use std::sync::atomic::AtomicBool; use std::ptr; use Event; #[cfg(feature = "window")] use WindowBuilder; #[cfg(feature = "headless")] use HeadlessRendererBuilder; pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor}; mod event; mod ffi; mod init; mod monitor; /// #[cfg(feature = "headless")] pub struct HeadlessContext(Window); #[cfg(feature = "headless")] impl HeadlessContext { /// See the docs in the crate root file. pub fn new(builder: HeadlessRendererBuilder) -> Result { let HeadlessRendererBuilder { dimensions, gl_version } = builder; init::new_window(Some(dimensions), "".to_string(), None, gl_version, true) .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 get_proc_address(&self, addr: &str) -> *const () { self.0.get_proc_address(addr) } } /// The Win32 implementation of the main `Window` object. pub struct Window { /// Main handle for the window. window: ffi::HWND, /// This represents a "draw context" for the surface of the window. hdc: ffi::HDC, /// OpenGL context. context: ffi::HGLRC, /// 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: ffi::HMODULE, /// Receiver for the events dispatched by the window callback. events_receiver: Receiver, /// True if a `Closed` event has been received. is_closed: AtomicBool, } #[cfg(feature = "window")] impl Window { /// See the docs in the crate root file. pub fn new(builder: WindowBuilder) -> Result { let WindowBuilder { dimensions, title, monitor, gl_version } = builder; init::new_window(dimensions, title, monitor, gl_version, false) } } impl Window { /// See the docs in the crate root file. pub fn is_closed(&self) -> bool { use std::sync::atomic::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) { unsafe { ffi::SetWindowTextW(self.window, text.utf16_units().chain(Some(0).into_iter()) .collect::>().as_ptr() as ffi::LPCWSTR); } } /// See the docs in the crate root file. pub fn get_position(&self) -> Option<(int, int)> { use std::mem; let mut placement: ffi::WINDOWPLACEMENT = unsafe { mem::zeroed() }; placement.length = mem::size_of::() as ffi::UINT; if unsafe { ffi::GetWindowPlacement(self.window, &mut placement) } == 0 { return None } let ref rect = placement.rcNormalPosition; Some((rect.left as int, rect.top as int)) } /// See the docs in the crate root file. pub fn set_position(&self, x: int, y: int) { use libc; unsafe { ffi::SetWindowPos(self.window, ptr::null(), x as libc::c_int, y as libc::c_int, 0, 0, ffi::SWP_NOZORDER | ffi::SWP_NOSIZE); ffi::UpdateWindow(self.window); } } /// See the docs in the crate root file. pub fn get_inner_size(&self) -> Option<(uint, uint)> { use std::mem; let mut rect: ffi::RECT = unsafe { mem::uninitialized() }; if unsafe { ffi::GetClientRect(self.window, &mut rect) } == 0 { return None } Some(( (rect.right - rect.left) as uint, (rect.bottom - rect.top) as uint )) } /// See the docs in the crate root file. pub fn get_outer_size(&self) -> Option<(uint, uint)> { use std::mem; let mut rect: ffi::RECT = unsafe { mem::uninitialized() }; if unsafe { ffi::GetWindowRect(self.window, &mut rect) } == 0 { return None } Some(( (rect.right - rect.left) as uint, (rect.bottom - rect.top) as uint )) } /// See the docs in the crate root file. pub fn set_inner_size(&self, x: uint, y: uint) { use libc; unsafe { ffi::SetWindowPos(self.window, ptr::null(), 0, 0, x as libc::c_int, y as libc::c_int, ffi::SWP_NOZORDER | ffi::SWP_NOREPOSITION); ffi::UpdateWindow(self.window); } } /// See the docs in the crate root file. // TODO: return iterator pub fn poll_events(&self) -> Vec { let mut events = Vec::new(); loop { match self.events_receiver.try_recv() { Ok(ev) => events.push(ev), Err(_) => break } } // if one of the received events is `Closed`, setting `is_closed` to true if events.iter().find(|e| match e { &&::Closed => true, _ => false }).is_some() { use std::sync::atomic::Relaxed; self.is_closed.store(true, Relaxed); } events } /// See the docs in the crate root file. // TODO: return iterator pub fn wait_events(&self) -> Vec { match self.events_receiver.recv_opt() { Ok(ev) => { // if the received event is `Closed`, setting `is_closed` to true match ev { ::Closed => { use std::sync::atomic::Relaxed; self.is_closed.store(true, Relaxed); }, _ => () }; // looing for other possible events in the queue let mut result = self.poll_events(); result.insert(0, ev); result }, Err(_) => { use std::sync::atomic::Relaxed; self.is_closed.store(true, Relaxed); vec![] } } } /// See the docs in the crate root file. pub unsafe fn make_current(&self) { // TODO: check return value ffi::wgl::MakeCurrent(self.hdc, self.context); } /// See the docs in the crate root file. pub fn get_proc_address(&self, addr: &str) -> *const () { use std::c_str::ToCStr; unsafe { addr.with_c_str(|s| { let p = ffi::wgl::GetProcAddress(s) as *const (); if !p.is_null() { return p; } ffi::GetProcAddress(self.gl_library, s) as *const () }) } } /// See the docs in the crate root file. pub fn swap_buffers(&self) { unsafe { // calling glFlush is necessary on Windows 8 ffi::glFlush(); ffi::SwapBuffers(self.hdc); } } } #[unsafe_destructor] impl Drop for Window { fn drop(&mut self) { use std::ptr; unsafe { ffi::PostMessageW(self.window, ffi::WM_DESTROY, 0, 0); } unsafe { ffi::wgl::MakeCurrent(ptr::null(), ptr::null()); } unsafe { ffi::wgl::DeleteContext(self.context); } unsafe { ffi::DestroyWindow(self.window); } } }