kc3-lang/angle/src/libANGLE/ImageIndex.h

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• Hash : 99d492c2
  Author :
  Date : 2018-02-27T15:17:10
  

  Use packed enums for the texture types and targets, part 2
  
  This completes the refactor by using the packed enums in the gl:: layer
  and in the backends.
  
  The packed enum code generation is modified to support explicitly
  assigning values to the packed enums so that the TextureTarget cube map
  faces are in the correct order and easy to iterate over.
  
  BUG=angleproject:2169
  
  Change-Id: I5903235e684ccf382e92a8a1e10c5c85b4b16a04
  Reviewed-on: https://chromium-review.googlesource.com/939994
  Commit-Queue: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/ImageIndex.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.
  //
  
  // ImageIndex.h: A helper struct for indexing into an Image array
  
  #ifndef LIBANGLE_IMAGE_INDEX_H_
  #define LIBANGLE_IMAGE_INDEX_H_
  
  #include "common/mathutil.h"
  #include "libANGLE/PackedGLEnums.h"
  
  #include "angle_gl.h"
  
  namespace gl
  {
  
  class ImageIndexIterator;
  
  struct ImageIndex
  {
      TextureType type;
      TextureTarget target;
  
      GLint mipIndex;
  
      GLint layerIndex;
      GLint numLayers;
  
      ImageIndex(const ImageIndex &other);
      ImageIndex &operator=(const ImageIndex &other);
  
      bool hasLayer() const { return layerIndex != ENTIRE_LEVEL; }
      bool is3D() const;
      GLint cubeMapFaceIndex() const;
      bool valid() const;
  
      static ImageIndex Make2D(GLint mipIndex);
      static ImageIndex MakeRectangle(GLint mipIndex);
      static ImageIndex MakeCube(TextureTarget target, GLint mipIndex);
      static ImageIndex Make2DArray(GLint mipIndex, GLint layerIndex);
      static ImageIndex Make2DArrayRange(GLint mipIndex, GLint layerIndex, GLint numLayers);
      static ImageIndex Make3D(GLint mipIndex, GLint layerIndex = ENTIRE_LEVEL);
      static ImageIndex MakeGeneric(TextureTarget target, GLint mipIndex);
      static ImageIndex Make2DMultisample();
  
      static ImageIndex MakeInvalid();
  
      static const GLint ENTIRE_LEVEL = static_cast<GLint>(-1);
  
    private:
      friend class ImageIndexIterator;
  
      ImageIndex(TextureType typeIn,
                 TextureTarget targetIn,
                 GLint mipIndexIn,
                 GLint layerIndexIn,
                 GLint numLayersIn);
  };
  
  bool operator<(const ImageIndex &a, const ImageIndex &b);
  bool operator==(const ImageIndex &a, const ImageIndex &b);
  bool operator!=(const ImageIndex &a, const ImageIndex &b);
  
  class ImageIndexIterator
  {
    public:
      ImageIndexIterator(const ImageIndexIterator &other);
  
      static ImageIndexIterator Make2D(GLint minMip, GLint maxMip);
      static ImageIndexIterator MakeRectangle(GLint minMip, GLint maxMip);
      static ImageIndexIterator MakeCube(GLint minMip, GLint maxMip);
      static ImageIndexIterator Make3D(GLint minMip, GLint maxMip, GLint minLayer, GLint maxLayer);
      static ImageIndexIterator Make2DArray(GLint minMip, GLint maxMip, const GLsizei *layerCounts);
      static ImageIndexIterator Make2DMultisample();
  
      ImageIndex next();
      ImageIndex current() const;
      bool hasNext() const;
  
    private:
      ImageIndexIterator(TextureType type,
                         angle::EnumIterator<TextureTarget> targetLow,
                         angle::EnumIterator<TextureTarget> targetHigh,
                         const Range<GLint> &mipRange,
                         const Range<GLint> &layerRange,
                         const GLsizei *layerCounts);
  
      GLint maxLayer() const;
  
      const angle::EnumIterator<TextureTarget> mTargetLow;
      const angle::EnumIterator<TextureTarget> mTargetHigh;
      const Range<GLint> mMipRange;
      const Range<GLint> mLayerRange;
      const GLsizei *const mLayerCounts;
  
      ImageIndex mCurrentIndex;
  };
  
  }
  
  #endif // LIBANGLE_IMAGE_INDEX_H_
  

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