The Tor Browser: gfx/skia/trunk/include/effects/SkLerpXfermode.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright 2013 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #ifndef SkLerpXfermode_DEFINED

     9 #define SkLerpXfermode_DEFINED

    11 #include "SkXfermode.h"

    13 class SK_API SkLerpXfermode : public SkXfermode {

    14 public:

    15     /**

    16      *  result = scale * src + (1 - scale) * dst

    17      *

    18      *  When scale == 1, this is the same as kSrc_Mode

    19      *  When scale == 0, this is the same as kDst_Mode

    20      */

    21     static SkXfermode* Create(SkScalar scale);

    23     // overrides from SkXfermode

    24     virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,

    25                         const SkAlpha aa[]) const SK_OVERRIDE;

    26     virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,

    27                         const SkAlpha aa[]) const SK_OVERRIDE;

    28     virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,

    29                         const SkAlpha aa[]) const SK_OVERRIDE;

    31     SK_TO_STRING_OVERRIDE()

    32     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLerpXfermode)

    34 protected:

    35     SkLerpXfermode(SkReadBuffer&);

    36     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;

    38 private:

    39     SkLerpXfermode(unsigned scale256);

    41     unsigned fScale256;  // 0..256

    43     typedef SkXfermode INHERITED;

    44 };

    46 #endif

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