Skia Fiddle

Options

Width Height

check_box_outline_blank check_box Text Only [Use SkDebugf()]

check_box_outline_blank check_box sRGB

check_box_outline_blank check_box F16

check_box_outline_blank check_box Animation

check_box_outline_blank check_box Offscreen Render Target

Width Height Sample Count

check_box_outline_blank check_box Texturable

check_box_outline_blank check_box MipMap

This global is now defined:

GrBackendRenderTarget backEndRenderTarget;

GrBackendTexture backEndTextureRenderTarget;

Optional source image

check_box_outline_blank check_box MipMap

These globals are now defined:

SkBitmap source;
sk_sp<SkImage> image;
GrBackendTexture backEndTexture; // GPU Only.

Note:

Adding comments with SK_FOLD_START and SK_FOLD_END creates foldable code blocks.
These blocks will be folded by default and are useful for highlighting specific lines of code.
You can also use the keyboard shortcuts Ctrl+S and Ctrl+E in the code editor to set them.

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void draw(SkCanvas* canvas) {
    auto addPoly = [](int sides, SkScalar size, SkPath* path) -> void {
        path->moveTo(size, 0);
        for (int i = 1; i < sides; i++) {
            SkScalar rad = SK_ScalarPI * 2 * i / sides;
            path->lineTo(SkScalarCos(rad) * size, SkScalarSin(rad) * size);
        }
        path->close();
    };
    SkPath path;
    path.incReserve(3 + 4 + 5 + 6 + 7 + 8 + 9);
    for (int sides = 3; sides < 10; ++sides) {
       addPoly(sides, sides, &path);
    }
    SkMatrix matrix;
    matrix.setScale(10, 10, -10, -10);
    path.transform(matrix);
    SkPaint paint;
    paint.setStyle(SkPaint::kStroke_Style);
    canvas->drawPath(path, paint);
}