[Freeciv-Dev] Re: (PR#8215) win32 client: draw_fog_part doesn't use a mask

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=8215 >

James Canete wrote:

> I actually wanted to use the new crop_sprite() to combine the old
> fog_sprite with sprite_mask, but my first attempt didn't work and I
> figured it's faster as is anyway.

This is a possible solution.  The drawback is that you need almost twice 
as many sprites since each mapview sprite has a regular and a fog sprite.

The advantage is that you can fog via alpha-layer drawing rather than 
via stippling.  Just draw a 50% (or so) alpha-layer black rectangle over 
the entire sprite, without changing the mask.  This is what gui-SDL does 
(except it *doesn't* duplicate the sprites but uses a hack to do the 
drawing).

jason