52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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* Copyright 2016 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 SkBlendMode_DEFINED
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#define SkBlendMode_DEFINED
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enum class SkBlendMode {
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kClear, //!< [0, 0]
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kSrc, //!< [Sa, Sc]
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kDst, //!< [Da, Dc]
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kSrcOver, //!< [Sa + Da * (1 - Sa), Sc + Dc * (1 - Sa)]
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kDstOver, //!< [Da + Sa * (1 - Da), Dc + Sc * (1 - Da)]
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kSrcIn, //!< [Sa * Da, Sc * Da]
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kDstIn, //!< [Da * Sa, Dc * Sa]
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kSrcOut, //!< [Sa * (1 - Da), Sc * (1 - Da)]
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kDstOut, //!< [Da * (1 - Sa), Dc * (1 - Sa)]
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kSrcATop, //!< [Da, Sc * Da + Dc * (1 - Sa)]
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kDstATop, //!< [Sa, Dc * Sa + Sc * (1 - Da)]
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kXor, //!< [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + Dc * (1 - Sa)]
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kPlus, //!< [Sa + Da, Sc + Dc]
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kModulate, // multiplies all components (= alpha and color)
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// Following blend modes are defined in the CSS Compositing standard:
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// https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#blending
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kScreen,
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kLastCoeffMode = kScreen,
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kOverlay,
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kDarken,
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kLighten,
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kColorDodge,
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kColorBurn,
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kHardLight,
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kSoftLight,
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kDifference,
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kExclusion,
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kMultiply,
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kLastSeparableMode = kMultiply,
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kHue,
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kSaturation,
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kColor,
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kLuminosity,
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kLastMode = kLuminosity
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};
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#endif
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