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
image.
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.
glFinish(3G)
MirOS BSD #10-current Printed 20.2.2012 1
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