1 /*
2 * Copyright (c) 2011, 2013, 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 com.sun.javafx.util;
27
28 import com.sun.javafx.geom.BaseBounds;
29 import com.sun.javafx.geom.RectBounds;
30 import com.sun.javafx.geom.transform.Affine3D;
31 import com.sun.javafx.geom.transform.BaseTransform;
32 import com.sun.javafx.geom.transform.GeneralTransform3D;
33
34 /**************************************************************************
35 * *
36 * Temporary state, used to reduce the occurrence of temporary garbage *
37 * while computing things such as bounds and transforms, and while *
38 * picking. Since these operations happen extremely often and must be *
39 * very fast, we need to reduce the load on the garbage collector. *
40 * *
41 *************************************************************************/
42 public final class TempState {
43 /**
44 * A temporary rect used for computing bounds by the various bounds
45 * variables. This bounds starts life as a RectBounds, but may be promoted
46 * to a BoxBounds if there is a 3D transform mixed into its computation.
47 */
48 public BaseBounds bounds = new RectBounds(0, 0, -1, -1);
49
50 /**
51 * A temporary affine transform used when picking to avoid creating
52 * temporary garbage.
53 */
54 public final BaseTransform pickTx = new Affine3D();
55
56 /**
57 * A temporary affine transform used by the path transition to avoid
58 * creating temporary garbage.
59 */
60 public final Affine3D leafTx = new Affine3D();
61
62 /**
63 * A temporary point used for picking and other purposes.
64 */
65 public final com.sun.javafx.geom.Point2D point =
66 new com.sun.javafx.geom.Point2D(0, 0);
67
68 public final com.sun.javafx.geom.Vec3d vec3d =
69 new com.sun.javafx.geom.Vec3d(0, 0, 0);
70
71
72 /**
73 * A temporary general transform used by LOD helper method, in node,
74 * to compute area in scene.
75 */
76 public final GeneralTransform3D projViewTx = new GeneralTransform3D();
77
78 /**
79 * A temporary affine transform used by the LOD helper method to get an
80 * affine transform.
81 */
82 public final Affine3D tempTx = new Affine3D();
83
84 private static final ThreadLocal<TempState> tempStateRef =
85 new ThreadLocal<TempState>() {
86 @Override
87 protected TempState initialValue() {
88 return new TempState();
89 }
90 };
91
92 private TempState() {
93 }
94
95 public static TempState getInstance() {
96 return tempStateRef.get();
97 }
98 }