So with a bit of testing I've realised it would actually be 4bpp (16 colours for the boxart and therefore double resolution) and 5bpp for the screenshots (32 colours). Haven't implemented dithering at this stage for the boxart. I may well add this (I hadn't needed it before because my builder was always working in 256 colours for AGA machines
. But screenshots are only resized if they are some odd doubled size from the dababase (of which there are a few).
Tested without the black bars and no, it's not centreing the image vertically without them (this is important for games like Mercs too). So I i'll probably opt to have the bars included.
And yes, to be fair on everyone, we're probably going to have both PAL and NTSC sets at different resolutions. This will need additional resizing in places, but I'll avoid wherever possible. Hopefully I'll have something to show later today.
