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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBlendModePriv.h"
#include "SkColorPriv.h"
#include "SkMathPriv.h"
#include "SkOnce.h"
#include "SkOpts.h"
#include "SkPM4f.h"
#include "SkRasterPipeline.h"
#include "SkReadBuffer.h"
#include "SkString.h"
#include "SkWriteBuffer.h"
#include "SkXfermodePriv.h"
#if SK_SUPPORT_GPU
#include "GrFragmentProcessor.h"
#include "effects/GrCustomXfermode.h"
#include "effects/GrPorterDuffXferProcessor.h"
#include "effects/GrXfermodeFragmentProcessor.h"
#endif
///////////////////////////////////////////////////////////////////////////////////////////////////
class SkProcCoeffXfermode : public SkXfermode {
public:
SkProcCoeffXfermode(SkBlendMode mode) : fMode(mode) {}
void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
const SkAlpha aa[]) const override {
SkASSERT(dst && src && count >= 0);
SkRasterPipeline_<256> p;
if (kN32_SkColorType == kBGRA_8888_SkColorType) {
p.append(SkRasterPipeline::load_bgra_dst, &dst);
p.append(SkRasterPipeline::load_bgra , &src);
} else {
p.append(SkRasterPipeline::load_8888_dst, &dst);
p.append(SkRasterPipeline::load_8888, &src);
}
SkBlendMode_AppendStagesNoClamp(fMode, &p);
if (aa) {
p.append(SkRasterPipeline::lerp_u8, &aa);
}
SkBlendMode_AppendClampIfNeeded(fMode, &p);
if (kN32_SkColorType == kBGRA_8888_SkColorType) {
p.append(SkRasterPipeline::store_bgra, &dst);
} else {
p.append(SkRasterPipeline::store_8888, &dst);
}
p.run(0, 0, count);
}
private:
const SkBlendMode fMode;
typedef SkXfermode INHERITED;
};
const char* SkBlendMode_Name(SkBlendMode mode) {
SkASSERT((unsigned) mode <= (unsigned)SkBlendMode::kLastMode);
const char* gModeStrings[] = {
"Clear", "Src", "Dst", "SrcOver", "DstOver", "SrcIn", "DstIn",
"SrcOut", "DstOut", "SrcATop", "DstATop", "Xor", "Plus",
"Modulate", "Screen", "Overlay", "Darken", "Lighten", "ColorDodge",
"ColorBurn", "HardLight", "SoftLight", "Difference", "Exclusion",
"Multiply", "Hue", "Saturation", "Color", "Luminosity"
};
return gModeStrings[(int)mode];
static_assert(SK_ARRAY_COUNT(gModeStrings) == (size_t)SkBlendMode::kLastMode + 1, "mode_count");
}
sk_sp<SkXfermode> SkXfermode::Make(SkBlendMode mode) {
if ((unsigned)mode > (unsigned)SkBlendMode::kLastMode) {
// report error
return nullptr;
}
// Skia's "default" mode is srcover. nullptr in SkPaint is interpreted as srcover
// so we can just return nullptr from the factory.
if (SkBlendMode::kSrcOver == mode) {
return nullptr;
}
const int COUNT_BLENDMODES = (int)SkBlendMode::kLastMode + 1;
static SkOnce once[COUNT_BLENDMODES];
static SkXfermode* cached[COUNT_BLENDMODES];
once[(int)mode]([mode] {
if (auto xfermode = SkOpts::create_xfermode(mode)) {
cached[(int)mode] = xfermode;
} else {
cached[(int)mode] = new SkProcCoeffXfermode(mode);
}
});
return sk_ref_sp(cached[(int)mode]);
}
///////////////////////////////////////////////////////////////////////////////////////////////////
bool SkXfermode::IsOpaque(SkBlendMode mode, SrcColorOpacity opacityType) {
SkBlendModeCoeff src, dst;
if (!SkBlendMode_AsCoeff(mode, &src, &dst)) {
return false;
}
switch (src) {
case SkBlendModeCoeff::kDA:
case SkBlendModeCoeff::kDC:
case SkBlendModeCoeff::kIDA:
case SkBlendModeCoeff::kIDC:
return false;
default:
break;
}
switch (dst) {
case SkBlendModeCoeff::kZero:
return true;
case SkBlendModeCoeff::kISA:
return kOpaque_SrcColorOpacity == opacityType;
case SkBlendModeCoeff::kSA:
return kTransparentBlack_SrcColorOpacity == opacityType ||
kTransparentAlpha_SrcColorOpacity == opacityType;
case SkBlendModeCoeff::kSC:
return kTransparentBlack_SrcColorOpacity == opacityType;
default:
return false;
}
return false;
}
#if SK_SUPPORT_GPU
const GrXPFactory* SkBlendMode_AsXPFactory(SkBlendMode mode) {
if (SkBlendMode_AsCoeff(mode, nullptr, nullptr)) {
const GrXPFactory* result = GrPorterDuffXPFactory::Get(mode);
SkASSERT(result);
return result;
}
SkASSERT(GrCustomXfermode::IsSupportedMode(mode));
return GrCustomXfermode::Get(mode);
}
#endif
|
