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.
39 #include "mfeatures.h"
41 #if FEATURE_remap_table
45 #include "glapi/glapi.h"
47 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
48 #define MAX_ENTRY_POINTS 16
50 static const char *_mesa_function_pool
;
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 return _mesa_function_pool
+ func_index
;
68 * Map a function by its spec. The function will be added to glapi,
69 * and the dispatch offset will be returned.
71 * \param spec a '\0'-separated string array specifying a function.
72 * It begins with the parameter signature of the function,
73 * followed by the names of the entry points. An empty entry
74 * point name terminates the array.
76 * \return the offset of the (re-)mapped function in the dispatch
80 _mesa_map_function_spec(const char *spec
)
82 const char *signature
;
83 const char *names
[MAX_ENTRY_POINTS
+ 1];
90 spec
+= strlen(spec
) + 1;
92 /* spec is terminated by an empty string */
94 names
[num_names
] = spec
;
96 if (num_names
>= MAX_ENTRY_POINTS
)
98 spec
+= strlen(spec
) + 1;
103 names
[num_names
] = NULL
;
105 /* add the entry points to the dispatch table */
106 return _glapi_add_dispatch(names
, signature
);
111 * Map an array of functions. This is a convenient function for
112 * use with arrays available from including remap_helper.h.
114 * Note that the dispatch offsets of the functions are not returned.
115 * If they are needed, _mesa_map_function_spec() should be used.
117 * \param func_array an array of function remaps.
120 _mesa_map_function_array(const struct gl_function_remap
*func_array
)
127 for (i
= 0; func_array
[i
].func_index
!= -1; i
++) {
131 spec
= _mesa_get_function_spec(func_array
[i
].func_index
);
133 _mesa_problem(NULL
, "invalid function index %d",
134 func_array
[i
].func_index
);
138 offset
= _mesa_map_function_spec(spec
);
141 const char *name
= spec
+ strlen(spec
) + 1;
142 _mesa_warning(NULL
, "failed to remap %s", name
);
144 else if (func_array
[i
].dispatch_offset
>= 0 &&
145 offset
!= func_array
[i
].dispatch_offset
) {
146 const char *name
= spec
+ strlen(spec
) + 1;
147 _mesa_problem(NULL
, "%s should be mapped to %d, not %d",
148 name
, func_array
[i
].dispatch_offset
, offset
);
155 * Initialize the remap table. This is called in one_time_init().
156 * The remap table needs to be initialized before calling the
157 * CALL/GET/SET macros defined in main/dispatch.h.
160 _mesa_do_init_remap_table(const char *pool
,
162 const struct gl_function_pool_remap
*remap
)
164 static GLboolean initialized
= GL_FALSE
;
169 initialized
= GL_TRUE
;
170 _mesa_function_pool
= pool
;
172 /* initialize the remap table */
173 for (i
= 0; i
< size
; i
++) {
178 ASSERT(i
== remap
[i
].remap_index
);
179 spec
= _mesa_function_pool
+ remap
[i
].pool_index
;
181 offset
= _mesa_map_function_spec(spec
);
182 /* store the dispatch offset in the remap table */
183 driDispatchRemapTable
[i
] = offset
;
185 _mesa_warning(NULL
, "failed to remap index %d", i
);
190 #endif /* FEATURE_remap_table */