aboutsummaryrefslogtreecommitdiff
path: root/examples/compositor.c
blob: 721ae6bfef1ab22857b54b079b5d170323645a9a (plain)
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
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
#define _POSIX_C_SOURCE 199309L
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/mman.h>
#include <wayland-server.h>
// TODO: BSD et al
#include <linux/input-event-codes.h>
#include <wlr/backend.h>
#include <wlr/backend/session.h>
#include <wlr/render.h>
#include <wlr/render/matrix.h>
#include <wlr/render/gles2.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/types/wlr_wl_shell.h>
#include <wlr/types/wlr_xdg_shell_v6.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_data_device_manager.h>
#include <wlr/types/wlr_gamma_control.h>
#include "wlr/types/wlr_compositor.h"
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/xwayland.h>
#include <xkbcommon/xkbcommon.h>
#include <wlr/util/log.h>
#include "config.h"
#include "shared.h"
#include <assert.h>

// TODO: move to common header?
int os_create_anonymous_file(off_t size);

struct sample_state;

struct example_xdg_surface_v6 {
	struct wlr_xdg_surface_v6 *surface;
	struct sample_state *sample;

	// position of the wlr_surface in the layout
	struct {
		int lx;
		int ly;
	} position;

	struct wl_listener destroy_listener;
	struct wl_listener ping_timeout_listener;
	struct wl_listener request_minimize_listener;
	struct wl_listener request_move_listener;
	struct wl_listener request_resize_listener;
	struct wl_listener request_show_window_menu_listener;
};

struct input_event_cache {
	uint32_t serial;
	struct wlr_cursor *cursor;
	struct wlr_input_device *device;
};

struct motion_context {
	struct example_xdg_surface_v6 *surface;
	int off_x, off_y;
};

struct sample_state {
	struct wlr_renderer *renderer;
	struct compositor_state *compositor;
	struct wlr_compositor *wlr_compositor;
	struct wlr_wl_shell *wl_shell;
	struct wlr_seat *wl_seat;
	struct wlr_xdg_shell_v6 *xdg_shell;
	struct wlr_data_device_manager *data_device_manager;
	struct wl_resource *focus;
	struct wl_listener keyboard_bound;
	struct wlr_xwayland *xwayland;
	struct wlr_gamma_control_manager *gamma_control_manager;
	bool mod_down;
	int keymap_fd;
	size_t keymap_size;
	uint32_t serial;

	struct motion_context motion_context;

	struct example_config *config;
	struct wlr_output_layout *layout;
	struct wlr_cursor *cursor;
	struct wlr_xcursor *xcursor;

	// Ring buffer
	int input_cache_idx;
	struct input_event_cache input_cache[16];

	struct wl_listener cursor_motion;
	struct wl_listener cursor_motion_absolute;
	struct wl_listener cursor_button;
	struct wl_listener cursor_axis;

	struct wl_listener tool_axis;
	struct wl_listener tool_tip;
	struct wl_listener tool_button;

	struct wl_listener new_xdg_surface_v6;

	struct wlr_xdg_surface_v6 *focused_surface;
};

static void example_set_focused_surface(struct sample_state *sample,
		struct wlr_xdg_surface_v6 *surface) {
	if (sample->focused_surface == surface) {
		return;
	}

	// set activated state of the xdg surfaces
	struct wlr_xdg_surface_v6 *xdg_surface;
	struct wlr_xdg_client_v6 *xdg_client;
	wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
		wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
			if (!xdg_surface->configured ||
					xdg_surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
				continue;
			}
			wlr_xdg_toplevel_v6_set_activated(xdg_surface,
				xdg_surface == surface);
		}
	}

	sample->focused_surface = surface;
}

/*
 * Convert timespec to milliseconds
 */
static inline int64_t timespec_to_msec(const struct timespec *a) {
	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}

static void output_frame_handle_surface(struct sample_state *sample,
		struct wlr_output *wlr_output, struct timespec *ts,
		struct wl_resource *_res, int ox, int oy) {
	struct wlr_surface *surface = wl_resource_get_user_data(_res);
	float matrix[16];
	float transform[16];
	wlr_surface_flush_damage(surface);
	if (surface->texture->valid) {
		wlr_matrix_translate(&transform, ox, oy, 0);
		wlr_surface_get_matrix(surface, &matrix,
			&wlr_output->transform_matrix, &transform);
		wlr_render_with_matrix(sample->renderer, surface->texture, &matrix);

