AddDIC.c revision 1ab64890 
1/* $Xorg: AddDIC.c,v 1.3 2000/08/17 19:44:29 cpqbld Exp $ */
2
3/*
4 * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
5 * 	All Rights Reserved
6 *
7 * This file is a component of an X Window System-specific implementation
8 * of Xcms based on the TekColor Color Management System.  Permission is
9 * hereby granted to use, copy, modify, sell, and otherwise distribute this
10 * software and its documentation for any purpose and without fee, provided
11 * that this copyright, permission, and disclaimer notice is reproduced in
12 * all copies of this software and in supporting documentation.  TekColor
13 * is a trademark of Tektronix, Inc.
14 *
15 * Tektronix makes no representation about the suitability of this software
16 * for any purpose.  It is provided "as is" and with all faults.
17 *
18 * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
19 * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE.  IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
21 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
22 * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
23 * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
24 * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
25 *
26 *
27 *	NAME
28 *		XcmsAddDIC.c
29 *
30 *	DESCRIPTION
31 *		Source for XcmsAddColorSpace
32 *
33 *
34 */
35/* $XFree86$ */
36
37#ifdef HAVE_CONFIG_H
38#include <config.h>
39#endif
40#include "Xlibint.h"
41#include "Xcmsint.h"
42#include "Cv.h"
43
44
45/*
46 *      DEFINES
47 */
48#define NextUnregDiCsID(lastid) \
49	    (XCMS_UNREG_ID(lastid) ? ++lastid : XCMS_FIRST_UNREG_DI_ID)
50#define MAX(x,y) ((x) < (y) ? (y) : (x))
51
52
53/*
54 *	NAME
55 *		XcmsAddColorSpace - Add a Device-Independent Color Space
56 *
57 *	SYNOPSIS
58 */
59Status
60XcmsAddColorSpace(XcmsColorSpace *pCS)
61/*
62 *	DESCRIPTION
63 *		DI Color Spaces are managed on a global basis.
64 *		This means that with exception of the provided DI color spaces:
65 *			CIEXYZ, CIExyY, CIELab, CIEuvY, CIELuv, and TekHVC
66 *		DI color spaces may have different XcmsColorFormat IDs between
67 *		clients.  So, you must be careful when using XcmsColor
68 *		structures between clients!  Use the routines XcmsFormatOfPrefix()
69 *		and XcmsPrefixOfFormat() appropriately.
70 *
71 *	RETURNS
72 *		XcmsSuccess if succeeded, otherwise XcmsFailure
73 */
74{
75    XcmsColorSpace **papColorSpaces;
76    XcmsColorSpace *ptmpCS;
77    XcmsColorFormat lastID = 0;
78
79    if ((pCS->id = _XcmsRegFormatOfPrefix(pCS->prefix)) != 0) {
80	if (XCMS_DD_ID(pCS->id)) {
81	    /* This is a Device-Dependent Color Space */
82	    return(XcmsFailure);
83	}
84	/*
85	 * REGISTERED DI Color Space
86	 *    then see if the color space has already been added to the
87	 *    system:
88	 *	    a. If the same ID/prefix and same XcmsColorSpec is found,
89	 *		then its a duplicate, so return success.
90	 *	    b. If same ID/prefix but different XcmsColorSpec is
91	 *		found, then add the color space to the front of the
92	 *		list using the same ID.  This allows one to override
93	 *		an existing DI Color Space.
94	 *	    c. Otherwise none found so just add the color space.
95	 */
96	if ((papColorSpaces = _XcmsDIColorSpaces) != NULL) {
97	    while ((ptmpCS = *papColorSpaces++) != NULL) {
98		if (pCS->id == ptmpCS->id) {
99		    if (pCS == ptmpCS) {
100			/* a. duplicate*/
101			return(XcmsSuccess);
102		    }
103		    /* b. same ID/prefix but different XcmsColorSpace */
104		    break;
105		}
106	    }
107	}
108	/* c. None found */
109    } else {
110	/*
111	 * UNREGISTERED DI Color Space
112	 *    then see if the color space has already been added to the
113	 *    system:
114	 *	    a. If same prefix and XcmsColorSpec, then
115	 *		its a duplicate ... return success.
116	 *	    b. If same prefix but different XcmsColorSpec, then
117	 *		add the color space to the front of the list using
118	 *		the same ID.  This allows one to override an existing
119	 *		DI Color Space.
120	 *	    c. Otherwise none found so, add the color space using the
121	 *		next unregistered ID for the connection.
122	 */
123	if ((papColorSpaces = _XcmsDIColorSpaces) != NULL) {
124	    while ((ptmpCS = *papColorSpaces++) != NULL) {
125		lastID = MAX(lastID, ptmpCS->id);
126		if (strcmp(pCS->prefix, ptmpCS->prefix) == 0) {
127		    if (pCS == ptmpCS) {
128			/* a. duplicate */
129			return(XcmsSuccess);
130		    }
131		    /* b. same prefix but different XcmsColorSpec */
132		    pCS->id = ptmpCS->id;
133		    goto AddColorSpace;
134		}
135	    }
136	}
137	/* c. None found */
138	pCS->id = NextUnregDiCsID(lastID);
139    }
140
141
142AddColorSpace:
143    if ((papColorSpaces = (XcmsColorSpace **)
144	    _XcmsPushPointerArray((XPointer *)_XcmsDIColorSpaces,
145	    (XPointer)pCS,
146	    (XPointer *)_XcmsDIColorSpacesInit)) == NULL) {
147	return(XcmsFailure);
148    }
149    _XcmsDIColorSpaces = papColorSpaces;
150    return(XcmsSuccess);
151}
152