LabWpAj.c revision b4ee4795 
1
2/*
3 * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
4 * 	All Rights Reserved
5 *
6 * This file is a component of an X Window System-specific implementation
7 * of XCMS based on the TekColor Color Management System.  Permission is
8 * hereby granted to use, copy, modify, sell, and otherwise distribute this
9 * software and its documentation for any purpose and without fee, provided
10 * that this copyright, permission, and disclaimer notice is reproduced in
11 * all copies of this software and in supporting documentation.  TekColor
12 * is a trademark of Tektronix, Inc.
13 *
14 * Tektronix makes no representation about the suitability of this software
15 * for any purpose.  It is provided "as is" and with all faults.
16 *
17 * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
18 * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
19 * PARTICULAR PURPOSE.  IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
20 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
21 * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
22 * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
23 * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
24 *
25 *
26 *	NAME
27 *		CIELabWpAj.c
28 *
29 *	DESCRIPTION
30 *		This file contains routine(s) that support white point
31 *		adjustment of color specifications in the CIE L*a*b* color
32 *		space.
33 */
34
35#ifdef HAVE_CONFIG_H
36#include <config.h>
37#endif
38#include "Xlibint.h"
39#include "Xcmsint.h"
40#include "Cv.h"
41
42/*
43 *	EXTERNS
44 */
45
46
47/************************************************************************
48 *									*
49 *			 PUBLIC ROUTINES				*
50 *									*
51 ************************************************************************/
52
53/*
54 *	NAME
55 *		XcmsCIELabWhiteShiftColors
56 *
57 *	SYNOPSIS
58 */
59Status
60XcmsCIELabWhiteShiftColors(
61    XcmsCCC ccc,
62    XcmsColor *pWhitePtFrom,
63    XcmsColor *pWhitePtTo,
64    XcmsColorFormat destSpecFmt,
65    XcmsColor *pColors_in_out,
66    unsigned int nColors,
67    Bool *pCompressed)
68/*
69 *	DESCRIPTION
70 *		Adjust color specifications in XcmsColor structures for
71 *		differences in white points.
72 *
73 *	RETURNS
74 *		XcmsFailure if failed,
75 *		XcmsSuccess if succeeded without gamut compression,
76 *		XcmsSuccessWithCompression if succeeded with gamut
77 *			compression.
78 */
79{
80    if (pWhitePtFrom == NULL || pWhitePtTo == NULL || pColors_in_out == NULL) {
81	return(0);
82    }
83
84    /*
85     * Convert to CIELab using pWhitePtFrom
86     */
87    if (_XcmsConvertColorsWithWhitePt(ccc, pColors_in_out, pWhitePtFrom,
88	    nColors, XcmsCIELabFormat, pCompressed) == XcmsFailure) {
89	return(XcmsFailure);
90    }
91
92    /*
93     * Convert from CIELab to destSpecFmt using pWhitePtTo
94     */
95    return(_XcmsConvertColorsWithWhitePt(ccc, pColors_in_out,
96	pWhitePtTo, nColors, destSpecFmt, pCompressed));
97}
98