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 "include/gpu/GrTexture.h"
14 #include "src/gpu/glsl/GrGLSLFragmentProcessor.h"
15 #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
16 #include "src/gpu/glsl/GrGLSLProgramBuilder.h"
17 #include "src/sksl/SkSLCPP.h"
18 #include "src/sksl/SkSLUtil.h"
19 class GrGLSLEllipseEffect : public GrGLSLFragmentProcessor {
20 public:
GrGLSLEllipseEffect()21 GrGLSLEllipseEffect() {}
emitCode(EmitArgs & args)22 void emitCode(EmitArgs& args) override {
23 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
24 const GrEllipseEffect& _outer = args.fFp.cast<GrEllipseEffect>();
25 (void)_outer;
26 auto edgeType = _outer.edgeType;
27 (void)edgeType;
28 auto center = _outer.center;
29 (void)center;
30 auto radii = _outer.radii;
31 (void)radii;
32 prevRadii = float2(-1.0);
33 medPrecision = !sk_Caps.floatIs32Bits;
34 ellipseVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kFloat4_GrSLType,
35 "ellipse");
36 if (medPrecision) {
37 scaleVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kFloat2_GrSLType,
38 "scale");
39 }
40 fragBuilder->codeAppendf(
41 "float2 prevCenter;\nfloat2 prevRadii = float2(%f, %f);\nbool medPrecision = "
42 "%s;\nfloat2 d = sk_FragCoord.xy - %s.xy;\n@if (medPrecision) {\n d *= "
43 "%s.y;\n}\nfloat2 Z = d * %s.zw;\nfloat implicit = dot(Z, d) - 1.0;\nfloat "
44 "grad_dot = 4.0 * dot(Z, Z);\n@if (medPrecision) {\n grad_dot = max(grad_dot, "
45 "6.1036000261083245e-05);\n} else {\n grad_dot = max(grad_dot, "
46 "1.1754999560161448e-38);\n}\nfloat approx_dist = implicit * "
47 "inversesqrt(grad_dot);\n@if (medPrecision) {\n approx_dist *= %s.x;\n}\nhalf "
48 "alph",
49 prevRadii.fX, prevRadii.fY, (medPrecision ? "true" : "false"),
50 args.fUniformHandler->getUniformCStr(ellipseVar),
51 scaleVar.isValid() ? args.fUniformHandler->getUniformCStr(scaleVar) : "float2(0)",
52 args.fUniformHandler->getUniformCStr(ellipseVar),
53 scaleVar.isValid() ? args.fUniformHandler->getUniformCStr(scaleVar) : "float2(0)");
54 fragBuilder->codeAppendf(
55 "a;\n@switch (%d) {\n case 0:\n alpha = approx_dist > 0.0 ? 0.0 : 1.0;\n "
56 " break;\n case 1:\n alpha = clamp(0.5 - half(approx_dist), 0.0, "
57 "1.0);\n break;\n case 2:\n alpha = approx_dist > 0.0 ? 1.0 : "
58 "0.0;\n break;\n case 3:\n alpha = clamp(0.5 + half(approx_dist), "
59 "0.0, 1.0);\n break;\n default:\n discard;\n}\n%s = %s * alpha;\n",
60 (int)_outer.edgeType, args.fOutputColor, args.fInputColor);
61 }
62
63 private:
onSetData(const GrGLSLProgramDataManager & pdman,const GrFragmentProcessor & _proc)64 void onSetData(const GrGLSLProgramDataManager& pdman,
65 const GrFragmentProcessor& _proc) override {
66 const GrEllipseEffect& _outer = _proc.cast<GrEllipseEffect>();
67 auto edgeType = _outer.edgeType;
68 (void)edgeType;
69 auto center = _outer.center;
70 (void)center;
71 auto radii = _outer.radii;
72 (void)radii;
73 UniformHandle& ellipse = ellipseVar;
74 (void)ellipse;
75 UniformHandle& scale = scaleVar;
76 (void)scale;
77
78 if (radii != prevRadii || center != prevCenter) {
79 float invRXSqd;
80 float invRYSqd;
81 // If we're using a scale factor to work around precision issues, choose the larger
82 // radius as the scale factor. The inv radii need to be pre-adjusted by the scale
83 // factor.
