compositor/compositor.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <stdint.h>
  27 #include <limits.h>
  28 #include <stdarg.h>
  29 #include <assert.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/wait.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <math.h>
  35 #include <linux/input.h>
  36 #include <dlfcn.h>
  37 #include <getopt.h>
  38 #include <signal.h>
  39
  40 #include "wayland-server.h"
  41 #include "compositor.h"
  42
  43 /* The plan here is to generate a random anonymous socket name and
  44  * advertise that through a service on the session dbus.
  45  */
  46 static const char *option_socket_name = NULL;
  47 static const char *option_background = "background.png";
  48 static int option_idle_time = 300;
  49
  50 static struct wl_list child_process_list;
  51
  52 static int
  53 sigchld_handler(int signal_number, void *data)
  54 {
  55         struct wlsc_process *p;
  56         int status;
  57         pid_t pid;
  58
  59         pid = wait(&status);
  60         wl_list_for_each(p, &child_process_list, link) {
  61                 if (p->pid == pid)
  62                         break;
  63         }
  64
  65         if (&p->link == &child_process_list) {
  66                 fprintf(stderr, "unknown child process exited\n");
  67                 return 1;
  68         }
  69
  70         wl_list_remove(&p->link);
  71         p->cleanup(p, status);
  72
  73         return 1;
  74 }
  75
  76 WL_EXPORT void
  77 wlsc_watch_process(struct wlsc_process *process)
  78 {
  79         wl_list_insert(&child_process_list, &process->link);
  80 }
  81
  82 WL_EXPORT void
  83 wlsc_matrix_init(struct wlsc_matrix *matrix)
  84 {
  85         static const struct wlsc_matrix identity = {
  86                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  87         };
  88
  89         memcpy(matrix, &identity, sizeof identity);
  90 }
  91
  92 static void
  93 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  94 {
  95         struct wlsc_matrix tmp;
  96         const GLfloat *row, *column;
  97         div_t d;
  98         int i, j;
  99
 100         for (i = 0; i < 16; i++) {
 101                 tmp.d[i] = 0;
 102                 d = div(i, 4);
 103                 row = m->d + d.quot * 4;
 104                 column = n->d + d.rem;
 105                 for (j = 0; j < 4; j++)
 106                         tmp.d[i] += row[j] * column[j * 4];
 107         }
 108         memcpy(m, &tmp, sizeof tmp);
 109 }
 110
 111 WL_EXPORT void
 112 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 113 {
 114         struct wlsc_matrix translate = {
 115                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
 116         };
 117
 118         wlsc_matrix_multiply(matrix, &translate);
 119 }
 120
 121 WL_EXPORT void
 122 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 123 {
 124         struct wlsc_matrix scale = {
 125                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
 126         };
 127
 128         wlsc_matrix_multiply(matrix, &scale);
 129 }
 130
 131 static void
 132 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 133 {
 134         int i, j;
 135         struct wlsc_vector t;
 136
 137         for (i = 0; i < 4; i++) {
 138                 t.f[i] = 0;
 139                 for (j = 0; j < 4; j++)
 140                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 141         }
 142
 143         *v = t;
 144 }
 145
 146 WL_EXPORT void
 147 wlsc_spring_init(struct wlsc_spring *spring,
 148                  double k, double current, double target)
 149 {
 150         spring->k = k;
 151         spring->friction = 100.0;
 152         spring->current = current;
 153         spring->previous = current;
 154         spring->target = target;
 155 }
 156
 157 WL_EXPORT void
 158 wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec)
 159 {
 160         double force, v, current, step;
 161
 162         step = (msec - spring->timestamp) / 300.0;
 163         spring->timestamp = msec;
 164
 165         current = spring->current;
 166         v = current - spring->previous;
 167         force = spring->k * (spring->target - current) / 10.0 +
 168                 (spring->previous - current) - v * spring->friction;
 169
 170         spring->current =
 171                 current + (current - spring->previous) + force * step * step;
 172         spring->previous = current;
 173
 174 #if 0
 175         if (spring->current >= 1.0) {
 176 #ifdef TWEENER_BOUNCE
 177                 spring->current = 2.0 - spring->current;
 178                 spring->previous = 2.0 - spring->previous;
 179 #else
 180                 spring->current = 1.0;
 181                 spring->previous = 1.0;
 182 #endif
 183         }
 184
 185         if (spring->current <= 0.0) {
 186                 spring->current = 0.0;
 187                 spring->previous = 0.0;
 188         }
 189 #endif
 190 }
 191
 192 WL_EXPORT int
 193 wlsc_spring_done(struct wlsc_spring *spring)
 194 {
 195         return fabs(spring->previous - spring->target) < 0.0002 &&
 196                 fabs(spring->current - spring->target) < 0.0002;
 197 }
 198
 199 static void
 200 surface_handle_buffer_destroy(struct wl_listener *listener,
 201                               struct wl_resource *resource, uint32_t time)
 202 {
 203         struct wlsc_surface *es = container_of(listener, struct wlsc_surface,
 204                                                buffer_destroy_listener);
 205         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 206
 207         if (es->buffer == buffer)
 208                 es->buffer = NULL;
 209 }
 210
 211 static void
 212 output_handle_scanout_buffer_destroy(struct wl_listener *listener,
 213                                      struct wl_resource *resource,
 214                                      uint32_t time)
 215 {
 216         struct wlsc_output *output =
 217                 container_of(listener, struct wlsc_output,
 218                              scanout_buffer_destroy_listener);
 219         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 220
 221         if (output->scanout_buffer == buffer)
 222                 output->scanout_buffer = NULL;
 223 }
 224
 225 WL_EXPORT struct wlsc_surface *
 226 wlsc_surface_create(struct wlsc_compositor *compositor,
 227                     int32_t x, int32_t y, int32_t width, int32_t height)
 228 {
 229         struct wlsc_surface *surface;
 230
 231         surface = malloc(sizeof *surface);
 232         if (surface == NULL)
 233                 return NULL;
 234
 235         wl_list_init(&surface->link);
 236         wl_list_init(&surface->buffer_link);
 237         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 238
 239         glGenTextures(1, &surface->texture);
 240         glBindTexture(GL_TEXTURE_2D, surface->texture);
 241         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 242         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 243
 244         surface->surface.client = NULL;
 245
 246         surface->compositor = compositor;
 247         surface->visual = NULL;
 248         surface->image = EGL_NO_IMAGE_KHR;
 249         surface->saved_texture = 0;
 250         surface->x = x;
 251         surface->y = y;
 252         surface->width = width;
 253         surface->height = height;
 254
 255         surface->buffer = NULL;
 256
 257         pixman_region32_init(&surface->damage);
 258
 259         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 260         wl_list_init(&surface->buffer_destroy_listener.link);
 261
 262         surface->transform = NULL;
 263
 264         return surface;
 265 }
 266
 267 WL_EXPORT void
 268 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 269                               int32_t x, int32_t y,
 270                               int32_t width, int32_t height)
 271 {
 272         struct wlsc_compositor *compositor = surface->compositor;
 273
 274         pixman_region32_union_rect(&surface->damage,
 275                                    &surface->damage,
 276                                    surface->x + x, surface->y + y,
 277                                    width, height);
 278         wlsc_compositor_schedule_repaint(compositor);
 279 }
 280
 281 WL_EXPORT void
 282 wlsc_surface_damage(struct wlsc_surface *surface)
 283 {
 284         wlsc_surface_damage_rectangle(surface, 0, 0,
 285                                       surface->width, surface->height);
 286 }
 287
 288 WL_EXPORT void
 289 wlsc_surface_damage_below(struct wlsc_surface *surface)
 290 {
 291         struct wlsc_surface *below;
 292
 293         if (surface->link.next == &surface->compositor->surface_list)
 294                 return;
 295
 296         below = container_of(surface->link.next, struct wlsc_surface, link);
 297
 298         pixman_region32_union_rect(&below->damage,
 299                                    &below->damage,
 300                                    surface->x, surface->y,
 301                                    surface->width, surface->height);
 302         wlsc_compositor_schedule_repaint(surface->compositor);
 303 }
 304
 305 WL_EXPORT uint32_t
 306 wlsc_compositor_get_time(void)
 307 {
 308         struct timeval tv;
 309
 310         gettimeofday(&tv, NULL);
 311
