diff options
Diffstat (limited to 'src/3rdparty/angle/src/libGLESv2/renderer/d3d/VertexBuffer.cpp')
-rw-r--r-- | src/3rdparty/angle/src/libGLESv2/renderer/d3d/VertexBuffer.cpp | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/d3d/VertexBuffer.cpp b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/VertexBuffer.cpp new file mode 100644 index 0000000000..901ca196a8 --- /dev/null +++ b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/VertexBuffer.cpp @@ -0,0 +1,296 @@ +#include "precompiled.h" +// +// Copyright (c) 2002-2012 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. +// + +// VertexBuffer.cpp: Defines the abstract VertexBuffer class and VertexBufferInterface +// class with derivations, classes that perform graphics API agnostic vertex buffer operations. + +#include "libGLESv2/renderer/d3d/VertexBuffer.h" +#include "libGLESv2/renderer/Renderer.h" +#include "libGLESv2/VertexAttribute.h" +#include "libGLESv2/renderer/d3d/BufferD3D.h" +#include "common/mathutil.h" + +namespace rx +{ + +unsigned int VertexBuffer::mNextSerial = 1; + +VertexBuffer::VertexBuffer() +{ + updateSerial(); +} + +VertexBuffer::~VertexBuffer() +{ +} + +void VertexBuffer::updateSerial() +{ + mSerial = mNextSerial++; +} + +unsigned int VertexBuffer::getSerial() const +{ + return mSerial; +} + +VertexBufferInterface::VertexBufferInterface(rx::Renderer *renderer, bool dynamic) : mRenderer(renderer) +{ + mDynamic = dynamic; + mWritePosition = 0; + mReservedSpace = 0; + + mVertexBuffer = renderer->createVertexBuffer(); +} + +VertexBufferInterface::~VertexBufferInterface() +{ + delete mVertexBuffer; +} + +unsigned int VertexBufferInterface::getSerial() const +{ + return mVertexBuffer->getSerial(); +} + +unsigned int VertexBufferInterface::getBufferSize() const +{ + return mVertexBuffer->getBufferSize(); +} + +bool VertexBufferInterface::setBufferSize(unsigned int size) +{ + if (mVertexBuffer->getBufferSize() == 0) + { + return mVertexBuffer->initialize(size, mDynamic); + } + else + { + return mVertexBuffer->setBufferSize(size); + } +} + +unsigned int VertexBufferInterface::getWritePosition() const +{ + return mWritePosition; +} + +void VertexBufferInterface::setWritePosition(unsigned int writePosition) +{ + mWritePosition = writePosition; +} + +bool VertexBufferInterface::discard() +{ + return mVertexBuffer->discard(); +} + +bool VertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue, + GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset) +{ + unsigned int spaceRequired; + if (!mVertexBuffer->getSpaceRequired(attrib, count, instances, &spaceRequired)) + { + return false; + } + + if (mWritePosition + spaceRequired < mWritePosition) + { + return false; + } + + if (!reserveSpace(mReservedSpace)) + { + return false; + } + mReservedSpace = 0; + + if (!mVertexBuffer->storeVertexAttributes(attrib, currentValue, start, count, instances, mWritePosition)) + { + return false; + } + + if (outStreamOffset) + { + *outStreamOffset = mWritePosition; + } + + mWritePosition += spaceRequired; + + // Align to 16-byte boundary + mWritePosition = rx::roundUp(mWritePosition, 16u); + + return true; +} + +bool VertexBufferInterface::reserveVertexSpace(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances) +{ + unsigned int requiredSpace; + if (!mVertexBuffer->getSpaceRequired(attrib, count, instances, &requiredSpace)) + { + return false; + } + + // Protect against integer overflow + if (mReservedSpace + requiredSpace < mReservedSpace) + { + return false; + } + + mReservedSpace += requiredSpace; + + // Align to 16-byte boundary + mReservedSpace = rx::roundUp(mReservedSpace, 16u); + + return true; +} + +VertexBuffer* VertexBufferInterface::getVertexBuffer() const +{ + return mVertexBuffer; +} + +bool VertexBufferInterface::directStoragePossible(const