fix: 优化 save 的调用次数

src/core/render/item.ts

@@ -269,9 +269,7 @@ export abstract class RenderItem<E extends ERenderItemEvent = ERenderItemEvent>
             if (this.cacheDirty) {
                 const { canvas } = this.cache;
                 ctx.clearRect(0, 0, canvas.width, canvas.height);
-                ctx.save();
                 this.render(this.cache, tran);
-                ctx.restore();
                 this.cacheDirty = false;
             }
 

src/core/render/preset/animate.ts

@@ -103,18 +103,15 @@ export class Animate extends Sprite {
         super('absolute', false, true);
 
         this.setRenderFn((canvas, transform) => {
-            const { ctx } = canvas;
             if (
                 this.absoluteAnimates.size === 0 &&
                 this.staticAnimates.size === 0
             ) {
                 return;
             }
-            ctx.save();
             this.drawAnimates(this.absoluteAnimates, canvas);
             transformCanvas(canvas, transform);
             this.drawAnimates(this.staticAnimates, canvas);
-            ctx.restore();
         });
 
         this.delegation = this.delegateTicker(time => {

src/core/render/sprite.ts

@@ -33,9 +33,7 @@ export class Sprite<
         canvas: MotaOffscreenCanvas2D,
         transform: Transform
     ): void {
-        canvas.ctx.save();
         this.renderFn(canvas, transform);
-        canvas.ctx.restore();
     }
 
     setRenderFn(fn: RenderFunction) {