unixcmap.c
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: unixcmap.c,v 1.1.1.1.42.2 2004/07/09 12:48:45 pankajgupta Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h"
- #include "hxcom.h"
- #include <X11/Xlib.h>
- #include <X11/Intrinsic.h>
- #include <X11/StringDefs.h>
- #include "unixcmap.h"
- #define MAX_COLORS 256
- XColor gHXCurrentColors[MAX_COLORS];
- Colormap gHXColormap = 0;
- Colormap HXGetXColormap(Display* pDisplay, Window window)
- {
- XWindowAttributes attr;
- XLockDisplay(pDisplay);
- XGetWindowAttributes(pDisplay, window, &attr);
- XUnlockDisplay(pDisplay);
- return attr.colormap;
- }
- static void HXInitXColormap(Display* pDisplay, Colormap cmap)
- {
- int i;
- for (i=0; i<MAX_COLORS; i++)
- {
- gHXCurrentColors[i].pixel = i;
- }
- gHXColormap = cmap;
- if (pDisplay && cmap)
- {
- XLockDisplay(pDisplay);
- XQueryColors(pDisplay, cmap,
- gHXCurrentColors,
- MAX_COLORS);
- XUnlockDisplay(pDisplay);
- }
- }
- static int Distance(XColor c1, XColor c2)
- {
- return abs(c1.red - c2.red) +
- abs(c1.green - c2.green) +
- abs(c1.blue - c2.blue);
- }
- void HXFindBestXColor(Display* pDisplay, Colormap cmap, XColor* desired)
- {
- BOOL foundMatch = FALSE;
- XColor bestMatch = gHXCurrentColors[0];
- unsigned int i, distance = ~0;
- if (desired)
- {
- if (XAllocColor(pDisplay, cmap, desired))
- {
- return;
- } else if (cmap == gHXColormap) {
- for (i=0; i<MAX_COLORS; i++)
- {
- if (Distance(*desired, gHXCurrentColors[i]) < distance)
- {
- bestMatch = gHXCurrentColors[i];
- distance = Distance(*desired, gHXCurrentColors[i]);
- foundMatch = TRUE;
- }
- }
- }
- }
- if (foundMatch)
- {
- *desired = bestMatch;
- } else {
- HXInitXColormap(pDisplay, cmap);
- HXFindBestXColor(pDisplay, cmap, desired);
- }
- }