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/**
* This file is part of VisiCut.
* Copyright (C) 2011 Thomas Oster <thomas.oster@rwth-aachen.de>
* RWTH Aachen University - 52062 Aachen, Germany
*
* VisiCut is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* VisiCut 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with VisiCut. If not, see <http://www.gnu.org/licenses/>.
**/
package com.t_oster.liblasercut.dithering;
/**
*
* @author Thomas Oster <thomas.oster@rwth-aachen.de>
*/
public class Ordered extends DitheringAlgorithm
{
protected void doDithering()
{
int width = src.getWidth();
int height = src.getHeight();
int nPatWid = 4;
int[][] filter =
{
{
16, 144, 48, 176
},
{
208, 80, 240, 112
},
{
64, 192, 32, 160
},
{
256, 128, 224, 96
},
};
int x = 0;
int y = 0;
int pixelcount = 0;
for (y = 0; y < (height - nPatWid); y = y + nPatWid)
{
for (x = 0; x < (width - nPatWid); x = x + nPatWid)
{
for (int xdelta = 0; xdelta < nPatWid; xdelta++)
{
for (int ydelta = 0; ydelta < nPatWid; ydelta++)
{
this.setBlack(x + xdelta, y + ydelta, src.getGreyScale(x + xdelta, y + ydelta) < filter[xdelta][ydelta]);
}
}
}
for (int xdelta = 0; xdelta < nPatWid; xdelta++)
{
for (int ydelta = 0; ydelta < nPatWid; ydelta++)
{
if (((x + xdelta) < width) && ((y + ydelta) < height))
{
this.setBlack(x + xdelta, y + ydelta, src.getGreyScale(x + xdelta, y + ydelta) < filter[xdelta][ydelta]);
}
}
}
setProgress((100 * pixelcount++) / (height));
}
// y is at max; loop through x
for (x = 0; x < (width); x = x + nPatWid)
{
for (int xdelta = 0; xdelta < nPatWid; xdelta++)
{
for (int ydelta = 0; ydelta < nPatWid; ydelta++)
{
if (((x + xdelta) < width) && ((y + ydelta) < height))
{
this.setBlack(x + xdelta, y + ydelta, src.getGreyScale(x + xdelta, y + ydelta) < filter[xdelta][ydelta]);
}
}
}
}
}
}