#463 Texture filtering does not work in 16bpp

Rendering Error
open
nobody
ATI OpenGL (71)
5
2002-08-19
2002-08-19
No

There is a much difference in scenes rendered at 16bpp
modes and 32bpp modes. In the first case texture
filtering does not work (in the second is OK). Here are
some screenshots to demonstrate problem:

16bpp:
http://jedwab.net.pl/~jerzy/rtcw/R7500/trenches16.ppm.jpeg
http://jedwab.net.pl/~jerzy/rtcw/R7500/stairs16.ppm.jpeg
http://jedwab.net.pl/~jerzy/rtcw/R7500/warroom16.ppm.jpeg

And same scenery in 32bpp:
http://jedwab.net.pl/~jerzy/rtcw/R7500/trenches32.ppm.jpeg
http://jedwab.net.pl/~jerzy/rtcw/R7500/stairs32.ppm.jpeg
http://jedwab.net.pl/~jerzy/rtcw/R7500/warroom32.ppm.jpeg

You should note especially wall textures. There are
also strange colors (noticable on grass) but I think
that's related. I'm using Radeon 7500 QW.
Tested on two engines: "Return to Castle Wolfenstein"
and "Half-Life".

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