include "libANGLE/VertexArray.h" |
| #include "libANGLE/formatutils.h" |
| #include "libANGLE/renderer/d3d/BufferD3D.h" |
| #include "libANGLE/renderer/d3d/ContextD3D.h" |
| #include "libANGLE/renderer/d3d/IndexBuffer.h" |
| |
| namespace rx |
| { |
| |
| namespace |
| { |
| |
| template <typename InputT, typename DestT> |
| void ConvertIndexArray(const void *input, |
| GLenum sourceType, |
| void *output, |
| GLenum destinationType, |
| GLsizei count, |
| bool usePrimitiveRestartFixedIndex) |
| { |
| const InputT *in = static_cast<const InputT *>(input); |
| DestT *out = static_cast<DestT *>(output); |
| |
| if (usePrimitiveRestartFixedIndex) |
| { |
| InputT srcRestartIndex = static_cast<InputT>(gl::GetPrimitiveRestartIndex(sourceType)); |
| DestT destRestartIndex = static_cast<DestT>(gl::GetPrimitiveRestartIndex(destinationType)); |
| for (GLsizei i = 0; i < count; i++) |
| { |
| out[i] = (in[i] == srcRestartIndex ? destRestartIndex : static_cast<DestT>(in[i])); |
| } |
| } |
| else |
| { |
| for (GLsizei i = 0; i < count; i++) |
| { |
| out[i] = static_cast<DestT>(in[i]); |
| } |
| } |
| } |
| |
| void ConvertIndices(GLenum sourceType, |
| GLenum destinationType, |
| const void *input, |
| GLsizei count, |
| void *output, |
| bool usePrimitiveRestartFixedIndex) |
| { |
| if (sourceType == destinationType) |
| { |
| const gl::Type &typeInfo = gl::GetTypeInfo(destinationType); |
| memcpy(output, input, count * typeInfo.bytes); |
| return; |
| } |
| |
| if (sourceType == GL_UNSIGNED_BYTE) |
| { |
| ASSERT(destinationType == GL_UNSIGNED_SHORT); |
| ConvertIndexArray<GLubyte, GLushort>(input, sourceType, output, destinationType, count, |
| usePrimitiveRestartFixedIndex); |
| } |
| else if (sourceType == GL_UNSIGNED_SHORT) |
| { |
| ASSERT(destinationType == GL_UNSIGNED_INT); |
| ConvertIndexArray<GLushort, GLuint>(input, sourceType, output, destinationType, count, |
| usePrimitiveRestartFixedIndex); |
| } |
| else |
| UNREACHABLE(); |
| } |
| |
| angle::Result StreamInIndexBuffer(const gl::Context *context, |
| IndexBufferInterface *buffer, |
| const void *data, |
| unsigned int count, |
| GLenum srcType, |
| GLenum dstType, |
| bool usePrimitiveRestartFixedIndex, |
| unsigned int *offset) |
| { |
| const gl::Type &dstTypeInfo = gl::GetTypeInfo(dstType); |
| |
| bool check = (count > (std::numeric_limits<unsigned int>::max() >> dstTypeInfo.bytesShift)); |
| ANGLE_CHECK(GetImplAs<ContextD3D>(context), !check, |
| "Reserving indices exceeds the maximum buffer size.", GL_OUT_OF_MEMORY); |
| |
| unsigned int bufferSizeRequired = count << dstTypeInfo.bytesShift; |
| ANGLE_TRY(buffer->reserveBufferSpace(context, bufferSizeRequired, dstType)); |
| |
| void *output = nullptr; |
| ANGLE_TRY(buffer->mapBuffer(context, bufferSizeRequired, &output, offset)); |
| |
| ConvertIndices(srcType, dstType, data, count, output, usePrimitiveRestartFixedIndex); |
| |
| ANGLE_TRY(buffer->unmapBuffer(context)); |
| return angle::Result::Continue(); |
| } |
| |
| unsigned int ElementTypeSize(GLenum elementType) |
| { |
| switch (elementType) |
| { |
| case GL_UNSIGNED_BYTE: |
| return sizeof(GLubyte); |
| case GL_UNSIGNED_SHORT: |
| return sizeof(GLushort); |
| case GL_UNSIGNED_INT: |
| return sizeof(GLuint); |
| default: |
| UNREACHABLE(); |
| return 0; |
| } |
| } |
| |
| } // anonymous namespace |
| |
| bool IsOffsetAligned(GLenum elementType, unsigned int offset) |
| { |
| return (offset % ElementTypeSize(elementType) == 0); |
| } |
| |
| // IndexDataManager implementation. |
| IndexDataManager::IndexDataManager(BufferFactoryD3D *factory) |
| : mFactory(factory), mStreamingBufferShort(), mStreamingBufferInt() |
| { |
| } |
