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Java Source | 1996-05-03 | 3.5 KB | 98 lines |
- /*
- * @(#)Image.java 1.16 95/12/14 Sami Shaio
- *
- * Copyright (c) 1995 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
- package java.awt;
-
- import java.awt.image.ImageProducer;
- import java.awt.image.ImageObserver;
-
- /**
- * The image class is an abstract class. The image must be obtained in a
- * platform specific way.
- *
- * @version 1.16, 14 Dec 1995
- * @author Sami Shaio
- * @author Arthur van Hoff
- */
- public abstract class Image {
- /**
- * Gets the actual width of the image. If the width is not known
- * yet then the ImageObserver will be notified later and -1 will
- * be returned.
- * @see #getHeight
- * @see ImageObserver
- */
- public abstract int getWidth(ImageObserver observer);
-
- /**
- * Gets the actual height of the image. If the height is not known
- * yet then the ImageObserver will be notified later and -1 will
- * be returned.
- * @see #getWidth
- * @see ImageObserver
- */
- public abstract int getHeight(ImageObserver observer);
-
- /**
- * Gets the object that produces the pixels for the image.
- * This is used by the Image filtering classes and by the
- * image conversion and scaling code.
- * @see ImageProducer
- */
- public abstract ImageProducer getSource();
-
- /**
- * Gets a graphics object to draw into this image.
- * This will only work for off-screen images.
- * @see Graphics
- */
- public abstract Graphics getGraphics();
-
- /**
- * Gets a property of the image by name. Individual property names
- * are defined by the various image formats. If a property is not
- * defined for a particular image, this method will return the
- * UndefinedProperty object. If the properties for this image are
- * not yet known, then this method will return null and the ImageObserver
- * object will be notified later. The property name "comment" should
- * be used to store an optional comment which can be presented to
- * the user as a description of the image, its source, or its author.
- * @see ImageObserver
- * @see #UndefinedProperty
- */
- public abstract Object getProperty(String name, ImageObserver observer);
-
- /**
- * The UndefinedProperty object should be returned whenever a
- * property which was not defined for a particular image is
- * fetched.
- */
- public static final Object UndefinedProperty = new Object();
-
- /**
- * Flushes all resources being used by this Image object. This
- * includes any pixel data that is being cached for rendering to
- * the screen as well as any system resources that are being used
- * to store data or pixels for the image. The image is reset to
- * a state similar to when it was first created so that if it is
- * again rendered, the image data will have to be recreated or
- * fetched again from its source.
- */
- public abstract void flush();
- }
-