justin = { main feed , music , code , askjf , pubkey };
Ask Justin Frankel
No reasonable question unanswered since 2009!

Suggested topics: programming, music, sleep, coffee, etc.

Note: please do not ask questions about REAPER features, bugs or scheduling, use the forums instead.

Name: Ask: Human (enter yes):
[back to index] | [unreplied] | [replied] | [recent comments] | [all]
Question: Hey Justin, for my gui-library I need to prevent Retina-upscaling since I have my own scaling-engine. How do I turn off Retina on Retina computers? gfx.ext_retina=0?
Asked by Mespotine (176.6.145.x) on January 6 2025, 9:42pm
Reply on January 7 2025, 3:46am:
    gfx.ext_retina=1 on initialization. then, from that point on, you'd want to render with your own scaling, using gfx.ext_retina as the scalefactor. e.g. if it is 2.0, you should use fonts that are double the size, etc. does that make sense? and additionally, on Windows/linux, it will get set with the effective scaling.

Comments:
  • Posted by Mespotine (176.6.144.x) on January 7 2025, 7:45pm:
    So, if I understand correctly, it's not possible to turn Retina-support off? I basically just want to have on all systems the same behavior as on non-Retina systems.

  • Posted by Justin on January 7 2025, 9:24pm:
    If you set gfx.ext_retina=1 and then subsequently ignore it, on macOS retina displays everything will be tiny and high resolution. is that what you mean?

  • Posted by Mespotine (176.6.144.x) on January 7 2025, 9:39pm:
    Probably yes, will check this out. Thanks :)

  • Posted by Mespotine (176.6.142.x) on January 14 2025, 8:19pm:
    I have tested the approach and setting gfx.ext_retina=1 scales now properly. However, gfx.init() still blows up the window size by 2, so I need now a way to make the window half the size so it's scaled properly with my gui. And here's a problem: I can't find out, if Retina is active in the initial, non-deferred script-run, only in the first defer-cycle.

  • Posted by Mespotine (176.6.142.x) on January 14 2025, 8:20pm:
    My current approach is the following: In the initial run of the script, I set gfx.ext_retina=1. Then I open the window, which will be twice the size and therefore too big for my 1x-scaling, so I need to make it half the size. But only in the first defer-cycle, gfx.ext_retina is set to 2 which gives me a hint that Retina is active. However, I would have needed to know in the initial run as well, so I can make the window half the size right away, but I can do it only in the first defer-cycle, not in the initi

  • Posted by Mespotine (176.6.142.x) on January 14 2025, 8:21pm:
    ...not in the initial run of the script? If it's not possible, would it be possible to add some kind of hint? Or even better, setting gfx.ext_retina=-1 overrides all scaling of the window including gfx.init() as well?

  • Posted by Mespotine (176.6.142.x) on January 14 2025, 10:09pm:
    I found a way around the problem: I check after gfx.init() if gfx.w and gfx.h are bigger than expected and resize the window accordingly with another gfx.init().This probably does the trick.

  • Posted by Justin on January 23 2025, 11:01pm:
    that's probably what is needed -- thing is, on a multimonitor display, you won't know the retina/dpi until the window is displayed and positioned.

Comment:
    Your Name:   -- Site Owner's Name:  (for human-verification)

    Comment:
[back to index] | [unreplied] | [replied] | [recent comments] | [all]
Copyright 2025 Justin Frankel. | RSS