/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* @author Igor V. Stolyarov
* @version $Revision$
*/
package java.awt;
import java.awt.image.AreaAveragingScaleFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageObserver;
import java.awt.image.ImageProducer;
import java.awt.image.ReplicateScaleFilter;
import org.apache.harmony.awt.internal.nls.Messages;
public abstract class Image {
public static final Object UndefinedProperty = new Object(); //$NON-LOCK-1$
public static final int SCALE_DEFAULT = 1;
public static final int SCALE_FAST = 2;
public static final int SCALE_SMOOTH = 4;
public static final int SCALE_REPLICATE = 8;
public static final int SCALE_AREA_AVERAGING = 16;
protected float accelerationPriority = 0.5f;
private static final ImageCapabilities capabilities = new ImageCapabilities(false);
public abstract Object getProperty(String name, ImageObserver observer);
public abstract ImageProducer getSource();
public abstract int getWidth(ImageObserver observer);
public abstract int getHeight(ImageObserver observer);
public Image getScaledInstance(int width, int height, int hints) {
ImageFilter filter;
if ((hints & (SCALE_SMOOTH | SCALE_AREA_AVERAGING)) != 0) {
filter = new AreaAveragingScaleFilter(width, height);
} else {
filter = new ReplicateScaleFilter(width, height);
}
ImageProducer producer = new FilteredImageSource(getSource(), filter);
return Toolkit.getDefaultToolkit().createImage(producer);
}
public abstract Graphics getGraphics();
public abstract void flush();
public float getAccelerationPriority() {
return accelerationPriority;
}
public void setAccelerationPriority(float priority) {
if (priority < 0 || priority > 1) {
// awt.10A=Priority must be a value between 0 and 1, inclusive
throw new IllegalArgumentException(Messages.getString("awt.10A")); //$NON-NLS-1$
}
accelerationPriority = priority;
}
public ImageCapabilities getCapabilities(GraphicsConfiguration gc) {
// Note: common image is not accelerated.
return capabilities;
}
}