"use strict";var e=require("gifuct-js");exports.Decoder=class{url;parseGIF;constructor(e){this.url=e}async decode(){const t=await this.fetchImageData(this.url);return this.parseGIF=e.parseGIF(t),this.validateAndFixFrame(this.parseGIF),this.parseGIF}async decompressFrames(){this.parseGIF||await this.decode();const t=await e.decompressFrames(this.parseGIF,!0);return{frames:this.generate2ImageData(t),delays:t.map((e=>e.delay)),parsedFrames:t}}validateAndFixFrame=e=>{let t=null;for(const r of e.frames)t=r.gce?r.gce:t,"image"in r&&!("gce"in r)&&(r.gce=t)};generate2ImageData(e){return e.map((e=>{const t=e?.dims,r=new ImageData(t.width,t.height);return r.data.set(e.patch),r}))}generate2ImageDataWithPixelsModified(e,t){return e.map(((e,r)=>{t[r];const a=this.parseGIF.lsd,s=new ImageData(a.width,a.height);return s.data.set(new Uint8ClampedArray(e)),s}))}fetchImageData(e){return new Promise(((t,r)=>{const a=new XMLHttpRequest;a.open("GET",e,!0),a.responseType="arraybuffer",a.onload=e=>{if(!(e.target instanceof XMLHttpRequest))return;if(200!==e.target.status&&304!==e.target.status)return void r("Status Error: "+e.target.status);let a=e.target.response;a.toString().indexOf("ArrayBuffer")>0&&(a=new Uint8Array(a)),t(a)},a.onerror=e=>{r(e)},a.send()}))}handlePixels(e){const t=this.parseGIF.lsd,r=t.width*t.height*4,a=[];for(let s=0;s<e.length;++s){const i=e[s],n=0===s||2===e[s-1].disposalType?new Uint8ClampedArray(r):a[s-1].slice();a.push(this.putPixels(n,i,t))}return a}putPixels(e,t,r){if(!t.dims)return e;const{width:a,height:s,top:i,left:n}=t.dims,o=i*r.width+n;for(let i=0;i<s;i++)for(let s=0;s<a;s++){const n=i*a+s,d=t.pixels[n],h=o+i*r.width+s,p=t.colorTable[d]||[0,0,0];d===t.transparentIndex?(e[4*h]=0,e[4*h+1]=0,e[4*h+2]=0,e[4*h+3]=0):(e[4*h]=p[0],e[4*h+1]=p[1],e[4*h+2]=p[2],e[4*h+3]=255)}return e}};
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