2 * Mesa 3-D graphics library
5 * Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
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 OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
29 * Remap table management.
31 * Entries in the dispatch table are either static or dynamic. The
32 * dispatch table is shared by mesa core and glapi. When they are
33 * built separately, it is possible that a static entry in mesa core
34 * is dynamic, or assigned a different static offset, in glapi. The
35 * remap table is in charge of mapping a static entry in mesa core to
36 * a dynamic entry, or the corresponding static entry, in glapi.
41 #include "glapi/glapi.h"
43 #define MAX_ENTRY_POINTS 16
45 #define need_MESA_remap_table
46 #include "main/remap_helper.h"
49 /* this is global for quick access */
50 int driDispatchRemapTable
[driDispatchRemapTable_size
];
54 * Return the spec string associated with the given function index.
55 * The index is available from including remap_helper.h.
57 * \param func_index an opaque function index.
59 * \return the spec string associated with the function index, or NULL.
62 _mesa_get_function_spec(GLint func_index
)
64 if (func_index
< Elements(_mesa_function_pool
))
65 return _mesa_function_pool
+ func_index
;
72 * Map a function by its spec. The function will be added to glapi,
73 * and the dispatch offset will be returned.
75 * \param spec a '\0'-separated string array specifying a function.
76 * It begins with the parameter signature of the function,
77 * followed by the names of the entry points. An empty entry
78 * point name terminates the array.
80 * \return the offset of the (re-)mapped function in the dispatch
84 _mesa_map_function_spec(const char *spec
)
86 const char *signature
;
87 const char *names
[MAX_ENTRY_POINTS
+ 1];
94 spec
+= strlen(spec
) + 1;
96 /* spec is terminated by an empty string */
98 names
[num_names
] = spec
;
100 if (num_names
>= MAX_ENTRY_POINTS
)
102 spec
+= strlen(spec
) + 1;
107 names
[num_names
] = NULL
;
109 /* add the entry points to the dispatch table */
110 return _glapi_add_dispatch(names
, signature
);
115 * Map an array of functions. This is a convenient function for
116 * use with arrays available from including remap_helper.h.
118 * Note that the dispatch offsets of the functions are not returned.
119 * If they are needed, _mesa_map_function_spec() should be used.
121 * \param func_array an array of function remaps.
124 _mesa_map_function_array(const struct gl_function_remap
*func_array
)
131 for (i
= 0; func_array
[i
].func_index
!= -1; i
++) {
135 spec
= _mesa_get_function_spec(func_array
[i
].func_index
);
137 _mesa_problem(NULL
, "invalid function index %d",
138 func_array
[i
].func_index
);
142 offset
= _mesa_map_function_spec(spec
);
145 const char *name
= spec
+ strlen(spec
) + 1;
146 _mesa_warning(NULL
, "failed to remap %s", name
);
148 else if (func_array
[i
].dispatch_offset
>= 0 &&
149 offset
!= func_array
[i
].dispatch_offset
) {
150 const char *name
= spec
+ strlen(spec
) + 1;
151 _mesa_problem(NULL
, "%s should be mapped to %d, not %d",
152 name
, func_array
[i
].dispatch_offset
, offset
);
159 * Map the functions which are already static.
161 * When a extension function are incorporated into the ABI, the
162 * extension suffix is usually stripped. Mapping such functions
163 * makes sure the alternative names are available.
165 * Note that functions mapped by _mesa_init_remap_table() are
169 _mesa_map_static_functions(void)
171 /* Remap static functions which have alternative names and are in the ABI.
172 * This is to be on the safe side. glapi should have defined those names.
174 _mesa_map_function_array(MESA_alt_functions
);
179 * Initialize the remap table. This is called in one_time_init().
180 * The remap table needs to be initialized before calling the
181 * CALL/GET/SET macros defined in main/dispatch.h.
184 _mesa_do_init_remap_table(const char *pool
,
186 const struct gl_function_pool_remap
*remap
)
188 static GLboolean initialized
= GL_FALSE
;
193 initialized
= GL_TRUE
;
195 /* initialize the remap table */
196 for (i
= 0; i
< size
; i
++) {
201 ASSERT(i
== remap
[i
].remap_index
);
202 spec
= _mesa_function_pool
+ remap
[i
].pool_index
;
204 offset
= _mesa_map_function_spec(spec
);
205 /* store the dispatch offset in the remap table */
206 driDispatchRemapTable
[i
] = offset
;
208 const char *name
= spec
+ strlen(spec
) + 1;
209 _mesa_warning(NULL
, "failed to remap %s", name
);
216 _mesa_init_remap_table(void)
218 _mesa_do_init_remap_table(_mesa_function_pool
,
219 driDispatchRemapTable_size
,
220 MESA_remap_table_functions
);