> Jos Dreesen wrote: > > The default drawing operator for fl_bitmap seems to be "OR" > > is there a way to just replace the existing pixels? > > Hmm, kinda sounds like maybe your widget isn't drawing background.
It isn't. > Possibly fltk's fl_bitmap() is not doing an 'or' so much as it's > only drawing the pixels that are 'set', so that one has the choice > to draw over an existing image. > > Try drawing an fl_rectf() just before your call to fl_bitmap() > using the background color you want. This works, i get a more or less usable display. But at the expected cost of some flicker. > Or, don't do that and just make sure the widget you're deriving > from has a solid box() type type of some kind, like box(FL_FLAT_BOX). > This way when the widget redraws, it won't leave the old image behind. This does not work. Any possibility to have a behaviour more in line with xlib's XPutIMage ? Thanks, Jos _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
