1/*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8/**************************************************************************************************
9 *** This file was autogenerated from GrEllipseEffect.fp; do not modify.
10 **************************************************************************************************/
11#include "GrEllipseEffect.h"
12
13#include "src/core/SkUtils.h"
14#include "src/gpu/GrTexture.h"
15#include "src/gpu/glsl/GrGLSLFragmentProcessor.h"
16#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
17#include "src/gpu/glsl/GrGLSLProgramBuilder.h"
18#include "src/sksl/SkSLCPP.h"
19#include "src/sksl/SkSLUtil.h"
20class GrGLSLEllipseEffect : public GrGLSLFragmentProcessor {
21public:
22 GrGLSLEllipseEffect() {}
23 void emitCode(EmitArgs& args) override {
24 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
25 const GrEllipseEffect& _outer = args.fFp.cast<GrEllipseEffect>();
26 (void)_outer;
27 auto edgeType = _outer.edgeType;
28 (void)edgeType;
29 auto center = _outer.center;
30 (void)center;
31 auto radii = _outer.radii;
32 (void)radii;
33 prevRadii = float2(-1.0);
34 medPrecision = !sk_Caps.floatIs32Bits;
35 ellipseVar = args.fUniformHandler->addUniform(&_outer, kFragment_GrShaderFlag,
36 kFloat4_GrSLType, "ellipse");
37 if (medPrecision) {
38 scaleVar = args.fUniformHandler->addUniform(&_outer, kFragment_GrShaderFlag,
39 kFloat2_GrSLType, "scale");
40 }
41 fragBuilder->codeAppendf(
42 R"SkSL(float2 prevCenter;
43float2 prevRadii = float2(%f, %f);
44bool medPrecision = %s;
45float2 d = sk_FragCoord.xy - %s.xy;
46@if (medPrecision) {
47 d *= %s.y;
48}
49float2 Z = d * %s.zw;
50float implicit = dot(Z, d) - 1.0;
51float grad_dot = 4.0 * dot(Z, Z);
52@if (medPrecision) {
53 grad_dot = max(grad_dot, 6.1036000261083245e-05);
54} else {
55 grad_dot = max(grad_dot, 1.1754999560161448e-38);
56}
57float approx_dist = implicit * inversesqrt(grad_dot);
58@if (medPrecision) {
59 approx_dist *= %s.x;
60}
61half alpha;
62@switch (%d) {
63 case 0:
64 alpha = approx_dist > 0.0 ? 0.0 : 1.0;
65 break;
66 case 1:
67 alpha = clamp(0.5 - half(approx_dist), 0.0, 1.0);
68 break;
69 case 2:
70 alpha = approx_dist > 0.0 ? 1.0 : 0.0;
71 break;
72 case 3:
73 alpha = clamp(0.5 + half(approx_dist), 0.0, 1.0);
74 break;
75 default:
76 discard;
77})SkSL",
78 prevRadii.fX, prevRadii.fY, (medPrecision ? "true" : "false"),
79 args.fUniformHandler->getUniformCStr(ellipseVar),
80 scaleVar.isValid() ? args.fUniformHandler->getUniformCStr(scaleVar) : "float2(0)",
81 args.fUniformHandler->getUniformCStr(ellipseVar),
82 scaleVar.isValid() ? args.fUniformHandler->getUniformCStr(scaleVar) : "float2(0)",
83 (int)_outer.edgeType);
84 SkString _sample4481 = this->invokeChild(0, args);
85 fragBuilder->codeAppendf(
86 R"SkSL(
87half4 inputColor = %s;
88%s = inputColor * alpha;
89)SkSL",
90 _sample4481.c_str(), args.fOutputColor);
91 }
92
93private:
94 void onSetData(const GrGLSLProgramDataManager& pdman,
95 const GrFragmentProcessor& _proc) override {
96 const GrEllipseEffect& _outer = _proc.cast<GrEllipseEffect>();
97 auto edgeType = _outer.edgeType;
98 (void)edgeType;
99 auto center = _outer.center;
100 (void)center;
101 auto radii = _outer.radii;
102 (void)radii;
103 UniformHandle& ellipse = ellipseVar;
104 (void)ellipse;
105 UniformHandle& scale = scaleVar;
106 (void)scale;
107
108 if (radii != prevRadii || center != prevCenter) {
109 float invRXSqd;
110 float invRYSqd;
111 // If we're using a scale factor to work around precision issues, choose the larger
112 // radius as the scale factor. The inv radii need to be pre-adjusted by the scale
113 // factor.