84 if (scale.isValid()) {
85 if (radii.fX > radii.fY) {
86 invRXSqd = 1.f;
87 invRYSqd = (radii.fX * radii.fX) / (radii.fY * radii.fY);
88 pdman.set2f(scale, radii.fX, 1.f / radii.fX);
89 } else {
90 invRXSqd = (radii.fY * radii.fY) / (radii.fX * radii.fX);
91 invRYSqd = 1.f;
92 pdman.set2f(scale, radii.fY, 1.f / radii.fY);
93 }
94 } else {
95 invRXSqd = 1.f / (radii.fX * radii.fX);
96 invRYSqd = 1.f / (radii.fY * radii.fY);
97 }
98 pdman.set4f(ellipse, center.fX, center.fY, invRXSqd, invRYSqd);
99 prevCenter = center;
100 prevRadii = radii;
101 }
102 }
103 SkPoint prevCenter = float2(0);
104 SkPoint prevRadii = float2(0);
105 bool medPrecision = false;
106 UniformHandle ellipseVar;
107 UniformHandle scaleVar;
108 };
onCreateGLSLInstance() const109 GrGLSLFragmentProcessor* GrEllipseEffect::onCreateGLSLInstance() const {
110 return new GrGLSLEllipseEffect();
111 }
onGetGLSLProcessorKey(const GrShaderCaps & caps,GrProcessorKeyBuilder * b) const112 void GrEllipseEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
113 GrProcessorKeyBuilder* b) const {
114 b->add32((int32_t)edgeType);
115 }
onIsEqual(const GrFragmentProcessor & other) const116 bool GrEllipseEffect::onIsEqual(const GrFragmentProcessor& other) const {
117 const GrEllipseEffect& that = other.cast<GrEllipseEffect>();
118 (void)that;
119 if (edgeType != that.edgeType) return false;
120 if (center != that.center) return false;
121 if (radii != that.radii) return false;
122 return true;
123 }
GrEllipseEffect(const GrEllipseEffect & src)124 GrEllipseEffect::GrEllipseEffect(const GrEllipseEffect& src)
125 : INHERITED(kGrEllipseEffect_ClassID, src.optimizationFlags())
126 , edgeType(src.edgeType)
127 , center(src.center)
128 , radii(src.radii) {}
clone() const129 std::unique_ptr<GrFragmentProcessor> GrEllipseEffect::clone() const {
130 return std::unique_ptr<GrFragmentProcessor>(new GrEllipseEffect(*this));
131 }
132 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrEllipseEffect);
133 #if GR_TEST_UTILS
TestCreate(GrProcessorTestData * testData)134 std::unique_ptr<GrFragmentProcessor> GrEllipseEffect::TestCreate(GrProcessorTestData* testData) {
135 SkPoint center;
136 center.fX = testData->fRandom->nextRangeScalar(0.f, 1000.f);
137 center.fY = testData->fRandom->nextRangeScalar(0.f, 1000.f);
138 SkScalar rx = testData->fRandom->nextRangeF(0.f, 1000.f);
139 SkScalar ry = testData->fRandom->nextRangeF(0.f, 1000.f);
140 GrClipEdgeType et;
141 do {
142 et = (GrClipEdgeType)testData->fRandom->nextULessThan(kGrClipEdgeTypeCnt);
143 } while (GrClipEdgeType::kHairlineAA == et);
144 return GrEllipseEffect::Make(et, center, SkPoint::Make(rx, ry),
145 *testData->caps()->shaderCaps());
146 }
147 #endif
148