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X11 + OpenGL window resizing issues (lemmy.world)
submitted 5 months ago by ZILtoid1991@lemmy.world to c/learn_programming@programming.dev
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When resizing an X11 window with OpenGL content, the image becomes garbled and certain parts of the window, usually at the parts that wasn't originally part of the initial framebuffer.

I couldn't find any documentation on if I supposed to call some extra functions when the window is being resized or not. I otherwise process that even as a system event, so it can be further processed by the program using my API.

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[-] ZILtoid1991@lemmy.world 1 points 5 months ago

I have tge same issue on at least two working distros, and had similar issues on previous ones I used. Other programs don't have this issue, only mine, when resizing. I don't know if I should call some extra functions, since most documentation I could get is pretty much "just use some existing solution".

[-] orclev@lemmy.world 1 points 5 months ago

This is a wild guess but you probably need to rerender the framebuffer when you get the resize event. I'd expect most libraries/frameworks/engines would take care of that for you, but if you've rolled your own using the base X11 and OpenGL libraries you might need to set that up. X11 has a lot of strange quirks due to its network centric design.

this post was submitted on 08 Jun 2024
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