- private static class JPEG implements 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();
+ 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();
+ }
+
+ // FIXME: 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); }
+ }