diff options
Diffstat (limited to 'src/x11/window/mod.rs')
| -rw-r--r-- | src/x11/window/mod.rs | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/src/x11/window/mod.rs b/src/x11/window/mod.rs new file mode 100644 index 0000000..58439e8 --- /dev/null +++ b/src/x11/window/mod.rs @@ -0,0 +1,499 @@ +use {Event, WindowBuilder}; +use libc; +use std::{mem, ptr}; +use std::sync::atomics::AtomicBool; +use super::ffi; + +pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor}; + +mod events; +mod monitor; + +pub struct Window { + display: *mut ffi::Display, + window: ffi::Window, + im: ffi::XIM, + ic: ffi::XIC, + context: ffi::GLXContext, + is_closed: AtomicBool, + wm_delete_window: ffi::Atom, + xf86_desk_mode: *mut ffi::XF86VidModeModeInfo, + screen_id: libc::c_int, + is_fullscreen: bool, +} + +impl Window { + pub fn new(builder: WindowBuilder) -> Result<Window, String> { + let dimensions = builder.dimensions.unwrap_or((800, 600)); + + // calling XOpenDisplay + let display = unsafe { + let display = ffi::XOpenDisplay(ptr::null()); + if display.is_null() { + return Err(format!("XOpenDisplay failed")); + } + display + }; + + let screen_id = match builder.monitor { + Some(MonitorID(monitor)) => monitor as i32, + None => unsafe { ffi::XDefaultScreen(display) }, + }; + + // getting the FBConfig + let fb_config = unsafe { + static VISUAL_ATTRIBUTES: [libc::c_int, ..23] = [ + ffi::GLX_X_RENDERABLE, 1, + ffi::GLX_DRAWABLE_TYPE, ffi::GLX_WINDOW_BIT, + ffi::GLX_RENDER_TYPE, ffi::GLX_RGBA_BIT, + ffi::GLX_X_VISUAL_TYPE, ffi::GLX_TRUE_COLOR, + ffi::GLX_RED_SIZE, 8, + ffi::GLX_GREEN_SIZE, 8, + ffi::GLX_BLUE_SIZE, 8, + ffi::GLX_ALPHA_SIZE, 8, + ffi::GLX_DEPTH_SIZE, 24, + ffi::GLX_STENCIL_SIZE, 8, + ffi::GLX_DOUBLEBUFFER, 1, + 0 + ]; + + let mut num_fb: libc::c_int = mem::uninitialized(); + + let fb = ffi::glXChooseFBConfig(display, ffi::XDefaultScreen(display), + VISUAL_ATTRIBUTES.as_ptr(), &mut num_fb); + if fb.is_null() { + return Err(format!("glXChooseFBConfig failed")); + } + let preferred_fb = *fb; // TODO: choose more wisely + ffi::XFree(fb as *const libc::c_void); + preferred_fb + }; + + let mut best_mode = -1; + let modes = unsafe { + let mut mode_num: libc::c_int = mem::uninitialized(); + let mut modes: *mut *mut ffi::XF86VidModeModeInfo = mem::uninitialized(); + if ffi::XF86VidModeGetAllModeLines(display, screen_id, &mut mode_num, &mut modes) == 0 { + return Err(format!("Could not query the video modes")); + } + + for i in range(0, mode_num) { + let mode: ffi::XF86VidModeModeInfo = **modes.offset(i as int); + if mode.hdisplay == dimensions.val0() as u16 && mode.vdisplay == dimensions.val1() as u16 { + best_mode = i; + } + }; + if best_mode == -1 { + return Err(format!("Could not find a suitable graphics mode")); + } + + modes + }; + + let xf86_desk_mode = unsafe { + *modes.offset(0) + }; + + // getting the visual infos + let visual_infos = unsafe { + let vi = ffi::glXGetVisualFromFBConfig(display, fb_config); + if vi.is_null() { + return Err(format!("glXChooseVisual failed")); + } + let vi_copy = *vi; + ffi::XFree(vi as *const libc::c_void); + vi_copy + }; + + // 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 | ffi::PointerMotionMask | + ffi::KeyReleaseMask | ffi::ButtonPressMask | + ffi::ButtonReleaseMask | ffi::KeymapStateMask; + swa.border_pixel = 0; + swa.override_redirect = 0; + swa + }; + + let mut window_attributes = ffi::CWBorderPixel | ffi::CWColormap | ffi:: CWEventMask; + if builder.monitor.is_some() { + window_attributes |= ffi::CWOverrideRedirect; + unsafe { + ffi::XF86VidModeSwitchToMode(display, screen_id, *modes.offset(best_mode as int)); + ffi::XF86VidModeSetViewPort(display, screen_id, 0, 0); + set_win_attr.override_redirect = 1; + } + } + + // finally creating the window + let window = unsafe { + let win = ffi::XCreateWindow(display, root, 0, 0, dimensions.val0() as libc::c_uint, + dimensions.val1() as libc::c_uint, 0, visual_infos.depth, ffi::InputOutput, + visual_infos.visual, window_attributes, + &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(builder.title.as_slice().as_ptr())); + ffi::XFlush(display); + + wm_delete_window + }; + + // getting the pointer to glXCreateContextAttribs + let create_context_attribs = unsafe { + let mut addr = ffi::glXGetProcAddress(b"glXCreateContextAttribs".as_ptr() + as *const u8) as *const (); + + if addr.is_null() { + addr = ffi::glXGetProcAddress(b"glXCreateContextAttribsARB".as_ptr() + as *const u8) as *const (); + } + + addr.as_ref().map(|addr| { + let addr: extern "system" fn(*mut ffi::Display, ffi::GLXFBConfig, ffi::GLXContext, + ffi::Bool, *const libc::c_int) -> ffi::GLXContext = mem::transmute(addr); + addr + }) + }; + + // creating IM + let im = unsafe { + let im = ffi::XOpenIM(display, ptr::null(), ptr::null_mut(), ptr::null_mut()); + if im.is_null() { + return Err(format!