kc3-lang/angle/src/libGLESv2/renderer/d3d/d3d9/VertexBuffer9.cpp

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• Hash : f7100b98
  Author :
  Date : 2014-09-08T16:17:08
  

  Updated the vertex buffer classes to use Error objects.
  
  BUG=angle:520
  
  Change-Id: Id003e66b2acbf37dbbe66aaca2fa336c3c884be2
  Reviewed-on: https://chromium-review.googlesource.com/217102
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libGLESv2/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 "libGLESv2/renderer/d3d/d3d9/VertexBuffer9.h"
  #include "libGLESv2/renderer/d3d/d3d9/Renderer9.h"
  #include "libGLESv2/renderer/d3d/d3d9/formatutils9.h"
  #include "libGLESv2/renderer/vertexconversion.h"
  #include "libGLESv2/renderer/BufferImpl.h"
  #include "libGLESv2/VertexAttribute.h"
  #include "libGLESv2/Buffer.h"
  
  namespace rx
  {
  
  VertexBuffer9::VertexBuffer9(rx::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);
  }
  
  VertexBuffer9 *VertexBuffer9::makeVertexBuffer9(VertexBuffer *vertexBuffer)
  {
      ASSERT(HAS_DYNAMIC_TYPE(VertexBuffer9*, vertexBuffer));
      return static_cast<VertexBuffer9*>(vertexBuffer);
  }
  
  gl::Error VertexBuffer9::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData &currentValue,
                                                 GLint start, GLsizei count, GLsizei instances, unsigned int offset)
  {
      if (!mVertexBuffer)
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      gl::Buffer *buffer = attrib.buffer.get();
  
      int inputStride = gl::ComputeVertexAttributeStride(attrib);
      int elementSize = gl::ComputeVertexAttributeTypeSize(attrib);
  
      DWORD lockFlags = mDynamicUsage ? D3DLOCK_NOOVERWRITE : 0;
  
      uint8_t *mapPtr = NULL;
  
      unsigned int mapSize;
      gl::Error error = spaceRequired(attrib, count, instances, &mapSize);
      if (error.isError())
      {
          return error;
      }
  
      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 = NULL;
      if (attrib.enabled)
      {
          if (buffer)
          {
              BufferImpl *storage = buffer->getImplementation();
              input = static_cast<const uint8_t*>(storage->getData()) + static_cast<int>(attrib.offset);
          }
          else
          {
              input = static_cast<const uint8_t*>(attrib.pointer);
          }
      }
      else
      {
          input = reinterpret_cast<const uint8_t*>(currentValue.FloatValues);
      }
  
      if (instances == 0 || attrib.divisor == 0)
      {
          input += inputStride * start;
      }
  
      gl::VertexFormat vertexFormat(attrib, currentValue.Type);
      const d3d9::VertexFormat &d3dVertexInfo = d3d9::GetVertexFormatInfo(mRenderer->getCapsDeclTypes(), vertexFormat);
      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);
  }
  
  gl::Error 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;
  }
  
  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;
  }
  
  gl::Error VertexBuffer9::spaceRequired(const gl::VertexAttribute &attrib, std::size_t count, GLsizei instances,
                                         unsigned int *outSpaceRequired) const
  {
      gl::VertexFormat vertexFormat(attrib, GL_FLOAT);
      const d3d9::VertexFormat &d3d9VertexInfo = d3d9::GetVertexFormatInfo(mRenderer->getCapsDeclTypes(), vertexFormat);
  
      if (attrib.enabled)
      {
          unsigned int elementCount = 0;
          if (instances == 0 || attrib.divisor == 0)
          {
              elementCount = count;
          }
          else
          {
              // Round up to divisor, if possible
              elementCount = rx::UnsignedCeilDivide(static_cast<unsigned int>(instances), attrib.divisor);
          }
  
          if (d3d9VertexInfo.outputElementSize <= std::numeric_limits<unsigned int>::max() / elementCount)
          {
              if (outSpaceRequired)
              {
                  *outSpaceRequired = d3d9VertexInfo.outputElementSize * elementCount;
              }
              return gl::Error(GL_NO_ERROR);
          }
          else
          {
              return gl::Error(GL_OUT_OF_MEMORY, "New vertex buffer size would result in an overflow.");
          }
      }
      else
      {
          const unsigned int elementSize = 4;
          if (outSpaceRequired)
          {
              *outSpaceRequired = elementSize * 4;
          }
          return gl::Error(GL_NO_ERROR);
      }
  }
  
  }
  

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