Some games (such as World of Warcraft) need S3TC texture support, and so will crash if the OpenGL S3TC extensions are not advertised. Currently, the only way to make Gallium advertise the S3TC extensions is to load the IP-encumbered libtxc_dxtn library.
WoW can run successfully using the r300c driver without the libtxc_dxtn, provided the force_s3tc_enable option is used. (There are some issues with corrupt textures, although some of these issues might be caused e.g. by r300c not supporting texture cache regions. However, my point is that WoW doesn't crash instantly with a null pointer exception if the S3TC extensions are available.)
Agree. Some game are considering forcing S3TC this way (e.g. 0ad) and this won't work with gallium drivers. I see also very few options with driconf with gallium drivers, maybe other than force_s3tc_enable should be made available.
Moving to mesa core since this also affects softpipe.
Is this still an issue ?
(In reply to comment #2)
> Is this still an issue ?
This is fixed by commits 95739f19c and 860c51d82711 in master for all Gallium drivers using u_format. I've also pushed them to the 7.11 branch.