1 /* 2 * Copyright 2015 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 */ 7 8 #ifndef GrXfermodeFragmentProcessor_DEFINED 9 #define GrXfermodeFragmentProcessor_DEFINED 10 11 #include "SkRefCnt.h" 12 #include "SkBlendMode.h" 13 14 class GrFragmentProcessor; 15 16 namespace GrXfermodeFragmentProcessor { 17 18 /** The color input to the returned processor is treated as the src and the passed in processor is 19 the dst. */ 20 std::unique_ptr<GrFragmentProcessor> MakeFromDstProcessor(std::unique_ptr<GrFragmentProcessor> dst, 21 SkBlendMode mode); 22 23 /** The color input to the returned processor is treated as the dst and the passed in processor is 24 the src. */ 25 std::unique_ptr<GrFragmentProcessor> MakeFromSrcProcessor(std::unique_ptr<GrFragmentProcessor> src, 26 SkBlendMode mode); 27 28 /** Takes the input color, which is assumed to be unpremultiplied, passes it as an opaque color 29 to both src and dst. The outputs of a src and dst are blended using mode and the original 30 input's alpha is applied to the blended color to produce a premul output. */ 31 std::unique_ptr<GrFragmentProcessor> MakeFromTwoProcessors(std::unique_ptr<GrFragmentProcessor> src, 32 std::unique_ptr<GrFragmentProcessor> dst, 33 SkBlendMode mode); 34 35 }; 36 37 #endif 38