kc3-lang/angle/src/libGLESv2/ImageIndex.h

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• Hash : ef4ac5b1
  Author :
  Date : 2014-09-29T10:46:11
  

  Add ImageIndexIterator.
  
  We can use image index iterators to iterate over all images in a
  Texture. This allows us to do some operations in TextureD3D rather
  than in the typed subclasses and save on some repeated code.
  
  BUG=angle:729
  
  Change-Id: I3ba47b2eebad2cfca313117fd501ff76d5107044
  Reviewed-on: https://chromium-review.googlesource.com/219834
  Tested-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Brandon Jones <bajones@chromium.org>
  

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• src/libGLESv2/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 LIBGLESV2_IMAGE_INDEX_H_
  #define LIBGLESV2_IMAGE_INDEX_H_
  
  #include "angle_gl.h"
  #include "common/mathutil.h"
  
  namespace gl
  {
  
  struct ImageIndex
  {
      GLenum type;
      GLint mipIndex;
      GLint layerIndex;
  
      ImageIndex(GLenum typeIn, GLint mipIndexIn, GLint layerIndexIn);
      ImageIndex(const ImageIndex &other);
      ImageIndex &operator=(const ImageIndex &other);
  
      bool hasLayer() const { return layerIndex != ENTIRE_LEVEL; }
  
      static ImageIndex Make2D(GLint mipIndex);
      static ImageIndex MakeCube(GLenum target, GLint mipIndex);
      static ImageIndex Make2DArray(GLint mipIndex, GLint layerIndex);
      static ImageIndex Make3D(GLint mipIndex, GLint layerIndex = ENTIRE_LEVEL);
  
      static const GLint ENTIRE_LEVEL = static_cast<GLint>(-1);
  };
  
  class ImageIndexIterator
  {
    public:
      static ImageIndexIterator Make2D(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);
  
      ImageIndex next();
      ImageIndex current() const;
      bool hasNext() const;
  
    private:
  
      ImageIndexIterator(GLenum type, const rx::Range<GLint> &mipRange,
                         const rx::Range<GLint> &layerRange, const GLsizei *layerCounts);
  
      GLint maxLayer() const;
  
      GLenum mType;
      rx::Range<GLint> mMipRange;
      rx::Range<GLint> mLayerRange;
      const GLsizei *mLayerCounts;
      GLint mCurrentMip;
      GLint mCurrentLayer;
  };
  
  }
  
  #endif // LIBGLESV2_IMAGE_INDEX_H_
  

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