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/* ImageProducer.java -- Java interface for image production
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the non-peer AWT libraries of GNU Classpath.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation, either version 2 of the License, or
(at your option) any later verion.
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 Library General Public License for more details.
You should have received a copy of the GNU Library 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 java.awt.image;
/**
* An object implementing the <code>ImageProducer</code> interface can
* produce data for images. Each image has a corresponding
* <code>ImageProducer</code> which is needed for things such as
* resizing the image.
*
* @see ImageConsumer
* @author C. Brian Jones (cbj@gnu.org)
*/
public interface ImageProducer
{
/**
* Used to register an <code>ImageConsumer</code> with this
* <code>ImageProducer</code>.
*/
public abstract void addConsumer(ImageConsumer ic);
/**
* Used to determine if the given <code>ImageConsumer</code> is
* already registered with this <code>ImageProducer</code>.
*/
public abstract boolean isConsumer(ImageConsumer ic);
/**
* Used to remove an <code>ImageConsumer</code> from the list of
* registered consumers for this <code>ImageProducer</code>.
*/
public abstract void removeConsumer(ImageConsumer ic);
/**
* Used to register an <code>ImageConsumer</code> with this
* <code>ImageProducer</code> and then immediately start
* reconstruction of the image data to be delivered to all
* registered consumers.
*/
public abstract void startProduction(ImageConsumer ic);
/**
* Used to register an <code>ImageConsumer</code> with this
* <code>ImageProducer</code> and then request that this producer
* resend the image data in the order top-down, left-right.
*/
public abstract void requestTopDownLeftRightResend(ImageConsumer ic);
}
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