scalebit.h

/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * This file contains an example implementation of the Scale effect
 * applied to a generic bitmap.
 *
 * You can find a high-level description of the effect at:
 *
 * https://www.scale2x.it
 *
 * Alternatively at the previous license terms, you are allowed to use this
 * code in your program with these conditions:
 * - the program is not used in commercial activities.
 * - the whole source code of the program is released with the binary.
 * - derivative works of the program are allowed.
 */

#ifndef SCALER_SCALEBIT_H
#define SCALER_SCALEBIT_H

#include "graphics/scalerplugin.h"

int scale_precondition(unsigned scale, unsigned pixel, unsigned width, unsigned height);
void scale(unsigned scale, void* void_dst, unsigned dst_slice, const void* void_src, unsigned src_slice, unsigned pixel, unsigned width, unsigned height);

class AdvMameScaler : public Scaler {
public:
    AdvMameScaler(const Graphics::PixelFormat &format) : Scaler(format) { _factor = 2; }
    uint increaseFactor() override;
    uint decreaseFactor() override;
protected:
    virtual void scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
                            uint8 *dstPtr, uint32 dstPitch, int width, int height, int x, int y) override;
};

#endif