1 /*

     2  *

     3  * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  *

     9  *   - Redistributions of source code must retain the above copyright

    10  *     notice, this list of conditions and the following disclaimer.

    11  *

    12  *   - Redistributions in binary form must reproduce the above copyright

    13  *     notice, this list of conditions and the following disclaimer in the

    14  *     documentation and/or other materials provided with the distribution.

    15  *

    16  *   - Neither the name of Oracle nor the names of its

    17  *     contributors may be used to endorse or promote products derived

    18  *     from this software without specific prior written permission.

    19  *

    20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

    21  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    31  */

    32 package java2d;

    33 

    34 

    35 import java.awt.Component;

    36 import java.awt.Image;

    37 import java.awt.MediaTracker;

    38 import java.net.URL;

    39 import java.util.Map;

    40 import java.util.concurrent.ConcurrentHashMap;

    41 import java.util.logging.Level;

    42 import java.util.logging.Logger;

    43 

    44 

    45 /**

    46  * A collection of all the demo images found in the images directory.

    47  * Certain classes are preloaded; the rest are loaded lazily.

    48  */

    49 @SuppressWarnings("serial")

    50 public class DemoImages extends Component {

    51 

    52     private static final String[] names = {

    53         "bld.jpg", "boat.png", "box.png",

    54         "boxwave.png", "clouds.jpg", "duke.gif", "duke.running.gif",

    55         "dukeplug.png", "fight.png", "globe.png",

    56         "jumptojavastrip.png", "magnify.png", "painting.png",

    57         "remove.gif", "snooze.png", "star7.gif", "surfing.png",

    58         "thumbsup.png", "tip.png", "duke.png", "print.gif",

    59         "loop.gif", "looping.gif", "start.gif", "start2.gif",

    60         "stop.gif", "stop2.gif", "clone.gif"

    61     };

    62     private static final Map<String, Image> cache =

    63             new ConcurrentHashMap<String, Image>(names.length);

    64 

    65     private DemoImages() {

    66     }

    67 

    68     public static void newDemoImages() {

    69         DemoImages demoImages = new DemoImages();

    70         for (String name : names) {

    71             cache.put(name, getImage(name, demoImages));

    72         }

    73     }

    74 

    75 

    76     /*

    77      * Gets the named image using the toolkit of the specified component.

    78      * Note that this has to work even before we have had a chance to

    79      * instantiate DemoImages and preload the cache.

    80      */

    81     public static Image getImage(String name, Component cmp) {

    82         Image img = null;

    83         if (cache != null) {

    84             if ((img = cache.get(name)) != null) {

    85                 return img;

    86             }

    87         }

    88 

    89         ClassLoader cl = cmp.getClass().getClassLoader();

    90         URL fileLoc = cl.getResource("images/" + name);

    91         img = cmp.getToolkit().getImage(fileLoc);

    92 

    93         MediaTracker tracker = new MediaTracker(cmp);

    94         tracker.addImage(img, 0);

    95         try {

    96             tracker.waitForID(0);

    97             if (tracker.isErrorAny()) {

    98                 System.out.println("Error loading image " + name);

    99             }

   100         } catch (Exception ex) {

   101             Logger.getLogger(DemoImages.class.getName()).log(Level.SEVERE, null, ex);

   102         }

   103         return img;

   104     }

   105 }