51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SkPixelXorXfermode_DEFINED
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#define SkPixelXorXfermode_DEFINED
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#include "SkXfermode.h"
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/** SkPixelXorXfermode implements a simple pixel xor (op ^ src ^ dst).
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This transformation does not follow premultiplied conventions, therefore
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this proc *always* returns an opaque color (alpha == 255). Thus it is
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not really usefull for operating on blended colors.
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*/
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class SkPixelXorXfermode : public SkXfermode {
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public:
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SkPixelXorXfermode(SkColor opColor) : fOpColor(opColor) {}
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// override from SkFlattenable
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virtual Factory getFactory();
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virtual void flatten(SkFlattenableWriteBuffer&);
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protected:
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// override from SkXfermode
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virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst);
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private:
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SkColor fOpColor;
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SkPixelXorXfermode(SkFlattenableReadBuffer& rb);
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// our private factory
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static SkFlattenable* Create(SkFlattenableReadBuffer&);
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typedef SkXfermode INHERITED;
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};
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#endif
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