Usage in Web Workers (again) #15
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question
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Hi @bentron2000, I think it should work without any issues, as long as you override Emscripten's importScripts('./vips.js');
Vips({
locateFile: (fileName, scriptDirectory) => scriptDirectory + fileName,
mainScriptUrlOrBlob: './vips.js',
}).then(vips => {
const im = vips.Image.black(100, 100);
console.log(JSON.stringify({
width: im.width,
height: im.height,
space: im.interpretation,
channels: im.bands,
depth: im.format
}));
const outBuffer = im.writeToBuffer('.png');
console.log(outBuffer);
im.delete();
postMessage('Done!');
});const worker = new Worker('worker.js');
worker.onmessage = e => console.log(e.data);I see: |
Closed
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Amazing! That was exactly what I was looking for. Thank you. I've put in a PR with that parameter in the typescript defs to make it easier to find for others. #16 Really appreciate your efforts on this project - just great :) B |
Closed
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FWIW, wasm-vips' ES6 modules doesn't require overriding Emscripten's
import Vips from './vips-es6.js';
Vips({
// Optimize startup time by disabling the dynamic modules
dynamicLibraries: []
}).then(vips => {
const im = vips.Image.black(100, 100);
console.log(JSON.stringify({
width: im.width,
height: im.height,
space: im.interpretation,
channels: im.bands,
depth: im.format
}));
const outBuffer = im.writeToBuffer('.png');
console.log(outBuffer);
im.delete();
postMessage('Done!');
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>wasm-vips in a ES6 web worker</title>
</head>
<body>
<script>
const worker = new Worker('es6-worker.js', { type: 'module' });
worker.onmessage = e => console.log(e.data);
</script>
</body>
</html>$ docker run -p 8080:80 --rm -v $(pwd):/src emscripten/emsdk:3.1.49 emrun --port 80 --no_browser /src
# Visit http://localhost:8080/index.html(this example assumes |
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I saw a previous query about using
wasm-vipsin a web worker - but the op closed it due to realising that the lib opens its own web worker. #7Would it be possible to use this lib inside a custom webworker? if so - any guidance would be greatly appreciated.
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