I have been experimenting with SyncFB now that it's
working again, and I have noticed that the video image
(as compared to the video window) is always initially
placed at (0,0). This seems to be due to GUI changes:
(gVw->xwin, gVw->ywin) are initialised to (-8192,
-8192) which means that the video_frame_callback()
functions returns gui_win_x=0 and gui_win_y=0.
Once the video window has been moved (ConfigureNotify
event?), gVw->xwin and gVw->ywin are set correctly.
(Well, maybe not *quite* correctly, but close enough
to within a few pixels.)
Full-screen mode seems OK, though.
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