The particular problem I was having was that frame->leftWidth was 0 and leftHeight was 0, but
frame->rightWidth was > 0. And, while trying to paint a 0x0 pixmap is apparently fine
(because QPixmap::isNull() is just (QPixmap::width() == 0)),
QPainter::drawTiledPixmap() tries to do 0 % 0 if you pass it an 8x0 pixmap (which is an
arithmetic error).
And this was happening in KSMServer when displaying the shutdown dialog.
Cue weird behaviour when trying to log out or shut down.
svn path=/trunk/KDE/kdelibs/; revision=909140
resizing is same speed, still pixmap->bitmap->region
just repainting should be quite faster
one of the last bic changes
svn path=/trunk/KDE/kdelibs/; revision=897385
resized and save all of them at once at a timer event.
this way when a big number of scales is done in little time (e.g. applet
reszing) prevents too many disk writes and qimage conversions
svn path=/trunk/KDE/kdelibs/; revision=890663
