Understanding RA format tmp terrain files?

[Nyerguds]

Huh. So the game supports transparent tmp files, then? I thought it always messed up colour #0 by treating it as transparent.

 

So, um, that just seems like one boolean. How is it an array? Or do you mean it's also per cell?

[Blade]

TransFlag is actually an offset to one of the arrays in the footer of the file, its the footer array that contains the values treated as bools flagging each cell image as using the transparent blitter or not. This is for the software blitter at any rate, there is also a code path that caches the tiles as directdraw surfaces, its behaviour regarding the flags might be different.

[Nyerguds]

Ah. And they're one byte per boolean, there?

[Blade]

It would appear so, yeah.