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 GrCircleEffect.fp; do not modify.
10 **************************************************************************************************/
11#include "GrCircleEffect.h"
12#if SK_SUPPORT_GPU
13#include "glsl/GrGLSLFragmentProcessor.h"
14#include "glsl/GrGLSLFragmentShaderBuilder.h"
15#include "glsl/GrGLSLProgramBuilder.h"
16#include "GrTexture.h"
17#include "SkSLCPP.h"
18#include "SkSLUtil.h"
19class GrGLSLCircleEffect : public GrGLSLFragmentProcessor {
20public:
21    GrGLSLCircleEffect() {}
22    void emitCode(EmitArgs& args) override {
23        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
24        const GrCircleEffect& _outer = args.fFp.cast<GrCircleEffect>();
25        (void)_outer;
26        auto edgeType = _outer.edgeType();
27        (void)edgeType;
28        auto center = _outer.center();
29        (void)center;
30        auto radius = _outer.radius();
31        (void)radius;
32        prevRadius = -1.0;
33        fCircleVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4_GrSLType,
34                                                      kDefault_GrSLPrecision, "circle");
35        fragBuilder->codeAppendf(
36                "half2 prevCenter;\nhalf prevRadius = %f;\nhalf d;\n@if (%d == 2 || %d == 3) {\n   "
37                " d = (float(length((%s.xy - half2(sk_FragCoord.xy)) * %s.w)) - 1.0) * %s.z;\n} "
38                "else {\n    d = half((1.0 - float(length((%s.xy - half2(sk_FragCoord.xy)) * "
39                "%s.w))) * float(%s.z));\n}\n@if ((%d == 1 || %d == 3) || %d == 4) {\n    d = "
40                "half(clamp(float(d), 0.0, 1.0));\n} else {\n    d = half(float(d) > 0.5 ? 1.0 : "
41                "0.0);\n}\n%s = %s * d;\n",
42                prevRadius, (int)_outer.edgeType(), (int)_outer.edgeType(),
43                args.fUniformHandler->getUniformCStr(fCircleVar),
44                args.fUniformHandler->getUniformCStr(fCircleVar),
45                args.fUniformHandler->getUniformCStr(fCircleVar),
46                args.fUniformHandler->getUniformCStr(fCircleVar),
47                args.fUniformHandler->getUniformCStr(fCircleVar),
48                args.fUniformHandler->getUniformCStr(fCircleVar), (int)_outer.edgeType(),
49                (int)_outer.edgeType(), (int)_outer.edgeType(), args.fOutputColor,
50                args.fInputColor ? args.fInputColor : "half4(1)");
51    }
52
53private:
54    void onSetData(const GrGLSLProgramDataManager& pdman,
55                   const GrFragmentProcessor& _proc) override {
56        const GrCircleEffect& _outer = _proc.cast<GrCircleEffect>();
57        auto edgeType = _outer.edgeType();
58        (void)edgeType;
59        auto center = _outer.center();
60        (void)center;
61        auto radius = _outer.radius();
62        (void)radius;
63        UniformHandle& circle = fCircleVar;
64        (void)circle;
65
66        if (radius != prevRadius || center != prevCenter) {
67            SkScalar effectiveRadius = radius;
68            if (GrProcessorEdgeTypeIsInverseFill((GrClipEdgeType)edgeType)) {
69                effectiveRadius -= 0.5f;
70                // When the radius is 0.5 effectiveRadius is 0 which causes an inf * 0 in the
71                // shader.
72                effectiveRadius = SkTMax(0.001f, effectiveRadius);
73            } else {
74                effectiveRadius += 0.5f;
75            }
76            pdman.set4f(circle, center.fX, center.fY, effectiveRadius,
77                        SkScalarInvert(effectiveRadius));
78            prevCenter = center;
79            prevRadius = radius;
80        }
81    }
82    SkPoint prevCenter = half2(0);
83    float prevRadius = 0;
84    UniformHandle fCircleVar;
85};
86GrGLSLFragmentProcessor* GrCircleEffect::onCreateGLSLInstance() const {
87    return new GrGLSLCircleEffect();
88}
89void GrCircleEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
90                                           GrProcessorKeyBuilder* b) const {
91    b->add32((int32_t)fEdgeType);
92}
93bool GrCircleEffect::onIsEqual(const GrFragmentProcessor& other) const {
94    const GrCircleEffect& that = other.cast<GrCircleEffect>();
95    (void)that;
96    if (fEdgeType != that.fEdgeType) return false;
97    if (fCenter != that.fCenter) return false;
98    if (fRadius != that.fRadius) return false;
99    return true;
100}
101GrCircleEffect::GrCircleEffect(const GrCircleEffect& src)
102        : INHERITED(kGrCircleEffect_ClassID, src.optimizationFlags())
103        , fEdgeType(src.fEdgeType)
104        , fCenter(src.fCenter)
105        , fRadius(src.fRadius) {}
106std::unique_ptr<GrFragmentProcessor> GrCircleEffect::clone() const {
107    return std::unique_ptr<GrFragmentProcessor>(new GrCircleEffect(*this));
108}
109GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrCircleEffect);
110#if GR_TEST_UTILS
111std::unique_ptr<GrFragmentProcessor> GrCircleEffect::TestCreate(GrProcessorTestData* testData) {
112    SkPoint center;
113    center.fX = testData->fRandom->nextRangeScalar(0.f, 1000.f);
114    center.fY = testData->fRandom->nextRangeScalar(0.f, 1000.f);
115    SkScalar radius = testData->fRandom->nextRangeF(1.f, 1000.f);
116    GrClipEdgeType et;
117    do {
118        et = (GrClipEdgeType)testData->fRandom->nextULessThan(kGrClipEdgeTypeCnt);
119    } while (GrClipEdgeType::kHairlineAA == et);
120    return GrCircleEffect::Make(et, center, radius);
121}
122#endif
123#endif
124