glXQueryChannelDeltasSGIX(3G)				OpenGL Reference - GLX

NAME    [Toc]    [Back]

     glXQueryChannelDeltasSGIX - returns the precision constraints for any
     frame buffer area that is to be resized to	match the video	resolution

C SPECIFICATION    [Toc]    [Back]

     int glXQueryChannelDeltasSGIX( Display *dpy,
				    int	screen,
				    int	channel,
				    int	*dx,
				    int	*dy,
				    int	*dw,
				    int	*dh )

PARAMETERS    [Toc]    [Back]

     dpy      Specifies	the connection to the X	server.

     screen   Specifies	the screen of the X server.

     channel  Specifies	the video channel number.

     dx, dy, dw, dh
	      Precision	deltas for the origin and size of the area specified
	      by glXChannelRectSGIX

DESCRIPTION    [Toc]    [Back]

     When glXChannelRectSGIX is	called,	the origin and size of the specified
     frame buffer area must be positive	integer	multiples of the associated
     values returned by	glXQueryChannelDeltasSGIX.  Note that dx, dy, dw and
     dh	may be greater than one	due to hardware	constraints.

NOTES    [Toc]    [Back]

     glXQueryChannelDeltasSGIX is part of the SGIX_video_resize	extension.



MACHINE	DEPENDENCIES
     The SGIX_video_resize extension is	supported only on InfiniteReality
     systems.

SEE ALSO    [Toc]    [Back]

     glXBindChannelToWindowSGIX, glXChannelRectSGIX, glXQueryChannelRectSGIX


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