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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef BACKENDS_GRAPHICS_DEFAULT_PALETTE_H
#define BACKENDS_GRAPHICS_DEFAULT_PALETTE_H
#include "graphics/palette.h"
/**
* This is a default implementation of the PaletteManager interface
* which ensures that grabPalette works as specified. Of course
* it is still necessary to provide code that actually updates
* the (possibly emulated) "hardware" palette of the backend.
* For this purpose, implement the abstract setPaletteIntern
* method.
*/
class DefaultPaletteManager : public PaletteManager {
protected:
byte _palette[3 * 256];
/**
* Subclasses should only implement this method and none of the others.
* Its semantics are like that of setPalette, only that it does not need
* to worry about making it possible to query the palette values once they
* have been set.
*/
virtual void setPaletteIntern(const byte *colors, uint start, uint num) = 0;
public:
void setPalette(const byte *colors, uint start, uint num) {
assert(start + num <= 256);
memcpy(_palette + 3 * start, colors, 3 * num);
setPaletteIntern(colors, start, num);
}
void grabPalette(byte *colors, uint start, uint num) const {
assert(start + num <= 256);
memcpy(colors, _palette + 3 * start, 3 * num);
}
};
#endif
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