/* * Copyright (c) 1999, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.java2d.loops;public final class RenderCache { final class Entry { private SurfaceType src; private CompositeType comp; private SurfaceType dst; private Object value; public Entry(SurfaceType src, CompositeType comp, SurfaceType dst, Object value) { this.src = src; this.comp = comp; this.dst = dst; this.value = value; } public boolean matches(SurfaceType src, CompositeType comp, SurfaceType dst) { // bug 4725045: using equals() causes different SurfaceType // objects with the same strings to match in the cache, which is // not the behavior we want. Constrain the match to succeed only // on object matches instead. return ((this.src == src) && (this.comp == comp) && (this.dst == dst)); } public Object getValue() { return value; } } private Entry entries[]; public RenderCache(int size) { entries = new Entry[size]; } public synchronized Object get(SurfaceType src, CompositeType comp, SurfaceType dst) { int max = entries.length - 1; for (int i = max; i >= 0; i--) { Entry e = entries[i]; if (e == null) { break; } if (e.matches(src, comp, dst)) { if (i < max - 4) { System.arraycopy(entries, i+1, entries, i, max - i); entries[max] = e; } return e.getValue(); } } return null; } public synchronized void put(SurfaceType src, CompositeType comp, SurfaceType dst, Object value) { Entry e = new Entry(src, comp, dst, value); int num = entries.length; System.arraycopy(entries, 1, entries, 0, num - 1); entries[num - 1] = e; }}
/*
* Copyright (c) 1999, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.java2d.loops;
public final class RenderCache {
final class Entry {
private SurfaceType src;
private CompositeType comp;
private SurfaceType dst;
private Object value;
public Entry(SurfaceType src,
CompositeType comp,
SurfaceType dst,
Object value)
{
this.src = src;
this.comp = comp;
this.dst = dst;
this.value = value;
}
public boolean matches(SurfaceType src,
CompositeType comp,
SurfaceType dst)
{
// bug 4725045: using equals() causes different SurfaceType
// objects with the same strings to match in the cache, which is
// not the behavior we want. Constrain the match to succeed only
// on object matches instead.
return ((this.src == src) &&
(this.comp == comp) &&
(this.dst == dst));
}
public Object getValue() {
return value;
}
}
private Entry entries[];
public RenderCache(int size) {
entries = new Entry[size];
}
public synchronized Object get(SurfaceType src,
CompositeType comp,
SurfaceType dst)
{
int max = entries.length - 1;
for (int i = max; i >= 0; i--) {
Entry e = entries[i];
if (e == null) {
break;
}
if (e.matches(src, comp, dst)) {
if (i < max - 4) {
System.arraycopy(entries, i+1, entries, i, max - i);
entries[max] = e;
}
return e.getValue();
}
}
return null;
}
public synchronized void put(SurfaceType src,
CompositeType comp,
SurfaceType dst,
Object value)
{
Entry e = new Entry(src, comp, dst, value);
int num = entries.length;
System.arraycopy(entries, 1, entries, 0, num - 1);
entries[num - 1] = e;
}
}