 312         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 313 }
 314
 315 static void
 316 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 317 {
 318         struct wlsc_surface *surface =
 319                 container_of(resource, struct wlsc_surface, surface.resource);
 320         struct wlsc_compositor *compositor = surface->compositor;
 321
 322         wlsc_surface_damage_below(surface);
 323
 324         wl_list_remove(&surface->link);
 325         if (surface->saved_texture == 0)
 326                 glDeleteTextures(1, &surface->texture);
 327         else
 328                 glDeleteTextures(1, &surface->saved_texture);
 329
 330         if (surface->buffer)
 331                 wl_list_remove(&surface->buffer_destroy_listener.link);
 332
 333         if (surface->image != EGL_NO_IMAGE_KHR)
 334                 compositor->destroy_image(compositor->display,
 335                                           surface->image);
 336
 337         wl_list_remove(&surface->buffer_link);
 338
 339         free(surface);
 340 }
 341
 342 static void
 343 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 344 {
 345         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 346         struct wlsc_compositor *ec = es->compositor;
 347         struct wl_list *surfaces_attached_to;
 348
 349         if (es->saved_texture != 0)
 350                 es->texture = es->saved_texture;
 351
 352         glBindTexture(GL_TEXTURE_2D, es->texture);
 353
 354         if (wl_buffer_is_shm(buffer)) {
 355                 /* Unbind any EGLImage texture that may be bound, so we don't
 356                  * overwrite it.*/
 357                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 358                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 359                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 360                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 361                              es->pitch, buffer->height, 0,
 362                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 363                              wl_shm_buffer_get_data(buffer));
 364                 es->visual = buffer->visual;
 365
 366                 surfaces_attached_to = buffer->user_data;
 367
 368                 wl_list_remove(&es->buffer_link);
 369                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 370         } else {
 371                 if (es->image != EGL_NO_IMAGE_KHR)
 372                         ec->destroy_image(ec->display, es->image);
 373                 es->image = ec->create_image(ec->display, NULL,
 374                                              EGL_WAYLAND_BUFFER_WL,
 375                                              buffer, NULL);
 376
 377                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 378                 es->visual = buffer->visual;
 379                 es->pitch = es->width;
 380         }
 381 }
 382
 383 static void
 384 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 385 {
 386         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 387         struct wlsc_compositor *ec = es->compositor;
 388
 389         es->pitch = es->width;
 390         es->image = sprite->image;
 391         if (sprite->image != EGL_NO_IMAGE_KHR) {
 392                 glBindTexture(GL_TEXTURE_2D, es->texture);
 393                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 394         } else {
 395                 if (es->saved_texture == 0)
 396                         es->saved_texture = es->texture;
 397                 es->texture = sprite->texture;
 398         }
 399
 400         es->visual = sprite->visual;
 401
 402         if (es->buffer)
 403                 es->buffer = NULL;
 404 }
 405
 406 enum sprite_usage {
 407         SPRITE_USE_CURSOR = (1 << 0),
 408 };
 409
 410 static struct wlsc_sprite *
 411 create_sprite_from_png(struct wlsc_compositor *ec,
 412                        const char *filename, uint32_t usage)
 413 {
 414         uint32_t *pixels;
 415         struct wlsc_sprite *sprite;
 416         int32_t width, height;
 417         uint32_t stride;
 418
 419         pixels = wlsc_load_image(filename, &width, &height, &stride);
 420         if (pixels == NULL)
 421                 return NULL;
 422
 423         sprite = malloc(sizeof *sprite);
 424         if (sprite == NULL) {
 425                 free(pixels);
 426                 return NULL;
 427         }
 428
 429         sprite->visual = &ec->compositor.premultiplied_argb_visual;
 430         sprite->width = width;
 431         sprite->height = height;
 432         sprite->image = EGL_NO_IMAGE_KHR;
 433
 434         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 435                 sprite->image = ec->create_cursor_image(ec, width, height);
 436
 437         glGenTextures(1, &sprite->texture);
 438         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 439         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 440         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 441         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 442         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 443
 444         if (sprite->image != EGL_NO_IMAGE_KHR) {
 445                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 446                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 447                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 448         } else {
 449                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 450                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 451         }
 452
 453         free(pixels);
 454
 455         return sprite;
 456 }
 457
 458 static const struct {
 459         const char *filename;
 460         int hotspot_x, hotspot_y;
 461 } pointer_images[] = {
 462         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 463         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 464         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 465         { DATADIR "/wayland/grabbing.png",              20, 17 },
 466         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 467         { DATADIR "/wayland/left_side.png",             10, 20 },
 468         { DATADIR "/wayland/right_side.png",            30, 19 },
 469         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 470         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 471         { DATADIR "/wayland/top_side.png",              18,  8 },
 472         { DATADIR "/wayland/xterm.png",                 15, 15 }
 473 };
 474
 475 static void
 476 create_pointer_images(struct wlsc_compositor *ec)
 477 {
 478         int i, count;
 479
 480         count = ARRAY_LENGTH(pointer_images);
 481         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 482         for (i = 0; i < count; i++) {
 483                 ec->pointer_sprites[i] =
 484                         create_sprite_from_png(ec,
 485                                                pointer_images[i].filename,
 486                                                SPRITE_USE_CURSOR);
 487         }
 488 }
 489
 490 static struct wlsc_surface *
 491 background_create(struct wlsc_output *output, const char *filename)
 492 {
 493         struct wlsc_surface *background;
 494         struct wlsc_sprite *sprite;
 495
 496         background = wlsc_surface_create(output->compositor,
 497                                          output->x, output->y,
 498                                          output->current->width,
 499                                          output->current->height);
 500         if (background == NULL)
 501                 return NULL;
 502
 503         sprite = create_sprite_from_png(output->compositor, filename, 0);
 504         if (sprite == NULL) {
 505                 free(background);
 506                 return NULL;
 507         }
 508
 509         wlsc_sprite_attach(sprite, &background->surface);
 510
 511         return background;
 512 }
 513
 514 static int
 515 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 516 {
 517         struct wlsc_compositor *ec = es->compositor;
 518         GLfloat *v, inv_width, inv_height;
 519         pixman_box32_t *rectangles;
 520         unsigned int *p;
 521         int i, n;
 522
 523         rectangles = pixman_region32_rectangles(region, &n);
 524         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 525         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 526         inv_width = 1.0 / es->pitch;
 527         inv_height = 1.0 / es->height;
 528
 529         for (i = 0; i < n; i++, v += 16, p += 6) {
 530                 v[ 0] = rectangles[i].x1;
 531                 v[ 1] = rectangles[i].y1;
 532                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 533                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 534
 535                 v[ 4] = rectangles[i].x1;
 536                 v[ 5] = rectangles[i].y2;
 537                 v[ 6] = v[ 2];
 538                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 539
 540                 v[ 8] = rectangles[i].x2;
 541                 v[ 9] = rectangles[i].y1;
 542                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 543                 v[11] = v[ 3];
 544
 545                 v[12] = rectangles[i].x2;
