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 33 typedef 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 40 void zrlePaletteHelperInit (zrlePaletteHelper *helper); 41 void zrlePaletteHelperInsert(zrlePaletteHelper *helper, 42 zrle_U32 pix); 43 int zrlePaletteHelperLookup(zrlePaletteHelper *helper, 44 zrle_U32 pix); 45 46 #endif /* __ZRLE_PALETTE_HELPER_H__ */ 47