287 lines
6.8 KiB
Java
287 lines
6.8 KiB
Java
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/* GtkImage.java
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Copyright (C) 1999, 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.peer.gtk;
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import java.awt.*;
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import java.util.*;
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import java.awt.image.*;
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public class GtkImage extends Image implements ImageConsumer
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{
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int width = -1, height = -1;
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Hashtable props = null;
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boolean isLoaded = false;
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boolean isCacheable = true;
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boolean loading = false;
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Vector widthObservers = new Vector ();
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Vector heightObservers = new Vector ();
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Vector propertyObservers = new Vector ();
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ImageProducer source;
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Graphics g;
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/* Variables in which we stored cached data, if possible.
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An image is cached if the following properties are true:
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1. The ColorModel passed into setColorModel is the same ColorModel
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passed to all invocations of setPixels.
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2. The image contains a single frame.
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*/
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int[] pixelCache;
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ColorModel model;
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public
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GtkImage (ImageProducer producer, Graphics g)
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{
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source = producer;
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this.g = g;
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source.addConsumer (this);
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}
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public synchronized int
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getWidth (ImageObserver observer)
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{
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if (width == -1)
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widthObservers.addElement (observer);
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return width;
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}
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public synchronized int
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getHeight (ImageObserver observer)
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{
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if (height == -1)
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heightObservers.addElement (observer);
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return height;
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}
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public ImageProducer
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getSource ()
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{
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return source;
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}
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public Graphics
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getGraphics ()
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{
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return g;
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}
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public synchronized Object
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getProperty (String name, ImageObserver observer)
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{
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if (props == null)
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{
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propertyObservers.addElement (observer);
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return null;
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}
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Object value = props.get (name);
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return (value == null) ? UndefinedProperty : value;
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}
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public synchronized void
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flush ()
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{
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isLoaded = false;
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isCacheable = true;
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width = height = -1;
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props = null;
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pixelCache = null;
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model = null;
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source.removeConsumer (this);
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source.addConsumer (this);
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}
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public boolean
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isLoaded ()
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{
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return isLoaded;
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}
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/* ImageConsumer methods */
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public synchronized void
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setDimensions (int width, int height)
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{
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pixelCache = new int[width*height];
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this.width = width;
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this.height = height;
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for (int i = 0; i < widthObservers.size (); i++)
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{
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ImageObserver io = (ImageObserver) widthObservers.elementAt (i);
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io.imageUpdate (this, ImageObserver.WIDTH, -1, -1, width, height);
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}
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for (int i = 0; i < heightObservers.size (); i++)
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{
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ImageObserver io = (ImageObserver) heightObservers.elementAt (i);
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io.imageUpdate (this, ImageObserver.HEIGHT, -1, -1, width, height);
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}
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}
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public synchronized void
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setProperties (Hashtable props)
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{
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this.props = props;
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for (int i = 0; i < propertyObservers.size (); i++)
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{
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ImageObserver io = (ImageObserver) propertyObservers.elementAt (i);
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io.imageUpdate (this, ImageObserver.PROPERTIES, -1, -1, width, height);
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}
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}
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public synchronized void
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setColorModel (ColorModel model)
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{
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if (this.model == null || this.model == model)
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this.model = model;
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else
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isCacheable = false;
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}
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public synchronized void
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setHints (int flags)
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{
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}
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public synchronized void
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setPixels (int x, int y, int width, int height, ColorModel cm, byte[] pixels,
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int offset, int scansize)
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{
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setPixels (x, y, width, height, cm, convertPixels (pixels), offset,
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scansize);
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}
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public synchronized void
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setPixels (int x, int y, int width, int height, ColorModel cm, int[] pixels,
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int offset, int scansize)
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{
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loading = true;
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if (!isCacheable)
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return;
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if (cm != model || pixelCache == null)
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{
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isCacheable = false;
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return;
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}
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if (scansize == width)
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{
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System.arraycopy (pixels, offset,
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pixelCache, y * this.width + x,
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pixels.length - offset);
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}
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else // skip over scansize-width for each row
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{
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for (int i = 0; i < height; i++)
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System.arraycopy (pixels, offset + (i * scansize),
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pixelCache, (y + i) * this.width + x,
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width);
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}
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}
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public synchronized void
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imageComplete (int status)
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{
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if (status == ImageConsumer.STATICIMAGEDONE && isCacheable)
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isLoaded = true;
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if (status == ImageConsumer.SINGLEFRAMEDONE)
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isCacheable = false;
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source.removeConsumer (this);
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}
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public synchronized void
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startProduction (GtkImagePainter painter)
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{
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if (isLoaded)
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{
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painter.setDimensions (width, height);
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painter.setPixels (0, 0, width, height, model, pixelCache, 0, width);
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}
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else
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{
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source.startProduction (painter);
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source.removeConsumer (painter);
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}
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}
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private int[]
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convertPixels (byte[] pixels)
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{
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int ret[] = new int[pixels.length];
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for (int i = 0; i < pixels.length; i++)
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ret[i] = pixels[i];
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return ret;
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}
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synchronized int
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checkImage ()
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{
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int bits = 0;
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if (width != -1)
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bits |= ImageObserver.WIDTH;
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if (height != -1)
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bits |= ImageObserver.HEIGHT;
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if (props != null)
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bits |= ImageObserver.PROPERTIES;
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if (loading)
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bits |= ImageObserver.SOMEBITS;
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if (isLoaded)
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bits |= ImageObserver.ALLBITS;
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return bits;
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}
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}
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