kc3-lang/angle/src/libANGLE/renderer/gl/VertexArrayGL.h

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• Hash : b61e173a
  Author :
  Date : 2015-06-05T11:49:55
  

  Only sync attributes used by the current program in RendererGL.
  
  Improves draw call overhead of RendererGL.
  
  DrawCallPerf_gl:
  Before: 136973 score
  After: 153317 score
  Improvement: 11.932%
  
  BUG=angleproject:959
  
  Change-Id: Ib75f6fdd756648e4a07f6e970cda03abbdbcf009
  Reviewed-on: https://chromium-review.googlesource.com/275409
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/gl/VertexArrayGL.h

• //
  // Copyright 2015 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.
  //
  
  // VertexArrayGL.h: Defines the class interface for VertexArrayGL.
  
  #ifndef LIBANGLE_RENDERER_GL_VERTEXARRAYGL_H_
  #define LIBANGLE_RENDERER_GL_VERTEXARRAYGL_H_
  
  #include "libANGLE/renderer/VertexArrayImpl.h"
  
  namespace rx
  {
  
  class FunctionsGL;
  class StateManagerGL;
  
  class VertexArrayGL : public VertexArrayImpl
  {
    public:
      VertexArrayGL(const gl::VertexArray::Data &data, const FunctionsGL *functions, StateManagerGL *stateManager);
      ~VertexArrayGL() override;
  
      void setElementArrayBuffer(const gl::Buffer *buffer) override;
      void setAttribute(size_t idx, const gl::VertexAttribute &attr) override;
      void setAttributeDivisor(size_t idx, GLuint divisor) override;
      void enableAttribute(size_t idx, bool enabledState) override;
  
      gl::Error syncDrawArraysState(const std::vector<GLuint> &activeAttribLoations, GLint first, GLsizei count) const;
      gl::Error syncDrawElementsState(const std::vector<GLuint> &activeAttribLoations, GLsizei count, GLenum type,
                                      const GLvoid *indices, const GLvoid **outIndices) const;
  
      GLuint getVertexArrayID() const;
      GLuint getAppliedElementArrayBufferID() const;
  
    private:
      gl::Error syncDrawState(const std::vector<GLuint> &activeAttribLoations, GLint first, GLsizei count,
                              GLenum type, const GLvoid *indices, const GLvoid **outIndices) const;
  
      // Check if any vertex attributes need to be streamed
      bool doAttributesNeedStreaming(const std::vector<GLuint> &activeAttribLoations) const;
  
      // Apply attribute state, returns the amount of space needed to stream all attributes that need streaming
      // and the data size of the largest attribute
      gl::Error syncAttributeState(const std::vector<GLuint> &activeAttribLoations, bool attributesNeedStreaming,
                                   const gl::RangeUI &indexRange, size_t *outStreamingDataSize,
                                   size_t *outMaxAttributeDataSize) const;
  
      // Apply index data, only sets outIndexRange if attributesNeedStreaming is true
      gl::Error syncIndexData(GLsizei count, GLenum type, const GLvoid *indices, bool attributesNeedStreaming,
                              gl::RangeUI *outIndexRange, const GLvoid **outIndices) const;
  
      // Stream attributes that have client data
      gl::Error streamAttributes(const std::vector<GLuint> &activeAttribLoations, size_t streamingDataSize,
                                 size_t maxAttributeDataSize, const gl::RangeUI &indexRange) const;
  
      const FunctionsGL *mFunctions;
      StateManagerGL *mStateManager;
  
      GLuint mVertexArrayID;
  
      mutable GLuint mAppliedElementArrayBuffer;
      mutable std::vector<gl::VertexAttribute> mAppliedAttributes;
  
      mutable size_t mStreamingElementArrayBufferSize;
      mutable GLuint mStreamingElementArrayBuffer;
  
      mutable size_t mStreamingArrayBufferSize;
      mutable GLuint mStreamingArrayBuffer;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_GL_VERTEXARRAYGL_H_
  

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