("XOpenIM failed")); + } + im + }; + + // creating input context + let ic = unsafe { + use std::c_str::ToCStr; + + let ic = ffi::XCreateIC(im, "inputStyle".to_c_str().as_ptr(), + ffi::XIMPreeditNothing | ffi::XIMStatusNothing, "clientWindow".to_c_str().as_ptr(), + window, ptr::null()); + if ic.is_null() { + return Err(format!("XCreateIC failed")); + } + ffi::XSetICFocus(ic); + ic + }; + + // Attempt to make keyboard input repeat detectable + unsafe { + let mut supported_ptr = false; + ffi::XkbSetDetectableAutoRepeat(display, true, &mut supported_ptr); + if !supported_ptr { + return Err(format!("XkbSetDetectableAutoRepeat failed")); + } + } + + + // creating GL context + let context = unsafe { + let mut attributes = Vec::new(); + + if builder.gl_version.is_some() { + let version = builder.gl_version.as_ref().unwrap(); + attributes.push(ffi::GLX_CONTEXT_MAJOR_VERSION); + attributes.push(version.val0() as libc::c_int); + attributes.push(ffi::GLX_CONTEXT_MINOR_VERSION); + attributes.push(version.val1() as libc::c_int); + } + + attributes.push(0); + + let context = if create_context_attribs.is_some() { + let create_context_attribs = create_context_attribs.unwrap(); + create_context_attribs(display, fb_config, ptr::null(), 1, + attributes.as_ptr()) + } else { + ffi::glXCreateContext(display, &visual_infos, ptr::null(), 1) + }; + + if context.is_null() { + return Err(format!("GL context creation failed")); + } + + context + }; + + // creating the window object + let window = Window { + display: display, + window: window, + im: im, + ic: ic, + context: context, + is_closed: AtomicBool::new(false), + wm_delete_window: wm_delete_window, + xf86_desk_mode: xf86_desk_mode, + screen_id: screen_id, + is_fullscreen: builder.monitor.is_some(), + }; + + // calling glViewport + unsafe { + let ptr = window.get_proc_address("glViewport"); + assert!(!ptr.is_null()); + let ptr: extern "system" fn(libc::c_int, libc::c_int, libc::c_int, libc::c_int) = + mem::transmute(ptr); + let dimensions = window.get_inner_size().unwrap(); + ptr(0, 0, dimensions.val0() as libc::c_int, dimensions.val1() as libc::c_int); + } + + // returning + Ok(window) + } + + pub fn is_closed(&self) -> bool { + use std::sync::atomics::Relaxed; + self.is_closed.load(Relaxed) + } + + pub fn set_title(&self, title: &str) { + unsafe { + ffi::XStoreName(self.display, self.window, + mem::transmute(title.as_slice().as_ptr())); + } + } + + fn get_geometry(&self) -> Option<(int, int, uint, uint)> { + unsafe { + use std::mem; + + let mut root: ffi::Window = mem::uninitialized(); + let mut x: libc::c_int = mem::uninitialized(); + let mut y: libc::c_int = mem::uninitialized(); + let mut width: libc::c_uint = mem::uninitialized(); + let mut height: libc::c_uint = mem::uninitialized(); + let mut border: libc::c_uint = mem::uninitialized(); + let mut depth: libc::c_uint = mem::uninitialized(); + + if ffi::XGetGeometry(self.display, self.window, + &mut root, &mut x, &mut y, &mut width, &mut height, + &mut border, &mut depth) == 0 + { + return None; + } + + Some((x as int, y as int, width as uint, height as uint)) + } + } + + pub fn get_position(&self) -> Option<(int, int)> { + self.get_geometry().map(|(x, y, _, _)| (x, y)) + } + + pub fn set_position(&self, x: int, y: int) { + unsafe { ffi::XMoveWindow(self.display, self.window, x as libc::c_int, y as libc::c_int) } + } + + pub fn get_inner_size(&self) -> Option<(uint, uint)> { + self.get_geometry().map(|(_, _, w, h)| (w, h)) + } + + pub fn get_outer_size(&self) -> Option<(uint, uint)> { + unimplemented!