Create reorganization

src/api/win32/callback.rs

@@ -0,0 +1,253 @@
+use std::mem;
+use std::ptr;
+use std::cell::RefCell;
+use std::sync::mpsc::Sender;
+use std::sync::{Arc, Mutex};
+
+use CursorState;
+use Event;
+use super::event;
+
+use user32;
+use winapi;
+
+/// There's no parameters passed to the callback function, so it needs to get
+/// its context (the HWND, the Sender for events, etc.) stashed in
+/// a thread-local variable.
+thread_local!(pub static CONTEXT_STASH: RefCell<Option<ThreadLocalData>> = RefCell::new(None));
+
+pub struct ThreadLocalData {
+    pub win: winapi::HWND,
+    pub sender: Sender<Event>,
+    pub cursor_state: Arc<Mutex<CursorState>>
+}
+
+/// Checks that the window is the good one, and if so send the event to it.
+fn send_event(input_window: winapi::HWND, event: Event) {
+    CONTEXT_STASH.with(|context_stash| {
+        let context_stash = context_stash.borrow();
+        let stored = match *context_stash {
+            None => return,
+            Some(ref v) => v
+        };
+
+        let &ThreadLocalData { ref win, ref sender, .. } = stored;
+
+        if win != &input_window {
+            return;
+        }
+
+        sender.send(event).ok();  // ignoring if closed
+    });
+}
+
+/// This is the callback that is called by `DispatchMessage` in the events loop.
+/// 
+/// Returning 0 tells the Win32 API that the message has been processed.
+pub unsafe extern "system" fn callback(window: winapi::HWND, msg: winapi::UINT,
+                                       wparam: winapi::WPARAM, lparam: winapi::LPARAM)
+                                       -> winapi::LRESULT
+{
+    match msg {
+        winapi::WM_DESTROY => {
+            use events::Event::Closed;
+
+            CONTEXT_STASH.with(|context_stash| {
+                let context_stash = context_stash.borrow();
+                let stored = match *context_stash {
+                    None => return,
+                    Some(ref v) => v
+                };
+
+                let &ThreadLocalData { ref win, .. } = stored;
+
+                if win == &window {
+                    user32::PostQuitMessage(0);
+                }
+            });
+
+            send_event(window, Closed);
+            0
+        },
+
+        winapi::WM_ERASEBKGND => {
+            1
+        },
+
+        winapi::WM_SIZE => {
+            use events::Event::Resized;
+            let w = winapi::LOWORD(lparam as winapi::DWORD) as u32;
+            let h = winapi::HIWORD(lparam as winapi::DWORD) as u32;
+            send_event(window, Resized(w, h));
+            0
+        },
+
+        winapi::WM_MOVE => {
+            use events::Event::Moved;
+            let x = winapi::LOWORD(lparam as winapi::DWORD) as i32;
+            let y = winapi::HIWORD(lparam as winapi::DWORD) as i32;
+            send_event(window, Moved(x, y));
+            0
+        },
+
+        winapi::WM_CHAR => {
+            use std::mem;
+            use events::Event::ReceivedCharacter;
+            let chr: char = mem::transmute(wparam as u32);
+            send_event(window, ReceivedCharacter(chr));
+            0
+        },
+
+        winapi::WM_MOUSEMOVE => {
+            use events::Event::MouseMoved;
+
+            let x = winapi::GET_X_LPARAM(lparam) as i32;
+            let y = winapi::GET_Y_LPARAM(lparam) as i32;
+
+            send_event(window, MouseMoved((x, y)));
+
+            0
+        },
+
+        winapi::WM_MOUSEWHEEL => {
+            use events::Event::MouseWheel;
+
+            let value = (wparam >> 16) as i16;
+            let value = value as i32;
+
+            send_event(window, MouseWheel(value));
+
+            0
+        },
+
+        winapi::WM_KEYDOWN => {
+            use events::Event::KeyboardInput;
+            use events::ElementState::Pressed;
+            let scancode = ((lparam >> 16) & 0xff) as u8;
+            let vkey = event::vkeycode_to_element(wparam);
+            send_event(window, KeyboardInput(Pressed, scancode, vkey));
+            0
+        },
+
+        winapi::WM_KEYUP => {
+            use events::Event::KeyboardInput;
+            use events::ElementState::Released;
+            let scancode = ((lparam >> 16) & 0xff) as u8;
+            let vkey = event::vkeycode_to_element(wparam);
+            send_event(window, KeyboardInput(Released, scancode, vkey));
+            0
+        },
+
+        winapi::WM_LBUTTONDOWN => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Left;
+            use events::ElementState::Pressed;
+            send_event(window, MouseInput(Pressed, Left));
+            0
+        },
+
+        winapi::WM_LBUTTONUP => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Left;
+            use events::ElementState::Released;
+            send_event(window, MouseInput(Released, Left));
+            0
+        },
+
+        winapi::WM_RBUTTONDOWN => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Right;
+            use events::ElementState::Pressed;
+            send_event(window, MouseInput(Pressed, Right));
+            0
+        },
+
+        winapi::WM_RBUTTONUP => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Right;
+            use events::ElementState::Released;
+            send_event(window, MouseInput(Released, Right));
+            0
+        },
+
+        winapi::WM_MBUTTONDOWN => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Middle;
+            use events::ElementState::Pressed;
+            send_event(window, MouseInput(Pressed, Middle));
+            0
+        },
+
+        winapi::WM_MBUTTONUP => {
+            use events::Event::MouseInput;
+            use events::MouseButton::Middle;
+            use events::ElementState::Released;
+            send_event(window, MouseInput(Released, Middle));
+            0
+        },
+
+        winapi::WM_INPUT => {
+            let mut data: winapi::RAWINPUT = mem::uninitialized();
+            let mut data_size = mem::size_of::<winapi::RAWINPUT>() as winapi::UINT;
+            user32::GetRawInputData(mem::transmute(lparam), winapi::RID_INPUT,
+                                    mem::transmute(&mut data), &mut data_size,
+                                    mem::size_of::<winapi::RAWINPUTHEADER>() as winapi::UINT);
+
+            if data.header.dwType == winapi::RIM_TYPEMOUSE {
+                let _x = data.mouse.lLastX;  // FIXME: this is not always the relative movement
+                let _y = data.mouse.lLastY;
+                // TODO: 
+                //send_event(window, Event::MouseRawMovement { x: x, y: y });
+
+                0
+
+            } else {
+                user32::DefWindowProcW(window, msg, wparam, lparam)
+            }
+        },
+
+        winapi::WM_SETFOCUS => {
+            use events::Event::Focused;
+            send_event(window, Focused(true));
+            0
+        },
+
+        winapi::WM_KILLFOCUS => {
+            use events::Event::Focused;
+            send_event(window, Focused(false));
+            0
+        },
+
+        winapi::WM_SETCURSOR => {
+            CONTEXT_STASH.with(|context_stash| {
+                let cstash = context_stash.borrow();
+                let cstash = cstash.as_ref();
+                // there's a very bizarre borrow checker bug
+                // possibly related to rust-lang/rust/#23338
+                let cursor_state = if let Some(cstash) = cstash { 
+                    if let Ok(cursor_state) = cstash.cursor_state.lock() {
+                        match *cursor_state {
+                            CursorState::Normal => {
+                                user32::SetCursor(user32::LoadCursorW(
+                                        ptr::null_mut(),
+                                        winapi::IDC_ARROW));
+                            },
+                            CursorState::Grab | CursorState::Hide => {
+                                user32::SetCursor(ptr::null_mut());
+                            }
+                        }
+                    }
+                } else {
+                    return
+                };
+
+//                let &ThreadLocalData { ref cursor_state, .. } = stored;
+            });
+            0
+        },
+
+        _ => {
+            user32::DefWindowProcW(window, msg, wparam, lparam)
+        }
+    }
+}

