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/*
* 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"
#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
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