fglFlush(3G)

NAME
     fglFlush - force execution of GL commands in finite time


FORTRAN SPECIFICATION
     SUBROUTINE fglFlush( )


DESCRIPTION
     Different GL implementations buffer commands in several different
     locations, including network buffers and the graphics accelerator itself.
     fglFlush 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 fglFlush
     whenever they count on having all of their previously issued commands
     completed.  For example, call fglFlush before waiting for user input that
     depends on the generated image.

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

ERRORS
     GL_INVALID_OPERATION is generated if fglFlush is executed between the
     execution of fglBegin and the corresponding execution of fglEnd.


SEE ALSO
     fglFinish