1 /**************************************************************************
3 * Copyright 2008 VMware, Inc.
4 * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
5 * Copyright 2010-2011 LunarG, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
28 **************************************************************************/
32 * Functions for choosing and opening/loading device drivers.
40 #include "c11/threads.h"
42 #include "egldefines.h"
43 #include "egldisplay.h"
44 #include "egldriver.h"
47 static mtx_t _eglModuleMutex
= _MTX_INITIALIZER_NP
;
48 static _EGLDriver
*_eglDriver
;
53 mtx_lock(&_eglModuleMutex
);
56 _eglDriver
= _eglBuiltInDriver();
58 mtx_unlock(&_eglModuleMutex
);
64 _eglMatchAndInitialize(_EGLDisplay
*dpy
)
67 if (_eglDriver
->API
.Initialize(_eglDriver
, dpy
))
74 * Match a display to a driver. The display is initialized unless test_only is
75 * true. The matching is done by finding the first driver that can initialize
79 _eglMatchDriver(_EGLDisplay
*dpy
, EGLBoolean test_only
)
83 assert(!dpy
->Initialized
);
86 dpy
->Options
.TestOnly
= test_only
;
87 dpy
->Options
.UseFallback
= EGL_FALSE
;
89 best_drv
= _eglMatchAndInitialize(dpy
);
91 dpy
->Options
.UseFallback
= EGL_TRUE
;
92 best_drv
= _eglMatchAndInitialize(dpy
);
96 _eglLog(_EGL_DEBUG
, "the best driver is %s%s",
97 best_drv
->Name
, (test_only
) ? " (test only) " : "");
99 dpy
->Driver
= best_drv
;
100 dpy
->Initialized
= EGL_TRUE
;
107 __eglMustCastToProperFunctionPointerType
108 _eglGetDriverProc(const char *procname
)
111 return _eglDriver
->API
.GetProcAddress(_eglDriver
, procname
);
117 * Unload all drivers.
120 _eglUnloadDrivers(void)
122 /* this is called at atexit time */
123 if (_eglDriver
&& _eglDriver
->Unload
)
124 _eglDriver
->Unload(_eglDriver
);