fglGenAsyncMarkersSGIX(3G) OpenGL Reference fglGenAsyncMarkersSGIX(3G)NAMEfglGenAsyncMarkersSGIX - reserve markers for tracking asynchronous
commands
FORTRAN SPECIFICATION
INTEGER*4 fglGenAsyncMarkersSGIX( INTEGER*4 range )
PARAMETERS
range Specifies the number of contiguous marker values to reserve.
DESCRIPTIONfglGenAsyncMarkersSGIX 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.
fglGenAsyncMarkersSGIX returns an integer n such that the markers n, n+1,
n+2, ..., n+s-1 are not previously reserved or in use, where s is the
value of range. fglGenAsyncMarkersSGIX also records that each of the
markers in the returned range is reserved.
Note that the marker name space is never shared across contexts, as the
name spaces for texture objects and display lists may be.
ERRORS
GL_INVALID_OPERATION is generated if fglGenAsyncMarkersSGIX 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,
fglIsAsyncMarkerSGIX, fglPollAsyncSGIX, fglDrawPixels, fglGet,
fglReadPixels, fglTexImage1D, fglTexImage2D, fglTexImage3D,
fglTexSubImage1D, fglTexSubImage2D, fglTexSubImage3D
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