		struct wlr_frame_callback *cb, *cnext;
		wl_list_for_each_safe(cb, cnext, &surface->frame_callback_list, link) {
			wl_callback_send_done(cb->resource, timespec_to_msec(ts));
			wl_resource_destroy(cb->resource);
		}
	}
}

static void handle_xdg_surface_v6_ping_timeout(struct wl_listener *listener,
		void *data) {
	struct wlr_xdg_surface_v6 *surface = data;
	wlr_log(L_DEBUG, "got ping timeout for surface: %s", surface->title);
}

static void handle_xdg_surface_v6_destroy(struct wl_listener *listener,
		void *data) {
	struct example_xdg_surface_v6 *example_surface =
		wl_container_of(listener, example_surface, destroy_listener);
	wl_list_remove(&example_surface->destroy_listener.link);
	wl_list_remove(&example_surface->ping_timeout_listener.link);
	wl_list_remove(&example_surface->request_move_listener.link);
	wl_list_remove(&example_surface->request_resize_listener.link);
	wl_list_remove(&example_surface->request_show_window_menu_listener.link);
	wl_list_remove(&example_surface->request_minimize_listener.link);
	free(example_surface);
}

static void handle_xdg_surface_v6_request_move(struct wl_listener *listener,
		void *data) {
	struct example_xdg_surface_v6 *esurface =
		wl_container_of(listener, esurface, request_move_listener);
	struct wlr_xdg_toplevel_v6_move_event *e = data;
	struct sample_state *sample = esurface->sample;
	struct input_event_cache *event = NULL;
	for (size_t i = 0;
			i < sizeof(sample->input_cache) / sizeof(sample->input_cache[0]);
			++i) {
		if (sample->input_cache[i].cursor
				&& sample->input_cache[i].serial == e->serial) {
			event = &sample->input_cache[i];
			break;
		}
	}
	if (!event || sample->motion_context.surface) {
		return;
	}
	sample->motion_context.surface = esurface;
	sample->motion_context.off_x = sample->cursor->x - esurface->position.lx;
	sample->motion_context.off_y = sample->cursor->y - esurface->position.ly;
	wlr_seat_pointer_clear_focus(sample->wl_seat);
}

static void handle_xdg_surface_v6_request_resize(struct wl_listener *listener,
		void *data) {
	struct example_xdg_surface_v6 *example_surface =
		wl_container_of(listener, example_surface, request_resize_listener);
	struct wlr_xdg_toplevel_v6_resize_event *e = data;
	wlr_log(L_DEBUG, "TODO: surface requested resize: %s", e->surface->title);
}

static void handle_xdg_surface_v6_request_show_window_menu(
		struct wl_listener *listener, void *data) {
	struct example_xdg_surface_v6 *example_surface =
		wl_container_of(listener, example_surface,
			request_show_window_menu_listener);
	struct wlr_xdg_toplevel_v6_show_window_menu_event *e = data;
	wlr_log(L_DEBUG, "TODO: surface requested to show window menu: %s",
		e->surface->title);
}

static void handle_xdg_surface_v6_request_minimize(
		struct wl_listener *listener, void *data) {
	struct example_xdg_surface_v6 *example_surface =
		wl_container_of(listener, example_surface, request_minimize_listener);
	wlr_log(L_DEBUG, "TODO: surface requested to be minimized: %s",
		example_surface->surface->title);
}

static void handle_new_xdg_surface_v6(struct wl_listener *listener,
		void *data) {
	struct sample_state *sample_state =
		wl_container_of(listener, sample_state, new_xdg_surface_v6);
	struct wlr_xdg_surface_v6 *surface = data;
	wlr_log(L_DEBUG, "new xdg surface: title=%s, app_id=%s",
		surface->title, surface->app_id);

	wlr_xdg_surface_v6_ping(surface);

	struct example_xdg_surface_v6 *esurface =
		calloc(1, sizeof(struct example_xdg_surface_v6));
	if (esurface == NULL) {
		return;
	}

	esurface->sample = sample_state;
	esurface->surface = surface;
	// TODO sensible default position
	esurface->position.lx = 300;
	esurface->position.ly = 300;
	surface->data = esurface;

