Initial Checkin

1 files changed, 175 insertions, 0 deletions

diff --git a/java/awt/Image.java b/java/awt/Image.java
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+/*************************************************************************
+/* Image.java -- Java class for images
+/*
+/* Copyright (c) 1999 Free Software Foundation, Inc.
+/* Written by Aaron M. Renn (arenn@urbanophile.com)
+/*
+/* This library is free software; you can redistribute it and/or modify
+/* it under the terms of the GNU Library General Public License as published 
+/* by the Free Software Foundation, either version 2 of the License, or
+/* (at your option) any later verion.
+/*
+/* This library 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 Library General Public License for more details.
+/*
+/* You should have received a copy of the GNU Library General Public License
+/* along with this library; if not, write to the Free Software Foundation
+/* Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
+/*************************************************************************/
+
+package java.awt;
+
+import java.awt.image.*;
+
+/**
+  * This is the abstract superclass of all image objects in Java.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public abstract class Image
+{
+
+/*
+ * Static Variables
+ */
+
+/**
+  * Constant indicating that the default scaling algorithm should be used.
+  */
+public static final int SCALE_DEFAULT = 1;
+
+/**
+  * Constant indicating that a fast scaling algorithm should be used.
+  */
+public static final int SCALE_FAST = 2;
+
+/**
+  * Constant indicating that a smooth scaling algorithm should be used.
+  */
+public static final int SCALE_SMOOTH = 4;
+
+/**
+  * Constant indicating that the <code>ReplicateScaleFilter</code> class
+  * algorithm should be used for scaling.
+  */
+public static final int SCALE_REPLICATE = 8; 
+
+/**
+  * Constant indicating that the area averaging scaling algorithm should be
+  * used.
+  */
+public static final int SCALE_AREA_AVERAGING = 16;
+
+/**
+  * This variable is returned whenever a property that is not defined
+  * is requested.
+  */
+public static final Object UndefinedProperty = Image.class;
+
+/*************************************************************************/
+
+/*
+ * Constructors
+ */
+
+/**
+  * A default constructor for subclasses.
+  */
+public 
+Image()
+{
+}
+
+/*************************************************************************/
+
+/*
+ * Instance Methods
+ */
+
+/**
+  * 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.
+  */
+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.
+  */
+public abstract int
+getHeight(ImageObserver observer);
+
+/*************************************************************************/
+
+/**
+  * Returns the image producer object for this object.
+  *
+  * @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 <code>UndefinedProperty</code> is
+  * returned if there is no property with the specified name.  The value
+  * <code>null</code> 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.
+  */
+public abstract Object
+getProperty(String name, ImageObserver observer);
+
+/*************************************************************************/
+
+/**
+  * Scales the image to the requested dimension.
+  * 
+  * @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, which will be
+  * set from contants defined in this class.
+  *
+  * @return The scaled <code>Image</code> object.
+  */
+public abstract Image
+getScaledInstance(int width, int height, int flags);
+
+/*************************************************************************/
+
+/**
+  * Flushes (that is, destroys) any resources used for this image.  This
+  * includes the actual image data.
+  */
+public abstract void
+flush();
+
+} // class Image
+