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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gl/builders/GrGLProgramBuilder.h"
#include "GrYUVtoRGBEffect.h"
#include "GrCoordTransform.h"
#include "GrProcessor.h"
#include "gl/GrGLProcessor.h"
#include "GrTBackendProcessorFactory.h"
namespace {
class YUVtoRGBEffect : public GrFragmentProcessor {
public:
static GrFragmentProcessor* Create(GrTexture* yTexture, GrTexture* uTexture,
GrTexture* vTexture, SkYUVColorSpace colorSpace) {
return SkNEW_ARGS(YUVtoRGBEffect, (yTexture, uTexture, vTexture, colorSpace));
}
static const char* Name() { return "YUV to RGB"; }
virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE {
return GrTBackendFragmentProcessorFactory<YUVtoRGBEffect>::getInstance();
}
SkYUVColorSpace getColorSpace() const {
return fColorSpace;
}
class GLProcessor : public GrGLFragmentProcessor {
public:
static const GrGLfloat kJPEGConversionMatrix[16];
static const GrGLfloat kRec601ConversionMatrix[16];
// this class always generates the same code.
static void GenKey(const GrProcessor&, const GrGLCaps&, GrProcessorKeyBuilder*) {}
GLProcessor(const GrBackendProcessorFactory& factory,
const GrProcessor&)
: INHERITED(factory) {
}
virtual void emitCode(GrGLProgramBuilder* builder,
const GrFragmentProcessor&,
const GrProcessorKey&,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray& coords,
const TextureSamplerArray& samplers) SK_OVERRIDE {
GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
const char* yuvMatrix = NULL;
fMatrixUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
kMat44f_GrSLType, "YUVMatrix",
&yuvMatrix);
fsBuilder->codeAppendf("\t%s = vec4(\n\t\t", outputColor);
fsBuilder->appendTextureLookup(samplers[0], coords[0].c_str(), coords[0].getType());
fsBuilder->codeAppend(".r,\n\t\t");
fsBuilder->appendTextureLookup(samplers[1], coords[0].c_str(), coords[0].getType());
fsBuilder->codeAppend(".r,\n\t\t");
fsBuilder->appendTextureLookup(samplers[2], coords[0].c_str(), coords[0].getType());
fsBuilder->codeAppendf(".r,\n\t\t1.0) * %s;\n", yuvMatrix);
}
virtual void setData(const GrGLProgramDataManager& pdman,
const GrProcessor& processor) SK_OVERRIDE {
const YUVtoRGBEffect& yuvEffect = processor.cast<YUVtoRGBEffect>();
switch (yuvEffect.getColorSpace()) {
case kJPEG_SkYUVColorSpace:
pdman.setMatrix4f(fMatrixUni, kJPEGConversionMatrix);
break;
case kRec601_SkYUVColorSpace:
pdman.setMatrix4f(fMatrixUni, kRec601ConversionMatrix);
break;
}
}
private:
GrGLProgramDataManager::UniformHandle fMatrixUni;
typedef GrGLFragmentProcessor INHERITED;
};
private:
YUVtoRGBEffect(GrTexture* yTexture, GrTexture* uTexture, GrTexture* vTexture,
SkYUVColorSpace colorSpace)
: fCoordTransform(kLocal_GrCoordSet, GrCoordTransform::MakeDivByTextureWHMatrix(yTexture),
yTexture)
, fYAccess(yTexture)
, fUAccess(uTexture)
, fVAccess(vTexture)
, fColorSpace(colorSpace) {
this->addCoordTransform(&fCoordTransform);
this->addTextureAccess(&fYAccess);
this->addTextureAccess(&fUAccess);
this->addTextureAccess(&fVAccess);
this->setWillNotUseInputColor();
}
virtual bool onIsEqual(const GrProcessor& sBase) const {
const YUVtoRGBEffect& s = sBase.cast<YUVtoRGBEffect>();
return fYAccess.getTexture() == s.fYAccess.getTexture() &&
fUAccess.getTexture() == s.fUAccess.getTexture() &&
fVAccess.getTexture() == s.fVAccess.getTexture() &&
fColorSpace == s.getColorSpace();
}
virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
// YUV is opaque
inout->fColor = 0xFF;
inout->fValidFlags = kA_GrColorComponentFlag;
inout->fIsSingleComponent = false;
}
GrCoordTransform fCoordTransform;
GrTextureAccess fYAccess;
GrTextureAccess fUAccess;
GrTextureAccess fVAccess;
SkYUVColorSpace fColorSpace;
typedef GrFragmentProcessor INHERITED;
};
const GrGLfloat YUVtoRGBEffect::GLProcessor::kJPEGConversionMatrix[16] = {
1.0f, 0.0f, 1.402f, -0.701f,
1.0f, -0.34414f, -0.71414f, 0.529f,
1.0f, 1.772f, 0.0f, -0.886f,
0.0f, 0.0f, 0.0f, 1.0};
const GrGLfloat YUVtoRGBEffect::GLProcessor::kRec601ConversionMatrix[16] = {
1.164f, 0.0f, 1.596f, -0.87075f,
1.164f, -0.391f, -0.813f, 0.52925f,
1.164f, 2.018f, 0.0f, -1.08175f,
0.0f, 0.0f, 0.0f, 1.0};
}
//////////////////////////////////////////////////////////////////////////////
GrFragmentProcessor*
GrYUVtoRGBEffect::Create(GrTexture* yTexture, GrTexture* uTexture, GrTexture* vTexture,
SkYUVColorSpace colorSpace) {
return YUVtoRGBEffect::Create(yTexture, uTexture, vTexture, colorSpace);
}
|
