blob: 351a12849c8d75c8b360ae04bcbfe9eac3c4674e (
plain)
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
|
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Err.hpp>
#include <SFML/System/Mutex.hpp>
#include <SFML/System/Lock.hpp>
#include <SFML/Window/Unix/Display.hpp>
#include <X11/keysym.h>
#include <cassert>
#include <cstdlib>
#include <map>
namespace
{
// The shared display and its reference counter
Display* sharedDisplay = NULL;
unsigned int referenceCount = 0;
sf::Mutex mutex;
typedef std::map<std::string, Atom> AtomMap;
AtomMap atoms;
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
Display* OpenDisplay()
{
Lock lock(mutex);
if (referenceCount == 0)
{
sharedDisplay = XOpenDisplay(NULL);
// Opening display failed: The best we can do at the moment is to output a meaningful error message
// and cause an abnormal program termination
if (!sharedDisplay)
{
err() << "Failed to open X11 display; make sure the DISPLAY environment variable is set correctly" << std::endl;
std::abort();
}
}
referenceCount++;
return sharedDisplay;
}
////////////////////////////////////////////////////////////
void CloseDisplay(Display* display)
{
Lock lock(mutex);
assert(display == sharedDisplay);
referenceCount--;
if (referenceCount == 0)
XCloseDisplay(display);
}
////////////////////////////////////////////////////////////
Atom getAtom(const std::string& name, bool onlyIfExists)
{
AtomMap::const_iterator iter = atoms.find(name);
if (iter != atoms.end())
return iter->second;
Display* display = OpenDisplay();
Atom atom = XInternAtom(display, name.c_str(), onlyIfExists ? True : False);
CloseDisplay(display);
atoms[name] = atom;
return atom;
}
} // namespace priv
} // namespace sf
|
