01: /*
02: * $RCSfile: DepthComponentNativeRetained.java,v $
03: *
04: * Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
06: *
07: * This code is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License version 2 only, as
09: * published by the Free Software Foundation. Sun designates this
10: * particular file as subject to the "Classpath" exception as provided
11: * by Sun in the LICENSE file that accompanied this code.
12: *
13: * This code is distributed in the hope that it will be useful, but WITHOUT
14: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: * version 2 for more details (a copy is included in the LICENSE file that
17: * accompanied this code).
18: *
19: * You should have received a copy of the GNU General Public License version
20: * 2 along with this work; if not, write to the Free Software Foundation,
21: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
22: *
23: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
24: * CA 95054 USA or visit www.sun.com if you need additional information or
25: * have any questions.
26: *
27: * $Revision: 1.5 $
28: * $Date: 2008/02/28 20:17:21 $
29: * $State: Exp $
30: */
31:
32: package javax.media.j3d;
33:
34: /**
35: * A 2D array of depth (Z) values stored in the most efficient format for a
36: * particular device. Values are not accessible by the user and may only be
37: * used to read the Z values and subsequently write them back.
38: */
39:
40: class DepthComponentNativeRetained extends DepthComponentRetained {
41: // Change this to whatever native format is best...
42: int depthData[];
43:
44: /**
45: * Constructs a new native depth (z-buffer) component object with the
46: * specified width and height.
47: * @param width the width of the array of depth values
48: * @param height the height of the array of depth values
49: */
50: void initialize(int width, int height) {
51: type = DEPTH_COMPONENT_TYPE_NATIVE;
52: depthData = new int[width * height];
53: this .width = width;
54: this .height = height;
55: }
56:
57: /**
58: * Copies the depth data from this object to the specified array.
59: * @param depthData array of ints that will receive a copy of
60: * the depth data
61: */
62: void getDepthData(int[] depthData) {
63: int i;
64: for (i = 0; i < this .depthData.length; i++)
65: depthData[i] = this .depthData[i];
66: }
67:
68: /**
69: * retrieve depth data from input buffer
70: */
71: final void retrieveDepth(int[] buf, int wRead, int hRead) {
72: int srcOffset, dstOffset, i;
73:
74: // Yup -> Ydown
75: for (srcOffset = (hRead - 1) * wRead, dstOffset = 0, i = 0; i < hRead; i++, srcOffset -= wRead, dstOffset += width) {
76:
77: System.arraycopy(buf, srcOffset, depthData, dstOffset,
78: wRead);
79: }
80: }
81: }
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