src/api/win32/event.rs

@@ -0,0 +1,181 @@
+use events::VirtualKeyCode;
+use winapi;
+
+pub fn vkeycode_to_element(code: winapi::WPARAM) -> Option<VirtualKeyCode> {
+    match code {
+        //winapi::VK_LBUTTON => Some(VirtualKeyCode::Lbutton),
+        //winapi::VK_RBUTTON => Some(VirtualKeyCode::Rbutton),
+        //winapi::VK_CANCEL => Some(VirtualKeyCode::Cancel),
+        //winapi::VK_MBUTTON => Some(VirtualKeyCode::Mbutton),
+        //winapi::VK_XBUTTON1 => Some(VirtualKeyCode::Xbutton1),
+        //winapi::VK_XBUTTON2 => Some(VirtualKeyCode::Xbutton2),
+        winapi::VK_BACK => Some(VirtualKeyCode::Back),
+        winapi::VK_TAB => Some(VirtualKeyCode::Tab),
+        //winapi::VK_CLEAR => Some(VirtualKeyCode::Clear),
+        winapi::VK_RETURN => Some(VirtualKeyCode::Return),
+        //winapi::VK_SHIFT => Some(VirtualKeyCode::Shift),
+        //winapi::VK_CONTROL => Some(VirtualKeyCode::Control),
+        //winapi::VK_MENU => Some(VirtualKeyCode::Menu),
+        winapi::VK_PAUSE => Some(VirtualKeyCode::Pause),
+        winapi::VK_CAPITAL => Some(VirtualKeyCode::Capital),
+        winapi::VK_KANA => Some(VirtualKeyCode::Kana),
+        //winapi::VK_HANGUEL => Some(VirtualKeyCode::Hanguel),
+        //winapi::VK_HANGUL => Some(VirtualKeyCode::Hangul),
+        //winapi::VK_JUNJA => Some(VirtualKeyCode::Junja),
+        //winapi::VK_FINAL => Some(VirtualKeyCode::Final),
+        //winapi::VK_HANJA => Some(VirtualKeyCode::Hanja),
+        winapi::VK_KANJI => Some(VirtualKeyCode::Kanji),
+        winapi::VK_ESCAPE => Some(VirtualKeyCode::Escape),
+        winapi::VK_CONVERT => Some(VirtualKeyCode::Convert),
+        //winapi::VK_NONCONVERT => Some(VirtualKeyCode::Nonconvert),
+        //winapi::VK_ACCEPT => Some(VirtualKeyCode::Accept),
+        //winapi::VK_MODECHANGE => Some(VirtualKeyCode::Modechange),
+        winapi::VK_SPACE => Some(VirtualKeyCode::Space),
+        winapi::VK_PRIOR => Some(VirtualKeyCode::PageUp),
+        winapi::VK_NEXT => Some(VirtualKeyCode::PageDown),
+        winapi::VK_END => Some(VirtualKeyCode::End),
+        winapi::VK_HOME => Some(VirtualKeyCode::Home),
+        winapi::VK_LEFT => Some(VirtualKeyCode::Left),
+        winapi::VK_UP => Some(VirtualKeyCode::Up),
+        winapi::VK_RIGHT => Some(VirtualKeyCode::Right),
+        winapi::VK_DOWN => Some(VirtualKeyCode::Down),
+        //winapi::VK_SELECT => Some(VirtualKeyCode::Select),
+        //winapi::VK_PRINT => Some(VirtualKeyCode::Print),
+        //winapi::VK_EXECUTE => Some(VirtualKeyCode::Execute),
+        winapi::VK_SNAPSHOT => Some(VirtualKeyCode::Snapshot),
+        winapi::VK_INSERT => Some(VirtualKeyCode::Insert),
+        winapi::VK_DELETE => Some(VirtualKeyCode::Delete),
+        //winapi::VK_HELP => Some(VirtualKeyCode::Help),
+        0x30 => Some(VirtualKeyCode::Key0),
+        0x31 => Some(VirtualKeyCode::Key1),
+        0x32 => Some(VirtualKeyCode::Key2),
+        0x33 => Some(VirtualKeyCode::Key3),
+        0x34 => Some(VirtualKeyCode::Key4),
+        0x35 => Some(VirtualKeyCode::Key5),
+        0x36 => Some(VirtualKeyCode::Key6),
+        0x37 => Some(VirtualKeyCode::Key7),
+        0x38 => Some(VirtualKeyCode::Key8),
+        0x39 => Some(VirtualKeyCode::Key9),
+        0x41 => Some(VirtualKeyCode::A),
+        0x42 => Some(VirtualKeyCode::B),
+        0x43 => Some(VirtualKeyCode::C),
+        0x44 => Some(VirtualKeyCode::D),
+        0x45 => Some(VirtualKeyCode::E),
+        0x46 => Some(VirtualKeyCode::F),
+        0x47 => Some(VirtualKeyCode::G),
+        0x48 => Some(VirtualKeyCode::H),
+        0x49 => Some(VirtualKeyCode::I),
+        0x4A => Some(VirtualKeyCode::J),
+        0x4B => Some(VirtualKeyCode::K),
+        0x4C => Some(VirtualKeyCode::L),
+        0x4D => Some(VirtualKeyCode::M),
+        0x4E => Some(VirtualKeyCode::N),
+        0x4F => Some(VirtualKeyCode::O),
+        0x50 => Some(VirtualKeyCode::P),
+        0x51 => Some(VirtualKeyCode::Q),
+        0x52 => Some(VirtualKeyCode::R),
+        0x53 => Some(VirtualKeyCode::S),
+        0x54 => Some(VirtualKeyCode::T),
+        0x55 => Some(VirtualKeyCode::U),
+        0x56 => Some(VirtualKeyCode::V),
+        0x57 => Some(VirtualKeyCode::W),
+        0x58 => Some(VirtualKeyCode::X),
+        0x59 => Some(VirtualKeyCode::Y),
+        0x5A => Some(VirtualKeyCode::Z),
+        //winapi::VK_LWIN => Some(VirtualKeyCode::Lwin),
+        //winapi::VK_RWIN => Some(VirtualKeyCode::Rwin),
+        winapi::VK_APPS => Some(VirtualKeyCode::Apps),
+        winapi::VK_SLEEP => Some(VirtualKeyCode::Sleep),
+        winapi::VK_NUMPAD0 => Some(VirtualKeyCode::Numpad0),
+        winapi::VK_NUMPAD1 => Some(VirtualKeyCode::Numpad1),
+        winapi::VK_NUMPAD2 => Some(VirtualKeyCode::Numpad2),
+        winapi::VK_NUMPAD3 => Some(VirtualKeyCode::Numpad3),
+        winapi::VK_NUMPAD4 => Some(VirtualKeyCode::Numpad4),
+        winapi::VK_NUMPAD5 => Some(VirtualKeyCode::Numpad5),
+        winapi::VK_NUMPAD6 => Some(VirtualKeyCode::Numpad6),
+        winapi::VK_NUMPAD7 => Some(VirtualKeyCode::Numpad7),
+        winapi::VK_NUMPAD8 => Some(VirtualKeyCode::Numpad8),
+        winapi::VK_NUMPAD9 => Some(VirtualKeyCode::Numpad9),
+        winapi::VK_MULTIPLY => Some(VirtualKeyCode::Multiply),
+        winapi::VK_ADD => Some(VirtualKeyCode::Add),
+        //winapi::VK_SEPARATOR => Some(VirtualKeyCode::Separator),
+        winapi::VK_SUBTRACT => Some(VirtualKeyCode::Subtract),
+        winapi::VK_DECIMAL => Some(VirtualKeyCode::Decimal),
+        winapi::VK_DIVIDE => Some(VirtualKeyCode::Divide),
+        winapi::VK_F1 => Some(VirtualKeyCode::F1),
+        winapi::VK_F2 => Some(VirtualKeyCode::F2),
+        winapi::VK_F3 => Some(VirtualKeyCode::F3),
+        winapi::VK_F4 => Some(VirtualKeyCode::F4),
+        winapi::VK_F5 => Some(VirtualKeyCode::F5),
+        winapi::VK_F6 => Some(VirtualKeyCode::F6),
+        winapi::VK_F7 => Some(VirtualKeyCode::F7),
+        winapi::VK_F8 => Some(VirtualKeyCode::F8),
+        winapi::VK_F9 => Some(VirtualKeyCode::F9),
+        winapi::VK_F10 => Some(VirtualKeyCode::F10),
+        winapi::VK_F11 => Some(VirtualKeyCode::F11),
+        winapi::VK_F12 => Some(VirtualKeyCode::F12),
+        winapi::VK_F13 => Some(VirtualKeyCode::F13),
+        winapi::VK_F14 => Some(VirtualKeyCode::F14),
+        winapi::VK_F15 => Some(VirtualKeyCode::F15),
+        /*winapi::VK_F16 => Some(VirtualKeyCode::F16),
+        winapi::VK_F17 => Some(VirtualKeyCode::F17),
+        winapi::VK_F18 => Some(VirtualKeyCode::F18),
+        winapi::VK_F19 => Some(VirtualKeyCode::F19),
+        winapi::VK_F20 => Some(VirtualKeyCode::F20),
+        winapi::VK_F21 => Some(VirtualKeyCode::F21),
+        winapi::VK_F22 => Some(VirtualKeyCode::F22),
+        winapi::VK_F23 => Some(VirtualKeyCode::F23),
+        winapi::VK_F24 => Some(VirtualKeyCode::F24),*/
+        winapi::VK_NUMLOCK => Some(VirtualKeyCode::Numlock),
+        winapi::VK_SCROLL => Some(VirtualKeyCode::Scroll),
+        /*winapi::VK_LSHIFT => Some(VirtualKeyCode::Lshift),
+        winapi::VK_RSHIFT => Some(VirtualKeyCode::Rshift),
+        winapi::VK_LCONTROL => Some(VirtualKeyCode::Lcontrol),
+        winapi::VK_RCONTROL => Some(VirtualKeyCode::Rcontrol),
+        winapi::VK_LMENU => Some(VirtualKeyCode::Lmenu),
+        winapi::VK_RMENU => Some(VirtualKeyCode::Rmenu),
+        winapi::VK_BROWSER_BACK => Some(VirtualKeyCode::Browser_back),
+        winapi::VK_BROWSER_FORWARD => Some(VirtualKeyCode::Browser_forward),
+        winapi::VK_BROWSER_REFRESH => Some(VirtualKeyCode::Browser_refresh),
+        winapi::VK_BROWSER_STOP => Some(VirtualKeyCode::Browser_stop),
+        winapi::VK_BROWSER_SEARCH => Some(VirtualKeyCode::Browser_search),
+        winapi::VK_BROWSER_FAVORITES => Some(VirtualKeyCode::Browser_favorites),
+        winapi::VK_BROWSER_HOME => Some(VirtualKeyCode::Browser_home),
+        winapi::VK_VOLUME_MUTE => Some(VirtualKeyCode::Volume_mute),
+        winapi::VK_VOLUME_DOWN => Some(VirtualKeyCode::Volume_down),
+        winapi::VK_VOLUME_UP => Some(VirtualKeyCode::Volume_up),
+        winapi::VK_MEDIA_NEXT_TRACK => Some(VirtualKeyCode::Media_next_track),
+        winapi::VK_MEDIA_PREV_TRACK => Some(VirtualKeyCode::Media_prev_track),
+        winapi::VK_MEDIA_STOP => Some(VirtualKeyCode::Media_stop),
+        winapi::VK_MEDIA_PLAY_PAUSE => Some(VirtualKeyCode::Media_play_pause),
+        winapi::VK_LAUNCH_MAIL => Some(VirtualKeyCode::Launch_mail),
+        winapi::VK_LAUNCH_MEDIA_SELECT => Some(VirtualKeyCode::Launch_media_select),
+        winapi::VK_LAUNCH_APP1 => Some(VirtualKeyCode::Launch_app1),
+        winapi::VK_LAUNCH_APP2 => Some(VirtualKeyCode::Launch_app2),
+        winapi::VK_OEM_1 => Some(VirtualKeyCode::Oem_1),
+        winapi::VK_OEM_PLUS => Some(VirtualKeyCode::Oem_plus),
+        winapi::VK_OEM_COMMA => Some(VirtualKeyCode::Oem_comma),
+        winapi::VK_OEM_MINUS => Some(VirtualKeyCode::Oem_minus),
+        winapi::VK_OEM_PERIOD => Some(VirtualKeyCode::Oem_period),
+        winapi::VK_OEM_2 => Some(VirtualKeyCode::Oem_2),
+        winapi::VK_OEM_3 => Some(VirtualKeyCode::Oem_3),
+        winapi::VK_OEM_4 => Some(VirtualKeyCode::Oem_4),
+        winapi::VK_OEM_5 => Some(VirtualKeyCode::Oem_5),
+        winapi::VK_OEM_6 => Some(VirtualKeyCode::Oem_6),
+        winapi::VK_OEM_7 => Some(VirtualKeyCode::Oem_7),
+        winapi::VK_OEM_8 => Some(VirtualKeyCode::Oem_8),
+        winapi::VK_OEM_102 => Some(VirtualKeyCode::Oem_102),
+        winapi::VK_PROCESSKEY => Some(VirtualKeyCode::Processkey),
+        winapi::VK_PACKET => Some(VirtualKeyCode::Packet),
+        winapi::VK_ATTN => Some(VirtualKeyCode::Attn),
+        winapi::VK_CRSEL => Some(VirtualKeyCode::Crsel),
+        winapi::VK_EXSEL => Some(VirtualKeyCode::Exsel),
+        winapi::VK_EREOF => Some(VirtualKeyCode::Ereof),
+        winapi::VK_PLAY => Some(VirtualKeyCode::Play),
+        winapi::VK_ZOOM => Some(VirtualKeyCode::Zoom),
+        winapi::VK_NONAME => Some(VirtualKeyCode::Noname),
+        winapi::VK_PA1 => Some(VirtualKeyCode::Pa1),
+        winapi::VK_OEM_CLEAR => Some(VirtualKeyCode::Oem_clear),*/
+        _ => None
+    }
+}

