1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
|
use {Event, WindowBuilder};
use CreationError;
use CreationError::OsError;
use libc;
use std::{mem, ptr};
use std::cell::Cell;
use std::sync::atomic::AtomicBool;
use super::ffi;
use std::sync::{Once, ONCE_INIT};
pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor};
mod events;
mod monitor;
static THREAD_INIT: Once = ONCE_INIT;
fn ensure_thread_init() {
THREAD_INIT.doit(|| {
unsafe {
ffi::XInitThreads();
}
});
}
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,
current_size: Cell<(libc::c_int, libc::c_int)>,
}
impl Window {
pub fn new(builder: WindowBuilder) -> Result<Window, CreationError> {
ensure_thread_init();
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(OsError(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 {
let mut visual_attributes = vec![
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,
];
if let Some(val) = builder.multisampling {
visual_attributes.push(ffi::glx::SAMPLE_BUFFERS as libc::c_int);
visual_attributes.push(1);
visual_attributes.push(ffi::glx::SAMPLES as libc::c_int);
visual_attributes.push(val as libc::c_int);
}
visual_attributes.push(0);
let mut num_fb: libc::c_int = mem::uninitialized();
let fb = ffi::glx::ChooseFBConfig(display, ffi::XDefaultScreen(display),
visual_attributes.as_ptr(), &mut num_fb);
if fb.is_null() {
return Err(OsError(format!("glx::ChooseFBConfig 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(OsError(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 && builder.monitor.is_some() {
return Err(OsError(format!("Could not find a suitable graphics mode")));
}
modes
};
let xf86_desk_mode = unsafe {
*modes.offset(0)
};
// getting the visual infos
let mut visual_infos = unsafe {
let vi = ffi::glx::GetVisualFromFBConfig(display, fb_config);
if vi.is_null() {
return Err(OsError(format!("glx::ChooseVisual 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::StructureNotifyMask |
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
};
// set visibility
if builder.visible {
unsafe {
ffi::XMapRaised(display, window);
ffi::XFlush(display);
}
}
// creating window, step 2
let wm_delete_window = unsafe {
use std::c_str::ToCStr;
let delete_window = "WM_DELETE_WINDOW".to_c_str();
let mut wm_delete_window = ffi::XInternAtom(display, delete_window.as_ptr(), 0);
ffi::XSetWMProtocols(display, window, &mut wm_delete_window, 1);
let c_title = builder.title.to_c_str();
ffi::XStoreName(display, window, c_title.as_ptr());
ffi::XFlush(display);
wm_delete_window
};
// creating IM
let im = unsafe {
let im = ffi::XOpenIM(display, ptr::null(), ptr::null_mut(), ptr::null_mut());
if im.is_null() {
return Err(OsError(format!("XOpenIM failed")));
}
im
};
// creating input context
let ic = unsafe {
use std::c_str::ToCStr;
let input_style = "inputStyle".to_c_str();
let client_window = "clientWindow".to_c_str();
let ic = ffi::XCreateIC(im, input_style.as_ptr(),
ffi::XIMPreeditNothing | ffi::XIMStatusNothing, client_window.as_ptr(),
window, ptr::null());
if ic.is_null() {
return Err(OsError(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(OsError(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);
}
if builder.gl_debug {
attributes.push(ffi::glx_extra::CONTEXT_FLAGS_ARB as libc::c_int);
attributes.push(ffi::glx_extra::CONTEXT_DEBUG_BIT_ARB as libc::c_int);
}
attributes.push(0);
// loading the extra GLX functions
let extra_functions = ffi::glx_extra::Glx::load_with(|addr| {
addr.with_c_str(|s| {
use libc;
ffi::glx::GetProcAddress(s as *const u8) as *const libc::c_void
})
});
let share = if let Some(win) = builder.sharing {
win.window.context
} else {
ptr::null()
};
let context = if extra_functions.CreateContextAttribsARB.is_loaded() {
extra_functions.CreateContextAttribsARB(display as *mut ffi::glx_extra::types::Display,
fb_config, share, 1, attributes.as_ptr())
} else {
ffi::glx::CreateContext(display, &mut visual_infos, share, 1)
};
if context.is_null() {
return Err(OsError(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(),
current_size: Cell::new((0, 0)),
};
// returning
Ok(window)
}
pub fn is_closed(&self) -> bool {
use std::sync::atomic::Relaxed;
self.is_closed.load(Relaxed)
}
pub fn set_title(&self, title: &str) {
let c_title = title.to_c_str();
unsafe {
ffi::XStoreName(self.display, self.window, c_title.as_ptr());
ffi::XFlush(self.display);
}
}
pub fn show(&self) {
unsafe {
ffi::XMapRaised(self.display, self.window);
ffi::XFlush(self.display);
}
}
pub fn hide(&self) {
unsafe {
ffi::XUnmapWindow(self.display, self.window);
ffi::XFlush(self.display);
}
}
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 events::Event::Closed;
use std::sync::atomic::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::ConfigureNotify => {
use events::Event::Resized;
let cfg_event: &ffi::XConfigureEvent = unsafe { mem::transmute(&xev) };
let (current_width, current_height) = self.current_size.get();
if current_width != cfg_event.width || current_height != cfg_event.height {
self.current_size.set((cfg_event.width, cfg_event.height));
events.push(Resized(cfg_event.width as uint, cfg_event.height as uint));
}
},
ffi::MotionNotify => {
use events::Event::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 events::Event::{KeyboardInput, ReceivedCharacter};
use events::ElementState::{Pressed, Released};
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));
},
ffi::ButtonPress | ffi::ButtonRelease => {
use events::Event::{MouseInput, MouseWheel};
use events::ElementState::{Pressed, Released};
use events::MouseButton::{LeftMouseButton, RightMouseButton, MiddleMouseButton};
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 => {
events.push(MouseWheel(1));
None
}
ffi::Button5 => {
events.push(MouseWheel(-1));
None
}
_ => 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::glx::MakeCurrent(self.display, self.window, self.context);
if res == 0 {
panic!("glx::MakeCurrent 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::glx::GetProcAddress(mem::transmute(s)) as *const ()
})
}
}
pub fn swap_buffers(&self) {
unsafe { ffi::glx::SwapBuffers(self.display, self.window) }
}
pub fn platform_display(&self) -> *mut libc::c_void {
self.display as *mut libc::c_void
}
}
impl Drop for Window {
fn drop(&mut self) {
unsafe { ffi::glx::MakeCurrent(self.display, 0, ptr::null()); }
unsafe { ffi::glx::DestroyContext(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); }
}
}
|