 546                 v[13] = rectangles[i].y2;
 547                 v[14] = v[10];
 548                 v[15] = v[ 7];
 549
 550                 p[0] = i * 4 + 0;
 551                 p[1] = i * 4 + 1;
 552                 p[2] = i * 4 + 2;
 553                 p[3] = i * 4 + 2;
 554                 p[4] = i * 4 + 1;
 555                 p[5] = i * 4 + 3;
 556         }
 557
 558         return n;
 559 }
 560
 561 static void
 562 transform_vertex(struct wlsc_surface *surface,
 563                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 564 {
 565         struct wlsc_vector t;
 566
 567         t.f[0] = x;
 568         t.f[1] = y;
 569         t.f[2] = 0.0;
 570         t.f[3] = 1.0;
 571
 572         wlsc_matrix_transform(&surface->transform->matrix, &t);
 573
 574         r[ 0] = t.f[0];
 575         r[ 1] = t.f[1];
 576         r[ 2] = u;
 577         r[ 3] = v;
 578 }
 579
 580 static int
 581 texture_transformed_surface(struct wlsc_surface *es)
 582 {
 583         struct wlsc_compositor *ec = es->compositor;
 584         GLfloat *v;
 585         unsigned int *p;
 586
 587         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 588         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 589
 590         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 591         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 592         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 593         transform_vertex(es, es->x + es->width, es->y + es->height,
 594                          1.0, 1.0, &v[12]);
 595
 596         p[0] = 0;
 597         p[1] = 1;
 598         p[2] = 2;
 599         p[3] = 2;
 600         p[4] = 1;
 601         p[5] = 3;
 602
 603         return 1;
 604 }
 605
 606 static void
 607 wlsc_surface_draw(struct wlsc_surface *es,
 608                   struct wlsc_output *output, pixman_region32_t *clip)
 609 {
 610         struct wlsc_compositor *ec = es->compositor;
 611         GLfloat *v;
 612         pixman_region32_t repaint;
 613         GLint filter;
 614         int n;
 615
 616         pixman_region32_init_rect(&repaint,
 617                                   es->x, es->y, es->width, es->height);
 618         pixman_region32_intersect(&repaint, &repaint, clip);
 619         if (!pixman_region32_not_empty(&repaint))
 620                 return;
 621
 622         if (es->visual == &ec->compositor.argb_visual) {
 623                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 624                 glEnable(GL_BLEND);
 625         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 626                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 627                 glEnable(GL_BLEND);
 628         } else {
 629                 glDisable(GL_BLEND);
 630         }
 631
 632         if (es->transform == NULL) {
 633                 filter = GL_NEAREST;
 634                 n = texture_region(es, &repaint);
 635         } else {
 636                 filter = GL_LINEAR;
 637                 n = texture_transformed_surface(es);
 638         }
 639
 640         glBindTexture(GL_TEXTURE_2D, es->texture);
 641         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 642         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 643
 644         v = ec->vertices.data;
 645         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 646         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 647         glEnableVertexAttribArray(0);
 648         glEnableVertexAttribArray(1);
 649         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 650
 651         ec->vertices.size = 0;
 652         ec->indices.size = 0;
 653         pixman_region32_fini(&repaint);
 654 }
 655
 656 static void
 657 wlsc_surface_raise(struct wlsc_surface *surface)
 658 {
 659         struct wlsc_compositor *compositor = surface->compositor;
 660
 661         wl_list_remove(&surface->link);
 662         wl_list_insert(&compositor->surface_list, &surface->link);
 663 }
 664
 665 WL_EXPORT void
 666 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 667 {
 668         struct wlsc_output *output;
 669
 670         wl_list_for_each(output, &compositor->output_list, link)
 671                 wlsc_output_damage(output);
 672 }
 673
 674 static inline void
 675 wlsc_buffer_post_release(struct wl_buffer *buffer)
 676 {
 677         if (buffer == NULL || --buffer->busy_count > 0)
 678                 return;
 679
 680         assert(buffer->client != NULL);
 681         wl_client_post_event(buffer->client,
 682                              &buffer->resource.object,
 683                              WL_BUFFER_RELEASE);
 684 }
 685
 686 WL_EXPORT void
 687 wlsc_output_damage(struct wlsc_output *output)
 688 {
 689         struct wlsc_compositor *compositor = output->compositor;
 690
 691         pixman_region32_union(&compositor->damage,
 692                               &compositor->damage, &output->region);
 693         wlsc_compositor_schedule_repaint(compositor);
 694 }
 695
 696 static void
 697 fade_frame(struct wlsc_animation *animation,
 698            struct wlsc_output *output, uint32_t msecs)
 699 {
 700         struct wlsc_compositor *compositor =
 701                 container_of(animation,
 702                              struct wlsc_compositor, fade.animation);
 703
 704         wlsc_spring_update(&compositor->fade.spring, msecs);
 705         if (wlsc_spring_done(&compositor->fade.spring)) {
 706                 if (compositor->fade.spring.current > 0.999) {
 707                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 708                         compositor->shell->lock(compositor->shell);
 709                 }
 710                 compositor->fade.spring.current =
 711                         compositor->fade.spring.target;
 712                 wl_list_remove(&animation->link);
 713                 wl_list_init(&animation->link);
 714         }
 715
 716         wlsc_output_damage(output);
 717 }
 718
 719 static void
 720 fade_output(struct wlsc_output *output,
 721             GLfloat tint, pixman_region32_t *region)
 722 {
 723         struct wlsc_compositor *compositor = output->compositor;
 724         struct wlsc_surface surface;
 725         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 726
 727         surface.compositor = compositor;
 728         surface.x = output->x;
 729         surface.y = output->y;
 730         surface.width = output->current->width;
 731         surface.height = output->current->height;
 732         surface.texture = GL_NONE;
 733         surface.transform = NULL;
 734
 735         if (tint <= 1.0)
 736                 surface.visual =
 737                         &compositor->compositor.premultiplied_argb_visual;
 738         else
 739                 surface.visual = &compositor->compositor.rgb_visual;
 740
 741         glUseProgram(compositor->solid_shader.program);
 742         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 743                            1, GL_FALSE, output->matrix.d);
 744         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 745         wlsc_surface_draw(&surface, output, region);
 746 }
 747
 748 static void
 749 wlsc_output_repaint(struct wlsc_output *output)
 750 {
 751         struct wlsc_compositor *ec = output->compositor;
 752         struct wlsc_surface *es;
 753         struct wlsc_input_device *device;
 754         pixman_region32_t clip, new_damage, total_damage, region;
 755
 756         output->prepare_render(output);
 757
 758         glViewport(0, 0, output->current->width, output->current->height);
 759
 760         glUseProgram(ec->texture_shader.program);
 761         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 762                            1, GL_FALSE, output->matrix.d);
 763         glUniform1i(ec->texture_shader.tex_uniform, 0);
 764
 765         pixman_region32_init(&new_damage);
 766         pixman_region32_intersect(&new_damage, &ec->damage, &output->region);
 767         pixman_region32_init(&clip);
 768         pixman_region32_copy(&clip, &output->region);
 769         wl_list_for_each(es, &ec->surface_list, link) {
 770                 pixman_region32_intersect(&es->damage, &es->damage, &clip);
 771                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 772                 if (es->visual == &ec->compositor.rgb_visual) {
 773                         pixman_region32_init_rect(&region, es->x, es->y, es->width, es->height);
 774                         pixman_region32_subtract(&clip, &clip, &region);
 775                         pixman_region32_fini(&region);
 776                 }
 777
 778         }
 779
 780         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 781         pixman_region32_init(&total_damage);
 782         pixman_region32_union(&total_damage, &new_damage,
 783                               &output->previous_damage);
 784         pixman_region32_copy(&output->previous_damage, &new_damage);
 785
 786         device = (struct wlsc_input_device *) ec->input_device;
 787         if (ec->focus && ec->fade.spring.current < 0.001) {
 788                 if (!wl_list_empty(&device->sprite->link)) {
 789                         wl_list_remove(&device->sprite->link);
 790                         wl_list_init(&device->sprite->link);
 791                 }
