HiDPI/4K screen support

[hellocatfood]

I'm running 0.6.6 on Ubuntu 23.04 on a Dell XPS 15 machine with a 3840 x 2600 screen. When I open Mosaic the interface and all of the menus are small and almost unreadable.

Can support be added for high resolution screens?

[d3cod3]

Hi, i'm testing some stuff for now, imgui still have some quirks with this issue...

could you please test this app:

HiDPI-test.zip

and send me a screenshot?

Is just an empty OF app container with GLFW calls to obtain info about screen resolution scaling

For example, this is my result:

It's an appimage, just open it and the window will appear

[RKelln]

On my ubuntu 22.04 laptop with 2256x1504:

Monitor content scale: 1.25
Pixel scale: 1

Note: I have Gnome Large text accessibility on (to help with various text too small issues);

Here is with it off:

Monitor content scale: 1
Pixel scale: 1

Font size is large in both cases. I generally run with no scaling and Large Text as that seems to work best for most apps.

Here is with fraction 125% scaling and no large text:

Monitor content scale: 2
Pixel scale: 1

Ran into some problems installing the latest Mosiac so can't provide a screenshot of Mosiac atm and unfortunately my 4k monitor just died so can't test that. :/

[d3cod3]

Thanks for the info, i'll write an empty app with an imgui menu, to simulate the Mosaic menu, with some code to fix the HiDPI stuff, then i'll share it here for you to test it, and everyone with 4k + monitors, and with the results i'll publish a new Mosaic release with this issue fixed!

Soon the testing app...