use std::kinds::marker::NoSend; use std::sync::Mutex; use std::sync::atomics::AtomicBool; use std::ptr; use {Event, Hints}; mod ffi; pub struct Window { window: ffi::HWND, hdc: ffi::HDC, context: ffi::HGLRC, gl_library: ffi::HMODULE, events_receiver: Receiver, should_close: AtomicBool, nosend: NoSend, } /// Stores the list of all the windows. /// Only available on callback thread. local_data_key!(pub WINDOWS_LIST: Mutex)>>) impl Window { pub fn new(dimensions: Option<(uint, uint)>, title: &str, _hints: &Hints) -> Result { use std::mem; use std::os; // initializing WINDOWS_LIST if needed // this is safe because WINDOWS_LIST is task-local if WINDOWS_LIST.get().is_none() { WINDOWS_LIST.replace(Some(Mutex::new(Vec::new()))); } // registering the window class let class_name: Vec = "Window Class".utf16_units().collect::>() .append_one(0); let class = ffi::WNDCLASSEX { cbSize: mem::size_of::() as ffi::UINT, style: ffi::CS_HREDRAW | ffi::CS_VREDRAW, lpfnWndProc: callback, cbClsExtra: 0, cbWndExtra: 0, hInstance: unsafe { ffi::GetModuleHandleW(ptr::null()) }, hIcon: ptr::mut_null(), hCursor: ptr::mut_null(), hbrBackground: ptr::mut_null(), lpszMenuName: ptr::null(), lpszClassName: class_name.as_ptr(), hIconSm: ptr::mut_null(), }; if unsafe { ffi::RegisterClassExW(&class) } == 0 { use std::os; return Err(format!("RegisterClassEx function failed: {}", os::error_string(os::errno() as uint))) } // creating the window let handle = unsafe { use libc; let handle = ffi::CreateWindowExW(0, class_name.as_ptr(), title.utf16_units().collect::>().append_one(0).as_ptr() as ffi::LPCWSTR, ffi::WS_OVERLAPPEDWINDOW | ffi::WS_VISIBLE, dimensions.map(|(x, _)| x as libc::c_int).unwrap_or(ffi::CW_USEDEFAULT), dimensions.map(|(_, y)| y as libc::c_int).unwrap_or(ffi::CW_USEDEFAULT), ffi::CW_USEDEFAULT, ffi::CW_USEDEFAULT, ptr::mut_null(), ptr::mut_null(), ffi::GetModuleHandleW(ptr::null()), ptr::mut_null()); if handle.is_null() { use std::os; return Err(format!("CreateWindowEx function failed: {}", os::error_string(os::errno() as uint))) } handle }; // adding it to WINDOWS_LIST let events_receiver = { let (tx, rx) = channel(); let list = WINDOWS_LIST.get().unwrap(); let mut list = list.lock(); list.push((handle, tx)); rx }; // Getting the HDC of the window let hdc = { let hdc = unsafe { ffi::GetDC(handle) }; if hdc.is_null() { return Err(format!("GetDC function failed: {}", os::error_string(os::errno() as uint))) } hdc }; // getting the pixel format that we will use // TODO: use something cleaner which uses hints let pixel_format = { let mut output: ffi::PIXELFORMATDESCRIPTOR = unsafe { mem::uninitialized() }; if unsafe { ffi::DescribePixelFormat(hdc, 1, mem::size_of::() as ffi::UINT, &mut output) } == 0 { return Err(format!("DescribePixelFormat function failed: {}", os::error_string(os::errno() as uint))) } output }; // calling SetPixelFormat unsafe { if ffi::SetPixelFormat(hdc, 1, &pixel_format) == 0 { return Err(format!("SetPixelFormat function failed: {}", os::error_string(os::errno() as uint))) } } // creating the context let context = { let ctxt = unsafe { ffi::wglCreateContext(hdc) }; if ctxt.is_null() { return Err(format!("wglCreateContext function failed: {}", os::error_string(os::errno() as uint))) } ctxt }; // loading opengl32 let gl_library = { let name = "opengl32.dll".utf16_units().collect::>().append_one(0).as_ptr(); let lib = unsafe { ffi::LoadLibraryW(name) }; if lib.is_null() { return Err(format!("LoadLibrary function failed: {}", os::error_string(os::errno() as uint))) } lib }; // building the struct Ok(Window{ window: handle, hdc: hdc, context: context, gl_library: gl_library, events_receiver: events_receiver, should_close: AtomicBool::new(false), nosend: NoSend, }) } pub fn should_close(&self) -> bool { use std::sync::atomics::Relaxed; self.should_close.load(Relaxed) } /// Calls SetWindowText on the HWND. pub fn set_title(&self, text: &str) { unsafe { ffi::SetWindowTextW(self.window, text.utf16_units().collect::>().append_one(0).as_ptr() as ffi::LPCWSTR); } } pub fn get_position(&self) -> (uint, uint) { unimplemented!