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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrXfermodeFragmentProcessor_DEFINED
#define GrXfermodeFragmentProcessor_DEFINED
#include "SkRefCnt.h"
#include "SkBlendMode.h"
class GrFragmentProcessor;
namespace GrXfermodeFragmentProcessor {
/** The color input to the returned processor is treated as the src and the passed in processor is
the dst. */
std::unique_ptr<GrFragmentProcessor> MakeFromDstProcessor(std::unique_ptr<GrFragmentProcessor> dst,
SkBlendMode mode);
/** The color input to the returned processor is treated as the dst and the passed in processor is
the src. */
std::unique_ptr<GrFragmentProcessor> MakeFromSrcProcessor(std::unique_ptr<GrFragmentProcessor> src,
SkBlendMode mode);
/** Takes the input color, which is assumed to be unpremultiplied, passes it as an opaque color
to both src and dst. The outputs of a src and dst are blended using mode and the original
input's alpha is applied to the blended color to produce a premul output. */
std::unique_ptr<GrFragmentProcessor> MakeFromTwoProcessors(std::unique_ptr<GrFragmentProcessor> src,
std::unique_ptr<GrFragmentProcessor> dst,
SkBlendMode mode);
};
#endif
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