franta-hg@1: /* ================================================================
franta-hg@1:  * Cewolf : Chart enabling Web Objects Framework
franta-hg@1:  * ================================================================
franta-hg@1:  *
franta-hg@1:  * Project Info:  http://cewolf.sourceforge.net
franta-hg@1:  * Project Lead:  Guido Laures (guido@laures.de);
franta-hg@1:  *
franta-hg@1:  * (C) Copyright 2002, by Guido Laures
franta-hg@1:  *
franta-hg@1:  * This library is free software; you can redistribute it and/or modify it under the terms
franta-hg@1:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
franta-hg@1:  * either version 2.1 of the License, or (at your option) any later version.
franta-hg@1:  *
franta-hg@1:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
franta-hg@1:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
franta-hg@1:  * See the GNU Lesser General Public License for more details.
franta-hg@1:  *
franta-hg@1:  * You should have received a copy of the GNU Lesser General Public License along with this
franta-hg@1:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
franta-hg@1:  * Boston, MA 02111-1307, USA.
franta-hg@1:  */
franta-hg@1: 
franta-hg@1: package de.laures.cewolf.util;
franta-hg@1: 
franta-hg@1: import java.awt.Component;
franta-hg@1: import java.awt.Graphics;
franta-hg@1: import java.awt.Image;
franta-hg@1: import java.awt.MediaTracker;
franta-hg@1: import java.awt.image.BufferedImage;
franta-hg@1: import java.awt.image.ColorModel;
franta-hg@1: import java.awt.image.PixelGrabber;
franta-hg@1: 
franta-hg@1: import org.apache.commons.logging.Log;
franta-hg@1: import org.apache.commons.logging.LogFactory;
franta-hg@1: 
franta-hg@1: /** 
franta-hg@1:  * Some simple image rendering helper methods.
franta-hg@1:  * @author  Guido Laures 
franta-hg@1:  */
franta-hg@1: public class ImageHelper {
franta-hg@1: 
franta-hg@1:     private static final Component comp = new Component() { };
franta-hg@1:     private static final MediaTracker tracker = new MediaTracker(comp);
franta-hg@1:     private static final Log log = LogFactory.getLog(ImageHelper.class);
franta-hg@1: 
franta-hg@1:     /** Creates a new instance of ImageHelper */
franta-hg@1:     private ImageHelper() {
franta-hg@1:     }
franta-hg@1: 
franta-hg@1:     public static final Image loadImage(String fileName) {
franta-hg@1:         final Image image = java.awt.Toolkit.getDefaultToolkit().getImage(fileName);
franta-hg@1:         synchronized(tracker) {
franta-hg@1:             tracker.addImage(image, 0);
franta-hg@1:             try {
franta-hg@1:                 tracker.waitForID(0, 0);
franta-hg@1:             } catch (InterruptedException e) {
franta-hg@1:                 log.debug("INTERRUPTED while loading Image");
franta-hg@1:             }
franta-hg@1:             tracker.removeImage(image, 0);
franta-hg@1:         }
franta-hg@1:         return image;
franta-hg@1:     }
franta-hg@1: 
franta-hg@1:     public static BufferedImage loadBufferedImage(String fileName) {
franta-hg@1:         Image image = loadImage(fileName);
franta-hg@1:         if (image instanceof BufferedImage) {
franta-hg@1:             return (BufferedImage)image;
franta-hg@1:         }
franta-hg@1:         /*        final boolean hasAlpha = hasAlpha(image);
franta-hg@1:        int transparency = Transparency.OPAQUE;
franta-hg@1:         if (hasAlpha) {
franta-hg@1:             transparency = Transparency.BITMASK;
franta-hg@1:         }*/
franta-hg@1:         int width = (int)Math.max(1.0, image.getWidth(null));
franta-hg@1:         int height = (int)Math.max(1.0, image.getHeight(null));
franta-hg@1:         // BufferedImage bimage = GRAPHICS_CONV.createCompatibleImage(width, height, transparency);
franta-hg@1:         BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
franta-hg@1:         final Graphics g = bimage.createGraphics();
franta-hg@1:         g.drawImage(image, 0, 0, null);
franta-hg@1:         g.dispose();
franta-hg@1:         return bimage;
franta-hg@1:     }
franta-hg@1: 
franta-hg@1:     public static boolean hasAlpha(Image image) {
franta-hg@1:         if (image instanceof BufferedImage) {
franta-hg@1:             return ((BufferedImage)image).getColorModel().hasAlpha();
franta-hg@1:         }
franta-hg@1:         PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
franta-hg@1:         try {
franta-hg@1:             pg.grabPixels();
franta-hg@1:         } catch (InterruptedException e) {
franta-hg@1:             e.printStackTrace();
franta-hg@1:         }
franta-hg@1:         ColorModel cm = pg.getColorModel();
franta-hg@1:         if(cm == null){
franta-hg@1:         	return false;
franta-hg@1:         }
franta-hg@1:         return cm.hasAlpha();
franta-hg@1:     }
franta-hg@1: 
franta-hg@1:     public static BufferedImage createImage(int width, int height) {
franta-hg@1:         // return GRAPHICS_CONV.createCompatibleImage(width, height);
franta-hg@1:         return new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
franta-hg@1:     }
franta-hg@1: 
franta-hg@1: }