src/api/win32/gl.rs

@@ -0,0 +1,12 @@
+/// WGL bindings
+pub mod wgl {
+    include!(concat!(env!("OUT_DIR"), "/wgl_bindings.rs"));
+}
+
+/// Functions that are not necessarly always available
+pub mod wgl_extra {
+    include!(concat!(env!("OUT_DIR"), "/wgl_extra_bindings.rs"));
+}
+
+#[link(name = "opengl32")]
+extern {}

src/api/win32/headless.rs

@@ -0,0 +1,40 @@
+use super::Window;
+use super::init;
+
+use Api;
+use BuilderAttribs;
+use CreationError;
+
+///
+pub struct HeadlessContext(Window);
+
+impl HeadlessContext {
+    /// See the docs in the crate root file.
+    pub fn new(builder: BuilderAttribs) -> Result<HeadlessContext, CreationError> {
+        let (builder, _) = builder.extract_non_static();
+        init::new_window(builder, None).map(|w| HeadlessContext(w))
+    }
+
+    /// See the docs in the crate root file.
+    pub unsafe fn make_current(&self) {
+        self.0.make_current()
+    }
+
+    /// See the docs in the crate root file.
+    pub fn is_current(&self) -> bool {
+        self.0.is_current()
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_proc_address(&self, addr: &str) -> *const () {
+        self.0.get_proc_address(addr)
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_api(&self) -> Api {
+        Api::OpenGl
+    }
+
+    pub fn set_window_resize_callback(&mut self, _: Option<fn(u32, u32)>) {
+    }
+}