	wl_signal_add(&surface->events.destroy, &esurface->destroy_listener);
	esurface->destroy_listener.notify = handle_xdg_surface_v6_destroy;

	wl_signal_add(&surface->events.ping_timeout,
		&esurface->ping_timeout_listener);
	esurface->ping_timeout_listener.notify = handle_xdg_surface_v6_ping_timeout;

	wl_signal_add(&surface->events.request_move,
		&esurface->request_move_listener);
	esurface->request_move_listener.notify = handle_xdg_surface_v6_request_move;

	wl_signal_add(&surface->events.request_resize,
		&esurface->request_resize_listener);
	esurface->request_resize_listener.notify =
		handle_xdg_surface_v6_request_resize;

	wl_signal_add(&surface->events.request_show_window_menu,
		&esurface->request_show_window_menu_listener);
	esurface->request_show_window_menu_listener.notify =
		handle_xdg_surface_v6_request_show_window_menu;

	wl_signal_add(&surface->events.request_minimize,
		&esurface->request_minimize_listener);
	esurface->request_minimize_listener.notify =
		handle_xdg_surface_v6_request_minimize;
}

static void handle_output_frame(struct output_state *output,
		struct timespec *ts) {
	struct compositor_state *state = output->compositor;
	struct sample_state *sample = state->data;
	struct wlr_output *wlr_output = output->output;

	wlr_output_make_current(wlr_output);
	wlr_renderer_begin(sample->renderer, wlr_output);

	struct wlr_wl_shell_surface *wl_shell_surface;
	wl_list_for_each(wl_shell_surface, &sample->wl_shell->surfaces, link) {
		output_frame_handle_surface(sample, wlr_output, ts,
			wl_shell_surface->surface, 200, 200);
	}
	struct wlr_xdg_surface_v6 *xdg_surface;
	struct wlr_xdg_client_v6 *xdg_client;
	wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
		wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
			if (!xdg_surface->configured) {
				continue;
			}

			struct example_xdg_surface_v6 *esurface = xdg_surface->data;
			assert(esurface);

			int width = xdg_surface->surface->current.buffer_width;
			int height = xdg_surface->surface->current.buffer_height;

			bool intersects_output = wlr_output_layout_intersects(
				sample->layout, wlr_output,
				esurface->position.lx, esurface->position.ly,
				esurface->position.lx + width, esurface->position.ly + height);

			if (intersects_output) {
				double ox = esurface->position.lx, oy = esurface->position.ly;
				wlr_output_layout_output_coords(sample->layout, wlr_output,
					&ox, &oy);
				output_frame_handle_surface(sample, wlr_output, ts,
					xdg_surface->surface->resource, ox, oy);
			}
		}
	}
	struct wlr_x11_window *x11_window;
	wl_list_for_each(x11_window, &sample->xwayland->displayable_windows, link) {
		output_frame_handle_surface(sample, wlr_output, ts,
			x11_window->surface, 200, 200);
	}

	wlr_renderer_end(sample->renderer);
	wlr_output_swap_buffers(wlr_output);
}

static void handle_keyboard_key(struct keyboard_state *keyboard,
		uint32_t keycode, xkb_keysym_t sym, enum wlr_key_state key_state) {
	struct compositor_state *state = keyboard->compositor;
	struct sample_state *sample = state->data;

	struct wl_resource *res = NULL;
	struct wlr_seat_handle *seat_handle = NULL;
	wl_list_for_each(res, &sample->wlr_compositor->surfaces, link) {
		break;
	}

	if (res) {
		seat_handle = wlr_seat_handle_for_client(sample->wl_seat,
			wl_resource_get_client(res));
	}

	if (res != sample->focus && seat_handle && seat_handle->keyboard) {
		struct wl_array keys;
		wl_array_init(&keys);
		wl_keyboard_send_enter(seat_handle->keyboard, ++sample->serial, res,
			&keys);
		sample->focus = res;
	}

	if (seat_handle && seat_handle->keyboard) {
		uint32_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
			XKB_STATE_MODS_DEPRESSED);
		uint32_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
			XKB_STATE_MODS_LATCHED);
		uint32_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
			XKB_STATE_MODS_LOCKED);
		uint32_t group = xkb_state_serialize_layout(keyboard->xkb_state,
			XKB_STATE_LAYOUT_EFFECTIVE);
		wl_keyboard_send_modifiers(seat_handle->keyboard, ++sample->serial,
			depressed, latched, locked, group);
		wl_keyboard_send_key(seat_handle->keyboard, ++sample->serial, 0,
			keycode, key_state);
	}

