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 /** The color input to the returned processor is treated as the src and the passed in processor 18 is the dst. */ 19 sk_sp<GrFragmentProcessor> MakeFromDstProcessor(sk_sp<GrFragmentProcessor> dst, 20 SkBlendMode mode); 21 22 /** The color input to the returned processor is treated as the dst and the passed in processor 23 is the src. */ 24 sk_sp<GrFragmentProcessor> MakeFromSrcProcessor(sk_sp<GrFragmentProcessor> src, 25 SkBlendMode mode); 26 27 /** Takes the input color, which is assumed to be unpremultiplied, passes it as an opaque color 28 to both src and dst. The outputs of a src and dst are blended using mode and the original 29 input's alpha is applied to the blended color to produce a premul output. */ 30 sk_sp<GrFragmentProcessor> MakeFromTwoProcessors(sk_sp<GrFragmentProcessor> src, 31 sk_sp<GrFragmentProcessor> dst, 32 SkBlendMode mode); 33 }; 34 35 #endif 36