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
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrPathProcessor.h"
#include "GrShaderCaps.h"
#include "gl/GrGLGpu.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLUniformHandler.h"
#include "glsl/GrGLSLVarying.h"
class GrGLPathProcessor : public GrGLSLPrimitiveProcessor {
public:
GrGLPathProcessor() : fColor(GrColor_ILLEGAL) {}
static void GenKey(const GrPathProcessor& pathProc,
const GrShaderCaps&,
GrProcessorKeyBuilder* b) {
b->add32(SkToInt(pathProc.viewMatrix().hasPerspective()));
}
void emitCode(EmitArgs& args) override {
GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
const GrPathProcessor& pathProc = args.fGP.cast<GrPathProcessor>();
if (!pathProc.viewMatrix().hasPerspective()) {
args.fVaryingHandler->setNoPerspective();
}
// emit transforms
this->emitTransforms(args.fVaryingHandler, args.fFPCoordTransformHandler);
// Setup uniform color
const char* stagedLocalVarName;
fColorUniform = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
kVec4f_GrSLType,
kDefault_GrSLPrecision,
"Color",
&stagedLocalVarName);
fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, stagedLocalVarName);
// setup constant solid coverage
fragBuilder->codeAppendf("%s = float4(1);", args.fOutputCoverage);
}
void emitTransforms(GrGLSLVaryingHandler* varyingHandler,
FPCoordTransformHandler* transformHandler) {
int i = 0;
while (const GrCoordTransform* coordTransform = transformHandler->nextCoordTransform()) {
GrSLType varyingType =
coordTransform->getMatrix().hasPerspective() ? kVec3f_GrSLType
: kVec2f_GrSLType;
SkString strVaryingName;
strVaryingName.printf("TransformedCoord_%d", i);
GrGLSLVertToFrag v(varyingType);
GrGLVaryingHandler* glVaryingHandler = (GrGLVaryingHandler*) varyingHandler;
fInstalledTransforms.push_back().fHandle =
glVaryingHandler->addPathProcessingVarying(strVaryingName.c_str(),
&v).toIndex();
fInstalledTransforms.back().fType = varyingType;
transformHandler->specifyCoordsForCurrCoordTransform(SkString(v.fsIn()), varyingType);
++i;
}
}
void setData(const GrGLSLProgramDataManager& pd,
const GrPrimitiveProcessor& primProc,
FPCoordTransformIter&& transformIter) override {
const GrPathProcessor& pathProc = primProc.cast<GrPathProcessor>();
if (pathProc.color() != fColor) {
float c[4];
GrColorToRGBAFloat(pathProc.color(), c);
pd.set4fv(fColorUniform, 1, c);
fColor = pathProc.color();
}
int t = 0;
while (const GrCoordTransform* coordTransform = transformIter.next()) {
SkASSERT(fInstalledTransforms[t].fHandle.isValid());
const SkMatrix& m = GetTransformMatrix(pathProc.localMatrix(), *coordTransform);
if (fInstalledTransforms[t].fCurrentValue.cheapEqualTo(m)) {
continue;
}
fInstalledTransforms[t].fCurrentValue = m;
SkASSERT(fInstalledTransforms[t].fType == kVec2f_GrSLType ||
fInstalledTransforms[t].fType == kVec3f_GrSLType);
unsigned components = fInstalledTransforms[t].fType == kVec2f_GrSLType ? 2 : 3;
pd.setPathFragmentInputTransform(fInstalledTransforms[t].fHandle, components, m);
++t;
}
}
private:
typedef GrGLSLProgramDataManager::VaryingHandle VaryingHandle;
struct TransformVarying {
VaryingHandle fHandle;
SkMatrix fCurrentValue = SkMatrix::InvalidMatrix();
GrSLType fType = kVoid_GrSLType;
};
SkTArray<TransformVarying, true> fInstalledTransforms;
UniformHandle fColorUniform;
GrColor fColor;
typedef GrGLSLPrimitiveProcessor INHERITED;
};
GrPathProcessor::GrPathProcessor(GrColor color,
const SkMatrix& viewMatrix,
const SkMatrix& localMatrix)
: fColor(color)
, fViewMatrix(viewMatrix)
, fLocalMatrix(localMatrix) {
this->initClassID<GrPathProcessor>();
}
void GrPathProcessor::getGLSLProcessorKey(const GrShaderCaps& caps,
GrProcessorKeyBuilder* b) const {
GrGLPathProcessor::GenKey(*this, caps, b);
}
GrGLSLPrimitiveProcessor* GrPathProcessor::createGLSLInstance(const GrShaderCaps& caps) const {
SkASSERT(caps.pathRenderingSupport());
return new GrGLPathProcessor();
}
|
