36352bf5e3
NOPRESUBMIT=true BUG=skia: DOCS_PREVIEW= https://skia.org/?cl=1037793002 Review URL: https://codereview.chromium.org/1037793002
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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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 override;
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virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
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const SkAlpha aa[]) const override;
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virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
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const SkAlpha aa[]) const override;
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SK_TO_STRING_OVERRIDE()
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLerpXfermode)
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protected:
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void flatten(SkWriteBuffer&) const 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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