How to save a Flutter canvas as a bitmap image?

Question

I have a Flutter canvas , and I'd like to save that canvas as a bitmap image (e.g. PNG, but any common bitmap format will do). What's the best way to get the bits out of a canvas, converted to a bitmap image format?

Thanks very much!

Answer 1

1. Create a PictureRecorder.
2. Create a Canvas with your PictureRecorder and draw stuff.
3. Call endRecording() on the PictureRecorder to get a Picture.
4. Call toImage() on the Picture.
5. Call toByteData() on the Image. Oops, this isn't implemented yet. I filed an issue.