1 /*
2 * Copyright 2016 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 SkBlendModePriv_DEFINED
9 #define SkBlendModePriv_DEFINED
10
11 #include "SkBlendMode.h"
12 #include "SkPM4f.h"
13
14 class SkRasterPipeline;
15
16 bool SkBlendMode_SupportsCoverageAsAlpha(SkBlendMode);
17
SkBlendMode_CaresAboutRBOrder(SkBlendMode mode)18 static inline bool SkBlendMode_CaresAboutRBOrder(SkBlendMode mode) {
19 return (mode > SkBlendMode::kLastSeparableMode);
20 }
21
22 bool SkBlendMode_ShouldPreScaleCoverage(SkBlendMode, bool rgb_coverage);
23 void SkBlendMode_AppendStages(SkBlendMode, SkRasterPipeline*);
24
25 enum class SkBlendModeCoeff {
26 kZero, /** 0 */
27 kOne, /** 1 */
28 kSC, /** src color */
29 kISC, /** inverse src color (i.e. 1 - sc) */
30 kDC, /** dst color */
31 kIDC, /** inverse dst color (i.e. 1 - dc) */
32 kSA, /** src alpha */
33 kISA, /** inverse src alpha (i.e. 1 - sa) */
34 kDA, /** dst alpha */
35 kIDA, /** inverse dst alpha (i.e. 1 - da) */
36
37 kCoeffCount
38 };
39
40 bool SkBlendMode_AsCoeff(SkBlendMode mode, SkBlendModeCoeff* src, SkBlendModeCoeff* dst);
41
42 SkPM4f SkBlendMode_Apply(SkBlendMode, const SkPM4f& src, const SkPM4f& dst);
43
44 #if SK_SUPPORT_GPU
45 #include "GrXferProcessor.h"
46 const GrXPFactory* SkBlendMode_AsXPFactory(SkBlendMode);
47 #endif
48
49 #endif
50