[cairo] cairo_xlib_surface_create
Chris Wilson
chris at chris-wilson.co.uk
Mon Jul 20 11:10:54 PDT 2009
On Mon, 2009-07-20 at 10:50 -0700, Charles سمير Doutriaux wrote:
> the following command
>
> surface = cairo_xlib_surface_create(display,
> drawable,
> visual,
> x,
> y);
>
> now returns:
>
> invalid value for an input Visual*
>
> I checked my visual seems ok and is TrueColor
INVALID_VISUAL should only be raised if the visual does not belong to
the display. Two checks are performed on the visual during
cairo_xlib_surface_create(). The first iterates over the visuals
attached to the display to find to which screen the visual belongs, and
then a second iteration to determine the visual's color depth. If either
search does not find the visual attached to the display, INVALID_VISUAL
is returned.
Attaching gdb and setting a breakpoint on _cairo_error() will tell you
the exact cause for the error. But from a read of the source, cairo
looks to be acting quite sanely.
Hope this helps.
-ickle
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