| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| /* |
| * This file was autogenerated from GrCircleEffect.fp; do not modify. |
| */ |
| #include "GrCircleEffect.h" |
| #if SK_SUPPORT_GPU |
| #include "glsl/GrGLSLFragmentProcessor.h" |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "glsl/GrGLSLProgramBuilder.h" |
| #include "GrTexture.h" |
| #include "SkSLCPP.h" |
| #include "SkSLUtil.h" |
| class GrGLSLCircleEffect : public GrGLSLFragmentProcessor { |
| public: |
| GrGLSLCircleEffect() {} |
| void emitCode(EmitArgs& args) override { |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| const GrCircleEffect& _outer = args.fFp.cast<GrCircleEffect>(); |
| (void)_outer; |
| auto edgeType = _outer.edgeType(); |
| (void)edgeType; |
| auto center = _outer.center(); |
| (void)center; |
| auto radius = _outer.radius(); |
| (void)radius; |
| prevRadius = -1.0; |
| fCircleVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4_GrSLType, |
| kDefault_GrSLPrecision, "circle"); |
| fragBuilder->codeAppendf( |
| "half2 prevCenter;\nhalf prevRadius = %f;\nhalf d;\n@if (%d == 2 || %d == 3) {\n " |
| " d = (float(length((%s.xy - half2(sk_FragCoord.xy)) * %s.w)) - 1.0) * %s.z;\n} " |
| "else {\n d = half((1.0 - float(length((%s.xy - half2(sk_FragCoord.xy)) * " |
| "%s.w))) * float(%s.z));\n}\n@if ((%d == 1 || %d == 3) || %d == 4) {\n d = " |
| "half(clamp(float(d), 0.0, 1.0));\n} else {\n d = half(float(d) > 0.5 ? 1.0 : " |
| "0.0);\n}\n%s = %s * d;\n", |
| prevRadius, (int)_outer.edgeType(), (int)_outer.edgeType(), |
| args.fUniformHandler->getUniformCStr(fCircleVar), |
| args.fUniformHandler->getUniformCStr(fCircleVar), |
| args.fUniformHandler->getUniformCStr(fCircleVar), |
| args.fUniformHandler->getUniformCStr(fCircleVar), |
| args.fUniformHandler->getUniformCStr(fCircleVar), |
| args.fUniformHandler->getUniformCStr(fCircleVar), (int)_outer.edgeType(), |
| (int)_outer.edgeType(), (int)_outer.edgeType(), args.fOutputColor, |
| args.fInputColor ? args.fInputColor : "half4(1)"); |
| } |
| |
| private: |
| void onSetData(const GrGLSLProgramDataManager& pdman, |
| const GrFragmentProcessor& _proc) override { |
| const GrCircleEffect& _outer = _proc.cast<GrCircleEffect>(); |
| auto edgeType = _outer.edgeType(); |
| (void)edgeType; |
| auto center = _outer.center(); |
| (void)center; |
| auto radius = _outer.radius(); |
| (void)radius; |
| UniformHandle& circle = fCircleVar; |
| (void)circle; |
| |
| if (radius != prevRadius || center != prevCenter) { |
| SkScalar effectiveRadius = radius; |
| if (GrProcessorEdgeTypeIsInverseFill((GrClipEdgeType)edgeType)) { |
| effectiveRadius -= 0.5f; |
| // When the radius is 0.5 effectiveRadius is 0 which causes an inf * 0 in the |
| // shader. |
| effectiveRadius = SkTMax(0.001f, effectiveRadius); |
| } else { |
| effectiveRadius += 0.5f; |
| } |
| pdman.set4f(circle, center.fX, center.fY, effectiveRadius, |
| SkScalarInvert(effectiveRadius)); |
| prevCenter = center; |
| prevRadius = radius; |
| } |
| } |
| SkPoint prevCenter = half2(0); |
| float prevRadius = 0; |
| UniformHandle fCircleVar; |
| }; |
| GrGLSLFragmentProcessor* GrCircleEffect::onCreateGLSLInstance() const { |
| return new GrGLSLCircleEffect(); |
| } |
| void GrCircleEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps, |
| GrProcessorKeyBuilder* b) const { |
| b->add32((int32_t)fEdgeType); |
| } |
| bool GrCircleEffect::onIsEqual(const GrFragmentProcessor& other) const { |
| const GrCircleEffect& that = other.cast<GrCircleEffect>(); |
| (void)that; |
| if (fEdgeType != that.fEdgeType) return false; |
| if (fCenter != that.fCenter) return false; |
| if (fRadius != that.fRadius) return false; |
| return true; |
| } |
| GrCircleEffect::GrCircleEffect(const GrCircleEffect& src) |
| : INHERITED(kGrCircleEffect_ClassID, src.optimizationFlags()) |
| , fEdgeType(src.fEdgeType) |
| , fCenter(src.fCenter) |
| , fRadius(src.fRadius) {} |
| std::unique_ptr<GrFragmentProcessor> GrCircleEffect::clone() const { |
| return std::unique_ptr<GrFragmentProcessor>(new GrCircleEffect(*this)); |
| } |
| GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrCircleEffect); |
| #if GR_TEST_UTILS |
| std::unique_ptr<GrFragmentProcessor> GrCircleEffect::TestCreate(GrProcessorTestData* testData) { |
| SkPoint center; |
| center.fX = testData->fRandom->nextRangeScalar(0.f, 1000.f); |
| center.fY = testData->fRandom->nextRangeScalar(0.f, 1000.f); |
| SkScalar radius = testData->fRandom->nextRangeF(1.f, 1000.f); |
| GrClipEdgeType et; |
| do { |
| et = (GrClipEdgeType)testData->fRandom->nextULessThan(kGrClipEdgeTypeCnt); |
| } while (GrClipEdgeType::kHairlineAA == et); |
| return GrCircleEffect::Make(et, center, radius); |
| } |
| #endif |
| #endif |