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Doubt in working with multi context application.

Started by Tsumuji Nov 24, 2006 at 12:29 PM 4 replies 1.9k views

Original Post

Nov 24, 2006 at 12:29 PM

Is possible pass the textures generated in one OpenGL context to another? I have tried here and was sucessfull in creating a multi context in separate threads application. So, I have 2 windows running in parallel each one with own openGL context. And is working. But I want to know if it is possible to pass texturess generated by thread 2, to thread 1, so I can exibit textures loaded from thread 2 in thread 1?

MagicScript

Nov 24, 2006 at 12:47 PM

Assuming that you're using Windows, you'll need to use wglShareLists on the two opengl resource contexts involved to be able to share things like textures between them.

Tsumuji

Nov 24, 2006 at 1:16 PM

hum, very good, but and in glX?

MagicScript

Nov 24, 2006 at 5:25 PM

Quote:
Original post by Tsumuji
hum, very good, but and in glX?

I unfortunately don't have any experience with glX, but after a little searching, it appears that the list sharing functionality happens in glXCreateContext function where the third parameter specifies, I suppose, the context of your other window. I am, however, guessing. Good luck.

Reference for glXCreateContext

Tsumuji

Nov 25, 2006 at 3:06 PM

Yeah, I discover that yesterday at night. You're right. You need ro pass the parameter at creatin time with glXCreateContext();
Thanks for the replies!

Tsumuji

Nov 25, 2006 at 6:44 PM

one more doubt:
When I call wglShareLists, I pass the first parameter as my current context(the main context), and the second, the one I want to get the textures generated from?

I tried here, but get lost with the original image. Only the secondary context can be seen in screen now, not the main context.

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