System Environment:
--------------------------
--Platform: FC6
--Xf86_video_intel:6f92200db39a790c95c1fac64baf0bd41a70e481 
--Mesa:e2ca788ae700aae75bf8d024c1374c38cc5574f9 
--DRM:f1a99ddc14ebca303f20b6c23bd289fc887243ae
--Kernel:2.6.22

Bug detailed description:
--------------------------
This issue doesn't happen on 965 platform

when depth range is [n, f], the mapping of z values from normalized device coordinates to window coordinates should be calculated as following:
Zw = ((f - n) / 2)Zd + ((n + f) / 2), Zd is normalized device coordinate of a pixel

The issue happens when set depth range to [0.0, 1.0],
set the x, y, z coordinate with glRasterPos3f, then render a pixel with glBitmap
but depth component is not correct

Reproduce steps:
----------------
start X
compile and run the attached test case


Current result:
----------------
the depth component is not correct

Expected result:
----------------
the depth component should be correct