forked from kayahr/scilter
/
AbstractScaleFilter.java
63 lines (53 loc) · 1.93 KB
/
AbstractScaleFilter.java
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/*
* $Id$
* Copyright (C) 2006 Klaus Reimer <k@ailis.de>
*
* This program 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 2.1 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package de.ailis.scilter;
import java.awt.image.BufferedImage;
/**
* A base class for the scale filters implementing some common functionality.
*
* @author Klaus Reimer (k@ailis.de)
* @version $Revision$
*/
public abstract class AbstractScaleFilter implements ScaleFilter
{
/**
* @see ScaleFilter#scale(java.awt.image.BufferedImage)
*/
public BufferedImage scale(BufferedImage image)
{
int[] pixels;
int width, height;
int scaleFactor;
int newWidth, newHeight;
BufferedImage out;
// Get the original width
width = image.getWidth();
height = image.getHeight();
// Scale the pixels
pixels = scale(image.getRGB(0, 0, width, height, null, 0, width), width, height);
// Determine new picture size
scaleFactor = getScaleFactor();
newWidth = width * scaleFactor;
newHeight = height * scaleFactor;
// Create and return the new picture
out = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
out.setRGB(0, 0, newWidth, newHeight, pixels, 0, newWidth);
return out;
}
}