fglIsAsyncMarkerSGIX(3G) OpenGL Reference fglIsAsyncMarkerSGIX(3G)NAMEfglIsAsyncMarkerSGIX - determine if a marker is reserved or in use
FORTRAN SPECIFICATION
LOGICAL*1 fglIsAsyncMarkerSGIX( INTEGER*4 marker )
PARAMETERS
marker Specifies a potential value for a reserved or in-use marker.
DESCRIPTIONfglIsAsyncMarkerSGIX is part of the SGIX_async extension. This extension
provides a framework within which particular sets of OpenGL commands can
become "asynchronous" via specific further OpenGL extensions. Currently
the SGIX_async_pixel extension is the only such defined extension.
A marker for asynchronous commands is "in use" if it is the current value
of GL_ASYNC_MARKER_SGIX, or if it is associated with any asynchronous
command that has been issued but has not been queried using
fglFinishAsyncSGIX or fglPollAsyncSGIX. A marker may be "reserved" via
use of the fglGenAsyncMarkersSGIX command.
fglIsAsyncMarkerSGIX returns 1 if marker identifies a marker that is
currently in use or reserved; it returns 0 otherwise.
ERRORS
GL_INVALID_OPERATION is generated if fglIsAsyncMarkerSGIX is executed
between the execution of fglBegin and the corresponding execution of
fglEnd.
MACHINE DEPENDENCIES
The SGIX_async and SGIX_async_pixel extensions are implemented only on
Octane2 VPro systems.
SEE ALSO
fglAsyncMarkerSGIX, fglDeleteAsyncMarkersSGIX, fglFinishAsyncSGIX,
fglGenAsyncMarkersSGIX, fglPollAsyncSGIX, fglDrawPixels, fglGet,
fglReadPixels, fglTexImage1D, fglTexImage2D, fglTexImage3D,
fglTexSubImage1D, fglTexSubImage2D, fglTexSubImage3D
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