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

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• Hash : 3d72cc79
  Author :
  Date : 2015-06-22T13:57:19
  

  Pass current value type instead of the object.
  
  This allows us to simplify the logic in VertexDataManager enough
  that we can start to cache attribute information.
  
  BUG=angleproject:959
  
  Change-Id: I7b53a137d73f40f86e3acb9caebb66f9cacf8b6f
  Reviewed-on: https://chromium-review.googlesource.com/277283
  Tested-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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

• //
  // Copyright (c) 2002-2012 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.
  //
  
  // VertexBuffer.h: Defines the abstract VertexBuffer class and VertexBufferInterface
  // class with derivations, classes that perform graphics API agnostic vertex buffer operations.
  
  #ifndef LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
  #define LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
  
  #include "common/angleutils.h"
  #include "libANGLE/Error.h"
  
  #include <GLES2/gl2.h>
  
  #include <cstddef>
  #include <cstdint>
  #include <vector>
  
  namespace gl
  {
  struct VertexAttribute;
  struct VertexAttribCurrentValueData;
  }
  
  namespace rx
  {
  class BufferFactoryD3D;
  
  class VertexBuffer : angle::NonCopyable
  {
    public:
      VertexBuffer();
      virtual ~VertexBuffer();
  
      virtual gl::Error initialize(unsigned int size, bool dynamicUsage) = 0;
  
      virtual gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
                                              GLenum currentValueType,
                                              GLint start,
                                              GLsizei count,
                                              GLsizei instances,
                                              unsigned int offset,
                                              const uint8_t *sourceData) = 0;
      virtual gl::Error getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances,
                                         unsigned int *outSpaceRequired) const = 0;
  
      virtual unsigned int getBufferSize() const = 0;
      virtual gl::Error setBufferSize(unsigned int size) = 0;
      virtual gl::Error discard() = 0;
  
      unsigned int getSerial() const;
  
      // This may be overridden (e.g. by VertexBuffer11) if necessary.
      virtual void hintUnmapResource() { };
  
    protected:
      void updateSerial();
  
    private:
      unsigned int mSerial;
      static unsigned int mNextSerial;
  };
  
  class VertexBufferInterface : angle::NonCopyable
  {
    public:
      VertexBufferInterface(BufferFactoryD3D *factory, bool dynamic);
      virtual ~VertexBufferInterface();
  
      gl::Error reserveVertexSpace(const gl::VertexAttribute &attribute, GLsizei count, GLsizei instances);
  
      unsigned int getBufferSize() const;
  
      unsigned int getSerial() const;
  
      virtual gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
                                              GLenum currentValueType,
                                              GLint start,
                                              GLsizei count,
                                              GLsizei instances,
                                              unsigned int *outStreamOffset,
                                              const uint8_t *sourceData);
  
      bool directStoragePossible(const gl::VertexAttribute &attrib,
                                 GLenum currentValueType) const;
  
      VertexBuffer* getVertexBuffer() const;
  
    protected:
      virtual gl::Error reserveSpace(unsigned int size) = 0;
  
      unsigned int getWritePosition() const;
      void setWritePosition(unsigned int writePosition);
  
      gl::Error discard();
  
      gl::Error setBufferSize(unsigned int size);
  
    private:
      BufferFactoryD3D *const mFactory;
  
      VertexBuffer* mVertexBuffer;
  
      unsigned int mWritePosition;
      unsigned int mReservedSpace;
      bool mDynamic;
  };
  
  class StreamingVertexBufferInterface : public VertexBufferInterface
  {
    public:
      StreamingVertexBufferInterface(BufferFactoryD3D *factory, std::size_t initialSize);
      ~StreamingVertexBufferInterface();
  
    protected:
      gl::Error reserveSpace(unsigned int size);
  };
  
  class StaticVertexBufferInterface : public VertexBufferInterface
  {
    public:
      explicit StaticVertexBufferInterface(BufferFactoryD3D *factory);
      ~StaticVertexBufferInterface();
  
      gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
                                      GLenum currentValueType,
                                      GLint start,
                                      GLsizei count,
                                      GLsizei instances,
                                      unsigned int *outStreamOffset,
                                      const uint8_t *sourceData) override;
  
      bool lookupAttribute(const gl::VertexAttribute &attribute, unsigned int* outStreamFffset);
  
    protected:
      gl::Error reserveSpace(unsigned int size);
  
    private:
      struct VertexElement
      {
          GLenum type;
          GLuint size;
          GLuint stride;
          bool normalized;
          bool pureInteger;
          size_t attributeOffset;
  
          unsigned int streamOffset;
      };
  
      std::vector<VertexElement> mCache;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
  

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