diff options
Diffstat (limited to 'src/win32/init.rs')
| -rw-r--r-- | src/win32/init.rs | 250 |
1 files changed, 113 insertions, 137 deletions
diff --git a/src/win32/init.rs b/src/win32/init.rs index 260b0ab..b458d95 100644 --- a/src/win32/init.rs +++ b/src/win32/init.rs @@ -2,9 +2,14 @@ use std::sync::atomic::AtomicBool; use std::ptr; use std::mem; use std::os; +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; @@ -32,42 +37,43 @@ pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<C { // initializing variables to be sent to the task let title = builder.title.as_slice().utf16_units() - .chain(Some(0).into_iter()).collect::<Vec<u16>>(); // title to utf16 - //let hints = hints.clone(); - let (tx, rx) = channel(); + .chain(Some(0).into_iter()).collect::<Vec<u16>>(); // title to utf16 - // GetMessage must be called in the same thread as CreateWindow, - // so we create a new thread dedicated to this window. - // This is the only safe method. Using `nosend` wouldn't work for non-native runtime. - ::std::thread::Thread::spawn(move || { - // sending - 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 = unsafe { mem::uninitialized() }; + let (tx, rx) = channel(); - if unsafe { user32::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) } == 0 { - break; + // `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) } - - unsafe { user32::TranslateMessage(&msg) }; - unsafe { user32::DispatchMessageW(&msg) }; // calls `callback` (see below) } }); rx.recv().unwrap() } -fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>) - -> Result<Window, CreationError> +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); @@ -85,7 +91,7 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O // and change the monitor's resolution if necessary if builder.monitor.is_some() { let monitor = builder.monitor.as_ref().unwrap(); - switch_to_fullscreen(&mut rect, monitor); + try!(switch_to_fullscreen(&mut rect, monitor)); } // computing the style and extended style of the window @@ -97,12 +103,13 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O }; // adjusting the window coordinates using the style - unsafe { user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style) }; + user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style); - // getting the address of wglCreateContextAttribsARB + // 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 for GL initialization - let dummy_window = unsafe { + // 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, @@ -113,62 +120,44 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O if handle.is_null() { return Err(OsError(format!("CreateWindowEx function failed: {}", - os::error_string(os::errno())))); + os::error_string(os::errno())))); } - handle - }; - - // getting the HDC of the dummy window - let dummy_hdc = { - let hdc = unsafe { user32::GetDC(dummy_window) }; + let hdc = user32::GetDC(handle); if hdc.is_null() { let err = Err(OsError(format!("GetDC function failed: {}", - os::error_string(os::errno())))); - unsafe { user32::DestroyWindow(dummy_window); } + os::error_string(os::errno())))); return err; } - hdc + + WindowWrapper(handle, hdc) }; // getting the pixel format that we will use and setting it { - let formats = enumerate_native_pixel_formats(dummy_hdc); + let formats = enumerate_native_pixel_formats(&dummy_window); let (id, _) = builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a))); - try!(set_pixel_format(dummy_hdc, id)); + try!(set_pixel_format(&dummy_window, id)); } - // creating the dummy OpenGL context - let dummy_context = try!(create_context(None, dummy_hdc, None)); - - // making context current - unsafe { gl::wgl::MakeCurrent(dummy_hdc as *const libc::c_void, dummy_context as *const libc::c_void); } + // 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 - let extra_functions = gl::wgl_extra::Wgl::load_with(|addr| { + gl::wgl_extra::Wgl::load_with(|addr| { use libc; - let addr = CString::from_slice(addr.as_bytes()); + let addr = CString::new(addr.as_bytes()).unwrap(); let addr = addr.as_ptr(); - unsafe { - gl::wgl::GetProcAddress(addr) as *const libc::c_void - } - }); - - // removing current context - unsafe { gl::wgl::MakeCurrent(ptr::null(), ptr::null()); } - - // destroying the context and the window - unsafe { gl::wgl::DeleteContext(dummy_context as *const libc::c_void); } - unsafe { user32::DestroyWindow(dummy_window); } - - // returning the address - extra_functions + gl::wgl::GetProcAddress(addr) as *const libc::c_void + }) }; - // creating the real window this time - let real_window = unsafe { + // 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 { @@ -192,50 +181,45 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O if handle.is_null() { return Err(OsError(format!