overview of OpenGL
the OpenGL product
Chapter 1 13
calls must be restricted to a single thread, which remains the same
thread for the duration of the process. This is not the same as OpenGL
calls being made in one thread at a time. Other threads can be used for
computations, etc.
Using OpenGL graphics in a Kernel threaded application requires that
the application link with libpthread.sl (not the archived version,
libpthread.a).
OpenGL libraries are not cancel safe or fork safe.
A context can only be made current in the dedicated graphics thread.
multiple graphics threads support in June, 2000 11. ACE OpenGL
Starting with the June, 2000 11.ACE OpenGL release, OpenGL will
Support Level 2 threads. This means HP OpenGL can be used in
threaded applications, and more than one thread can use OpenGL.
Using OpenGL graphics in a Kernel threaded application requires that
the application link with libpthread.sl (not the archived version,
libpthread.a).
OpenGL libraries are not cancel safe or fork safe.
A given context can only be current in one thread at a time.
additional documentation For more information on using threads, see
the following documentation:
•The devresource.hp.com web site (search for “Threads and
Multiprocessing” )
• The OpenGL Programming Guide
• The OpenGL Reference Manual
• Threadtime by S. Norton and M. Dipasquale
64-bit programming
Starting with the HP-UX 11.0 Additional Core Enhancements (ACE)
(November, 1999) release, HP OpenGL will support 64-bit programming.
Applications using 64-bit computing are supported on SPUs with 64-bit
capabilities only; they are not supported on 32-bit SPUs.
For information on porting your application to take advantage of 64-bit
capabilities, see the devresource.hp.com web site. Search for “64-bit
Computing.”
OGLImp.book Page 13 Tuesday, February 14, 2006 9:15 AM
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