How to use gdk_display_get_default () ? (Mutter related doubt)

[Parin Porecha <parinporecha gmail com>]

Hi,

Mutter uses GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()) to get the Xdisplay of the default GdkDisplay. When I run mutter (gnome-3-10 branch) through JHBuild, it is able to get the default GdkDisplay without any problem.

But, when I write this code in a blank file -

Display *display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());

printf("Name of display is = %s\n", gdk_display_get_name(gdk_display_get_default ()));

and run it, I get this error -

Gdk-CRITICAL **: gdk_x11_display_get_xdisplay: assertion `GDK_IS_DISPLAY (display)' failed

Gdk-CRITICAL **: gdk_display_get_name: assertion `GDK_IS_DISPLAY (display)' failed

Name of display is = (null)

Is there something mutter does before calling gdk_display_get_default () ?

(I couldn't find a mailing-list for mutter, so I had to post this here. Sorry if this isn't the appropriate list for mutter related questions)

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Regards,
Parin Porecha