skia2/docs/examples/skcanvas_star.cpp

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// 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;
SkPath 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, p);
}
} // END FIDDLE