X2Go Bug report logs - #205
Patch for fix cairo issue

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Package: nx-libs; Maintainer for nx-libs is X2Go Developers <x2go-dev@lists.x2go.org>;

Reported by: Nicolas DEFFAYET <nicolas@deffayet.com>

Date: Fri, 10 May 2013 21:18:01 UTC

Severity: normal

Tags: moreinfo, patch

Found in version 3.5.0.20-0

Done: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Bug is archived. No further changes may be made.

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Subject: Bug#205: Some comments on this
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In nxagent-3.5.0-8 NoMachine has tweaked the version number of
nxagent to work better with cairo. So doing this is not completely
unusual for NX...

In nx-X11/programs/Xserver/hw/
nxagent/Init.c you can find these lines:
-----------------------------------------------------------
/*
* Avoid slowness due to buggy_repeat workaround
* in libcairo versions >= 1.10.
*/

SetVendorRelease(70000000);
-----------------------------------------------------------

And in the CHANGELOG:
-----------------------------------------------------------
nxagent-3.5.0-8

- Fixed TR01J02646. Performance issues with cairo version 1.12.
-----------------------------------------------------------


However, the current cairo code contains this
(http://cgit.freedesktop.org/cairo/tree/src/cairo-xlib-display.c
around line 300):
-----------------------------------------------------------
if (VendorRelease (dpy) >= 60700000) {
   if (VendorRelease (dpy) < 70000000)
display->buggy_repeat = TRUE;
}
-----------------------------------------------------------

As NX is presenting itself as 70000000 the condition is false already
and changing the version to 70100000 would not change the cairo
behaviour here.

BTW: Xorg 6.9 and 7.0 are the same code. 7.0 has just been
restructured completely and adapted to automake.

Uli

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