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

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• Hash : b878f00d
  Author :
  Date : 2018-05-14T09:45:29
  

  Fix warnings from size_t conversions.
  
  These casts could result in overflow.
  
  Bug: chromium:842028
  Change-Id: I998b638c58333a29f6bc9136ae3e81b90683cb72
  Reviewed-on: https://chromium-review.googlesource.com/1057415
  Reviewed-by: Luc Ferron <lucferron@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@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;
  class VertexBinding;
  struct VertexAttribCurrentValueData;
  }
  
  namespace rx
  {
  class BufferFactoryD3D;
  
  // Use a ref-counting scheme with self-deletion on release. We do this so that we can more
  // easily manage the static buffer cache, without deleting currently bound buffers.
  class VertexBuffer : angle::NonCopyable
  {
    public:
      VertexBuffer();
  
      virtual gl::Error initialize(unsigned int size, bool dynamicUsage) = 0;
  
      // Warning: you should ensure binding really matches attrib.bindingIndex before using this
      // function.
      virtual gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
                                              const gl::VertexBinding &binding,
                                              GLenum currentValueType,
                                              GLint start,
                                              size_t count,
                                              GLsizei instances,
                                              unsigned int offset,
                                              const uint8_t *sourceData) = 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() { };
  
      // Reference counting.
      void addRef();
      void release();
  
    protected:
      void updateSerial();
      virtual ~VertexBuffer();
  
    private:
      unsigned int mSerial;
      static unsigned int mNextSerial;
      unsigned int mRefCount;
  };
  
  class VertexBufferInterface : angle::NonCopyable
  {
    public:
      VertexBufferInterface(BufferFactoryD3D *factory, bool dynamic);
      virtual ~VertexBufferInterface();
  
      unsigned int getBufferSize() const;
      bool empty() const { return getBufferSize() == 0; }
  
      unsigned int getSerial() const;
  
      VertexBuffer *getVertexBuffer() const;
  
    protected:
      gl::Error discard();
  
      gl::Error setBufferSize(unsigned int size);
  
      gl::ErrorOrResult<unsigned int> getSpaceRequired(const gl::VertexAttribute &attrib,
                                                       const gl::VertexBinding &binding,
                                                       size_t count,
                                                       GLsizei instances) const;
      BufferFactoryD3D *const mFactory;
      VertexBuffer *mVertexBuffer;
      bool mDynamic;
  };
  
  class StreamingVertexBufferInterface : public VertexBufferInterface
  {
    public:
      StreamingVertexBufferInterface(BufferFactoryD3D *factory, std::size_t initialSize);
      ~StreamingVertexBufferInterface() override;
  
      gl::Error storeDynamicAttribute(const gl::VertexAttribute &attrib,
                                      const gl::VertexBinding &binding,
                                      GLenum currentValueType,
                                      GLint start,
                                      size_t count,
                                      GLsizei instances,
                                      unsigned int *outStreamOffset,
                                      const uint8_t *sourceData);
  
      gl::Error reserveVertexSpace(const gl::VertexAttribute &attribute,
                                   const gl::VertexBinding &binding,
                                   size_t count,
                                   GLsizei instances);
  
    private:
      gl::Error reserveSpace(unsigned int size);
  
      unsigned int mWritePosition;
      unsigned int mReservedSpace;
  };
  
  class StaticVertexBufferInterface : public VertexBufferInterface
  {
    public:
      explicit StaticVertexBufferInterface(BufferFactoryD3D *factory);
      ~StaticVertexBufferInterface() override;
  
      // Warning: you should ensure binding really matches attrib.bindingIndex before using these
      // functions.
      gl::Error storeStaticAttribute(const gl::VertexAttribute &attrib,
                                     const gl::VertexBinding &binding,
                                     GLint start,
                                     GLsizei count,
                                     GLsizei instances,
                                     const uint8_t *sourceData);
  
      bool matchesAttribute(const gl::VertexAttribute &attribute,
                            const gl::VertexBinding &binding) const;
  
      void setAttribute(const gl::VertexAttribute &attribute, const gl::VertexBinding &binding);
  
    private:
      class AttributeSignature final : angle::NonCopyable
      {
        public:
          AttributeSignature();
  
          bool matchesAttribute(const gl::VertexAttribute &attrib,
                                const gl::VertexBinding &binding) const;
  
          void set(const gl::VertexAttribute &attrib, const gl::VertexBinding &binding);
  
        private:
          GLenum type;
          GLuint size;
          GLuint stride;
          bool normalized;
          bool pureInteger;
          size_t offset;
      };
  
      AttributeSignature mSignature;
  };
  
  }  // namespace rx
  
  #endif // LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
  

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