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
|
/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrCCPRCoverageProcessor.h"
#include "SkMakeUnique.h"
#include "ccpr/GrCCPRCubicShader.h"
#include "ccpr/GrCCPRQuadraticShader.h"
#include "ccpr/GrCCPRTriangleShader.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
GrCCPRCoverageProcessor::GrCCPRCoverageProcessor(RenderPass renderPass)
: INHERITED(kGrCCPRCoverageProcessor_ClassID)
, fRenderPass(renderPass) {
if (RenderPassIsCubic(fRenderPass)) {
this->addInstanceAttrib("X", kFloat4_GrVertexAttribType);
this->addInstanceAttrib("Y", kFloat4_GrVertexAttribType);
SkASSERT(offsetof(CubicInstance, fX) ==
this->getInstanceAttrib(InstanceAttribs::kX).fOffsetInRecord);
SkASSERT(offsetof(CubicInstance, fY) ==
this->getInstanceAttrib(InstanceAttribs::kY).fOffsetInRecord);
SkASSERT(sizeof(CubicInstance) == this->getInstanceStride());
} else {
this->addInstanceAttrib("X", kFloat3_GrVertexAttribType);
this->addInstanceAttrib("Y", kFloat3_GrVertexAttribType);
SkASSERT(offsetof(TriangleInstance, fX) ==
this->getInstanceAttrib(InstanceAttribs::kX).fOffsetInRecord);
SkASSERT(offsetof(TriangleInstance, fY) ==
this->getInstanceAttrib(InstanceAttribs::kY).fOffsetInRecord);
SkASSERT(sizeof(TriangleInstance) == this->getInstanceStride());
}
this->setWillUseGeoShader();
}
void GrCCPRCoverageProcessor::Shader::emitVaryings(GrGLSLVaryingHandler* varyingHandler,
SkString* code, const char* position,
const char* coverage, const char* wind) {
WindHandling windHandling = this->onEmitVaryings(varyingHandler, code, position, coverage,
wind);
if (WindHandling::kNotHandled == windHandling) {
varyingHandler->addFlatVarying("wind", &fWind);
code->appendf("%s = %s;", fWind.gsOut(), wind);
}
}
void GrCCPRCoverageProcessor::Shader::emitFragmentCode(const GrCCPRCoverageProcessor& proc,
GrGLSLPPFragmentBuilder* f,
const char* skOutputColor,
const char* skOutputCoverage) const {
f->codeAppendf("half coverage = 0;");
this->onEmitFragmentCode(f, "coverage");
if (fWind.fsIn()) {
f->codeAppendf("%s.a = coverage * %s;", skOutputColor, fWind.fsIn());
} else {
f->codeAppendf("%s.a = coverage;", skOutputColor);
}
f->codeAppendf("%s = half4(1);", skOutputCoverage);
#ifdef SK_DEBUG
if (proc.debugVisualizationsEnabled()) {
f->codeAppendf("%s = half4(-%s.a, %s.a, 0, 1);",
skOutputColor, skOutputColor, skOutputColor);
}
#endif
}
void GrCCPRCoverageProcessor::Shader::EmitEdgeDistanceEquation(GrGLSLShaderBuilder* s,
const char* leftPt,
const char* rightPt,
const char* outputDistanceEquation) {
s->codeAppendf("float2 n = float2(%s.y - %s.y, %s.x - %s.x);",
rightPt, leftPt, leftPt, rightPt);
s->codeAppend ("float nwidth = (abs(n.x) + abs(n.y)) * (bloat * 2);");
// When nwidth=0, wind must also be 0 (and coverage * wind = 0). So it doesn't matter what we
// come up with here as long as it isn't NaN or Inf.
s->codeAppend ("n /= (0 != nwidth) ? nwidth : 1;");
s->codeAppendf("%s = float3(-n, dot(n, %s) - .5);", outputDistanceEquation, leftPt);
}
int GrCCPRCoverageProcessor::Shader::DefineSoftSampleLocations(GrGLSLPPFragmentBuilder* f,
const char* samplesName) {
// Standard DX11 sample locations.
