kc3-lang/angle/src/libGLESv2/renderer/d3d/IndexDataManager.h

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• Hash : 8d62bcc4
  Author :
  Date : 2014-07-25T15:08:21
  

  Avoid D3D11 primitive restart index using 32-bit indices
  
  D3D11 interprets an index value of 0xFFFF in a 16-bit index buffer as a
  primitive restart marker. This behavior can't be toggled off.
  http://msdn.microsoft.com/en-us/library/windows/desktop/bb205124(v=vs.85).aspx
  We work around it by converting to 32-bit indices.
  
  BUG=angle:708
  
  Change-Id: Ibc92d6ba98e5f11a98d76cae14f90ca050a19964
  Reviewed-on: https://chromium-review.googlesource.com/209883
  Tested-by: Nicolas Capens <capn@chromium.org>
  Reviewed-by: Brandon Jones <bajones@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libGLESv2/renderer/d3d/IndexDataManager.h

• //
  // Copyright (c) 2002-2014 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.
  //
  
  // IndexDataManager.h: Defines the IndexDataManager, a class that
  // runs the Buffer translation process for index buffers.
  
  #ifndef LIBGLESV2_INDEXDATAMANAGER_H_
  #define LIBGLESV2_INDEXDATAMANAGER_H_
  
  #include "common/angleutils.h"
  
  namespace
  {
      enum { INITIAL_INDEX_BUFFER_SIZE = 4096 * sizeof(GLuint) };
  }
  
  namespace gl
  {
  class Buffer;
  }
  
  namespace rx
  {
  class StaticIndexBufferInterface;
  class StreamingIndexBufferInterface;
  class IndexBuffer;
  class BufferD3D;
  class Renderer;
  
  struct TranslatedIndexData
  {
      unsigned int minIndex;
      unsigned int maxIndex;
      unsigned int startIndex;
      unsigned int startOffset;   // In bytes
  
      IndexBuffer *indexBuffer;
      BufferD3D *storage;
      GLenum indexType;
      unsigned int serial;
  };
  
  class IndexDataManager
  {
    public:
      explicit IndexDataManager(Renderer *renderer);
      virtual ~IndexDataManager();
  
      GLenum prepareIndexData(GLenum type, GLsizei count, gl::Buffer *arrayElementBuffer, const GLvoid *indices, TranslatedIndexData *translated);
      StaticIndexBufferInterface *getCountingIndices(GLsizei count);
  
    private:
      DISALLOW_COPY_AND_ASSIGN(IndexDataManager);
  
      Renderer *const mRenderer;
  
      StreamingIndexBufferInterface *mStreamingBufferShort;
      StreamingIndexBufferInterface *mStreamingBufferInt;
      StaticIndexBufferInterface *mCountingBuffer;
  };
  
  }
  
  #endif   // LIBGLESV2_INDEXDATAMANAGER_H_
  

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