A co-worker of mine has a laptop with a small display and two larger displays.
When enabling the larger displays (and disabling the built-in display), the
wallpaper was set incorrectly. Only the size of the old, smaller screen actually
contained the wallpaper and the left was black.
The reason for this is that the code directly draws the new wallpaper to the
pixmap containing the old wallpaper. However, because the old display was
smaller, this pixmap isn't as large as the screen and so couldn't contain all of
the new wallpaper.
Fix this by explicitly creating a surface of the needed size and copying the old
wallpaper into it (because we might be setting only the wallpaper of some
screen, not all of them).
Special-thanks-to: vsp
Signed-off-by: Uli Schlachter <psychon@znc.in>
When no wallpaper exists yet, instead of creating a black image surface which
covers all the screens, just create a surface for the screen which we need. This
means that way less pixels have to be uploaded to the X11 server, which should
be faster.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Uli Schlachter
Emmanuel Lepage Vallee
Thomas Jost