12 * Mesa 3-D graphics library
14 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice shall be included
24 * in all copies or substantial portions of the Software.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
27 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
32 * OTHER DEALINGS IN THE SOFTWARE.
36 #ifndef _EXTENSIONS_H_
37 #define _EXTENSIONS_H_
48 extern void _mesa_enable_sw_extensions(struct gl_context
*ctx
);
50 extern void _mesa_one_time_init_extension_overrides(void);
52 extern void _mesa_init_extensions(struct gl_extensions
*extentions
);
54 extern GLubyte
*_mesa_make_extension_string(struct gl_context
*ctx
);
56 extern void _mesa_override_extensions(struct gl_context
*ctx
);
59 _mesa_get_extension_count(struct gl_context
*ctx
);
61 extern const GLubyte
*
62 _mesa_get_enabled_extension(struct gl_context
*ctx
, GLuint index
);
66 * \brief An element of the \c extension_table.
68 struct mesa_extension
{
69 /** Name of extension, such as "GL_ARB_depth_clamp". */
72 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
75 /** Minimum version the extension requires for the given API
76 * (see gl_api defined in mtypes.h). The value is equal to:
77 * 10 * major_version + minor_version
79 uint8_t version
[API_OPENGL_LAST
+ 1];
81 /** Year the extension was proposed or approved. Used to sort the
82 * extension string chronologically. */
86 extern const struct mesa_extension _mesa_extension_table
[];
89 /* Generate enums for the functions below */
91 #define EXT(name_str, ...) MESA_EXTENSION_##name_str,
92 #include "extensions_table.h"
98 /** Checks if the context supports a user-facing extension */
99 #define EXT(name_str, driver_cap, ...) \
101 _mesa_has_##name_str(const struct gl_context *ctx) \
103 return ctx->Extensions.driver_cap && (ctx->Extensions.Version >= \
104 _mesa_extension_table[MESA_EXTENSION_##name_str].version[ctx->API]); \
106 #include "extensions_table.h"
109 /* Sometimes the driver wants to query the extension override status before
110 * a context is created. These variables are filled with extension override
111 * information before context creation.
113 * This can be useful during extension bring-up when an extension is
114 * partially implemented, but cannot yet be advertised as supported.
116 * Use it with care and keep access read-only.
118 extern struct gl_extensions _mesa_extension_override_enables
;
119 extern struct gl_extensions _mesa_extension_override_disables
;