Reverting potentially plagiarized code. The developer team did not sign off on this commit.

This reverts merge request !17

These formats are unsupported by mobile GPUs so they need to be emulated in shaders instead.

This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.

Thanks for everything!

Put all varyings into a single std::bitset with helpers to access it.

Implement passthrough geometry shaders using host's.