1//! Bindings to the EGL library `libwayland-egl.so`
2//!
3//! This lib allows to create EGL surfaces out of wayland surfaces.
4//!
5//! The created handle is named `wayland_egl_handle()`.
6
7use crate::client::wl_proxy;
8#[cfg(feature = "dlopen")]
9use once_cell::sync::Lazy;
10use std::os::raw::c_int;
11
12pub enum wl_egl_window {}
13
14external_library!(WaylandEgl, "wayland-egl",
15 functions:
16 fn wl_egl_window_create(*mut wl_proxy, c_int, c_int) -> *mut wl_egl_window,
17 fn wl_egl_window_destroy(*mut wl_egl_window) -> (),
18 fn wl_egl_window_resize(*mut wl_egl_window, c_int, c_int, c_int, c_int) -> (),
19 fn wl_egl_window_get_attached_size(*mut wl_egl_window, *mut c_int, *mut c_int) -> (),
20);
21
22#[cfg(feature = "dlopen")]
23pub fn wayland_egl_option() -> Option<&'static WaylandEgl> {
24 static WAYLAND_EGL_OPTION: Lazy<Option<WaylandEgl>> = Lazy::new(|| {
25 let versions: [&'static str; 2] = ["libwayland-egl.so.1", "libwayland-egl.so"];
26
27 for ver: &&str in &versions {
28 match unsafe { WaylandEgl::open(name:ver) } {
29 Ok(h: WaylandEgl) => return Some(h),
30 Err(::dlib::DlError::CantOpen(_)) => continue,
31 Err(::dlib::DlError::MissingSymbol(s: &'static str)) => {
32 log::error!("Found library {} cannot be used: symbol {} is missing.", ver, s);
33 return None;
34 }
35 }
36 }
37 None
38 });
39
40 WAYLAND_EGL_OPTION.as_ref()
41}
42
43#[cfg(feature = "dlopen")]
44pub fn wayland_egl_handle() -> &'static WaylandEgl {
45 static WAYLAND_EGL_HANDLE: Lazy<&'static WaylandEgl> =
46 Lazy::new(|| wayland_egl_option().expect(msg:"Library libwayland-egl.so could not be loaded."));
47
48 &WAYLAND_EGL_HANDLE
49}
50
51#[cfg(not(feature = "dlopen"))]
52pub fn is_lib_available() -> bool {
53 true
54}
55#[cfg(feature = "dlopen")]
56pub fn is_lib_available() -> bool {
57 wayland_egl_option().is_some()
58}
59