kc3-lang/angle/src/libANGLE/renderer/d3d/d3d9/VertexBuffer9.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/d3d9/VertexBuffer9.cpp

• //
  // 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 "libANGLE/renderer/d3d/d3d9/VertexBuffer9.h"
  #include "libANGLE/renderer/d3d/d3d9/Renderer9.h"
  #include "libANGLE/renderer/d3d/d3d9/formatutils9.h"
  #include "libANGLE/renderer/d3d/d3d9/vertexconversion.h"
  #include "libANGLE/renderer/d3d/BufferD3D.h"
  #include "libANGLE/VertexAttribute.h"
  #include "libANGLE/Buffer.h"
  
  namespace rx
  {
  
  VertexBuffer9::VertexBuffer9(Renderer9 *renderer) : mRenderer(renderer)
  {
      mVertexBuffer = NULL;
      mBufferSize = 0;
      mDynamicUsage = false;
  }
  
  VertexBuffer9::~VertexBuffer9()
  {
      SafeRelease(mVertexBuffer);
  }
  
  gl::Error 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))
          {
              return gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate internal vertex buffer of size, %lu.", size);
          }
      }
  
      mBufferSize = size;
      mDynamicUsage = dynamicUsage;
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error VertexBuffer9::storeVertexAttributes(const gl::VertexAttribute &attrib,
                                                 GLenum currentValueType,
                                                 GLint start,
                                                 GLsizei count,
                                                 GLsizei instances,
                                                 unsigned int offset,
                                                 const uint8_t *sourceData)
  {
      if (!mVertexBuffer)
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      int inputStride = static_cast<int>(gl::ComputeVertexAttributeStride(attrib));
      int elementSize = static_cast<int>(gl::ComputeVertexAttributeTypeSize(attrib));
  
      DWORD lockFlags = mDynamicUsage ? D3DLOCK_NOOVERWRITE : 0;
  
      uint8_t *mapPtr = nullptr;
  
      auto errorOrMapSize = mRenderer->getVertexSpaceRequired(attrib, count, instances);
      if (errorOrMapSize.isError())
      {
          return errorOrMapSize.getError();
      }
  
      unsigned int mapSize = errorOrMapSize.getResult();
  
      HRESULT result = mVertexBuffer->Lock(offset, mapSize, reinterpret_cast<void**>(&mapPtr), lockFlags);
      if (FAILED(result))
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Failed to lock internal vertex buffer, HRESULT: 0x%08x.", result);
      }
  
      const uint8_t *input = sourceData;
  
      if (instances == 0 || attrib.divisor == 0)
      {
          input += inputStride * start;
      }
  
      gl::VertexFormatType vertexFormatType = gl::GetVertexFormatType(attrib, currentValueType);
      const d3d9::VertexFormat &d3dVertexInfo = d3d9::GetVertexFormatInfo(mRenderer->getCapsDeclTypes(), vertexFormatType);
      bool needsConversion = (d3dVertexInfo.conversionType & 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
      {
          d3dVertexInfo.copyFunction(input, inputStride, count, mapPtr);
      }
  
      mVertexBuffer->Unlock();
  
      return gl::Error(GL_NO_ERROR);
  }
  
  unsigned int VertexBuffer9::getBufferSize() const
  {
      return mBufferSize;
  }
  
  gl::Error VertexBuffer9::setBufferSize(unsigned int size)
  {
      if (size > mBufferSize)
      {
          return initialize(size, mDynamicUsage);
      }
      else
      {
          return gl::Error(GL_NO_ERROR);
      }
  }
  
  gl::Error VertexBuffer9::discard()
  {
      if (!mVertexBuffer)
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      void *dummy;
      HRESULT result;
  
      result = mVertexBuffer->Lock(0, 1, &dummy, D3DLOCK_DISCARD);
      if (FAILED(result))
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Failed to lock internal buffer for discarding, HRESULT: 0x%08x", result);
      }
  
      result = mVertexBuffer->Unlock();
      if (FAILED(result))
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Failed to unlock internal buffer for discarding, HRESULT: 0x%08x", result);
      }
  
      return gl::Error(GL_NO_ERROR);
  }
  
  IDirect3DVertexBuffer9 * VertexBuffer9::getBuffer() const
  {
      return mVertexBuffer;
  }
  }  // namespace rx
  

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