NAME
glFlush
- force execution of GL commands in finite time
C SPECIFICATION
void ggllFFlluusshh( void )
DESCRIPTION
Different GL implementations buffer commands in several different locations,
including network buffers and the graphics accelerator itself.
ggllFFlluusshh 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 ggllFFlluusshh whenever they count on having
all of their previously issued commands completed.
For example,
call ggllFFlluusshh before waiting for user input that depends on
the generated image.
NOTES
ggllFFlluusshh can return at any time.
It does not wait until the execution of all previously
issued GL commands is complete.
ERRORS
GGLL__IINNVVAALLIIDD__OOPPEERRAATTIIOONN is generated if ggllFFlluusshh
is executed between the execution of ggllBBeeggiinn
and the corresponding execution of ggllEEnndd.
SEE ALSO
ggllFFiinniisshh((33GG))