diff options
Diffstat (limited to 'src/3rdparty/angle/src/libGLESv2/renderer/IndexDataManager.cpp')
-rw-r--r-- | src/3rdparty/angle/src/libGLESv2/renderer/IndexDataManager.cpp | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/IndexDataManager.cpp b/src/3rdparty/angle/src/libGLESv2/renderer/IndexDataManager.cpp new file mode 100644 index 0000000000..84b79b4109 --- /dev/null +++ b/src/3rdparty/angle/src/libGLESv2/renderer/IndexDataManager.cpp @@ -0,0 +1,316 @@ +#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. +// + +// IndexDataManager.cpp: Defines the IndexDataManager, a class that +// runs the Buffer translation process for index buffers. + +#include "libGLESv2/renderer/IndexDataManager.h" +#include "libGLESv2/renderer/BufferStorage.h" + +#include "libGLESv2/Buffer.h" +#include "libGLESv2/main.h" +#include "libGLESv2/renderer/IndexBuffer.h" + +namespace rx +{ + +IndexDataManager::IndexDataManager(Renderer *renderer) : mRenderer(renderer) +{ + mStreamingBufferShort = new StreamingIndexBufferInterface(mRenderer); + if (!mStreamingBufferShort->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, GL_UNSIGNED_SHORT)) + { + delete mStreamingBufferShort; + mStreamingBufferShort = NULL; + } + + mStreamingBufferInt = new StreamingIndexBufferInterface(mRenderer); + if (!mStreamingBufferInt->reserveBufferSpace(INITIAL_INDEX_BUFFER_SIZE, GL_UNSIGNED_INT)) + { + delete mStreamingBufferInt; + mStreamingBufferInt = NULL; + } + + if (!mStreamingBufferShort) + { + // Make sure both buffers are deleted. + delete mStreamingBufferInt; + mStreamingBufferInt = NULL; + + ERR("Failed to allocate the streaming index buffer(s)."); + } + + mCountingBuffer = NULL; +} + +IndexDataManager::~IndexDataManager() +{ + delete mStreamingBufferShort; + delete mStreamingBufferInt; + delete mCountingBuffer; +} + +static unsigned int indexTypeSize(GLenum type) +{ + switch (type) + { + case GL_UNSIGNED_INT: return sizeof(GLuint); + case GL_UNSIGNED_SHORT: return sizeof(GLushort); + case GL_UNSIGNED_BYTE: return sizeof(GLubyte); + default: UNREACHABLE(); return sizeof(GLushort); + } +} + +static void convertIndices(GLenum type, const void *input, GLsizei count, void *output) +{ + if (type == GL_UNSIGNED_BYTE) + { + const GLubyte *in = static_cast<const GLubyte*>(input); + GLushort *out = static_cast<GLushort*>(output); + + for (GLsizei i = 0; i < count; i++) + { + out[i] = in[i]; + } + } + else if (type == GL_UNSIGNED_INT) + { + memcpy(output, input, count * sizeof(GLuint)); + } + else if (type == GL_UNSIGNED_SHORT) + { + memcpy(output, input, count * sizeof(GLushort)); + } + else UNREACHABLE(); +} + +template <class IndexType> +static void computeRange(const IndexType *indices, GLsizei count, GLuint *minIndex, GLuint *maxIndex) +{ + *minIndex = indices[0]; + *maxIndex = indices[0]; + + for (GLsizei i = 0; i < count; i++) + { + if (*minIndex > indices[i]) *minIndex = indices[i]; + if (*maxIndex < indices[i]) *maxIndex = indices[i]; + } +} + +static void computeRange(GLenum type, const GLvoid *indices, GLsizei count, GLuint *minIndex, GLuint *maxIndex) +{ + if (type == GL_UNSIGNED_BYTE) + { + computeRange(static_cast<const GLubyte*>(indices), count, minIndex, maxIndex); + } + else if (type == GL_UNSIGNED_INT) + { + computeRange(static_cast<const GLuint*>(indices), count, minIndex, maxIndex); + } + else if (type == GL_UNSIGNED_SHORT) + { + computeRange(static_cast<const GLushort*>(indices), count, minIndex, maxIndex); + } + else UNREACHABLE(); +} + +GLenum IndexDataManager::prepareIndexData(GLenum type, GLsizei count, gl::Buffer *buffer, const GLvoid *indices, TranslatedIndexData *translated) +{ + if (!mStreamingBufferShort) + { + return GL_OUT_OF_MEMORY; + } + + GLenum destinationIndexType = (type == GL_UNSIGNED_INT) ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT; + intptr_t offset = reinterpret_cast<intptr_t>(indices); + bool alignedOffset = false; + + BufferStorage *storage = NULL; + + if (buffer != NULL) + { + storage = buffer->getStorage(); + + switch (type) + { + case GL_UNSIGNED_BYTE: alignedOffset = (offset % sizeof(GLubyte) == 0); break; + case GL_UNSIGNED_SHORT: alignedOffset = (offset % sizeof(GLushort) == 0); break; + case GL_UNSIGNED_INT: alignedOffset = (offset % sizeof(GLuint) == 0); break; + default: UNREACHABLE(); alignedOffset = false; + } + + if (indexTypeSize(type) * count + offset > storage->getSize()) + { + return GL_INVALID_OPERATION; + } + + indices = static_cast<const GLubyte*>(storage->getData()) + offset; + } + + StreamingIndexBufferInterface *streamingBuffer = (type == GL_UNSIGNED_INT) ? mStreamingBufferInt : mStreamingBufferShort; + + StaticIndexBufferInterface *staticBuffer = buffer ? buffer->getStaticIndexBuffer() : NULL; + IndexBufferInterface *indexBuffer = streamingBuffer; + bool directStorage = alignedOffset && storage && storage->supportsDirectBinding() && + destinationIndexType == type; + UINT streamOffset = 0; + + if (directStorage) + { + indexBuffer = streamingBuffer; + streamOffset = offset; + storage->markBufferUsage(); + computeRange(type, indices, count, &translated->minIndex, &translated->maxIndex); + } + else if (staticBuffer && staticBuffer->getBufferSize() != 0 && staticBuffer->getIndexType() == type && alignedOffset) + { + indexBuffer = staticBuffer; + streamOffset = staticBuffer->lookupRange(offset, count, &translated->minIndex, &translated->maxIndex); + + if (streamOffset == -1) + { + streamOffset = (offset / indexTypeSize(type)) * indexTypeSize(destinationIndexType); + computeRange(type, indices, count, &translated->minIndex, &translated->maxIndex); + staticBuffer->addRange(offset, count, translated->minIndex, translated->maxIndex, streamOffset); + } + } + else + { + int convertCount = count; + + if (staticBuffer) + { + if (staticBuffer->getBufferSize() == 0 && alignedOffset) + { + indexBuffer = staticBuffer; + convertCount = storage->getSize() / indexTypeSize(type); + } + else + { + buffer->invalidateStaticData(); + staticBuffer = NULL; + } + } + + if (!indexBuffer) + { + ERR("No valid index buffer."); + return GL_INVALID_OPERATION; + } + + unsigned int bufferSizeRequired = convertCount * indexTypeSize(destinationIndexType); + indexBuffer->reserveBufferSpace(bufferSizeRequired, type); + + void* output = NULL; + streamOffset = indexBuffer->mapBuffer(bufferSizeRequired, &output); + if (streamOffset == -1 || output == NULL) + { + ERR("Failed to map index buffer."); + return GL_OUT_OF_MEMORY; + } + + convertIndices(type, staticBuffer ? storage->getData() : indices, convertCount, output); + + if (!indexBuffer->unmapBuffer()) + { + ERR("Failed to unmap index buffer."); + return GL_OUT_OF_MEMORY; + } + + computeRange(type, indices, count, &translated->minIndex, &translated->maxIndex); + + if (staticBuffer) + { + streamOffset = (offset / indexTypeSize(type)) * indexTypeSize(destinationIndexType); + staticBuffer->addRange(offset, count, translated->minIndex, translated->maxIndex, streamOffset); + } + } + + translated->storage = directStorage ? storage : NULL; + translated->indexBuffer = indexBuffer->getIndexBuffer(); + translated->serial = directStorage ? storage->getSerial() : indexBuffer->getSerial(); + translated->startIndex = streamOffset / indexTypeSize(destinationIndexType); + translated->startOffset = streamOffset; + + if (buffer) + { + buffer->promoteStaticUsage(count * indexTypeSize(type)); + } + + return GL_NO_ERROR; +} + +StaticIndexBufferInterface *IndexDataManager::getCountingIndices(GLsizei count) +{ + if (count <= 65536) // 16-bit indices + { + const unsigned int spaceNeeded = count * sizeof(unsigned short); + + if (!mCountingBuffer || mCountingBuffer->getBufferSize() < spaceNeeded) + { + delete mCountingBuffer; + mCountingBuffer = new StaticIndexBufferInterface(mRenderer); + mCountingBuffer->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_SHORT); + + void* mappedMemory = NULL; + if (mCountingBuffer->mapBuffer(spaceNeeded, &mappedMemory) == -1 || mappedMemory == NULL) + { + ERR("Failed to map counting buffer."); + return NULL; + } + + unsigned short *data = reinterpret_cast<unsigned short*>(mappedMemory); + for(int i = 0; i < count; i++) + { + data[i] = i; + } + + if (!mCountingBuffer->unmapBuffer()) + { + ERR("Failed to unmap counting buffer."); + return NULL; + } + } + } + else if (mStreamingBufferInt) // 32-bit indices supported + { + const unsigned int spaceNeeded = count * sizeof(unsigned int); + + if (!mCountingBuffer || mCountingBuffer->getBufferSize() < spaceNeeded) + { + delete mCountingBuffer; + mCountingBuffer = new StaticIndexBufferInterface(mRenderer); + mCountingBuffer->reserveBufferSpace(spaceNeeded, GL_UNSIGNED_INT); + + void* mappedMemory = NULL; + if (mCountingBuffer->mapBuffer(spaceNeeded, &mappedMemory) == -1 || mappedMemory == NULL) + { + ERR("Failed to map counting buffer."); + return NULL; + } + + unsigned int *data = reinterpret_cast<unsigned int*>(mappedMemory); + for(int i = 0; i < count; i++) + { + data[i] = i; + } + + if (!mCountingBuffer->unmapBuffer()) + { + ERR("Failed to unmap counting buffer."); + return NULL; + } + } + } + else + { + return NULL; + } + + return mCountingBuffer; +} + +} |