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package gnu.java.awt.peer.gtk;
import java.awt.*;
import java.util.*;
import java.awt.image.*;
public class GtkImage extends Image implements ImageConsumer
{
int width = -1, height = -1;
Hashtable props = null;
boolean isLoaded = false;
boolean isCacheable = true;
Vector widthObservers = new Vector ();
Vector heightObservers = new Vector ();
Vector propertyObservers = new Vector ();
ImageProducer source;
Graphics g;
/* Variables in which we stored cached data, if possible.
An image is cached if the following properties are true:
1. The ColorModel passed into setColorModel is the same ColorModel
passed to all invocations of setPixels.
2. The image contains a single frame.
*/
int[] pixelCache;
ColorModel model;
public
GtkImage (ImageProducer producer, Graphics g)
{
source = producer;
this.g = g;
source.addConsumer (this);
}
public synchronized int
getWidth (ImageObserver observer)
{
if (width == -1)
widthObservers.addElement (observer);
return width;
}
public synchronized int
getHeight (ImageObserver observer)
{
if (height == -1)
heightObservers.addElement (observer);
return height;
}
public ImageProducer
getSource ()
{
return source;
}
public Graphics
getGraphics ()
{
return g;
}
public synchronized Object
getProperty (String name, ImageObserver observer)
{
if (props == null)
{
propertyObservers.addElement (observer);
return null;
}
Object value = props.get (name);
return (value == null) ? UndefinedProperty : value;
}
public synchronized void
flush ()
{
isLoaded = false;
isCacheable = true;
width = height = -1;
props = null;
pixelCache = null;
model = null;
source.removeConsumer (this);
source.addConsumer (this);
}
public boolean
isLoaded ()
{
return isLoaded;
}
/* ImageConsumer methods */
public synchronized void
setDimensions (int width, int height)
{
pixelCache = new int[width*height];
this.width = width;
this.height = height;
for (int i = 0; i < widthObservers.size (); i++)
{
ImageObserver io = (ImageObserver) widthObservers.elementAt (i);
io.imageUpdate (this, ImageObserver.WIDTH, -1, -1, width, height);
}
for (int i = 0; i < heightObservers.size (); i++)
{
ImageObserver io = (ImageObserver) heightObservers.elementAt (i);
io.imageUpdate (this, ImageObserver.HEIGHT, -1, -1, width, height);
}
}
public synchronized void
setProperties (Hashtable props)
{
this.props = props;
for (int i = 0; i < propertyObservers.size (); i++)
{
ImageObserver io = (ImageObserver) propertyObservers.elementAt (i);
io.imageUpdate (this, ImageObserver.PROPERTIES, -1, -1, width, height);
}
}
public synchronized void
setColorModel (ColorModel model)
{
if (this.model == null || this.model == model)
this.model = model;
else
isCacheable = false;
}
public synchronized void
setHints (int flags)
{
}
public synchronized void
setPixels (int x, int y, int width, int height, ColorModel cm, byte[] pixels,
int offset, int scansize)
{
setPixels (x, y, width, height, cm, convertPixels (pixels), offset,
scansize);
}
public synchronized void
setPixels (int x, int y, int width, int height, ColorModel cm, int[] pixels,
int offset, int scansize)
{
if (!isCacheable)
return;
if (cm != model || pixelCache == null)
{
isCacheable = false;
return;
}
System.arraycopy (pixels, offset,
pixelCache, y * this.width + x,
pixels.length - offset);
}
public synchronized void
imageComplete (int status)
{
if (status == ImageConsumer.STATICIMAGEDONE && isCacheable)
isLoaded = true;
if (status == ImageConsumer.SINGLEFRAMEDONE)
isCacheable = false;
source.removeConsumer (this);
}
public synchronized void
startProduction (GtkImagePainter painter)
{
if (isLoaded)
painter.setPixels (0, 0, width, height, model, pixelCache, 0, width);
else
{
source.startProduction (painter);
source.removeConsumer (painter);
}
}
private int[]
convertPixels (byte[] pixels)
{
int ret[] = new int[pixels.length];
for (int i = 0; i < pixels.length; i++)
ret[i] = pixels[i];
return ret;
}
}
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