src/mesa/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 #define GL_GLEXT_PROTOTYPES
  48
  49 #include "GL/gl.h"
  50 #include "GL/glext.h"
  51 #include "glthread.h"
  52
  53
  54 struct _glapi_table;
  55
  56 typedef void (*_glapi_proc)(void); /* generic function pointer */
  57
  58 typedef void (*_glapi_warning_func)(void *ctx, const char *str, ...);
  59
  60
  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
  68 #endif
  69
  70
  71 /*
  72  * Number of extension functions which we can dynamically add at runtime.
  73  */
  74 #define MAX_EXTENSION_FUNCS 300
  75
  76
  77 /**
  78  ** Define the GET_CURRENT_CONTEXT() macro.
  79  ** \param C local variable which will hold the current context.
  80  **/
  81 #if defined (GLX_USE_TLS)
  82
  83 extern const void *_glapi_Context;
  84 extern const struct _glapi_table *_glapi_Dispatch;
  85
  86 extern __thread void * _glapi_tls_Context
  87     __attribute__((tls_model("initial-exec")));
  88
  89 # define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) _glapi_tls_Context
  90
  91 #else
  92
  93 extern void *_glapi_Context;
  94 extern struct _glapi_table *_glapi_Dispatch;
  95
  96 # ifdef THREADS
  97 #  define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())
  98 # else
  99 #  define GET_CURRENT_CONTEXT(C)  GLcontext *C = (GLcontext *) _glapi_Context
 100 # endif
 101
 102 #endif /* defined (GLX_USE_TLS) */
 103
 104
 105 /**
 106  ** GL API public functions
 107  **/
 108
 109 extern void
 110 _glapi_noop_enable_warnings(GLboolean enable);
 111
 112 extern void
 113 _glapi_set_warning_func(_glapi_warning_func func);
 114
 115 extern void
 116 _glapi_check_multithread(void);
 117
 118
 119 extern void
 120 _glapi_set_context(void *context);
 121
 122
 123 extern void *
 124 _glapi_get_context(void);
 125
 126
 127 extern void
 128 _glapi_set_dispatch(struct _glapi_table *dispatch);
 129
 130
 131 extern struct _glapi_table *
 132 _glapi_get_dispatch(void);
 133
 134
 135 extern int
 136 _glapi_begin_dispatch_override(struct _glapi_table *override);
 137
 138
 139 extern void
 140 _glapi_end_dispatch_override(int layer);
 141
 142
 143 struct _glapi_table *
 144 _glapi_get_override_dispatch(int layer);
 145
 146
 147 extern GLuint
 148 _glapi_get_dispatch_table_size(void);
 149
 150
 151 extern void
 152 _glapi_check_table(const struct _glapi_table *table);
 153
 154
 155 extern int
 156 _glapi_add_dispatch( const char * const * function_names,
 157                      const char * parameter_signature );
 158
 159 extern GLint
 160 _glapi_get_proc_offset(const char *funcName);
 161
 162
 163 extern _glapi_proc
 164 _glapi_get_proc_address(const char *funcName);
 165
 166
 167 extern const char *
 168 _glapi_get_proc_name(GLuint offset);
 169
 170
 171 #endif