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Pale Moon
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
//
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// Copyright 2014 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// ImageIndex.h: A helper struct for indexing into an Image array
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#ifndef LIBANGLE_IMAGE_INDEX_H_
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#define LIBANGLE_IMAGE_INDEX_H_
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#include "common/mathutil.h"
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#include "angle_gl.h"
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namespace gl
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{
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class ImageIndexIterator;
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struct ImageIndex
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{
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GLenum type;
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GLint mipIndex;
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GLint layerIndex;
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ImageIndex(const ImageIndex &other);
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ImageIndex &operator=(const ImageIndex &other);
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bool hasLayer() const { return layerIndex != ENTIRE_LEVEL; }
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static ImageIndex Make2D(GLint mipIndex);
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static ImageIndex MakeCube(GLenum target, GLint mipIndex);
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static ImageIndex Make2DArray(GLint mipIndex, GLint layerIndex);
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static ImageIndex Make3D(GLint mipIndex, GLint layerIndex = ENTIRE_LEVEL);
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static ImageIndex MakeGeneric(GLenum target, GLint mipIndex);
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static ImageIndex MakeInvalid();
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static const GLint ENTIRE_LEVEL = static_cast<GLint>(-1);
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bool operator<(const ImageIndex &other) const;
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private:
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friend class ImageIndexIterator;
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ImageIndex(GLenum typeIn, GLint mipIndexIn, GLint layerIndexIn);
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};
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class ImageIndexIterator
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{
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public:
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static ImageIndexIterator Make2D(GLint minMip, GLint maxMip);
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static ImageIndexIterator MakeCube(GLint minMip, GLint maxMip);
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static ImageIndexIterator Make3D(GLint minMip, GLint maxMip, GLint minLayer, GLint maxLayer);
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static ImageIndexIterator Make2DArray(GLint minMip, GLint maxMip, const GLsizei *layerCounts);
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ImageIndex next();
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ImageIndex current() const;
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bool hasNext() const;
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private:
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ImageIndexIterator(GLenum type, const Range<GLint> &mipRange,
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const Range<GLint> &layerRange, const GLsizei *layerCounts);
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GLint maxLayer() const;
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GLenum mType;
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Range<GLint> mMipRange;
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Range<GLint> mLayerRange;
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const GLsizei *mLayerCounts;
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GLint mCurrentMip;
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GLint mCurrentLayer;
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};
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}
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#endif // LIBANGLE_IMAGE_INDEX_H_
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