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. --- libjava/classpath/java/awt/Image.java | 242 ++++++++++++++++++++++++++++++++++ 1 file changed, 242 insertions(+) create mode 100644 libjava/classpath/java/awt/Image.java (limited to 'libjava/classpath/java/awt/Image.java') diff --git a/libjava/classpath/java/awt/Image.java b/libjava/classpath/java/awt/Image.java new file mode 100644 index 000000000..7b2cee7ae --- /dev/null +++ b/libjava/classpath/java/awt/Image.java @@ -0,0 +1,242 @@ +/* Image.java -- superclass for images + Copyright (C) 1999, 2002, 2004, 2005, 2006 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; + +import java.awt.image.AreaAveragingScaleFilter; +import java.awt.image.FilteredImageSource; +import java.awt.image.ImageFilter; +import java.awt.image.ImageObserver; +import java.awt.image.ImageProducer; +import java.awt.image.ReplicateScaleFilter; + +/** + * This is the abstract superclass of all image objects in Java. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @since 1.0 + * @status updated to 1.5 + */ +public abstract class Image +{ + /** + * This variable is returned whenever a property that is not defined + * is requested. + */ + // For debug purposes, this might as well be a unique string. + public static final Object UndefinedProperty + = new String("undefined property"); + + /** + * Constant indicating that the default scaling algorithm should be used. + * + * @since 1.1 + */ + public static final int SCALE_DEFAULT = 1; + + /** + * Constant indicating that a fast scaling algorithm should be used. + * + * @since 1.1 + */ + public static final int SCALE_FAST = 2; + + /** + * Constant indicating that a smooth scaling algorithm should be used. + * + * @since 1.1 + */ + public static final int SCALE_SMOOTH = 4; + + /** + * Constant indicating that the ReplicateScaleFilter class + * algorithm should be used for scaling. + * + * @see ReplicateScaleFilter + * @since 1.1 + */ + public static final int SCALE_REPLICATE = 8; + + /** + * Constant indicating that the area averaging scaling algorithm should be + * used. + * + * @see java.awt.image.AreaAveragingScaleFilter + * @since 1.1 + */ + public static final int SCALE_AREA_AVERAGING = 16; + + /** + * The acceleration priority of the image + * @since 1.5 + */ + protected float accelerationPriority; + + /** + * A default constructor for subclasses. + */ + public Image() + { + } + + /** + * Returns the width of the image, or -1 if it is unknown. If the + * image width is unknown, the observer object will be notified when + * the value is known. + * + * @param observer the image observer for this object + * @return the width in pixels + * @see #getHeight(ImageObserver) + */ + public abstract int getWidth(ImageObserver observer); + + /** + * Returns the height of the image, or -1 if it is unknown. If the + * image height is unknown, the observer object will be notified when + * the value is known. + * + * @param observer the image observer for this object + * @return the height in pixels + * @see #getWidth(ImageObserver) + */ + public abstract int getHeight(ImageObserver observer); + + /** + * Returns the image producer object for this object. The producer is the + * object which generates pixels for this image. + * + * @return the image producer for this object + */ + public abstract ImageProducer getSource(); + + /** + * Returns a graphics context object for drawing an off-screen object. + * This method is only valid for off-screen objects. + * + * @return a graphics context object for an off-screen object + */ + public abstract Graphics getGraphics(); + + /** + * This method requests a named property for an object. The value of the + * property is returned. The value UndefinedProperty is + * returned if there is no property with the specified name. The value + * null is returned if the properties for the object are + * not yet known. In this case, the specified image observer is notified + * when the properties are known. + * + * @param name the requested property name + * @param observer the image observer for this object + * @return the named property, if available + * @see #UndefinedProperty + */ + public abstract Object getProperty(String name, ImageObserver observer); + + /** + * Scales the image to the requested dimension. A new Image with asynchronous + * loading will be produced according to the hints of the algorithm + * requested. If either the width or height is non-positive, it is adjusted + * to preserve the original aspect ratio. + * If an illegal value of flags is passed, + * the default algorithm is used. + * + * @param width the width of the scaled image + * @param height the height of the scaled image + * @param flags a value indicating the algorithm to use + * @return the scaled Image object + * @see #SCALE_DEFAULT + * @see #SCALE_FAST + * @see #SCALE_SMOOTH + * @see #SCALE_REPLICATE + * @see #SCALE_AREA_AVERAGING + * @since 1.1 + */ + public Image getScaledInstance(int width, int height, int flags) + { + ImageFilter filter; + switch (flags) + { + case SCALE_AREA_AVERAGING: + case SCALE_SMOOTH: + filter = new AreaAveragingScaleFilter(width, height); + break; + case SCALE_DEFAULT: + case SCALE_FAST: + case SCALE_REPLICATE: + default: + filter = new ReplicateScaleFilter(width, height); + } + + ImageProducer producer = new FilteredImageSource(getSource(), filter); + return Toolkit.getDefaultToolkit().createImage(producer); + } + + /** + * Flushes (that is, destroys) any resources used for this image. This + * includes the actual image data. + */ + public abstract void flush(); + + /** + * Sets the acceleration priority of the image. + * This is a value from 0 (lowest) to 1 (highest), which may + * be used as a hint for image acceleration. + * E.g. higher priority images may be stored in video memory. + * @param priority - the priority + * @throws IllegalArgumentException if priority is not >= 0 and <= 1. + * + * @since 1.5 + */ + public void setAccelerationPriority(float priority) + { + if( priority < 0f || priority > 1f) + throw new IllegalArgumentException("Invalid priority value."); + accelerationPriority = priority; + } + + /** + * Returns the acceleration priority of the image. + * + * @see #setAccelerationPriority(float) + * @since 1.5 + */ + public float getAccelerationPriority() + { + return accelerationPriority; + } +} // class Image -- cgit v1.2.3