| |
| IndexDataManager::~IndexDataManager() |
| { |
| } |
| |
| void IndexDataManager::deinitialize() |
| { |
| mStreamingBufferShort.reset(); |
| mStreamingBufferInt.reset(); |
| } |
| |
| // This function translates a GL-style indices into DX-style indices, with their description |
| // returned in translated. |
| // GL can specify vertex data in immediate mode (pointer to CPU array of indices), which is not |
| // possible in DX and requires streaming (Case 1). If the GL indices are specified with a buffer |
| // (Case 2), in a format supported by DX (subcase a) then all is good. |
| // When we have a buffer with an unsupported format (subcase b) then we need to do some translation: |
| // we will start by falling back to streaming, and after a while will start using a static |
| // translated copy of the index buffer. |
| angle::Result IndexDataManager::prepareIndexData(const gl::Context *context, |
| GLenum srcType, |
| GLenum dstType, |
| GLsizei count, |
| gl::Buffer *glBuffer, |
| const void *indices, |
| TranslatedIndexData *translated) |
| { |
| const gl::Type &srcTypeInfo = gl::GetTypeInfo(srcType); |
| const gl::Type &dstTypeInfo = gl::GetTypeInfo(dstType); |
| |
| BufferD3D *buffer = glBuffer ? GetImplAs<BufferD3D>(glBuffer) : nullptr; |
| |
| translated->indexType = dstType; |
| translated->srcIndexData.srcBuffer = buffer; |
| translated->srcIndexData.srcIndices = indices; |
| translated->srcIndexData.srcIndexType = srcType; |
| translated->srcIndexData.srcCount = count; |
| |
| // Context can be nullptr in perf tests. |
| bool primitiveRestartFixedIndexEnabled = |
| context ? context->getGLState().isPrimitiveRestartEnabled() : false; |
| |
| // Case 1: the indices are passed by pointer, which forces the streaming of index data |
| if (glBuffer == nullptr) |
| { |
| translated->storage = nullptr; |
| return streamIndexData(context, indices, count, srcType, dstType, |
| primitiveRestartFixedIndexEnabled, translated); |
| } |
| |
| // Case 2: the indices are already in a buffer |
| unsigned int offset = static_cast<unsigned int>(reinterpret_cast<uintptr_t>(indices)); |
| ASSERT(srcTypeInfo.bytes * static_cast<unsigned int>(count) + offset <= buffer->getSize()); |
| |
| bool offsetAligned = IsOffsetAligned(srcType, offset); |
| |
| // Case 2a: the buffer can be used directly |
| if (offsetAligned && buffer->supportsDirectBinding() && dstType == srcType) |
| { |
| translated->storage = buffer; |
| translated->indexBuffer = nullptr; |
| translated->serial = buffer->getSerial(); |
| translated->startIndex = (offset >> srcTypeInfo.bytesShift); |
| translated->startOffset = offset; |
| return angle::Result::Continue(); |
| } |
| |
| translated->storage = nullptr; |
| |
| // Case 2b: use a static translated copy or fall back to streaming |
| StaticIndexBufferInterface *staticBuffer = buffer->getStaticIndexBuffer(); |
| |
| bool staticBufferInitialized = staticBuffer && staticBuffer->getBufferSize() != 0; |
| bool staticBufferUsable = |
| staticBuffer && offsetAligned && staticBuffer->getIndexType() == dstType; |
| |
| if (staticBufferInitialized && !staticBufferUsable) |
| { |
| buffer->invalidateStaticData(context); |
| staticBuffer = nullptr; |
| } |
| |
| if (staticBuffer == nullptr || !offsetAligned) |
| { |
| const uint8_t *bufferData = nullptr; |
| ANGLE_TRY(buffer->getData(context, &bufferData)); |
| ASSERT(bufferData != nullptr); |
| |
| ANGLE_TRY(streamIndexData(context, bufferData + offset, count, srcType, dstType, |
| primitiveRestartFixedIndexEnabled, translated)); |
| buffer->promoteStaticUsage(context, count << srcTypeInfo.bytesShift); |
| } |
| else |
| { |
| if (!staticBufferInitialized) |
