@pixi/assets
Version:
Asset manager for PixiJS, loading resolving and Cacheing
59 lines (58 loc) • 2.33 kB
JavaScript
"use strict";
var checkImageBitmap_worker = require("../../_virtual/checkImageBitmap.worker.js"), loadImageBitmap_worker = require("../../_virtual/loadImageBitmap.worker.js");
let UUID = 0, MAX_WORKERS;
class WorkerManagerClass {
constructor() {
this._initialized = !1, this._createdWorkers = 0, this.workerPool = [], this.queue = [], this.resolveHash = {};
}
isImageBitmapSupported() {
return this._isImageBitmapSupported !== void 0 ? this._isImageBitmapSupported : (this._isImageBitmapSupported = new Promise((resolve) => {
const { worker } = new checkImageBitmap_worker.default();
worker.addEventListener("message", (event) => {
worker.terminate(), checkImageBitmap_worker.default.revokeObjectURL(), resolve(event.data);
});
}), this._isImageBitmapSupported);
}
loadImageBitmap(src) {
return this._run("loadImageBitmap", [src]);
}
async _initWorkers() {
this._initialized || (this._initialized = !0);
}
getWorker() {
MAX_WORKERS === void 0 && (MAX_WORKERS = navigator.hardwareConcurrency || 4);
let worker = this.workerPool.pop();
return !worker && this._createdWorkers < MAX_WORKERS && (this._createdWorkers++, worker = new loadImageBitmap_worker.default().worker, worker.addEventListener("message", (event) => {
this.complete(event.data), this.returnWorker(event.target), this.next();
})), worker;
}
returnWorker(worker) {
this.workerPool.push(worker);
}
complete(data) {
data.error !== void 0 ? this.resolveHash[data.uuid].reject(data.error) : this.resolveHash[data.uuid].resolve(data.data), this.resolveHash[data.uuid] = null;
}
async _run(id, args) {
await this._initWorkers();
const promise = new Promise((resolve, reject) => {
this.queue.push({ id, arguments: args, resolve, reject });
});
return this.next(), promise;
}
next() {
if (!this.queue.length)
return;
const worker = this.getWorker();
if (!worker)
return;
const toDo = this.queue.pop(), id = toDo.id;
this.resolveHash[UUID] = { resolve: toDo.resolve, reject: toDo.reject }, worker.postMessage({
data: toDo.arguments,
uuid: UUID++,
id
});
}
}
const WorkerManager = new WorkerManagerClass();
exports.WorkerManager = WorkerManager;
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