 792                 if (output->set_hardware_cursor(output, device) < 0)
 793                         wl_list_insert(&ec->surface_list,
 794                                        &device->sprite->link);
 795         } else {
 796                 output->set_hardware_cursor(output, NULL);
 797                 if (wl_list_empty(&device->sprite->link))
 798                         wl_list_insert(&ec->surface_list,
 799                                        &device->sprite->link);
 800         }
 801
 802         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 803
 804         if (es->visual == &ec->compositor.rgb_visual &&
 805             output->prepare_scanout_surface(output, es) == 0) {
 806                 /* We're drawing nothing now,
 807                  * draw the damaged regions later. */
 808                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 809
 810                 output->scanout_buffer = es->buffer;
 811                 output->scanout_buffer->busy_count++;
 812
 813                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 814                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 815                                &output->scanout_buffer_destroy_listener.link);
 816
 817                 return;
 818         }
 819
 820         if (es->fullscreen_output == output) {
 821                 if (es->width < output->current->width ||
 822                     es->height < output->current->height)
 823                         glClear(GL_COLOR_BUFFER_BIT);
 824                 wlsc_surface_draw(es, output, &total_damage);
 825         } else {
 826                 glUseProgram(ec->texture_shader.program);
 827                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 828                         if (ec->overlay == es)
 829                                 continue;
 830
 831                         wlsc_surface_draw(es, output, &total_damage);
 832                 }
 833         }
 834
 835         if (ec->overlay)
 836                 wlsc_surface_draw(ec->overlay, output, &total_damage);
 837
 838         if (ec->fade.spring.current > 0.001)
 839                 fade_output(output, ec->fade.spring.current, &total_damage);
 840 }
 841
 842 static void
 843 repaint(void *data, int msecs)
 844 {
 845         struct wlsc_output *output = data;
 846         struct wlsc_compositor *compositor = output->compositor;
 847         struct wlsc_surface *es;
 848         struct wlsc_animation *animation, *next;
 849
 850         wlsc_output_repaint(output);
 851         output->repaint_needed = 0;
 852         output->repaint_scheduled = 1;
 853         output->present(output);
 854
 855         /* FIXME: Keep the surfaces in an per-output list. */
 856         wl_list_for_each(es, &compositor->surface_list, link) {
 857                 if (es->output == output) {
 858                         wl_display_post_frame(compositor->wl_display,
 859                                               &es->surface, msecs);
 860                 }
 861         }
 862
 863         wl_list_for_each_safe(animation, next,
 864                               &compositor->animation_list, link)
 865                 animation->frame(animation, output, msecs);
 866 }
 867
 868 static void
 869 idle_repaint(void *data)
 870 {
 871         repaint(data, wlsc_compositor_get_time());
 872 }
 873
 874 WL_EXPORT void
 875 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 876 {
 877         wlsc_buffer_post_release(output->scanout_buffer);
 878         output->scanout_buffer = NULL;
 879         output->repaint_scheduled = 0;
 880
 881         if (output->repaint_needed)
 882                 repaint(output, msecs);
 883 }
 884
 885 WL_EXPORT void
 886 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 887 {
 888         struct wlsc_output *output;
 889         struct wl_event_loop *loop;
 890
 891         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 892                 return;
 893
 894         loop = wl_display_get_event_loop(compositor->wl_display);
 895         wl_list_for_each(output, &compositor->output_list, link) {
 896                 output->repaint_needed = 1;
 897                 if (output->repaint_scheduled)
 898                         continue;
 899
 900                 wl_event_loop_add_idle(loop, idle_repaint, output);
 901                 output->repaint_scheduled = 1;
 902         }
 903 }
 904
 905 WL_EXPORT void
 906 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 907 {
 908         int done;
 909
 910         done = wlsc_spring_done(&compositor->fade.spring);
 911         compositor->fade.spring.target = tint;
 912         if (wlsc_spring_done(&compositor->fade.spring))
 913                 return;
 914
 915         if (done)
 916                 compositor->fade.spring.timestamp =
 917                         wlsc_compositor_get_time();
 918
 919         wlsc_compositor_damage_all(compositor);
 920         if (wl_list_empty(&compositor->fade.animation.link))
 921                 wl_list_insert(compositor->animation_list.prev,
 922                                &compositor->fade.animation.link);
 923 }
 924
 925 static void
 926 surface_destroy(struct wl_client *client,
 927                 struct wl_surface *surface)
 928 {
 929         wl_resource_destroy(&surface->resource, client,
 930                             wlsc_compositor_get_time());
 931 }
 932
 933 WL_EXPORT void
 934 wlsc_surface_assign_output(struct wlsc_surface *es)
 935 {
 936         struct wlsc_compositor *ec = es->compositor;
 937         struct wlsc_output *output;
 938
 939         struct wlsc_output *tmp = es->output;
 940         es->output = NULL;
 941
 942         wl_list_for_each(output, &ec->output_list, link) {
 943                 if (pixman_region32_contains_point(&output->region,
 944                                                    es->x, es->y, NULL)) {
 945                         if (output != tmp)
 946                                 printf("assiging surface %p to output %p\n",
 947                                        es, output);
 948                         es->output = output;
 949                 }
 950         }
 951
 952         if (es->output == NULL) {
 953                 printf("no output found\n");
 954                 es->output = container_of(ec->output_list.next,
 955                                           struct wlsc_output, link);
 956         }
 957 }
 958
 959 static void
 960 surface_attach(struct wl_client *client,
 961                struct wl_surface *surface, struct wl_buffer *buffer,
 962                int32_t x, int32_t y)
 963 {
 964         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 965
 966         /* FIXME: This damages the entire old surface, but we should
 967          * really just damage the part that's no longer covered by the
 968          * surface.  Anything covered by the new surface will be
 969          * damaged by the client. */
 970         if (es->buffer)
 971                 wlsc_surface_damage_below(es);
 972
 973         buffer->busy_count++;
 974         wlsc_buffer_post_release(es->buffer);
 975
 976         es->buffer = buffer;
 977         wl_list_remove(&es->buffer_destroy_listener.link);
 978         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 979                        &es->buffer_destroy_listener.link);
 980
 981         es->x += x;
 982         es->y += y;
 983         es->width = buffer->width;
 984         es->height = buffer->height;
 985         if (x != 0 || y != 0)
 986                 wlsc_surface_assign_output(es);
 987         if (es->visual == NULL)
 988                 wl_list_insert(&es->compositor->surface_list, &es->link);
 989
 990         wlsc_buffer_attach(buffer, surface);
 991
 992         es->compositor->shell->attach(es->compositor->shell, es);
 993 }
 994
 995 static void
 996 surface_damage(struct wl_client *client,
 997                struct wl_surface *surface,
 998                int32_t x, int32_t y, int32_t width, int32_t height)
 999 {
1000         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1001
1002         wlsc_surface_damage_rectangle(es, x, y, width, height);
1003 }
1004
1005 const static struct wl_surface_interface surface_interface = {
1006         surface_destroy,
1007         surface_attach,
1008         surface_damage
1009 };
1010
1011 static void
1012 wlsc_input_device_attach(struct wlsc_input_device *device,
1013                          int x, int y, int width, int height)
1014 {
1015         wlsc_surface_damage_below(device->sprite);
1016
1017         device->hotspot_x = x;
1018         device->hotspot_y = y;
1019
1020         device->sprite->x = device->input_device.x - device->hotspot_x;
1021         device->sprite->y = device->input_device.y - device->hotspot_y;
1022         device->sprite->width = width;
1023         device->sprite->height = height;
1024
1025         wlsc_surface_damage(device->sprite);
1026 }
1027
1028 static void
1029 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1030                                 struct wl_buffer *buffer, int x, int y)
1031 {
1032         wlsc_buffer_attach(buffer, &device->sprite->surface);
1033         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1034 }
1035
1036 static void
1037 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1038                                 struct wlsc_sprite *sprite, int x, int y)
