I am having a problem with gdk_gc_set_function() The following code draws black lines:
gdk_draw_line(dwin1->window,gdkgc,x2,y2,x2+pw,y2); gdk_draw_line(dwin1->window,gdkgc,x2,y2,x2,y2+ph); gdk_draw_line(dwin1->window,gdkgc,x2,y2+ph,x2+pw,y2+ph); My wish is to replace the constant black lines with lines that invert whatever color they are being drawn over. I added gdk_gc_set_function() calls around the above code: gdk_gc_set_function(gdkgc,GDK_INVERT); gdk_draw_line(dwin1->window,gdkgc,x2,y2,x2+pw,y2); gdk_draw_line(dwin1->window,gdkgc,x2,y2,x2,y2+ph); gdk_draw_line(dwin1->window,gdkgc,x2,y2+ph,x2+pw,y2+ph); gdk_gc_set_function(gdkgc,GDK_COPY); The drawn lines are the inverse of the foreground color, not the inverse of the replaced RGB pixels. I tried the other functions and I never got anything but the foreground color (black) or its inverse (white). I must not be understanding something in the documentation. Can someone please help? thanks -- View this message in context: http://www.nabble.com/gdk_gc_set_function%28%29-mystery-tf2862634.html#a7999334 Sent from the Gtk+ - Apps Dev mailing list archive at Nabble.com. _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
