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+/* $Xorg: AddDIC.c,v 1.3 2000/08/17 19:44:29 cpqbld Exp $ */
+
+/*
+ * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
+ * All Rights Reserved
+ *
+ * This file is a component of an X Window System-specific implementation
+ * of Xcms based on the TekColor Color Management System. Permission is
+ * hereby granted to use, copy, modify, sell, and otherwise distribute this
+ * software and its documentation for any purpose and without fee, provided
+ * that this copyright, permission, and disclaimer notice is reproduced in
+ * all copies of this software and in supporting documentation. TekColor
+ * is a trademark of Tektronix, Inc.
+ *
+ * Tektronix makes no representation about the suitability of this software
+ * for any purpose. It is provided "as is" and with all faults.
+ *
+ * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
+ * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE. IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
+ *
+ *
+ * NAME
+ * XcmsAddDIC.c
+ *
+ * DESCRIPTION
+ * Source for XcmsAddColorSpace
+ *
+ *
+ */
+/* $XFree86$ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+
+/*
+ * DEFINES
+ */
+#define NextUnregDiCsID(lastid) \
+ (XCMS_UNREG_ID(lastid) ? ++lastid : XCMS_FIRST_UNREG_DI_ID)
+#define MAX(x,y) ((x) < (y) ? (y) : (x))
+
+
+/*
+ * NAME
+ * XcmsAddColorSpace - Add a Device-Independent Color Space
+ *
+ * SYNOPSIS
+ */
+Status
+XcmsAddColorSpace(XcmsColorSpace *pCS)
+/*
+ * DESCRIPTION
+ * DI Color Spaces are managed on a global basis.
+ * This means that with exception of the provided DI color spaces:
+ * CIEXYZ, CIExyY, CIELab, CIEuvY, CIELuv, and TekHVC
+ * DI color spaces may have different XcmsColorFormat IDs between
+ * clients. So, you must be careful when using XcmsColor
+ * structures between clients! Use the routines XcmsFormatOfPrefix()
+ * and XcmsPrefixOfFormat() appropriately.
+ *
+ * RETURNS
+ * XcmsSuccess if succeeded, otherwise XcmsFailure
+ */
+{
+ XcmsColorSpace **papColorSpaces;
+ XcmsColorSpace *ptmpCS;
+ XcmsColorFormat lastID = 0;
+
+ if ((pCS->id = _XcmsRegFormatOfPrefix(pCS->prefix)) != 0) {
+ if (XCMS_DD_ID(pCS->id)) {
+ /* This is a Device-Dependent Color Space */
+ return(XcmsFailure);
+ }
+ /*
+ * REGISTERED DI Color Space
+ * then see if the color space has already been added to the
+ * system:
+ * a. If the same ID/prefix and same XcmsColorSpec is found,
+ * then its a duplicate, so return success.
+ * b. If same ID/prefix but different XcmsColorSpec is
+ * found, then add the color space to the front of the
+ * list using the same ID. This allows one to override
+ * an existing DI Color Space.
+ * c. Otherwise none found so just add the color space.
+ */
+ if ((papColorSpaces = _XcmsDIColorSpaces) != NULL) {
+ while ((ptmpCS = *papColorSpaces++) != NULL) {
+ if (pCS->id == ptmpCS->id) {
+ if (pCS == ptmpCS) {
+ /* a. duplicate*/
+ return(XcmsSuccess);
+ }
+ /* b. same ID/prefix but different XcmsColorSpace */
+ break;
+ }
+ }
+ }
+ /* c. None found */
+ } else {
+ /*
+ * UNREGISTERED DI Color Space
+ * then see if the color space has already been added to the
+ * system:
+ * a. If same prefix and XcmsColorSpec, then
+ * its a duplicate ... return success.
+ * b. If same prefix but different XcmsColorSpec, then
+ * add the color space to the front of the list using
+ * the same ID. This allows one to override an existing
+ * DI Color Space.
+ * c. Otherwise none found so, add the color space using the
+ * next unregistered ID for the connection.
+ */
+ if ((papColorSpaces = _XcmsDIColorSpaces) != NULL) {
+ while ((ptmpCS = *papColorSpaces++) != NULL) {
+ lastID = MAX(lastID, ptmpCS->id);
+ if (strcmp(pCS->prefix, ptmpCS->prefix) == 0) {
+ if (pCS == ptmpCS) {
+ /* a. duplicate */
+ return(XcmsSuccess);
+ }
+ /* b. same prefix but different XcmsColorSpec */
+ pCS->id = ptmpCS->id;
+ goto AddColorSpace;
+ }
+ }
+ }
+ /* c. None found */
+ pCS->id = NextUnregDiCsID(lastID);
+ }
+
+
+AddColorSpace:
+ if ((papColorSpaces = (XcmsColorSpace **)
+ _XcmsPushPointerArray((XPointer *)_XcmsDIColorSpaces,
+ (XPointer)pCS,
+ (XPointer *)_XcmsDIColorSpacesInit)) == NULL) {
+ return(XcmsFailure);
+ }
+ _XcmsDIColorSpaces = papColorSpaces;
+ return(XcmsSuccess);
+}