50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/*
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* Copyright 2018 Google Inc.
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*
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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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#ifndef SkYUVAIndex_DEFINED
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#define SkYUVAIndex_DEFINED
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#include "SkTypes.h"
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/** \enum SkColorChannel
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Describes different color channels one can manipulate
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*/
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enum class SkColorChannel {
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kR, // the red channel
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kG, // the green channel
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kB, // the blue channel
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kA, // the alpha channel
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kLastEnum = kA,
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};
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/** \struct SkYUVAIndex
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Describes from which image source and which channel to read each individual YUVA plane.
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SkYUVAIndex contains a index for which image source to read from and a enum for which channel
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to read from.
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*/
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struct SK_API SkYUVAIndex {
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// Index in the array of SkYUVAIndex
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enum Index {
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kY_Index = 0,
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kU_Index = 1,
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kV_Index = 2,
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kA_Index = 3
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};
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/** The index is a number between -1..3 which definies which image source to read from, where -1
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* means the image source doesn't exist. The assumption is we will always have image sources for
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* each of YUV planes, but optionally have image source for A plane. */
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int fIndex;
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/** The channel describes from which channel to read the info from. Currently we only deal with
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* YUV and NV12 and channel info is ignored. */
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SkColorChannel fChannel;
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};
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#endif
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