src/api/win32/init.rs

@@ -0,0 +1,586 @@
+use std::sync::atomic::AtomicBool;
+use std::sync::{Arc, Mutex};
+use std::io;
+use std::ptr;
+use std::mem;
+use std::thread;
+
+use super::callback;
+use super::Window;
+use super::MonitorID;
+use super::ContextWrapper;
+use super::WindowWrapper;
+use super::make_current_guard::CurrentContextGuard;
+
+use Api;
+use BuilderAttribs;
+use CreationError;
+use CreationError::OsError;
+use CursorState;
+use GlRequest;
+use PixelFormat;
+
+use std::ffi::{CStr, CString, OsStr};
+use std::os::windows::ffi::OsStrExt;
+use std::sync::mpsc::channel;
+
+use libc;
+use super::gl;
+use winapi;
+use kernel32;
+use user32;
+use gdi32;
+
+/// Work-around the fact that HGLRC doesn't implement Send
+pub struct ContextHack(pub winapi::HGLRC);
+unsafe impl Send for ContextHack {}
+
+pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>)
+                  -> Result<Window, CreationError>
+{
+    // initializing variables to be sent to the task
+
+    let title = OsStr::new(&builder.title).encode_wide().chain(Some(0).into_iter())
+                                          .collect::<Vec<_>>();
+
+    let (tx, rx) = channel();
+
+    // `GetMessage` must be called in the same thread as CreateWindow, so we create a new thread
+    // dedicated to this window.
+    thread::spawn(move || {
+        unsafe {
+            // creating and sending the `Window`
+            match init(title, builder, builder_sharelists) {
+                Ok(w) => tx.send(Ok(w)).ok(),
+                Err(e) => {
+                    tx.send(Err(e)).ok();
+                    return;
+                }
+            };
+
+            // now that the `Window` struct is initialized, the main `Window::new()` function will
+            //  return and this events loop will run in parallel
+            loop {
+                let mut msg = mem::uninitialized();
+
+                if user32::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) == 0 {
+                    break;
+                }
+
+                user32::TranslateMessage(&msg);
+                user32::DispatchMessageW(&msg);   // calls `callback` (see the callback module)
+            }
+        }
+    });
+
+    rx.recv().unwrap()
+}
+
+unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>,
+               builder_sharelists: Option<ContextHack>) -> Result<Window, CreationError>
+{
+    let builder_sharelists = builder_sharelists.map(|s| s.0);
+
+    // registering the window class
+    let class_name = register_window_class();
+
+    // building a RECT object with coordinates
+    let mut rect = winapi::RECT {
+        left: 0, right: builder.dimensions.unwrap_or((1024, 768)).0 as winapi::LONG,
+        top: 0, bottom: builder.dimensions.unwrap_or((1024, 768)).1 as winapi::LONG,
+    };
+
+    // switching to fullscreen if necessary
+    // this means adjusting the window's position so that it overlaps the right monitor,
+    //  and change the monitor's resolution if necessary
+    if builder.monitor.is_some() {
+        let monitor = builder.monitor.as_ref().unwrap();
+        try!(switch_to_fullscreen(&mut rect, monitor));
+    }
+
+    // computing the style and extended style of the window
+    let (ex_style, style) = if builder.monitor.is_some() {
+        (winapi::WS_EX_APPWINDOW, winapi::WS_POPUP | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN)
+    } else {
+        (winapi::WS_EX_APPWINDOW | winapi::WS_EX_WINDOWEDGE,
+            winapi::WS_OVERLAPPEDWINDOW | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN)
+    };
+
+    // adjusting the window coordinates using the style
+    user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
+
+    // the first step is to create a dummy window and a dummy context which we will use
+    // to load the pointers to some functions in the OpenGL driver in `extra_functions`
+    let extra_functions = {
+        // creating a dummy invisible window
+        let dummy_window = {
+            let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
+                title.as_ptr() as winapi::LPCWSTR,
+                style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
+                winapi::CW_USEDEFAULT, winapi::CW_USEDEFAULT,
+                rect.right - rect.left, rect.bottom - rect.top,
+                ptr::null_mut(), ptr::null_mut(), kernel32::GetModuleHandleW(ptr::null()),
+                ptr::null_mut());
+
+            if handle.is_null() {
+                return Err(OsError(format!("CreateWindowEx function failed: {}",
+                                           format!("{}", io::Error::last_os_error()))));
+            }
+
+            let hdc = user32::GetDC(handle);
+            if hdc.is_null() {
+                let err = Err(OsError(format!("GetDC function failed: {}",
+                                              format!("{}", io::Error::last_os_error()))));
+                return err;
+            }
+
+            WindowWrapper(handle, hdc)
+        };
+
+        // getting the pixel format that we will use and setting it
+        {
+            let formats = enumerate_native_pixel_formats(&dummy_window);
+            let id = try!(choose_dummy_pixel_format(formats.into_iter()));
+            try!(set_pixel_format(&dummy_window, id));
+        }
+
+        // creating the dummy OpenGL context and making it current
+        let dummy_context = try!(create_context(None, &dummy_window, None));
+        let current_context = try!(CurrentContextGuard::make_current(&dummy_window,
+                                                                     &dummy_context));
+
+        // loading the extra WGL functions
+        gl::wgl_extra::Wgl::load_with(|addr| {
+            use libc;
+
+            let addr = CString::new(addr.as_bytes()).unwrap();
+            let addr = addr.as_ptr();
+
+            gl::wgl::GetProcAddress(addr) as *const libc::c_void
+        })
+    };
+
+    // creating the real window this time, by using the functions in `extra_functions`
+    let real_window = {
+        let (width, height) = if builder.monitor.is_some() || builder.dimensions.is_some() {
+            (Some(rect.right - rect.left), Some(rect.bottom - rect.top))
+        } else {
+            (None, None)
+        };
+
+        let (x, y) = if builder.monitor.is_some() {
+            (Some(rect.left), Some(rect.top))
+        } else {
+            (None, None)
+        };
+
+        let style = if !builder.visible || builder.headless {
+            style
+        } else {
+            style | winapi::WS_VISIBLE
+        };
+
+        let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
+            title.as_ptr() as winapi::LPCWSTR,
+            style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
+            x.unwrap_or(winapi::CW_USEDEFAULT), y.unwrap_or(winapi::CW_USEDEFAULT),
+            width.unwrap_or(winapi::CW_USEDEFAULT), height.unwrap_or(winapi::CW_USEDEFAULT),
+            ptr::null_mut(), ptr::null_mut(), kernel32::GetModuleHandleW(ptr::null()),
+            ptr::null_mut());
+
+        if handle.is_null() {
+            return Err(OsError(format!("CreateWindowEx function failed: {}",
+                                       format!("{}", io::Error::last_os_error()))));
+        }
+
+        let hdc = user32::GetDC(handle);
+        if hdc.is_null() {
+            return Err(OsError(format!("GetDC function failed: {}",
+                                       format!("{}", io::Error::last_os_error()))));
+        }
+
+        WindowWrapper(handle, hdc)
+    };
+
+    // calling SetPixelFormat
+    let pixel_format = {
+        let formats = if extra_functions.GetPixelFormatAttribivARB.is_loaded() {
+            enumerate_arb_pixel_formats(&extra_functions, &real_window)
+        } else {
+            enumerate_native_pixel_formats(&real_window)
+        };
+
+        let (id, f) = try!(builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a))));
+        try!(set_pixel_format(&real_window, id));
+        f
+    };
+
+    // creating the OpenGL context
+    let context = try!(create_context(Some((&extra_functions, &builder)), &real_window,
+                                      builder_sharelists));
+
+    // calling SetForegroundWindow if fullscreen
+    if builder.monitor.is_some() {
+        user32::SetForegroundWindow(real_window.0);
+    }
+
+    // Creating a mutex to track the current cursor state
+    let cursor_state = Arc::new(Mutex::new(CursorState::Normal));
+
+    // filling the CONTEXT_STASH task-local storage so that we can start receiving events
+    let events_receiver = {
+        let (tx, rx) = channel();
+        let mut tx = Some(tx);
+        callback::CONTEXT_STASH.with(|context_stash| {
+            let data = callback::ThreadLocalData {
+                win: real_window.0,
+                sender: tx.take().unwrap(),
+                cursor_state: cursor_state.clone()
+            };
+            (*context_stash.borrow_mut()) = Some(data);
+        });
+        rx
+    };
+
+    // loading the opengl32 module
+    let gl_library = try!(load_opengl32_dll());
+
+    // handling vsync
+    if builder.vsync {
+        if extra_functions.SwapIntervalEXT.is_loaded() {
+            let _guard = try!(CurrentContextGuard::make_current(&real_window, &context));
+
+            if extra_functions.SwapIntervalEXT(1) == 0 {
+                return Err(OsError(format!("wglSwapIntervalEXT failed")));
+            }
+        }
+    }
+
+    // building the struct
+    Ok(Window {
+        window: real_window,
+        context: context,
+        gl_library: gl_library,
+        events_receiver: events_receiver,
+        is_closed: AtomicBool::new(false),
+        cursor_state: cursor_state,
+        pixel_format: pixel_format,
+    })
+}
+
+unsafe fn register_window_class() -> Vec<u16> {
+    let class_name = OsStr::new("Window Class").encode_wide().chain(Some(0).into_iter())
+                                               .collect::<Vec<_>>();
+    
+    let class = winapi::WNDCLASSEXW {
+        cbSize: mem::size_of::<winapi::WNDCLASSEXW>() as winapi::UINT,
+        style: winapi::CS_HREDRAW | winapi::CS_VREDRAW | winapi::CS_OWNDC,
+        lpfnWndProc: Some(callback::callback),
+        cbClsExtra: 0,
+        cbWndExtra: 0,
+        hInstance: kernel32::GetModuleHandleW(ptr::null()),
+        hIcon: ptr::null_mut(),
+        hCursor: ptr::null_mut(),       // must be null in order for cursor state to work properly
+        hbrBackground: ptr::null_mut(),
+        lpszMenuName: ptr::null(),
+        lpszClassName: class_name.as_ptr(),
+        hIconSm: ptr::null_mut(),
+    };
+
+    // We ignore errors because registering the same window class twice would trigger
+    //  an error, and because errors here are detected during CreateWindowEx anyway.
+    // Also since there is no weird element in the struct, there is no reason for this
+    //  call to fail.
+    user32::RegisterClassExW(&class);
+
+    class_name
+}
+
+unsafe fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID)
+                               -> Result<(), CreationError>
+{
+    // adjusting the rect
+    {
