Initial Contribution

1 files changed, 138 insertions, 0 deletions

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