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

Render functions for WebGL and image buffers

import { fetchUrl } from "@allmaps/stdlib";
import { CacheableTile } from "./CacheableTile.js";
import { WarpedMapEvent, WarpedMapEventType } from "../shared/events.js";
class CacheableIntArrayTile extends CacheableTile {
  getImageData;
  constructor(fetchableTile, getImageData, fetchFn) {
    super(fetchableTile, fetchFn);
    this.getImageData = getImageData;
  }
  /**
   * Fetch the tile and create its IntArray data using the supplied getImageData function.
   *
   * @returns
   */
  async fetch() {
    try {
      const response = await fetchUrl(
        this.tileUrl,
        {
          signal: this.abortController.signal
        },
        this.fetchFn
      );
      const arrayBuffer = await response.arrayBuffer();
      this.data = this.getImageData(new Uint8ClampedArray(arrayBuffer));
      this.dispatchEvent(
        new WarpedMapEvent(WarpedMapEventType.TILEFETCHED, this.tileUrl)
      );
    } catch (err) {
      if (err instanceof Error && err.name === "AbortError") ;
      else {
        this.dispatchEvent(
          new WarpedMapEvent(WarpedMapEventType.TILEFETCHERROR, this.tileUrl)
        );
      }
    }
    return this.data;
  }
  static createFactory(getImageData) {
    return (fetchableTile, fetchFn) => new CacheableIntArrayTile(fetchableTile, getImageData, fetchFn);
  }
}
export {
  CacheableIntArrayTile
};
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