slow pixbuf drawing, how get rid of alpha channel

[Fritz Ganter <ganter ganter at>]

Hello!

I'm using image=gdk_pixbuf_new_from_file to load gifs and png files.
Then I have to do
      tempimage = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 1, 8, 1280, 1024);
There my program eats 30-35% of CPU. This is much more than the old
gtk+1.2 version.
If I use no alpha channel instead 
gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0,...);
the cpus load drops down to about 10-15% which is ok.
Unfurtunatly it works only with png images, if a gif is loaded i get:

** (gpsdrive:20432): CRITICAL **: file pixops.c: line 1618
(pixops_scale): assertion `!(src_has_alpha && !dest_has_alpha)' failed

How can I remove the alpha channel from image if it is a gif-file?


-- 
Fritz "der mit dem Linux tanzt" Ganter         http://www.kraftvoll.at
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