Hi, I have encountered problem that fl_create_offscreen() fails on certain platforms (win 7) under certain circumstances, eg when called from menu. This problem appears only on some platforms - like win 7 (on win XP it seems to work fine).
Under further investigation it looks like it is caused by the fact that fl_gc is NULL (probably fl_gc is reset to 0 after menu window is closed - maybe the callback is called AFTER the menu window destructuion?) at that stage and CreateCompatibleBitmap() function (within fl_create_offscreen()) does not have a valid DC reference. This means that it is safe to call fl_create_ofscreen() only within draw() methods when fl_gc is valid. I have resolved (made work-around) the problem by postponing the calls to offscreen functions during redraw but in general I believe that it should be possible to create/manipulate offscreens at any time. Any thoughts from Win32 API gurus? _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
