opensolaris man page for mlib_videocolorjfifycck2cmyk444

mlib_VideoColorJFIFYCCK2CMYK444(3MLIB)			    mediaLib Library Functions			    mlib_VideoColorJFIFYCCK2CMYK444(3MLIB)

NAME
       mlib_VideoColorJFIFYCCK2CMYK444 - JFIF YCbCr to CMYK color conversion

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

       mlib_status mlib_VideoColorJFIFYCCK2CMYK444(mlib_u8 *cmyk,
	    const mlib_u8 *y, const mlib_u8 *cb,
	    const mlib_u8 *cr, const mlib_u8 *k,
	    mlib_s32 n);

DESCRIPTION
       The  mlib_VideoColorJFIFYCCK2CMYK444()  function performs color space conversion from YCbCrK to CMYK when used in the JPEG File Interchange
       Format (JFIF).

       The following equation is used:

	 R = Y			      + 1.40200 * (Cr - 128)
	 G = Y - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128)
	 B = Y + 1.77200 * (Cb - 128)
	 C = (255 - R)
	 M = (255 - G)
	 Y = (255 - B)
	 K = K

PARAMETERS
       The function takes the following arguments:

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

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

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

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

       k       Pointer to source K component row. k 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_VideoColorCMYK2JFIFYCCK444(3MLIB), attributes(5)

SunOS 5.11							    23 May 2007 			    mlib_VideoColorJFIFYCCK2CMYK444(3MLIB)