BGFX is a general-purpose 3D graphics engine, not a GUI nor vector graphics framework.
Nanovg is an awesome vector graphics library, but has limitations. (1) no ClearType, I fixed in my fork: https://github.com/Const-me/nanovg (2) The only way to get AA is hardware MSAA, unfortunately many popular platforms like Raspberry Pi don’t have good enough hardware to do it fast enough. Nanogui is built on top of Nanovg, shares the limitations.
I agree with the OP that Cairo and Skia are the only viable ones for Linux.
It’s sad because Windows has Direct2D for decades now (introduced in Vista), and unlike 2006, now in 2021 Linux actually has all the lower-level pieces to implement a comparable equivalent. Here’s a proof of concept: https://github.com/Const-me/Vrmac#vector-graphics-engine
Nanovg is an awesome vector graphics library, but has limitations. (1) no ClearType, I fixed in my fork: https://github.com/Const-me/nanovg (2) The only way to get AA is hardware MSAA, unfortunately many popular platforms like Raspberry Pi don’t have good enough hardware to do it fast enough. Nanogui is built on top of Nanovg, shares the limitations.
I agree with the OP that Cairo and Skia are the only viable ones for Linux.
It’s sad because Windows has Direct2D for decades now (introduced in Vista), and unlike 2006, now in 2021 Linux actually has all the lower-level pieces to implement a comparable equivalent. Here’s a proof of concept: https://github.com/Const-me/Vrmac#vector-graphics-engine