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-rw-r--r--src/win32/init.rs40
-rw-r--r--src/win32/mod.rs29
-rw-r--r--src/win32/monitor.rs59
3 files changed, 103 insertions, 25 deletions
diff --git a/src/win32/init.rs b/src/win32/init.rs
index 383e3f4..8987d2e 100644
--- a/src/win32/init.rs
+++ b/src/win32/init.rs
@@ -8,8 +8,10 @@ use super::{event, ffi};
use super::{MonitorID, Window};
use {Event, Hints};
-/// Stores the list of all the windows.
-/// Only available on callback thread.
+/// Stores the current window and its events dispatcher.
+///
+/// We only have one window per thread. We still store the HWND in case where we
+/// receive an event for another window.
local_data_key!(WINDOW: (ffi::HWND, Sender<Event>))
pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
@@ -19,11 +21,14 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
use std::mem;
use std::os;
- let title = title.to_string();
+ // initializing variables to be sent to the task
+ let title = title.utf16_units().collect::<Vec<u16>>().append_one(0); // title to utf16
//let hints = hints.clone();
-
let (tx, rx) = channel();
+ // 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.
TaskBuilder::new().native().spawn(proc() {
// registering the window class
let class_name: Vec<u16> = "Window Class".utf16_units().collect::<Vec<u16>>()
@@ -57,7 +62,9 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
top: 0, bottom: dimensions.map(|(_, h)| h as ffi::LONG).unwrap_or(768),
};
- // switching to fullscreen
+ // 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 monitor.is_some() {
let monitor = monitor.as_ref().unwrap();
@@ -86,7 +93,7 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
}
}
- // computing the style and extended style
+ // computing the style and extended style of the window
let (ex_style, style) = if monitor.is_some() {
(ffi::WS_EX_APPWINDOW, ffi::WS_POPUP | ffi::WS_CLIPSIBLINGS | ffi::WS_CLIPCHILDREN)
} else {
@@ -94,13 +101,13 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
ffi::WS_OVERLAPPEDWINDOW | ffi::WS_CLIPSIBLINGS | ffi::WS_CLIPCHILDREN)
};
- // adjusting
+ // adjusting the window coordinates using the style
unsafe { ffi::AdjustWindowRectEx(&mut rect, style, 0, ex_style) };
// creating the window
let handle = unsafe {
let handle = ffi::CreateWindowExW(ex_style, class_name.as_ptr(),
- title.as_slice().utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr() as ffi::LPCWSTR,
+ title.as_ptr() as ffi::LPCWSTR,
style | ffi::WS_VISIBLE | ffi::WS_CLIPSIBLINGS | ffi::WS_CLIPCHILDREN,
if monitor.is_some() { 0 } else { ffi::CW_USEDEFAULT},
if monitor.is_some() { 0 } else { ffi::CW_USEDEFAULT},
@@ -123,7 +130,7 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
unsafe { ffi::SetForegroundWindow(handle) };
}
- // adding it to WINDOWS_LIST
+ // filling the WINDOW task-local storage
let events_receiver = {
let (tx, rx) = channel();
WINDOW.replace(Some((handle, tx)));
@@ -166,7 +173,7 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
}
}
- // creating the context
+ // creating the OpenGL context
let context = {
let ctxt = unsafe { ffi::wglCreateContext(hdc) };
if ctxt.is_null() {
@@ -177,7 +184,7 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
ctxt
};
- // loading opengl32
+ // loading the opengl32 module
let gl_library = {
let name = "opengl32.dll".utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr();
let lib = unsafe { ffi::LoadLibraryW(name) };
@@ -199,22 +206,24 @@ pub fn new_window(dimensions: Option<(uint, uint)>, title: &str,
is_closed: AtomicBool::new(false),
}));
- // starting the events loop
+ // 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() };
if unsafe { ffi::GetMessageW(&mut msg, ptr::mut_null(), 0, 0) } == 0 {
- break
+ break;
}
unsafe { ffi::TranslateMessage(&msg) };
- unsafe { ffi::DispatchMessageW(&msg) };
+ unsafe { ffi::DispatchMessageW(&msg) }; // calls `callback` (see below)
}
});
rx.recv()
}
+/// Checks that the window is the good one, and if so send the event to it.
