зеркало из https://github.com/mozilla/moz-skia.git
112 строки
3.5 KiB
C++
112 строки
3.5 KiB
C++
|
|
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
#include "SampleCode.h"
|
|
#include "SkView.h"
|
|
#include "SkCanvas.h"
|
|
#include "SkPath.h"
|
|
#include "SkRandom.h"
|
|
|
|
class HairCurvesView : public SampleView {
|
|
public:
|
|
HairCurvesView() {
|
|
}
|
|
|
|
protected:
|
|
// overrides from SkEventSink
|
|
virtual bool onQuery(SkEvent* evt) {
|
|
if (SampleCode::TitleQ(*evt)) {
|
|
SampleCode::TitleR(evt, "HairCurves");
|
|
return true;
|
|
}
|
|
return this->INHERITED::onQuery(evt);
|
|
}
|
|
|
|
|
|
virtual void onDrawContent(SkCanvas* canvas) {
|
|
SkPaint paint;
|
|
paint.setAntiAlias(true);
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
|
paint.setStrokeWidth(-1);
|
|
canvas->save();
|
|
canvas->scale(1000 * SK_Scalar1, 1000 * SK_Scalar1);
|
|
SkRandom rand;
|
|
SkPath curves;
|
|
SkPath hulls;
|
|
SkPath ctrlPts;
|
|
for (int i = 0; i < 100; ++i) {
|
|
SkScalar pts[] = {
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1()
|
|
};
|
|
curves.moveTo(pts[0], pts[1]);
|
|
curves.cubicTo(pts[2], pts[3],
|
|
pts[4], pts[5],
|
|
pts[6], pts[7]);
|
|
|
|
hulls.moveTo(pts[0], pts[1]);
|
|
hulls.lineTo(pts[2], pts[3]);
|
|
hulls.lineTo(pts[4], pts[5]);
|
|
hulls.lineTo(pts[6], pts[7]);
|
|
|
|
ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[6], pts[7], SK_Scalar1 / 200);
|
|
}
|
|
for (int i = 0; i < 100; ++i) {
|
|
SkScalar pts[] = {
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
};
|
|
curves.moveTo(pts[0], pts[1]);
|
|
curves.quadTo(pts[2], pts[3],
|
|
pts[4], pts[5]);
|
|
|
|
hulls.moveTo(pts[0], pts[1]);
|
|
hulls.lineTo(pts[2], pts[3]);
|
|
hulls.lineTo(pts[4], pts[5]);
|
|
|
|
ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
|
|
}
|
|
for (int i = 0; i < 100; ++i) {
|
|
SkScalar pts[] = {
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
rand.nextUScalar1(), rand.nextUScalar1(),
|
|
};
|
|
curves.moveTo(pts[0], pts[1]);
|
|
curves.lineTo(pts[2], pts[3]);
|
|
|
|
ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
|
|
ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
|
|
}
|
|
|
|
paint.setColor(SK_ColorBLACK);
|
|
canvas->drawPath(curves, paint);
|
|
paint.setColor(SK_ColorRED);
|
|
//canvas->drawPath(hulls, paint);
|
|
paint.setStyle(SkPaint::kFill_Style);
|
|
paint.setColor(SK_ColorBLUE);
|
|
//canvas->drawPath(ctrlPts, paint);
|
|
|
|
canvas->restore();
|
|
}
|
|
|
|
private:
|
|
typedef SampleView INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static SkView* MyFactory() { return new HairCurvesView; }
|
|
static SkViewRegister reg(MyFactory);
|