AddSF.c revision 61b2299d 
1/* $Xorg: AddSF.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 *		XcmsAddSF.c
29 *
30 *	DESCRIPTION
31 *		Source for XcmsAddFunctionSet
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 *      DEFINES
46 */
47#define NextUnregDdCsID(lastid) \
48	    (XCMS_UNREG_ID(lastid) ? ++lastid : XCMS_FIRST_UNREG_DD_ID)
49#define MIN(x,y) ((x) > (y) ? (y) : (x))
50
51
52/*
53 *	NAME
54 *		XcmsAddFunctionSet - Add an Screen Color Characterization
55 *					Function Set
56 *
57 *	SYNOPSIS
58 */
59Status
60XcmsAddFunctionSet(XcmsFunctionSet *pNewFS)
61/*
62 *	DESCRIPTION
63 *		Additional Screen Color Characterization Function Sets are
64 *		managed on a global basis.  This means that with exception
65 *		of the provided DD color spaces:
66 *			    RGB and RGBi
67 *		DD color spaces may have different XcmsColorFormat IDs between
68 *		clients.  So, you must be careful when using XcmsColorFormat
69 *		across clients!  Use the routines XcmsFormatOfPrefix()
70 *		and XcmsPrefixOfFormat() appropriately.
71 *
72 *	RETURNS
73 *		XcmsSuccess if succeeded, otherwise XcmsFailure
74 *
75 *	CAVEATS
76 *		Additional Screen Color Characterization Function Sets
77 *		should be added prior to any use of the routine
78 *		XcmsCreateCCC().  If not, XcmsCCC structures created
79 *		prior to the call of this routines will not have had
80 *		a chance to initialize using the added Screen Color
81 *		Characterization Function Set.
82 */
83{
84    XcmsFunctionSet **papSCCFuncSets = _XcmsSCCFuncSets;
85    XcmsColorSpace **papNewCSs;
86    XcmsColorSpace *pNewCS, **paptmpCS;
87    XcmsColorFormat lastID = 0;
88
89
90    if (papSCCFuncSets != NULL) {
91	if ((papNewCSs = pNewFS->DDColorSpaces) == NULL) {
92	    /*
93	     * Error, new Screen Color Characterization Function Set
94	     *	missing color spaces
95	     */
96	    return(XcmsFailure);
97	}
98	while ((pNewCS = *papNewCSs++) != NULL) {
99	    if ((pNewCS->id = _XcmsRegFormatOfPrefix(pNewCS->prefix)) != 0) {
100		if (XCMS_DI_ID(pNewCS->id)) {
101		    /* This is a Device-Independent Color Space */
102		    return(XcmsFailure);
103		}
104		/*
105		 * REGISTERED DD Color Space
106		 *    therefore use the registered ID.
107		 */
108	    } else {
109		/*
110		 * UNREGISTERED DD Color Space
111		 *    then see if the color space is already in
112		 *    _XcmsDDColorSpaces.
113		 *	    a. If same prefix, then use the same ID.
114		 *	    b. Otherwise, use a new ID.
115		 */
116		for (paptmpCS = _XcmsDDColorSpaces; *paptmpCS != NULL;
117			paptmpCS++){
118		    lastID = MIN(lastID, (*paptmpCS)->id);
119		    if (strcmp(pNewCS->prefix, (*paptmpCS)->prefix) == 0) {
120			pNewCS->id = (*paptmpCS)->id;
121			break;
122		    }
123		}
124		if (pNewCS->id == 0) {
125		    /* still haven't found one */
126		    pNewCS->id = NextUnregDdCsID(lastID);
127		    if ((paptmpCS = (XcmsColorSpace **)_XcmsPushPointerArray(
128		   	    (XPointer *) _XcmsDDColorSpaces,
129			    (XPointer) pNewCS,
130			    (XPointer *) _XcmsDDColorSpacesInit)) == NULL) {
131			return(XcmsFailure);
132		    }
133		    _XcmsDDColorSpaces = paptmpCS;
134		}
135	    }
136	}
137    }
138    if ((papSCCFuncSets = (XcmsFunctionSet **)
139	    _XcmsPushPointerArray((XPointer *) _XcmsSCCFuncSets,
140	    (XPointer) pNewFS,
141	    (XPointer *)_XcmsSCCFuncSetsInit)) == NULL) {
142	return(XcmsFailure);
143    }
144    _XcmsSCCFuncSets = papSCCFuncSets;
145
146    return(XcmsSuccess);
147}
148