unixcmap.c
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上传日期:2007-06-06
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文件大小:3k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 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
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (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.
- *
- * 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;
- XGetWindowAttributes(pDisplay, window, &attr);
- 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)
- {
- XQueryColors(pDisplay, cmap,
- gHXCurrentColors,
- MAX_COLORS);
- }
- }
- 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);
- }
- }