[Xastir] Weather maps are now black

[Gerry Creager]

CHecking... more when I can.

gerry

Curt, WE7U wrote:
> On Wed, 20 Jun 2007, Curt, WE7U wrote:
> 
>> Hmmm...  We _could_ change that by adding a fixed length table or a
>> linked list of transparent values found in the .geo.  This would
>> slow down the rendering code a bit if there were several values
>> listed, but it doesn't sound terribly difficult to add this feature.
>> This could also allow some neat stuff like removing removing water,
>> railroads, green areas, etc. from other maps.
>>
>> If implementing this I'd probably recommend a linked list so that
>> the number of transparent values possible wasn't fixed.
> 
> map_geo.c:
> 
>     unsigned long trans_color
> 
>     draw_WMS_map(w,
>             filenm,
>             destination_pixmap,
>             fileimg,
>             do_check_trans,
>             trans_color,
>             nocache);
> 
>     int check_trans (XColor c, unsigned long c_trans_color);
> 
> We'd want to change "trans_color" to an array or linked list, change
> the section where we look for "TRANSPARENT" so that it adds to the
> list instead of working on "trans_color" each time, then change
> check_trans() to pass it the list of transparent colors so that it
> can check each pixel against the entire list.  Change draw_WMS_map()
> to work against the entire list as well if we want to be complete.
> 
> --
> Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
> "Lotto:    A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> "The world DOES revolve around me:  I picked the coordinate system!"
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
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