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GLFLUSH(3G)				  OpenGL Manual 			      GLFLUSH(3G)

       glFlush - force execution of GL commands in finite time

       void glFlush(void);

       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.

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


       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.


opengl.org				    06/10/2014				      GLFLUSH(3G)
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