2003/09/24 07:33:33

[org.ibex.core.git] / src / org / xwt / plat / GCJ.java

diff --git a/src/org/xwt/plat/GCJ.java b/src/org/xwt/plat/GCJ.java
index 6f545c0..028f0ba 100644 (file)
--- a/src/org/xwt/plat/GCJ.java
+++ b/src/org/xwt/plat/GCJ.java
@@ -1,4 +1,4 @@
-// Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
 package org.xwt.plat;
 
 import org.xwt.*;
@@ -19,36 +19,36 @@ public abstract class GCJ extends Platform {
     private static Class c8 = gnu.java.locale.Calendar_en.class;
     private static Class c9 = gnu.java.locale.Calendar_en_US.class;
 
-    protected org.xwt.Weak _getWeak(Object o) { return new Java2Weak(o); }
+    protected native InputStream _getBuiltinInputStream();
 
-    private static class Java2Weak extends java.lang.ref.WeakReference implements org.xwt.Weak {
-        public Java2Weak(Object o) { super(o); }
-    }
-        
-    // FIXME
-    protected ImageDecoder _decodeJPEG(InputStream is, String name) {
-        try {
-            return new JPEG(is);
-        } catch (Exception e) {
-            Log.log(this, "Exception while decoding JPEG image " + name);
-            Log.log(this, e);
-            return null;
-        }
-    }
+    protected native Picture _decodeJPEG(InputStream is, String name);
 
-    /** Converts an InputStream carrying a JPEG image into an ARGB int[] */
-    private static class JPEG extends ImageDecoder {
-        int[] data;
-        byte[] buffer;
-        int width, height;
-        InputStream is;
-        
-        public final int[] getData() { return data; }
-        public final int getWidth() { return width; }
-        public final int getHeight() { return height; }
-        private JPEG(InputStream is) { this.is = is; nativeDecompress(); buffer = null; }
-        private native void nativeDecompress();
+    // FEATURE: This could be optimized (a lot) by using a custom hashtable
+    public final static class Retainer {
+        private static Hash table = new Hash();
+        private final static class Key {
+            private Object o;
+            public Key(Object o) { this.o = o; }
+            public int hashCode() { return o == null ? 0 : o.hashCode(); }
+            public boolean equals(Object o2) { return (o2 instanceof Key) && ((Key)o2).o == o; }
+        }
+        private final static class Entry {
+            private int refCount;
+            public Entry() { inc(); }
+            public void inc() { refCount++; }
+            public boolean dec() { return --refCount == 0; }
+        }
+        public static synchronized void retain(Object o) {
+            Key k = new Key(o);
+            Entry r = (Entry) table.get(k);
+            if(r == null) table.put(k,new Entry());
+            else r.inc();
+        }
+        public static synchronized void release(Object o) {
+            Key k = new Key(o);
+            Entry e = (Entry) table.get(k);
+            if(e == null) throw new Error("Retainer::Release on unknown object");
+            if(e.dec()) { table.remove(k); }
+        }
     }
-
 }
-