	if (sym == XKB_KEY_Super_L || sym == XKB_KEY_Super_R) {
		sample->mod_down = key_state == WLR_KEY_PRESSED;
	}
}

static void handle_keyboard_bound(struct wl_listener *listener, void *data) {
	struct wlr_seat_handle *handle = data;
	struct sample_state *state =
		wl_container_of(listener, state, keyboard_bound);

	wl_keyboard_send_keymap(handle->keyboard, WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1,
		state->keymap_fd, state->keymap_size);

	if (wl_resource_get_version(handle->keyboard) >= 2) {
		wl_keyboard_send_repeat_info(handle->keyboard, 25, 600);
	}
}

static struct wlr_xdg_surface_v6 *example_xdg_surface_at(
		struct sample_state *sample, int lx, int ly) {
	struct wlr_xdg_surface_v6 *xdg_surface;
	struct wlr_xdg_client_v6 *xdg_client;
	wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
		wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
			if (!xdg_surface->configured) {
				continue;
			}

			struct example_xdg_surface_v6 *esurface = xdg_surface->data;

			double window_x = esurface->position.lx + xdg_surface->geometry->x;
			double window_y = esurface->position.ly + xdg_surface->geometry->y;

			if (sample->cursor->x >= window_x &&
					sample->cursor->y >= window_y &&
					sample->cursor->x <= window_x +
						xdg_surface->geometry->width &&
					sample->cursor->y <= window_y +
						xdg_surface->geometry->height) {
				return xdg_surface;
			}
		}
	}

	return NULL;
}

static void update_pointer_position(struct sample_state *sample, uint32_t time) {
	if (sample->motion_context.surface) {
		struct example_xdg_surface_v6 *surface;
		surface = sample->motion_context.surface;
		surface->position.lx = sample->cursor->x - sample->motion_context.off_x;
		surface->position.ly = sample->cursor->y - sample->motion_context.off_y;
		return;
	}

	struct wlr_xdg_surface_v6 *surface = example_xdg_surface_at(sample,
			sample->cursor->x, sample->cursor->y);

	if (surface) {
		struct example_xdg_surface_v6 *esurface = surface->data;

		double sx = sample->cursor->x - esurface->position.lx;
		double sy = sample->cursor->y - esurface->position.ly;

		// TODO z-order
		wlr_seat_pointer_enter(sample->wl_seat, surface->surface, sx, sy);
		wlr_seat_pointer_send_motion(sample->wl_seat, time, sx, sy);
	} else {
		wlr_seat_pointer_clear_focus(sample->wl_seat);
	}
}

static void handle_cursor_motion(struct wl_listener *listener, void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, cursor_motion);
	struct wlr_event_pointer_motion *event = data;

	wlr_cursor_move(sample->cursor, event->device, event->delta_x,
		event->delta_y);

	update_pointer_position(sample, (uint32_t)event->time_usec);
}

static void handle_cursor_motion_absolute(struct wl_listener *listener,
		void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, cursor_motion_absolute);
	struct wlr_event_pointer_motion_absolute *event = data;

	wlr_cursor_warp_absolute(sample->cursor, event->device,
		event->x_mm / event->width_mm, event->y_mm / event->height_mm);

	update_pointer_position(sample, (uint32_t)event->time_usec);
}

static void handle_cursor_axis(struct wl_listener *listener, void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, cursor_axis);
	struct wlr_event_pointer_axis *event = data;
	wlr_seat_pointer_send_axis(sample->wl_seat, event->time_sec,
		event->orientation, event->delta);
}

static void handle_cursor_button(struct wl_listener *listener, void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, cursor_button);
	struct wlr_event_pointer_button *event = data;

	struct wlr_xdg_surface_v6 *surface =
		example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);

	uint32_t serial = wlr_seat_pointer_send_button(sample->wl_seat,
			(uint32_t)event->time_usec, event->button, event->state);

