[Plib-users] Transparent Background

[Alexander R. <a_r...@in...>]

Hi,

I have some pictures I like to use as explosion, galaxies, background
image etc.,
but I need their background to be transparent, instead of color black.

I did load one of those into gimp, and gimp showed me that the picture
had
no alpha channel, and that the background was indeed black not
transparent.

OK - I managed to add a alpha layer to the picture and could erase parts
of
the picture from black to transparent with the eraser but - parts of the
picture
are too fine/delicate for that tool, I'd better like to say something
like
"Hey gimp, please fill from here with transparency" or
"Hey gimp, please replace color black with transparency" but
I didn't find it (gimp newbie). Comments?
I managed to fill with some other color, but not with transparency.

Or is there an other batch-tool, that converts color black to
transparency for all
images I like?

Or can I say GL/plib to load an object/image an declare color black as
transparent?


Alex

-- 
                   Alexander Rawass
          Email: ale...@us...
   Project Homepage: http://kobayashimaru.sourceforge.net
...but some day you'll be a STAR in somebody else's SKY...