kc3-lang/angle/src/libANGLE/renderer/d3d/BufferD3D.h

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• Author : Geoff Lang
  Date : 2015-05-05 13:12:36
  Hash : 520c4ae2
  Message : 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>

• src/libANGLE/renderer/d3d/BufferD3D.h

• //
  // Copyright 2014 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.
  //
  
  // BufferD3D.h: Defines the rx::BufferD3D class, an implementation of BufferImpl.
  
  #ifndef LIBANGLE_RENDERER_D3D_BUFFERD3D_H_
  #define LIBANGLE_RENDERER_D3D_BUFFERD3D_H_
  
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/BufferImpl.h"
  
  #include <stdint.h>
  
  namespace rx
  {
  class BufferFactoryD3D;
  class StaticIndexBufferInterface;
  class StaticVertexBufferInterface;
  
  class BufferD3D : public BufferImpl
  {
    public:
      BufferD3D(BufferFactoryD3D *factory);
      virtual ~BufferD3D();
  
      unsigned int getSerial() const { return mSerial; }
  
      virtual size_t getSize() const = 0;
      virtual bool supportsDirectBinding() const = 0;
      virtual void markTransformFeedbackUsage() = 0;
      virtual gl::Error getData(const uint8_t **outData) = 0;
  
      StaticVertexBufferInterface *getStaticVertexBuffer() { return mStaticVertexBuffer; }
      StaticIndexBufferInterface *getStaticIndexBuffer() { return mStaticIndexBuffer; }
  
      void initializeStaticData();
      void invalidateStaticData();
      void promoteStaticUsage(int dataSize);
  
      gl::Error getIndexRange(GLenum type, size_t offset, size_t count, gl::RangeUI *outRange) override;
  
    protected:
      void updateSerial();
  
      BufferFactoryD3D *mFactory;
      unsigned int mSerial;
      static unsigned int mNextSerial;
  
      StaticVertexBufferInterface *mStaticVertexBuffer;
      StaticIndexBufferInterface *mStaticIndexBuffer;
      unsigned int mUnmodifiedDataUse;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_D3D_BUFFERD3D_H_