Painting black on white with a tolerance of zero freezes everything

[Bios-Marcel]

I can't explain why this happens and I don't know how to debug this, as my whole browser just freezes. Super strange, it really only happens with tolerance 0 and white on black. While this script looks unmaintained, I thought it'd be nice to just document it at least :D

[binarymax]

I've been struggling with this issue for awhile. I've tried numerous times to fix it and always end up either failing or making other things worse. I know this lib looks unmaintained but I've gone through the algo so many times in the past 2 years and I admit defeat. Looking for someone to help out here, so if you'd like to take a shot at it I'd be much appreciative!