skia2/samplecode/SampleAnimBlur.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

73 lines
2.2 KiB
C++

/*
* 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"
#include "tools/timer/AnimTimer.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 {
public:
AnimBlurView() : fBlurSigma(0), fCircleRadius(100) {}
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "AnimBlur");
return true;
}
return this->INHERITED::onQuery(evt);
}
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(const AnimTimer& timer) override {
fBlurSigma = get_anim_sin(timer.secs(), 100, 4, 5);
fCircleRadius = 3 + get_anim_sin(timer.secs(), 150, 25, 3);
return true;
}
private:
SkScalar fBlurSigma, fCircleRadius;
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new AnimBlurView(); )