mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-23 10:19:27 +00:00
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
/* 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) {
|
|
assert(start + num <= 256);
|
|
memcpy(colors, _palette + 3 * start, 3 * num);
|
|
}
|
|
};
|
|
|
|
#endif
|