001    /**
002     * ========================================
003     * JFreeReport : a free Java report library
004     * ========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/
007     *
008     * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: ImageUtils.java 2725 2007-04-01 18:49:29Z taqua $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    
032    package org.jfree.report.util;
033    
034    import java.awt.image.BufferedImage;
035    import java.util.Arrays;
036    import javax.swing.Icon;
037    import javax.swing.ImageIcon;
038    
039    /**
040     * Provides utility methods for image creation and manipluation.
041     *
042     * @author Thomas Morgner
043     */
044    public final class ImageUtils
045    {
046      /**
047       * DefaultConstructor.
048       */
049      private ImageUtils ()
050      {
051      }
052    
053      /**
054       * Creates a transparent image.  These can be used for aligning menu items.
055       *
056       * @param width  the width.
057       * @param height the height.
058       * @return the created transparent image.
059       */
060      public static BufferedImage createTransparentImage (final int width, final int height)
061      {
062        final BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
063        final int[] data = img.getRGB(0, 0, width, height, null, 0, width);
064        Arrays.fill(data, 0x00000000);
065        img.setRGB(0, 0, width, height, data, 0, width);
066        return img;
067      }
068    
069      /**
070       * Creates a transparent icon. The Icon can be used for aligning menu items.
071       *
072       * @param width  the width of the new icon
073       * @param height the height of the new icon
074       * @return the created transparent icon.
075       */
076      public static Icon createTransparentIcon (final int width, final int height)
077      {
078        return new ImageIcon(createTransparentImage(width, height));
079      }
080    }