+        let pos = monitor.get_position();
+        rect.left += pos.0 as winapi::LONG;
+        rect.right += pos.0 as winapi::LONG;
+        rect.top += pos.1 as winapi::LONG;
+        rect.bottom += pos.1 as winapi::LONG;
+    }
+
+    // changing device settings
+    let mut screen_settings: winapi::DEVMODEW = mem::zeroed();
+    screen_settings.dmSize = mem::size_of::<winapi::DEVMODEW>() as winapi::WORD;
+    screen_settings.dmPelsWidth = (rect.right - rect.left) as winapi::DWORD;
+    screen_settings.dmPelsHeight = (rect.bottom - rect.top) as winapi::DWORD;
+    screen_settings.dmBitsPerPel = 32;      // TODO: ?
+    screen_settings.dmFields = winapi::DM_BITSPERPEL | winapi::DM_PELSWIDTH | winapi::DM_PELSHEIGHT;
+
+    let result = user32::ChangeDisplaySettingsExW(monitor.get_adapter_name().as_ptr(),
+                                                  &mut screen_settings, ptr::null_mut(),
+                                                  winapi::CDS_FULLSCREEN, ptr::null_mut());
+    
+    if result != winapi::DISP_CHANGE_SUCCESSFUL {
+        return Err(OsError(format!("ChangeDisplaySettings failed: {}", result)));
+    }
+
+    Ok(())
+}
+
+unsafe fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)>,
+                         hdc: &WindowWrapper, share: Option<winapi::HGLRC>)
+                         -> Result<ContextWrapper, CreationError>
+{
+    let share = share.unwrap_or(ptr::null_mut());
+
+    let ctxt = if let Some((extra_functions, builder)) = extra {
+        if extra_functions.CreateContextAttribsARB.is_loaded() {
+            let mut attributes = Vec::new();
+
+            match builder.gl_version {
+                GlRequest::Latest => {},
+                GlRequest::Specific(Api::OpenGl, (major, minor)) => {
+                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
+                    attributes.push(major as libc::c_int);
+                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
+                    attributes.push(minor as libc::c_int);
+                },
+                GlRequest::Specific(Api::OpenGlEs, (major, minor)) => {
+                    if is_extension_supported(extra_functions, hdc,
+                                              "WGL_EXT_create_context_es2_profile")
+                    {
+                        attributes.push(gl::wgl_extra::CONTEXT_PROFILE_MASK_ARB as libc::c_int);
+                        attributes.push(gl::wgl_extra::CONTEXT_ES2_PROFILE_BIT_EXT as libc::c_int);
+                    } else {
+                        return Err(CreationError::NotSupported);
+                    }
+
+                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
+                    attributes.push(major as libc::c_int);
+                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
+                    attributes.push(minor as libc::c_int);
+                },
+                GlRequest::Specific(_, _) => return Err(CreationError::NotSupported),
+                GlRequest::GlThenGles { opengl_version: (major, minor), .. } => {
+                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
+                    attributes.push(major as libc::c_int);
+                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
+                    attributes.push(minor as libc::c_int);
+                },
+            }
+
+            if builder.gl_debug {
+                attributes.push(gl::wgl_extra::CONTEXT_FLAGS_ARB as libc::c_int);
+                attributes.push(gl::wgl_extra::CONTEXT_DEBUG_BIT_ARB as libc::c_int);
+            }
+
+            attributes.push(0);
+
+            Some(extra_functions.CreateContextAttribsARB(hdc.1 as *const libc::c_void,
+                                                         share as *const libc::c_void,
+                                                         attributes.as_ptr()))
+
+        } else {
+            None
+        }
+    } else {
+        None
+    };
+
+    let ctxt = match ctxt {
+        Some(ctxt) => ctxt,
+        None => {
+            let ctxt = gl::wgl::CreateContext(hdc.1 as *const libc::c_void);
+            if !ctxt.is_null() && !share.is_null() {
+                gl::wgl::ShareLists(share as *const libc::c_void, ctxt);
+            };
+            ctxt
+        }
+    };
+
+    if ctxt.is_null() {
+        return Err(OsError(format!("OpenGL context creation failed: {}",
+                           format!("{}", io::Error::last_os_error()))));
+    }
+
+    Ok(ContextWrapper(ctxt as winapi::HGLRC))
+}
+
+unsafe fn enumerate_native_pixel_formats(hdc: &WindowWrapper) -> Vec<(PixelFormat, libc::c_int)> {
+    let size_of_pxfmtdescr = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u32;
+    let num = gdi32::DescribePixelFormat(hdc.1, 1, size_of_pxfmtdescr, ptr::null_mut());
+
+    let mut result = Vec::new();
+
+    for index in (0 .. num) {
+        let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
+        
+        if gdi32::DescribePixelFormat(hdc.1, index, size_of_pxfmtdescr, &mut output) == 0 {
+            continue;
+        }
+
+        if (output.dwFlags & winapi::PFD_DRAW_TO_WINDOW) == 0 {
+            continue;
+        }
+
+        if (output.dwFlags & winapi::PFD_SUPPORT_OPENGL) == 0 {
+            continue;
+        }
+
+        if output.iPixelType != winapi::PFD_TYPE_RGBA {
+            continue;
+        }
+
+        result.push((PixelFormat {
+            hardware_accelerated: (output.dwFlags & winapi::PFD_GENERIC_FORMAT) == 0,
+            red_bits: output.cRedBits,
+            green_bits: output.cGreenBits,
+            blue_bits: output.cBlueBits,
+            alpha_bits: output.cAlphaBits,
+            depth_bits: output.cDepthBits,
+            stencil_bits: output.cStencilBits,
+            stereoscopy: (output.dwFlags & winapi::PFD_STEREO) != 0,
+            double_buffer: (output.dwFlags & winapi::PFD_DOUBLEBUFFER) != 0,
+            multisampling: None,
+            srgb: false,
+        }, index));
+    }
+
+    result
+}
+
+unsafe fn enumerate_arb_pixel_formats(extra: &gl::wgl_extra::Wgl, hdc: &WindowWrapper)
+                                      -> Vec<(PixelFormat, libc::c_int)>
+{
+    let get_info = |index: u32, attrib: u32| {
+        let mut value = mem::uninitialized();
+        extra.GetPixelFormatAttribivARB(hdc.1 as *const libc::c_void, index as libc::c_int,
+                                        0, 1, [attrib as libc::c_int].as_ptr(),
+                                        &mut value);
+        value as u32
+    };
+
+    // getting the number of formats
+    // the `1` is ignored
+    let num = get_info(1, gl::wgl_extra::NUMBER_PIXEL_FORMATS_ARB);
+
+    let mut result = Vec::new();
+
+    for index in (0 .. num) {
+        if get_info(index, gl::wgl_extra::DRAW_TO_WINDOW_ARB) == 0 {
+            continue;
+        }
+        if get_info(index, gl::wgl_extra::SUPPORT_OPENGL_ARB) == 0 {
+            continue;
+        }
+
+        if get_info(index, gl::wgl_extra::ACCELERATION_ARB) == gl::wgl_extra::NO_ACCELERATION_ARB {
+            continue;
+        }
+
+        if get_info(index, gl::wgl_extra::PIXEL_TYPE_ARB) != gl::wgl_extra::TYPE_RGBA_ARB {
+            continue;
+        }
+
+        result.push((PixelFormat {
+            hardware_accelerated: true,
+            red_bits: get_info(index, gl::wgl_extra::RED_BITS_ARB) as u8,
+            green_bits: get_info(index, gl::wgl_extra::GREEN_BITS_ARB) as u8,
+            blue_bits: get_info(index, gl::wgl_extra::BLUE_BITS_ARB) as u8,
+            alpha_bits: get_info(index, gl::wgl_extra::ALPHA_BITS_ARB) as u8,
+            depth_bits: get_info(index, gl::wgl_extra::DEPTH_BITS_ARB) as u8,
+            stencil_bits: get_info(index, gl::wgl_extra::STENCIL_BITS_ARB) as u8,
+            stereoscopy: get_info(index, gl::wgl_extra::STEREO_ARB) != 0,
+            double_buffer: get_info(index, gl::wgl_extra::DOUBLE_BUFFER_ARB) != 0,
+            multisampling: {
+                if is_extension_supported(extra, hdc, "WGL_ARB_multisample") {
+                    match get_info(index, gl::wgl_extra::SAMPLES_ARB) {
+                        0 => None,
+                        a => Some(a as u16),
+                    }
+                } else {
+                    None
+                }
+            },
+            srgb: if is_extension_supported(extra, hdc, "WGL_ARB_framebuffer_sRGB") {
+                get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB) != 0
+            } else if is_extension_supported(extra, hdc, "WGL_EXT_framebuffer_sRGB") {
+                get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_EXT) != 0
+            } else {
+                false
+            },
+        }, index as libc::c_int));
+    }
+
+    result
+}
+
+unsafe fn set_pixel_format(hdc: &WindowWrapper, id: libc::c_int) -> Result<(), CreationError> {
+    let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
+
+    if gdi32::DescribePixelFormat(hdc.1, id, mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>()
+                                  as winapi::UINT, &mut output) == 0
+    {
+        return Err(OsError(format!("DescribePixelFormat function failed: {}",
+                                   format!("{}", io::Error::last_os_error()))));
+    }
+
+    if gdi32::SetPixelFormat(hdc.1, id, &output) == 0 {
+        return Err(OsError(format!("SetPixelFormat function failed: {}",
+                                   format!("{}", io::Error::last_os_error()))));
+    }
+
+    Ok(())
+}
+
+unsafe fn load_opengl32_dll() -> Result<winapi::HMODULE, CreationError> {
+    let name = OsStr::new("opengl32.dll").encode_wide().chain(Some(0).into_iter())
+                                         .collect::<Vec<_>>();
+
+    let lib = kernel32::LoadLibraryW(name.as_ptr());
+
+    if lib.is_null() {
+        return Err(OsError(format!("LoadLibrary function failed: {}",
+                                    format!("{}", io::Error::last_os_error()))));
+    }
+
+    Ok(lib)
+}
+
+unsafe fn is_extension_supported(extra: &gl::wgl_extra::Wgl, hdc: &WindowWrapper,
+                                 extension: &str) -> bool
+{
+    let extensions = if extra.GetExtensionsStringARB.is_loaded() {
+        let data = extra.GetExtensionsStringARB(hdc.1 as *const _);
+        let data = CStr::from_ptr(data).to_bytes().to_vec();
+        String::from_utf8(data).unwrap()
+
+    } else if extra.GetExtensionsStringEXT.is_loaded() {
+        let data = extra.GetExtensionsStringEXT();
+        let data = CStr::from_ptr(data).to_bytes().to_vec();
+        String::from_utf8(data).unwrap()
+
+    } else {
+        return false;
+    };
+
+    extensions.split(" ").find(|&e| e == extension).is_some()
+}
+
+fn choose_dummy_pixel_format<I>(iter: I) -> Result<libc::c_int, CreationError>
+                                where I: Iterator<Item=(PixelFormat, libc::c_int)>
+{
+    let mut backup_id = None;
+
+    for (format, id) in iter {
+        if backup_id.is_none() {
+            backup_id = Some(id);
+        }
+
+        if format.hardware_accelerated {
+            return Ok(id);
+        }
+    }
+
+    backup_id.ok_or(CreationError::NotSupported)
+}

