1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
*/
package com.jogamp.opengl.impl;
import java.lang.reflect.*;
import java.nio.*;
/** Internal copy of selected routines from BufferUtil to avoid
outward dependencies on com.jogamp.opengl.util package. */
public class InternalBufferUtil {
public static final int SIZEOF_BYTE = 1;
public static final int SIZEOF_SHORT = 2;
public static final int SIZEOF_INT = 4;
public static final int SIZEOF_FLOAT = 4;
public static final int SIZEOF_LONG = 8;
public static final int SIZEOF_DOUBLE = 8;
//----------------------------------------------------------------------
// Allocation routines
//
/** Allocates a new direct ByteBuffer with the specified number of
elements. The returned buffer will have its byte order set to
the host platform's native byte order. */
public static ByteBuffer newByteBuffer(int numElements) {
ByteBuffer bb = ByteBuffer.allocateDirect(numElements);
nativeOrder(bb);
return bb;
}
/** Allocates a new direct DoubleBuffer with the specified number of
elements. The returned buffer will have its byte order set to
the host platform's native byte order. */
public static DoubleBuffer newDoubleBuffer(int numElements) {
ByteBuffer bb = newByteBuffer(numElements * SIZEOF_DOUBLE);
return bb.asDoubleBuffer();
}
/** Allocates a new direct IntBuffer with the specified number of
elements. The returned buffer will have its byte order set to
the host platform's native byte order. */
public static IntBuffer newIntBuffer(int numElements) {
ByteBuffer bb = newByteBuffer(numElements * SIZEOF_INT);
return bb.asIntBuffer();
}
/** Allocates a new direct ShortBuffer with the specified number of
elements. The returned buffer will have its byte order set to
the host platform's native byte order. */
public static ShortBuffer newShortBuffer(int numElements) {
ByteBuffer bb = newByteBuffer(numElements * SIZEOF_SHORT);
return bb.asShortBuffer();
}
/** Allocates a new direct FloatBuffer with the specified number of
elements. The returned buffer will have its byte order set to
the host platform's native byte order. */
public static FloatBuffer newFloatBuffer(int numElements) {
ByteBuffer bb = newByteBuffer(numElements * SIZEOF_FLOAT);
return bb.asFloatBuffer();
}
//----------------------------------------------------------------------
// Copy routines (type-to-ByteBuffer)
//
/** Copies the <i>remaining</i> elements (as defined by
<code>limit() - position()</code>) in the passed FloatBuffer
into a newly-allocated direct ByteBuffer. The returned buffer
will have its byte order set to the host platform's native byte
order. The position of the newly-allocated buffer will be zero,
and the position of the passed buffer is unchanged (though its
mark is changed). */
public static ByteBuffer copyFloatBufferAsByteBuffer(FloatBuffer orig) {
ByteBuffer dest = newByteBuffer(orig.remaining() * SIZEOF_FLOAT);
dest.asFloatBuffer().put(orig);
dest.rewind();
return dest;
}
/** Copies the <i>remaining</i> elements (as defined by
<code>limit() - position()</code>) in the passed IntBuffer into
a newly-allocated direct ByteBuffer. The returned buffer will
have its byte order set to the host platform's native byte
order. The position of the newly-allocated buffer will be zero,
and the position of the passed buffer is unchanged (though its
mark is changed). */
public static ByteBuffer copyIntBufferAsByteBuffer(IntBuffer orig) {
ByteBuffer dest = newByteBuffer(orig.remaining() * SIZEOF_INT);
dest.asIntBuffer().put(orig);
dest.rewind();
return dest;
}
/** Copies the <i>remaining</i> elements (as defined by
<code>limit() - position()</code>) in the passed ShortBuffer
into a newly-allocated direct ByteBuffer. The returned buffer
will have its byte order set to the host platform's native byte
order. The position of the newly-allocated buffer will be zero,
and the position of the passed buffer is unchanged (though its
mark is changed). */
public static ByteBuffer copyShortBufferAsByteBuffer(ShortBuffer orig) {
ByteBuffer dest = newByteBuffer(orig.remaining() * SIZEOF_SHORT);
dest.asShortBuffer().put(orig);
dest.rewind();
return dest;
}
/** Copies the <i>remaining</i> elements (as defined by
<code>limit() - position()</code>) in the passed ByteBuffer into
a newly-allocated direct ByteBuffer. The returned buffer will
have its byte order set to the host platform's native byte
order. The position of the newly-allocated buffer will be zero,
and the position of the passed buffer is unchanged (though its
mark is changed). */
public static ByteBuffer copyByteBuffer(ByteBuffer orig) {
ByteBuffer dest = newByteBuffer(orig.remaining());
dest.put(orig);
dest.rewind();
return dest;
}
//----------------------------------------------------------------------
// Conversion routines
//
public static float[] getFloatArray(double[] source) {
int i=source.length;
float[] dest = new float[i--];
while(i>=0) { dest[i]=(float)source[i]; i--; }
return dest;
}
public static ByteBuffer nativeOrder(ByteBuffer buf) {
if (!isCDCFP) {
try {
if (byteOrderClass == null) {
byteOrderClass = Class.forName("java.nio.ByteOrder");
orderMethod = ByteBuffer.class.getMethod("order", new Class[] { byteOrderClass });
Method nativeOrderMethod = byteOrderClass.getMethod("nativeOrder", null);
nativeOrderObject = nativeOrderMethod.invoke(null, null);
}
} catch (Throwable t) {
// Must be running on CDC / FP
isCDCFP = true;
}
if (!isCDCFP) {
try {
orderMethod.invoke(buf, new Object[] { nativeOrderObject });
} catch (Throwable t) {
}
}
}
return buf;
}
//----------------------------------------------------------------------
// Internals only below this point
//
// NOTE that this work must be done reflectively at the present time
// because this code must compile and run correctly on both CDC/FP and J2SE
private static boolean isCDCFP;
private static Class byteOrderClass;
private static Object nativeOrderObject;
private static Method orderMethod;
}
|
