Last active
May 22, 2018 08:49
-
-
Save Makio64/cc9fae0770ef56e6aaf756bfe5d8d871 to your computer and use it in GitHub Desktop.
webworker from function and webworkerImageLoad
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
function createWorker(f) { | |
return new Worker(URL.createObjectURL(new Blob([`(${f})()`]))); | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
const worker = createWorker(() => { | |
self.addEventListener('message', e => { | |
let src = e.data | |
fetch(src) | |
.then(response => response.blob()) | |
.then(blob => createImageBitmap(blob)) | |
.then(bitmap => { | |
self.postMessage({ src, bitmap }, [bitmap]); | |
}); | |
}); | |
}); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
export default function webworkerImageLoad(src) { | |
return new Promise((resolve, reject) => { | |
function handler(e) { | |
if (e.data.src === src) { | |
worker.removeEventListener('message', handler); | |
if (e.data.error) { | |
reject(e.data.error); | |
} | |
resolve(e.data); | |
} | |
} | |
worker.addEventListener('message', handler); | |
worker.postMessage(src); | |
}); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment