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

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• Hash : e36b92d4
  Author :
  Date : 2016-03-04T15:46:58
  

  D3D: Use a single D3D buffer per static vertex attribute.
  
  The current caching logic stores multiple static attributes in a single
  buffer if the attributes share a D3D buffer - sometimes.
  If a buffer is 'committed' (has been used in a draw) then we would
  make a new D3D buffer for the next set of static attributes.
  
  Instead use a simpler scheme of a single D3D buffer for each
  static attribute. Also change rx::VertexBuffer to a reference
  counted class. This simplifies the caching logic for static vertex
  buffers (translated attributes) considerably. We only need to
  release the buffers when the ref count is zero, and ensure we
  track the ref count correctly when bound to D3D.
  
  This leads the way towards using a simpler dirty bit scheme for
  intelligent state updates, and less overhead doing work with
  buffer state updates.
  
  BUG=angleproject:1327
  
  Change-Id: I99461d50b9663024eaa654cd56b42a63f1416d08
  Reviewed-on: https://chromium-review.googlesource.com/330170
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d9/VertexBuffer9.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.h: Defines the D3D9 VertexBuffer implementation.
  
  #ifndef LIBANGLE_RENDERER_D3D_D3D9_VERTEXBUFFER9_H_
  #define LIBANGLE_RENDERER_D3D_D3D9_VERTEXBUFFER9_H_
  
  #include "libANGLE/renderer/d3d/VertexBuffer.h"
  
  namespace rx
  {
  class Renderer9;
  
  class VertexBuffer9 : public VertexBuffer
  {
    public:
      explicit VertexBuffer9(Renderer9 *renderer);
  
      gl::Error initialize(unsigned int size, bool dynamicUsage) override;
  
      gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
                                      GLenum currentValueType,
                                      GLint start,
                                      GLsizei count,
                                      GLsizei instances,
                                      unsigned int offset,
                                      const uint8_t *sourceData) override;
  
      unsigned int getBufferSize() const override;
      gl::Error setBufferSize(unsigned int size) override;
      gl::Error discard() override;
  
      IDirect3DVertexBuffer9 *getBuffer() const;
  
    private:
      ~VertexBuffer9() override;
      Renderer9 *mRenderer;
  
      IDirect3DVertexBuffer9 *mVertexBuffer;
      unsigned int mBufferSize;
      bool mDynamicUsage;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_D3D_D3D9_VERTEXBUFFER9_H_
  

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