docs/examples/skcanvas_star.cpp

// Copyright 2020 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
REG_FIDDLE(skcanvas_star, 256, 256, false, 0) {
void draw(SkCanvas* canvas) {
    const SkScalar scale = 256.0f;
    const SkScalar R = 0.45f * scale;
    const SkScalar TAU = 6.2831853f;
    SkPathBuilder path;
    path.moveTo(R, 0.0f);
    for (int i = 1; i < 7; ++i) {
        SkScalar theta = 3 * i * TAU / 7;
        path.lineTo(R * cos(theta), R * sin(theta));
    }
    path.close();
    SkPaint p;
    p.setAntiAlias(true);
    canvas->clear(SK_ColorWHITE);
    canvas->translate(0.5f * scale, 0.5f * scale);
    canvas->drawPath(path.detach(), p);
}
}  // END FIDDLE