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 3048 2007-07-28 18:02:42Z tmorgner $ 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 }