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/* ImageProducer.java -- Java interface for image production
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
As a special exception, if you link this library with other files to
produce an executable, this library does not by itself cause the
resulting executable to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why the
executable file might be covered by the GNU General Public License. */
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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