fn send_event(window: ffi::HWND, event: Event) {
let stored = match WINDOW.get() {
None => return,
@@ -230,6 +239,9 @@ fn send_event(window: ffi::HWND, event: Event) {
sender.send_opt(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.
extern "stdcall" fn callback(window: ffi::HWND, msg: ffi::UINT,
wparam: ffi::WPARAM, lparam: ffi::LPARAM) -> ffi::LRESULT
{
diff --git a/src/win32/mod.rs b/src/win32/mod.rs
index 9d8723d..7558245 100644
--- a/src/win32/mod.rs
+++ b/src/win32/mod.rs
@@ -9,16 +9,32 @@ mod ffi;
mod init;
mod monitor;
+/// 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<Event>,
+
+ /// True if a `Closed` event has been received.
is_closed: AtomicBool,
}
impl Window {
+ /// See the docs if the crate root file.
pub fn new(dimensions: Option<(uint, uint)>, title: &str,
hints: &Hints, monitor: Option<MonitorID>)
-> Result<Window, String>
@@ -26,11 +42,14 @@ impl Window {
init::new_window(dimensions, title, hints, monitor)
}
+ /// See the docs if the crate root file.
pub fn is_closed(&self) -> bool {
use std::sync::atomics::Relaxed;
self.is_closed.load(Relaxed)
}
+ /// See the docs if the crate root file.
+ ///
/// Calls SetWindowText on the HWND.
pub fn set_title(&self, text: &str) {
unsafe {
@@ -39,6 +58,7 @@ impl Window {
}
}
+ /// See the docs if the crate root file.
pub fn get_position(&self) -> Option<(int, int)> {
use std::mem;
@@ -53,6 +73,7 @@ impl Window {
Some((rect.left as int, rect.top as int))
}
+ /// See the docs if the crate root file.
pub fn set_position(&self, x: uint, y: uint) {
use libc;
@@ -63,6 +84,7 @@ impl Window {
}
}
+ /// See the docs if the crate root file.
pub fn get_inner_size(&self) -> Option<(uint, uint)> {
use std::mem;
let mut rect: ffi::RECT = unsafe { mem::uninitialized() };
@@ -77,6 +99,7 @@ impl Window {
))
}
+ /// See the docs if the crate root file.
pub fn get_outer_size(&self) -> Option<(uint, uint)> {
use std::mem;
let mut rect: ffi::RECT = unsafe { mem::uninitialized() };
@@ -91,6 +114,7 @@ impl Window {
))
}
+ /// See the docs if the crate root file.
pub fn set_inner_size(&self, x: uint, y: uint) {
use libc;
@@ -101,6 +125,7 @@ impl Window {
}
}
+ /// See the docs if the crate root file.
// TODO: return iterator
pub fn poll_events(&self) -> Vec<Event> {
let mut events = Vec::new();
@@ -119,6 +144,7 @@ impl Window {
events
}
+ /// See the docs if the crate root file.
// TODO: return iterator
pub fn wait_events(&self) -> Vec<Event> {
match self.events_receiver.recv_opt() {
@@ -135,10 +161,12 @@ impl Window {
}
}
+ /// See the docs if the crate root file.
pub unsafe fn make_current(&self) {
ffi::wglMakeCurrent(self.hdc, self.context)
}
+ /// See the docs if the crate root file.
pub fn get_proc_address(&self, addr: &str) -> *const () {
use std::c_str::ToCStr;
@@ -151,6 +179,7 @@ impl Window {
}
}
+ /// See the docs if the crate root file.
pub fn swap_buffers(&self) {
unsafe {
ffi::SwapBuffers(self.hdc);
diff --git a/src/win32/monitor.rs b/src/win32/monitor.rs
index d53577e..b8f5008 100644
--- a/src/win32/monitor.rs
+++ b/src/win32/monitor.rs
@@ -1,34 +1,61 @@
use super::ffi;
+/// Win32 implementation of the main `MonitorID` object.
pub struct MonitorID {
+ /// The system name of the monitor.
name: [ffi::WCHAR, ..32],
+
+ /// 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: ffi::DWORD,
+
+ /// The position of the monitor in pixels on the desktop.
