| self.onmessage = function(e) { |
| // Worker does two things: |
| // 1. call createImageBitmap() from the ImageBitmap that is transferred |
| // from the main thread, which verifies that createImageBitmap(ImageBitmap) |
| // works on the worker thread. |
| // 2. send the created ImageBitmap back to the main thread, the |
| // main thread exam the property of this ImageBitmap to make sure |
| // the transfer between main and worker thread didn't lose data |
| createImageBitmap(e.data.data).then(imageBitmap => { |
| postMessage({data: imageBitmap}, [imageBitmap]); |
| }); |
| }; |
