2 * Mesa 3-D graphics library
4 * Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
28 * Remap table management.
30 * Entries in the dispatch table are either static or dynamic. The
31 * dispatch table is shared by mesa core and glapi. When they are
32 * built separately, it is possible that a static entry in mesa core
33 * is dynamic, or assigned a different static offset, in glapi. The
34 * remap table is in charge of mapping a static entry in mesa core to
35 * a dynamic entry, or the corresponding static entry, in glapi.
40 #include "glapi/glapi.h"
42 #define MAX_ENTRY_POINTS 16
44 #define need_MESA_remap_table
45 #include "main/remap_helper.h"
48 /* this is global for quick access */
49 int driDispatchRemapTable
[driDispatchRemapTable_size
];
53 * Return the spec string associated with the given function index.
54 * The index is available from including remap_helper.h.
56 * \param func_index an opaque function index.
58 * \return the spec string associated with the function index, or NULL.
61 _mesa_get_function_spec(GLint func_index
)
63 if (func_index
< ARRAY_SIZE(_mesa_function_pool
))
64 return _mesa_function_pool
+ func_index
;
71 * Map a function by its spec. The function will be added to glapi,
72 * and the dispatch offset will be returned.
74 * \param spec a '\0'-separated string array specifying a function.
75 * It begins with the parameter signature of the function,
76 * followed by the names of the entry points. An empty entry
77 * point name terminates the array.
79 * \return the offset of the (re-)mapped function in the dispatch
83 _mesa_map_function_spec(const char *spec
)
85 const char *signature
;
86 const char *names
[MAX_ENTRY_POINTS
+ 1];
93 spec
+= strlen(spec
) + 1;
95 /* spec is terminated by an empty string */
97 names
[num_names
] = spec
;
99 if (num_names
>= MAX_ENTRY_POINTS
)
101 spec
+= strlen(spec
) + 1;
106 names
[num_names
] = NULL
;
108 /* add the entry points to the dispatch table */
109 return _glapi_add_dispatch(names
, signature
);
114 * Map an array of functions. This is a convenient function for
115 * use with arrays available from including remap_helper.h.
117 * Note that the dispatch offsets of the functions are not returned.
118 * If they are needed, _mesa_map_function_spec() should be used.
120 * \param func_array an array of function remaps.
123 _mesa_map_function_array(const struct gl_function_remap
*func_array
)
130 for (i
= 0; func_array
[i
].func_index
!= -1; i
++) {
134 spec
= _mesa_get_function_spec(func_array
[i
].func_index
);
136 _mesa_problem(NULL
, "invalid function index %d",
137 func_array
[i
].func_index
);
141 offset
= _mesa_map_function_spec(spec
);
144 const char *name
= spec
+ strlen(spec
) + 1;
145 _mesa_warning(NULL
, "failed to remap %s", name
);
147 else if (func_array
[i
].dispatch_offset
>= 0 &&
148 offset
!= func_array
[i
].dispatch_offset
) {
149 const char *name
= spec
+ strlen(spec
) + 1;
150 _mesa_problem(NULL
, "%s should be mapped to %d, not %d",
151 name
, func_array
[i
].dispatch_offset
, offset
);
158 * Map the functions which are already static.
160 * When a extension function are incorporated into the ABI, the
161 * extension suffix is usually stripped. Mapping such functions
162 * makes sure the alternative names are available.
164 * Note that functions mapped by _mesa_init_remap_table() are
168 _mesa_map_static_functions(void)
170 /* Remap static functions which have alternative names and are in the ABI.
171 * This is to be on the safe side. glapi should have defined those names.
173 _mesa_map_function_array(MESA_alt_functions
);
178 * Initialize the remap table. This is called in one_time_init().
179 * The remap table needs to be initialized before calling the
180 * CALL/GET/SET macros defined in main/dispatch.h.
183 _mesa_do_init_remap_table(const char *pool
,
185 const struct gl_function_pool_remap
*remap
)
187 static GLboolean initialized
= GL_FALSE
;
192 initialized
= GL_TRUE
;
194 /* initialize the remap table */
195 for (i
= 0; i
< size
; i
++) {
200 assert(i
== remap
[i
].remap_index
);
201 spec
= _mesa_function_pool
+ remap
[i
].pool_index
;
203 offset
= _mesa_map_function_spec(spec
);
204 /* store the dispatch offset in the remap table */
205 driDispatchRemapTable
[i
] = offset
;
207 const char *name
= spec
+ strlen(spec
) + 1;
208 _mesa_warning(NULL
, "failed to remap %s", name
);
215 _mesa_init_remap_table(void)
217 _mesa_do_init_remap_table(_mesa_function_pool
,
218 driDispatchRemapTable_size
,
219 MESA_remap_table_functions
);