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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 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/>.
*
*/
#ifndef GRAPHICS_LARRYSCALE_H
#define GRAPHICS_LARRYSCALE_H
#include "common/scummsys.h"
namespace Graphics {
/*
LarryScale is a bitmap scaler for cartoon images.
Features:
* Supports arbitrary scaling factors along both axes (but looks best between 50% and 200%).
* When downscaling: preserves fine details.
* When upscaling: keeps lines smooth, introducing very few block artifacts.
* Does not introduce additional colors.
Limitations:
* Lines must not be anti-aliased and should be only one pixel wide.
* Fills should be flat without gradients.
*/
typedef byte LarryScaleColor;
class RowReader {
public:
virtual const LarryScaleColor *readRow(int y) = 0;
virtual ~RowReader() {}
};
class RowWriter {
public:
virtual void writeRow(int y, const LarryScaleColor *row) = 0;
virtual ~RowWriter() {}
};
/**
* @param srcWidth The width, in pixels, of the original image
* @param srcHeight The height, in pixels, of the original image
* @param transparentColor The transparent color. Used for outline detection.
* @param rowReader An object with a callback method for reading the lines of the original
* image
* @param dstWidth The width, in pixels, of the scaled target image
* @param dstHeight The height, in pixels, of the scaled target image
* @param rowWriter An object with a callback method accepting the lines of the target image
*/
void larryScale(
int srcWidth, int srcHeight,
LarryScaleColor transparentColor,
RowReader &rowReader,
int dstWidth, int dstHeight,
RowWriter &rowWriter
);
}
#endif
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