0N/A/*
2362N/A * Copyright (c) 1995, 2000, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage java.awt.image;
0N/A
0N/A/**
0N/A * The interface for objects which can produce the image data for Images.
0N/A * Each image contains an ImageProducer which is used to reconstruct
0N/A * the image whenever it is needed, for example, when a new size of the
0N/A * Image is scaled, or when the width or height of the Image is being
0N/A * requested.
0N/A *
0N/A * @see ImageConsumer
0N/A *
0N/A * @author Jim Graham
0N/A */
0N/Apublic interface ImageProducer {
0N/A /**
0N/A * Registers an <code>ImageConsumer</code> with the
0N/A * <code>ImageProducer</code> for access to the image data
0N/A * during a later reconstruction of the <code>Image</code>.
0N/A * The <code>ImageProducer</code> may, at its discretion,
0N/A * start delivering the image data to the consumer
0N/A * using the <code>ImageConsumer</code> interface immediately,
0N/A * or when the next available image reconstruction is triggered
0N/A * by a call to the <code>startProduction</code> method.
0N/A * @param ic the specified <code>ImageConsumer</code>
0N/A * @see #startProduction
0N/A */
0N/A public void addConsumer(ImageConsumer ic);
0N/A
0N/A /**
0N/A * Determines if a specified <code>ImageConsumer</code>
0N/A * object is currently registered with this
0N/A * <code>ImageProducer</code> as one of its consumers.
0N/A * @param ic the specified <code>ImageConsumer</code>
0N/A * @return <code>true</code> if the specified
0N/A * <code>ImageConsumer</code> is registered with
0N/A * this <code>ImageProducer</code>;
0N/A * <code>false</code> otherwise.
0N/A */
0N/A public boolean isConsumer(ImageConsumer ic);
0N/A
0N/A /**
0N/A * Removes the specified <code>ImageConsumer</code> object
0N/A * from the list of consumers currently registered to
0N/A * receive image data. It is not considered an error
0N/A * to remove a consumer that is not currently registered.
0N/A * The <code>ImageProducer</code> should stop sending data
0N/A * to this consumer as soon as is feasible.
0N/A * @param ic the specified <code>ImageConsumer</code>
0N/A */
0N/A public void removeConsumer(ImageConsumer ic);
0N/A
0N/A /**
0N/A * Registers the specified <code>ImageConsumer</code> object
0N/A * as a consumer and starts an immediate reconstruction of
0N/A * the image data which will then be delivered to this
0N/A * consumer and any other consumer which might have already
0N/A * been registered with the producer. This method differs
0N/A * from the addConsumer method in that a reproduction of
0N/A * the image data should be triggered as soon as possible.
0N/A * @param ic the specified <code>ImageConsumer</code>
0N/A * @see #addConsumer
0N/A */
0N/A public void startProduction(ImageConsumer ic);
0N/A
0N/A /**
0N/A * Requests, on behalf of the <code>ImageConsumer</code>,
0N/A * that the <code>ImageProducer</code> attempt to resend
0N/A * the image data one more time in TOPDOWNLEFTRIGHT order
0N/A * so that higher quality conversion algorithms which
0N/A * depend on receiving pixels in order can be used to
0N/A * produce a better output version of the image. The
0N/A * <code>ImageProducer</code> is free to
0N/A * ignore this call if it cannot resend the data in that
0N/A * order. If the data can be resent, the
0N/A * <code>ImageProducer</code> should respond by executing
0N/A * the following minimum set of <code>ImageConsumer</code>
0N/A * method calls:
0N/A * <pre>
0N/A * ic.setHints(TOPDOWNLEFTRIGHT | < otherhints >);
0N/A * ic.setPixels(...); // As many times as needed
0N/A * ic.imageComplete();
0N/A * </pre>
0N/A * @param ic the specified <code>ImageConsumer</code>
0N/A * @see ImageConsumer#setHints
0N/A */
0N/A public void requestTopDownLeftRightResend(ImageConsumer ic);
0N/A}