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javascripthtmlhtml5-canvasweb-worker

Web Workers and Canvas

Are web workers allowed to access a canvas object?

Solution

  • Small update, as the question is now more than half a year old:

    In Chrome/Chromium 6 you can now send a canvas' ImageData object to a web worker, let the web worker make changes to the object and then write it back to the canvas using putImageData(..).

    Google's Chromabrush does it this way, the source-code can be found here:

    Update:

    The latest development snapshots of Opera (10.70) and Firefox (4.0b1) also support passing ImageData objects to a web worker.

    Update 2017:

    Actual links from Github (easier to find needed files from Chromabrush):