GLFLUSH(3G) UNIX Programmer's Manual 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 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
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 exe-
cution of glEnd.
SEE ALSO
glFinish(3G)
MirBSD #10-current Printed 2021-12-07 1