114 if (scale.isValid()) {
115 if (radii.fX > radii.fY) {
116 invRXSqd = 1.f;
117 invRYSqd = (radii.fX * radii.fX) / (radii.fY * radii.fY);
118 pdman.set2f(scale, radii.fX, 1.f / radii.fX);
119 } else {
120 invRXSqd = (radii.fY * radii.fY) / (radii.fX * radii.fX);
121 invRYSqd = 1.f;
122 pdman.set2f(scale, radii.fY, 1.f / radii.fY);
123 }
124 } else {
125 invRXSqd = 1.f / (radii.fX * radii.fX);
126 invRYSqd = 1.f / (radii.fY * radii.fY);
127 }
128 pdman.set4f(ellipse, center.fX, center.fY, invRXSqd, invRYSqd);
129 prevCenter = center;
130 prevRadii = radii;
131 }
132 }
133 SkPoint prevCenter = float2(0);
134 SkPoint prevRadii = float2(0);
135 bool medPrecision = false;
136 UniformHandle ellipseVar;
137 UniformHandle scaleVar;
138};
139GrGLSLFragmentProcessor* GrEllipseEffect::onCreateGLSLInstance() const {
140 return new GrGLSLEllipseEffect();
141}
142void GrEllipseEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
143 GrProcessorKeyBuilder* b) const {
144 b->add32((uint32_t)edgeType);
145}
146bool GrEllipseEffect::onIsEqual(const GrFragmentProcessor& other) const {
147 const GrEllipseEffect& that = other.cast<GrEllipseEffect>();
148 (void)that;
149 if (edgeType != that.edgeType) return false;
150 if (center != that.center) return false;
151 if (radii != that.radii) return false;
152 return true;
153}
154GrEllipseEffect::GrEllipseEffect(const GrEllipseEffect& src)
155 : INHERITED(kGrEllipseEffect_ClassID, src.optimizationFlags())
156 , edgeType(src.edgeType)
157 , center(src.center)
158 , radii(src.radii) {
159 this->cloneAndRegisterAllChildProcessors(src);
160}
161std::unique_ptr<GrFragmentProcessor> GrEllipseEffect::clone() const {
162 return std::make_unique<GrEllipseEffect>(*this);
163}
164#if GR_TEST_UTILS
165SkString GrEllipseEffect::onDumpInfo() const {
166 return SkStringPrintf("(edgeType=%d, center=float2(%f, %f), radii=float2(%f, %f))",
167 (int)edgeType, center.fX, center.fY, radii.fX, radii.fY);
168}
169#endif
170GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrEllipseEffect);
171#if GR_TEST_UTILS
172std::unique_ptr<GrFragmentProcessor> GrEllipseEffect::TestCreate(GrProcessorTestData* testData) {
173 SkPoint center;
174 center.fX = testData->fRandom->nextRangeScalar(0.f, 1000.f);
175 center.fY = testData->fRandom->nextRangeScalar(0.f, 1000.f);
176 SkScalar rx = testData->fRandom->nextRangeF(0.f, 1000.f);
177 SkScalar ry = testData->fRandom->nextRangeF(0.f, 1000.f);
178 bool success;
179 std::unique_ptr<GrFragmentProcessor> fp = testData->inputFP();
180 do {
181 GrClipEdgeType et = (GrClipEdgeType)testData->fRandom->nextULessThan(kGrClipEdgeTypeCnt);
182 std::tie(success, fp) = GrEllipseEffect::Make(
183 std::move(fp), et, center, SkPoint::Make(rx, ry), *testData->caps()->shaderCaps());
184 } while (!success);
185 return fp;
186}
187#endif
188