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|
use std::kinds::marker::NoSend;
use std::sync::Mutex;
use std::sync::atomics::AtomicBool;
use std::ptr;
use {Event, Hints};
mod event;
mod ffi;
pub struct Window {
window: ffi::HWND,
hdc: ffi::HDC,
context: ffi::HGLRC,
gl_library: ffi::HMODULE,
events_receiver: Receiver<Event>,
should_close: AtomicBool,
nosend: NoSend,
}
/// Stores the list of all the windows.
/// Only available on callback thread.
local_data_key!(pub WINDOWS_LIST: Mutex<Vec<(ffi::HWND, Sender<Event>)>>)
impl Window {
pub fn new(dimensions: Option<(uint, uint)>, title: &str, _hints: &Hints)
-> Result<Window, String>
{
use std::mem;
use std::os;
// initializing WINDOWS_LIST if needed
// this is safe because WINDOWS_LIST is task-local
if WINDOWS_LIST.get().is_none() {
WINDOWS_LIST.replace(Some(Mutex::new(Vec::new())));
}
// registering the window class
let class_name: Vec<u16> = "Window Class".utf16_units().collect::<Vec<u16>>()
.append_one(0);
let class = ffi::WNDCLASSEX {
cbSize: mem::size_of::<ffi::WNDCLASSEX>() as ffi::UINT,
style: ffi::CS_HREDRAW | ffi::CS_VREDRAW,
lpfnWndProc: callback,
cbClsExtra: 0,
cbWndExtra: 0,
hInstance: unsafe { ffi::GetModuleHandleW(ptr::null()) },
hIcon: ptr::mut_null(),
hCursor: ptr::mut_null(),
hbrBackground: ptr::mut_null(),
lpszMenuName: ptr::null(),
lpszClassName: class_name.as_ptr(),
hIconSm: ptr::mut_null(),
};
if unsafe { ffi::RegisterClassExW(&class) } == 0 {
use std::os;
return Err(format!("RegisterClassEx function failed: {}",
os::error_string(os::errno() as uint)))
}
// creating the window
let handle = unsafe {
use libc;
let handle = ffi::CreateWindowExW(0, class_name.as_ptr(),
title.utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr() as ffi::LPCWSTR,
ffi::WS_OVERLAPPEDWINDOW | ffi::WS_VISIBLE,
dimensions.map(|(x, _)| x as libc::c_int).unwrap_or(ffi::CW_USEDEFAULT),
dimensions.map(|(_, y)| y as libc::c_int).unwrap_or(ffi::CW_USEDEFAULT),
ffi::CW_USEDEFAULT, ffi::CW_USEDEFAULT,
ptr::mut_null(), ptr::mut_null(), ffi::GetModuleHandleW(ptr::null()),
ptr::mut_null());
if handle.is_null() {
use std::os;
return Err(format!("CreateWindowEx function failed: {}",
os::error_string(os::errno() as uint)))
}
handle
};
// adding it to WINDOWS_LIST
let events_receiver = {
let (tx, rx) = channel();
let list = WINDOWS_LIST.get().unwrap();
let mut list = list.lock();
list.push((handle, tx));
rx
};
// Getting the HDC of the window
let hdc = {
let hdc = unsafe { ffi::GetDC(handle) };
if hdc.is_null() {
return Err(format!("GetDC function failed: {}",
os::error_string(os::errno() as uint)))
}
hdc
};
// getting the pixel format that we will use
// TODO: use something cleaner which uses hints
let pixel_format = {
let mut output: ffi::PIXELFORMATDESCRIPTOR = unsafe { mem::uninitialized() };
if unsafe { ffi::DescribePixelFormat(hdc, 1,
mem::size_of::<ffi::PIXELFORMATDESCRIPTOR>() as ffi::UINT, &mut output) } == 0
{
return Err(format!("DescribePixelFormat function failed: {}",
os::error_string(os::errno() as uint)))
}
output
};
// calling SetPixelFormat
unsafe {
if ffi::SetPixelFormat(hdc, 1, &pixel_format) == 0 {
return Err(format!("SetPixelFormat function failed: {}",
os::error_string(os::errno() as uint)))
}
}
// creating the context
let context = {
let ctxt = unsafe { ffi::wglCreateContext(hdc) };
if ctxt.is_null() {
return Err(format!("wglCreateContext function failed: {}",
os::error_string(os::errno() as uint)))
}
ctxt
};
// loading opengl32
let gl_library = {
let name = "opengl32.dll".utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr();
let lib = unsafe { ffi::LoadLibraryW(name) };
if lib.is_null() {
return Err(format!("LoadLibrary function failed: {}",
os::error_string(os::errno() as uint)))
}
lib
};
// building the struct
Ok(Window{
window: handle,
hdc: hdc,
context: context,
gl_library: gl_library,
events_receiver: events_receiver,
should_close: AtomicBool::new(false),
nosend: NoSend,
})
}
pub fn should_close(&self) -> bool {
use std::sync::atomics::Relaxed;
self.should_close.load(Relaxed)
}
/// Calls SetWindowText on the HWND.
