62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
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/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkBlurTypes.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColorPriv.h"
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#include "include/core/SkMaskFilter.h"
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#include "src/base/SkRandom.h"
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#include "tools/viewer/Slide.h"
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#include <iterator>
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SkScalar get_anim_sin(double secs, SkScalar amplitude, SkScalar periodInSec, SkScalar phaseInSec) {
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if (!periodInSec) {
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return 0;
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}
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double t = secs + phaseInSec;
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t *= SkScalarToFloat(2 * SK_ScalarPI) / periodInSec;
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amplitude = SK_ScalarHalf * amplitude;
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return amplitude * SkDoubleToScalar(sin(t)) + amplitude;
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}
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class AnimBlurSlide : public Slide {
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SkScalar fBlurSigma = 0;
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SkScalar fCircleRadius = 100;
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public:
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AnimBlurSlide() { fName ="AnimBlur"; }
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void draw(SkCanvas* canvas) override {
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static const SkBlurStyle gStyles[] = {
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kNormal_SkBlurStyle,
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kInner_SkBlurStyle,
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kSolid_SkBlurStyle,
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kOuter_SkBlurStyle,
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};
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SkRandom random;
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for (size_t i = 0; i < std::size(gStyles); ++i) {
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SkPaint paint;
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paint.setMaskFilter(SkMaskFilter::MakeBlur(gStyles[i],
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fBlurSigma));
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paint.setColor(random.nextU() | 0xff000000);
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canvas->drawCircle(200 * SK_Scalar1 + 400 * (i % 2) * SK_Scalar1,
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200 * SK_Scalar1 + i / 2 * 400 * SK_Scalar1,
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fCircleRadius, paint);
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}
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}
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bool animate(double nanos) override {
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fBlurSigma = get_anim_sin(1e-9 * nanos, 100, 4, 5);
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fCircleRadius = 3 + get_anim_sin(1e-9 * nanos, 150, 25, 3);
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return true;
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}
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};
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DEF_SLIDE( return new AnimBlurSlide(); )
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