iflColorModelChans(3) Image Format Library C++ Reference Manual
NAME
iflColorModelChans, iflColorModelHasAlpha, iflColorModelFromChans - color
model utilities
SYNOPSIS
#include <ifl/iflColor.h>
int iflColorModelChans(iflColorModel cm)
int iflColorModelHasAlpha(iflColorModel cm)
iflColorModel iflColorModelFromChans(int nc)
DESCRIPTION
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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