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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrColorSpaceXform.h"
#include "SkColorSpace.h"
#include "SkColorSpacePriv.h"
#include "SkMatrix44.h"
#include "glsl/GrGLSLColorSpaceXformHelper.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
sk_sp<GrColorSpaceXform> GrColorSpaceXform::Make(SkColorSpace* src, SkColorSpace* dst) {
// No transformation is performed in legacy mode, until SkColorSpaceXformCanvas is gone
if (!dst) {
return nullptr;
}
// Treat null sources as sRGB (safe because sRGB is a global singleton)
if (!src) {
src = SkColorSpace::MakeSRGB().get();
}
// TODO: Plumb source alpha type
SkColorSpaceXformSteps steps(src, kPremul_SkAlphaType, dst);
return steps.flags.mask() == 0 ? nullptr /* Noop transform */
: sk_make_sp<GrColorSpaceXform>(steps);
}
sk_sp<GrColorSpaceXform> GrColorSpaceXform::MakeUnpremulToUnpremul(SkColorSpace* src,
SkColorSpace* dst) {
// No transformation is performed in legacy mode, until SkColorSpaceXformCanvas is gone
if (!dst) {
return nullptr;
}
// Treat null sources as sRGB (safe because sRGB is a global singleton)
if (!src) {
src = SkColorSpace::MakeSRGB().get();
}
SkColorSpaceXformSteps steps = SkColorSpaceXformSteps::UnpremulToUnpremul(src, dst);
return steps.flags.mask() == 0 ? nullptr /* Noop transform */
: sk_make_sp<GrColorSpaceXform>(steps);
}
bool GrColorSpaceXform::Equals(const GrColorSpaceXform* a, const GrColorSpaceXform* b) {
if (a == b) {
return true;
}
if (!a || !b || a->fSteps.flags.mask() != b->fSteps.flags.mask()) {
return false;
}
if (a->fSteps.flags.linearize &&
0 != memcmp(&a->fSteps.srcTF, &b->fSteps.srcTF, sizeof(a->fSteps.srcTF))) {
return false;
}
if (a->fSteps.flags.gamut_transform &&
0 != memcmp(&a->fSteps.src_to_dst_matrix, &b->fSteps.src_to_dst_matrix,
sizeof(a->fSteps.src_to_dst_matrix))) {
return false;
}
if (a->fSteps.flags.encode &&
0 != memcmp(&a->fSteps.dstTFInv, &b->fSteps.dstTFInv, sizeof(a->fSteps.dstTFInv))) {
return false;
}
return true;
}
GrColor4f GrColorSpaceXform::apply(const GrColor4f& srcColor) {
GrColor4f result = srcColor;
fSteps.apply(result.fRGBA);
return result;
}
//////////////////////////////////////////////////////////////////////////////
class GrGLColorSpaceXformEffect : public GrGLSLFragmentProcessor {
public:
void emitCode(EmitArgs& args) override {
const GrColorSpaceXformEffect& csxe = args.fFp.cast<GrColorSpaceXformEffect>();
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
fColorSpaceHelper.emitCode(uniformHandler, csxe.colorXform());
if (this->numChildProcessors()) {
SkString childColor("src_color");
this->emitChild(0, &childColor, args);
SkString xformedColor;
fragBuilder->appendColorGamutXform(&xformedColor, childColor.c_str(), &fColorSpaceHelper);
fragBuilder->codeAppendf("%s = %s * %s;", args.fOutputColor, xformedColor.c_str(),
args.fInputColor);
} else {
if (nullptr == args.fInputColor) {
args.fInputColor = "half4(1)";
}
SkString xformedColor;
fragBuilder->appendColorGamutXform(&xformedColor, args.fInputColor, &fColorSpaceHelper);
fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, xformedColor.c_str());
}
}
private:
void onSetData(const GrGLSLProgramDataManager& pdman,
const GrFragmentProcessor& processor) override {
const GrColorSpaceXformEffect& csxe = processor.cast<GrColorSpaceXformEffect>();
fColorSpaceHelper.setData(pdman, csxe.colorXform());
}
GrGLSLColorSpaceXformHelper fColorSpaceHelper;
typedef GrGLSLFragmentProcessor INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
GrColorSpaceXformEffect::GrColorSpaceXformEffect(std::unique_ptr<GrFragmentProcessor> child,
sk_sp<GrColorSpaceXform> colorXform)
: INHERITED(kGrColorSpaceXformEffect_ClassID, OptFlags(child.get()))
, fColorXform(std::move(colorXform)) {
if (child) {
this->registerChildProcessor(std::move(child));
}
}
std::unique_ptr<GrFragmentProcessor> GrColorSpaceXformEffect::clone() const {
std::unique_ptr<GrFragmentProcessor> child =
this->numChildProcessors() ? this->childProcessor(0).clone() : nullptr;
return std::unique_ptr<GrFragmentProcessor>(
new GrColorSpaceXformEffect(std::move(child), fColorXform));
}
bool GrColorSpaceXformEffect::onIsEqual(const GrFragmentProcessor& s) const {
const GrColorSpaceXformEffect& other = s.cast<GrColorSpaceXformEffect>();
return GrColorSpaceXform::Equals(fColorXform.get(), other.fColorXform.get());
}
void GrColorSpaceXformEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) const {
b->add32(GrColorSpaceXform::XformKey(fColorXform.get()));
}
GrGLSLFragmentProcessor* GrColorSpaceXformEffect::onCreateGLSLInstance() const {
return new GrGLColorSpaceXformEffect();
}
GrFragmentProcessor::OptimizationFlags GrColorSpaceXformEffect::OptFlags(
const GrFragmentProcessor* child) {
// TODO: Implement constant output for constant input
if (child) {
OptimizationFlags flags = kNone_OptimizationFlags;
if (child->compatibleWithCoverageAsAlpha()) {
flags |= kCompatibleWithCoverageAsAlpha_OptimizationFlag;
}
if (child->preservesOpaqueInput()) {
flags |= kPreservesOpaqueInput_OptimizationFlag;
}
return flags;
} else {
return kCompatibleWithCoverageAsAlpha_OptimizationFlag |
kPreservesOpaqueInput_OptimizationFlag;
}
}
std::unique_ptr<GrFragmentProcessor> GrColorSpaceXformEffect::Make(SkColorSpace* src,
SkColorSpace* dst) {
auto xform = GrColorSpaceXform::Make(src, dst);
if (!xform) {
return nullptr;
}
return std::unique_ptr<GrFragmentProcessor>(new GrColorSpaceXformEffect(nullptr,
std::move(xform)));
}
std::unique_ptr<GrFragmentProcessor> GrColorSpaceXformEffect::Make(
std::unique_ptr<GrFragmentProcessor> child,
SkColorSpace* src, SkColorSpace* dst) {
if (!child) {
return nullptr;
}
auto xform = GrColorSpaceXform::Make(src, dst);
if (!xform) {
return child;
}
return std::unique_ptr<GrFragmentProcessor>(new GrColorSpaceXformEffect(std::move(child),
std::move(xform)));
}
|
