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authorPierre Krieger <pierre.krieger1708@gmail.com>2015-02-16 11:46:18 +0100
committerPierre Krieger <pierre.krieger1708@gmail.com>2015-02-16 13:58:48 +0100
commit353567b216faf83a839d78ea9504459d47b1c5db (patch)
treeb587803d4386603d38116edfb192cb4267ac5197
parent40591806dc7382ddb75d90f2289127f5f28f9825 (diff)
downloadglutin-353567b216faf83a839d78ea9504459d47b1c5db.tar.gz
glutin-353567b216faf83a839d78ea9504459d47b1c5db.zip
Start splitting win32::init into multiple functions
-rw-r--r--src/win32/init.rs665
1 files changed, 338 insertions, 327 deletions
diff --git a/src/win32/init.rs b/src/win32/init.rs
index c3352b6..c0d193a 100644
--- a/src/win32/init.rs
+++ b/src/win32/init.rs
@@ -1,7 +1,10 @@
use std::sync::atomic::AtomicBool;
use std::ptr;
+use std::mem;
+use std::os;
use super::callback;
use super::Window;
+use super::MonitorID;
use BuilderAttribs;
use CreationError;
use CreationError::OsError;
@@ -23,9 +26,6 @@ unsafe impl Send for ContextHack {}
pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>)
-> Result<Window, CreationError>
{
- use std::mem;
- use std::os;
-
// 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
@@ -36,382 +36,393 @@ pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<C
// 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 || {
- let builder_sharelists = builder_sharelists.map(|s| s.0);
-
- // registering the window class
- let class_name = {
- let class_name: Vec<u16> = "Window Class".utf16_units().chain(Some(0).into_iter())
- .collect::<Vec<u16>>();
-
- let class = winapi::WNDCLASSEXW {
- cbSize: mem::size_of::<winapi::WNDCLASSEXW>() as winapi::UINT,
- style: winapi::CS_HREDRAW | winapi::CS_VREDRAW | winapi::CS_OWNDC,
- lpfnWndProc: callback::callback,
- cbClsExtra: 0,
- cbWndExtra: 0,
- hInstance: unsafe { kernel32::GetModuleHandleW(ptr::null()) },
- hIcon: ptr::null_mut(),
- hCursor: ptr::null_mut(),
- 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.
- unsafe { user32::RegisterClassExW(&class) };
-
- class_name
- };
-
- // 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();
-
- // 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 = unsafe { 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()) };
-
- if result != winapi::DISP_CHANGE_SUCCESSFUL {
- tx.send(Err(OsError(format!("ChangeDisplaySettings failed: {}", result))));
+ // sending
+ match init(title, builder, builder_sharelists) {
+ Ok(w) => tx.send(Ok(w)).ok(),
+ Err(e) => {
+ tx.send(Err(e)).ok();
return;
}
- }
-
- // 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
- unsafe { user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style) };
-
- // getting the address of wglCreateContextAttribsARB and the pixel format
- // that we will use
- let (extra_functions, pixel_format) = {
- // creating a dummy invisible window for GL initialization
- let dummy_window = unsafe {
- 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() {
- use std::os;
- tx.send(Err(OsError(format!("CreateWindowEx function failed: {}",
- os::error_string(os::errno() as usize)))));
- return;
- }
-
- handle
- };
-
- // getting the HDC of the dummy window
- let dummy_hdc = {
- let hdc = unsafe { user32::GetDC(dummy_window) };
- if hdc.is_null() {
- tx.send(Err(OsError(format!("GetDC function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(dummy_window); }
- return;
- }
- hdc
- };
-
- // getting the pixel format that we will use
- let pixel_format = {
- // initializing a PIXELFORMATDESCRIPTOR that indicates what we want
- let mut output: winapi::PIXELFORMATDESCRIPTOR = unsafe { mem::zeroed() };
