src/mapi/glapi/glapi.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   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:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  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
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \mainpage Mesa GL API Module
  28  *
  29  * \section GLAPIIntroduction Introduction
  30  *
  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
  34  * pointers.)
  35  *
  36  * A per-thread current dispatch table and per-thread current context
  37  * pointer are managed by this module too.
  38  *
  39  * This module is intended to be non-Mesa-specific so it can be used
  40  * with the X/DRI libGL also.
  41  */
  42
  43
  44 #ifndef _GLAPI_H
  45 #define _GLAPI_H
  46
  47
  48 /* opengl.dll does not export _glapi_* */
  49 #if defined(_WIN32)
  50 #define _GLAPI_NO_EXPORTS
  51 #endif
  52
  53 #ifdef _GLAPI_NO_EXPORTS
  54 #  define _GLAPI_EXPORT
  55 #else /* _GLAPI_NO_EXPORTS */
  56 #  ifdef _WIN32
  57 #    ifdef _GLAPI_DLL_EXPORTS
  58 #      define _GLAPI_EXPORT __declspec(dllexport)
  59 #    else
  60 #      define _GLAPI_EXPORT __declspec(dllimport)
  61 #    endif
  62 #  elif defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
  63 #    define _GLAPI_EXPORT __attribute__((visibility("default")))
  64 #  else
  65 #    define _GLAPI_EXPORT
  66 #  endif
  67 #endif /* _GLAPI_NO_EXPORTS */
  68
  69
  70 /* Is this needed?  It is incomplete anyway. */
  71 #ifdef USE_MGL_NAMESPACE
  72 #define _glapi_set_dispatch _mglapi_set_dispatch
  73 #define _glapi_get_dispatch _mglapi_get_dispatch
  74 #define _glapi_set_context _mglapi_set_context
  75 #define _glapi_get_context _mglapi_get_context
  76 #define _glapi_Dispatch _mglapi_Dispatch
  77 #define _glapi_Context _mglapi_Context
  78 #endif
  79
  80 #include "glapi/glthread.h"
  81
  82 typedef void (*_glapi_proc)(void);
  83 struct _glapi_table;
  84
  85
  86 #if defined (GLX_USE_TLS)
  87
  88 _GLAPI_EXPORT extern __thread struct _glapi_table * _glapi_tls_Dispatch
  89     __attribute__((tls_model("initial-exec")));
  90
  91 _GLAPI_EXPORT extern __thread void * _glapi_tls_Context
  92     __attribute__((tls_model("initial-exec")));
  93
  94 _GLAPI_EXPORT extern const struct _glapi_table *_glapi_Dispatch;
  95 _GLAPI_EXPORT extern const void *_glapi_Context;
  96
  97 # define GET_DISPATCH() _glapi_tls_Dispatch
  98 # define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) _glapi_tls_Context
  99
 100 #else
 101
 102 _GLAPI_EXPORT extern struct _glapi_table *_glapi_Dispatch;
 103 _GLAPI_EXPORT extern void *_glapi_Context;
 104
 105 # ifdef THREADS
 106
 107 #  define GET_DISPATCH() \
 108      (likely(_glapi_Dispatch) ? _glapi_Dispatch : _glapi_get_dispatch())
 109
 110 #  define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) \
 111      (likely(_glapi_Context) ? _glapi_Context : _glapi_get_context())
 112
 113 # else
 114
 115 #  define GET_DISPATCH() _glapi_Dispatch
 116 #  define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) _glapi_Context
 117
 118 # endif
 119
 120 #endif /* defined (GLX_USE_TLS) */
 121
 122
 123 void
 124 _glapi_destroy_multithread(void);
 125
 126
 127 _GLAPI_EXPORT void
 128 _glapi_check_multithread(void);
 129
 130
 131 _GLAPI_EXPORT void
 132 _glapi_set_context(void *context);
 133
 134
 135 _GLAPI_EXPORT void *
 136 _glapi_get_context(void);
 137
 138
 139 _GLAPI_EXPORT void
 140 _glapi_set_dispatch(struct _glapi_table *dispatch);
 141
 142
 143 _GLAPI_EXPORT struct _glapi_table *
 144 _glapi_get_dispatch(void);
 145
 146
 147 _GLAPI_EXPORT unsigned int
 148 _glapi_get_dispatch_table_size(void);
 149
 150
 151 _GLAPI_EXPORT int
 152 _glapi_add_dispatch( const char * const * function_names,
 153                      const char * parameter_signature );
 154
 155 _GLAPI_EXPORT int
 156 _glapi_get_proc_offset(const char *funcName);
 157
 158
 159 _GLAPI_EXPORT _glapi_proc
 160 _glapi_get_proc_address(const char *funcName);
 161
 162
 163 _GLAPI_EXPORT const char *
 164 _glapi_get_proc_name(unsigned int offset);
 165
 166
 167 _GLAPI_EXPORT unsigned long
 168 _glthread_GetID(void);
 169
 170
 171 /*
 172  * These stubs are kept so that the old DRI drivers still load.
 173  */
 174 _GLAPI_EXPORT void
 175 _glapi_noop_enable_warnings(unsigned char enable);
 176
 177
 178 _GLAPI_EXPORT void
 179 _glapi_set_warning_func(_glapi_proc func);
 180
 181
 182 #endif /* _GLAPI_H */