pub fn set_title(&self, text: &str) {
unsafe {
ffi::SetWindowTextW(self.window,
text.utf16_units().collect::<Vec<u16>>().append_one(0).as_ptr() as ffi::LPCWSTR);
}
}
pub fn get_position(&self) -> (uint, uint) {
unimplemented!()
}
pub fn set_position(&self, x: uint, y: uint) {
use libc;
unsafe {
ffi::SetWindowPos(self.window, ptr::mut_null(), x as libc::c_int, y as libc::c_int,
0, 0, ffi::SWP_NOZORDER | ffi::SWP_NOSIZE);
ffi::UpdateWindow(self.window);
}
}
pub fn get_size(&self) -> (uint, uint) {
unimplemented!()
}
pub fn set_size(&self, x: uint, y: uint) {
use libc;
unsafe {
ffi::SetWindowPos(self.window, ptr::mut_null(), 0, 0, x as libc::c_int,
y as libc::c_int, ffi::SWP_NOZORDER | ffi::SWP_NOREPOSITION);
ffi::UpdateWindow(self.window);
}
}
// TODO: return iterator
pub fn poll_events(&self) -> Vec<Event> {
use std::mem;
loop {
let mut msg = unsafe { mem::uninitialized() };
if unsafe { ffi::PeekMessageW(&mut msg, ptr::mut_null(), 0, 0, 1) } == 0 {
break
}
unsafe { ffi::TranslateMessage(&msg) };
unsafe { ffi::DispatchMessageW(&msg) };
}
let mut events = Vec::new();
loop {
match self.events_receiver.try_recv() {
Ok(ev) => events.push(ev),
Err(_) => break
}
}
events
}
// TODO: return iterator
pub fn wait_events(&self) -> Vec<Event> {
use std::mem;
loop {
{
let mut msg = unsafe { mem::uninitialized() };
if unsafe { ffi::GetMessageW(&mut msg, ptr::mut_null(), 0, 0) } == 0 {
use std::sync::atomics::Relaxed;
use Closed;
self.should_close.store(true, Relaxed);
return vec![Closed]
}
unsafe { ffi::TranslateMessage(&msg) };
unsafe { ffi::DispatchMessageW(&msg) };
}
let mut events = Vec::new();
loop {
match self.events_receiver.try_recv() {
Ok(ev) => events.push(ev),
Err(_) => break
}
}
if events.len() >= 1 {
return events
}
}
}
pub fn make_current(&self) {
unsafe { ffi::wglMakeCurrent(self.hdc, self.context) }
}
pub fn get_proc_address(&self, addr: &str) -> *const () {
use std::c_str::ToCStr;
unsafe {
addr.with_c_str(|s| {
let p = ffi::wglGetProcAddress(s) as *const ();
if !p.is_null() { return p; }
ffi::GetProcAddress(self.gl_library, s) as *const ()
})
}
}
pub fn swap_buffers(&self) {
unsafe {
ffi::SwapBuffers(self.hdc);
}
}
}
#[unsafe_destructor]
impl Drop for Window {
fn drop(&mut self) {
unsafe { ffi::DestroyWindow(self.window); }
}
}
fn send_event(window: ffi::HWND, event: Event) {
let locked = WINDOWS_LIST.get().unwrap();
let mut locked = locked.lock();
locked.retain(|&(ref val, ref sender)| {
if val != &window { return true }
sender.send_opt(event).is_ok()
});
}
extern "stdcall" fn callback(window: ffi::HWND, msg: ffi::UINT,
wparam: ffi::WPARAM, lparam: ffi::LPARAM) -> ffi::LRESULT
{
match msg {
ffi::WM_DESTROY => {
use Closed;