- output.nSize = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as winapi::WORD;
- output.nVersion = 1;
- output.dwFlags = winapi::PFD_DRAW_TO_WINDOW | winapi::PFD_DOUBLEBUFFER |
- winapi::PFD_SUPPORT_OPENGL | winapi::PFD_GENERIC_ACCELERATED;
- output.iPixelType = winapi::PFD_TYPE_RGBA;
- output.cColorBits = 24;
- output.cAlphaBits = 8;
- output.cAccumBits = 0;
- output.cDepthBits = 24;
- output.cStencilBits = 8;
- output.cAuxBuffers = 0;
- output.iLayerType = winapi::PFD_MAIN_PLANE;
-
- let pf_index = unsafe { gdi32::ChoosePixelFormat(dummy_hdc, &output) };
-
- if pf_index == 0 {
- tx.send(Err(OsError(format!("ChoosePixelFormat function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(dummy_window); }
- return;
- }
-
- if unsafe { gdi32::DescribePixelFormat(dummy_hdc, pf_index,
- mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as winapi::UINT, &mut output) } == 0
- {
- tx.send(Err(OsError(format!("DescribePixelFormat function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(dummy_window); }
- return;
- }
-
- output
- };
-
- // calling SetPixelFormat
- unsafe {
- if gdi32::SetPixelFormat(dummy_hdc, 1, &pixel_format) == 0 {
- tx.send(Err(OsError(format!("SetPixelFormat function failed: {}",
- os::error_string(os::errno() as usize)))));
- user32::DestroyWindow(dummy_window);
- return;
- }
- }
-
- // creating the dummy OpenGL context
- let dummy_context = {
- let ctxt = unsafe { gl::wgl::CreateContext(dummy_hdc as *const libc::c_void) };
- if ctxt.is_null() {
- tx.send(Err(OsError(format!("wglCreateContext function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(dummy_window); }
- return;
- }
- ctxt
- };
-
- // making context current
- unsafe { gl::wgl::MakeCurrent(dummy_hdc as *const libc::c_void, dummy_context); }
-
- // loading the extra WGL functions
- let extra_functions = gl::wgl_extra::Wgl::load_with(|addr| {
- use libc;
-
- let addr = CString::from_slice(addr.as_bytes());
- let addr = addr.as_slice_with_nul().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); }
- unsafe { user32::DestroyWindow(dummy_window); }
+ // 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() };
- // returning the address
- (extra_functions, pixel_format)
- };
+ if unsafe { user32::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) } == 0 {
+ break;
+ }
- // creating the real window this time
- let real_window = unsafe {
- 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)
- };
+ unsafe { user32::TranslateMessage(&msg) };
+ unsafe { user32::DispatchMessageW(&msg) }; // calls `callback` (see below)
+ }
+ });
- let style = if !builder.visible || builder.headless {
- style
- } else {
- style | winapi::WS_VISIBLE
- };
+ rx.recv().unwrap()
+}
+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();
+ 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
+ unsafe { user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style) };
+
+ // getting the address of wglCreateContextAttribsARB and the pixel format
+ // that we will use
+ let (extra_functions, pixel_format) = {
+ // creating a dummy invisible window for GL initialization
+ let dummy_window = unsafe {
let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
title.as_ptr() as winapi::LPCWSTR,
style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
- if builder.monitor.is_some() { 0 } else { winapi::CW_USEDEFAULT },
- if builder.monitor.is_some() { 0 } else { winapi::CW_USEDEFAULT },
- width.unwrap_or(winapi::CW_USEDEFAULT), height.unwrap_or(winapi::CW_USEDEFAULT),
+ 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() {
- use std::os;
- tx.send(Err(OsError(format!("CreateWindowEx function failed: {}",
- os::error_string(os::errno() as usize)))));