src/api/win32/make_current_guard.rs

@@ -0,0 +1,52 @@
+use std::marker::PhantomData;
+use std::io;
+
+use libc;
+use winapi;
+use CreationError;
+
+use super::gl;
+use super::ContextWrapper;
+use super::WindowWrapper;
+
+/// A guard for when you want to make the context current. Destroying the guard restores the
+/// previously-current context.
+pub struct CurrentContextGuard<'a, 'b> {
+    previous_hdc: winapi::HDC,
+    previous_hglrc: winapi::HGLRC,
+    marker1: PhantomData<&'a ()>,
+    marker2: PhantomData<&'b ()>,
+}
+
+impl<'a, 'b> CurrentContextGuard<'a, 'b> {
+    pub unsafe fn make_current(window: &'a WindowWrapper, context: &'b ContextWrapper)
+                               -> Result<CurrentContextGuard<'a, 'b>, CreationError>
+    {
+        let previous_hdc = gl::wgl::GetCurrentDC() as winapi::HDC;
+        let previous_hglrc = gl::wgl::GetCurrentContext() as winapi::HGLRC;
+
+        let result = gl::wgl::MakeCurrent(window.1 as *const libc::c_void,
+                                          context.0 as *const libc::c_void);
+
+        if result == 0 {
+            return Err(CreationError::OsError(format!("wglMakeCurrent function failed: {}",
+                                                      format!("{}", io::Error::last_os_error()))));
+        }
+
+        Ok(CurrentContextGuard {
+            previous_hdc: previous_hdc,
+            previous_hglrc: previous_hglrc,
+            marker1: PhantomData,
+            marker2: PhantomData,
+        })
+    }
+}
+
+impl<'a, 'b> Drop for CurrentContextGuard<'a, 'b> {
+    fn drop(&mut self) {
+        unsafe {
+            gl::wgl::MakeCurrent(self.previous_hdc as *const libc::c_void,
+                                 self.previous_hglrc as *const libc::c_void);
+        }
+    }
+}

