diff -r c943709738df -r 493cae4fd458 javaquery/canvas/src/main/java/net/java/html/canvas/ImageData.java
--- a/javaquery/canvas/src/main/java/net/java/html/canvas/ImageData.java	Tue Feb 11 13:35:35 2014 +0100
+++ b/javaquery/canvas/src/main/java/net/java/html/canvas/ImageData.java	Wed Feb 12 08:43:07 2014 +0100
@@ -1,19 +1,19 @@
 /**
- * Back 2 Browser Bytecode Translator
- * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ * Back 2 Browser Bytecode Translator Copyright (C) 2012 Jaroslav Tulach
+ * <jaroslav.tulach@apidesign.org>
  *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, version 2 of the License.
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 2 of the License.
  *
- * 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 General Public License for more details.
+ * 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 General Public License for more
+ * details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program. Look for COPYING file in the top folder.
- * If not, see http://opensource.org/licenses/GPL-2.0.
+ * You should have received a copy of the GNU General Public License along with
+ * this program. Look for COPYING file in the top folder. If not, see
+ * http://opensource.org/licenses/GPL-2.0.
  */
 package net.java.html.canvas;
 
@@ -26,23 +26,89 @@
  */
 public interface ImageData {
 
+    /**
+     * get the height.
+     *
+     * @return the height
+     */
     public double getHeight();
 
+    /**
+     * get the width
+     *
+     * @return the width
+     */
     public double getWidth();
 
+    /**
+     * get the red value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @return the red value as an int (0 -255)
+     */
     public int getR(int x, int y);
 
+    /**
+     * get the green value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @return the green value as an int (0 -255)
+     */
     public int getG(int x, int y);
 
+    /**
+     * get the blue value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @return the blue value as an int (0 -255)
+     */
     public int getB(int x, int y);
 
+    /**
+     * get the alpha (transparency) value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @return the alpha value as an int (0 - 255)
+     */
     public int getA(int x, int y);
 
+     /**
+     * set the red value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @param value the red value as an int (0 - 255)
+     */
     public void setR(int x, int y, int value);
 
+     /**
+     * set the green value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @param value the green value as an int (0 - 255)
+     */
     public void setG(int x, int y, int value);
 
+     /**
+     * set the blue value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @param value the blue value as an int (0 - 255)
+     */
     public void setB(int x, int y, int value);
 
+    /**
+     * set the alpha (transparency) value at a specified coordinate
+     *
+     * @param x
+     * @param y
+     * @param value the alpha value as an int (0 - 255)
+     */
     public void setA(int x, int y, int value);
 }