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

 * 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);

    }

}