- return;
+ return Err(OsError(format!("CreateWindowEx function failed: {}",
+ os::error_string(os::errno() as usize))));
}
handle
};
- // getting the HDC of the window
- let hdc = {
- let hdc = unsafe { user32::GetDC(real_window) };
+ // getting the HDC of the dummy window
+ let dummy_hdc = {
+ let hdc = unsafe { user32::GetDC(dummy_window) };
if hdc.is_null() {
- tx.send(Err(OsError(format!("GetDC function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(real_window); }
- return;
+ let err = Err(OsError(format!("GetDC function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(dummy_window); }
+ return err;
}
hdc
};
+ // getting the pixel format that we will use
+ let pixel_format = {
+ // initializing a PIXELFORMATDESCRIPTOR that indicates what we want
+ let mut output: winapi::PIXELFORMATDESCRIPTOR = unsafe { mem::zeroed() };
+ output.nSize = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as winapi::WORD;
+ output.nVersion = 1;
+ output.dwFlags = winapi::PFD_DRAW_TO_WINDOW | winapi::PFD_DOUBLEBUFFER |
+ winapi::PFD_SUPPORT_OPENGL | winapi::PFD_GENERIC_ACCELERATED;
+ output.iPixelType = winapi::PFD_TYPE_RGBA;
+ output.cColorBits = 24;
+ output.cAlphaBits = 8;
+ output.cAccumBits = 0;
+ output.cDepthBits = 24;
+ output.cStencilBits = 8;
+ output.cAuxBuffers = 0;
+ output.iLayerType = winapi::PFD_MAIN_PLANE;
+
+ let pf_index = unsafe { gdi32::ChoosePixelFormat(dummy_hdc, &output) };
+
+ if pf_index == 0 {
+ let err = Err(OsError(format!("ChoosePixelFormat function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(dummy_window); }
+ return err;
+ }
+
+ if unsafe { gdi32::DescribePixelFormat(dummy_hdc, pf_index,
+ mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as winapi::UINT, &mut output) } == 0
+ {
+ let err = Err(OsError(format!("DescribePixelFormat function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(dummy_window); }
+ return err;
+ }
+
+ output
+ };
+
// calling SetPixelFormat
unsafe {
- if gdi32::SetPixelFormat(hdc, 1, &pixel_format) == 0 {
- tx.send(Err(OsError(format!("SetPixelFormat function failed: {}",
- os::error_string(os::errno() as usize)))));
- user32::DestroyWindow(real_window);
- return;
+ if gdi32::SetPixelFormat(dummy_hdc, 1, &pixel_format) == 0 {
+ let err = Err(OsError(format!("SetPixelFormat function failed: {}",
+ os::error_string(os::errno() as usize))));
+ user32::DestroyWindow(dummy_window);
+ return err;
}
}
- // creating the OpenGL context
- let context = {
- use libc;
+ // creating the dummy OpenGL context
+ let dummy_context = {
+ let ctxt = unsafe { gl::wgl::CreateContext(dummy_hdc as *const libc::c_void) };
+ if ctxt.is_null() {
+ let err = Err(OsError(format!("wglCreateContext function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(dummy_window); }
+ return err;
+ }
+ ctxt
+ };
- let mut attributes = Vec::new();
+ // making context current
+ unsafe { gl::wgl::MakeCurrent(dummy_hdc as *const libc::c_void, dummy_context); }
- if builder.gl_version.is_some() {
- let version = builder.gl_version.as_ref().unwrap();
- attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
- attributes.push(version.0 as libc::c_int);
- attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
- attributes.push(version.1 as libc::c_int);
- }
+ // loading the extra WGL functions
+ let extra_functions = gl::wgl_extra::Wgl::load_with(|addr| {
+ use libc;
+
+ let addr = CString::from_slice(addr.as_bytes());
+ let addr = addr.as_slice_with_nul().as_ptr();
- 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);
+ unsafe {
+ gl::wgl::GetProcAddress(addr) as *const libc::c_void
}
+ });
- attributes.push(0);
+ // removing current context
