To support createImageBitmap() to retrieve and manipulate raw bitmap data (typically in WebWorker) from various sources. e.g. Image, Canvas and Video. Existing workaround is to create dummy canvas and call drawImage(), which is not efficient especially when we are manipulating animations, canvases & videos.
I wrote a toy app that ended up not working in Safari because of this; looking forward to seeing some progress here. https://chromiumizer.now.sh/
There's a partial implementation; bug 182424 tracks the completion.
*** This bug has been marked as a duplicate of bug 178573 ***