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XboxDev / nxdk

The cross-platform, open-source SDK to develop for original Xbox: *new* xdk
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"NVIDIA Cg compiler" in README should potentially warn about support status #316

Open JayFoxRox opened 4 years ago

JayFoxRox commented 4 years ago

NVIDIA Cg compiler has not been supported since 2012. It is a closed-source / proprietary binary for a limited number of CPUs and operating-systems. It will eventually stop working and an open-source replacement will be unlikely.

For other projects the "Credits" section lists the license, but for Cg compiler it doesn't warn about this. Saying that it's a "(proprietary / discontinued by NVIDIA)" with a link to an issue or wiki article that explains alternatives could be an option.

DobaMuffin commented 3 years ago

Actually it seems Nvidia did open source the Cg compiler code. https://web.archive.org/web/20090803133658/http://developer.nvidia.com/object/cg_compiler_code.html

It could be used to fix any problems that occur if it ever stops working properly.

JayFoxRox commented 3 years ago

it seems Nvidia did open source the Cg compiler code

This was already known to us, but turned out to be pretty useless:

This release provides the source code for the Cg compiler (cgc.exe) with a "generic" profile, which does some minimal semantic checks and prints out a tree representation of the code

So they only open-sourced a "generic" profile which doesn't help much for compiling for nv2a.

I consider it too much work to implement a high level shader compiler, so I don't care - I simply write my VP and RC in assembly.