01: /*
02: * $RCSfile: DepthComponentFloatRetained.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 in floating point format in the range [0,1].
36: * A value of 0.0 indicates the closest Z value to the user while a value of
37: * 1.0 indicates the farthest Z value.
38: */
39:
40: class DepthComponentFloatRetained extends DepthComponentRetained {
41: float depthData[];
42:
43: /**
44: * Constructs a new floating-point depth (z-buffer) component object with
45: * the specified width and height.
46: * @param width the width of the array of depth values
47: * @param height the height of the array of depth values
48: */
49: void initialize(int width, int height) {
50: type = DEPTH_COMPONENT_TYPE_FLOAT;
51: depthData = new float[width * height];
52: this .width = width;
53: this .height = height;
54: }
55:
56: /**
57: * Copies the specified depth data to this object.
58: * @param depthData array of floats containing the depth data
59: */
60: void setDepthData(float[] depthData) {
61: int i;
62: for (i = 0; i < depthData.length; i++)
63: this .depthData[i] = depthData[i];
64: }
65:
66: /**
67: * Copies the depth data from this object to the specified array.
68: * @param depthData array of floats that will receive a copy of
69: * the depth data
70: */
71: void getDepthData(float[] depthData) {
72: int i;
73: for (i = 0; i < this .depthData.length; i++)
74: depthData[i] = this .depthData[i];
75: }
76:
77: /*
78: * retrieve depth data from input buffer
79: */
80: final void retrieveDepth(float[] buf, int wRead, int hRead) {
81: int srcOffset, dstOffset, i;
82:
83: // Yup -> Ydown
84: for (srcOffset = (hRead - 1) * wRead, dstOffset = 0, i = 0; i < hRead; i++, srcOffset -= wRead, dstOffset += width) {
85:
86: System.arraycopy(buf, srcOffset, depthData, dstOffset,
87: wRead);
88: }
89: }
90: }
|