53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
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(function () {
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'use strict';
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const root = window.PixelIslandModules ||= {};
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let worker = null;
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let nextId = 1;
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const pending = new Map();
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function canUseWorkers() {
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return typeof Worker === 'function';
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}
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function getWorker() {
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if (!canUseWorkers()) return null;
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if (worker) return worker;
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worker = new Worker('./js/pixel-worker.js');
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worker.onmessage = (event) => {
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const { id, ok, result, error } = event.data || {};
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const entry = pending.get(id);
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if (!entry) return;
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pending.delete(id);
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if (ok) entry.resolve(result);
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else entry.reject(new Error(error || 'worker_error'));
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};
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worker.onerror = (event) => {
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const error = new Error(event.message || 'worker_error');
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for (const entry of pending.values()) entry.reject(error);
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pending.clear();
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worker?.terminate();
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worker = null;
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};
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return worker;
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}
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function request(type, payload) {
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const target = getWorker();
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if (!target) return Promise.reject(new Error('workers_unavailable'));
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const id = nextId++;
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const promise = new Promise((resolve, reject) => pending.set(id, { resolve, reject }));
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target.postMessage({ id, type, payload });
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return promise;
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}
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function buildPixelBlobs(assets) {
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return request('buildPixelBlobs', {
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assets,
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palette: root.Palette?.PALETTE || [],
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defaultColorCode: root.Palette?.DEFAULT_SELECTED_COLOR_CODE || 'a'
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});
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}
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root.WorkerClient = { canUseWorkers, buildPixelBlobs };
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})();
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