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Java example source code file (CropImageFilter.java)
The CropImageFilter.java Java example source code/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.awt.image;
import java.awt.image.ImageConsumer;
import java.awt.image.ColorModel;
import java.util.Hashtable;
import java.awt.Rectangle;
/**
* An ImageFilter class for cropping images.
* This class extends the basic ImageFilter Class to extract a given
* rectangular region of an existing Image and provide a source for a
* new image containing just the extracted region. It is meant to
* be used in conjunction with a FilteredImageSource object to produce
* cropped versions of existing images.
*
* @see FilteredImageSource
* @see ImageFilter
*
* @author Jim Graham
*/
public class CropImageFilter extends ImageFilter {
int cropX;
int cropY;
int cropW;
int cropH;
/**
* Constructs a CropImageFilter that extracts the absolute rectangular
* region of pixels from its source Image as specified by the x, y,
* w, and h parameters.
* @param x the x location of the top of the rectangle to be extracted
* @param y the y location of the top of the rectangle to be extracted
* @param w the width of the rectangle to be extracted
* @param h the height of the rectangle to be extracted
*/
public CropImageFilter(int x, int y, int w, int h) {
cropX = x;
cropY = y;
cropW = w;
cropH = h;
}
/**
* Passes along the properties from the source object after adding a
* property indicating the cropped region.
* This method invokes <code>super.setProperties,
* which might result in additional properties being added.
* <p>
* Note: This method is intended to be called by the
* <code>ImageProducer of the
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