minmax(3G)							    minmax(3G)

NAME    [Toc]    [Back]

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

C SPECIFICATION    [Toc]    [Back]

     void minmax(unsigned long op, unsigned long value)

PARAMETERS    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     gethistogram histogram getminmax pixeltransfer pixelmap pixmode

NOTES    [Toc]    [Back]

     minmax only works on RealityEngine	systems	running	5.0.1 or greater.


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