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
|
/*
* 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 "GrGLSLGeometryProcessor.h"
#include "GrCoordTransform.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLProcessorTypes.h"
#include "glsl/GrGLSLUniformHandler.h"
#include "glsl/GrGLSLVarying.h"
#include "glsl/GrGLSLVertexShaderBuilder.h"
void GrGLSLGeometryProcessor::emitCode(EmitArgs& args) {
GrGLSLVertexBuilder* vBuilder = args.fVertBuilder;
GrGPArgs gpArgs;
this->onEmitCode(args, &gpArgs);
vBuilder->transformToNormalizedDeviceSpace(gpArgs.fPositionVar);
}
void GrGLSLGeometryProcessor::emitTransforms(GrGLSLVertexBuilder* vb,
GrGLSLVaryingHandler* varyingHandler,
GrGLSLUniformHandler* uniformHandler,
const GrShaderVar& posVar,
const char* localCoords,
const SkMatrix& localMatrix,
const TransformsIn& tin,
TransformsOut* tout) {
tout->push_back_n(tin.count());
fInstalledTransforms.push_back_n(tin.count());
for (int i = 0; i < tin.count(); i++) {
const ProcCoords& coordTransforms = tin[i];
fInstalledTransforms[i].push_back_n(coordTransforms.count());
for (int t = 0; t < coordTransforms.count(); t++) {
SkString strUniName("StageMatrix");
strUniName.appendf("_%i_%i", i, t);
GrSLType varyingType;
GrCoordSet coordType = coordTransforms[t]->sourceCoords();
uint32_t type = coordTransforms[t]->getMatrix().getType();
if (kLocal_GrCoordSet == coordType) {
type |= localMatrix.getType();
}
varyingType = SkToBool(SkMatrix::kPerspective_Mask & type) ? kVec3f_GrSLType :
kVec2f_GrSLType;
GrSLPrecision precision = coordTransforms[t]->precision();
const char* uniName;
fInstalledTransforms[i][t].fHandle =
uniformHandler->addUniform(GrGLSLUniformHandler::kVertex_Visibility,
kMat33f_GrSLType, precision,
strUniName.c_str(),
&uniName).toIndex();
SkString strVaryingName("MatrixCoord");
strVaryingName.appendf("_%i_%i", i, t);
GrGLSLVertToFrag v(varyingType);
varyingHandler->addVarying(strVaryingName.c_str(), &v, precision);
SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
SkNEW_APPEND_TO_TARRAY(&(*tout)[i], GrGLSLTransformedCoords,
(SkString(v.fsIn()), varyingType));
// varying = matrix * coords (logically)
if (kDevice_GrCoordSet == coordType) {
if (kVec2f_GrSLType == varyingType) {
if (kVec2f_GrSLType == posVar.getType()) {
vb->codeAppendf("%s = (%s * vec3(%s, 1)).xy;",
v.vsOut(), uniName, posVar.c_str());
} else {
// The brackets here are just to scope the temp variable
vb->codeAppendf("{ vec3 temp = %s * %s;", uniName, posVar.c_str());
vb->codeAppendf("%s = vec2(temp.x/temp.z, temp.y/temp.z); }", v.vsOut());
}
} else {
if (kVec2f_GrSLType == posVar.getType()) {
vb->codeAppendf("%s = %s * vec3(%s, 1);",
v.vsOut(), uniName, posVar.c_str());
} else {
vb->codeAppendf("%s = %s * %s;", v.vsOut(), uniName, posVar.c_str());
}
}
} else {
if (kVec2f_GrSLType == varyingType) {
vb->codeAppendf("%s = (%s * vec3(%s, 1)).xy;", v.vsOut(), uniName, localCoords);
} else {
vb->codeAppendf("%s = %s * vec3(%s, 1);", v.vsOut(), uniName, localCoords);
}
}
}
}
}
void GrGLSLGeometryProcessor::emitTransforms(GrGLSLVertexBuilder* vb,
GrGLSLVaryingHandler* varyingHandler,
const char* localCoords,
const TransformsIn& tin,
TransformsOut* tout) {
tout->push_back_n(tin.count());
for (int i = 0; i < tin.count(); i++) {
const ProcCoords& coordTransforms = tin[i];
for (int t = 0; t < coordTransforms.count(); t++) {
GrSLType varyingType = kVec2f_GrSLType;
// Device coords aren't supported
SkASSERT(kDevice_GrCoordSet != coordTransforms[t]->sourceCoords());
GrSLPrecision precision = coordTransforms[t]->precision();
SkString strVaryingName("MatrixCoord");
strVaryingName.appendf("_%i_%i", i, t);
GrGLSLVertToFrag v(varyingType);
varyingHandler->addVarying(strVaryingName.c_str(), &v, precision);
vb->codeAppendf("%s = %s;", v.vsOut(), localCoords);
SkNEW_APPEND_TO_TARRAY(&(*tout)[i],
GrGLSLTransformedCoords,
(SkString(v.fsIn()), varyingType));
}
}
}
void GrGLSLGeometryProcessor::setupPosition(GrGLSLVertexBuilder* vertBuilder,
GrGPArgs* gpArgs,
const char* posName) {
gpArgs->fPositionVar.set(kVec2f_GrSLType, "pos2");
vertBuilder->codeAppendf("vec2 %s = %s;", gpArgs->fPositionVar.c_str(), posName);
}
void GrGLSLGeometryProcessor::setupPosition(GrGLSLVertexBuilder* vertBuilder,
GrGLSLUniformHandler* uniformHandler,
GrGPArgs* gpArgs,
const char* posName,
const SkMatrix& mat,
UniformHandle* viewMatrixUniform) {
if (mat.isIdentity()) {
gpArgs->fPositionVar.set(kVec2f_GrSLType, "pos2");
vertBuilder->codeAppendf("vec2 %s = %s;", gpArgs->fPositionVar.c_str(), posName);
} else {
const char* viewMatrixName;
*viewMatrixUniform = uniformHandler->addUniform(GrGLSLUniformHandler::kVertex_Visibility,
kMat33f_GrSLType, kHigh_GrSLPrecision,
"uViewM",
&viewMatrixName);
if (!mat.hasPerspective()) {
gpArgs->fPositionVar.set(kVec2f_GrSLType, "pos2");
vertBuilder->codeAppendf("vec2 %s = vec2(%s * vec3(%s, 1));",
gpArgs->fPositionVar.c_str(), viewMatrixName, posName);
} else {
gpArgs->fPositionVar.set(kVec3f_GrSLType, "pos3");
vertBuilder->codeAppendf("vec3 %s = %s * vec3(%s, 1);",
gpArgs->fPositionVar.c_str(), viewMatrixName, posName);
}
}
}
|