+ unsafe { gl::wgl::MakeCurrent(ptr::null(), ptr::null()); }
- let ctxt = unsafe {
- if extra_functions.CreateContextAttribsARB.is_loaded() {
- let share = if let Some(c) = builder_sharelists { c } else { ptr::null_mut() };
- extra_functions.CreateContextAttribsARB(hdc as *const libc::c_void,
- share as *const libc::c_void,
- attributes.as_slice().as_ptr())
+ // destroying the context and the window
+ unsafe { gl::wgl::DeleteContext(dummy_context); }
+ unsafe { user32::DestroyWindow(dummy_window); }
- } else {
- let ctxt = gl::wgl::CreateContext(hdc as *const libc::c_void);
- if let Some(c) = builder_sharelists {
- gl::wgl::ShareLists(c as *const libc::c_void, ctxt);
- };
- ctxt
- }
- };
+ // returning the address
+ (extra_functions, pixel_format)
+ };
- if ctxt.is_null() {
- tx.send(Err(OsError(format!("OpenGL context creation failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { user32::DestroyWindow(real_window); }
- return;
- }
+ // creating the real window this time
+ let real_window = unsafe {
+ 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)
+ };
- ctxt
+ let style = if !builder.visible || builder.headless {
+ style
+ } else {
+ style | winapi::WS_VISIBLE
};
- // calling SetForegroundWindow if fullscreen
- if builder.monitor.is_some() {
- unsafe { user32::SetForegroundWindow(real_window) };
+ let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
+ title.as_ptr() as winapi::LPCWSTR,
+ style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
+ if builder.monitor.is_some() { 0 } else { winapi::CW_USEDEFAULT },
+ if builder.monitor.is_some() { 0 } else { 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: {}",
+ os::error_string(os::errno() as usize))));
}
- // filling the WINDOW task-local storage
- 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()));
- });
- rx
- };
+ handle
+ };
+
+ // getting the HDC of the window
+ let hdc = {
+ let hdc = unsafe { user32::GetDC(real_window) };
+ if hdc.is_null() {
+ let err = Err(OsError(format!("GetDC function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(real_window); }
+ return err;
+ }
+ hdc
+ };
+
+ // calling SetPixelFormat
+ unsafe {
+ if gdi32::SetPixelFormat(hdc, 1, &pixel_format) == 0 {
+ let err = Err(OsError(format!("SetPixelFormat function failed: {}",
+ os::error_string(os::errno() as usize))));
+ user32::DestroyWindow(real_window);
+ return err;
+ }
+ }
- // loading the opengl32 module
- let gl_library = {
- let name = "opengl32.dll".utf16_units().chain(Some(0).into_iter())
- .collect::<Vec<u16>>().as_ptr();
- let lib = unsafe { kernel32::LoadLibraryW(name) };
- if lib.is_null() {
- tx.send(Err(OsError(format!("LoadLibrary function failed: {}",
- os::error_string(os::errno() as usize)))));
- unsafe { gl::wgl::DeleteContext(context); }
- unsafe { user32::DestroyWindow(real_window); }
- return;
- }
- lib
- };
+ // creating the OpenGL context
+ let context = {
+ use libc;
- // handling vsync
- if builder.vsync {
- if extra_functions.SwapIntervalEXT.is_loaded() {
- unsafe { gl::wgl::MakeCurrent(hdc as *const libc::c_void, context) };
- if unsafe { extra_functions.SwapIntervalEXT(1) } == 0 {
- tx.send(Err(OsError(format!("wglSwapIntervalEXT failed"))));
- unsafe { gl::wgl::DeleteContext(context); }
- unsafe { user32::DestroyWindow(real_window); }
- return;
- }
-
- // it is important to remove the current context, otherwise you get very weird
- // errors
- unsafe { gl::wgl::MakeCurrent(ptr::null(), ptr::null()); }
- }
+ let mut attributes = Vec::new();
+
+ if builder.gl_version.is_some() {
+ let version = builder.gl_version.as_ref().unwrap();
+ attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
