Feature request: Screenshot function

[kanwakyuudai]

Recently I switching to Sameboy from bgb, I really like the Monochrome LCD filter, it recalls my childhood memories. So thanks to all developers of this fantastic project!

I'd like to have a keyboard shortcut for screenshot function, I were used to screenshot each games' title screen to make my game library more intuitive, also for my own satisfying. I also noticed that color correction works differently in every single emulator: https://pokefan531.tumblr.com/image/176856035828

Since my old screenshots were captured by BGB (they all looks like a bit washed out at BGB's default settings), so I really need a quick way to take a bunch of new screenshots for maintain consistency.

I wish these suggestions could be considered by developers, if there is any chance that user can choose screenshot output formats (such as bmp, png and jpg) and size (either in actual DMG size 160x144 or current scaling size) would be great!

[eisnerguy1]

I would also love to have this feature. It's the one feature I find myself missing from other GB emulators like mGBA.

[RiedleroD]

I second this, a builtin screenshot feature would be nice