154 lines
3.9 KiB
Java
154 lines
3.9 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Oleg V. Khaschansky
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* @version $Revision$
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*
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* @date: Sep 28, 2005
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*/
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package java.awt.image;
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import org.apache.harmony.awt.internal.nls.Messages;
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/**
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* The Kernel class provides a matrix. This matrix is stored as a float array
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* which describes how a specified pixel affects the value calculated for the
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* pixel's position in the output image of a filtering operation. The X, Y
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* origins indicate the kernel matrix element which corresponds to the pixel
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* position for which an output value is being calculated.
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*
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* @since Android 1.0
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*/
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public class Kernel implements Cloneable {
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/**
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* The x origin.
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*/
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private final int xOrigin;
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/**
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* The y origin.
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*/
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private final int yOrigin;
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/**
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* The width.
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*/
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private int width;
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/**
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* The height.
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*/
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private int height;
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/**
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* The data.
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*/
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float data[];
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/**
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* Instantiates a new Kernel with the specified float array. The
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* width*height elements of the data array are copied.
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*
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* @param width
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* the width of the Kernel.
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* @param height
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* the height of the Kernel.
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* @param data
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* the data of Kernel.
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*/
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public Kernel(int width, int height, float[] data) {
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int dataLength = width * height;
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if (data.length < dataLength) {
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// awt.22B=Length of data should not be less than width*height
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throw new IllegalArgumentException(Messages.getString("awt.22B")); //$NON-NLS-1$
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}
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this.width = width;
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this.height = height;
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this.data = new float[dataLength];
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System.arraycopy(data, 0, this.data, 0, dataLength);
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xOrigin = (width - 1) / 2;
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yOrigin = (height - 1) / 2;
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}
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/**
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* Gets the width of this Kernel.
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*
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* @return the width of this Kernel.
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*/
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public final int getWidth() {
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return width;
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}
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/**
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* Gets the height of this Kernel.
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*
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* @return the height of this Kernel.
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*/
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public final int getHeight() {
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return height;
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}
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/**
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* Gets the float data array of this Kernel.
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*
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* @param data
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* the float array where the resulted data will be stored.
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* @return the float data array of this Kernel.
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*/
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public final float[] getKernelData(float[] data) {
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if (data == null) {
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data = new float[this.data.length];
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}
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System.arraycopy(this.data, 0, data, 0, this.data.length);
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return data;
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}
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/**
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* Gets the X origin of this Kernel.
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*
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* @return the X origin of this Kernel.
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*/
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public final int getXOrigin() {
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return xOrigin;
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}
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/**
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* Gets the Y origin of this Kernel.
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*
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* @return the Y origin of this Kernel.
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*/
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public final int getYOrigin() {
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return yOrigin;
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}
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/**
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* Returns a copy of this Kernel object.
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*
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* @return the copy of this Kernel object.
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*/
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@Override
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public Object clone() {
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return new Kernel(width, height, data);
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}
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}
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