47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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/*
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* Copyright 2013 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 SkLerpXfermode_DEFINED
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#define SkLerpXfermode_DEFINED
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#include "SkXfermode.h"
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class SK_API SkLerpXfermode : public SkXfermode {
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public:
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/**
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* result = scale * src + (1 - scale) * dst
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*
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* When scale == 1, this is the same as kSrc_Mode
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* When scale == 0, this is the same as kDst_Mode
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*/
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static SkXfermode* Create(SkScalar scale);
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// overrides from SkXfermode
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virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
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const SkAlpha aa[]) const SK_OVERRIDE;
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virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
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const SkAlpha aa[]) const SK_OVERRIDE;
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virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
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const SkAlpha aa[]) const SK_OVERRIDE;
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SK_DEVELOPER_TO_STRING()
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLerpXfermode)
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protected:
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SkLerpXfermode(SkFlattenableReadBuffer&);
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virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
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private:
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SkLerpXfermode(unsigned scale256);
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unsigned fScale256; // 0..256
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typedef SkXfermode INHERITED;
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};
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#endif
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