1/**
2 * \file extensions.h
3 * Extension handling.
4 *
5 * \if subset
6 * (No-op)
7 *
8 * \endif
9 */
10
11/*
12 * Mesa 3-D graphics library
13 *
14 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
15 *
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:
22 *
23 * The above copyright notice and this permission notice shall be included
24 * in all copies or substantial portions of the Software.
25 *
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.
33 */
34
35
36#ifndef _EXTENSIONS_H_
37#define _EXTENSIONS_H_
38
39#include "glheader.h"
40
41#ifdef __cplusplus
42extern "C" {
43#endif
44
45struct gl_context;
46struct gl_extensions;
47
48extern void _mesa_enable_sw_extensions(struct gl_context *ctx);
49
50extern void _mesa_one_time_init_extension_overrides(void);
51
52extern void _mesa_init_extensions(struct gl_extensions *extentions);
53
54extern GLubyte *_mesa_make_extension_string(struct gl_context *ctx);
55
56extern GLuint
57_mesa_get_extension_count(struct gl_context *ctx);
58
59extern const GLubyte *
60_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index);
61
62
63/**
64 * \brief An element of the \c extension_table.
65 */
66struct mesa_extension {
67   /** Name of extension, such as "GL_ARB_depth_clamp". */
68   const char *name;
69
70   /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
71   size_t offset;
72
73   /** Minimum version the extension requires for the given API
74    * (see gl_api defined in mtypes.h). The value is equal to:
75    * 10 * major_version + minor_version
76    */
77   uint8_t version[API_OPENGL_LAST + 1];
78
79   /** Year the extension was proposed or approved.  Used to sort the
80    * extension string chronologically. */
81   uint16_t year;
82};
83
84extern const struct mesa_extension _mesa_extension_table[];
85
86
87/* Generate enums for the functions below */
88enum {
89#define EXT(name_str, ...) MESA_EXTENSION_##name_str,
90#include "extensions_table.h"
91#undef EXT
92MESA_EXTENSION_COUNT
93};
94
95
96/** Checks if the context supports a user-facing extension */
97#define EXT(name_str, driver_cap, ...) \
98static inline bool \
99_mesa_has_##name_str(const struct gl_context *ctx) \
100{ \
101   return ctx->Extensions.driver_cap && (ctx->Extensions.Version >= \
102          _mesa_extension_table[MESA_EXTENSION_##name_str].version[ctx->API]); \
103}
104#include "extensions_table.h"
105#undef EXT
106
107extern struct gl_extensions _mesa_extension_override_enables;
108extern struct gl_extensions _mesa_extension_override_disables;
109
110#ifdef __cplusplus
111}
112#endif
113
114#endif
115