1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/effects/SkLerpXfermode.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,46 @@
1.4 +/*
1.5 + * Copyright 2013 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkLerpXfermode_DEFINED
1.12 +#define SkLerpXfermode_DEFINED
1.13 +
1.14 +#include "SkXfermode.h"
1.15 +
1.16 +class SK_API SkLerpXfermode : public SkXfermode {
1.17 +public:
1.18 + /**
1.19 + * result = scale * src + (1 - scale) * dst
1.20 + *
1.21 + * When scale == 1, this is the same as kSrc_Mode
1.22 + * When scale == 0, this is the same as kDst_Mode
1.23 + */
1.24 + static SkXfermode* Create(SkScalar scale);
1.25 +
1.26 + // overrides from SkXfermode
1.27 + virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
1.28 + const SkAlpha aa[]) const SK_OVERRIDE;
1.29 + virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
1.30 + const SkAlpha aa[]) const SK_OVERRIDE;
1.31 + virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
1.32 + const SkAlpha aa[]) const SK_OVERRIDE;
1.33 +
1.34 + SK_TO_STRING_OVERRIDE()
1.35 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLerpXfermode)
1.36 +
1.37 +protected:
1.38 + SkLerpXfermode(SkReadBuffer&);
1.39 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.40 +
1.41 +private:
1.42 + SkLerpXfermode(unsigned scale256);
1.43 +
1.44 + unsigned fScale256; // 0..256
1.45 +
1.46 + typedef SkXfermode INHERITED;
1.47 +};
1.48 +
1.49 +#endif