1039 {
1040         wlsc_sprite_attach(sprite, &device->sprite->surface);
1041         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1042 }
1043
1044 WL_EXPORT void
1045 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1046                                     enum wlsc_pointer_type type)
1047 {
1048         struct wlsc_compositor *compositor =
1049                 (struct wlsc_compositor *) device->input_device.compositor;
1050
1051         wlsc_input_device_attach_sprite(device,
1052                                         compositor->pointer_sprites[type],
1053                                         pointer_images[type].hotspot_x,
1054                                         pointer_images[type].hotspot_y);
1055 }
1056
1057 static void
1058 compositor_create_surface(struct wl_client *client,
1059                           struct wl_compositor *compositor, uint32_t id)
1060 {
1061         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1062         struct wlsc_surface *surface;
1063
1064         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1065         if (surface == NULL) {
1066                 wl_client_post_no_memory(client);
1067                 return;
1068         }
1069
1070         surface->surface.resource.destroy = destroy_surface;
1071
1072         surface->surface.resource.object.id = id;
1073         surface->surface.resource.object.interface = &wl_surface_interface;
1074         surface->surface.resource.object.implementation =
1075                 (void (**)(void)) &surface_interface;
1076         surface->surface.client = client;
1077
1078         wl_client_add_resource(client, &surface->surface.resource);
1079 }
1080
1081 const static struct wl_compositor_interface compositor_interface = {
1082         compositor_create_surface,
1083 };
1084
1085 static void
1086 wlsc_surface_transform(struct wlsc_surface *surface,
1087                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1088 {
1089         *sx = x - surface->x;
1090         *sy = y - surface->y;
1091 }
1092
1093 WL_EXPORT struct wlsc_surface *
1094 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1095 {
1096         struct wlsc_compositor *ec =
1097                 (struct wlsc_compositor *) device->compositor;
1098         struct wlsc_surface *es;
1099
1100         wl_list_for_each(es, &ec->surface_list, link) {
1101                 if (es->surface.client == NULL)
1102                         continue;
1103                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1104                 if (0 <= *sx && *sx < es->width &&
1105                     0 <= *sy && *sy < es->height)
1106                         return es;
1107         }
1108
1109         return NULL;
1110 }
1111
1112
1113 static void
1114 motion_grab_motion(struct wl_grab *grab,
1115                    uint32_t time, int32_t x, int32_t y)
1116 {
1117         struct wlsc_input_device *device =
1118                 (struct wlsc_input_device *) grab->input_device;
1119         struct wlsc_surface *es =
1120                 (struct wlsc_surface *) device->input_device.pointer_focus;
1121         int32_t sx, sy;
1122
1123         wlsc_surface_transform(es, x, y, &sx, &sy);
1124         wl_client_post_event(es->surface.client,
1125                              &device->input_device.object,
1126                              WL_INPUT_DEVICE_MOTION,
1127                              time, x, y, sx, sy);
1128 }
1129
1130 static void
1131 motion_grab_button(struct wl_grab *grab,
1132                    uint32_t time, int32_t button, int32_t state)
1133 {
1134         wl_client_post_event(grab->input_device->pointer_focus->client,
1135                              &grab->input_device->object,
1136                              WL_INPUT_DEVICE_BUTTON,
1137                              time, button, state);
1138 }
1139
1140 static void
1141 motion_grab_end(struct wl_grab *grab, uint32_t time)
1142 {
1143 }
1144
1145 static const struct wl_grab_interface motion_grab_interface = {
1146         motion_grab_motion,
1147         motion_grab_button,
1148         motion_grab_end
1149 };
1150
1151 WL_EXPORT void
1152 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1153 {
1154         if (compositor->idle_inhibit)
1155                 return;
1156
1157         wlsc_compositor_fade(compositor, 0.0);
1158         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1159
1160         wl_event_source_timer_update(compositor->idle_source,
1161                                      option_idle_time * 1000);
1162 }
1163
1164 static void
1165 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1166 {
1167         wlsc_compositor_wake(compositor);
1168         compositor->idle_inhibit++;
1169 }
1170
1171 static void
1172 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1173 {
1174         compositor->idle_inhibit--;
1175         wlsc_compositor_wake(compositor);
1176 }
1177
1178 static int
1179 idle_handler(void *data)
1180 {
1181         struct wlsc_compositor *compositor = data;
1182
1183         if (compositor->idle_inhibit)
1184                 return 1;
1185
1186         wlsc_compositor_fade(compositor, 1.0);
1187
1188         return 1;
1189 }
1190
1191 WL_EXPORT void
1192 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1193 {
1194         struct wlsc_surface *es;
1195         struct wlsc_compositor *ec =
1196                 (struct wlsc_compositor *) device->compositor;
1197         struct wlsc_output *output;
1198         const struct wl_grab_interface *interface;
1199         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1200         int32_t sx, sy;
1201         int x_valid = 0, y_valid = 0;
1202         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1203
1204         wlsc_compositor_wake(ec);
1205
1206         wl_list_for_each(output, &ec->output_list, link) {
1207                 if (output->x <= x && x <= output->x + output->current->width)
1208                         x_valid = 1;
1209
1210                 if (output->y <= y && y <= output->y + output->current->height)
1211                         y_valid = 1;
1212
1213                 /* FIXME: calculate this only on output addition/deletion */
1214                 if (output->x < min_x)
1215                         min_x = output->x;
1216                 if (output->y < min_y)
1217                         min_y = output->y;
1218
1219                 if (output->x + output->current->width > max_x)
1220                         max_x = output->x + output->current->width;
1221                 if (output->y + output->current->height > max_y)
1222                         max_y = output->y + output->current->height;
1223         }
1224
1225         if (!x_valid) {
1226                 if (x < min_x)
1227                         x = min_x;
1228                 else if (x >= max_x)
1229                         x = max_x;
1230         }
1231         if (!y_valid) {
1232                 if (y < min_y)
1233                         y = min_y;
1234                 else  if (y >= max_y)
1235                         y = max_y;
1236         }
1237
1238         device->x = x;
1239         device->y = y;
1240
1241         if (device->grab) {
1242                 interface = device->grab->interface;
1243                 interface->motion(device->grab, time, x, y);
1244         } else {
1245                 es = pick_surface(device, &sx, &sy);
1246                 wl_input_device_set_pointer_focus(device,
1247                                                   &es->surface,
1248                                                   time, x, y, sx, sy);
1249                 if (es)
1250                         wl_client_post_event(es->surface.client,
1251                                              &device->object,
1252                                              WL_INPUT_DEVICE_MOTION,
1253                                              time, x, y, sx, sy);
1254         }
1255
1256         wlsc_surface_damage_below(wd->sprite);
1257
1258         wd->sprite->x = device->x - wd->hotspot_x;
1259         wd->sprite->y = device->y - wd->hotspot_y;
1260
1261         wlsc_surface_damage(wd->sprite);
1262 }
1263
1264 WL_EXPORT void
1265 wlsc_surface_activate(struct wlsc_surface *surface,
1266                       struct wlsc_input_device *device, uint32_t time)
1267 {
1268         struct wlsc_shell *shell = surface->compositor->shell;
1269
1270         wlsc_surface_raise(surface);
1271         if (device->selection)
1272                 shell->set_selection_focus(shell,
1273                                            device->selection,
1274                                            &surface->surface, time);
1275
1276         wl_input_device_set_keyboard_focus(&device->input_device,
1277                                            &surface->surface,
1278                                            time);
1279 }
1280
1281 struct wlsc_binding {
1282         uint32_t key;
1283         uint32_t button;
1284         uint32_t modifier;
1285         wlsc_binding_handler_t handler;
1286         void *data;
1287         struct wl_list link;
1288 };
1289
1290 WL_EXPORT void
1291 notify_button(struct wl_input_device *device,
1292               uint32_t time, int32_t button, int32_t state)
1293 {
