Wireshark-bugs: [Wireshark-bugs] [Bug 1953] On Leopard, Wireshark starts up and when I choose to
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1953
guy@xxxxxxxxxxxx changed:
What |Removed |Added
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Summary|WIreshark starts up and when|On Leopard, Wireshark starts
|I choose to start a capture,|up and when I choose to
|the program crashes and the |start a capture, the program
|following shows up. |crashes with a BadMatch
| |error.
------- Comment #1 from guy@xxxxxxxxxxxx 2007-10-29 18:35 GMT -------
Switch to displaying "Thousands" rather than "Millions" of colors in the
X11.app preferences as a workaround.
This might be a bug in Leopard's X server, or it might be a bug in Pango, or
Cairo, or even GTK+. I've filed a bug at Apple (5147896) against the X11
server and at the GNOME Bugzilla (476409) about Pango; I should probably file
one against Cairo and tie 'em all together, so that we have people responsible
for all those layers looking at the problem.
The failing request is a CreatePicture Render request; according to
http://webcvs.freedesktop.org/xorg/xc/doc/specs/Render/protocol?view=co
a CreatePicture Render extension request can return a Match error (presumably
that's BadMatch) if:
the picture format has a different depth from the drawable;
the drawable is a Window and the Red, Green, and Blue masks don't match
those in the visual for the window;
the alpha-map argument refers to a picture containing a Window rather than
a Pixmap;
a pixmap was specified as the clip-mask, and it doesn't have depth 1 or
doesn't have the same root as the drawable.
It turns out that the problem is probably "the picture format has a different
depth from the drawable"; the picture format has a depth of 24 bits, and the
drawable has a depth of 32 bits.. 32 presumably means 8 bits of red, 8 bits of
green, 8 bits of blue, and 8 bits of alpha. Whether 24, in that context, means
8 bits of red, 8 bits of green, and 8 bits of blue, or 16 bits of color and 8
bits of alpha, is a good question. If all it cares about is the depth, rather
than the interpretation of the bits, then perhaps with 16-bit color ("thousands
of colors" presumably meaning 65536 colors) you get 16 bits of color and 8 bits
of alpha for the drawable.
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