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

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• Hash : 8dc27f99
  Author :
  Date : 2018-11-29T11:45:44
  

  Use packed enum for DrawElementsType.
  
  The packing and unpacking take a few extra instructions. But it
  completely obviates the need for any switches in the validation code.
  Speed is slightly faster or the similar depending on the back-end.
  
  Also add gl_angle_ext.xml to GL entry point generator inputs. This was
  missing and would cause the code generation to miss certain changes.
  
  Bug: angleproject:2985
  Change-Id: I1ea41a71db71135000166ead8305ec42d22ff7b3
  Reviewed-on: https://chromium-review.googlesource.com/c/1351729
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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

• //
  // Copyright (c) 2002-2014 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.
  //
  
  // IndexDataManager.h: Defines the IndexDataManager, a class that
  // runs the Buffer translation process for index buffers.
  
  #ifndef LIBANGLE_INDEXDATAMANAGER_H_
  #define LIBANGLE_INDEXDATAMANAGER_H_
  
  #include <GLES2/gl2.h>
  
  #include "common/angleutils.h"
  #include "common/mathutil.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/renderer/d3d/RendererD3D.h"
  
  namespace
  {
  enum
  {
      INITIAL_INDEX_BUFFER_SIZE = 4096 * sizeof(GLuint)
  };
  }
  
  namespace gl
  {
  class Buffer;
  }
  
  namespace rx
  {
  class IndexBufferInterface;
  class StaticIndexBufferInterface;
  class StreamingIndexBufferInterface;
  class IndexBuffer;
  class BufferD3D;
  class RendererD3D;
  
  struct SourceIndexData
  {
      BufferD3D *srcBuffer;
      const void *srcIndices;
      unsigned int srcCount;
      gl::DrawElementsType srcIndexType;
      bool srcIndicesChanged;
  };
  
  struct TranslatedIndexData
  {
      unsigned int startIndex;
      unsigned int startOffset;  // In bytes
  
      IndexBuffer *indexBuffer;
      BufferD3D *storage;
      gl::DrawElementsType indexType;
      unsigned int serial;
  
      SourceIndexData srcIndexData;
  };
  
  class IndexDataManager : angle::NonCopyable
  {
    public:
      explicit IndexDataManager(BufferFactoryD3D *factory);
      virtual ~IndexDataManager();
  
      void deinitialize();
  
      angle::Result prepareIndexData(const gl::Context *context,
                                     gl::DrawElementsType srcType,
                                     gl::DrawElementsType dstType,
                                     GLsizei count,
                                     gl::Buffer *glBuffer,
                                     const void *indices,
                                     TranslatedIndexData *translated);
  
    private:
      angle::Result streamIndexData(const gl::Context *context,
                                    const void *data,
                                    unsigned int count,
                                    gl::DrawElementsType srcType,
                                    gl::DrawElementsType dstType,
                                    bool usePrimitiveRestartFixedIndex,
                                    TranslatedIndexData *translated);
      angle::Result getStreamingIndexBuffer(const gl::Context *context,
                                            gl::DrawElementsType destinationIndexType,
                                            IndexBufferInterface **outBuffer);
  
      using StreamingBuffer = std::unique_ptr<StreamingIndexBufferInterface>;
  
      BufferFactoryD3D *const mFactory;
      std::unique_ptr<StreamingIndexBufferInterface> mStreamingBufferShort;
      std::unique_ptr<StreamingIndexBufferInterface> mStreamingBufferInt;
  };
  
  angle::Result GetIndexTranslationDestType(const gl::Context *context,
                                            GLsizei indexCount,
                                            gl::DrawElementsType indexType,
                                            const void *indices,
                                            bool usePrimitiveRestartWorkaround,
                                            gl::DrawElementsType *destTypeOut);
  
  ANGLE_INLINE bool IsOffsetAligned(gl::DrawElementsType elementType, unsigned int offset)
  {
      return (offset % gl::GetDrawElementsTypeSize(elementType) == 0);
  }
  }  // namespace rx
  
  #endif  // LIBANGLE_INDEXDATAMANAGER_H_
  

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