Add monitor support for win32

examples/fullscreen.rs

@@ -14,8 +14,9 @@ fn main() {
         }
 
         print!("Please write the number of the monitor to use: ");
-        let num = from_str(stdin().read_line().unwrap().as_slice()).unwrap();
-        let monitor = init::get_available_monitors().nth(num).unwrap();
+        let num = from_str(stdin().read_line().unwrap().as_slice().trim())
+            .expect("Plase enter a number");
+        let monitor = init::get_available_monitors().nth(num).expect("Please enter a valid ID");
 
         println!("Using {}", monitor.get_name());
 

src/lib.rs

@@ -258,6 +258,7 @@ pub fn get_primary_monitor() -> MonitorID {
 impl MonitorID {
     /// Returns a human-readable name of the monitor.
     pub fn get_name(&self) -> Option<String> {
-        Some("<Unknown>".to_string())
+        let &MonitorID(ref id) = self;
+        id.get_name()
     }
 }

src/win32/ffi.rs

@@ -1,6 +1,7 @@
 #![allow(dead_code)]
 #![allow(non_snake_case_functions)]
 #![allow(non_camel_case_types)]
+#![allow(uppercase_variables)]
 
 use libc;
 
@@ -135,6 +136,13 @@ pub static DISP_CHANGE_BADFLAGS: LONG = -4;
 pub static DISP_CHANGE_BADPARAM: LONG = -5;
 pub static DISP_CHANGE_BADDUALVIEW: LONG = -6;
 
+// ?
+pub static DISPLAY_DEVICE_ACTIVE: DWORD = 0x00000001;
+pub static DISPLAY_DEVICE_MULTI_DRIVER: DWORD = 0x00000002;
+pub static DISPLAY_DEVICE_PRIMARY_DEVICE: DWORD = 0x00000004;
+pub static DISPLAY_DEVICE_MIRRORING_DRIVER: DWORD = 0x00000008;
+pub static DISPLAY_DEVICE_VGA_COMPATIBLE: DWORD = 0x00000010;
+
 // ?
 pub static DM_ORIENTATION: DWORD = 0x00000001;
 pub static DM_PAPERSIZE: DWORD = 0x00000002;
@@ -167,6 +175,13 @@ pub static DM_PANNINGWIDTH: DWORD = 0x08000000;
 pub static DM_PANNINGHEIGHT: DWORD = 0x10000000;
 pub static DM_DISPLAYFIXEDOUTPUT: DWORD = 0x20000000;
 
+// http://msdn.microsoft.com/en-us/library/windows/desktop/dd162609(v=vs.85).aspx
+pub static EDD_GET_DEVICE_INTERFACE_NAME: DWORD = 0x00000001;
+
+// ?
+pub static ENUM_CURRENT_SETTINGS: DWORD = -1;
+pub static ENUM_REGISTRY_SETTINGS: DWORD = -2;
+
 // http://msdn.microsoft.com/en-us/library/windows/desktop/ms679351(v=vs.85).aspx
 pub static FORMAT_MESSAGE_ALLOCATE_BUFFER: DWORD = 0x00000100;
 pub static FORMAT_MESSAGE_ARGUMENT_ARRAY: DWORD = 0x00002000;
@@ -520,6 +535,13 @@ pub struct PIXELFORMATDESCRIPTOR {
     pub dwDamageMask: DWORD,
 }
 
+// http://msdn.microsoft.com/en-us/library/dd162807(v=vs.85).aspx
+#[repr(C)]
+pub struct POINTL {
+    pub x: LONG,
+    pub y: LONG,
+}
+
 // http://msdn.microsoft.com/en-us/library/windows/desktop/dd183565(v=vs.85).aspx
 #[repr(C)]
 pub struct DEVMODE {
@@ -529,7 +551,7 @@ pub struct DEVMODE {
     pub dmSize: WORD,
     pub dmDriverExtra: WORD,
     pub dmFields: DWORD,
-    union1: [u8, ..16],
+    pub union1: [u8, ..16],
     pub dmColor: libc::c_short,
     pub dmDuplex: libc::c_short,
     pub dmYResolution: libc::c_short,
@@ -563,6 +585,17 @@ pub struct WINDOWPLACEMENT {
     pub rcNormalPosition: RECT,
 }
 
