Showing the changes to java/pkg/sun/java2d/loops/RenderCache.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,103 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.java2d.loops; | ||
| 27 | |||
| 28 | public final class RenderCache { | ||
| 29 | final class Entry { | ||
| 30 | private SurfaceType src; | ||
| 31 | private CompositeType comp; | ||
| 32 | private SurfaceType dst; | ||
| 33 | private Object value; | ||
| 34 | |||
| 35 | public Entry(SurfaceType src, | ||
| 36 | CompositeType comp, | ||
| 37 | SurfaceType dst, | ||
| 38 | Object value) | ||
| 39 | { | ||
| 40 | this.src = src; | ||
| 41 | this.comp = comp; | ||
| 42 | this.dst = dst; | ||
| 43 | this.value = value; | ||
| 44 | } | ||
| 45 | |||
| 46 | public boolean matches(SurfaceType src, | ||
| 47 | CompositeType comp, | ||
| 48 | SurfaceType dst) | ||
| 49 | { | ||
| 50 | // bug 4725045: using equals() causes different SurfaceType | ||
| 51 | // objects with the same strings to match in the cache, which is | ||
| 52 | // not the behavior we want. Constrain the match to succeed only | ||
| 53 | // on object matches instead. | ||
| 54 | return ((this.src == src) && | ||
| 55 | (this.comp == comp) && | ||
| 56 | (this.dst == dst)); | ||
| 57 | } | ||
| 58 | |||
| 59 | public Object getValue() { | ||
| 60 | return value; | ||
| 61 | } | ||
| 62 | } | ||
| 63 | |||
| 64 | private Entry entries[]; | ||
| 65 | |||
| 66 | public RenderCache(int size) { | ||
| 67 | entries = new Entry[size]; | ||
| 68 | } | ||
| 69 | |||
| 70 | public synchronized Object get(SurfaceType src, | ||
| 71 | CompositeType comp, | ||
| 72 | SurfaceType dst) | ||
| 73 | { | ||
| 74 | int max = entries.length - 1; | ||
| 75 | for (int i = max; i >= 0; i--) { | ||
| 76 | Entry e = entries[i]; | ||
| 77 | if (e == null) { | ||
| 78 | break; | ||
| 79 | } | ||
| 80 | if (e.matches(src, comp, dst)) { | ||
| 81 | if (i < max - 4) { | ||
| 82 | System.arraycopy(entries, i+1, entries, i, max - i); | ||
| 83 | entries[max] = e; | ||
| 84 | } | ||
| 85 | return e.getValue(); | ||
| 86 | } | ||
| 87 | } | ||
| 88 | |||
| 89 | return null; | ||
| 90 | } | ||
| 91 | |||
| 92 | public synchronized void put(SurfaceType src, | ||
| 93 | CompositeType comp, | ||
| 94 | SurfaceType dst, | ||
| 95 | Object value) | ||
| 96 | { | ||
| 97 | Entry e = new Entry(src, comp, dst, value); | ||
| 98 | |||
| 99 | int num = entries.length; | ||
| 100 | System.arraycopy(entries, 1, entries, 0, num - 1); | ||
| 101 | entries[num - 1] = e; | ||
| 102 | } | ||
| 103 | } | ||