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- /*
- * 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 "include/core/SkCanvas.h"
- #include "include/core/SkPath.h"
- #include "include/utils/SkRandom.h"
- #include "samplecode/Sample.h"
- class HairCurvesView : public Sample {
- public:
- HairCurvesView() {
- }
- protected:
- SkString name() override { return SkString("HairCurves"); }
- void onDrawContent(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setStrokeWidth(0);
- canvas->save();
- canvas->scale(1000 * SK_Scalar1, 1000 * SK_Scalar1);
- SkRandom rand;
- SkRandom randW;
- 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(),
- rand.nextUScalar1(), rand.nextUScalar1(),
- };
- SkScalar weight = randW.nextUScalar1() * 2.0f;
- curves.moveTo(pts[0], pts[1]);
- curves.conicTo(pts[2], pts[3],
- pts[4], pts[5],
- weight);
- 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 Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new HairCurvesView(); )
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