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#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.
//
// VertexBuffer9.cpp: Defines the D3D9 VertexBuffer implementation.
#include "libGLESv2/renderer/d3d/d3d9/VertexBuffer9.h"
#include "libGLESv2/renderer/vertexconversion.h"
#include "libGLESv2/renderer/BufferImpl.h"
#include "libGLESv2/VertexAttribute.h"
#include "libGLESv2/renderer/d3d/d3d9/Renderer9.h"
#include "libGLESv2/renderer/d3d/d3d9/formatutils9.h"
#include "libGLESv2/Buffer.h"
namespace rx
{
VertexBuffer9::VertexBuffer9(rx::Renderer9 *const renderer) : mRenderer(renderer)
{
mVertexBuffer = NULL;
mBufferSize = 0;
mDynamicUsage = false;
}
VertexBuffer9::~VertexBuffer9()
{
SafeRelease(mVertexBuffer);
}
bool VertexBuffer9::initialize(unsigned int size, bool dynamicUsage)
{
SafeRelease(mVertexBuffer);
updateSerial();
if (size > 0)
{
DWORD flags = D3DUSAGE_WRITEONLY;
if (dynamicUsage)
{
flags |= D3DUSAGE_DYNAMIC;
}
HRESULT result = mRenderer->createVertexBuffer(size, flags, &mVertexBuffer);
if (FAILED(result))
{
ERR("Out of memory allocating a vertex buffer of size %lu.", size);
return false;
}
}
mBufferSize = size;
mDynamicUsage = dynamicUsage;
return true;
}
VertexBuffer9 *VertexBuffer9::makeVertexBuffer9(VertexBuffer *vertexBuffer)
{
ASSERT(HAS_DYNAMIC_TYPE(VertexBuffer9*, vertexBuffer));
return static_cast<VertexBuffer9*>(vertexBuffer);
}
bool VertexBuffer9::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue,
GLint start, GLsizei count, GLsizei instances, unsigned int offset)
{
if (mVertexBuffer)
{
gl::Buffer *buffer = attrib.buffer.get();
int inputStride = gl::ComputeVertexAttributeStride(attrib);
int elementSize = gl::ComputeVertexAttributeTypeSize(attrib);
DWORD lockFlags = mDynamicUsage ? D3DLOCK_NOOVERWRITE : 0;
void *mapPtr = NULL;
unsigned int mapSize;
if (!spaceRequired(attrib, count, instances, &mapSize))
{
return false;
}
HRESULT result = mVertexBuffer->Lock(offset, mapSize, &mapPtr, lockFlags);
if (FAILED(result))
{
ERR("Lock failed with error 0x%08x", result);
return false;
}
const char *input = NULL;
if (attrib.enabled)
{
if (buffer)
{
BufferImpl *storage = buffer->getImplementation();
input = static_cast<const char*>(storage->getData()) + static_cast<int>(attrib.offset);
}
else
{
input = static_cast<const char*>(attrib.pointer);
}
}
else
{
input = reinterpret_cast<const char*>(currentValue.FloatValues);
}
if (instances == 0 || attrib.divisor == 0)
{
input += inputStride * start;
}
gl::VertexFormat vertexFormat(attrib, currentValue.Type);
bool needsConversion = (d3d9::GetVertexConversionType(vertexFormat) & VERTEX_CONVERT_CPU) > 0;
if (!needsConversion && inputStride == elementSize)
{
size_t copySize = static_cast<size_t>(count) * static_cast<size_t>(inputStride);
memcpy(mapPtr, input, copySize);
}
else
{
VertexCopyFunction copyFunction = d3d9::GetVertexCopyFunction(vertexFormat);
copyFunction(input, inputStride, count, mapPtr);
}
mVertexBuffer->Unlock();
return true;
}
else
{
ERR("Vertex buffer not initialized.");
return false;
}
}
bool VertexBuffer9::getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances,
unsigned int *outSpaceRequired) const
{
return spaceRequired(attrib, count, instances, outSpaceRequired);
}
unsigned int VertexBuffer9::getBufferSize() const
{
return mBufferSize;
}
bool VertexBuffer9::setBufferSize(unsigned int size)
{
if (size > mBufferSize)
{
return initialize(size, mDynamicUsage);
}
else
{
return true;
}
}
bool VertexBuffer9::discard()
{
if (mVertexBuffer)
{
void *dummy;
HRESULT result;
result = mVertexBuffer->Lock(0, 1, &dummy, D3DLOCK_DISCARD);
if (FAILED(result))
{
ERR("Discard lock failed with error 0x%08x", result);
return false;
}
result = mVertexBuffer->Unlock();
if (FAILED(result))
{
ERR("Discard unlock failed with error 0x%08x", result);
return false;
}
return true;
}
else
{
ERR("Vertex buffer not initialized.");
return false;
}
}
IDirect3DVertexBuffer9 * VertexBuffer9::getBuffer() const
{
return mVertexBuffer;
}
bool VertexBuffer9::spaceRequired(const gl::VertexAttribute &attrib, std::size_t count, GLsizei instances,
unsigned int *outSpaceRequired)
{
gl::VertexFormat vertexFormat(attrib, GL_FLOAT);
unsigned int elementSize = d3d9::GetVertexElementSize(vertexFormat);
if (attrib.enabled)
{
unsigned int elementCount = 0;
if (instances == 0 || attrib.divisor == 0)
{
elementCount = count;
}
else
{
if (static_cast<unsigned int>(instances) < std::numeric_limits<unsigned int>::max() - (attrib.divisor - 1))
{
// Round up
elementCount = (static_cast<unsigned int>(instances) + (attrib.divisor - 1)) / attrib.divisor;
}
else
{
elementCount = static_cast<unsigned int>(instances) / attrib.divisor;
}
}
if (elementSize <= std::numeric_limits<unsigned int>::max() / elementCount)
{
if (outSpaceRequired)
{
*outSpaceRequired = elementSize * elementCount;
}
return true;
}
else
{
return false;
}
}
else
{
const unsigned int elementSize = 4;
if (outSpaceRequired)
{
*outSpaceRequired = elementSize * 4;
}
return true;
}
}
}
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