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openGL & Thread

Started by flagadajones Aug 28, 2001 at 10:07 AM 2 replies 550+ views

Original Post

Aug 28, 2001 at 10:07 AM

i have a problem when i try to generate display lists in a thread.glGenLists(..) return GL_INVALID_OPERATION. i have a OGL manager in a thread and many function use OGL in an other thread. how can i resole this problem? possibility to change the active thread?.. i use VC++6 on W2k.

Pauly

Aug 28, 2001 at 10:46 AM

Don''t quote me on this, but you may need to use wglMakeCurrent and supply a handle to the OpenGL surface to get it drawing across different threads. Means you can''t use glut

Paul Groves
pauls opengl page

flagadajones

Aug 29, 2001 at 8:29 AM

we are in thread2.
it is possible to change the active thread(go to thread1) for the execution of one instruction and come back in thread2?

Pauly

Aug 29, 2001 at 9:56 AM

Yeah I believe it is - although not advised. Think about it, the timeliness of the threads isn't concrete - you're not sure which function will complete first (worst case; It might not complete at all) and I'll bet calling wglMakeCurrent too often is expensive...

Paul Groves
pauls opengl page

Edited by - Pauly on August 29, 2001 10:57:18 AM

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