() + } + + pub fn set_inner_size(&self, _x: uint, _y: uint) { + unimplemented!() + } + + pub fn poll_events(&self) -> Vec<Event> { + use std::mem; + + let mut events = Vec::new(); + + loop { + use std::num::Bounded; + + let mut xev = unsafe { mem::uninitialized() }; + let res = unsafe { ffi::XCheckMaskEvent(self.display, Bounded::max_value(), &mut xev) }; + + if res == 0 { + let res = unsafe { ffi::XCheckTypedEvent(self.display, ffi::ClientMessage, &mut xev) }; + + if res == 0 { + break + } + } + + match xev.type_ { + ffi::KeymapNotify => { + unsafe { ffi::XRefreshKeyboardMapping(&xev) } + }, + + 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.is_closed.store(true, Relaxed); + events.push(Closed); + } + }, + + ffi::ResizeRequest => { + use Resized; + let rs_event: &ffi::XResizeRequestEvent = unsafe { mem::transmute(&xev) }; + events.push(Resized(rs_event.width as uint, rs_event.height as uint)); + }, + + ffi::MotionNotify => { + use MouseMoved; + let event: &ffi::XMotionEvent = unsafe { mem::transmute(&xev) }; + events.push(MouseMoved((event.x as int, event.y as int))); + }, + + ffi::KeyPress | ffi::KeyRelease => { + use {KeyboardInput, Pressed, Released, ReceivedCharacter, KeyModifiers}; + let event: &mut ffi::XKeyEvent = unsafe { mem::transmute(&xev) }; + + if event.type_ == ffi::KeyPress { + let raw_ev: *mut ffi::XKeyEvent = event; + unsafe { ffi::XFilterEvent(mem::transmute(raw_ev), self.window) }; + } + + let state = if xev.type_ == ffi::KeyPress { Pressed } else { Released }; + + let written = unsafe { + use std::str; + + let mut buffer: [u8, ..16] = [mem::uninitialized(), ..16]; + let raw_ev: *mut ffi::XKeyEvent = event; + let count = ffi::Xutf8LookupString(self.ic, mem::transmute(raw_ev), + mem::transmute(buffer.as_mut_ptr()), + buffer.len() as libc::c_int, ptr::null_mut(), ptr::null_mut()); + + str::from_utf8(buffer.as_slice().slice_to(count as uint)) + .unwrap_or("").to_string() + }; + + for chr in written.as_slice().chars() { + events.push(ReceivedCharacter(chr)); + } + + let keysym = unsafe { + ffi::XKeycodeToKeysym(self.display, event.keycode as ffi::KeyCode, 0) + }; + + let vkey = events::keycode_to_element(keysym as libc::c_uint); + + events.push(KeyboardInput(state, event.keycode as u8, + vkey, KeyModifiers::empty())); + // + }, + + ffi::ButtonPress | ffi::ButtonRelease => { + use {MouseInput, Pressed, Released}; + use {LeftMouseButton, RightMouseButton, MiddleMouseButton, OtherMouseButton}; + let event: &ffi::XButtonEvent = unsafe { mem::transmute(&xev) }; + + let state = if xev.type_ == ffi::ButtonPress { Pressed } else { Released }; + + let button = match event.button { + ffi::Button1 => Some(LeftMouseButton), + ffi::Button2 => Some(MiddleMouseButton), + ffi::Button3 => Some(RightMouseButton), + ffi::Button4 => Some(OtherMouseButton(4)), + ffi::Button5 => Some(OtherMouseButton(5)), + _ => None + }; + + match button { + Some(button) => + events.push(MouseInput(state, button)), + None => () + }; + }, + + _ => () + } + } + + events + } + + pub fn wait_events(&self) -> Vec<Event> { + use std::mem; + + loop { + // this will block until an event arrives, but doesn't remove + // it from the queue + let mut xev = unsafe { mem::uninitialized() }; + unsafe { ffi::XPeekEvent(self.display, &mut xev) }; + + // calling poll_events() + let ev = self.poll_events(); + if ev.len() >= 1 { + return ev; + } + } + } + + pub unsafe fn make_current(&self) { + let res = 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| { + ffi::glXGetProcAddress(mem::transmute(s)) as *const () + }) + } + } + + pub fn swap_buffers(&self) { + unsafe { ffi::glXSwapBuffers(self.display, self.window) } + } +} + +impl Drop for Window { + fn drop(&mut self) { + unsafe { ffi::glXMakeCurrent(self.display, 0, ptr::null()); } + unsafe { ffi::glXDestroyContext(self.display, self.context); } + + if self.is_fullscreen { + unsafe { ffi::XF86VidModeSwitchToMode(self.display, self.screen_id, self.xf86_desk_mode); } + unsafe { ffi::XF86VidModeSetViewPort(self.display, self.screen_id, 0, 0); } + } + + unsafe { ffi::XDestroyIC(self.ic); } + unsafe { ffi::XCloseIM(self.im); } + unsafe { ffi::XDestroyWindow(self.display, self.window); } + unsafe { ffi::XCloseDisplay(self.display); } + } +} |