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

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• Hash : 2597fb64
  Author :
  Date : 2016-12-09T16:38:02
  

  ES31: Refactor VertexArray for Vertex Attrib Binding
  
  OpenGL ES3.1 feature Vertex Attrib Binding requires vertex arrays should
  be split into two arrays:
  1. an array of vertex buffer binding points, each of which specifies:
    - a bound buffer object,
    - a starting offset for vertex attribute data in that buffer object,
    - a stride used by all attributes using that binding point,
    - a frequency divisor used by all attributes using that binding point.
  2. an array of generic vertex attribute format information records, each
  of which specifies:
    - a reference to one of the new buffer binding points above,
    - a component count and format, and a normalization flag for the
      attribute data,
    - the offset of the attribute data relative to the base offset of each
      vertex found at the associated binding point.
  
  Current ANGLE implementation simply uses a struct to represent a vertex
  attribute object, which does not meet the requirements above.
  
  This patch aims to be the the basis of the implementation of all ES3.1
  Vertex Attrib Binding APIs by refactoring the struct VertexAttribute and
  the class VertexArray to fit the new data layout and ensuring all current
  functionality is retained.
  
  BUG=angleproject:1593
  
  TEST=angle_unittests, angle_end2end_tests, gpu_unittests
  
  Change-Id: Ieb41f1bf503f815fd0476d2ea045dcb863465254
  Reviewed-on: https://chromium-review.googlesource.com/418880
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• 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>
  #include <vector>
  
  namespace gl
  {
  struct VertexAttribute;
  struct VertexBinding;
  }
  
  namespace rx
  {
  class BufferFactoryD3D;
  class StaticIndexBufferInterface;
  class StaticVertexBufferInterface;
  
  enum class D3DBufferUsage
  {
      STATIC,
      DYNAMIC,
  };
  
  class BufferD3D : public BufferImpl
  {
    public:
      BufferD3D(const gl::BufferState &state, BufferFactoryD3D *factory);
      virtual ~BufferD3D();
  
      unsigned int getSerial() const { return mSerial; }
  
      virtual size_t getSize() const = 0;
      virtual bool supportsDirectBinding() const = 0;
      virtual gl::Error markTransformFeedbackUsage() = 0;
      virtual gl::Error getData(const uint8_t **outData) = 0;
  
      // Warning: you should ensure binding really matches attrib.bindingIndex before using this
      // function.
      StaticVertexBufferInterface *getStaticVertexBuffer(const gl::VertexAttribute &attribute,
                                                         const gl::VertexBinding &binding);
      StaticIndexBufferInterface *getStaticIndexBuffer();
  
      virtual void initializeStaticData();
      virtual void invalidateStaticData();
  
      void promoteStaticUsage(int dataSize);
  
      gl::Error getIndexRange(GLenum type,
                              size_t offset,
                              size_t count,
                              bool primitiveRestartEnabled,
                              gl::IndexRange *outRange) override;
  
      BufferFactoryD3D *getFactory() const { return mFactory; }
      D3DBufferUsage getUsage() const { return mUsage; }
  
    protected:
      void updateSerial();
      void updateD3DBufferUsage(GLenum usage);
      void emptyStaticBufferCache();
  
      BufferFactoryD3D *mFactory;
      unsigned int mSerial;
      static unsigned int mNextSerial;
  
      std::vector<std::unique_ptr<StaticVertexBufferInterface>> mStaticVertexBuffers;
      StaticIndexBufferInterface *mStaticIndexBuffer;
      unsigned int mStaticBufferCacheTotalSize;
      unsigned int mStaticVertexBufferOutOfDate;
      unsigned int mUnmodifiedDataUse;
      D3DBufferUsage mUsage;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_D3D_BUFFERD3D_H_
  

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