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
|
/*
* 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 "GrYUVtoRGBEffect.h"
#include "GrCoordTransform.h"
#include "GrInvariantOutput.h"
#include "GrProcessor.h"
#include "gl/GrGLProcessor.h"
#include "gl/builders/GrGLProgramBuilder.h"
namespace {
class YUVtoRGBEffect : public GrFragmentProcessor {
public:
static GrFragmentProcessor* Create(GrTexture* yTexture, GrTexture* uTexture,
GrTexture* vTexture, SkISize sizes[3],
SkYUVColorSpace colorSpace) {
SkScalar w[3], h[3];
w[0] = SkIntToScalar(sizes[0].fWidth) / SkIntToScalar(yTexture->width());
h[0] = SkIntToScalar(sizes[0].fHeight) / SkIntToScalar(yTexture->height());
w[1] = SkIntToScalar(sizes[1].fWidth) / SkIntToScalar(uTexture->width());
h[1] = SkIntToScalar(sizes[1].fHeight) / SkIntToScalar(uTexture->height());
w[2] = SkIntToScalar(sizes[2].fWidth) / SkIntToScalar(vTexture->width());
h[2] = SkIntToScalar(sizes[2].fHeight) / SkIntToScalar(vTexture->height());
SkMatrix yuvMatrix[3];
yuvMatrix[0] = GrCoordTransform::MakeDivByTextureWHMatrix(yTexture);
yuvMatrix[1] = yuvMatrix[0];
yuvMatrix[1].preScale(w[1] / w[0], h[1] / h[0]);
yuvMatrix[2] = yuvMatrix[0];
yuvMatrix[2].preScale(w[2] / w[0], h[2] / h[0]);
GrTextureParams::FilterMode uvFilterMode =
((sizes[1].fWidth != sizes[0].fWidth) ||
(sizes[1].fHeight != sizes[0].fHeight) ||
(sizes[2].fWidth != sizes[0].fWidth) ||
(sizes[2].fHeight != sizes[0].fHeight)) ?
GrTextureParams::kBilerp_FilterMode :
GrTextureParams::kNone_FilterMode;
return SkNEW_ARGS(YUVtoRGBEffect, (yTexture, uTexture, vTexture, yuvMatrix,
uvFilterMode, colorSpace));
}
const char* name() const override { return "YUV to RGB"; }
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 GrProcessor&) {}
virtual void emitCode(GrGLFPBuilder* builder,
const GrFragmentProcessor&,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray& coords,
const TextureSamplerArray& samplers) override {
GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
const char* yuvMatrix = NULL;
fMatrixUni = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
kMat44f_GrSLType, kDefault_GrSLPrecision,
"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[1].c_str(), coords[1].getType());
fsBuilder->codeAppend(".r,\n\t\t");
fsBuilder->appendTextureLookup(samplers[2], coords[2].c_str(), coords[2].getType());
fsBuilder->codeAppendf(".r,\n\t\t1.0) * %s;\n", yuvMatrix);
}
virtual void setData(const GrGLProgramDataManager& pdman,
const GrProcessor& processor) 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;
};
virtual void getGLProcessorKey(const GrGLCaps& caps,
GrProcessorKeyBuilder* b) const override {
GLProcessor::GenKey(*this, caps, b);
}
GrGLFragmentProcessor* createGLInstance() const override {
return SkNEW_ARGS(GLProcessor, (*this));
}
private:
YUVtoRGBEffect(GrTexture* yTexture, GrTexture* uTexture, GrTexture* vTexture,
SkMatrix yuvMatrix[3], GrTextureParams::FilterMode uvFilterMode,
SkYUVColorSpace colorSpace)
: fYTransform(kLocal_GrCoordSet, yuvMatrix[0], yTexture, GrTextureParams::kNone_FilterMode)
, fYAccess(yTexture)
, fUTransform(kLocal_GrCoordSet, yuvMatrix[1], uTexture, uvFilterMode)
, fUAccess(uTexture, uvFilterMode)
, fVTransform(kLocal_GrCoordSet, yuvMatrix[2], vTexture, uvFilterMode)
, fVAccess(vTexture, uvFilterMode)
, fColorSpace(colorSpace) {
this->initClassID<YUVtoRGBEffect>();
this->addCoordTransform(&fYTransform);
this->addTextureAccess(&fYAccess);
this->addCoordTransform(&fUTransform);
this->addTextureAccess(&fUAccess);
this->addCoordTransform(&fVTransform);
this->addTextureAccess(&fVAccess);
}
bool onIsEqual(const GrFragmentProcessor& sBase) const override {
const YUVtoRGBEffect& s = sBase.cast<YUVtoRGBEffect>();
return fColorSpace == s.getColorSpace();
}
void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
// YUV is opaque
inout->setToOther(kA_GrColorComponentFlag, 0xFF << GrColor_SHIFT_A,
GrInvariantOutput::kWillNot_ReadInput);
}
GrCoordTransform fYTransform;
GrTextureAccess fYAccess;
GrCoordTransform fUTransform;
GrTextureAccess fUAccess;
GrCoordTransform fVTransform;
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,
SkISize sizes[3], SkYUVColorSpace colorSpace) {
SkASSERT(yTexture && uTexture && vTexture && sizes);
return YUVtoRGBEffect::Create(yTexture, uTexture, vTexture, sizes, colorSpace);
}
|
