glXQueryChannelDeltasSGIX(3G)

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


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


PARAMETERS
     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
     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
     glXQueryChannelDeltasSGIX is part of the SGIX_video_resize extension.



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


SEE ALSO
     glXBindChannelToWindowSGIX, glXChannelRectSGIX, glXQueryChannelRectSGIX