glFlush
[New
- Windows 95, OEM Service Release 2]
The glFlush
function forces execution of OpenGL functions in finite time.
void glFlush(
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void |
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); |
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Remarks
Different
OpenGL implementations buffer commands in several different locations,
including network buffers and the graphics accelerator itself. The glFlush
function empties all 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
OpenGL program might be executed over a network, or on an accelerator that
buffers commands, be sure to call glFlush in all programs whenever they
require that all of their previously issued commands have been completed. For
example, call glFlush before waiting for user input that depends on the
generated image.
The glFlush
function can return at any time. It does not wait until the execution of all
previously issued OpenGL functions is complete.
Error Codes
The following
are the error codes generated and their conditions.
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Error
Code |
Condition |
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GL_INVALID_OPERATION
|
glFlush was called between a call to glBegin and the
corresponding call to glEnd. |
See Also