src/api/win32/mod.rs

@@ -0,0 +1,419 @@
+#![cfg(target_os = "windows")]
+
+use std::sync::atomic::AtomicBool;
+use std::mem;
+use std::ptr;
+use std::ffi::CString;
+use std::ffi::OsStr;
+use std::os::windows::ffi::OsStrExt;
+use std::sync::{
+    Arc,
+    Mutex
+};
+use std::sync::mpsc::Receiver;
+use libc;
+use {CreationError, Event, MouseCursor};
+use CursorState;
+
+use PixelFormat;
+use BuilderAttribs;
+
+pub use self::headless::HeadlessContext;
+pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};
+
+use winapi;
+use user32;
+use kernel32;
+use gdi32;
+
+mod callback;
+mod event;
+mod gl;
+mod headless;
+mod init;
+mod make_current_guard;
+mod monitor;
+
+/// The Win32 implementation of the main `Window` object.
+pub struct Window {
+    /// Main handle for the window.
+    window: WindowWrapper,
+
+    /// OpenGL context.
+    context: ContextWrapper,
+
+    /// Binded to `opengl32.dll`.
+    ///
+    /// `wglGetProcAddress` returns null for GL 1.1 functions because they are
+    ///  already defined by the system. This module contains them.
+    gl_library: winapi::HMODULE,
+
+    /// Receiver for the events dispatched by the window callback.
+    events_receiver: Receiver<Event>,
+
+    /// True if a `Closed` event has been received.
+    is_closed: AtomicBool,
+
+    /// The current cursor state.
+    cursor_state: Arc<Mutex<CursorState>>,
+
+    /// The pixel format that has been used to create this window.
+    pixel_format: PixelFormat,
+}
+
+unsafe impl Send for Window {}
+unsafe impl Sync for Window {}
+
+/// A simple wrapper that destroys the context when it is destroyed.
+// FIXME: remove `pub` (https://github.com/rust-lang/rust/issues/23585)
+#[doc(hidden)]
+pub struct ContextWrapper(pub winapi::HGLRC);
+
+impl Drop for ContextWrapper {
+    fn drop(&mut self) {
+        unsafe {
+            gl::wgl::DeleteContext(self.0 as *const libc::c_void);
+        }
+    }
+}
+
+/// A simple wrapper that destroys the window when it is destroyed.
+// FIXME: remove `pub` (https://github.com/rust-lang/rust/issues/23585)
+#[doc(hidden)]
+pub struct WindowWrapper(pub winapi::HWND, pub winapi::HDC);
+
+impl Drop for WindowWrapper {
+    fn drop(&mut self) {
+        unsafe {
+            user32::DestroyWindow(self.0);
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct WindowProxy;
+
+impl WindowProxy {
+    pub fn wakeup_event_loop(&self) {
+        unimplemented!()
+    }
+}
+
+impl Window {
+    /// See the docs in the crate root file.
+    pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> {
+        let (builder, sharing) = builder.extract_non_static();
+        let sharing = sharing.map(|w| init::ContextHack(w.context.0));
+        init::new_window(builder, sharing)
+    }
+
+    /// See the docs in the crate root file.
+    pub fn is_closed(&self) -> bool {
+        use std::sync::atomic::Ordering::Relaxed;
+        self.is_closed.load(Relaxed)
+    }
+
+    /// See the docs in the crate root file.
+    ///
+    /// Calls SetWindowText on the HWND.
+    pub fn set_title(&self, text: &str) {
+        let text = OsStr::new(text).encode_wide().chain(Some(0).into_iter())
+                                   .collect::<Vec<_>>();
+
+        unsafe {
+            user32::SetWindowTextW(self.window.0, text.as_ptr() as winapi::LPCWSTR);
+        }
+    }
+
+    pub fn show(&self) {
+        unsafe {
+            user32::ShowWindow(self.window.0, winapi::SW_SHOW);
+        }
+    }
+
+    pub fn hide(&self) {
+        unsafe {
+            user32::ShowWindow(self.window.0, winapi::SW_HIDE);
+        }
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_position(&self) -> Option<(i32, i32)> {
+        use std::mem;
+
+        let mut placement: winapi::WINDOWPLACEMENT = unsafe { mem::zeroed() };
+        placement.length = mem::size_of::<winapi::WINDOWPLACEMENT>() as winapi::UINT;
+
+        if unsafe { user32::GetWindowPlacement(self.window.0, &mut placement) } == 0 {
+            return None
+        }
+
+        let ref rect = placement.rcNormalPosition;
+        Some((rect.left as i32, rect.top as i32))
+    }
+
+    /// See the docs in the crate root file.
+    pub fn set_position(&self, x: i32, y: i32) {
+        use libc;
+
+        unsafe {
+            user32::SetWindowPos(self.window.0, ptr::null_mut(), x as libc::c_int, y as libc::c_int,
+                0, 0, winapi::SWP_NOZORDER | winapi::SWP_NOSIZE);
+            user32::UpdateWindow(self.window.0);
+        }
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_inner_size(&self) -> Option<(u32, u32)> {
+        let mut rect: winapi::RECT = unsafe { mem::uninitialized() };
+
+        if unsafe { user32::GetClientRect(self.window.0, &mut rect) } == 0 {
+            return None
+        }
+
+        Some((
+            (rect.right - rect.left) as u32,
+            (rect.bottom - rect.top) as u32
+        ))
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_outer_size(&self) -> Option<(u32, u32)> {
+        let mut rect: winapi::RECT = unsafe { mem::uninitialized() };
+
+        if unsafe { user32::GetWindowRect(self.window.0, &mut rect) } == 0 {
+            return None
+        }
+
+        Some((
+            (rect.right - rect.left) as u32,
+            (rect.bottom - rect.top) as u32
+        ))
+    }
+
+    /// See the docs in the crate root file.
+    pub fn set_inner_size(&self, x: u32, y: u32) {
+        use libc;
+
+        unsafe {
+            user32::SetWindowPos(self.window.0, ptr::null_mut(), 0, 0, x as libc::c_int,
+                y as libc::c_int, winapi::SWP_NOZORDER | winapi::SWP_NOREPOSITION);
+            user32::UpdateWindow(self.window.0);
+        }
+    }
+
+    pub fn create_window_proxy(&self) -> WindowProxy {
+        WindowProxy
+    }
+
+    /// See the docs in the crate root file.
+    pub fn poll_events(&self) -> PollEventsIterator {
+        PollEventsIterator {
+            window: self,
+        }
+    }
+
+    /// See the docs in the crate root file.
+    pub fn wait_events(&self) -> WaitEventsIterator {
+        WaitEventsIterator {
+            window: self,
+        }
+    }
+
+    /// See the docs in the crate root file.
+    pub unsafe fn make_current(&self) {
+        // TODO: check return value
+        gl::wgl::MakeCurrent(self.window.1 as *const libc::c_void,
+                             self.context.0 as *const libc::c_void);
+    }
+
+    /// See the docs in the crate root file.
+    pub fn is_current(&self) -> bool {
+        unsafe { gl::wgl::GetCurrentContext() == self.context.0 as *const libc::c_void }
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_proc_address(&self, addr: &str) -> *const () {
+        let addr = CString::new(addr.as_bytes()).unwrap();
+        let addr = addr.as_ptr();
+
+        unsafe {
+            let p = gl::wgl::GetProcAddress(addr) as *const ();
+            if !p.is_null() { return p; }
+            kernel32::GetProcAddress(self.gl_library, addr) as *const ()
+        }
+    }
+
+    /// See the docs in the crate root file.
+    pub fn swap_buffers(&self) {
+        unsafe {
+            gdi32::SwapBuffers(self.window.1);
+        }
+    }
+
+    pub fn platform_display(&self) -> *mut libc::c_void {
+        unimplemented!()
+    }
+
+    pub fn platform_window(&self) -> *mut libc::c_void {
+        self.window.0 as *mut libc::c_void
+    }
+
+    /// See the docs in the crate root file.
+    pub fn get_api(&self) -> ::Api {
+        ::Api::OpenGl
+    }
+
+    pub fn get_pixel_format(&self) -> PixelFormat {
+        self.pixel_format.clone()
+    }
+
+    pub fn set_window_resize_callback(&mut self, _: Option<fn(u32, u32)>) {
+    }
+
+    pub fn set_cursor(&self, _cursor: MouseCursor) {
+        unimplemented!()
+    }
+
+    pub fn set_cursor_state(&self, state: CursorState) -> Result<(), String> {
+        let mut current_state = self.cursor_state.lock().unwrap();
+
+        let foreground_thread_id = unsafe { user32::GetWindowThreadProcessId(self.window.0, ptr::null_mut()) };
+        let current_thread_id = unsafe { kernel32::GetCurrentThreadId() };
+
+        unsafe { user32::AttachThreadInput(foreground_thread_id, current_thread_id, 1) };
+
+        let res = match (state, *current_state) {
+            (CursorState::Normal, CursorState::Normal) => Ok(()),
+            (CursorState::Hide, CursorState::Hide) => Ok(()),
+            (CursorState::Grab, CursorState::Grab) => Ok(()),
+
+            (CursorState::Hide, CursorState::Normal) => {
+                unsafe {
+                    user32::SetCursor(ptr::null_mut());
+                    *current_state = CursorState::Hide;
+                    Ok(())
+                }
+            },
+
+            (CursorState::Normal, CursorState::Hide) => {
+                unsafe {
+                    user32::SetCursor(user32::LoadCursorW(ptr::null_mut(), winapi::IDC_ARROW));
+                    *current_state = CursorState::Normal;
+                    Ok(())
+                }
+            },
+
+            (CursorState::Grab, CursorState::Normal) => {
+                unsafe {
+                    user32::SetCursor(ptr::null_mut());
+                    let mut rect = mem::uninitialized();
+                    if user32::GetClientRect(self.window.0, &mut rect) == 0 {
+                        return Err(format!("GetWindowRect failed"));
+                    }
+                    user32::ClientToScreen(self.window.0, mem::transmute(&mut rect.left));
+                    user32::ClientToScreen(self.window.0, mem::transmute(&mut rect.right));
+                    if user32::ClipCursor(&rect) == 0 {
+                        return Err(format!("ClipCursor failed"));
+                    }
+                    *current_state = CursorState::Grab;
+                    Ok(())
+                }
+            },
+
+            (CursorState::Normal, CursorState::Grab) => {
+                unsafe {
+                    user32::SetCursor(user32::LoadCursorW(ptr::null_mut(), winapi::IDC_ARROW));
+                    if user32::ClipCursor(ptr::null()) == 0 {
+                        return Err(format!("ClipCursor failed"));
+                    }
+                    *current_state = CursorState::Normal;
+                    Ok(())
+                }
+            },
+
+            _ => unimplemented!(),
+        };
+
+        unsafe { user32::AttachThreadInput(foreground_thread_id, current_thread_id, 0) };
+
+        res
+    }
+
+    pub fn hidpi_factor(&self) -> f32 {
+        1.0
+    }
+
+    pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
+        let mut point = winapi::POINT {
+            x: x,
+            y: y,
+        };
+
+        unsafe {
+            if user32::ClientToScreen(self.window.0, &mut point) == 0 {
+                return Err(());
+            }
+
+            if user32::SetCursorPos(point.x, point.y) == 0 {
+                return Err(());
+            }
+        }
+
+        Ok(())
+    }
+}
+
+pub struct PollEventsIterator<'a> {
+    window: &'a Window,
+}
+
+impl<'a> Iterator for PollEventsIterator<'a> {
+    type Item = Event;
+
+    fn next(&mut self) -> Option<Event> {
+        use events::Event::Closed;
+
+        match self.window.events_receiver.try_recv() {
+            Ok(Closed) => {
+                use std::sync::atomic::Ordering::Relaxed;
+                self.window.is_closed.store(true, Relaxed);
+                Some(Closed)
+            },
+            Ok(ev) => Some(ev),
+            Err(_) => None
+        }
+    }
+}
+
+pub struct WaitEventsIterator<'a> {
+    window: &'a Window,
+}
+
+impl<'a> Iterator for WaitEventsIterator<'a> {
+    type Item = Event;
+
+    fn next(&mut self) -> Option<Event> {
+        use events::Event::Closed;
+
+        match self.window.events_receiver.recv() {
+            Ok(Closed) => {
+                use std::sync::atomic::Ordering::Relaxed;
+                self.window.is_closed.store(true, Relaxed);
+                Some(Closed)
+            },
+            Ok(ev) => Some(ev),
+            Err(_) => None
+        }
+    }
+}
+
+impl Drop for Window {
+    fn drop(&mut self) {
+        unsafe {
+            // we don't call MakeCurrent(0, 0) because we are not sure that the context
+            // is still the current one
+            user32::PostMessageW(self.window.0, winapi::WM_DESTROY, 0, 0);
+        }
+    }
+}

