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On 1/27/23 13:55 Lukas Lang wrote:
I am encountering an issue with maximizing/restoring Windows that
contain a Fl_Gl_Window: It seems the Fl_Gl_Window is not properly
redrawn when the Window changes to/from a maximized state. As a
demonstration, I recorded the behavior of the OpenGL3test.cxx example
on my Ubuntu 20.04 system:
I just tried the demo on my Linux Mint 20 which is based on Ubuntu 20.04
and it works as expected for maximizing and restoring (and manually
resizing as well). I tried both X11 and Wayland backends, both work fine.
I have no idea why it doesn't work on your (Lukas') system. Maybe an
issue with the OpenGL driver? What graphics adapter do you have, and can
you maybe change the graphics driver or some optimization level?
Other questions:
- which (exact) FLTK version are you using (download version, Git
revision,...)
- which desktop are you using? Is it a Wayland enabled desktop, or is
it pure X11?
- if the former (Wayland), can you run the demo with the X11 backend
(FLTK 1.4 current)?
The latter would be something like
$ FLTK_BACKEND=x11 ./OpenGL3test
(replace x11 with wayland to use the Wayland backend if this is enabled
in your FLTK 1.4 build).
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