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
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Copyright (c) 2003 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.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.jogamp.opengl.impl;
import javax.media.opengl.*;
import java.util.*;
// FIXME: refactor Java SE dependencies
//import java.util.regex.*;
import java.lang.reflect.*;
/**
* A utility object intended to be used by implementations to act as a cache
* of which OpenGL extensions are currently available on both the host machine
* and display.
*/
public final class ExtensionAvailabilityCache {
private static final boolean DEBUG = GLContextImpl.DEBUG;
private static final boolean DEBUG_AVAILABILITY = Debug.isPropertyDefined("jogl.debug.ExtensionAvailabilityCache", true);
ExtensionAvailabilityCache(GLContextImpl context)
{
this.context = context;
}
/**
* Flush the cache. The cache will be rebuilt lazily as calls to {@link
* #isExtensionAvailable(String)} are received.
*/
public void flush()
{
if(DEBUG) {
System.out.println("ExtensionAvailabilityCache: Flush availability OpenGL "+context.getGLVersion());
}
availableExtensionCache.clear();
initialized = false;
}
/**
* Flush the cache and rebuild the cache.
*/
public void reset() {
flush();
initAvailableExtensions();
}
public boolean isInitialized() {
return initialized && !availableExtensionCache.isEmpty() ;
}
public boolean isExtensionAvailable(String glExtensionName) {
initAvailableExtensions();
return availableExtensionCache.contains(mapGLExtensionName(glExtensionName));
}
public String getPlatformExtensionsString() {
initAvailableExtensions();
return glXExtensions;
}
public String getGLExtensions() {
initAvailableExtensions();
if(DEBUG) {
System.err.println("ExtensionAvailabilityCache: getGLExtensions() called");
}
return glExtensions;
}
private void initAvailableExtensions() {
GL gl = context.getGL();
// if hash is empty (meaning it was flushed), pre-cache it with the list
// of extensions that are in the GL_EXTENSIONS string
if (availableExtensionCache.isEmpty() || !initialized) {
if (DEBUG) {
System.err.println("ExtensionAvailabilityCache: Pre-caching init "+gl+", OpenGL "+context.getGLVersion());
}
boolean useGetStringi = false;
if ( gl.isGL2GL3() ) {
if ( ! gl.isFunctionAvailable("glGetStringi") ) {
if(DEBUG) {
System.err.println("GLContext: GL >= 3.1 usage, but no glGetStringi");
}
} else {
useGetStringi = true;
}
}
if (DEBUG) {
System.err.println("ExtensionAvailabilityCache: Pre-caching extension availability OpenGL "+context.getGLVersion()+
", use "+ ( useGetStringi ? "glGetStringi" : "glGetString" ) );
}
StringBuffer sb = new StringBuffer();
if(useGetStringi) {
GL2GL3 gl2gl3 = gl.getGL2GL3();
int[] numExtensions = { 0 } ;
gl2gl3.glGetIntegerv(gl2gl3.GL_NUM_EXTENSIONS, numExtensions, 0);
for (int i = 0; i < numExtensions[0]; i++) {
sb.append(gl2gl3.glGetStringi(gl2gl3.GL_EXTENSIONS, i));
if(i < numExtensions[0]) {
sb.append(" ");
}
}
} else {
sb.append(gl.glGetString(GL.GL_EXTENSIONS));
}
glExtensions = sb.toString();
glXExtensions = context.getPlatformExtensionsString();
sb.append(" ");
sb.append(glXExtensions);
String allAvailableExtensions = sb.toString();
if (DEBUG_AVAILABILITY) {
System.err.println("ExtensionAvailabilityCache: Available extensions: " + allAvailableExtensions);
System.err.println("ExtensionAvailabilityCache: GL vendor: " + gl.glGetString(GL.GL_VENDOR));
}
StringTokenizer tok = new StringTokenizer(allAvailableExtensions);
while (tok.hasMoreTokens()) {
String availableExt = tok.nextToken().trim();
availableExt = availableExt.intern();
availableExtensionCache.add(availableExt);
if (DEBUG_AVAILABILITY) {
System.err.println("ExtensionAvailabilityCache: Available: " + availableExt);
}
}
int major[] = new int[] { context.getGLVersionMajor() };
int minor[] = new int[] { context.getGLVersionMinor() };
if( !gl.isGL3() && !gl.isGL4() &&
( major[0] > 3 ||
( major[0] == 3 && minor[0] >= 1 ) ) ) {
// downsize version to 3.0 in case we are not using GL3 (>=3.1)
major[0] = 3;
minor[0] = 0;
}
while (GLContext.isValidGLVersion(major[0], minor[0])) {
availableExtensionCache.add("GL_VERSION_" + major[0] + "_" + minor[0]);
if (DEBUG) {
System.err.println("ExtensionAvailabilityCache: Added GL_VERSION_" + major[0] + "_" + minor[0] + " to known extensions");
}
if(!GLContext.decrementGLVersion(major, minor)) break;
}
// put a dummy var in here so that the cache is no longer empty even if
// no extensions are in the GL_EXTENSIONS string
availableExtensionCache.add("<INTERNAL_DUMMY_PLACEHOLDER>");
initialized = true;
}
}
// FIXME: hack to re-enable GL_NV_vertex_array_range extension after
// recent upgrade to new wglext.h and glxext.h headers
private static String mapGLExtensionName(String extensionName) {
if (extensionName != null &&
(extensionName.equals("WGL_NV_vertex_array_range") ||
extensionName.equals("GLX_NV_vertex_array_range")))
return "GL_NV_vertex_array_range";
return extensionName;
}
//----------------------------------------------------------------------
// Internals only below this point
//
private boolean initialized = false;
private String glExtensions = null;
private String glXExtensions = null;
private HashSet availableExtensionCache = new HashSet(50);
private GLContextImpl context;
}
|
