Comments on: Multi-thread OpenGL texture loading

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By: RedRofeStard

RedRofeStard — Sun, 08 Jan 2017 16:41:50 +0000

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By: AqD

AqD — Wed, 11 Feb 2015 19:45:30 +0000

I’m attempting to do it with JOGL on latest nVIDIA cards but multiple threads on shared contexts along create weird problems such as unusually high CPU usage (sluggish mouse, PC nearly freezes). I never had such problem when shared contexts are only accessed by a single thread.

And nothing from loader thread could be rendered, no error :*

By: gman

gman — Fri, 10 Oct 2014 09:15:44 +0000

Don’t do it! Or at least that’s my suggestion. Most GL drivers are not well tested with multiple threads and you’ll likely have support nightmares if you ever ship something.

I’d suggest just doing graphics on 1 thread. If you want to upload something preempt whatever you were doing and upload. If you’re loading a texture load from disk and/or decompress on a separate thread and when done pass that info to the one thread talkng to GL.

Note: You can still have multiple GL contexts so you don’t have to track GL state but I’ve found trying to actually use GL directly with multiple threads is just adding your pain.

You’re not gaining anything anyway by using multiple threads as ultimately the driver itself is not multi-threaded.

Also note that even multiple context often don’t work. Especially on mobile. There are no tests by driver makes for multiple contexts threaded or not. Seriously.

By: Drifter

Drifter — Wed, 13 Aug 2014 09:26:04 +0000

I couldn’t make this work on glx or wxwidgets. Can somebody provide a working example? Thanks!

By: Yaro

Yaro — Wed, 05 Feb 2014 16:42:41 +0000

I’m a little confused. You talk about there being a way to do this in an X11/OS X environment, then you proceed to show us just another way to do it in Windows, which is not OS X nor uses X11? This makes no sense to me. I thought the purpose of this article was showing us how to do this on platforms like Linux or Mac OS X.

By: matt

matt — Tue, 15 Jan 2013 01:57:44 +0000

Thanks for solving my texture corruption problem!