[Bug 4595] X Error - BadMatch (X_SetClipRectangles)

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=4595





------- Additional Comments From jave27 at gmail.com  2006-17-02 10:05 -------
I managed to get it to work by changing the last parameter in clipping.c from
"YXBanded" to "Unsorted", but Alexandre Julliard says that we need to keep the
YXBanded status:  

http://www.winehq.org/pipermail/wine-devel/2006-February/044976.html

He also referred to the code in dlls/x11drv/region.c as the reason for that.

I haven't noticed any strange screen artifacts by changing it to Unsorted, but
it's not the "correct" method.  Here's the Xlib progamming manual on the topic:

http://tronche.com/gui/x/xlib/GC/convenience-functions/XSetClipRectangles.html

Here's what it has to say on the last argument about clipping rectangle sorting:

   "If known by the client, ordering relations on the rectangles can
be specified with the ordering argument. This may provide faster
operation by the server. If an incorrect ordering is specified, the X
server may generate a BadMatch error, but it is not required to do so.
If no error is generated, the graphics results are undefined. Unsorted
means the rectangles are in arbitrary order. YSorted means that the
rectangles are nondecreasing in their Y origin. YXSorted additionally
constrains YSorted order in that all rectangles with an equal Y origin
are nondecreasing in their X origin. YXBanded additionally constrains
YXSorted by requiring that, for every possible Y scanline, all
rectangles that include that scanline have an identical Y origins and
Y extents."

So, we need to figure out exactly why that parameter is crashing this app.

I'll attach some logs, too.


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