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Java example source code file (ImageProducer.java)
The ImageProducer.java Java example source code/* * Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.awt.image; /** * The interface for objects which can produce the image data for Images. * Each image contains an ImageProducer which is used to reconstruct * the image whenever it is needed, for example, when a new size of the * Image is scaled, or when the width or height of the Image is being * requested. * * @see ImageConsumer * * @author Jim Graham */ public interface ImageProducer { /** * Registers an <code>ImageConsumer with the * <code>ImageProducer for access to the image data * during a later reconstruction of the <code>Image. * The <code>ImageProducer may, at its discretion, * start delivering the image data to the consumer * using the <code>ImageConsumer interface immediately, * or when the next available image reconstruction is triggered * by a call to the <code>startProduction method. * @param ic the specified <code>ImageConsumer * @see #startProduction */ public void addConsumer(ImageConsumer ic); /** * Determines if a specified <code>ImageConsumer * object is currently registered with this * <code>ImageProducer as one of its consumers. * @param ic the specified <code>ImageConsumer * @return <code>true if the specified * <code>ImageConsumer is registered with * this <code>ImageProducer; * <code>false otherwise. */ public boolean isConsumer(ImageConsumer ic); /** * Removes the specified <code>ImageConsumer object * from the list of consumers currently registered to * receive image data. It is not considered an error * to remove a consumer that is not currently registered. * The <code>ImageProducer should stop sending data * to this consumer as soon as is feasible. * @param ic the specified <code>ImageConsumer */ public void removeConsumer(ImageConsumer ic); /** * Registers the specified <code>ImageConsumer object * as a consumer and starts an immediate reconstruction of * the image data which will then be delivered to this * consumer and any other consumer which might have already * been registered with the producer. This method differs * from the addConsumer method in that a reproduction of * the image data should be triggered as soon as possible. * @param ic the specified <code>ImageConsumer * @see #addConsumer */ public void startProduction(ImageConsumer ic); /** * Requests, on behalf of the <code>ImageConsumer, * that the <code>ImageProducer attempt to resend * the image data one more time in TOPDOWNLEFTRIGHT order * so that higher quality conversion algorithms which * depend on receiving pixels in order can be used to * produce a better output version of the image. The * <code>ImageProducer is free to * ignore this call if it cannot resend the data in that * order. If the data can be resent, the * <code>ImageProducer should respond by executing * the following minimum set of <code>ImageConsumer * method calls: * <pre>{@code * ic.setHints(TOPDOWNLEFTRIGHT | < otherhints >); * ic.setPixels(...); // As many times as needed * ic.imageComplete(); * }</pre> * @param ic the specified <code>ImageConsumer * @see ImageConsumer#setHints */ public void requestTopDownLeftRightResend(ImageConsumer ic); } Other Java examples (source code examples)Here is a short list of links related to this Java ImageProducer.java source code file: |
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