Load the EGL library in platform/windows

src/platform/windows/mod.rs

@@ -1,6 +1,8 @@
 #![cfg(target_os = "windows")]
 
-pub use api::win32::*;
+pub use api::win32;
+pub use api::win32::{MonitorID, get_available_monitors, get_primary_monitor};
+pub use api::win32::{WindowProxy, PollEventsIterator, WaitEventsIterator};
 
 use libc;
 
@@ -11,13 +13,74 @@ use CreationError;
 use PixelFormat;
 use GlContext;
 
+use api::egl::ffi::egl::Egl;
+
+use std::ffi::CString;
+use std::ops::{Deref, DerefMut};
+use kernel32;
+
+/// Stupid wrapper because `*const libc::c_void` doesn't implement `Sync`.
+struct EglWrapper(Egl);
+unsafe impl Sync for EglWrapper {}
+
+lazy_static! {
+    // An EGL implementation available on the system.
+    static ref EGL: Option<EglWrapper> = {
+        // the ATI drivers provide an EGL implementation in their DLLs
+        let dll_name = if cfg!(target_pointer_width = "64") {
+            b"atio6axx.dll\0"
+        } else {
+            b"atioglxx.dll\0"
+        };
+
+        let dll = unsafe { kernel32::LoadLibraryA(dll_name.as_ptr() as *const _) };
+
+        if !dll.is_null() {
+            let egl = Egl::load_with(|name| {
+                let name = CString::new(name).unwrap();
+                unsafe { kernel32::GetProcAddress(dll, name.as_ptr()) as *const _ }
+            });
+
+            Some(EglWrapper(egl))
+
+        } else {
+            None
+        }
+    };
+}
+
+
+/// The Win32 implementation of the main `Window` object.
+pub struct Window(win32::Window);
+
+impl Window {
+    /// See the docs in the crate root file.
+    pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> {
+        win32::Window::new(builder, EGL.as_ref().map(|w| &w.0)).map(|w| Window(w))
+    }
+}
+
+impl Deref for Window {
+    type Target = win32::Window;
+
+    fn deref(&self) -> &win32::Window {
+        &self.0
+    }
+}
+
+impl DerefMut for Window {
+    fn deref_mut(&mut self) -> &mut win32::Window {
+        &mut self.0
+    }
+}
+
 ///
-pub struct HeadlessContext(Window);
+pub struct HeadlessContext(win32::Window);
 
 impl HeadlessContext {
     pub fn new(mut builder: BuilderAttribs) -> Result<HeadlessContext, CreationError> {
         builder.visible = false;
-        Window::new(builder).map(|w| HeadlessContext(w))
+        win32::Window::new(builder, EGL.as_ref().map(|w| &w.0)).map(|w| HeadlessContext(w))
     }
 }