iflColorModelChans(3)		     Image Format Library C++ Reference	Manual

NAME    [Toc]    [Back]

     iflColorModelChans, iflColorModelHasAlpha,	iflColorModelFromChans - color
     model utilities

SYNOPSIS    [Toc]    [Back]

     #include <ifl/iflColor.h>

     int iflColorModelChans(iflColorModel cm)
     int iflColorModelHasAlpha(iflColorModel cm)
     iflColorModel iflColorModelFromChans(int nc)

DESCRIPTION    [Toc]    [Back]

     The iflColorModelChans() function is provided to return the number	of
     channels associated with a	color model; it	is standalone and is not a
     member function of	any object.  Given a color model cm, this function
     returns the number	of channels associated with it.	For example, for the
     iflRGB color model, a value of 3 will be returned;	for the	iflMinWhite
     color model a value of 1 will be returned.	A value	of zero	is returned if
     the color model is	iflMultiSpectral.

     The iflColorModelHasAlpha() function returns TRUE if the color model
     specifed by cm has	an alpha component.

     The iflColorModelFromChans() function return a best guess at a color
     model that	matches	the number of channels specified by nc.	 The return
     value as a	function of the	number of channels is:

	  channels    color model

	  1	      iflLuminance

	  2	      iflLuminanceAlpha

	  3	      iflRGB

	  4	      iflRGBA

	  other	      iflMultiSpectral


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