From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../java/awt/image/FilteredImageSource.java | 124 +++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 libjava/classpath/java/awt/image/FilteredImageSource.java (limited to 'libjava/classpath/java/awt/image/FilteredImageSource.java') diff --git a/libjava/classpath/java/awt/image/FilteredImageSource.java b/libjava/classpath/java/awt/image/FilteredImageSource.java new file mode 100644 index 000000000..f56a93ad1 --- /dev/null +++ b/libjava/classpath/java/awt/image/FilteredImageSource.java @@ -0,0 +1,124 @@ +/* FilteredImageSource.java -- Java class for providing image data + 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., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.awt.image; + +import java.util.Hashtable; + +/** + * + * @see ImageConsumer + * @author C. Brian Jones (cbj@gnu.org) + */ +public class FilteredImageSource implements ImageProducer +{ + ImageProducer ip; + ImageFilter filter; + Hashtable consumers = new Hashtable(); + + /** + * The given filter is applied to the given image producer + * to create a new image producer. + */ + public FilteredImageSource(ImageProducer ip, ImageFilter filter) { + this.ip = ip; + this.filter = filter; + } + + /** + * Used to register an ImageConsumer with this + * ImageProducer. + */ + public synchronized void addConsumer(ImageConsumer ic) { + if (consumers.containsKey(ic)) + return; + + ImageFilter f = filter.getFilterInstance(ic); + consumers.put(ic, f); + ip.addConsumer(f); + } + + /** + * Used to determine if the given ImageConsumer is + * already registered with this ImageProducer. + */ + public synchronized boolean isConsumer(ImageConsumer ic) { + ImageFilter f = (ImageFilter)consumers.get(ic); + if (f != null) + return ip.isConsumer(f); + return false; + } + + /** + * Used to remove an ImageConsumer from the list of + * registered consumers for this ImageProducer. + */ + public synchronized void removeConsumer(ImageConsumer ic) { + ImageFilter f = (ImageFilter)consumers.remove(ic); + if (f != null) + ip.removeConsumer(f); + } + + /** + * Used to register an ImageConsumer with this + * ImageProducer and then immediately start + * reconstruction of the image data to be delivered to all + * registered consumers. + */ + public void startProduction(ImageConsumer ic) { + ImageFilter f; + if (!(consumers.containsKey(ic))) { + f = filter.getFilterInstance(ic); + consumers.put(ic, f); + ip.addConsumer(f); + } else { + f = (ImageFilter)consumers.get( ic ); + } + ip.startProduction(f); + } + + /** + * Used to register an ImageConsumer with this + * ImageProducer and then request that this producer + * resend the image data in the order top-down, left-right. + */ + public void requestTopDownLeftRightResend(ImageConsumer ic) { + ImageFilter f = (ImageFilter)consumers.get(ic); + ip.requestTopDownLeftRightResend(f); + } +} -- cgit v1.2.3