1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrPorterDuffXferProcessor_DEFINED
#define GrPorterDuffXferProcessor_DEFINED
#include "GrTypes.h"
#include "GrXferProcessor.h"
#include "SkXfermode.h"
class GrDrawState;
class GrInvariantOutput;
class GrPorterDuffXferProcessor : public GrXferProcessor {
public:
static GrXferProcessor* Create(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend,
GrColor constant = 0) {
return SkNEW_ARGS(GrPorterDuffXferProcessor, (srcBlend, dstBlend, constant));
}
virtual ~GrPorterDuffXferProcessor();
virtual const char* name() const { return "Porter Duff"; }
virtual void getGLProcessorKey(const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const SK_OVERRIDE;
virtual GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
virtual GrXferProcessor::OptFlags getOptimizations(const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
bool isCoverageDrawing,
bool colorWriteDisabled,
bool doesStencilWrite,
GrColor* color,
uint8_t* coverage) SK_OVERRIDE;
virtual void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const SK_OVERRIDE {
blendInfo->fSrcBlend = fSrcBlend;
blendInfo->fDstBlend = fDstBlend;
blendInfo->fBlendConstant = fBlendConstant;
}
private:
GrPorterDuffXferProcessor(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend, GrColor constant);
virtual bool onIsEqual(const GrFragmentProcessor& fpBase) const SK_OVERRIDE {
const GrPorterDuffXferProcessor& xp = fpBase.cast<GrPorterDuffXferProcessor>();
if (fSrcBlend != xp.fSrcBlend ||
fDstBlend != xp.fDstBlend ||
fBlendConstant != xp.fBlendConstant) {
return false;
}
return true;
}
virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
GrBlendCoeff fSrcBlend;
GrBlendCoeff fDstBlend;
GrColor fBlendConstant;
typedef GrXferProcessor INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class GrPorterDuffXPFactory : public GrXPFactory {
public:
static GrXPFactory* Create(SkXfermode::Mode mode);
static GrXPFactory* Create(SkXfermode::Coeff src, SkXfermode::Coeff dst) {
return SkNEW_ARGS(GrPorterDuffXPFactory, ((GrBlendCoeff)(src), (GrBlendCoeff)(dst)));
}
static GrXPFactory* Create(GrBlendCoeff src, GrBlendCoeff dst) {
return SkNEW_ARGS(GrPorterDuffXPFactory, (src, dst));
}
GrXferProcessor* createXferProcessor(const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI) const SK_OVERRIDE;
bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const SK_OVERRIDE;
bool canApplyCoverage(const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI,
bool isCoverageDrawing, bool colorWriteDisabled) const SK_OVERRIDE;
bool willBlendWithDst(const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI,
bool isCoverageDrawing, bool colorWriteDisabled) const SK_OVERRIDE;
bool canTweakAlphaForCoverage(bool isCoverageDrawing) const SK_OVERRIDE;
bool getOpaqueAndKnownColor(const GrProcOptInfo& colorPOI,
const GrProcOptInfo& coveragePOI,
GrColor* solidColor,
uint32_t* solidColorKnownComponents) const SK_OVERRIDE;
private:
GrPorterDuffXPFactory(GrBlendCoeff src, GrBlendCoeff dst);
bool onIsEqual(const GrXPFactory& xpfBase) const SK_OVERRIDE {
const GrPorterDuffXPFactory& xpf = xpfBase.cast<GrPorterDuffXPFactory>();
return (fSrcCoeff == xpf.fSrcCoeff && fDstCoeff == xpf.fDstCoeff);
}
GrBlendCoeff fSrcCoeff;
GrBlendCoeff fDstCoeff;
typedef GrXPFactory INHERITED;
};
#endif
|
