'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_VideoColorCMYK2JFIFYCCK444 3MLIB "23 May 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_VideoColorCMYK2JFIFYCCK444 \- CMYK to JFIF YCbCr color conversion
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_VideoColorCMYK2JFIFYCCK444\fR(\fBmlib_u8 *\fR\fIy\fR, \fBmlib_u8 *\fR\fIcb\fR,
     \fBmlib_u8 *\fR\fIcr\fR, \fBmlib_u8 *\fR\fIk\fR, \fBconst mlib_u8 *\fR\fIcmyk\fR, \fBmlib_s32\fR \fIn\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_VideoColorCMYK2JFIFYCCK444()\fR function performs color space conversion from CMYK to YCbCrK when used in the JPEG File Interchange Format (JFIF).
.sp
.LP
The following equation is used:
.sp
.in +2
.nf
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
.fi
.in -2

.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIy\fR\fR
.ad
.RS 8n
.rt  
Pointer to destination Y component row. y must be 8-byte aligned.
.RE

.sp
.ne 2
.mk
.na
\fB\fIcb\fR\fR
.ad
.RS 8n
.rt  
Pointer to destination Cb component row. cb must be 8-byte aligned.
.RE

.sp
.ne 2
.mk
.na
\fB\fIcr\fR\fR
.ad
.RS 8n
.rt  
Pointer to destination Cr component row. cr must be 8-byte aligned.
.RE

.sp
.ne 2
.mk
.na
\fB\fIk\fR\fR
.ad
.RS 8n
.rt  
Pointer to destination K component row. k must be 8-byte aligned.
.RE

.sp
.ne 2
.mk
.na
\fB\fIcmyk\fR\fR
.ad
.RS 8n
.rt  
Pointer to source CMYK multi-component row. cmyk must be 8-byte aligned.
.RE

.sp
.ne 2
.mk
.na
\fB\fIn\fR\fR
.ad
.RS 8n
.rt  
Length of Y,Cb,Cr, and K component rows. The length of the CMYK multi-component row must be 4*n.
.RE

.SH RETURN VALUES
.sp
.LP
The function returns \fBMLIB_SUCCESS\fR if successful. Otherwise it returns \fBMLIB_FAILURE\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmlib_VideoColorJFIFYCCK2CMYK444\fR(3MLIB), \fBattributes\fR(5)