+ ///
+ /// A window that is positionned at these coordinates will overlap the monitor.
position: (uint, uint),
}
+/// Win32 implementation of the main `get_available_monitors` function.
pub fn get_available_monitors() -> Vec<MonitorID> {
use std::{iter, mem, ptr};
+ // return value
let mut result = Vec::new();
+ // enumerating the devices is done by querying device 0, then device 1, then device 2, etc.
+ // until the query function returns null
for id in iter::count(0u, 1) {
- let mut output: ffi::DISPLAY_DEVICEW = unsafe { mem::zeroed() };
- output.cb = mem::size_of::<ffi::DISPLAY_DEVICEW>() as ffi::DWORD;
+ // getting the DISPLAY_DEVICEW object of the current device
+ let output = {
+ let mut output: ffi::DISPLAY_DEVICEW = unsafe { mem::zeroed() };
+ output.cb = mem::size_of::<ffi::DISPLAY_DEVICEW>() as ffi::DWORD;
- if unsafe { ffi::EnumDisplayDevicesW(ptr::null(), id as ffi::DWORD, &mut output, 0) } == 0 {
- break
- }
+ if unsafe { ffi::EnumDisplayDevicesW(ptr::null(),
+ id as ffi::DWORD, &mut output, 0) } == 0
+ {
+ // the device doesn't exist, which means we have finished enumerating
+ break;
+ }
- if (output.StateFlags & ffi::DISPLAY_DEVICE_ACTIVE) == 0 ||
- (output.StateFlags & ffi::DISPLAY_DEVICE_MIRRORING_DRIVER) != 0
- {
- continue
- }
+ if (output.StateFlags & ffi::DISPLAY_DEVICE_ACTIVE) == 0 ||
+ (output.StateFlags & ffi::DISPLAY_DEVICE_MIRRORING_DRIVER) != 0
+ {
+ // the device is not active
+ // the Win32 api usually returns a lot of inactive devices
+ continue;
+ }
+
+ output
+ };
+ // computing the human-friendly name
let readable_name = String::from_utf16_lossy(output.DeviceString.as_slice());
let readable_name = readable_name.as_slice().trim_right_chars(0 as char).to_string();
+ // getting the position
let position = unsafe {
let mut dev: ffi::DEVMODE = mem::zeroed();
dev.dmSize = mem::size_of::<ffi::DEVMODE>() as ffi::WORD;
@@ -36,13 +63,14 @@ pub fn get_available_monitors() -> Vec<MonitorID> {
if ffi::EnumDisplaySettingsExW(output.DeviceName.as_ptr(), ffi::ENUM_CURRENT_SETTINGS,
&mut dev, 0) == 0
{
- continue
+ continue;
}
let point: &ffi::POINTL = mem::transmute(&dev.union1);
(point.x as uint, point.y as uint)
};
+ // adding to the resulting list
result.push(MonitorID {
name: output.DeviceName,
readable_name: readable_name,
@@ -54,7 +82,11 @@ pub fn get_available_monitors() -> Vec<MonitorID> {
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().move_iter() {
if (monitor.flags & ffi::DISPLAY_DEVICE_PRIMARY_DEVICE) != 0 {
return monitor
@@ -65,14 +97,19 @@ pub fn get_primary_monitor() -> MonitorID {
}
impl MonitorID {
+ /// See the docs if the crate root file.
pub fn get_name(&self) -> Option<String> {
Some(self.readable_name.clone())
}
+ /// This is a Win32-only function for `MonitorID` that returns the system name of the device.
pub fn get_system_name(&self) -> &[ffi::WCHAR] {
self.name.as_slice()
}
+ /// 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) -> (uint, uint) {
self.position
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-11-04 05:12:05 +0000