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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkMaskFilter.h"
#include "include/utils/SkRandom.h"
#include "samplecode/Sample.h"
SkScalar get_anim_sin(double secs, SkScalar amplitude, SkScalar periodInSec, SkScalar phaseInSec) {
if (!periodInSec) {
return 0;
}
double t = secs + phaseInSec;
t *= SkScalarToFloat(2 * SK_ScalarPI) / periodInSec;
amplitude = SK_ScalarHalf * amplitude;
return amplitude * SkDoubleToScalar(sin(t)) + amplitude;
}
class AnimBlurView : public Sample {
SkScalar fBlurSigma = 0;
SkScalar fCircleRadius = 100;
SkString name() override { return SkString("AnimBlur"); }
void onDrawContent(SkCanvas* canvas) override {
static const SkBlurStyle gStyles[] = {
kNormal_SkBlurStyle,
kInner_SkBlurStyle,
kSolid_SkBlurStyle,
kOuter_SkBlurStyle,
};
SkRandom random;
for (size_t i = 0; i < SK_ARRAY_COUNT(gStyles); ++i) {
SkPaint paint;
paint.setMaskFilter(SkMaskFilter::MakeBlur(gStyles[i],
fBlurSigma));
paint.setColor(random.nextU() | 0xff000000);
canvas->drawCircle(200 * SK_Scalar1 + 400 * (i % 2) * SK_Scalar1,
200 * SK_Scalar1 + i / 2 * 400 * SK_Scalar1,
fCircleRadius, paint);
}
}
bool onAnimate(double nanos) override {
fBlurSigma = get_anim_sin(1e-9 * nanos, 100, 4, 5);
fCircleRadius = 3 + get_anim_sin(1e-9 * nanos, 150, 25, 3);
return true;
}
};
DEF_SAMPLE( return new AnimBlurView(); )
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