mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 08:03:41 +08:00
9e9e204234
2003-04-19 Scott Gilbertson <scottg@mantatest.com> * gnu/awt/xlib/XGraphics.java (XGraphics): Use new GC.create. (dispose): Null metrics. * gnu/awt/xlib/XToolkit.java (sync): Implement. * gnu/gcj/xlib/Clip.java (dispose): Change name of native from finalize. (finalize): Call dispose. * gnu/gcj/xlib/Drawable.java (gcCache): New field. (gcCachedCount): New field. (finalize): New method. (putGCInCache): New method. (getGCFromCache): New method. * gnu/gcj/xlib/GC.java (GC): Make protected. (clone): Get new GC from cache if possible. (create): New static method. (dispose): Save old GC in cache. * gnu/gcj/xlib/natClip.cc (dispose): Check for null before deleting. * gnu/gcj/xlib/natGC.cc (initStructure): Call XCreateGC only if gc is null. * gnu/gcj/xlib/Pixmap.java (Pixmap): Use new GC.create. * java/awt/Container.java (visitChild): Dispose gfx2 when finished. From-SVN: r65827
117 lines
2.9 KiB
Java
117 lines
2.9 KiB
Java
/* Copyright (C) 1999, 2000 Free Software Foundation
|
|
|
|
This file is part of libgcj.
|
|
|
|
This software is copyrighted work licensed under the terms of the
|
|
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
|
|
details. */
|
|
|
|
package gnu.gcj.xlib;
|
|
|
|
import java.awt.Rectangle;
|
|
|
|
/** An X11 drawable.
|
|
*
|
|
* @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
|
|
*/
|
|
public class Drawable extends XID
|
|
{
|
|
private GC[] gcCache = new GC[10];
|
|
private int gcCachedCount = 0;
|
|
|
|
public Drawable(Display display, int xid)
|
|
{
|
|
super(display, xid);
|
|
}
|
|
|
|
/**
|
|
* Gets as much as possible of the image data within the requested
|
|
* region. Data from obscured parts of windows may not be
|
|
* retrievable.
|
|
*
|
|
* @param dest where to place the image data.
|
|
*
|
|
* @return the actual region of image data that was retrieved.
|
|
*/
|
|
public Rectangle copyIntoXImage(XImage dest, Rectangle bounds,
|
|
int destX, int destY)
|
|
{
|
|
Rectangle newBounds = null;
|
|
int tries = 5;
|
|
while (!bounds.isEmpty())
|
|
{
|
|
if (copyIntoXImageImpl(dest, bounds.x, bounds.y,
|
|
bounds.width, bounds.height,
|
|
destX, destY))
|
|
return bounds;
|
|
|
|
// failed, likely due to wrong bounds...
|
|
|
|
newBounds = getBounds(newBounds);
|
|
|
|
bounds = newBounds.intersection(bounds);
|
|
|
|
tries--;
|
|
|
|
if (tries < 0)
|
|
throw new RuntimeException("copyIntoXImage is buggy");
|
|
|
|
}
|
|
|
|
return bounds; // always empty
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Performs an XGetSubImage. This method will fail if the X server
|
|
* does not possess the requested image data. This might occur when
|
|
* requesting the image date of a window that is partially obscured.
|
|
*
|
|
* @param desitantionImage where to place the image data
|
|
*
|
|
* @return false if method was unable to read the requested region.
|
|
*/
|
|
private native boolean copyIntoXImageImpl(XImage destinationImage,
|
|
int x, int y,
|
|
int width, int height,
|
|
int destX, int destY);
|
|
|
|
public native Rectangle getBounds(Rectangle rv);
|
|
|
|
private static final String MSG_XGETSUBIMAGE_FAILED =
|
|
"XGetSubImage() failed.";
|
|
|
|
protected void finalize() throws Throwable
|
|
{
|
|
// Dispose all the cached GCs, to reduce X server resource usage
|
|
for (int i=0; i<gcCachedCount; i++)
|
|
gcCache[i].disposeImpl ();
|
|
gcCachedCount = 0;
|
|
super.finalize();
|
|
}
|
|
|
|
/** Put a GC in the cache for this drawable, so it can be retrieved later.
|
|
* @param gc The GC to put
|
|
*/
|
|
void putGCInCache (GC gc)
|
|
{
|
|
if (gcCachedCount >= gcCache.length)
|
|
{
|
|
// List full - extend it to double its present size
|
|
GC[] oldList = gcCache;
|
|
gcCache = new GC[oldList.length*2];
|
|
System.arraycopy (oldList,0,gcCache,0,oldList.length);
|
|
}
|
|
gcCache[gcCachedCount++] = gc;
|
|
}
|
|
|
|
/** Get a GC from the cache, if available
|
|
* @return A GC from the cache, or null if the cache is empty
|
|
*/
|
|
GC getGCFromCache ()
|
|
{
|
|
return (gcCachedCount>0) ? gcCache[--gcCachedCount] : null;
|
|
}
|
|
}
|