| { |
| const uint8_t *bufferData = nullptr; |
| ANGLE_TRY(buffer->getData(context, &bufferData)); |
| ASSERT(bufferData != nullptr); |
| |
| unsigned int convertCount = |
| static_cast<unsigned int>(buffer->getSize()) >> srcTypeInfo.bytesShift; |
| ANGLE_TRY(StreamInIndexBuffer(context, staticBuffer, bufferData, convertCount, srcType, |
| dstType, primitiveRestartFixedIndexEnabled, nullptr)); |
| } |
| ASSERT(offsetAligned && staticBuffer->getIndexType() == dstType); |
| |
| translated->indexBuffer = staticBuffer->getIndexBuffer(); |
| translated->serial = staticBuffer->getSerial(); |
| translated->startIndex = (offset >> srcTypeInfo.bytesShift); |
| translated->startOffset = (offset >> srcTypeInfo.bytesShift) << dstTypeInfo.bytesShift; |
| } |
| |
| return angle::Result::Continue(); |
| } |
| |
| angle::Result IndexDataManager::streamIndexData(const gl::Context *context, |
| const void *data, |
| unsigned int count, |
| GLenum srcType, |
| GLenum dstType, |
| bool usePrimitiveRestartFixedIndex, |
| TranslatedIndexData *translated) |
| { |
| const gl::Type &dstTypeInfo = gl::GetTypeInfo(dstType); |
| |
| IndexBufferInterface *indexBuffer = nullptr; |
| ANGLE_TRY(getStreamingIndexBuffer(context, dstType, &indexBuffer)); |
| ASSERT(indexBuffer != nullptr); |
| |
| unsigned int offset; |
| ANGLE_TRY(StreamInIndexBuffer(context, indexBuffer, data, count, srcType, dstType, |
| usePrimitiveRestartFixedIndex, &offset)); |
| |
| translated->indexBuffer = indexBuffer->getIndexBuffer(); |
| translated->serial = indexBuffer->getSerial(); |
| translated->startIndex = (offset >> dstTypeInfo.bytesShift); |
| translated->startOffset = offset; |
| |
| return angle::Result::Continue(); |
| } |
| |
| angle::Result IndexDataManager::getStreamingIndexBuffer(const gl::Context *context, |
| GLenum destinationIndexType, |
| IndexBufferInterface **outBuffer) |
| { |
| ASSERT(outBuffer); |
| ASSERT(destinationIndexType == GL_UNSIGNED_SHORT || destinationIndexType == GL_UNSIGNED_INT); |
| |
| auto &streamingBuffer = |
| (destinationIndexType == GL_UNSIGNED_INT) ? mStreamingBufferInt : mStreamingBufferShort; |
| |
| if (!streamingBuffer) |
| { |
| StreamingBuffer newBuffer(new StreamingIndexBufferInterface(mFactory)); |
| ANGLE_TRY(newBuffer->reserveBufferSpace(context, INITIAL_INDEX_BUFFER_SIZE, |
| destinationIndexType)); |
| streamingBuffer = std::move(newBuffer); |
| } |
| |
| *outBuffer = streamingBuffer.get(); |
| return angle::Result::Continue(); |
| } |
| |
| angle::Result GetIndexTranslationDestType(const gl::Context *context, |
| const gl::DrawCallParams &drawCallParams, |
| bool usePrimitiveRestartWorkaround, |
| GLenum *destTypeOut) |
| { |
| // Avoid D3D11's primitive restart index value |
| // see http://msdn.microsoft.com/en-us/library/windows/desktop/bb205124(v=vs.85).aspx |
| if (usePrimitiveRestartWorkaround) |
| { |
| // Conservatively assume we need to translate the indices for draw indirect. |
| if (drawCallParams.isDrawIndirect()) |
| { |
| *destTypeOut = GL_UNSIGNED_INT; |
| return angle::Result::Continue(); |
| } |
| |
| gl::IndexRange indexRange; |
| ANGLE_TRY_HANDLE(context, context->getGLState().getVertexArray()->getIndexRange( |
| context, drawCallParams.type(), drawCallParams.indexCount(), |
| drawCallParams.indices(), &indexRange)); |
| if (indexRange.end == gl::GetPrimitiveRestartIndex(drawCallParams.type())) |
| { |
| *destTypeOut = GL_UNSIGNED_INT; |
| return angle::Result::Continue(); |
| } |
| } |
| |
| *destTypeOut = (drawCallParams.type() == GL_UNSIGNED_INT) ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT; |
| return angle::Result::Continue(); |
| } |
| |
| } // namespace rx |