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

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• Hash : 18b75bad
  Author :
  Date : 2017-08-15T15:50:40
  

  D3D11: Handle Clear* commands for layered framebuffers
  
  According to the ANGLE_multiview spec, Clear* commands only affect
  the range of attached layers to the multi-view layered framebuffer.
  The patch extends ImageIndex so that the range of attached layers is
  tracked and a render target view can be created with that range of
  texture array slices attached.
  The special case of scissored clears for depth and stencil attachments
  is handled by instancing the same number of quads as there are views and
  selecting the layer within a geometry shader.
  
  BUG=angleproject:2062
  TEST=angle_end2end_tests
  
  Change-Id: Ibea248b980513f83d918652030a72c62c7ecd88b
  Reviewed-on: https://chromium-review.googlesource.com/632256
  Commit-Queue: Martin Radev <mradev@nvidia.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@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 "angle_gl.h"
  
  namespace gl
  {
  
  class ImageIndexIterator;
  
  struct ImageIndex
  {
      GLenum type;
      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;
  
      static ImageIndex Make2D(GLint mipIndex);
      static ImageIndex MakeRectangle(GLint mipIndex);
      static ImageIndex MakeCube(GLenum 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(GLenum target, GLint mipIndex);
      static ImageIndex Make2DMultisample();
  
      static ImageIndex MakeInvalid();
  
      static const GLint ENTIRE_LEVEL = static_cast<GLint>(-1);
  
      bool operator<(const ImageIndex &other) const;
      bool operator==(const ImageIndex &other) const;
      bool operator!=(const ImageIndex &other) const;
  
    private:
      friend class ImageIndexIterator;
  
      ImageIndex(GLenum typeIn, GLint mipIndexIn, GLint layerIndexIn, GLint numLayersIn);
  };
  
  class ImageIndexIterator
  {
    public:
      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(GLenum type, const Range<GLint> &mipRange,
                         const Range<GLint> &layerRange, const GLsizei *layerCounts);
  
      GLint maxLayer() const;
      void done();
  
      GLenum mType;
      Range<GLint> mMipRange;
      Range<GLint> mLayerRange;
      const GLsizei *mLayerCounts;
      GLint mCurrentMip;
      GLint mCurrentLayer;
  };
  
  }
  
  #endif // LIBANGLE_IMAGE_INDEX_H_
  

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