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quartz: NSWindow NULL check in get_scale_factor

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Sending backingScaleFactor to a NULL NSWindow will silently give the
value 0 for the scale factor, causing insidious divide-by-zero bugs down
the line. This checks if the NSWindow is NULL first, as seems to happen
throughout the rest of the file.

Note that I don't have a hi-DPI OS X machine to test this on, though.

https://bugzilla.gnome.org/show_bug.cgi?id=738338
This commit is contained in:
Philip Chimento 2014-10-10 21:35:23 -07:00 committed by John Ralls
parent 4bd787f2af
commit ec37fbe2e2
1 changed files with 1 additions and 1 deletions
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2
gdk/quartz/gdkwindow-quartz.c
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@ -2852,7 +2852,7 @@ gdk_quartz_window_get_scale_factor (GdkWindow *window)
impl = GDK_WINDOW_IMPL_QUARTZ (window->impl);
if (gdk_quartz_osx_version() >= GDK_OSX_LION)
if (impl->toplevel != NULL && gdk_quartz_osx_version() >= GDK_OSX_LION)
return [(id <ScaleFactor>) impl->toplevel backingScaleFactor];
return 1;