unsafe { ffi::PostQuitMessage(0); }
send_event(window, Closed);
0
},
ffi::WM_SIZE => {
use SizeChanged;
let w = ffi::LOWORD(lparam as ffi::DWORD) as uint;
let h = ffi::HIWORD(lparam as ffi::DWORD) as uint;
send_event(window, SizeChanged(w, h));
0
},
ffi::WM_PAINT => {
/*use NeedRefresh;
send_event(window, NeedRefresh);*/
0
},
ffi::WM_CHAR => {
use std::mem;
use events::ReceivedCharacter;
let chr: char = unsafe { mem::transmute(wparam) };
send_event(window, ReceivedCharacter(chr));
0
},
ffi::WM_MOUSEMOVE => {
use CursorPositionChanged;
let x = ffi::GET_X_LPARAM(lparam) as uint;
let y = ffi::GET_Y_LPARAM(lparam) as uint;
send_event(window, CursorPositionChanged(x, y));
0
},
ffi::WM_KEYDOWN => {
use events::Pressed;
let element = event::vkeycode_to_element(wparam);
if element.is_some() {
send_event(window, Pressed(element.unwrap()));
}
0
},
ffi::WM_KEYUP => {
use events::Released;
let element = event::vkeycode_to_element(wparam);
if element.is_some() {
send_event(window, Released(element.unwrap()));
}
0
},
ffi::WM_LBUTTONDOWN => {
use events::{Pressed, Button0};
send_event(window, Pressed(Button0));
0
},
ffi::WM_LBUTTONUP => {
use events::{Released, Button0};
send_event(window, Released(Button0));
0
},
ffi::WM_RBUTTONDOWN => {
use events::{Pressed, Button1};
send_event(window, Pressed(Button1));
0
},
ffi::WM_RBUTTONUP => {
use events::{Released, Button1};
send_event(window, Released(Button1));
0
},
ffi::WM_MBUTTONDOWN => {
use events::{Pressed, Button2};
send_event(window, Pressed(Button2));
0
},
ffi::WM_MBUTTONUP => {
use events::{Released, Button2};
send_event(window, Released(Button2));
0
},
_ => unsafe {
ffi::DefWindowProcW(window, msg, wparam, lparam)
}
}
}
/*fn hints_to_pixelformat(hints: &Hints) -> ffi::PIXELFORMATDESCRIPTOR {
use std::mem;
ffi::PIXELFORMATDESCRIPTOR {
nSize: size_of::<ffi::PIXELFORMATDESCRIPTOR>(),
nVersion: 1,
dwFlags:
if hints.stereo { PFD_STEREO } else { 0 },
iPixelType: PFD_TYPE_RGBA,
cColorBits: hints.red_bits + hints.green_bits + hints.blue_bits,
cRedBits:
pub nSize: WORD,
pub nVersion: WORD,
pub dwFlags: DWORD,
pub iPixelType: BYTE,
pub cColorBits: BYTE,
pub cRedBits: BYTE,
pub cRedShift: BYTE,
pub cGreenBits: BYTE,
pub cGreenShift: BYTE,
pub cBlueBits: BYTE,
pub cBlueShift: BYTE,
pub cAlphaBits: BYTE,
pub cAlphaShift: BYTE,
pub cAccumBits: BYTE,
pub cAccumRedBits: BYTE,
pub cAccumGreenBits: BYTE,
pub cAccumBlueBits: BYTE,
pub cAccumAlphaBits: BYTE,
pub cDepthBits: BYTE,
pub cStencilBits: BYTE,
pub cAuxBuffers: BYTE,
pub iLayerType: BYTE,
pub bReserved: BYTE,
pub dwLayerMask: DWORD,
pub dwVisibleMask: DWORD,
pub dwDamageMask: DWORD,
}
}*/
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