kc3-lang/angle/src/libANGLE/VertexArray.h

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• Author : Jamie Madill
  Date : 2015-04-28 12:39:07
  Hash : aebf9dde
  Message : Cache maximum enabled vertex attribute. This can give us much faster draw call validation, by saving us from checking buffer sizes for non-enabled attribs. Also for checking if vertex buffers are mapped. Gives >100% increase in the benchmark. BUG=angleproject:959 Change-Id: I211c310385bdee46ed06f68ecd9c98385e1f8db9 Reviewed-on: https://chromium-review.googlesource.com/267751 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org>

• src/libANGLE/VertexArray.h

• //
  // Copyright (c) 2013 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.
  //
  // This class contains prototypes for representing GLES 3 Vertex Array Objects:
  //
  //   The buffer objects that are to be used by the vertex stage of the GL are collected
  //   together to form a vertex array object. All state related to the definition of data used
  //   by the vertex processor is encapsulated in a vertex array object.
  //
  
  #ifndef LIBANGLE_VERTEXARRAY_H_
  #define LIBANGLE_VERTEXARRAY_H_
  
  #include "libANGLE/RefCountObject.h"
  #include "libANGLE/Constants.h"
  #include "libANGLE/VertexAttribute.h"
  
  #include <vector>
  
  namespace rx
  {
  class VertexArrayImpl;
  }
  
  namespace gl
  {
  class Buffer;
  
  class VertexArray
  {
    public:
      VertexArray(rx::VertexArrayImpl *impl, GLuint id, size_t maxAttribs);
      ~VertexArray();
  
      GLuint id() const;
  
      const VertexAttribute& getVertexAttribute(size_t attributeIndex) const;
      const std::vector<VertexAttribute> &getVertexAttributes() const;
  
      void detachBuffer(GLuint bufferName);
      void setVertexAttribDivisor(GLuint index, GLuint divisor);
      void enableAttribute(unsigned int attributeIndex, bool enabledState);
      void setAttributeState(unsigned int attributeIndex, gl::Buffer *boundBuffer, GLint size, GLenum type,
                             bool normalized, bool pureInteger, GLsizei stride, const void *pointer);
  
      Buffer *getElementArrayBuffer() const { return mElementArrayBuffer.get(); }
      void setElementArrayBuffer(Buffer *buffer);
      GLuint getElementArrayBufferId() const { return mElementArrayBuffer.id(); }
      size_t getMaxAttribs() const { return mVertexAttributes.size(); }
  
      rx::VertexArrayImpl *getImplementation() { return mVertexArray; }
      const rx::VertexArrayImpl *getImplementation() const { return mVertexArray; }
  
      unsigned int getMaxEnabledAttribute() const { return mMaxEnabledAttribute; }
  
    private:
      GLuint mId;
  
      rx::VertexArrayImpl *mVertexArray;
      std::vector<VertexAttribute> mVertexAttributes;
      BindingPointer<Buffer> mElementArrayBuffer;
      unsigned int mMaxEnabledAttribute;
  };
  
  }
  
  #endif // LIBANGLE_VERTEXARRAY_H_