/* ================================================================

  * Cewolf : Chart enabling Web Objects Framework

  * ================================================================

  *

  * Project Info:  http://cewolf.sourceforge.net

  * Project Lead:  Guido Laures (guido@laures.de);

  *

  * (C) Copyright 2002, by Guido Laures

  *

  * This library is free software; you can redistribute it and/or modify it under the terms

  * of the GNU Lesser General Public License as published by the Free Software Foundation;

  * either version 2.1 of the License, or (at your option) any later version.

  *

  * This library 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 Lesser General Public License for more details.

  *

  * You should have received a copy of the GNU Lesser General Public License along with this

  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

  * Boston, MA 02111-1307, USA.

  */

 package de.laures.cewolf.util;

 import java.awt.Component;

 import java.awt.Graphics;

 import java.awt.Image;

 import java.awt.MediaTracker;

 import java.awt.image.BufferedImage;

 import java.awt.image.ColorModel;

 import java.awt.image.PixelGrabber;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 /** 

  * Some simple image rendering helper methods.

  * @author  Guido Laures 

  */

 public class ImageHelper {

     private static final Component comp = new Component() { };

     private static final MediaTracker tracker = new MediaTracker(comp);

     private static final Log log = LogFactory.getLog(ImageHelper.class);

     /** Creates a new instance of ImageHelper */

     private ImageHelper() {

     }

     public static final Image loadImage(String fileName) {

         final Image image = java.awt.Toolkit.getDefaultToolkit().getImage(fileName);

         synchronized(tracker) {

             tracker.addImage(image, 0);

             try {

                 tracker.waitForID(0, 0);

             } catch (InterruptedException e) {

                 log.debug("INTERRUPTED while loading Image");

             }

             tracker.removeImage(image, 0);

         }

         return image;

     }

     public static BufferedImage loadBufferedImage(String fileName) {

         Image image = loadImage(fileName);

         if (image instanceof BufferedImage) {

             return (BufferedImage)image;

         }

         /*        final boolean hasAlpha = hasAlpha(image);

        int transparency = Transparency.OPAQUE;

         if (hasAlpha) {

             transparency = Transparency.BITMASK;

         }*/

         int width = (int)Math.max(1.0, image.getWidth(null));

         int height = (int)Math.max(1.0, image.getHeight(null));

         // BufferedImage bimage = GRAPHICS_CONV.createCompatibleImage(width, height, transparency);

         BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

         final Graphics g = bimage.createGraphics();

         g.drawImage(image, 0, 0, null);

         g.dispose();

         return bimage;

     }

     public static boolean hasAlpha(Image image) {

         if (image instanceof BufferedImage) {

             return ((BufferedImage)image).getColorModel().hasAlpha();

         }

         PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);

         try {

             pg.grabPixels();

         } catch (InterruptedException e) {

             e.printStackTrace();

         }

         ColorModel cm = pg.getColorModel();

         if(cm == null){

         	return false;

         }

         return cm.hasAlpha();

     }

     public static BufferedImage createImage(int width, int height) {

         // return GRAPHICS_CONV.createCompatibleImage(width, height);

         return new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

     }

 }