egl: inline _eglGetDriverProc() into eglGetProcAddress()
[mesa.git] / src / egl / main / egldriver.c
1 /**************************************************************************
2 *
3 * Copyright 2008 VMware, Inc.
4 * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
5 * Copyright 2010-2011 LunarG, Inc.
6 * All Rights Reserved.
7 *
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
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13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
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
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28 **************************************************************************/
29
30
31 /**
32 * Functions for choosing and opening/loading device drivers.
33 */
34
35
36 #include <assert.h>
37 #include <string.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include "c11/threads.h"
41
42 #include "egldefines.h"
43 #include "egldisplay.h"
44 #include "egldriver.h"
45 #include "egllog.h"
46
47 #include "util/debug.h"
48
49 extern const _EGLDriver _eglDriver;
50
51 /**
52 * Initialize the display using the driver's function.
53 * If the initialisation fails, try again using only software rendering.
54 */
55 bool
56 _eglInitializeDisplay(_EGLDisplay *disp)
57 {
58 assert(!disp->Initialized);
59
60 /* set options */
61 disp->Options.ForceSoftware =
62 env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
63 if (disp->Options.ForceSoftware)
64 _eglLog(_EGL_DEBUG, "Found 'LIBGL_ALWAYS_SOFTWARE' set, will use a CPU renderer");
65
66 if (_eglDriver.Initialize(disp)) {
67 disp->Driver = &_eglDriver;
68 disp->Initialized = EGL_TRUE;
69 return true;
70 }
71
72 if (disp->Options.ForceSoftware)
73 return false;
74
75 disp->Options.ForceSoftware = EGL_TRUE;
76 if (!_eglDriver.Initialize(disp))
77 return false;
78
79 disp->Driver = &_eglDriver;
80 disp->Initialized = EGL_TRUE;
81 return true;
82 }