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use {Event, Hints, MonitorID};
use libc;
use std::{mem, ptr};
use std::sync::atomics::AtomicBool;
mod ffi;
pub struct Window {
display: *mut ffi::Display,
window: ffi::Window,
context: ffi::GLXContext,
should_close: AtomicBool,
wm_delete_window: ffi::Atom,
}
impl Window {
pub fn new(dimensions: Option<(uint, uint)>, title: &str, hints: &Hints, _: Option<MonitorID>)
-> Result<Window, String>
{
// calling XOpenDisplay
let display = unsafe {
let display = ffi::XOpenDisplay(ptr::null());
if display.is_null() {
return Err(format!("XOpenDisplay failed"));
}
display
};
// TODO: set error handler
static VISUAL_ATTRIBUTES: [libc::c_int, ..5] = [
ffi::GLX_RGBA,
ffi::GLX_DEPTH_SIZE,
24,
ffi::GLX_DOUBLEBUFFER,
0
];
// getting the visual infos
let visual_infos = unsafe {
let vi = ffi::glXChooseVisual(display, 0, VISUAL_ATTRIBUTES.as_ptr());
if vi.is_null() {
return Err(format!("glXChooseVisual failed"));
}
vi
};
// getting the root window
let root = unsafe { ffi::XDefaultRootWindow(display) };
// creating the color map
let cmap = unsafe {
let cmap = ffi::XCreateColormap(display, root,
(*visual_infos).visual, ffi::AllocNone);
// TODO: error checking?
cmap
};
// creating
let mut set_win_attr = {
let mut swa: ffi::XSetWindowAttributes = unsafe { mem::zeroed() };
swa.colormap = cmap;
swa.event_mask = ffi::ExposureMask | ffi::ResizeRedirectMask |
ffi::VisibilityChangeMask | ffi::KeyPressMask;
swa
};
// finally creating the window
let window = unsafe {
let dimensions = dimensions.unwrap_or((800, 600));
let win = ffi::XCreateWindow(display, root, 50, 50, dimensions.val0() as libc::c_uint,
dimensions.val1() as libc::c_uint, 0, (*visual_infos).depth, ffi::InputOutput,
(*visual_infos).visual, ffi::CWColormap | ffi::CWEventMask,
&mut set_win_attr);
win
};
// creating window, step 2
let wm_delete_window = unsafe {
use std::c_str::ToCStr;
ffi::XMapWindow(display, window);
let mut wm_delete_window = ffi::XInternAtom(display,
"WM_DELETE_WINDOW".to_c_str().as_ptr() as *const libc::c_char, 0);
ffi::XSetWMProtocols(display, window, &mut wm_delete_window, 1);
ffi::XStoreName(display, window, mem::transmute(title.as_slice().as_ptr()));
ffi::XFlush(display);
wm_delete_window
};
// creating GL context
let context = unsafe {
ffi::glXCreateContext(display, visual_infos, ptr::null(), 1)
};
// returning
Ok(Window{
display: display,
window: window,
context: context,
should_close: AtomicBool::new(false),
wm_delete_window: wm_delete_window,
})
}
pub fn should_close(&self) -> bool {
use std::sync::atomics::Relaxed;
self.should_close.load(Relaxed)
}
pub fn set_title(&self, title: &str) {
unsafe {
ffi::XStoreName(self.display, self.window,
mem::transmute(title.as_slice().as_ptr()));
}
}
pub fn get_position(&self) -> (uint, uint) {
unimplemented!()
}
pub fn set_position(&self, x: uint, y: uint) {
unimplemented!()
}
pub fn get_size(&self) -> (uint, uint) {
unimplemented!()
}
pub fn set_size(&self, x: uint, y: uint) {
unimplemented!()
}
pub fn poll_events(&self) -> Vec<Event> {
unimplemented!()
}
pub fn wait_events(&self) -> Vec<Event> {
use std::mem;
let mut xev = unsafe { mem::uninitialized() };
unsafe { ffi::XNextEvent(self.display, &mut xev) };
let mut events = Vec::new();
match xev.type_ {
ffi::ClientMessage => {
use Closed;
use std::sync::atomics::Relaxed;
let client_msg: &ffi::XClientMessageEvent = unsafe { mem::transmute(&xev) };
if client_msg.l[0] == self.wm_delete_window as libc::c_long {
self.should_close.store(true, Relaxed);
events.push(Closed);
}
},
_ => ()
}
events
}
pub fn make_current(&self) {
let res = unsafe { ffi::glXMakeCurrent(self.display, self.window, self.context) };
if res == 0 {
fail!("glXMakeCurrent failed");
}
}
pub fn get_proc_address(&self, addr: &str) -> *const () {
use std::c_str::ToCStr;
use std::mem;
unsafe {
addr.with_c_str(|s| {
let p = ffi::glXGetProcAddress(mem::transmute(s)) as *const ();
if !p.is_null() { return p; }
println!("{}", p);
p
})
}
}
pub fn swap_buffers(&self) {
unsafe { ffi::glXSwapBuffers(self.display, self.window) }
}
}
impl Drop for Window {
fn drop(&mut self) {
unsafe { ffi::glXDestroyContext(self.display, self.context) }
unsafe { ffi::XDestroyWindow(self.display, self.window) }
unsafe { ffi::XCloseDisplay(self.display) }
}
}
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