BmpPaletteSampleValue.h

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00001 /*
00002  * steghide 0.5.1 - a steganography program
00003  * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
00004  *
00005  * This program is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU General Public License
00007  * as published by the Free Software Foundation; either version 2
00008  * of the License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  * GNU General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU General Public License
00016  * along with this program; if not, write to the Free Software
00017  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00018  *
00019  */
00020 
00021 #ifndef SH_BMPPALETTESAMPLEVALUE_H
00022 #define SH_BMPPALETTESAMPLEVALUE_H
00023 
00024 #include "BmpSampleValue.h"
00025 #include "CvrStgFile.h"
00026 #include "ColorPalette.h"
00027 #include "common.h"
00028 
00033 class BmpPaletteSampleValue : public BmpSampleValue {
00034         public:
00035         BmpPaletteSampleValue (BYTE i) ;
00036 
00037         SampleValue* getNearestTargetSampleValue (EmbValue t) const ;
00038         std::string getName (void) const ;
00039 
00040         BYTE getIndex (void) const { return Index ; } ;
00041         BYTE getRed (void) const { return (*Palette)[Index].Red ; } ;
00042         BYTE getGreen (void) const { return (*Palette)[Index].Green ; } ;
00043         BYTE getBlue (void) const { return (*Palette)[Index].Blue ; } ;
00044 
00045         private:
00046         ColorPalette* Palette ;
00047         BYTE Index ;
00048 
00049         EmbValue calcEValue (BYTE idx) const
00050                 { return (idx % Globs.TheCvrStgFile->getEmbValueModulus()) ; } ;
00051 } ;
00052 
00053 #endif // ndef SH_BMPPALETTESAMPLEVALUE_H

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