I'd be very interested in seeing your code, hacky or not.  We were
actually just discussing this on this list and on the devel list at
xfree86.org.  David Dawes said he has some preliminary work for setting
up multiple viewports into a single framebuffer.  Sven Luther and
myself, among others, would be interested in developing and extending
this support.

Alex


--------------------------------

I am pleased to report that thanks to the guidance Jens Owens gave in a
previous message, I have made 3D work on two heads simultaneously
(IIRC,
the ATI Windows XP drivers didn't do this).  I have not provided a diff
because it is quite a hack and very system specific, at the moment. 
Effectively, I forced the virtual size to be 2048x768, hacked the
RADEONDoAdjustFrame() function to fix views as I wanted them, used the
default cloning stuff to setup the second monitor, and removed all the
conditionals that were preventing dual-head+DRI from working.  I had to
enable Xinerama (even though I have only one screen in the server
setup)
in the config file; otherwise, the desktop would end at 1024 instead of
2048.  The problem I mentioned in a previous post -- not enough memory
for direct rendering w/ two screens -- was solved when I set it to 16
bpp.  Does anyone have any ideas for a more elegant implementation of
this functionality, especially where the config file is concerned? 
This
is the first real code I have done in the Xserver and any input would
be
appreciated.

--Jonathan Thambidurai

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