glFlush

GLFLUSH(3G)							  GLFLUSH(3G)



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 com-
       mands 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.

ERRORS
       GL_INVALID_OPERATION  is	 generated if glFlush is executed between the
       execution of glBegin and the corresponding execution of glEnd.

SEE ALSO
       glFinish(3G)



								  GLFLUSH(3G)