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
|
/*
* Copyright © 2011 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 <limits.h>
#include "glxclient.h"
#include "glx_error.h"
#include <xcb/glx.h>
#include <X11/Xlib-xcb.h>
#include <assert.h>
#if INT_MAX != 2147483647
#error This code requires sizeof(uint32_t) == sizeof(int).
#endif
_X_HIDDEN GLXContext
glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
GLXContext share_context, Bool direct,
const int *attrib_list)
{
xcb_connection_t *const c = XGetXCBConnection(dpy);
struct glx_config *const cfg = (struct glx_config *) config;
struct glx_context *const share = (struct glx_context *) share_context;
struct glx_context *gc = NULL;
unsigned num_attribs = 0;
struct glx_screen *psc;
xcb_generic_error_t *err;
xcb_void_cookie_t cookie;
unsigned dummy_err = 0;
int screen = -1;
if (dpy == NULL)
return NULL;
/* Count the number of attributes specified by the application. All
* attributes appear in pairs, except the terminating None.
*/
if (attrib_list != NULL) {
for (/* empty */; attrib_list[num_attribs * 2] != 0; num_attribs++)
/* empty */ ;
}
if (cfg) {
screen = cfg->screen;
} else {
int i;
for (i = 0; i < num_attribs; i++) {
if (attrib_list[i * 2] == GLX_SCREEN)
screen = attrib_list[i * 2 + 1];
}
}
/* This means that either the caller passed the wrong display pointer or
* one of the internal GLX data structures (probably the fbconfig) has an
* error. There is nothing sensible to do, so return an error.
*/
psc = GetGLXScreenConfigs(dpy, screen);
if (psc == NULL)
return NULL;
assert(screen == psc->scr);
if (!cfg && !__glXExtensionBitIsEnabled(psc, EXT_no_config_context_bit))
return NULL;
if (direct && psc->vtable->create_context_attribs) {
/* GLX drops the error returned by the driver. The expectation is that
* an error will also be returned by the server. The server's error
* will be delivered to the application.
*/
gc = psc->vtable->create_context_attribs(psc, cfg, share, num_attribs,
(const uint32_t *) attrib_list,
&dummy_err);
}
if (gc == NULL) {
#ifdef GLX_USE_APPLEGL
gc = applegl_create_context(psc, cfg, share, 0);
#else
gc = indirect_create_context_attribs(psc, cfg, share, num_attribs,
(const uint32_t *) attrib_list,
&dummy_err);
#endif
}
gc->xid = xcb_generate_id(c);
gc->share_xid = (share != NULL) ? share->xid : 0;
/* The manual pages for glXCreateContext and glXCreateNewContext say:
*
* "NULL is returned if execution fails on the client side."
*
* If the server generates an error, the application is supposed to catch
* the protocol error and handle it. Part of handling the error is freeing
* the possibly non-NULL value returned by this function.
*/
cookie =
xcb_glx_create_context_attribs_arb_checked(c,
gc->xid,
cfg ? cfg->fbconfigID : 0,
screen,
gc->share_xid,
gc->isDirect,
num_attribs,
(const uint32_t *)
attrib_list);
err = xcb_request_check(c, cookie);
if (err != NULL) {
gc->vtable->destroy(gc);
gc = NULL;
__glXSendErrorForXcb(dpy, err);
free(err);
}
return (GLXContext) gc;
}
|
