mirror of
https://github.com/netbymatt/ws4kp.git
synced 2026-04-14 15:49:31 -07:00
8ead95c041
- Switch to safe*() methods for centralized error handling - Add error handling and validation - Optimize radar API usage by only fetching yesterday's data when needed - Use centralized URL rewriting for caching proxy support - Add debug logging throughout radar processing pipeline - Improve canvas context validation and error recovery - Handle worker errors gracefully by setting totalScreens = 0 to skip in animation - Remove unused OVERRIDES parameter passing to workers
84 lines
3.3 KiB
JavaScript
84 lines
3.3 KiB
JavaScript
import { removeDopplerRadarImageNoise } from './radar-utils.mjs';
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import { RADAR_FULL_SIZE, RADAR_FINAL_SIZE } from './radar-constants.mjs';
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onmessage = async (e) => {
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try {
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const {
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url, radarSourceXY, debug,
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} = e.data;
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if (debug) {
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console.log('[RADAR-WORKER] Message received at:', new Date().toISOString(), 'File:', url.split('/').pop());
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}
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// get the image (URL is already rewritten for caching by radar.mjs)
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const radarResponsePromise = fetch(url);
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// calculate offsets and sizes
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const radarSource = {
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width: 240,
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height: 163,
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x: Math.round(radarSourceXY.x / 2),
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y: Math.round(radarSourceXY.y / 2),
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};
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// create radar context for manipulation
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const radarCanvas = new OffscreenCanvas(RADAR_FULL_SIZE.width, RADAR_FULL_SIZE.height);
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const radarContext = radarCanvas.getContext('2d');
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if (!radarContext) {
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throw new Error('Failed to get radar canvas context');
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}
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radarContext.imageSmoothingEnabled = false;
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// test response
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const radarResponse = await radarResponsePromise;
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if (!radarResponse.ok) throw new Error(`Unable to fetch radar image: got ${radarResponse.status} ${radarResponse.statusText} from ${radarResponse.url}`);
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// get the blob
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const radarImgBlob = await radarResponse.blob();
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// assign to an html image element
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const radarImgElement = await createImageBitmap(radarImgBlob);
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// draw the entire image
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radarContext.clearRect(0, 0, RADAR_FULL_SIZE.width, RADAR_FULL_SIZE.height);
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radarContext.drawImage(radarImgElement, 0, 0, RADAR_FULL_SIZE.width, RADAR_FULL_SIZE.height);
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// crop the radar image without scaling
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const croppedRadarCanvas = new OffscreenCanvas(radarSource.width, radarSource.height);
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const croppedRadarContext = croppedRadarCanvas.getContext('2d');
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if (!croppedRadarContext) {
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throw new Error('Failed to get cropped radar canvas context');
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}
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croppedRadarContext.imageSmoothingEnabled = false;
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croppedRadarContext.drawImage(radarCanvas, radarSource.x, radarSource.y, croppedRadarCanvas.width, croppedRadarCanvas.height, 0, 0, croppedRadarCanvas.width, croppedRadarCanvas.height);
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// clean the image
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removeDopplerRadarImageNoise(croppedRadarContext);
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// stretch the radar image
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const stretchCanvas = new OffscreenCanvas(RADAR_FINAL_SIZE.width, RADAR_FINAL_SIZE.height);
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const stretchContext = stretchCanvas.getContext('2d', { willReadFrequently: true });
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if (!stretchContext) {
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throw new Error('Failed to get stretch canvas context');
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}
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stretchContext.imageSmoothingEnabled = false;
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stretchContext.drawImage(croppedRadarCanvas, 0, 0, radarSource.width, radarSource.height, 0, 0, RADAR_FINAL_SIZE.width, RADAR_FINAL_SIZE.height);
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const stretchedRadar = stretchCanvas.transferToImageBitmap();
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if (debug) {
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console.log('[RADAR-WORKER] Sending processed radar at:', new Date().toISOString(), 'Canvas size:', stretchCanvas.width, 'x', stretchCanvas.height, 'File:', url.split('/').pop());
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}
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postMessage(stretchedRadar, [stretchedRadar]);
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} catch (error) {
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console.warn('[RADAR-WORKER] Error at:', new Date().toISOString(), 'Error:', error.message);
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// Handle radar fetch errors by indicating failure to the main thread
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// This allows the radar display to set totalScreens = 0 and skip in animation
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postMessage({ error: true, message: error.message });
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}
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};
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