kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/VertexBuffer11.cpp

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• Hash : d8fa9215
  Author :
  Date : 2016-03-02T11:51:43
  

  D3D: Refactor VertexBuffer::getSpaceRequired.
  
  By making this a virtual call to BufferFactoryD3D (aka RendererD3D),
  we can also stop having side-effects in the BufferD3D class of
  creating a static buffer storage when we only want to know the space
  required for some vertex elements.
  
  This refactoring will aid implementation of VertexArray11 dirty bits.
  
  BUG=angleproject:1327
  
  Change-Id: I0e34c6e9f5da35edebc179d578ad9392dc0166db
  Reviewed-on: https://chromium-review.googlesource.com/329741
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/VertexBuffer11.cpp

• //
  // 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 "libANGLE/renderer/d3d/d3d11/VertexBuffer11.h"
  
  #include "libANGLE/Buffer.h"
  #include "libANGLE/VertexAttribute.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/d3d/d3d11/Buffer11.h"
  #include "libANGLE/renderer/d3d/d3d11/formatutils11.h"
  #include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  namespace rx
  {
  
  VertexBuffer11::VertexBuffer11(Renderer11 *const renderer) : mRenderer(renderer)
  {
      mBuffer = NULL;
      mBufferSize = 0;
      mDynamicUsage = false;
      mMappedResourceData = NULL;
  }
  
  VertexBuffer11::~VertexBuffer11()
  {
      ASSERT(mMappedResourceData == NULL);
      SafeRelease(mBuffer);
  }
  
  gl::Error 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 gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate internal vertex buffer of size, %lu.", size);
          }
  
          if (dynamicUsage)
          {
              d3d11::SetDebugName(mBuffer, "VertexBuffer11 (dynamic)");
          }
          else
          {
              d3d11::SetDebugName(mBuffer, "VertexBuffer11 (static)");
          }
      }
  
      mBufferSize = size;
      mDynamicUsage = dynamicUsage;
  
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error VertexBuffer11::mapResource()
  {
      if (mMappedResourceData == NULL)
      {
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
          D3D11_MAPPED_SUBRESOURCE mappedResource;
  
          HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
          if (FAILED(result))
          {
              return gl::Error(GL_OUT_OF_MEMORY, "Failed to map internal vertex buffer, HRESULT: 0x%08x.", result);
          }
  
          mMappedResourceData = reinterpret_cast<uint8_t*>(mappedResource.pData);
      }
  
      return gl::Error(GL_NO_ERROR);
  }
  
  void VertexBuffer11::hintUnmapResource()
  {
      if (mMappedResourceData != NULL)
      {
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
          dxContext->Unmap(mBuffer, 0);
  
          mMappedResourceData = NULL;
      }
  }
  
  gl::Error VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib,
                                                  GLenum currentValueType,
                                                  GLint start,
                                                  GLsizei count,
                                                  GLsizei instances,
                                                  unsigned int offset,
                                                  const uint8_t *sourceData)
  {
      if (!mBuffer)
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      int inputStride = static_cast<int>(ComputeVertexAttributeStride(attrib));
  
      // This will map the resource if it isn't already mapped.
      gl::Error error = mapResource();
      if (error.isError())
      {
          return error;
      }
  
      uint8_t *output = mMappedResourceData + offset;
  
      const uint8_t *input = sourceData;
  
      if (instances == 0 || attrib.divisor == 0)
      {
          input += inputStride * start;
      }
  
      gl::VertexFormatType vertexFormatType = gl::GetVertexFormatType(attrib, currentValueType);
      const D3D_FEATURE_LEVEL featureLevel = mRenderer->getRenderer11DeviceCaps().featureLevel;
      const d3d11::VertexFormat &vertexFormatInfo = d3d11::GetVertexFormatInfo(vertexFormatType, featureLevel);
      ASSERT(vertexFormatInfo.copyFunction != NULL);
      vertexFormatInfo.copyFunction(input, inputStride, count, output);
  
      return gl::Error(GL_NO_ERROR);
  }
  
  unsigned int VertexBuffer11::getBufferSize() const
  {
      return mBufferSize;
  }
  
  gl::Error VertexBuffer11::setBufferSize(unsigned int size)
  {
      if (size > mBufferSize)
      {
          return initialize(size, mDynamicUsage);
      }
      else
      {
          return gl::Error(GL_NO_ERROR);
      }
  }
  
  gl::Error VertexBuffer11::discard()
  {
      if (!mBuffer)
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
      if (FAILED(result))
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Failed to map internal buffer for discarding, HRESULT: 0x%08x", result);
      }
  
      dxContext->Unmap(mBuffer, 0);
  
      return gl::Error(GL_NO_ERROR);
  }
  
  ID3D11Buffer *VertexBuffer11::getBuffer() const
  {
      return mBuffer;
  }
  
  }  // namespace rx
  

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