+// http://msdn.microsoft.com/en-us/library/windows/desktop/dd183569(v=vs.85).aspx
+#[repr(C)]
+pub struct DISPLAY_DEVICEW {
+    pub cb: DWORD,
+    pub DeviceName: [WCHAR, ..32],
+    pub DeviceString: [WCHAR, ..128],
+    pub StateFlags: DWORD,
+    pub DeviceID: [WCHAR, ..128],
+    pub DeviceKey: [WCHAR, ..128],
+}
+
 pub type LPMSG = *mut MSG;
 
 #[link(name = "advapi32")]
@@ -590,6 +623,10 @@ extern "system" {
     // http://msdn.microsoft.com/en-us/library/windows/desktop/dd183411(v=vs.85).aspx
     pub fn ChangeDisplaySettingsW(lpDevMode: *mut DEVMODE, dwFlags: DWORD) -> LONG;
 
+    // http://msdn.microsoft.com/en-us/library/windows/desktop/dd183413(v=vs.85).aspx
+    pub fn ChangeDisplaySettingsExW(lpszDeviceName: LPCWSTR, lpDevMode: *mut DEVMODE, hwnd: HWND,
+        dwFlags: DWORD, lParam: LPVOID) -> LONG;
+
     // http://msdn.microsoft.com/en-us/library/windows/desktop/ms632680(v=vs.85).aspx
     pub fn CreateWindowExW(dwExStyle: DWORD, lpClassName: LPCWSTR, lpWindowName: LPCWSTR,
         dwStyle: DWORD, x: libc::c_int, y: libc::c_int, nWidth: libc::c_int, nHeight: libc::c_int,
@@ -611,6 +648,14 @@ extern "system" {
     // http://msdn.microsoft.com/en-us/library/windows/desktop/dd162598(v=vs.85).aspx
     pub fn EndPaint(hWnd: HWND, lpPaint: *const PAINTSTRUCT) -> BOOL;
 
+    // http://msdn.microsoft.com/en-us/library/windows/desktop/dd162609(v=vs.85).aspx
+    pub fn EnumDisplayDevicesW(lpDevice: LPCWSTR, iDevNum: DWORD,
+        lpDisplayDevice: *mut DISPLAY_DEVICEW, dwFlags: DWORD) -> BOOL;
+
+    // http://msdn.microsoft.com/en-us/library/dd162612(v=vs.85).aspx
+    pub fn EnumDisplaySettingsExW(lpszDeviceName: LPCWSTR, iModeNum: DWORD,
+        lpDevMode: *mut DEVMODE, dwFlags: DWORD) -> BOOL;
+
     // http://msdn.microsoft.com/en-us/library/windows/desktop/dd162719(v=vs.85).aspx
     pub fn FillRect(hDC: HDC, lprc: *const RECT, hbr: HBRUSH) -> libc::c_int;
 

src/win32/mod.rs

@@ -4,8 +4,11 @@ use std::sync::atomics::AtomicBool;
 use std::ptr;
 use {Event, Hints};
 
+pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};
+
 mod event;
 mod ffi;
+mod monitor;
 
 pub struct Window {
     window: ffi::HWND,
@@ -17,16 +20,6 @@ pub struct Window {
     nosend: NoSend,
 }
 
-pub struct MonitorID(uint);
-
-pub fn get_available_monitors() -> Vec<MonitorID> {
-    unimplemented!()
-}
-
-pub fn get_primary_monitor() -> MonitorID {
-    unimplemented!()
-}
-
 /// Stores the list of all the windows.
 /// Only available on callback thread.
 local_data_key!(pub WINDOWS_LIST: Mutex<Vec<(ffi::HWND, Sender<Event>)>>)
@@ -78,6 +71,18 @@ impl Window {
 