("CreateWindowEx function failed: {}", - os::error_string(os::errno())))); + os::error_string(os::errno())))); } - handle - }; - - // getting the HDC of the window - let hdc = { - let hdc = unsafe { user32::GetDC(real_window) }; + let hdc = user32::GetDC(handle); if hdc.is_null() { - let err = Err(OsError(format!("GetDC function failed: {}", - os::error_string(os::errno())))); - unsafe { user32::DestroyWindow(real_window); } - return err; + return Err(OsError(format!("GetDC function failed: {}", + os::error_string(os::errno())))); } - hdc + + WindowWrapper(handle, hdc) }; // calling SetPixelFormat { let formats = if extra_functions.GetPixelFormatAttribivARB.is_loaded() { - enumerate_arb_pixel_formats(&extra_functions, hdc) + enumerate_arb_pixel_formats(&extra_functions, &real_window) } else { - enumerate_native_pixel_formats(hdc) + enumerate_native_pixel_formats(&real_window) }; let (id, _) = builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a))); - try!(set_pixel_format(hdc, id)); + try!(set_pixel_format(&real_window, id)); } // creating the OpenGL context - let context = try!(create_context(Some((&extra_functions, &builder)), hdc, builder_sharelists)); + let context = try!(create_context(Some((&extra_functions, &builder)), &real_window, + builder_sharelists)); // calling SetForegroundWindow if fullscreen if builder.monitor.is_some() { - unsafe { user32::SetForegroundWindow(real_window) }; + user32::SetForegroundWindow(real_window.0); } - // filling the WINDOW task-local storage + // filling the WINDOW task-local storage so that we can start receiving events let events_receiver = { let (tx, rx) = channel(); let mut tx = Some(tx); callback::WINDOW.with(|window| { - (*window.borrow_mut()) = Some((real_window, tx.take().unwrap())); + (*window.borrow_mut()) = Some((real_window.0, tx.take().unwrap())); }); rx }; @@ -246,23 +230,17 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O // handling vsync if builder.vsync { if extra_functions.SwapIntervalEXT.is_loaded() { - unsafe { gl::wgl::MakeCurrent(hdc as *const libc::c_void, context as *const libc::c_void) }; - if unsafe { extra_functions.SwapIntervalEXT(1) } == 0 { - unsafe { gl::wgl::DeleteContext(context as *const libc::c_void); } - unsafe { user32::DestroyWindow(real_window); } + let guard = try!(CurrentContextGuard::make_current(&real_window, &context)); + + if extra_functions.SwapIntervalEXT(1) == 0 { return Err(OsError(format!("wglSwapIntervalEXT failed"))); } - - // it is important to remove the current context, otherwise you get very weird - // errors - unsafe { gl::wgl::MakeCurrent(ptr::null(), ptr::null()); } } } // building the struct Ok(Window { window: real_window, - hdc: hdc as winapi::HDC, context: context, gl_library: gl_library, events_receiver: events_receiver, @@ -270,7 +248,7 @@ fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, builder_sharelists: O }) } -fn register_window_class() -> Vec<u16> { +unsafe fn register_window_class() -> Vec<u16> { let class_name: Vec<u16> = "Window Class".utf16_units().chain(Some(0).into_iter()) .collect::<Vec<u16>>(); @@ -280,7 +258,7 @@ fn register_window_class() -> Vec<u16> { lpfnWndProc: Some(callback::callback), cbClsExtra: 0, cbWndExtra: 0, - hInstance: unsafe { kernel32::GetModuleHandleW(ptr::null()) }, + hInstance: kernel32::GetModuleHandleW(ptr::null()), hIcon: ptr::null_mut(), hCursor: ptr::null_mut(), hbrBackground: ptr::null_mut(), @@ -293,12 +271,14 @@ fn register_window_class() -> Vec<u16> { // 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. - unsafe { user32::RegisterClassExW(&class) }; + user32::RegisterClassExW(&class); class_name } -fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID) -> Result<(), CreationError> { +unsafe fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID) + -> Result<(), CreationError> +{ // adjusting the rect { let pos = monitor.get_position(); @@ -309,15 +289,16 @@ fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID) -> Result< } // changing device settings - let mut