opensolaris man page for mlib_videocolorcmyk2jfifycck444

mlib_VideoColorCMYK2JFIFYCCK444(3MLIB)			    mediaLib Library Functions			    mlib_VideoColorCMYK2JFIFYCCK444(3MLIB)

NAME
       mlib_VideoColorCMYK2JFIFYCCK444 - CMYK to JFIF YCbCr color conversion

SYNOPSIS
       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_VideoColorCMYK2JFIFYCCK444(mlib_u8 *y, mlib_u8 *cb,
	    mlib_u8 *cr, mlib_u8 *k, const mlib_u8 *cmyk, mlib_s32 n);

DESCRIPTION
       The  mlib_VideoColorCMYK2JFIFYCCK444()  function performs color space conversion from CMYK to YCbCrK when used in the JPEG File Interchange
       Format (JFIF).

       The following equation is used:

	 R  = (255 - C)
	 G  = (255 - M)
	 B  = (255 - Y)
	 Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
	 Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B	+ 128
	 Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B	+ 128
	 K  = K

PARAMETERS
       The function takes the following arguments:

       y       Pointer to destination Y component row. y must be 8-byte aligned.

       cb      Pointer to destination Cb component row. cb must be 8-byte aligned.

       cr      Pointer to destination Cr component row. cr must be 8-byte aligned.

       k       Pointer to destination K component row. k must be 8-byte aligned.

       cmyk    Pointer to source CMYK multi-component row. cmyk must be 8-byte aligned.

       n       Length of Y,Cb,Cr, and K component rows. The length of the CMYK multi-component row must be 4*n.

RETURN VALUES
       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       mlib_VideoColorJFIFYCCK2CMYK444(3MLIB), attributes(5)

SunOS 5.11							    23 May 2007 			    mlib_VideoColorCMYK2JFIFYCCK444(3MLIB)