@allmaps/render/dist/tilecache/CacheableWorkerImageDataTile.js

Render functions for WebGL and image buffers

import { proxy } from "comlink";
import { CacheableTile } from "./CacheableTile.js";
import { WarpedMapEvent, WarpedMapEventType } from "../shared/events.js";
class CacheableWorkerImageDataTile extends CacheableTile {
  #worker;
  constructor(fetchableTile, worker, fetchFn) {
    super(fetchableTile, fetchFn);
    this.#worker = worker;
  }
  /**
   * Fetch the tile and create its ImageData using a WebWorker.
   *
   * @returns
   */
  async fetch() {
    try {
      this.#worker.getImageData(
        this.tileUrl,
        proxy(() => this.abortController.abort()),
        this.fetchFn,
        this.tile.tileZoomLevel.width,
        this.tile.tileZoomLevel.height
      ).then((response) => {
        this.data = response;
        this.dispatchEvent(
          new WarpedMapEvent(WarpedMapEventType.TILEFETCHED, this.tileUrl)
        );
      }).catch((err) => {
        if (err instanceof Error && err.name === "AbortError") {
          console.log("Fetch aborted");
        } else {
          console.error(err);
        }
      });
    } catch (err) {
      if (err instanceof Error && err.name === "AbortError") ;
      else {
        this.dispatchEvent(
          new WarpedMapEvent(WarpedMapEventType.TILEFETCHERROR, this.tileUrl)
        );
      }
    }
    return this.data;
  }
  static createFactory(worker) {
    return (fetchableTile, fetchFn) => new CacheableWorkerImageDataTile(fetchableTile, worker, fetchFn);
  }
}
export {
  CacheableWorkerImageDataTile
};
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