[crossfire] Partial transparency

[Alex Schultz]

Mark Wedel wrote:

>  IIRC, gtk has no convenient way on handling the alpha channel (the 
>inconvenient way would be for the program to figure it all on its own, figuring 
>out the appropriate RGB values, and then drawing those point by point to the 
>screen.  This is also pretty CPU intensive).  So I don't expect to add that 
>support anytime soon (it would basically be a complete re-write of how images 
>are handled).
>
Actually, gtk does support it through this api:
http://www.gtk.org/api/2.6/gdk/gdk-Drawing-Primitives.html#gdk-draw-pixbuf
However it isn't necessarily fast, but I believe on modern machines, 
given how little crossfire redraws compared to most things, this cost 
would not be that significant.

Alex Schultz