On Thu 17 Jan 2002 10:01, Havoc Pennington wrote: > Edscott Wilson García <[EMAIL PROTECTED]> writes: > > I've been trying to copy a bitmap into a bitmap with gdk_draw_pixmap(), > > without success. Is it necesary to use XCopyPlane in lieu of some > > gdk routine? > > When you say "without success," what happens? It should work fine.
I get messages like: xftree: Fatal XLib internal error BadMatch (invalid parameter attributes) Request 62, Error 8 when I try to use the resulting bitmap. It croaks with only one copy from existing bitmap to a bitmap created with gdk_pixmap_new(window,pix_w,pix_h,1). After looking at a book by Barkakati, (X Window System Programming, 1991) he says that bitmaps should be copied into pixmaps by XCopyPlane(), not XCopyArea() (the latter being used by gdk_draw_pixmap()). > > > Basically all I want to do is a binary OR between the data in the 2 > > bitmaps. > > That isn't what gdk_draw_pixmap() normally does, it just copies the > bits and overwrites the ones in dest. Look at gdk_gc_set_function(), > I'm not sure it affects drawing a pixmap but I think it might. Basically what I want is a transparency mask resulting from the combination of two (or more) pixmaps with different transparency masks. Which would be a binary AND between the data. I'll look at gdk_gc_set_function(), and see what I can do with it. saludos, Edscott > > Havoc _______________________________________________ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
