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
138
139
140
141
|
use std::ptr;
use std::fmt;
use std::error::Error;
use std::ffi::CString;
use libc;
use super::ffi;
use api::egl::ffi::egl::Egl;
use api::dlopen;
/// A connection to an X server.
pub struct XConnection {
pub xlib: ffi::Xlib,
pub xf86vmode: ffi::Xf86vmode,
pub xcursor: ffi::Xcursor,
pub xinput2: ffi::XInput2,
pub glx: Option<ffi::glx::Glx>,
pub egl: Option<Egl>,
pub display: *mut ffi::Display,
}
unsafe impl Send for XConnection {}
unsafe impl Sync for XConnection {}
impl XConnection {
pub fn new() -> Result<XConnection, XNotSupported> {
// opening the libraries
let xlib = try!(ffi::Xlib::open());
let xcursor = try!(ffi::Xcursor::open());
let xf86vmode = try!(ffi::Xf86vmode::open());
let xinput2 = try!(ffi::XInput2::open());
unsafe extern "C" fn x_error_callback(_: *mut ffi::Display, event: *mut ffi::XErrorEvent)
-> libc::c_int
{
println!("[glutin] x error code={} major={} minor={}!", (*event).error_code,
(*event).request_code, (*event).minor_code);
0
}
unsafe { (xlib.XInitThreads)() };
unsafe { (xlib.XSetErrorHandler)(Some(x_error_callback)) };
// TODO: use something safer than raw "dlopen"
let glx = {
let mut libglx = unsafe { dlopen::dlopen(b"libGL.so.1\0".as_ptr() as *const _, dlopen::RTLD_NOW) };
if libglx.is_null() {
libglx = unsafe { dlopen::dlopen(b"libGL.so\0".as_ptr() as *const _, dlopen::RTLD_NOW) };
}
if libglx.is_null() {
None
} else {
Some(ffi::glx::Glx::load_with(|sym| {
let sym = CString::new(sym).unwrap();
unsafe { dlopen::dlsym(libglx, sym.as_ptr()) }
}))
}
};
// TODO: use something safer than raw "dlopen"
let egl = {
let mut libegl = unsafe { dlopen::dlopen(b"libEGL.so.1\0".as_ptr() as *const _, dlopen::RTLD_NOW) };
if libegl.is_null() {
libegl = unsafe { dlopen::dlopen(b"libEGL.so\0".as_ptr() as *const _, dlopen::RTLD_NOW) };
}
if libegl.is_null() {
None
} else {
Some(Egl::load_with(|sym| {
let sym = CString::new(sym).unwrap();
unsafe { dlopen::dlsym(libegl, sym.as_ptr()) }
}))
}
};
// calling XOpenDisplay
let display = unsafe {
let display = (xlib.XOpenDisplay)(ptr::null());
if display.is_null() {
return Err(XNotSupported::XOpenDisplayFailed);
}
display
};
Ok(XConnection {
xlib: xlib,
xf86vmode: xf86vmode,
xcursor: xcursor,
xinput2: xinput2,
glx: glx,
egl: egl,
display: display,
})
}
}
impl Drop for XConnection {
fn drop(&mut self) {
unsafe { (self.xlib.XCloseDisplay)(self.display) };
}
}
/// Error returned if this system doesn't have XLib or can't create an X connection.
#[derive(Clone, Debug)]
pub enum XNotSupported {
/// Failed to load one or several shared libraries.
LibraryOpenError(ffi::OpenError),
/// Connecting to the X server with `XOpenDisplay` failed.
XOpenDisplayFailed, // TODO: add better message
}
impl From<ffi::OpenError> for XNotSupported {
fn from(err: ffi::OpenError) -> XNotSupported {
XNotSupported::LibraryOpenError(err)
}
}
impl Error for XNotSupported {
fn description(&self) -> &str {
match *self {
XNotSupported::LibraryOpenError(_) => "Failed to load one of xlib's shared libraries",
XNotSupported::XOpenDisplayFailed => "Failed to open connection to X server",
}
}
fn cause(&self) -> Option<&Error> {
match *self {
XNotSupported::LibraryOpenError(ref err) => Some(err),
_ => None
}
}
}
impl fmt::Display for XNotSupported {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.write_str(self.description())
}
}
|
