2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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27 * \mainpage Mesa GL API Module
29 * \section GLAPIIntroduction Introduction
31 * The Mesa GL API module is responsible for dispatching all the
32 * gl*() functions. All GL functions are dispatched by jumping through
33 * the current dispatch table (basically a struct full of function
36 * A per-thread current dispatch table and per-thread current context
37 * pointer are managed by this module too.
39 * This module is intended to be non-Mesa-specific so it can be used
40 * with the X/DRI libGL also.
47 #define GL_GLEXT_PROTOTYPES
56 typedef void (*_glapi_proc
)(void); /* generic function pointer */
58 typedef void (*_glapi_warning_func
)(void *ctx
, const char *str
, ...);
61 #if defined(USE_MGL_NAMESPACE)
62 #define _glapi_set_dispatch _mglapi_set_dispatch
63 #define _glapi_get_dispatch _mglapi_get_dispatch
64 #define _glapi_set_context _mglapi_set_context
65 #define _glapi_get_context _mglapi_get_context
66 #define _glapi_Context _mglapi_Context
67 #define _glapi_Dispatch _mglapi_Dispatch
72 * Number of extension functions which we can dynamically add at runtime.
74 #define MAX_EXTENSION_FUNCS 300
78 ** Define the GET_CURRENT_CONTEXT() macro.
79 ** \param C local variable which will hold the current context.
81 #if defined (GLX_USE_TLS)
83 extern const void *_glapi_Context
;
84 extern const struct _glapi_table
*_glapi_Dispatch
;
86 extern __thread
void * _glapi_tls_Context
87 __attribute__((tls_model("initial-exec")));
89 # define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_tls_Context
93 extern void *_glapi_Context
;
94 extern struct _glapi_table
*_glapi_Dispatch
;
97 # define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())
99 # define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_Context
102 #endif /* defined (GLX_USE_TLS) */
106 ** GL API public functions
110 _glapi_noop_enable_warnings(GLboolean enable
);
113 _glapi_set_warning_func(_glapi_warning_func func
);
116 _glapi_check_multithread(void);
120 _glapi_set_context(void *context
);
124 _glapi_get_context(void);
128 _glapi_set_dispatch(struct _glapi_table
*dispatch
);
131 extern struct _glapi_table
*
132 _glapi_get_dispatch(void);
136 _glapi_begin_dispatch_override(struct _glapi_table
*override
);
140 _glapi_end_dispatch_override(int layer
);
143 struct _glapi_table
*
144 _glapi_get_override_dispatch(int layer
);
148 _glapi_get_dispatch_table_size(void);
152 _glapi_check_table(const struct _glapi_table
*table
);
156 _glapi_add_dispatch( const char * const * function_names
,
157 const char * parameter_signature
);
160 _glapi_get_proc_offset(const char *funcName
);
164 _glapi_get_proc_address(const char *funcName
);
168 _glapi_get_proc_name(GLuint offset
);