[Bug 13080] Demo program does not display text correctly with R200, but does with R300

[<bug...@fr...>]

http://bugs.freedesktop.org/show_bug.cgi?id=13080





------- Comment #17 from sr...@tu...  2007-11-12 10:35 PST -------
(In reply to comment #16)
> Yeah, the depth buffer on rv100 is not tiled until you enable hyperz. This is
> something that was never fixed in mesa's pixel span routines, these assume that
> the depth buffer is always tiled.
Oops. I thought that was fixed ages ago. But looks like it's not...
In fact this looks pretty strange, in the dri driver depthHasSurface is set
according to ddx version (which is ok) and according to RADEON_CHIPSET_TCL -
this isn't the same for all radeon families (at least ddx doesn't set it up
like that, maybe fallout from merging r100/r200/r300 radeon_screen.c), so would
break r200/r300 igps.
But even for r100, this sounds wrong as it only decides if we're using software
z-buffer de-tiling or not - for chips which really don't use z tiling we should
just pretend we have a surface set up for tiling anyway since we can just read
it directly without address translation...
Chris, does it work correctly if you remove the additional test for
RADEON_CHIPSET_TCL in that screen->depthHasSurface assignment in
radeon_screen.c?


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