Collabora Still Investing In "Zink" For OpenGL Over Vulkan, But Back To GL 2.1

Zink is the year-old project implementing OpenGL over Vulkan using Mesa/Gallium3D infrastructure. While Zink had been making some good progress by developer Erik Faye-Lund of Collabora, he went back to rewriting some core pieces of Zink to address some design defects. In the process of this rewrite, Zink is currently back to OpenGL 2.1 era support over Vulkan...