	int i;
	switch (event->state) {
	case WLR_BUTTON_RELEASED:
		if (sample->motion_context.surface) {
			sample->motion_context.surface = NULL;
		}
		break;
	case WLR_BUTTON_PRESSED:
		i = sample->input_cache_idx;
		sample->input_cache[i].serial = serial;
		sample->input_cache[i].cursor = sample->cursor;
		sample->input_cache[i].device = event->device;
		sample->input_cache_idx = (i + 1)
			% (sizeof(sample->input_cache) / sizeof(sample->input_cache[0]));
		example_set_focused_surface(sample, surface);
		wlr_log(L_DEBUG, "Stored event %d at %d", serial, i);
		if (sample->mod_down && event->button == BTN_LEFT) {
			struct example_xdg_surface_v6 *esurface = surface->data;
			sample->motion_context.surface = esurface;
			sample->motion_context.off_x = sample->cursor->x - esurface->position.lx;
			sample->motion_context.off_y = sample->cursor->y - esurface->position.ly;
			wlr_seat_pointer_clear_focus(sample->wl_seat);
		}
		break;
	}
}

static void handle_tool_axis(struct wl_listener *listener, void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, tool_axis);
	struct wlr_event_tablet_tool_axis *event = data;
	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X) &&
			(event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
		wlr_cursor_warp_absolute(sample->cursor, event->device,
			event->x_mm / event->width_mm, event->y_mm / event->height_mm);
		update_pointer_position(sample, (uint32_t)event->time_usec);
	}
}

static void handle_tool_tip(struct wl_listener *listener, void *data) {
	struct sample_state *sample =
		wl_container_of(listener, sample, tool_tip);
	struct wlr_event_tablet_tool_tip *event = data;

	struct wlr_xdg_surface_v6 *surface =
		example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);
	example_set_focused_surface(sample, surface);

	wlr_seat_pointer_send_button(sample->wl_seat, (uint32_t)event->time_usec,
		BTN_LEFT, event->state);
}

static void handle_input_add(struct compositor_state *state,
		struct wlr_input_device *device) {
	struct sample_state *sample = state->data;

	if (device->type == WLR_INPUT_DEVICE_POINTER ||
			device->type == WLR_INPUT_DEVICE_TOUCH ||
			device->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
		wlr_cursor_attach_input_device(sample->cursor, device);
		example_config_configure_cursor(sample->config, sample->cursor,
			sample->compositor);
	}
}

static void handle_output_add(struct output_state *ostate) {
	struct sample_state *sample = ostate->compositor->data;
	struct wlr_output *wlr_output = ostate->output;
	struct wlr_xcursor_image *image = sample->xcursor->images[0];

	struct output_config *o_config =
		example_config_get_output(sample->config, ostate->output);

	if (o_config) {
		wlr_output_transform(ostate->output, o_config->transform);
		wlr_output_layout_add(sample->layout, ostate->output, o_config->x,
			o_config->y);
	} else {
		wlr_output_layout_add_auto(sample->layout, ostate->output);
	}

	example_config_configure_cursor(sample->config, sample->cursor,
		sample->compositor);

	// TODO the cursor must be set depending on which surface it is displayed
	// over which should happen in the compositor.
	if (!wlr_output_set_cursor(wlr_output, image->buffer,
			image->width, image->width, image->height)) {
		wlr_log(L_DEBUG, "Failed to set hardware cursor");
		return;
	}

	wlr_cursor_warp(sample->cursor, NULL, sample->cursor->x, sample->cursor->y);
}

static void handle_output_remove(struct output_state *ostate) {
	struct sample_state *sample = ostate->compositor->data;

	wlr_output_layout_remove(sample->layout, ostate->output);

	example_config_configure_cursor(sample->config, sample->cursor,
		sample->compositor);
}

int main(int argc, char *argv[]) {
	struct sample_state state = { 0 };
	struct compositor_state compositor = { 0,
		.data = &state,
		.output_frame_cb = handle_output_frame,
	};

	compositor.input_add_cb = handle_input_add;
	compositor.output_add_cb = handle_output_add;
	compositor.output_remove_cb = handle_output_remove;

	state.compositor = &compositor;
	state.config = parse_args(argc, argv);
	state.cursor = wlr_cursor_create();
	state.layout = wlr_output_layout_create();
	wlr_cursor_attach_output_layout(state.cursor, state.layout);
	wlr_cursor_map_to_region(state.cursor, state.config->cursor.mapped_box);

	struct wlr_xcursor_theme *theme = wlr_xcursor_theme_load("default", 16);
	if (!theme) {
		wlr_log(L_ERROR, "Failed to load cursor theme");
		return 1;
	}
	state.xcursor = wlr_xcursor_theme_get_cursor(theme, "left_ptr");
	if (!state.xcursor) {
		wlr_log(L_ERROR, "Failed to load left_ptr cursor");
		return 1;
	}

	wlr_cursor_set_xcursor(state.cursor, state.xcursor);

