skia2/docs/examples/skpaint_path_2d_path_effect.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(skpaint_path_2d_path_effect, 256, 256, false, 0) {
void draw(SkCanvas* canvas) {
    SkScalar scale = 10.0f;
    SkPath path;
    static const int8_t pts[] = {2, 2, 1, 3, 0, 3, 2, 1, 3, 1, 4, 0, 4, 1,
                                 5, 1, 4, 2, 4, 3, 2, 5, 2, 4, 3, 3, 2, 3};
    path.moveTo(2 * scale, 3 * scale);
    for (size_t i = 0; i < sizeof(pts) / sizeof(pts[0]); i += 2) {
        path.lineTo(pts[i] * scale, pts[i + 1] * scale);
    }
    path.close();
    SkMatrix matrix = SkMatrix::Scale(4 * scale, 4 * scale);
    SkPaint paint;
    paint.setPathEffect(SkPath2DPathEffect::Make(matrix, path));
    paint.setAntiAlias(true);
    canvas->clear(SK_ColorWHITE);
    SkRect bounds{-4 * scale, -4 * scale, 256, 256};
    canvas->drawRect(bounds, paint);
}
}  // END FIDDLE