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

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• Hash : 520c4ae2
  Author :
  Date : 2015-05-05T13:12:36
  

  Add a Buffer::getIndexRange function.
  
  Instead of exposing the index range cache, add a more generic method that
  allows the buffers to handle their own caching of index ranges.
  BufferImpl::getData can be hard to implement for BufferGL because there
  isn't a way to tell the buffer to unmap and glGetBufferSubData can be very
  expensive, requiring an extra copy of the data.
  
  BUG=angleproject:881
  
  Change-Id: Idec645219056132e0d72a410fbe7b971fa02c9e9
  Reviewed-on: https://chromium-review.googlesource.com/261892
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/gl/BufferGL.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.
  //
  
  // BufferGL.h: Defines the class interface for BufferGL.
  
  #ifndef LIBANGLE_RENDERER_GL_BUFFERGL_H_
  #define LIBANGLE_RENDERER_GL_BUFFERGL_H_
  
  #include "libANGLE/renderer/BufferImpl.h"
  
  namespace rx
  {
  
  class FunctionsGL;
  class StateManagerGL;
  
  class BufferGL : public BufferImpl
  {
    public:
      BufferGL(const FunctionsGL *functions, StateManagerGL *stateManager);
      ~BufferGL() override;
  
      gl::Error setData(const void* data, size_t size, GLenum usage) override;
      gl::Error setSubData(const void* data, size_t size, size_t offset) override;
      gl::Error copySubData(BufferImpl* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size) override;
      gl::Error map(GLenum access, GLvoid **mapPtr) override;
      gl::Error mapRange(size_t offset, size_t length, GLbitfield access, GLvoid **mapPtr) override;
      gl::Error unmap(GLboolean *result) override;
  
      gl::Error getIndexRange(GLenum type, size_t offset, size_t count, gl::RangeUI *outRange) override;
  
      GLuint getBufferID() const;
  
    private:
      bool mIsMapped;
  
      const FunctionsGL *mFunctions;
      StateManagerGL *mStateManager;
  
      GLuint mBufferID;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_GL_BUFFERGL_H_
  

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