kc3-lang/angle/src/libANGLE/renderer/d3d/VertexDataManager.h

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• Hash : be0facc6
  Author :
  Date : 2015-01-07T16:22:29
  

  Reduce calls to ID3D11DeviceContext::Map() in VertexBuffer11.cpp
  
  This change moves VertexBuffer11::storeVertexAttributes()'s call to
  Map() outside a for-loop, eliminating unnecessary calls to Map(). Since
  Map() is a relatively expensive operation (even when using NO_OVERWRITE)
  this change gives a noticeable performance boost in some scenarios.
  
  Change-Id: I320111b32f2bb9eed92efbd240206e12aaa9964e
  Reviewed-on: https://chromium-review.googlesource.com/240181
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Austin Kinross <aukinros@microsoft.com>
  

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• src/libANGLE/renderer/d3d/VertexDataManager.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.
  //
  
  // VertexDataManager.h: Defines the VertexDataManager, a class that
  // runs the Buffer translation process.
  
  #ifndef LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  #define LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  
  #include "libANGLE/Constants.h"
  #include "libANGLE/VertexAttribute.h"
  #include "common/angleutils.h"
  
  namespace gl
  {
  class State;
  struct VertexAttribute;
  struct VertexAttribCurrentValueData;
  }
  
  namespace rx
  {
  class BufferD3D;
  class StreamingVertexBufferInterface;
  class VertexBuffer;
  class RendererD3D;
  
  struct TranslatedAttribute
  {
      TranslatedAttribute() : active(false), attribute(NULL), currentValueType(GL_NONE),
                              offset(0), stride(0), vertexBuffer(NULL), storage(NULL),
                              serial(0), divisor(0) {};
      bool active;
  
      const gl::VertexAttribute *attribute;
      GLenum currentValueType;
      unsigned int offset;
      unsigned int stride;   // 0 means not to advance the read pointer at all
  
      VertexBuffer *vertexBuffer;
      BufferD3D *storage;
      unsigned int serial;
      unsigned int divisor;
  };
  
  class VertexDataManager
  {
    public:
      VertexDataManager(RendererD3D *renderer);
      virtual ~VertexDataManager();
  
      gl::Error prepareVertexData(const gl::State &state, GLint start, GLsizei count,
                                  TranslatedAttribute *outAttribs, GLsizei instances);
  
    private:
      DISALLOW_COPY_AND_ASSIGN(VertexDataManager);
  
      gl::Error reserveSpaceForAttrib(const gl::VertexAttribute &attrib,
                                      const gl::VertexAttribCurrentValueData &currentValue,
                                      GLsizei count,
                                      GLsizei instances) const;
  
      void invalidateMatchingStaticData(const gl::VertexAttribute &attrib,
                                        const gl::VertexAttribCurrentValueData &currentValue) const;
  
      gl::Error storeAttribute(const gl::VertexAttribute &attrib,
                               const gl::VertexAttribCurrentValueData &currentValue,
                               TranslatedAttribute *translated,
                               GLint start,
                               GLsizei count,
                               GLsizei instances);
  
      gl::Error storeCurrentValue(const gl::VertexAttribute &attrib,
                                  const gl::VertexAttribCurrentValueData &currentValue,
                                  TranslatedAttribute *translated,
                                  gl::VertexAttribCurrentValueData *cachedValue,
                                  size_t *cachedOffset,
                                  StreamingVertexBufferInterface *buffer);
  
      void hintUnmapAllResources(const gl::State &state);
  
      RendererD3D *const mRenderer;
  
      StreamingVertexBufferInterface *mStreamingBuffer;
  
      gl::VertexAttribCurrentValueData mCurrentValue[gl::MAX_VERTEX_ATTRIBS];
  
      StreamingVertexBufferInterface *mCurrentValueBuffer[gl::MAX_VERTEX_ATTRIBS];
      std::size_t mCurrentValueOffsets[gl::MAX_VERTEX_ATTRIBS];
  };
  
  }
  
  #endif   // LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  

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