export default function ratio(ctx: any) {
    const dpr = window.devicePixelRatio || 1;
    const bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
    return 2;
    //return dpr / bsr;
}