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
|
/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
* Copyright 2010-2011 LunarG, Inc.
* All Rights Reserved.
*
* 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, sub license, 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.
*
**************************************************************************/
/**
* Functions for choosing and opening/loading device drivers.
*/
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "c11/threads.h"
#include "egldefines.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "egllog.h"
#include "util/debug.h"
static mtx_t _eglModuleMutex = _MTX_INITIALIZER_NP;
static _EGLDriver *_eglDriver;
static _EGLDriver *
_eglGetDriver(void)
{
mtx_lock(&_eglModuleMutex);
if (!_eglDriver) {
_eglDriver = calloc(1, sizeof(*_eglDriver));
if (!_eglDriver)
return NULL;
_eglInitDriverFallbacks(_eglDriver);
_eglInitDriver(_eglDriver);
}
mtx_unlock(&_eglModuleMutex);
return _eglDriver;
}
static _EGLDriver *
_eglMatchAndInitialize(_EGLDisplay *dpy)
{
if (_eglGetDriver())
if (_eglDriver->API.Initialize(_eglDriver, dpy))
return _eglDriver;
return NULL;
}
/**
* Match a display to a driver. The matching is done by finding the first
* driver that can initialize the display.
*/
_EGLDriver *
_eglMatchDriver(_EGLDisplay *dpy)
{
_EGLDriver *best_drv;
assert(!dpy->Initialized);
/* set options */
dpy->Options.ForceSoftware =
env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
best_drv = _eglMatchAndInitialize(dpy);
if (!best_drv && !dpy->Options.ForceSoftware) {
dpy->Options.ForceSoftware = EGL_TRUE;
best_drv = _eglMatchAndInitialize(dpy);
}
if (best_drv) {
dpy->Driver = best_drv;
dpy->Initialized = EGL_TRUE;
}
return best_drv;
}
__eglMustCastToProperFunctionPointerType
_eglGetDriverProc(const char *procname)
{
if (_eglGetDriver())
return _eglDriver->API.GetProcAddress(_eglDriver, procname);
return NULL;
}
/**
* Unload all drivers.
*/
void
_eglUnloadDrivers(void)
{
/* this is called at atexit time */
free(_eglDriver);
_eglDriver = NULL;
}
|
