kc3-lang/angle/src/libANGLE/renderer/d3d/BufferD3D.cpp

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• Hash : 4d61f7ed
  Author :
  Date : 2015-08-12T10:56:50
  

  Reland Fixed compiler warning C4267 'conversion from 'size_t' to 'type', possible loss of data'
  Additional warnings found with more testing and added C4267 warning disable only for angle_libpng
  
  BUG=angleproject:1120
  
  Change-Id: Ic403dcff5a8018056fa51a8c408e64207f3362eb
  Reviewed-on: https://chromium-review.googlesource.com/293028
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/d3d/BufferD3D.cpp

• //
  // Copyright 2014 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.
  //
  
  // BufferD3D.cpp Defines common functionality between the Buffer9 and Buffer11 classes.
  
  #include "libANGLE/renderer/d3d/BufferD3D.h"
  
  #include "common/utilities.h"
  #include "libANGLE/renderer/d3d/IndexBuffer.h"
  #include "libANGLE/renderer/d3d/VertexBuffer.h"
  
  namespace rx
  {
  
  unsigned int BufferD3D::mNextSerial = 1;
  
  BufferD3D::BufferD3D(BufferFactoryD3D *factory)
      : BufferImpl(),
        mFactory(factory),
        mStaticVertexBuffer(nullptr),
        mStaticIndexBuffer(nullptr),
        mUnmodifiedDataUse(0),
        mUsage(D3D_BUFFER_USAGE_STATIC)
  {
      updateSerial();
  }
  
  BufferD3D::~BufferD3D()
  {
      SafeDelete(mStaticVertexBuffer);
      SafeDelete(mStaticIndexBuffer);
  }
  
  void BufferD3D::updateSerial()
  {
      mSerial = mNextSerial++;
  }
  
  void BufferD3D::updateD3DBufferUsage(GLenum usage)
  {
      switch (usage)
      {
          case GL_STATIC_DRAW:
          case GL_STATIC_READ:
          case GL_STATIC_COPY:
              mUsage = D3D_BUFFER_USAGE_STATIC;
              initializeStaticData();
              break;
  
          case GL_STREAM_DRAW:
          case GL_STREAM_READ:
          case GL_STREAM_COPY:
          case GL_DYNAMIC_READ:
          case GL_DYNAMIC_COPY:
          case GL_DYNAMIC_DRAW:
              mUsage = D3D_BUFFER_USAGE_DYNAMIC;
              break;
          default:
              UNREACHABLE();
      }
  }
  
  void BufferD3D::initializeStaticData()
  {
      if (!mStaticVertexBuffer)
      {
          mStaticVertexBuffer = new StaticVertexBufferInterface(mFactory);
      }
      if (!mStaticIndexBuffer)
      {
          mStaticIndexBuffer = new StaticIndexBufferInterface(mFactory);
      }
  }
  
  void BufferD3D::invalidateStaticData()
  {
      if ((mStaticVertexBuffer && mStaticVertexBuffer->getBufferSize() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->getBufferSize() != 0))
      {
          SafeDelete(mStaticVertexBuffer);
          SafeDelete(mStaticIndexBuffer);
  
          // If the buffer was created with a static usage then we recreate the static
          // buffers so that they are populated the next time we use this buffer.
          if (mUsage == D3D_BUFFER_USAGE_STATIC)
          {
              initializeStaticData();
          }
      }
  
      mUnmodifiedDataUse = 0;
  }
  
  // Creates static buffers if sufficient used data has been left unmodified
  void BufferD3D::promoteStaticUsage(int dataSize)
  {
      if (!mStaticVertexBuffer && !mStaticIndexBuffer)
      {
          mUnmodifiedDataUse += dataSize;
  
          if (mUnmodifiedDataUse > 3 * getSize())
          {
              initializeStaticData();
          }
      }
  }
  
  gl::Error BufferD3D::getIndexRange(GLenum type, size_t offset, size_t count, gl::RangeUI *outRange)
  {
      const uint8_t *data = nullptr;
      gl::Error error = getData(&data);
      if (error.isError())
      {
          return error;
      }
  
      *outRange = gl::ComputeIndexRange(type, data + offset, static_cast<GLsizei>(count));
      return gl::Error(GL_NO_ERROR);
  }
  
  }
  

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