gl::VertexAttribute &attrib, + const gl::VertexAttribCurrentValueData ¤tValue) const +{ + gl::Buffer *buffer = attrib.buffer.get(); + BufferD3D *storage = buffer ? BufferD3D::makeBufferD3D(buffer->getImplementation()) : NULL; + + if (!storage || !storage->supportsDirectBinding()) + { + return false; + } + + // Alignment restrictions: In D3D, vertex data must be aligned to + // the format stride, or to a 4-byte boundary, whichever is smaller. + // (Undocumented, and experimentally confirmed) + size_t alignment = 4; + bool requiresConversion = false; + + if (attrib.type != GL_FLOAT) + { + gl::VertexFormat vertexFormat(attrib, currentValue.Type); + + unsigned int outputElementSize; + getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize); + alignment = std::min<size_t>(outputElementSize, 4); + + requiresConversion = (mRenderer->getVertexConversionType(vertexFormat) & VERTEX_CONVERT_CPU) != 0; + } + + bool isAligned = (static_cast<size_t>(ComputeVertexAttributeStride(attrib)) % alignment == 0) && + (static_cast<size_t>(attrib.offset) % alignment == 0); + + return !requiresConversion && isAligned; +} + +StreamingVertexBufferInterface::StreamingVertexBufferInterface(rx::Renderer *renderer, std::size_t initialSize) : VertexBufferInterface(renderer, true) +{ + setBufferSize(initialSize); +} + +StreamingVertexBufferInterface::~StreamingVertexBufferInterface() +{ +} + +bool StreamingVertexBufferInterface::reserveSpace(unsigned int size) +{ + bool result = true; + unsigned int curBufferSize = getBufferSize(); + if (size > curBufferSize) + { + result = setBufferSize(std::max(size, 3 * curBufferSize / 2)); + setWritePosition(0); + } + else if (getWritePosition() + size > curBufferSize) + { + if (!discard()) + { + return false; + } + setWritePosition(0); + } + + return result; +} + +StaticVertexBufferInterface::StaticVertexBufferInterface(rx::Renderer *renderer) : VertexBufferInterface(renderer, false) +{ +} + +StaticVertexBufferInterface::~StaticVertexBufferInterface() +{ +} + +bool StaticVertexBufferInterface::lookupAttribute(const gl::VertexAttribute &attrib, unsigned int *outStreamOffset) +{ + for (unsigned int element = 0; element < mCache.size(); element++) + { + if (mCache[element].type == attrib.type && + mCache[element].size == attrib.size && + mCache[element].stride == ComputeVertexAttributeStride(attrib) && + mCache[element].normalized == attrib.normalized && + mCache[element].pureInteger == attrib.pureInteger) + { + size_t offset = (static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib)); + if (mCache[element].attributeOffset == offset) + { + if (outStreamOffset) + { + *outStreamOffset = mCache[element].streamOffset; + } + return true; + } + } + } + + return false; +} + +bool StaticVertexBufferInterface::reserveSpace(unsigned int size) +{ + unsigned int curSize = getBufferSize(); + if (curSize == 0) + { + setBufferSize(size); + return true; + } + else if (curSize >= size) + { + return true; + } + else + { + UNREACHABLE(); // Static vertex buffers can't be resized + return false; + } +} + +bool StaticVertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue, + GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset) +{ + unsigned int streamOffset; + if (VertexBufferInterface::storeVertexAttributes(attrib, currentValue, start, count, instances, &streamOffset)) + { + size_t attributeOffset = static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib); + VertexElement element = { attrib.type, attrib.size, ComputeVertexAttributeStride(attrib), attrib.normalized, attrib.pureInteger, attributeOffset, streamOffset }; + mCache.push_back(element); + + if (outStreamOffset) + { + *outStreamOffset = streamOffset; + } + + return true; + } + else + { + return false; + } +} + +} |