dicroce dicroce - 6 months ago 30
Linux Question

How to query X11 display resolution?

It seems like an simple problem, but I can't find the answer: How do you query (via X11) what monitors exist and their resolutions?

Answer

Check out display macros and screen macros from the Xlib manual.

Specifically:

  • From the first link: ScreenCount(), ScreenOfDisplay()
  • From the second link: WidthOfScreen(), HeightOfScreen()
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