[Scummvm-devel] Non-hardcoded gameids

[Marcus Comstedt]

David Given <dg at cowlark.com> writes:

> Secondly, the game canvas is always 8bpp, but the overlay can be 8bpp or
> 16bpp --- so if I want to do 16bpp graphics, I'm going to have to draw
> on the overlay. What's the performance like when doing this? (I presume
> I create a 16bpp Surface, and use copyRectToOverlay to write the data.)
> How do I specify transparency?

On the Dreamcast, the overlay is in ARGB4444 format, so you specify
transparency with the 4 most significant bits.  All other backends
have opaque overlays, without transparency support, I think.


  // Marcus