minmax(3G)

NAME
     minmax -  modifies pixel transfers to compute the minimum and maximum
     pixel values

C SPECIFICATION
     void minmax(unsigned long op, unsigned long value)

PARAMETERS
     op   one of the symbolic constants:
          (parameters that affect lrectread, lrectwrite, rectcopy pixel
          transfers)
          MINMAX_ENABLE enables the computaton of minimum and maximum pixels
          in lrectread, lrectwrite and rectcopy pixel transfers. Value is
          ignored.
          MINMAX_DISABLE disables the collection of minmax data.
          MINMAX_INIT initializes the minmax data.

     value
          is ignored.

DESCRIPTION
     gl_minmax allows enabling and disabling of collection of minmax data on a
     per component basis during pixel transfer operations (e.g., rectcopy,
     lrectread, and lrectwrite). When minmax is enabled, the destination of
     the pixel transfer is unaffected.  Enabling or disabling minmax do not
     reset previously accumulated minmax values, instead, the minmax values
     are initialized by MINMAX_INIT by setting the minimum to positive
     infinity and maximum by negative infinity.

SEE ALSO
     gethistogram histogram getminmax pixeltransfer pixelmap pixmode

NOTES
     minmax only works on RealityEngine systems running 5.0.1 or greater.