[massifist]

I thought I remember reading that there is some relation (or inspiration) from an older X11 toolkit called xforms. Which might also be of interest to someone.

I've been redoing some old projects in FTLK recently so this sparked my interest. And I just like delving into the history of things.

[mhd]

If I remember correctly, both FLTK and XForms have a commmon "ancestor" in the Forms library for SGI (pre-OpenGL days).

[p_l]

FLTK history explicitly mentions rewriting from libGL heavy code to pure X11 because of the differences in how useful GL was outside Xsgi[1]

[1] a quick example is how IRIX vector icons are actually serialised IRIX GL display lists