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

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• Hash : acf2f3ad
  Author :
  Date : 2017-11-21T19:22:44
  

  Apply Chromium style fixes.
  
  This addresses several minor code quality issues that are validated
  in Chromium, but not yet applied to ANGLE:
  
  * constructors and destructors must be defined out-of-line
  * auto is not allowed for simple pointer types
  * use override everywhere instead of virtual
  * virtual functions must also be defined out-of-line
  
  Slightly reduces binary size for me (~2k on Win, 150k on Linux).
  
  Bug: angleproject:1569
  Change-Id: I073ca3365188caf5f29fb28d9eb207903c1843e6
  Reviewed-on: https://chromium-review.googlesource.com/779959
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/d3d/VertexDataManager.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.
  //
  
  // VertexDataManager.h: Defines the VertexDataManager, a class that
  // runs the Buffer translation process.
  
  #ifndef LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  #define LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  
  #include "common/angleutils.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/Constants.h"
  #include "libANGLE/VertexAttribute.h"
  
  namespace gl
  {
  class State;
  struct VertexAttribute;
  class VertexBinding;
  struct VertexAttribCurrentValueData;
  }
  
  namespace rx
  {
  class BufferD3D;
  class BufferFactoryD3D;
  class StreamingVertexBufferInterface;
  class VertexBuffer;
  
  class VertexBufferBinding final
  {
    public:
      VertexBufferBinding();
      VertexBufferBinding(const VertexBufferBinding &other);
      ~VertexBufferBinding();
  
      void set(VertexBuffer *vertexBuffer);
      VertexBuffer *get() const;
      VertexBufferBinding &operator=(const VertexBufferBinding &other);
  
    private:
      VertexBuffer *mBoundVertexBuffer;
  };
  
  struct TranslatedAttribute
  {
      TranslatedAttribute();
      TranslatedAttribute(const TranslatedAttribute &other);
  
      // Computes the correct offset from baseOffset, usesFirstVertexOffset, stride and startVertex.
      // Can throw an error on integer overflow.
      gl::ErrorOrResult<unsigned int> computeOffset(GLint startVertex) const;
  
      bool active;
  
      const gl::VertexAttribute *attribute;
      const gl::VertexBinding *binding;
      GLenum currentValueType;
      unsigned int baseOffset;
      bool usesFirstVertexOffset;
      unsigned int stride;   // 0 means not to advance the read pointer at all
  
      VertexBufferBinding vertexBuffer;
      BufferD3D *storage;
      unsigned int serial;
      unsigned int divisor;
  };
  
  enum class VertexStorageType
  {
      UNKNOWN,
      STATIC,         // Translate the vertex data once and re-use it.
      DYNAMIC,        // Translate the data every frame into a ring buffer.
      DIRECT,         // Bind a D3D buffer directly without any translation.
      CURRENT_VALUE,  // Use a single value for the attribute.
  };
  
  // Given a vertex attribute, return the type of storage it will use.
  VertexStorageType ClassifyAttributeStorage(const gl::VertexAttribute &attrib,
                                             const gl::VertexBinding &binding);
  
  class VertexDataManager : angle::NonCopyable
  {
    public:
      VertexDataManager(BufferFactoryD3D *factory);
      virtual ~VertexDataManager();
  
      gl::Error initialize();
      void deinitialize();
  
      gl::Error prepareVertexData(const gl::Context *context,
                                  GLint start,
                                  GLsizei count,
                                  std::vector<TranslatedAttribute> *translatedAttribs,
                                  GLsizei instances);
  
      static void StoreDirectAttrib(TranslatedAttribute *directAttrib);
  
      static gl::Error StoreStaticAttrib(const gl::Context *context, TranslatedAttribute *translated);
  
      gl::Error storeDynamicAttribs(const gl::Context *context,
                                    std::vector<TranslatedAttribute> *translatedAttribs,
                                    const gl::AttributesMask &dynamicAttribsMask,
                                    GLint start,
                                    GLsizei count,
                                    GLsizei instances);
  
      // Promote static usage of dynamic buffers.
      static void PromoteDynamicAttribs(const gl::Context *context,
                                        const std::vector<TranslatedAttribute> &translatedAttribs,
                                        const gl::AttributesMask &dynamicAttribsMask,
                                        GLsizei count);
  
      gl::Error storeCurrentValue(const gl::VertexAttribCurrentValueData &currentValue,
                                  TranslatedAttribute *translated,
                                  size_t attribIndex);
  
    private:
      struct CurrentValueState
      {
          CurrentValueState();
          ~CurrentValueState();
  
          std::unique_ptr<StreamingVertexBufferInterface> buffer;
          gl::VertexAttribCurrentValueData data;
          size_t offset;
      };
  
      gl::Error reserveSpaceForAttrib(const TranslatedAttribute &translatedAttrib,
                                      GLsizei count,
                                      GLint start,
                                      GLsizei instances) const;
  
      gl::Error storeDynamicAttrib(const gl::Context *context,
                                   TranslatedAttribute *translated,
                                   GLint start,
                                   GLsizei count,
                                   GLsizei instances);
  
      BufferFactoryD3D *const mFactory;
  
      std::unique_ptr<StreamingVertexBufferInterface> mStreamingBuffer;
      std::vector<CurrentValueState> mCurrentValueCache;
      gl::AttributesMask mDynamicAttribsMaskCache;
  };
  
  }  // namespace rx
  
  #endif   // LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
  

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