xref: /external/skia/src/gpu/effects/GrCircleEffect.cpp

/*
 * 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/GrGLSLColorSpaceXformHelper.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLProgramBuilder.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;
prevRadius = -1.0;
        fCircleVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kVec4f_GrSLType, kDefault_GrSLPrecision, "circle");
        fragBuilder->codeAppendf("vec2 prevCenter;\nfloat prevRadius = %f;\nfloat d;\nif (%d == 2 || %d == 3) {\n    d = (length((%s.xy - sk_FragCoord.xy) * %s.w) - 1.0) * %s.z;\n} else {\n    d = (1.0 - length((%s.xy - sk_FragCoord.xy) * %s.w)) * %s.z;\n}\nif ((%d == 1 || %d == 3) || %d == 4) {\n    d = clamp(d, 0.0, 1.0);\n} else {\n    d = d > 0.5 ? 1.0 : 0.0;\n}\n%s = %s * d;\n", prevRadius, _outer.edgeType(), _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), _outer.edgeType(), _outer.edgeType(), _outer.edgeType(), args.fOutputColor, args.fInputColor ? args.fInputColor : "vec4(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((GrPrimitiveEdgeType) edgeType)) {
            effectiveRadius -= 0.5f;
        } else {
            effectiveRadius += 0.5f;
        }
        pdman.set4f(circle, center.fX, center.fY, effectiveRadius,
                    SkScalarInvert(effectiveRadius));
        prevCenter = center;
        prevRadius = radius;
    }
    }
SkPoint prevCenter;
float prevRadius;
    UniformHandle fCircleVar;
};
GrGLSLFragmentProcessor* GrCircleEffect::onCreateGLSLInstance() const {
    return new GrGLSLCircleEffect();
}
void GrCircleEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const {
    b->add32(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;
}
GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrCircleEffect);
#if GR_TEST_UTILS
sk_sp<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(0.f, 1000.f);
    GrPrimitiveEdgeType et;
    do {
        et = (GrPrimitiveEdgeType) testData->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt);
    } while (kHairlineAA_GrProcessorEdgeType == et);
    return GrCircleEffect::Make(et, center, radius);
}
#endif
#endif