cd5104e942
Change-Id: I700b7c0461475062ac66712cc29070f150cf777d Reviewed-on: https://skia-review.googlesource.com/c/skia/+/202315 Commit-Queue: Mike Klein <mtklein@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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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 "AnimTimer.h"
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#include "Sample.h"
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#include "SkCanvas.h"
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#include "SkColorPriv.h"
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#include "SkMaskFilter.h"
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#include "SkRandom.h"
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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 AnimBlurView : public Sample {
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public:
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AnimBlurView() : fBlurSigma(0), fCircleRadius(100) {}
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protected:
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bool onQuery(Sample::Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "AnimBlur");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void onDrawContent(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 < SK_ARRAY_COUNT(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 onAnimate(const AnimTimer& timer) override {
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fBlurSigma = get_anim_sin(timer.secs(), 100, 4, 5);
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fCircleRadius = 3 + get_anim_sin(timer.secs(), 150, 25, 3);
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return true;
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}
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private:
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SkScalar fBlurSigma, fCircleRadius;
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new AnimBlurView(); )
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