/apps/desktop/libvncserver/zrlepalettehelper.h

 1/*
 2 * Copyright (C) 2002 RealVNC Ltd.  All Rights Reserved.
 3 * Copyright (C) 2003 Sun Microsystems, Inc.
 4 *
 5 * This is free software; you can redistribute it and/or modify
 6 * it under the terms of the GNU General Public License as published by
 7 * the Free Software Foundation; either version 2 of the License, or
 8 * (at your option) any later version.
 9 *
10 * This software is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this software; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
18 * USA.
19 */
20
21/*
22 * The PaletteHelper class helps us build up the palette from pixel data by
23 * storing a reverse index using a simple hash-table
24 */
25
26#ifndef __ZRLE_PALETTE_HELPER_H__
27#define __ZRLE_PALETTE_HELPER_H__
28
29#include "zrletypes.h"
30
31#define ZRLE_PALETTE_MAX_SIZE 127
32
33typedef struct {
34  zrle_U32  palette[ZRLE_PALETTE_MAX_SIZE];
35  zrle_U8   index[ZRLE_PALETTE_MAX_SIZE + 4096];
36  zrle_U32  key[ZRLE_PALETTE_MAX_SIZE + 4096];
37  int       size;
38} zrlePaletteHelper;
39
40void zrlePaletteHelperInit  (zrlePaletteHelper *helper);
41void zrlePaletteHelperInsert(zrlePaletteHelper *helper,
42			     zrle_U32           pix);
43int  zrlePaletteHelperLookup(zrlePaletteHelper *helper,
44			     zrle_U32           pix);
45
46#endif /* __ZRLE_PALETTE_HELPER_H__ */