[Linux] fixing glCompressedTexImage2D failed (GL_INVALID_EN

[Agi]

The game seems to use a texture packaging format called S3TC, and if you get the following error message it's because your system doesn't support it.

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[string "CustomMaterials.lua"]:0: GL error: glCompressedTexImage2D failed (GL_INVALID_ENUM 0x0500)
stack traceback:
[C]: in function 'load'
[string "CustomMaterials.lua"]: in function 'create'
[string "Grimrock.lua"]: in function 'init'
[string "Grimrock.lua"]: in main chunk
[C]: in function 'require'
init.lua: in main chunk

This can be caused by two different issues. The first issue is that you do not have the relevant packages installed to support it. In fedora 16 you need to do the following to install the package:

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sudo yum install libtxc_dxtn

For newer distributions it should already be supported out of the box, but you might have to find a package for that library yourself.

If you have the relevant software installed, you might need to enable the support for it. This can be done by installing driconf and enabling it there.

[caseyweederman]

Xubuntu here. The package was called libtxc-dxtn-s2tc0 for me, so the command would be:
sudo apt-get install libtxc-dxtn-s2tc0
Thanks for the guidance!

[mattwilmott]

sudo yum install libtxc_dxtn

I can confirm this is required for Fedora 17 as well

[flugen]

Second the confirmation on Fedora 17. This is also with Nvidia optimus (using proprietary + bumblebee). I did need to enable s3tc using driconf though. I'm very happy it's finally native, as it wasn't working under wine for me.

[zaazz]

sudo zypper install libtxc_dxtn

Worked for openSUSE 12.3. Fixed Legend of Grimrock as well as Bastion. Thanks for this!