docs: public Canvas toCanvas(Graphics gfx, Align align, int fillColor) {
      float pad = 1/gfx.scale().factor;
      Canvas canvas = gfx.createCanvas(bounds.width()+2*pad, bounds.height()+2*pad);
      canvas.setFillColor(fillColor);
      fill(canvas, align, pad, pad);
      return canvas;
    }