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

• Show log

  Commit

• Hash : 80b9528d
  Author :
  Date : 2014-05-06T13:57:43
  

  Handle buffer memory allocation failures gracefully.
  
  When we would allocate huge buffers, we would not always gracefully
  fail and return a GL error back to the application. We should be able
  to better handle buffer allocation failures with this patch.
  
  BUG=angle:634
  
  Change-Id: Ic3edce6d22b731ec52666a2a0e82f9a4fbbb23ae
  Reviewed-on: https://chromium-review.googlesource.com/197994
  Reviewed-by: Nicolas Capens <nicolascapens@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

Download

• src/libGLESv2/renderer/d3d9/VertexBuffer9.cpp

• #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/d3d9/VertexBuffer9.h"
  #include "libGLESv2/renderer/vertexconversion.h"
  #include "libGLESv2/renderer/BufferStorage.h"
  #include "libGLESv2/VertexAttribute.h"
  #include "libGLESv2/renderer/d3d9/Renderer9.h"
  #include "libGLESv2/renderer/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 &currentValue,
                                            GLint start, GLsizei count, GLsizei instances, unsigned int offset)
  {
      if (mVertexBuffer)
      {
          gl::Buffer *buffer = attrib.mBoundBuffer.get();
  
          int inputStride = attrib.stride();
          int elementSize = attrib.typeSize();
  
          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.mArrayEnabled)
          {
              if (buffer)
              {
                  BufferStorage *storage = buffer->getStorage();
                  input = static_cast<const char*>(storage->getData()) + static_cast<int>(attrib.mOffset);
              }
              else
              {
                  input = static_cast<const char*>(attrib.mPointer);
              }
          }
          else
          {
              input = reinterpret_cast<const char*>(currentValue.FloatValues);
          }
  
          if (instances == 0 || attrib.mDivisor == 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.mArrayEnabled)
      {
          unsigned int elementCount = 0;
          if (instances == 0 || attrib.mDivisor == 0)
          {
              elementCount = count;
          }
          else
          {
              if (static_cast<unsigned int>(instances) < std::numeric_limits<unsigned int>::max() - (attrib.mDivisor - 1))
              {
                  // Round up
                  elementCount = (static_cast<unsigned int>(instances) + (attrib.mDivisor - 1)) / attrib.mDivisor;
              }
              else
              {
                  elementCount = static_cast<unsigned int>(instances) / attrib.mDivisor;
              }
          }
  
          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;
      }
  }
  
  }
  

Download