NAME

       glFlush - force execution of GL commands in finite time

C SPECIFICATION

       void glFlush(void);

DESCRIPTION

       Different GL implementations buffer commands in several different locations, including
       network buffers and the graphics accelerator itself.  glFlush empties all of these
       buffers, causing all issued commands to be executed as quickly as they are accepted by the
       actual rendering engine. Though this execution may not be completed in any particular time
       period, it does complete in finite time.

       Because any GL program might be executed over a network, or on an accelerator that buffers
       commands, all programs should call glFlush whenever they count on having all of their
       previously issued commands completed. For example, call glFlush before waiting for user
       input that depends on the generated image.

NOTES

       glFlush can return at any time. It does not wait until the execution of all previously
       issued GL commands is complete.

VERSION SUPPORT

       ┌─────────┬───────────────────────────────────────────────────────────────────────┐
       │         │                OpenGL Version                                         │
       ├─────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/        │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature  │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name     │     │     │     │     │     │     │     │     │     │     │     │     │
       ├─────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glFlush  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └─────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glFinish()

COPYRIGHT

       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This
       document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

COPYRIGHT

       Copyright © 1991-2006 Silicon Graphics, Inc.
       Copyright © 2010-2014 Khronos Group

[FIXME: source]                             07/22/2015                                GLFLUSH(3G)