+ attributes.push(version.0 as libc::c_int);
+ attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
+ attributes.push(version.1 as libc::c_int);
}
- // building the struct
- let window = Window{
- window: real_window,
- hdc: hdc as winapi::HDC,
- context: context as winapi::HGLRC,
- gl_library: gl_library,
- events_receiver: events_receiver,
- is_closed: AtomicBool::new(false),
- };
+ 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);
+ }
- // sending
- tx.send(Ok(window));
+ attributes.push(0);
- // 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 ctxt = unsafe {
+ if extra_functions.CreateContextAttribsARB.is_loaded() {
+ let share = if let Some(c) = builder_sharelists { c } else { ptr::null_mut() };
+ extra_functions.CreateContextAttribsARB(hdc as *const libc::c_void,
+ share as *const libc::c_void,
+ attributes.as_slice().as_ptr())
- if unsafe { user32::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) } == 0 {
- break;
+ } else {
+ let ctxt = gl::wgl::CreateContext(hdc as *const libc::c_void);
+ if let Some(c) = builder_sharelists {
+ gl::wgl::ShareLists(c as *const libc::c_void, ctxt);
+ };
+ ctxt
}
+ };
- unsafe { user32::TranslateMessage(&msg) };
- unsafe { user32::DispatchMessageW(&msg) }; // calls `callback` (see below)
+ if ctxt.is_null() {
+ let err = Err(OsError(format!("OpenGL context creation failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { user32::DestroyWindow(real_window); }
+ return err;
}
- });
- rx.recv().unwrap()
+ ctxt
+ };
+
+ // calling SetForegroundWindow if fullscreen
+ if builder.monitor.is_some() {
+ unsafe { user32::SetForegroundWindow(real_window) };
+ }
+
+ // filling the WINDOW task-local storage
+ 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()));
+ });
+ rx
+ };
+
+ // loading the opengl32 module
+ let gl_library = {
+ let name = "opengl32.dll".utf16_units().chain(Some(0).into_iter())
+ .collect::<Vec<u16>>().as_ptr();
+ let lib = unsafe { kernel32::LoadLibraryW(name) };
+ if lib.is_null() {
+ let err = Err(OsError(format!("LoadLibrary function failed: {}",
+ os::error_string(os::errno() as usize))));
+ unsafe { gl::wgl::DeleteContext(context); }
+ unsafe { user32::DestroyWindow(real_window); }
+ return err;
+ }
+ lib
+ };
+
+ // handling vsync
+ if builder.vsync {
+ if extra_functions.SwapIntervalEXT.is_loaded() {
+ unsafe { gl::wgl::MakeCurrent(hdc as *const libc::c_void, context) };
+ if unsafe { extra_functions.SwapIntervalEXT(1) } == 0 {
+ unsafe { gl::wgl::DeleteContext(context); }
+ unsafe { user32::DestroyWindow(real_window); }
+ 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 as winapi::HGLRC,
+ gl_library: gl_library,
+ events_receiver: events_receiver,
+ is_closed: AtomicBool::new(false),
+ })
+}
+
+fn register_window_class() -> Vec<u16> {
+ let class_name: Vec<u16> = "Window Class".utf16_units().chain(Some(0).into_iter())
+ .collect::<Vec<u16>>();
+
+ let class = winapi::WNDCLASSEXW {
+ cbSize: mem::size_of::<winapi::WNDCLASSEXW>() as winapi::UINT,
+ style: winapi::CS_HREDRAW | winapi::CS_VREDRAW | winapi::CS_OWNDC,
+ lpfnWndProc: callback::callback,
+ cbClsExtra: 0,
+ cbWndExtra: 0,
+ hInstance: unsafe { kernel32::GetModuleHandleW(ptr::null()) },
+ hIcon: ptr::null_mut(),
+ hCursor: ptr::null_mut(),
+ 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.
+ unsafe { user32::RegisterClassExW(&class) };
+
+ class_name
+}
+
+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 = unsafe { 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()) };
+
+ if result != winapi::DISP_CHANGE_SUCCESSFUL {
+ return Err(OsError(format!("ChangeDisplaySettings failed: {}", result)));
+ }
+
+ Ok(())
}