() } pub fn set_position(&self, x: uint, y: uint) { use libc; unsafe { ffi::SetWindowPos(self.window, ptr::mut_null(), x as libc::c_int, y as libc::c_int, 0, 0, ffi::SWP_NOZORDER | ffi::SWP_NOSIZE); ffi::UpdateWindow(self.window); } } pub fn get_size(&self) -> (uint, uint) { unimplemented!() } pub fn set_size(&self, x: uint, y: uint) { use libc; unsafe { ffi::SetWindowPos(self.window, ptr::mut_null(), 0, 0, x as libc::c_int, y as libc::c_int, ffi::SWP_NOZORDER | ffi::SWP_NOREPOSITION); ffi::UpdateWindow(self.window); } } // TODO: return iterator pub fn poll_events(&self) -> Vec { unimplemented!() } // TODO: return iterator pub fn wait_events(&self) -> Vec { use std::mem; { let mut msg = unsafe { mem::uninitialized() }; if unsafe { ffi::GetMessageW(&mut msg, ptr::mut_null(), 0, 0) } == 0 { use std::sync::atomics::Relaxed; use Closed; self.should_close.store(true, Relaxed); return vec![Closed] } unsafe { ffi::TranslateMessage(&msg) }; unsafe { ffi::DispatchMessageW(&msg) }; } let mut events = Vec::new(); loop { match self.events_receiver.try_recv() { Ok(ev) => events.push(ev), Err(_) => break } } events } pub fn make_current(&self) { unsafe { ffi::wglMakeCurrent(self.hdc, self.context) } } pub fn get_proc_address(&self, addr: &str) -> *const () { use std::c_str::ToCStr; unsafe { addr.with_c_str(|s| { let p = ffi::wglGetProcAddress(s) as *const (); if !p.is_null() { return p; } ffi::GetProcAddress(self.gl_library, s) as *const () }) } } pub fn swap_buffers(&self) { unsafe { ffi::SwapBuffers(self.hdc); } } } #[unsafe_destructor] impl Drop for Window { fn drop(&mut self) { unsafe { ffi::DestroyWindow(self.window); } } } fn send_event(window: ffi::HWND, event: Event) { let locked = WINDOWS_LIST.get().unwrap(); let mut locked = locked.lock(); locked.retain(|&(ref val, ref sender)| { if val != &window { return true } sender.send_opt(event).is_ok() }); } extern "stdcall" fn callback(window: ffi::HWND, msg: ffi::UINT, wparam: ffi::WPARAM, lparam: ffi::LPARAM) -> ffi::LRESULT { match msg { ffi::WM_DESTROY => { use Closed; send_event(window, Closed); unsafe { ffi::PostQuitMessage(0); } 0 }, ffi::WM_SIZE => { use SizeChanged; let w = ffi::LOWORD(lparam as ffi::DWORD) as uint; let h = ffi::HIWORD(lparam as ffi::DWORD) as uint; send_event(window, SizeChanged(w, h)); 0 }, ffi::WM_PAINT => { use NeedRefresh; send_event(window, NeedRefresh); 0 }, ffi::WM_MOUSEMOVE => { use CursorPositionChanged; let x = ffi::GET_X_LPARAM(lparam) as uint; let y = ffi::GET_Y_LPARAM(lparam) as uint; send_event(window, CursorPositionChanged(x, y)); 0 }, _ => unsafe { ffi::DefWindowProcW(window, msg, wparam, lparam) } } } /*fn hints_to_pixelformat(hints: &Hints) -> ffi::PIXELFORMATDESCRIPTOR { use std::mem; ffi::PIXELFORMATDESCRIPTOR { nSize: size_of::(), nVersion: 1, dwFlags: if hints.stereo { PFD_STEREO } else { 0 }, iPixelType: PFD_TYPE_RGBA, cColorBits: hints.red_bits + hints.green_bits + hints.blue_bits, cRedBits: pub nSize: WORD, pub nVersion: WORD, pub dwFlags: DWORD, pub iPixelType: BYTE, pub cColorBits: BYTE, pub cRedBits: BYTE, pub cRedShift: BYTE, pub cGreenBits: BYTE, pub cGreenShift: BYTE, pub cBlueBits: BYTE, pub cBlueShift: BYTE, pub cAlphaBits: BYTE, pub cAlphaShift: BYTE, pub cAccumBits: BYTE, pub cAccumRedBits: BYTE, pub cAccumGreenBits: BYTE, pub cAccumBlueBits: BYTE, pub cAccumAlphaBits: BYTE, pub cDepthBits: BYTE, pub cStencilBits: BYTE, pub cAuxBuffers: BYTE, pub iLayerType: BYTE, pub bReserved: BYTE, pub dwLayerMask: DWORD, pub dwVisibleMask: DWORD, pub dwDamageMask: DWORD, } }*/