src/api/win32/monitor.rs

@@ -0,0 +1,180 @@
+use winapi;
+use user32;
+
+use std::collections::VecDeque;
+use std::mem;
+
+use native_monitor::NativeMonitorId;
+
+/// Win32 implementation of the main `MonitorID` object.
+pub struct MonitorID {
+    /// The system name of the adapter.
+    adapter_name: [winapi::WCHAR; 32],
+
+    /// The system name of the monitor.
+    monitor_name: String,
+
+    /// Name to give to the user.
+    readable_name: String,
+
+    /// See the `StateFlags` element here:
+    /// http://msdn.microsoft.com/en-us/library/dd183569(v=vs.85).aspx
+    flags: winapi::DWORD,
+
+    /// True if this is the primary monitor.
+    primary: bool,
+
+    /// The position of the monitor in pixels on the desktop.
+    ///
+    /// A window that is positionned at these coordinates will overlap the monitor.
+    position: (u32, u32),
+
+    /// The current resolution in pixels on the monitor.
+    dimensions: (u32, u32),
+}
+
+struct DeviceEnumerator {
+    parent_device: *const winapi::WCHAR,
+    current_index: u32,
+}
+
+impl DeviceEnumerator {
+    fn adapters() -> DeviceEnumerator {
+        use std::ptr;
+        DeviceEnumerator {
+            parent_device: ptr::null(),
+            current_index: 0
+        }
+    }
+
+    fn monitors(adapter_name: *const winapi::WCHAR) -> DeviceEnumerator {
+        DeviceEnumerator {
+            parent_device: adapter_name,
+            current_index: 0
+        }
+    }
+}
+
+impl Iterator for DeviceEnumerator {
+    type Item = winapi::DISPLAY_DEVICEW;
+    fn next(&mut self) -> Option<winapi::DISPLAY_DEVICEW> {
+        use std::mem;
+        loop {
+            let mut output: winapi::DISPLAY_DEVICEW = unsafe { mem::zeroed() };
+            output.cb = mem::size_of::<winapi::DISPLAY_DEVICEW>() as winapi::DWORD;
+
+            if unsafe { user32::EnumDisplayDevicesW(self.parent_device,
+                self.current_index as winapi::DWORD, &mut output, 0) } == 0
+            {
+                // the device doesn't exist, which means we have finished enumerating
+                break;
+            }
+            self.current_index += 1;
+
+            if  (output.StateFlags & winapi::DISPLAY_DEVICE_ACTIVE) == 0 ||
+                (output.StateFlags & winapi::DISPLAY_DEVICE_MIRRORING_DRIVER) != 0
+            {
+                // the device is not active
+                // the Win32 api usually returns a lot of inactive devices
+                continue;
+            }
+
+            return Some(output);
+        }
+        None
+    }
+}
+
+fn wchar_as_string(wchar: &[winapi::WCHAR]) -> String {
+    String::from_utf16_lossy(wchar)
+        .trim_right_matches(0 as char)
+        .to_string()
+}
+
+/// Win32 implementation of the main `get_available_monitors` function.
+pub fn get_available_monitors() -> VecDeque<MonitorID> {
+    // return value
+    let mut result = VecDeque::new();
+
+    for adapter in DeviceEnumerator::adapters() {
+        // getting the position
+        let (position, dimensions) = unsafe {
+            let mut dev: winapi::DEVMODEW = mem::zeroed();
+            dev.dmSize = mem::size_of::<winapi::DEVMODEW>() as winapi::WORD;
+
+            if user32::EnumDisplaySettingsExW(adapter.DeviceName.as_ptr(), 
+                winapi::ENUM_CURRENT_SETTINGS,
+                &mut dev, 0) == 0
+            {
+                continue;
+            }
+
+            let point: &winapi::POINTL = mem::transmute(&dev.union1);
+            let position = (point.x as u32, point.y as u32);
+
+            let dimensions = (dev.dmPelsWidth as u32, dev.dmPelsHeight as u32);
+
+            (position, dimensions)
+        };
+
+        for (num, monitor) in DeviceEnumerator::monitors(adapter.DeviceName.as_ptr()).enumerate() {
+            // adding to the resulting list
+            result.push_back(MonitorID {
+                adapter_name: adapter.DeviceName,
+                monitor_name: wchar_as_string(&monitor.DeviceName),
+                readable_name: wchar_as_string(&monitor.DeviceString),
+                flags: monitor.StateFlags,
+                primary: (adapter.StateFlags & winapi::DISPLAY_DEVICE_PRIMARY_DEVICE) != 0 &&
+                         num == 0,
+                position: position,
+                dimensions: dimensions,
+            });
+        }
+    }
+    result
+}
+
+/// Win32 implementation of the main `get_primary_monitor` function.
+pub fn get_primary_monitor() -> MonitorID {
+    // we simply get all available monitors and return the one with the `PRIMARY_DEVICE` flag
+    // TODO: it is possible to query the win32 API for the primary monitor, this should be done
+    //  instead
+    for monitor in get_available_monitors().into_iter() {
+        if monitor.primary {
+            return monitor;
+        }
+    }
+
+    panic!("Failed to find the primary monitor")
+}
+
+impl MonitorID {
+    /// See the docs if the crate root file.
+    pub fn get_name(&self) -> Option<String> {
+        Some(self.readable_name.clone())
+    }
+
+    /// See the docs of the crate root file.
+    pub fn get_native_identifier(&self) -> NativeMonitorId {
+        NativeMonitorId::Name(self.monitor_name.clone())
+    }
+
+    /// See the docs if the crate root file.
+    pub fn get_dimensions(&self) -> (u32, u32) {
+        // TODO: retreive the dimensions every time this is called
+        self.dimensions
+    }
+
+    /// This is a Win32-only function for `MonitorID` that returns the system name of the adapter
+    /// device.
+    pub fn get_adapter_name(&self) -> &[winapi::WCHAR] {
+        &self.adapter_name
+    }
+
+    /// This is a Win32-only function for `MonitorID` that returns the position of the
+    ///  monitor on the desktop.
+    /// A window that is positionned at these coordinates will overlap the monitor.
+    pub fn get_position(&self) -> (u32, u32) {
+        self.position
+    }
+}