[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:

> There is an AlphaBlend() function in Windows GDI, but according to MSDN
> it's not supported under Windows 95.  I could write a function to alpha
> blend pixel by pixel, but it'd probably be very slow.  Though it'd only
> be slow when creating the fog sprites.

Seems reasonable.  Can you use this function to draw fog at draw-time 
without loss of speed?

> On a related note, are we going to move on to an alpha layer with
> sprites, as opposed to a mask?  So we'd be able to have translucent
> areas of sprites and translucent edges, for pseudo edge antialiasing?

It is a good idea.  Currently fog is done by the GUI code, so any GUI 
can implement it.  I don't really know how it would be done.

jason