Support for Atari ST mono rendering

[mikrosk]

Not sure if you are aware of it but many SCUMM and SCI games had support for Atari ST's mono monitor built-in, see for example here: ​https://www.atari-forum.com/viewtopic.php?p=31611#p31611

I don't know whether the engine was rendering/dithering into 640x400x1bpp on the fly (most likely) or it had pre-rendered 640x400x1bpp backgrounds on the disk (unlikely but who knows) but it would be a nice feature to have. Especially if you manage to apply the same algorithm also for games which did not have this support on Atari platform.

I'll attach a couple of screenshots for comparison.