1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "dispatch_common.h"
/**
* If we can determine the GLX version from the current context, then
* return that, otherwise return a version that will just send us on
* to dlsym() or get_proc_address().
*/
int
epoxy_conservative_glx_version(void)
{
Display *dpy = glXGetCurrentDisplay();
GLXContext ctx = glXGetCurrentContext();
int screen;
if (!dpy || !ctx)
return 14;
glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
return epoxy_glx_version(dpy, screen);
}
/**
* @brief Returns the version of GLX we are using
*
* The version is encoded as:
*
* ```
*
* version = major * 10 + minor
*
* ```
*
* So it can be easily used for version comparisons.
*
* @param dpy The X11 display
* @param screen The X11 screen
*
* @return The encoded version of GLX we are using
*
* @see epoxy_gl_version()
*/
int
epoxy_glx_version(Display *dpy, int screen)
{
int server_major, server_minor;
int client_major, client_minor;
int server, client;
const char *version_string;
int ret;
version_string = glXQueryServerString(dpy, screen, GLX_VERSION);
if (!version_string)
return 0;
ret = sscanf(version_string, "%d.%d", &server_major, &server_minor);
assert(ret == 2);
server = server_major * 10 + server_minor;
version_string = glXGetClientString(dpy, GLX_VERSION);
if (!version_string)
return 0;
ret = sscanf(version_string, "%d.%d", &client_major, &client_minor);
assert(ret == 2);
client = client_major * 10 + client_minor;
if (client < server)
return client;
else
return server;
}
/**
* If we can determine the GLX extension support from the current
* context, then return that, otherwise give the answer that will just
* send us on to get_proc_address().
*/
bool
epoxy_conservative_has_glx_extension(const char *ext)
{
Display *dpy = glXGetCurrentDisplay();
GLXContext ctx = glXGetCurrentContext();
int screen;
if (!dpy || !ctx)
return true;
glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
return epoxy_has_glx_extension(dpy, screen, ext);
}
/**
* @brief Returns true if the given GLX extension is supported in the current context.
*
* @param dpy The X11 display
* @param screen The X11 screen
* @param extension The name of the GLX extension
*
* @return `true` if the extension is available
*
* @see epoxy_has_gl_extension()
* @see epoxy_has_egl_extension()
*/
bool
epoxy_has_glx_extension(Display *dpy, int screen, const char *ext)
{
/* No, you can't just use glXGetClientString or
* glXGetServerString() here. Those each tell you about one half
* of what's needed for an extension to be supported, and
* glXQueryExtensionsString() is what gives you the intersection
* of the two.
*/
return epoxy_extension_in_string(glXQueryExtensionsString(dpy, screen), ext);
}
/**
* @brief Checks whether GLX is available.
*
* @param dpy The X11 display
*
* @return `true` if GLX is available
*
* @newin{1,4}
*/
bool
epoxy_has_glx(Display *dpy)
{
#if !PLATFORM_HAS_GLX
return false;
#else
Bool (* pf_glXQueryExtension) (Display *, int *, int *);
int error_base, event_base;
pf_glXQueryExtension = epoxy_conservative_glx_dlsym("glXQueryExtension", false);
if (pf_glXQueryExtension && pf_glXQueryExtension(dpy, &error_base, &event_base))
return true;
return false;
#endif /* !PLATFORM_HAS_GLX */
}
|
