@tomorrowevening/hermes/dist/utils/ImageSequenceCapturer.cjs

An extendable set of Web Tools controlled via a separate window for non-intereference with content.

"use strict";Object.defineProperty(exports,Symbol.toStringTag,{value:"Module"});const c=`
self.onmessage = async ({ data }) => {
  if (data.type !== 'encode') return;
  const { bitmap, index, format, quality } = data;
  const canvas = new OffscreenCanvas(bitmap.width, bitmap.height);
  const ctx = canvas.getContext('2d');
  ctx.drawImage(bitmap, 0, 0);
  bitmap.close();
  const mime = format === 'jpeg' ? 'image/jpeg' : format === 'webp' ? 'image/webp' : 'image/png';
  const blob = await canvas.convertToBlob({ type: mime, quality });
  self.postMessage({ type: 'encoded', index, blob });
};
`;class h{worker;source;transfer;ctx;opts;_capturing=!1;_captured=0;_encoded=0;_pending=0;_lastFrameTime=-1/0;frames=new Map;constructor(s,t={}){this.source=s,this.transfer=document.createElement("canvas"),this.transfer.width=s.width,this.transfer.height=s.height,this.ctx=this.transfer.getContext("2d",{willReadFrequently:!0}),this.opts={format:t.format??"png",quality:t.quality??.92,prefix:t.prefix??"frame",padLength:t.padLength??5,maxQueue:t.maxQueue??32,fps:t.fps??30,onProgress:t.onProgress??(()=>{}),onError:t.onError??(e=>console.error("[ImageSequenceCapturer]",e))};const a=new Blob([c],{type:"application/javascript"}),r=URL.createObjectURL(a);this.worker=new Worker(r),URL.revokeObjectURL(r),this.worker.onmessage=({data:e})=>{e.type==="encoded"&&(this.frames.set(e.index,e.blob),this._pending--,this._encoded++,this.opts.onProgress(this._captured,this._encoded))},this.worker.onerror=e=>this.opts.onError(new Error(e.message))}get isCapturing(){return this._capturing}get framesCaptured(){return this._captured}get framesEncoded(){return this._encoded}get isIdle(){return this._pending===0}resize(){this.transfer.width=this.source.width,this.transfer.height=this.source.height}start(){this._capturing=!0,this._captured=0,this._encoded=0,this._pending=0,this._lastFrameTime=-1/0,this.frames.clear()}stop(){this._capturing=!1}captureFrame(){if(!this._capturing||this._pending>=this.opts.maxQueue)return!1;const s=performance.now();if(s-this._lastFrameTime<1e3/this.opts.fps)return!1;this._lastFrameTime=s,this.ctx.drawImage(this.source,0,0);const t=this._captured++;return this._pending++,createImageBitmap(this.transfer).then(a=>{this.worker.postMessage({type:"encode",bitmap:a,index:t,format:this.opts.format,quality:this.opts.quality},[a])}).catch(a=>{this._pending--,this.opts.onError(a)}),!0}flush(){return new Promise(s=>{const t=()=>this._pending===0?s():setTimeout(t,16);t()})}async download(){await this.flush();const s=this.opts.format==="jpeg"?"jpg":this.opts.format,a=[...this.frames.entries()].sort(([r],[e])=>r-e).map(([r,e])=>({name:`${this.opts.prefix}_${String(r).padStart(this.opts.padLength,"0")}.${s}`,blob:e}));if("showDirectoryPicker"in window)try{const r=await window.showDirectoryPicker({mode:"readwrite",startIn:"downloads"});await Promise.all(a.map(async({name:e,blob:i})=>{const n=await(await r.getFileHandle(e,{create:!0})).createWritable();await n.write(i),await n.close()}));return}catch(r){if(r.name==="AbortError")return}for(const{name:r,blob:e}of a){const i=URL.createObjectURL(e);Object.assign(document.createElement("a"),{href:i,download:r}).click(),URL.revokeObjectURL(i),await new Promise(n=>setTimeout(n,50))}}reset(){this._capturing=!1,this._captured=0,this._encoded=0,this._pending=0,this.frames.clear()}destroy(){this.reset(),this.worker.terminate()}}exports.ImageSequenceCapturer=h;