41248071ac
gm, slides, and samples no longer need to know about the implementation
details of AnimTimer.
This
virtual bool onAnimate(const AnimTimer&);
becomes this:
virtual bool onAnimate(double /*nanoseconds*/);
which is much easier to reason about.
AnimTimer itself is now part of viewer.
Change-Id: Ib70bf7a0798b1991f25204ae84f70463cdbeb358
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/226838
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
66 lines
2.0 KiB
C++
66 lines
2.0 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 "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 "include/utils/SkRandom.h"
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#include "samplecode/Sample.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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SkString name() override { return SkString("AnimBlur"); }
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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(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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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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