Announcing clean-er re-implementation of original Valve's GUI library from Half-Life 1 under the work title `freevgui`. I'm working on it since last year in my free time of free time of free time. :)

This implementation is intended to be used within Xash3D FWGS as a drop-in FOSS and cross-platform alternative to the proprietary vgui.dll library, but potentially can be used as a replacement in Half-Life mods as well, as it's both API and ABI compatible.

Unlike Nagist's implementation, this library specifically hasn't been derived from HLSDK code, and every line of code has been carefully restored from DWARF debug information and decompilation using Ghidra.

Source code will be published as soon as I finish implementing the controls library and when I decide on licensing. For now, it has dependency on 3-clause BSD licensed C++ templates library, and C utilities library from Xash3D FWGS which is GPLv2 licensed. I'll probably drop GPL dependency to allow it included in Half-Life mods as a bug fixed replacement of original vgui code, when it will have bug fixes in the first place.