1294         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1295         struct wlsc_compositor *compositor =
1296                 (struct wlsc_compositor *) device->compositor;
1297         struct wlsc_binding *b;
1298         struct wlsc_surface *surface =
1299                 (struct wlsc_surface *) device->pointer_focus;
1300
1301         if (state)
1302                 wlsc_compositor_idle_inhibit(compositor);
1303         else
1304                 wlsc_compositor_idle_release(compositor);
1305
1306         if (state && surface && device->grab == NULL) {
1307                 wlsc_surface_activate(surface, wd, time);
1308                 wl_input_device_start_grab(device,
1309                                            &device->motion_grab,
1310                                            button, time);
1311         }
1312
1313         wl_list_for_each(b, &compositor->binding_list, link) {
1314                 if (b->button == button &&
1315                     b->modifier == wd->modifier_state && state) {
1316                         b->handler(&wd->input_device,
1317                                    time, 0, button, state, b->data);
1318                         break;
1319                 }
1320         }
1321
1322         if (device->grab)
1323                 device->grab->interface->button(device->grab, time,
1324                                                 button, state);
1325
1326         if (!state && device->grab && device->grab_button == button)
1327                 wl_input_device_end_grab(device, time);
1328 }
1329
1330 static void
1331 terminate_binding(struct wl_input_device *device, uint32_t time,
1332                   uint32_t key, uint32_t button, uint32_t state, void *data)
1333 {
1334         struct wlsc_compositor *compositor = data;
1335
1336         if (state)
1337                 wl_display_terminate(compositor->wl_display);
1338 }
1339
1340 WL_EXPORT struct wlsc_binding *
1341 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1342                             uint32_t key, uint32_t button, uint32_t modifier,
1343                             wlsc_binding_handler_t handler, void *data)
1344 {
1345         struct wlsc_binding *binding;
1346
1347         binding = malloc(sizeof *binding);
1348         if (binding == NULL)
1349                 return NULL;
1350
1351         binding->key = key;
1352         binding->button = button;
1353         binding->modifier = modifier;
1354         binding->handler = handler;
1355         binding->data = data;
1356         wl_list_insert(compositor->binding_list.prev, &binding->link);
1357
1358         return binding;
1359 }
1360
1361 WL_EXPORT void
1362 wlsc_binding_destroy(struct wlsc_binding *binding)
1363 {
1364         wl_list_remove(&binding->link);
1365         free(binding);
1366 }
1367
1368 static void
1369 update_modifier_state(struct wlsc_input_device *device,
1370                       uint32_t key, uint32_t state)
1371 {
1372         uint32_t modifier;
1373
1374         switch (key) {
1375         case KEY_LEFTCTRL:
1376         case KEY_RIGHTCTRL:
1377                 modifier = MODIFIER_CTRL;
1378                 break;
1379
1380         case KEY_LEFTALT:
1381         case KEY_RIGHTALT:
1382                 modifier = MODIFIER_ALT;
1383                 break;
1384
1385         case KEY_LEFTMETA:
1386         case KEY_RIGHTMETA:
1387                 modifier = MODIFIER_SUPER;
1388                 break;
1389
1390         default:
1391                 modifier = 0;
1392                 break;
1393         }
1394
1395         if (state)
1396                 device->modifier_state |= modifier;
1397         else
1398                 device->modifier_state &= ~modifier;
1399 }
1400
1401 WL_EXPORT void
1402 notify_key(struct wl_input_device *device,
1403            uint32_t time, uint32_t key, uint32_t state)
1404 {
1405         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1406         struct wlsc_compositor *compositor =
1407                 (struct wlsc_compositor *) device->compositor;
1408         uint32_t *k, *end;
1409         struct wlsc_binding *b;
1410
1411         if (state)
1412                 wlsc_compositor_idle_inhibit(compositor);
1413         else
1414                 wlsc_compositor_idle_release(compositor);
1415
1416         wl_list_for_each(b, &compositor->binding_list, link) {
1417                 if (b->key == key &&
1418                     b->modifier == wd->modifier_state) {
1419                         b->handler(&wd->input_device,
1420                                    time, key, 0, state, b->data);
1421                         break;
1422                 }
1423         }
1424
1425         update_modifier_state(wd, key, state);
1426         end = device->keys.data + device->keys.size;
1427         for (k = device->keys.data; k < end; k++) {
1428                 if (*k == key)
1429                         *k = *--end;
1430         }
1431         device->keys.size = (void *) end - device->keys.data;
1432         if (state) {
1433                 k = wl_array_add(&device->keys, sizeof *k);
1434                 *k = key;
1435         }
1436
1437         if (device->keyboard_focus != NULL)
1438                 wl_client_post_event(device->keyboard_focus->client,
1439                                      &device->object,
1440                                      WL_INPUT_DEVICE_KEY, time, key, state);
1441 }
1442
1443 WL_EXPORT void
1444 notify_pointer_focus(struct wl_input_device *device,
1445                      uint32_t time, struct wlsc_output *output,
1446                      int32_t x, int32_t y)
1447 {
1448         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1449         struct wlsc_compositor *compositor =
1450                 (struct wlsc_compositor *) device->compositor;
1451         struct wlsc_surface *es;
1452         int32_t sx, sy;
1453
1454         if (output) {
1455                 device->x = x;
1456                 device->y = y;
1457                 es = pick_surface(device, &sx, &sy);
1458                 wl_input_device_set_pointer_focus(device,
1459                                                   &es->surface,
1460                                                   time, x, y, sx, sy);
1461
1462                 compositor->focus = 1;
1463
1464                 wd->sprite->x = device->x - wd->hotspot_x;
1465                 wd->sprite->y = device->y - wd->hotspot_y;
1466         } else {
1467                 wl_input_device_set_pointer_focus(device, NULL,
1468                                                   time, 0, 0, 0, 0);
1469                 compositor->focus = 0;
1470         }
1471
1472         wlsc_surface_damage(wd->sprite);
1473 }
1474
1475 WL_EXPORT void
1476 notify_keyboard_focus(struct wl_input_device *device,
1477                       uint32_t time, struct wlsc_output *output,
1478                       struct wl_array *keys)
1479 {
1480         struct wlsc_input_device *wd =
1481                 (struct wlsc_input_device *) device;
1482         struct wlsc_compositor *compositor =
1483                 (struct wlsc_compositor *) device->compositor;
1484         struct wlsc_surface *es;
1485         uint32_t *k, *end;
1486
1487         if (!wl_list_empty(&compositor->surface_list))
1488                 es = container_of(compositor->surface_list.next,
1489                                   struct wlsc_surface, link);
1490         else
1491                 es = NULL;
1492
1493         if (output) {
1494                 wl_array_copy(&wd->input_device.keys, keys);
1495                 wd->modifier_state = 0;
1496                 end = device->keys.data + device->keys.size;
1497                 for (k = device->keys.data; k < end; k++) {
1498                         wlsc_compositor_idle_inhibit(compositor);
1499                         update_modifier_state(wd, *k, 1);
1500                 }
1501
1502                 if (es->surface.client)
1503                         wl_input_device_set_keyboard_focus(&wd->input_device,
1504                                                            &es->surface, time);
1505         } else {
1506                 end = device->keys.data + device->keys.size;
1507                 for (k = device->keys.data; k < end; k++)
1508                         wlsc_compositor_idle_release(compositor);
1509
1510                 wd->modifier_state = 0;
1511                 wl_input_device_set_keyboard_focus(&wd->input_device,
1512                                                    NULL, time);
1513         }
1514 }
1515
1516
1517 static void
1518 input_device_attach(struct wl_client *client,
1519                     struct wl_input_device *device_base,
1520                     uint32_t time,
1521                     struct wl_buffer *buffer, int32_t x, int32_t y)
1522 {
1523         struct wlsc_input_device *device =
1524                 (struct wlsc_input_device *) device_base;
1525
1526         if (time < device->input_device.pointer_focus_time)
1527                 return;
1528         if (device->input_device.pointer_focus == NULL)
1529                 return;
1530         if (device->input_device.pointer_focus->client != client)
1531                 return;
1532
1533         if (buffer == NULL) {
1534                 wlsc_input_device_set_pointer_image(device,
1535                                                     WLSC_POINTER_LEFT_PTR);
1536                 return;
