I recently wrote a program to handle copy/paste of text and images using X11 for Linux. Most things are working nicely, I can copy an image to the clipboard and sucessfully retrieve it and I can paste images copied from other programs.

My problem however is that if I use my program (xcsi) to copy an image, then I can't paste it into Gimp (not Inkscape either).

My program logs all selection requests made by other programs, and I can see that Gimp requests the TARGETS selection from my program several times. The paste option is not grayed out in Gimp after copying an image with my program, but Gimp never makes a request for image/bmp or image/png when my program offers it.

Can someone help explain how Gimp handles pasting and how I might get this working please? At first I thought it was a problem with Gimp because it never requests the image, but copying from Firefox and pasting into Gimp works, so maybe it's something I'm doing wrong then.

The source code from my latest version of the program is here on an Allegro forum thread :
http://www.allegro.cc/forums/thread/606034/909368#target

Using openSUSE 11.3, and Gimp version 2.6.8-6.1.