feat(CanvasContext): Added optional devicePixelRatio argument to resize

It's mainly useful in context of rendering in web worker,
because web worker doesn't have access to devicePixelRatio,
so resize code will be split between
1. main thread asking for a render, providing devicePixelRatio
2. Worker rendering and resizing CanvasContext w/ provided ratio
3. Worker giving back main thread the resize target
4. Main thread applying css width/height provided by the worker

Author: saitonakamura

src/canvascontext.ts

@@ -169,19 +169,19 @@ export class CanvasContext extends RenderContext {
     return this;
   }
 
-  resize(width: number, height: number): this {
+  resize(width: number, height: number, devicePixelRatio?: number): this {
     const canvas = this.context2D.canvas;
-    const devicePixelRatio = globalObject().devicePixelRatio || 1;
+    const dpr: number = devicePixelRatio ?? globalObject().devicePixelRatio ?? 1;
 
     // Scale the canvas size by the device pixel ratio clamping to the maximum supported size.
-    [width, height] = CanvasContext.sanitizeCanvasDims(width * devicePixelRatio, height * devicePixelRatio);
+    [width, height] = CanvasContext.sanitizeCanvasDims(width * dpr, height * dpr);
 
     // Divide back down by the pixel ratio and convert to integers.
-    width = (width / devicePixelRatio) | 0;
-    height = (height / devicePixelRatio) | 0;
+    width = (width / dpr) | 0;
+    height = (height / dpr) | 0;
 
-    canvas.width = width * devicePixelRatio;
-    canvas.height = height * devicePixelRatio;
+    canvas.width = width * dpr;
+    canvas.height = height * dpr;
 
     // The canvas could be an instance of either HTMLCanvasElement or an OffscreenCanvas.
     // Only HTMLCanvasElement has a style attribute.
@@ -190,7 +190,7 @@ export class CanvasContext extends RenderContext {
       canvas.style.height = height + 'px';
     }
 
-    return this.scale(devicePixelRatio, devicePixelRatio);
+    return this.scale(dpr, dpr);
   }
 
   rect(x: number, y: number, width: number, height: number): this {