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_IOS)
f->defineConstant("float2[8]", samplesName, "float2[8]("
"float2(+1, -3)/16, float2(-1, +3)/16, float2(+5, +1)/16, float2(-3, -5)/16, "
"float2(-5, +5)/16, float2(-7, -1)/16, float2(+3, +7)/16, float2(+7, -7)/16."
")");
return 8;
#else
f->defineConstant("float2[16]", samplesName, "float2[16]("
"float2(+1, +1)/16, float2(-1, -3)/16, float2(-3, +2)/16, float2(+4, -1)/16, "
"float2(-5, -2)/16, float2(+2, +5)/16, float2(+5, +3)/16, float2(+3, -5)/16, "
"float2(-2, +6)/16, float2( 0, -7)/16, float2(-4, -6)/16, float2(-6, +4)/16, "
"float2(-8, 0)/16, float2(+7, -4)/16, float2(+6, +7)/16, float2(-7, -8)/16."
")");
return 16;
#endif
}
void GrCCPRCoverageProcessor::getGLSLProcessorKey(const GrShaderCaps&,
GrProcessorKeyBuilder* b) const {
b->add32((int)fRenderPass);
}
GrGLSLPrimitiveProcessor* GrCCPRCoverageProcessor::createGLSLInstance(const GrShaderCaps&) const {
std::unique_ptr<Shader> shader;
switch (fRenderPass) {
using CubicType = GrCCPRCubicShader::CubicType;
case RenderPass::kTriangleHulls:
shader = skstd::make_unique<GrCCPRTriangleHullShader>();
break;
case RenderPass::kTriangleEdges:
shader = skstd::make_unique<GrCCPRTriangleEdgeShader>();
break;
case RenderPass::kTriangleCorners:
shader = skstd::make_unique<GrCCPRTriangleCornerShader>();
break;
case RenderPass::kQuadraticHulls:
shader = skstd::make_unique<GrCCPRQuadraticHullShader>();
break;
case RenderPass::kQuadraticCorners:
shader = skstd::make_unique<GrCCPRQuadraticCornerShader>();
break;
case RenderPass::kSerpentineHulls:
shader = skstd::make_unique<GrCCPRCubicHullShader>(CubicType::kSerpentine);
break;
case RenderPass::kLoopHulls:
shader = skstd::make_unique<GrCCPRCubicHullShader>(CubicType::kLoop);
break;
case RenderPass::kSerpentineCorners:
shader = skstd::make_unique<GrCCPRCubicCornerShader>(CubicType::kSerpentine);
break;
case RenderPass::kLoopCorners:
shader = skstd::make_unique<GrCCPRCubicCornerShader>(CubicType::kLoop);
break;
}
return CreateGSImpl(std::move(shader));
}
const char* GrCCPRCoverageProcessor::GetRenderPassName(RenderPass renderPass) {
switch (renderPass) {
case RenderPass::kTriangleHulls:
return "RenderPass::kTriangleHulls";
case RenderPass::kTriangleEdges:
return "RenderPass::kTriangleEdges";
case RenderPass::kTriangleCorners:
return "RenderPass::kTriangleCorners";
case RenderPass::kQuadraticHulls:
return "RenderPass::kQuadraticHulls";
case RenderPass::kQuadraticCorners:
return "RenderPass::kQuadraticCorners";
case RenderPass::kSerpentineHulls:
return "RenderPass::kSerpentineHulls";
case RenderPass::kLoopHulls:
return "RenderPass::kLoopHulls";
case RenderPass::kSerpentineCorners:
return "RenderPass::kSerpentineCorners";
case RenderPass::kLoopCorners:
return "RenderPass::kLoopCorners";
}
SK_ABORT("Unexpected GrCCPRCoverageProcessor::RenderPass.");
return nullptr;
}
|