1537         }
1538
1539         wlsc_input_device_attach_buffer(device, buffer, x, y);
1540 }
1541
1542 const static struct wl_input_device_interface input_device_interface = {
1543         input_device_attach,
1544 };
1545
1546 WL_EXPORT void
1547 wlsc_input_device_init(struct wlsc_input_device *device,
1548                        struct wlsc_compositor *ec)
1549 {
1550         wl_input_device_init(&device->input_device, &ec->compositor);
1551
1552         device->input_device.object.interface = &wl_input_device_interface;
1553         device->input_device.object.implementation =
1554                 (void (**)(void)) &input_device_interface;
1555         wl_display_add_object(ec->wl_display, &device->input_device.object);
1556         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1557
1558         device->sprite = wlsc_surface_create(ec,
1559                                              device->input_device.x,
1560                                              device->input_device.y, 32, 32);
1561         wl_list_insert(&ec->surface_list, &device->sprite->link);
1562
1563         device->hotspot_x = 16;
1564         device->hotspot_y = 16;
1565         device->modifier_state = 0;
1566
1567         device->input_device.motion_grab.interface = &motion_grab_interface;
1568
1569         wl_list_insert(ec->input_device_list.prev, &device->link);
1570
1571         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1572 }
1573
1574 static void
1575 wlsc_output_post_geometry(struct wl_client *client,
1576                           struct wl_object *global, uint32_t version)
1577 {
1578         struct wlsc_output *output =
1579                 container_of(global, struct wlsc_output, object);
1580         struct wlsc_mode *mode;
1581
1582         wl_client_post_event(client, global,
1583                              WL_OUTPUT_GEOMETRY,
1584                              output->x,
1585                              output->y,
1586                              output->mm_width,
1587                              output->mm_height,
1588                              output->subpixel,
1589                              output->make, output->model);
1590
1591         wl_list_for_each (mode, &output->mode_list, link) {
1592                 wl_client_post_event(client, global,
1593                                      WL_OUTPUT_MODE,
1594                                      mode->flags,
1595                                      mode->width, mode->height, mode->refresh);
1596         }
1597 }
1598
1599 static const char vertex_shader[] =
1600         "uniform mat4 proj;\n"
1601         "attribute vec2 position;\n"
1602         "attribute vec2 texcoord;\n"
1603         "varying vec2 v_texcoord;\n"
1604         "void main()\n"
1605         "{\n"
1606         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1607         "   v_texcoord = texcoord;\n"
1608         "}\n";
1609
1610 static const char texture_fragment_shader[] =
1611         "precision mediump float;\n"
1612         "varying vec2 v_texcoord;\n"
1613         "uniform sampler2D tex;\n"
1614         "void main()\n"
1615         "{\n"
1616         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1617         "}\n";
1618
1619 static const char solid_fragment_shader[] =
1620         "precision mediump float;\n"
1621         "uniform vec4 color;\n"
1622         "void main()\n"
1623         "{\n"
1624         "   gl_FragColor = color\n;"
1625         "}\n";
1626
1627 static int
1628 compile_shader(GLenum type, const char *source)
1629 {
1630         GLuint s;
1631         char msg[512];
1632         GLint status;
1633
1634         s = glCreateShader(type);
1635         glShaderSource(s, 1, &source, NULL);
1636         glCompileShader(s);
1637         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1638         if (!status) {
1639                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1640                 fprintf(stderr, "shader info: %s\n", msg);
1641                 return GL_NONE;
1642         }
1643
1644         return s;
1645 }
1646
1647 static int
1648 wlsc_shader_init(struct wlsc_shader *shader,
1649                  const char *vertex_source, const char *fragment_source)
1650 {
1651         char msg[512];
1652         GLint status;
1653
1654         shader->vertex_shader =
1655                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1656         shader->fragment_shader =
1657                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1658
1659         shader->program = glCreateProgram();
1660         glAttachShader(shader->program, shader->vertex_shader);
1661         glAttachShader(shader->program, shader->fragment_shader);
1662         glBindAttribLocation(shader->program, 0, "position");
1663         glBindAttribLocation(shader->program, 1, "texcoord");
1664
1665         glLinkProgram(shader->program);
1666         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1667         if (!status) {
1668                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1669                 fprintf(stderr, "link info: %s\n", msg);
1670                 return -1;
1671         }
1672
1673         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1674         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1675
1676         return 0;
1677 }
1678
1679 static int
1680 init_solid_shader(struct wlsc_shader *shader,
1681                   GLuint vertex_shader, const char *fragment_source)
1682 {
1683         GLint status;
1684         char msg[512];
1685
1686         shader->vertex_shader = vertex_shader;
1687         shader->fragment_shader =
1688                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1689
1690         shader->program = glCreateProgram();
1691         glAttachShader(shader->program, shader->vertex_shader);
1692         glAttachShader(shader->program, shader->fragment_shader);
1693         glBindAttribLocation(shader->program, 0, "position");
1694         glBindAttribLocation(shader->program, 1, "texcoord");
1695
1696         glLinkProgram(shader->program);
1697         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1698         if (!status) {
1699                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1700                 fprintf(stderr, "link info: %s\n", msg);
1701                 return -1;
1702         }
1703
1704         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1705         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1706
1707         return 0;
1708 }
1709
1710 WL_EXPORT void
1711 wlsc_output_destroy(struct wlsc_output *output)
1712 {
1713         pixman_region32_fini(&output->region);
1714         pixman_region32_fini(&output->previous_damage);
1715         destroy_surface(&output->background->surface.resource, NULL);
1716 }
1717
1718 WL_EXPORT void
1719 wlsc_output_move(struct wlsc_output *output, int x, int y)
1720 {
1721         struct wlsc_compositor *c = output->compositor;
1722         int flip;
1723
1724         output->x = x;
1725         output->y = y;
1726
1727         if (output->background) {
1728                 output->background->x = x;
1729                 output->background->y = y;
1730         }
1731
1732         pixman_region32_init(&output->previous_damage);
1733         pixman_region32_init_rect(&output->region, x, y,
1734                                   output->current->width,
1735                                   output->current->height);
1736
1737         wlsc_matrix_init(&output->matrix);
1738         wlsc_matrix_translate(&output->matrix,
1739                               -output->x - output->current->width / 2.0,
1740                               -output->y - output->current->height / 2.0, 0);
1741
1742         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1743         wlsc_matrix_scale(&output->matrix,
1744                           2.0 / output->current->width,
1745                           flip * 2.0 / output->current->height, 1);
1746
1747         pixman_region32_union(&c->damage, &c->damage, &output->region);
1748 }
1749
1750 WL_EXPORT void
1751 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1752                  int x, int y, int width, int height, uint32_t flags)
1753 {
1754         output->compositor = c;
1755         output->x = x;
1756         output->y = y;
1757         output->mm_width = width;
1758         output->mm_height = height;
1759
1760         output->background =
1761                 background_create(output, option_background);
1762
1763         if (output->background != NULL)
1764                 wl_list_insert(c->surface_list.prev,
1765                                &output->background->link);
1766
1767         output->flags = flags;
1768         wlsc_output_move(output, x, y);
1769
1770         output->scanout_buffer_destroy_listener.func =
1771                 output_handle_scanout_buffer_destroy;
1772         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1773
1774         output->object.interface = &wl_output_interface;
1775         wl_display_add_object(c->wl_display, &output->object);
1776         wl_display_add_global(c->wl_display, &output->object,
1777                               wlsc_output_post_geometry);
1778 }
1779
1780 static void
1781 shm_buffer_created(struct wl_buffer *buffer)
1782 {
1783         struct wl_list *surfaces_attached_to;