screen_settings: winapi::DEVMODEW = unsafe { mem::zeroed() }; + 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 = unsafe { user32::ChangeDisplaySettingsExW(monitor.get_system_name().as_ptr(), - &mut screen_settings, ptr::null_mut(), winapi::CDS_FULLSCREEN, ptr::null_mut()) }; + let result = user32::ChangeDisplaySettingsExW(monitor.get_system_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))); @@ -326,9 +307,9 @@ fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID) -> Result< Ok(()) } -fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)>, - hdc: winapi::HDC, share: Option<winapi::HGLRC>) - -> Result<winapi::HGLRC, CreationError> +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()); @@ -360,11 +341,10 @@ fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)> attributes.push(0); - Some(unsafe { - extra_functions.CreateContextAttribsARB(hdc as *const libc::c_void, - share as *const libc::c_void, - attributes.as_slice().as_ptr()) - }) + Some(extra_functions.CreateContextAttribsARB(hdc.1 as *const libc::c_void, + share as *const libc::c_void, + attributes.as_slice().as_ptr())) + } else { None } @@ -375,13 +355,11 @@ fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)> let ctxt = match ctxt { Some(ctxt) => ctxt, None => { - unsafe { - let ctxt = gl::wgl::CreateContext(hdc as *const libc::c_void); - if !ctxt.is_null() && !share.is_null() { - gl::wgl::ShareLists(share as *const libc::c_void, ctxt); - }; - ctxt - } + 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 } }; @@ -390,21 +368,19 @@ fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)> os::error_string(os::errno())))); } - Ok(ctxt as winapi::HGLRC) + Ok(ContextWrapper(ctxt as winapi::HGLRC)) } -fn enumerate_native_pixel_formats(hdc: winapi::HDC) -> Vec<(PixelFormat, libc::c_int)> { +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 = unsafe { gdi32::DescribePixelFormat(hdc, 1, size_of_pxfmtdescr, ptr::null_mut()) }; + 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 = unsafe { mem::zeroed() }; + let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed(); - if unsafe { gdi32::DescribePixelFormat(hdc, index, size_of_pxfmtdescr, - &mut output) } == 0 - { + if gdi32::DescribePixelFormat(hdc.1, index, size_of_pxfmtdescr, &mut output) == 0 { continue; } @@ -438,14 +414,14 @@ fn enumerate_native_pixel_formats(hdc: winapi::HDC) -> Vec<(PixelFormat, libc::c result } -fn enumerate_arb_pixel_formats(extra: &gl::wgl_extra::Wgl, hdc: winapi::HDC) - -> Vec<(PixelFormat, libc::c_int)> +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 = unsafe { mem::uninitialized() }; - unsafe { extra.GetPixelFormatAttribivARB(hdc as *const libc::c_void, index as libc::c_int, - 0, 1, [attrib as libc::c_int].as_ptr(), - &mut value) }; + 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 }; @@ -489,17 +465,17 @@ fn enumerate_arb_pixel_formats(extra: &gl::wgl_extra::Wgl, hdc: winapi::HDC) result } -fn set_pixel_format(hdc: winapi::HDC, id: libc::c_int) -> Result<(), CreationError> { - let mut output: winapi::PIXELFORMATDESCRIPTOR = unsafe { mem::zeroed() }; +unsafe fn set_pixel_format(hdc: &WindowWrapper, id: libc::c_int) -> Result<(), CreationError> { + let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed(); - if unsafe { gdi32::DescribePixelFormat(hdc, id, - mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as winapi::UINT, &mut output) } == 0 + if gdi32::DescribePixelFormat(hdc.1, id, mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() + as winapi::UINT, &mut output) == 0 { return Err(OsError(format!("DescribePixelFormat function failed: {}", os::error_string(os::errno())))); } - if unsafe { gdi32::SetPixelFormat(hdc, id, &output) } == 0 { + if gdi32::SetPixelFormat(hdc.1, id, &output) == 0 { return Err(OsError(format!("SetPixelFormat function failed: {}", os::error_string(os::errno())))); } @@ -507,11 +483,11 @@ fn set_pixel_format(hdc: winapi::HDC, id: libc::c_int) -> Result<(), CreationErr Ok(()) } -fn load_opengl32_dll() -> Result<winapi::HMODULE, CreationError> { +unsafe fn load_opengl32_dll() -> Result<winapi::HMODULE, CreationError> { let name = "opengl32.dll".utf16_units().chain(Some(0).into_iter()) .collect::<Vec<u16>>().as_ptr(); - let lib = unsafe { kernel32::LoadLibraryW(name) }; + let lib = kernel32::LoadLibraryW(name); if lib.is_null() { return Err(OsError(format!("LoadLibrary function failed: {}", |