Is there a portable OpenGL UI library (buttons, lists, windows, drop down, etc.)?

Question

I am looking for an OpenGL user interface library such as WxWidgets, but OS independent.

It would have to provide callbacks for user input, as it depends on the OS.

If something like this doesn't exist yet (which I doubt because most games have most of the basic interface elements) is there any OpenGL HTML / CSS rendering?

Answer 1

Found another question:

https://stackoverflow.com/questions/211018/what-is-the-best-free-cross-platform-opengl-gui-library-for-a-video-game

CEGUI seems to be the answer.

Answer 2

FLTK, GTK + QT OpenGL . QT, , OpenGL. , - , GTK , .

OTK Google OpenGL.

, Cairo OpenGL, , , GTK +.