113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
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/*
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* Copyright 2011 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 "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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class HairCurvesView : public SampleView {
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public:
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HairCurvesView() {
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "HairCurves");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(-1);
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canvas->save();
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canvas->scale(1000 * SK_Scalar1, 1000 * SK_Scalar1);
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SkRandom rand;
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SkPath curves;
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SkPath hulls;
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SkPath ctrlPts;
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1()
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};
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curves.moveTo(pts[0], pts[1]);
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curves.cubicTo(pts[2], pts[3],
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pts[4], pts[5],
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pts[6], pts[7]);
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hulls.moveTo(pts[0], pts[1]);
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hulls.lineTo(pts[2], pts[3]);
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hulls.lineTo(pts[4], pts[5]);
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hulls.lineTo(pts[6], pts[7]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[6], pts[7], SK_Scalar1 / 200);
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}
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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};
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curves.moveTo(pts[0], pts[1]);
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curves.quadTo(pts[2], pts[3],
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pts[4], pts[5]);
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hulls.moveTo(pts[0], pts[1]);
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hulls.lineTo(pts[2], pts[3]);
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hulls.lineTo(pts[4], pts[5]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[4], pts[5], SK_Scalar1 / 200);
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}
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for (int i = 0; i < 100; ++i) {
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SkScalar pts[] = {
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rand.nextUScalar1(), rand.nextUScalar1(),
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rand.nextUScalar1(), rand.nextUScalar1(),
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};
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curves.moveTo(pts[0], pts[1]);
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curves.lineTo(pts[2], pts[3]);
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ctrlPts.addCircle(pts[0], pts[1], SK_Scalar1 / 200);
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ctrlPts.addCircle(pts[2], pts[3], SK_Scalar1 / 200);
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}
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paint.setColor(SK_ColorBLACK);
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canvas->drawPath(curves, paint);
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paint.setColor(SK_ColorRED);
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//canvas->drawPath(hulls, paint);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setColor(SK_ColorBLUE);
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//canvas->drawPath(ctrlPts, paint);
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canvas->restore();
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new HairCurvesView; }
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static SkViewRegister reg(MyFactory);
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