2 lines
1.5 KiB
JavaScript
2 lines
1.5 KiB
JavaScript
(function(){"use strict";async function h(l,e,n){if(typeof createImageBitmap>"u"||typeof OffscreenCanvas>"u")throw new Error("createImageBitmap or OffscreenCanvas not supported in this worker");const s=await fetch(l);if(!s.ok)throw new Error("Failed to fetch image data");const d=await s.blob(),t=await createImageBitmap(d);try{let a=t.width,r=t.height;if(a>e||r>e){const i=Math.min(e/a,e/r);a=Math.round(a*i),r=Math.round(r*i)}const f=new OffscreenCanvas(a,r),o=f.getContext("2d");if(!o)throw new Error("Failed to get OffscreenCanvas context");o.imageSmoothingEnabled=!0,o.imageSmoothingQuality="high",o.drawImage(t,0,0,a,r);const g=await f.convertToBlob({type:"image/jpeg",quality:n});return await new Promise((i,u)=>{const c=new FileReader;c.onloadend=()=>i(c.result),c.onerror=u,c.readAsDataURL(g)})}finally{t.close()}}self.onmessage=async l=>{const e=l.data;try{if(e.type==="generate"){const n=await h(e.imageData,e.maxSize,e.quality),s={type:"result",id:e.id,thumbnailData:n};self.postMessage(s)}else if(e.type==="batch-generate"&&e.batch){const s=(await Promise.allSettled(e.batch.map(t=>h(t.imageData,t.maxSize,t.quality).then(a=>({id:t.id,thumbnailData:a})).catch(a=>({id:t.id,error:a.message}))))).map((t,a)=>{var r;return t.status==="fulfilled"?t.value:{id:e.batch[a].id,error:((r=t.reason)==null?void 0:r.message)||"Unknown error"}}),d={type:"batch-result",id:e.id,batch:s};self.postMessage(d)}}catch(n){const s={type:e.type==="generate"?"result":"batch-result",id:e.id,thumbnailData:"",error:n instanceof Error?n.message:String(n)};self.postMessage(s)}}})();
|