MirBSD manpage: glFlush(3)

GLFLUSH(3G)         UNIX Programmer's Manual          GLFLUSH(3G)


     glFlush - force execution of GL commands in finite time


     void glFlush( void )


     Different GL implementations buffer commands in several dif-
     ferent 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 pre-
     viously issued commands completed. For example, call glFlush
     before waiting for user input that depends on the generated


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


     GL_INVALID_OPERATION is generated if glFlush is executed
     between the execution of glBegin and the corresponding exe-
     cution of glEnd.



MirBSD #10-current     Printed 2021-12-07                       1

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