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
|
/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \mainpage Mesa GL API Module
*
* \section GLAPIIntroduction Introduction
*
* The Mesa GL API module is responsible for dispatching all the
* gl*() functions. All GL functions are dispatched by jumping through
* the current dispatch table (basically a struct full of function
* pointers.)
*
* A per-thread current dispatch table and per-thread current context
* pointer are managed by this module too.
*
* This module is intended to be non-Mesa-specific so it can be used
* with the X/DRI libGL also.
*/
#ifndef _GLAPI_H
#define _GLAPI_H
#define GL_GLEXT_PROTOTYPES
#include "GL/gl.h"
#include "GL/glext.h"
#include "glthread.h"
struct _glapi_table;
typedef void (*_glapi_proc)(void); /* generic function pointer */
#if defined(USE_MGL_NAMESPACE)
#define _glapi_set_dispatch _mglapi_set_dispatch
#define _glapi_get_dispatch _mglapi_get_dispatch
#define _glapi_set_context _mglapi_set_context
#define _glapi_get_context _mglapi_get_context
#define _glapi_Context _mglapi_Context
#define _glapi_Dispatch _mglapi_Dispatch
#endif
/*
* Number of extension functions which we can dynamically add at runtime.
*/
#define MAX_EXTENSION_FUNCS 300
/**
** Define the GET_CURRENT_CONTEXT() macro.
** \param C local variable which will hold the current context.
**/
#if defined (GLX_USE_TLS)
extern const void *_glapi_Context;
extern const struct _glapi_table *_glapi_Dispatch;
extern __thread void * _glapi_tls_Context
__attribute__((tls_model("initial-exec")));
# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_tls_Context
#else
extern void *_glapi_Context;
extern struct _glapi_table *_glapi_Dispatch;
# ifdef THREADS
# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())
# else
# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_Context
# endif
#endif /* defined (GLX_USE_TLS) */
/**
** GL API public functions
**/
extern void
_glapi_check_multithread(void);
extern void
_glapi_set_context(void *context);
extern void *
_glapi_get_context(void);
extern void
_glapi_set_dispatch(struct _glapi_table *dispatch);
extern struct _glapi_table *
_glapi_get_dispatch(void);
extern int
_glapi_begin_dispatch_override(struct _glapi_table *override);
extern void
_glapi_end_dispatch_override(int layer);
struct _glapi_table *
_glapi_get_override_dispatch(int layer);
extern GLuint
_glapi_get_dispatch_table_size(void);
extern void
_glapi_check_table(const struct _glapi_table *table);
extern int
_glapi_add_dispatch( const char * const * function_names,
const char * parameter_signature );
extern GLint
_glapi_get_proc_offset(const char *funcName);
extern _glapi_proc
_glapi_get_proc_address(const char *funcName);
extern const char *
_glapi_get_proc_name(GLuint offset);
#endif
|