	// pointer events
	wl_signal_add(&state.cursor->events.motion, &state.cursor_motion);
	state.cursor_motion.notify = handle_cursor_motion;

	wl_signal_add(&state.cursor->events.motion_absolute,
		&state.cursor_motion_absolute);
	state.cursor_motion_absolute.notify = handle_cursor_motion_absolute;

	wl_signal_add(&state.cursor->events.button, &state.cursor_button);
	state.cursor_button.notify = handle_cursor_button;

	wl_signal_add(&state.cursor->events.axis, &state.cursor_axis);
	state.cursor_axis.notify = handle_cursor_axis;

	wl_signal_add(&state.cursor->events.tablet_tool_axis, &state.tool_axis);
	state.tool_axis.notify = handle_tool_axis;

	wl_signal_add(&state.cursor->events.tablet_tool_tip, &state.tool_tip);
	state.tool_tip.notify = handle_tool_tip;

	compositor_init(&compositor);

	state.renderer = wlr_gles2_renderer_create(compositor.backend);
	if (!state.renderer) {
		wlr_log(L_ERROR, "Could not start compositor, OOM");
		exit(EXIT_FAILURE);
	}
	wl_display_init_shm(compositor.display);
	state.wlr_compositor =
		wlr_compositor_create(compositor.display, state.renderer);
	state.wl_shell = wlr_wl_shell_create(compositor.display);
	state.xdg_shell = wlr_xdg_shell_v6_create(compositor.display);

	// shell events
	wl_signal_add(&state.xdg_shell->events.new_surface,
		&state.new_xdg_surface_v6);
	state.new_xdg_surface_v6.notify = handle_new_xdg_surface_v6;


	state.data_device_manager =
		wlr_data_device_manager_create(compositor.display);

	state.gamma_control_manager =
		wlr_gamma_control_manager_create(compositor.display);

	state.wl_seat = wlr_seat_create(compositor.display, "seat0");
	assert(state.wl_seat);
	state.keyboard_bound.notify = handle_keyboard_bound;
	wl_signal_add(&state.wl_seat->events.keyboard_bound, &state.keyboard_bound);
	wlr_seat_set_capabilities(state.wl_seat, WL_SEAT_CAPABILITY_KEYBOARD
		| WL_SEAT_CAPABILITY_POINTER | WL_SEAT_CAPABILITY_TOUCH);

	struct keyboard_state *kbstate;
	wl_list_for_each(kbstate, &compositor.keyboards, link) {
		char *keymap = xkb_keymap_get_as_string(kbstate->keymap,
			XKB_KEYMAP_FORMAT_TEXT_V1);
		state.keymap_size = strlen(keymap);
		state.keymap_fd = os_create_anonymous_file(state.keymap_size);
		void *ptr =
			mmap(NULL, state.keymap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
				state.keymap_fd, 0);
		strcpy(ptr, keymap);
		free(keymap);
		break;
	}
	state.xwayland = wlr_xwayland_create(compositor.display,
		state.wlr_compositor);

	compositor.keyboard_key_cb = handle_keyboard_key;

	wl_display_run(compositor.display);

	wl_list_remove(&state.new_xdg_surface_v6.link);

	wlr_xwayland_destroy(state.xwayland);
	close(state.keymap_fd);
	wlr_seat_destroy(state.wl_seat);
	wlr_gamma_control_manager_destroy(state.gamma_control_manager);
	wlr_data_device_manager_destroy(state.data_device_manager);
	wlr_xdg_shell_v6_destroy(state.xdg_shell);
	wlr_wl_shell_destroy(state.wl_shell);
	wlr_compositor_destroy(state.wlr_compositor);
	wlr_renderer_destroy(state.renderer);
	compositor_fini(&compositor);
}