/*
* Encog(tm) Core v3.0 - Java Version
* http://www.heatonresearch.com/encog/
* http://code.google.com/p/encog-java/
* Copyright 2008-2011 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.util;
import java.awt.Image;
import java.awt.image.ImageObserver;
import java.util.concurrent.Semaphore;
import org.encog.EncogError;
/**
* Simple class to determine the size of an image.
*
* @author jheaton
*/
public class ImageSize implements ImageObserver {
/**
* The width of the image.
*/
private int width;
/**
* The height of the image.
*/
private int height;
/**
* Wait for the values to be set.
*/
private final Semaphore wait;
/**
* Determine the size of an image.
*
* @param image
* The image to be sized.
*/
public ImageSize(final Image image) {
this.wait = new Semaphore(0);
this.width = image.getWidth(this);
this.height = image.getHeight(this);
if ((this.width == -1) || (this.height == -1)) {
try {
this.wait.acquire();
} catch (final InterruptedException e) {
throw new EncogError(e);
}
}
}
/**
* @return the height
*/
public int getHeight() {
return this.height;
}
/**
* @return the width
*/
public int getWidth() {
return this.width;
}
/**
* The image has been updated.
*
* @param img
* The image.
* @param infoflags
* Which data has been loaded.
* @param x
* Not used.
* @param y
* Not used.
* @param width
* The width of the image.
* @param height
* The height of the image.
* @return True if more data is still needed.
*/
public boolean imageUpdate(final Image img, final int infoflags,
final int x, final int y, final int width, final int height) {
final int c = ImageObserver.HEIGHT | ImageObserver.WIDTH;
if ((infoflags & c) != c) {
return true;
}
this.height = height;
this.width = width;
return false;
}
}