glFinish
NAME
glFinish - block until all GL execution is complete
C SPECIFICATION
void glFinish(void)
DESCRIPTION
glFinish does not return until the effects of all previously
called GL commands are complete. Such effects include all
changes to GL state, all changes to connection state, and
all changes to the frame buffer contents.
NOTES
glFinish requires a round trip to the server.
ERRORS
GL_INVALID_OPERATION is generated if glFinish is executed
between the execution of glBegin and the
corresponding execution of glEnd.
SEE ALSO
glFlush