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
|
/*
* 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
* MIDROSYSTEMS, 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 net.java.games.jogl;
public abstract class GLContext {
public static final int CONTEXT_NOT_CURRENT = 0;
public static final int CONTEXT_CURRENT = 1;
public static final int CONTEXT_CURRENT_NEW = 2;
private static ThreadLocal currentContext = new ThreadLocal();
/**
* Returns the GLDrawable to which this context may be used to
* draw.
*/
// FIXME
// public abstract GLDrawable getGLDrawable();
/**
* Makes this GLContext current on the calling thread.
*
* There are two return values that indicate success and one that
* indicates failure. A return value of CONTEXT_CURRENT_NEW
* indicates that that context has been made current, and that
* this is the first time this context has been made current, or
* that the state of the underlying context or drawable may have
* changed since the last time this context was made current. In
* this case, the application may wish to initialize the state. A
* return value of CONTEXT_CURRENT indicates that the context has
* been made currrent, with its previous state restored.
*
* If the context could not be made current (for example, because
* the underlying drawable has not ben realized on the display) ,
* a value of CONTEXT_NOT_CURRENT is returned.
*
* If the context is in use by another thread at the time of the
* call, then if isSynchronized() is true the call will
* block. If isSynchronized() is false, an exception will be
* thrown and the context will remain current on the other thread.
*
* @return CONTEXT_CURRENT if the context was successfully made current
* @return CONTEXT_CURRENT_NEW if the context was successfully made
* current, but need to be initialized.
*
* @return CONTEXT_NOT_CURRENT if the context could not be made current.
*
* @throws GLException if synchronization is disabled and the
* context is current on another thread, or because the context
* could not be created or made current due to non-recoverable,
* window system-specific errors.
*/
public abstract int makeCurrent() throws GLException;
/**
* Releases control of this GLContext from the current thread.
*
* @throw GLException if the context had not previously been made
* current on the current thread
*/
public abstract void release() throws GLException;
/**
* Returns the context which is current on the current thread. If no
* context is current, returns null.
*
* @return the context current on this thread, or null if no context
* is current.
*/
public static GLContext getCurrent() {
return (GLContext) currentContext.get();
}
/**
* Sets the current context object on the current thread. This
* method is called by GLContext implementations during {@link
* #makeCurrent} and does not need to be called by end users.
*
*/
public static void setCurrent(GLContext cur) {
currentContext.set(cur);
}
/**
* For onscreen GLDrawables, indicates to the GLContext
* implementation that the underlying window has been created and
* can be drawn into.
*/
public abstract void setRealized();
/**
* Destroys this OpenGL context and frees its associated resources.
* <P>
* For onscreen GLDrawables, should be used to indicate to the
* GLContext implementation that the underlying window has been
* destroyed.
*/
public abstract void destroy();
/**
* Returns true if 'makeCurrent' will exhibit synchronized behavior.
*/
public abstract boolean isSynchronized();
/**
* Determines whether 'makeCurrent' will exhibit synchronized behavior.
*/
public abstract void setSynchronized(boolean isSynchronized);
// 'GL' and 'GLU' pipelines allow instrumenting the actual
// pipeline for debugging, tracing, etc.
public abstract GL getGL();
public abstract GLU getGLU();
public abstract void setGL(GL gl);
public abstract void setGLU(GLU glu);
}
|
