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Diffstat (limited to 'gfx/angle/src/libANGLE/renderer/d3d/IndexDataManager.cpp')
| -rwxr-xr-x | gfx/angle/src/libANGLE/renderer/d3d/IndexDataManager.cpp | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/renderer/d3d/IndexDataManager.cpp b/gfx/angle/src/libANGLE/renderer/d3d/IndexDataManager.cpp new file mode 100755 index 000000000..474c77fce --- /dev/null +++ b/gfx/angle/src/libANGLE/renderer/d3d/IndexDataManager.cpp @@ -0,0 +1,354 @@ +// +// 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/renderer/d3d/BufferD3D.h" +#include "libANGLE/renderer/d3d/IndexBuffer.h" +#include "libANGLE/Buffer.h" +#include "libANGLE/formatutils.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(); +} + +gl::Error StreamInIndexBuffer(IndexBufferInterface *buffer, + const GLvoid *data, + unsigned int count, + GLenum srcType, + GLenum dstType, + bool usePrimitiveRestartFixedIndex, + unsigned int *offset) +{ + const gl::Type &dstTypeInfo = gl::GetTypeInfo(dstType); + + if (count > (std::numeric_limits<unsigned int>::max() >> dstTypeInfo.bytesShift)) + { + return gl::Error(GL_OUT_OF_MEMORY, + "Reserving %u indices of %u bytes each exceeds the maximum buffer size.", + count, dstTypeInfo.bytes); + } + + unsigned int bufferSizeRequired = count << dstTypeInfo.bytesShift; + gl::Error error = buffer->reserveBufferSpace(bufferSizeRequired, dstType); + if (error.isError()) + { + return error; + } + + void *output = nullptr; + error = buffer->mapBuffer(bufferSizeRequired, &output, offset); + if (error.isError()) + { + return error; + } + + ConvertIndices(srcType, dstType, data, count, output, usePrimitiveRestartFixedIndex); + + error = buffer->unmapBuffer(); + if (error.isError()) + { + return error; + } + + return gl::Error(GL_NO_ERROR); +} + +} // anonymous namespace + +IndexDataManager::IndexDataManager(BufferFactoryD3D *factory, RendererClass rendererClass) + : mFactory(factory), + mRendererClass(rendererClass), + mStreamingBufferShort(nullptr), + mStreamingBufferInt(nullptr) +{ +} + +IndexDataManager::~IndexDataManager() +{ + SafeDelete(mStreamingBufferShort); + SafeDelete(mStreamingBufferInt); +} + +// 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. +gl::Error IndexDataManager::prepareIndexData(GLenum srcType, + GLsizei count, + gl::Buffer *glBuffer, + const GLvoid *indices, + TranslatedIndexData *translated, + bool primitiveRestartFixedIndexEnabled) +{ + // Avoid D3D11's primitive restart index value + // see http://msdn.microsoft.com/en-us/library/windows/desktop/bb205124(v=vs.85).aspx + bool hasPrimitiveRestartIndex = + translated->indexRange.vertexIndexCount < static_cast<size_t>(count) || + translated->indexRange.end == gl::GetPrimitiveRestartIndex(srcType); + bool primitiveRestartWorkaround = mRendererClass == RENDERER_D3D11 && + !primitiveRestartFixedIndexEnabled && + hasPrimitiveRestartIndex && srcType == GL_UNSIGNED_SHORT; + + // We should never have to deal with MAX_UINT indices, since we restrict it via + // MAX_ELEMENT_INDEX. + ASSERT(!(mRendererClass == RENDERER_D3D11 && !primitiveRestartFixedIndexEnabled && + hasPrimitiveRestartIndex && srcType == GL_UNSIGNED_INT)); + + const GLenum dstType = (srcType == GL_UNSIGNED_INT || primitiveRestartWorkaround) ? + GL_UNSIGNED_INT : GL_UNSIGNED_SHORT; + + 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; + + // Case 1: the indices are passed by pointer, which forces the streaming of index data + if (glBuffer == nullptr) + { + translated->storage = nullptr; + return streamIndexData(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; + switch (srcType) + { + case GL_UNSIGNED_BYTE: offsetAligned = (offset % sizeof(GLubyte) == 0); break; + case GL_UNSIGNED_SHORT: offsetAligned = (offset % sizeof(GLushort) == 0); break; + case GL_UNSIGNED_INT: offsetAligned = (offset % sizeof(GLuint) == 0); break; + default: UNREACHABLE(); offsetAligned = false; + } + + // Case 2a: the buffer can be used directly + if (offsetAligned && buffer->supportsDirectBinding() && + dstType == srcType && !primitiveRestartWorkaround) + { + translated->storage = buffer; + translated->indexBuffer = nullptr; + translated->serial = buffer->getSerial(); + translated->startIndex = (offset >> srcTypeInfo.bytesShift); + translated->startOffset = offset; + return gl::Error(GL_NO_ERROR); + } + else + { + 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(); + staticBuffer = nullptr; + } + + if (staticBuffer == nullptr || !offsetAligned) + { + const uint8_t *bufferData = nullptr; + gl::Error error = buffer->getData(&bufferData); + if (error.isError()) + { + return error; + } + ASSERT(bufferData != nullptr); + + error = streamIndexData(bufferData + offset, count, srcType, dstType, + primitiveRestartFixedIndexEnabled, translated); + if (error.isError()) + { + return error; + } + buffer->promoteStaticUsage(count << srcTypeInfo.bytesShift); + } + else + { + if (!staticBufferInitialized) + { + const uint8_t *bufferData = nullptr; + gl::Error error = buffer->getData(&bufferData); + if (error.isError()) + { + return error; + } + ASSERT(bufferData != nullptr); + + unsigned int convertCount = + static_cast<unsigned int>(buffer->getSize()) >> srcTypeInfo.bytesShift; + error = StreamInIndexBuffer(staticBuffer, bufferData, convertCount, srcType, dstType, + primitiveRestartFixedIndexEnabled, nullptr); + if (error.isError()) + { + return error; + } + } + 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 gl::Error(GL_NO_ERROR); +} + +gl::Error IndexDataManager::streamIndexData(const GLvoid *data, + unsigned int count, + GLenum srcType, + GLenum dstType, + bool usePrimitiveRestartFixedIndex, + TranslatedIndexData *translated) +{ + const gl::Type &dstTypeInfo = gl::GetTypeInfo(dstType); + + IndexBufferInterface *indexBuffer = nullptr; + gl::Error error = getStreamingIndexBuffer(dstType, &indexBuffer); + if (error.isError()) + { + return error; + } + ASSERT(indexBuffer != nullptr); + + unsigned int offset; + StreamInIndexBuffer(indexBuffer, data, count, srcType, dstType, usePrimitiveRestartFixedIndex, + &offset); + + translated->indexBuffer = indexBuffer->getIndexBuffer(); + translated->serial = indexBuffer->getSerial(); + translated->startIndex = (offset >> dstTypeInfo.bytesShift); + translated->startOffset = offset; + + return gl::Error(GL_NO_ERROR); +} + +gl::Error IndexDataManager::getStreamingIndexBuffer(GLenum destinationIndexType, + IndexBufferInterface **outBuffer) +{ + ASSERT(outBuffer); + if (destinationIndexType == GL_UNSIGNED_INT) + { + if (!mStreamingBufferInt) + { + mStreamingBufferInt = new StreamingIndexBufferInterface(mFactory); + gl::Error error = mStreamingBufferInt->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, + GL_UNSIGNED_INT); + if (error.isError()) + { + SafeDelete(mStreamingBufferInt); + return error; + } + } + + *outBuffer = mStreamingBufferInt; + return gl::Error(GL_NO_ERROR); + } + else + { + ASSERT(destinationIndexType == GL_UNSIGNED_SHORT); + + if (!mStreamingBufferShort) + { + mStreamingBufferShort = new StreamingIndexBufferInterface(mFactory); + gl::Error error = mStreamingBufferShort->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, + GL_UNSIGNED_SHORT); + if (error.isError()) + { + SafeDelete(mStreamingBufferShort); + return error; + } + } + + *outBuffer = mStreamingBufferShort; + return gl::Error(GL_NO_ERROR); + } +} + +} |