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#include "precompiled.h"
//
// Copyright (c) 2013 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.
//
// VertexBuffer11.cpp: Defines the D3D11 VertexBuffer implementation.
#include "libGLESv2/renderer/d3d/d3d11/VertexBuffer11.h"
#include "libGLESv2/renderer/d3d/d3d11/Buffer11.h"
#include "libGLESv2/Buffer.h"
#include "libGLESv2/renderer/d3d/d3d11/Renderer11.h"
#include "libGLESv2/VertexAttribute.h"
#include "libGLESv2/renderer/d3d/d3d11/formatutils11.h"
namespace rx
{
VertexBuffer11::VertexBuffer11(rx::Renderer11 *const renderer) : mRenderer(renderer)
{
mBuffer = NULL;
mBufferSize = 0;
mDynamicUsage = false;
}
VertexBuffer11::~VertexBuffer11()
{
SafeRelease(mBuffer);
}
bool VertexBuffer11::initialize(unsigned int size, bool dynamicUsage)
{
SafeRelease(mBuffer);
updateSerial();
if (size > 0)
{
ID3D11Device* dxDevice = mRenderer->getDevice();
D3D11_BUFFER_DESC bufferDesc;
bufferDesc.ByteWidth = size;
bufferDesc.Usage = D3D11_USAGE_DYNAMIC;
bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
bufferDesc.MiscFlags = 0;
bufferDesc.StructureByteStride = 0;
HRESULT result = dxDevice->CreateBuffer(&bufferDesc, NULL, &mBuffer);
if (FAILED(result))
{
return false;
}
}
mBufferSize = size;
mDynamicUsage = dynamicUsage;
return true;
}
VertexBuffer11 *VertexBuffer11::makeVertexBuffer11(VertexBuffer *vetexBuffer)
{
ASSERT(HAS_DYNAMIC_TYPE(VertexBuffer11*, vetexBuffer));
return static_cast<VertexBuffer11*>(vetexBuffer);
}
bool VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue,
GLint start, GLsizei count, GLsizei instances, unsigned int offset)
{
if (mBuffer)
{
gl::Buffer *buffer = attrib.buffer.get();
int inputStride = ComputeVertexAttributeStride(attrib);
ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
if (FAILED(result))
{
ERR("Vertex buffer map failed with error 0x%08x", result);
return false;
}
char* output = reinterpret_cast<char*>(mappedResource.pData) + offset;
const char *input = NULL;
if (attrib.enabled)
{
if (buffer)
{
Buffer11 *storage = Buffer11::makeBuffer11(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);
VertexCopyFunction conversionFunc = gl_d3d11::GetVertexCopyFunction(vertexFormat);
ASSERT(conversionFunc != NULL);
conversionFunc(input, inputStride, count, output);
dxContext->Unmap(mBuffer, 0);
return true;
}
else
{
ERR("Vertex buffer not initialized.");
return false;
}
}
bool VertexBuffer11::getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count,
GLsizei instances, unsigned int *outSpaceRequired) const
{
unsigned int elementCount = 0;
if (attrib.enabled)
{
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 = rx::roundUp(static_cast<unsigned int>(instances), attrib.divisor);
}
else
{
elementCount = instances / attrib.divisor;
}
}
gl::VertexFormat vertexFormat(attrib);
unsigned int elementSize = static_cast<unsigned int>(gl_d3d11::GetVertexElementSize(vertexFormat));
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;
}
}
unsigned int VertexBuffer11::getBufferSize() const
{
return mBufferSize;
}
bool VertexBuffer11::setBufferSize(unsigned int size)
{
if (size > mBufferSize)
{
return initialize(size, mDynamicUsage);
}
else
{
return true;
}
}
bool VertexBuffer11::discard()
{
if (mBuffer)
{
ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
if (FAILED(result))
{
ERR("Vertex buffer map failed with error 0x%08x", result);
return false;
}
dxContext->Unmap(mBuffer, 0);
return true;
}
else
{
ERR("Vertex buffer not initialized.");
return false;
}
}
ID3D11Buffer *VertexBuffer11::getBuffer() const
{
return mBuffer;
}
}
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