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/*
* Copyright 2013 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/SkPath.h"
#include "samplecode/Sample.h"
// Reproduces https://code.google.com/p/chromium/issues/detail?id=279014
// Renders a string art shape.
// The particular shape rendered can be controlled by clicking horizontally, thereby
// generating an angle from 0 to 1.
class StringArtView : public Sample {
public:
StringArtView() : fAngle(0.305f) {}
protected:
SkString name() override { return SkString("StringArt"); }
void onDrawContent(SkCanvas* canvas) override {
SkScalar angle = fAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
SkPoint center = SkPoint::Make(SkScalarHalf(this->width()), SkScalarHalf(this->height()));
SkScalar length = 5;
SkScalar step = angle;
SkPath path;
path.moveTo(center);
while (length < (SkScalarHalf(std::min(this->width(), this->height())) - 10.f))
{
SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
length*SkScalarSin(step) + center.fY);
path.lineTo(rp);
length += angle / SkScalarHalf(SK_ScalarPI);
step += angle;
}
path.close();
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFF007700);
canvas->drawPath(path, paint);
}
Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey) override {
fAngle = x/width();
return nullptr;
}
private:
SkScalar fAngle;
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new StringArtView(); )
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