         // switching to fullscreen
         if monitor.is_some() {
+            let monitor = monitor.as_ref().unwrap();
+
+            // adjusting the rect
+            {
+                let pos = monitor.get_position();
+                rect.left += pos.val0() as ffi::LONG;
+                rect.right += pos.val0() as ffi::LONG;
+                rect.top += pos.val1() as ffi::LONG;
+                rect.bottom += pos.val1() as ffi::LONG;
+            }
+
+            // changing device settings
             let mut screen_settings: ffi::DEVMODE = unsafe { mem::zeroed() };
             screen_settings.dmSize = mem::size_of::<ffi::DEVMODE>() as ffi::WORD;
             screen_settings.dmPelsWidth = 1024;
@@ -85,7 +90,8 @@ impl Window {
             screen_settings.dmBitsPerPel = 32;
             screen_settings.dmFields = ffi::DM_BITSPERPEL | ffi::DM_PELSWIDTH | ffi::DM_PELSHEIGHT;
 
-            let result = unsafe { ffi::ChangeDisplaySettingsW(&mut screen_settings, ffi::CDS_FULLSCREEN) };
+            let result = unsafe { ffi::ChangeDisplaySettingsExW(monitor.get_system_name().as_ptr(),
+                &mut screen_settings, ptr::mut_null(), ffi::CDS_FULLSCREEN, ptr::mut_null()) };
             if result != ffi::DISP_CHANGE_SUCCESSFUL {
                 return Err(format!("ChangeDisplaySettings failed: {}", result))
             }

src/win32/monitor.rs

@@ -0,0 +1,79 @@
+use super::ffi;
+
+pub struct MonitorID {
+    name: [ffi::WCHAR, ..32],
+    readable_name: String,
+    flags: ffi::DWORD,
+    position: (uint, uint),
+}
+
+pub fn get_available_monitors() -> Vec<MonitorID> {
+    use std::{iter, mem, ptr};
+
+    let mut result = Vec::new();
+
+    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;
+
+        if unsafe { ffi::EnumDisplayDevicesW(ptr::null(), id as ffi::DWORD, &mut output, 0) } == 0 {
+            break
+        }
+
+        if  (output.StateFlags & ffi::DISPLAY_DEVICE_ACTIVE) == 0 ||
+            (output.StateFlags & ffi::DISPLAY_DEVICE_MIRRORING_DRIVER) != 0
+        {
+            continue
+        }
+
+        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();
+
+        let position = unsafe {
+            let mut dev: ffi::DEVMODE = mem::zeroed();
+            dev.dmSize = mem::size_of::<ffi::DEVMODE>() as ffi::WORD;
+
+            if ffi::EnumDisplaySettingsExW(output.DeviceName.as_ptr(), ffi::ENUM_CURRENT_SETTINGS,
+                &mut dev, 0) == 0
+            {
+                continue
+            }
+
+            let point: &ffi::POINTL = mem::transmute(&dev.union1);
+            (point.x as uint, point.y as uint)
+        };
+
+        result.push(MonitorID {
+            name: output.DeviceName,
+            readable_name: readable_name,
+            flags: output.StateFlags,
+            position: position,
+        });
+    }
+
+    result
+}
+
+pub fn get_primary_monitor() -> MonitorID {
+    for monitor in get_available_monitors().move_iter() {
+        if (monitor.flags & ffi::DISPLAY_DEVICE_PRIMARY_DEVICE) != 0 {
+            return monitor
+        }
+    }
+
+    fail!("Failed to find the primary monitor")
+}
+
+impl MonitorID {
+    pub fn get_name(&self) -> Option<String> {
+        Some(self.readable_name.clone())
+    }
+
+    pub fn get_system_name(&self) -> &[ffi::WCHAR] {
+        self.name.as_slice()
+    }
+
+    pub fn get_position(&self) -> (uint, uint) {
+        self.position
+    }
+}

src/x11/mod.rs

@@ -24,6 +24,12 @@ pub fn get_primary_monitor() -> MonitorID {
     unimplemented!()
 }
 
+impl MonitorID {
+    pub fn get_name(&self) -> Option<String> {
+        Some("<Unknown>".to_string())
+    }
+}
+
 impl Window {
     pub fn new(dimensions: Option<(uint, uint)>, title: &str, hints: &Hints, _: Option<MonitorID>)
         -> Result<Window, String>