[Freeciv-Dev] Re: (PR#13567) a relief layer for the overview

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=13567 >

Mateusz Stefek wrote:
> <URL: http://bugs.freeciv.org/Ticket/Display.html?id=13567 >
> 
> Could it be done in a way that the borders were somehow transparent?

Making layers (like a fog layer) partially transparent would be rather
nice.  However with the current design this is rather hard.  One problem
is the canvas functions don't have any support for alpha levels - such
support should probably be added directly to the color struct.  Another
much simpler problem is that the overview loop will have to be changed -
currently we loop over layers from top to bottom and stop as soon as we
find a match.

-jason