1784
1785         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1786         if (!surfaces_attached_to) {
1787                 buffer->user_data = NULL;
1788                 return;
1789         }
1790
1791         wl_list_init(surfaces_attached_to);
1792
1793         buffer->user_data = surfaces_attached_to;
1794 }
1795
1796 static void
1797 shm_buffer_damaged(struct wl_buffer *buffer,
1798                    int32_t x, int32_t y, int32_t width, int32_t height)
1799 {
1800         struct wl_list *surfaces_attached_to = buffer->user_data;
1801         struct wlsc_surface *es;
1802         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1803
1804         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1805                 glBindTexture(GL_TEXTURE_2D, es->texture);
1806                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1807                              tex_width, buffer->height, 0,
1808                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1809                              wl_shm_buffer_get_data(buffer));
1810                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1811                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1812         }
1813 }
1814
1815 static void
1816 shm_buffer_destroyed(struct wl_buffer *buffer)
1817 {
1818         struct wl_list *surfaces_attached_to = buffer->user_data;
1819         struct wlsc_surface *es, *next;
1820
1821         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1822                 wl_list_remove(&es->buffer_link);
1823                 wl_list_init(&es->buffer_link);
1824         }
1825
1826         free(surfaces_attached_to);
1827 }
1828
1829 const static struct wl_shm_callbacks shm_callbacks = {
1830         shm_buffer_created,
1831         shm_buffer_damaged,
1832         shm_buffer_destroyed
1833 };
1834
1835 WL_EXPORT int
1836 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1837 {
1838         struct wl_event_loop *loop;
1839         const char *extensions;
1840
1841         ec->wl_display = display;
1842
1843         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1844
1845         ec->shm = wl_shm_init(display, &shm_callbacks);
1846
1847         ec->image_target_texture_2d =
1848                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1849         ec->image_target_renderbuffer_storage = (void *)
1850                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1851         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1852         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1853         ec->bind_display =
1854                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1855         ec->unbind_display =
1856                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1857
1858         extensions = (const char *) glGetString(GL_EXTENSIONS);
1859         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1860                 fprintf(stderr,
1861                         "GL_EXT_texture_format_BGRA8888 not available\n");
1862                 return -1;
1863         }
1864
1865         extensions =
1866                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1867         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1868                 ec->has_bind_display = 1;
1869         if (ec->has_bind_display)
1870                 ec->bind_display(ec->display, ec->wl_display);
1871
1872         wl_list_init(&ec->surface_list);
1873         wl_list_init(&ec->input_device_list);
1874         wl_list_init(&ec->output_list);
1875         wl_list_init(&ec->binding_list);
1876         wl_list_init(&ec->animation_list);
1877         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1878         ec->fade.animation.frame = fade_frame;
1879         wl_list_init(&ec->fade.animation.link);
1880
1881         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1882                                     MODIFIER_CTRL | MODIFIER_ALT,
1883                                     terminate_binding, ec);
1884
1885         create_pointer_images(ec);
1886
1887         screenshooter_create(ec);
1888
1889         glActiveTexture(GL_TEXTURE0);
1890
1891         if (wlsc_shader_init(&ec->texture_shader,
1892                              vertex_shader, texture_fragment_shader) < 0)
1893                 return -1;
1894         if (init_solid_shader(&ec->solid_shader,
1895                               ec->texture_shader.vertex_shader,
1896                               solid_fragment_shader) < 0)
1897                 return -1;
1898
1899         loop = wl_display_get_event_loop(ec->wl_display);
1900         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1901         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1902
1903         pixman_region32_init(&ec->damage);
1904         wlsc_compositor_schedule_repaint(ec);
1905
1906         return 0;
1907 }
1908
1909 static int on_term_signal(int signal_number, void *data)
1910 {
1911         struct wlsc_compositor *ec = data;
1912
1913         wl_display_terminate(ec->wl_display);
1914
1915         return 1;
1916 }
1917
1918 static void *
1919 load_module(const char *name, const char *entrypoint, void **handle)
1920 {
1921         char path[PATH_MAX];
1922         void *module, *init;
1923
1924         if (name[0] != '/')
1925                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1926         else
1927                 snprintf(path, sizeof path, "%s", name);
1928
1929         module = dlopen(path, RTLD_LAZY);
1930         if (!module) {
1931                 fprintf(stderr,
1932                         "failed to load module: %s\n", dlerror());
1933                 return NULL;
1934         }
1935
1936         init = dlsym(module, entrypoint);
1937         if (!init) {
1938                 fprintf(stderr,
1939                         "failed to lookup init function: %s\n", dlerror());
1940                 return NULL;
1941         }
1942
1943         return init;
1944 }
1945
1946 int main(int argc, char *argv[])
1947 {
1948         struct wl_display *display;
1949         struct wlsc_compositor *ec;
1950         struct wl_event_loop *loop;
1951         int o, xserver = 0;
1952         void *shell_module, *backend_module;
1953         int (*shell_init)(struct wlsc_compositor *ec);
1954         struct wlsc_compositor
1955                 *(*backend_init)(struct wl_display *display, char *options);
1956         char *backend = NULL;
1957         char *backend_options = "";
1958         char *shell = NULL;
1959         char *p;
1960
1961         static const char opts[] = "B:b:o:S:i:s:x";
1962         static const struct option longopts[ ] = {
1963                 { "backend", 1, NULL, 'B' },
1964                 { "backend-options", 1, NULL, 'o' },
1965                 { "background", 1, NULL, 'b' },
1966                 { "socket", 1, NULL, 'S' },
1967                 { "idle-time", 1, NULL, 'i' },
1968                 { "shell", 1, NULL, 's' },
1969                 { "xserver", 0, NULL, 'x' },
1970                 { NULL, }
1971         };
1972
1973         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1974                 switch (o) {
1975                 case 'b':
1976                         option_background = optarg;
1977                         break;
1978                 case 'B':
1979                         backend = optarg;
1980                         break;
1981                 case 'o':
1982                         backend_options = optarg;
1983                         break;
1984                 case 'S':
1985                         option_socket_name = optarg;
1986                         break;
1987                 case 'i':
1988                         option_idle_time = strtol(optarg, &p, 0);
1989                         if (*p != '\0') {
1990                                 fprintf(stderr,
1991                                         "invalid idle time option: %s\n",
1992                                         optarg);
1993                                 exit(EXIT_FAILURE);
1994                         }
1995                         break;
1996                 case 's':
1997                         shell = optarg;
1998                         break;
1999                 case 'x':
2000                         xserver = 1;
2001                         break;
2002                 }
2003         }
2004
2005         display = wl_display_create();
2006
2007         ec = NULL;
2008
2009         if (!backend) {
2010                 if (getenv("WAYLAND_DISPLAY"))
2011                         backend = "wayland-backend.so";
2012                 else if (getenv("DISPLAY"))
2013                         backend = "x11-backend.so";
2014                 else if (getenv("OPENWFD"))
2015                         backend = "openwfd-backend.so";
2016                 else
2017                         backend = "drm-backend.so";
2018         }
2019
2020         if (!shell)
2021                 shell = "desktop-shell.so";
2022
2023         backend_init = load_module(backend, "backend_init", &backend_module);
2024         if (!backend_init)
2025                 exit(EXIT_FAILURE);
2026
2027         shell_init = load_module(shell, "shell_init", &shell_module);
2028         if (!shell_init)
2029                 exit(EXIT_FAILURE);
2030
2031         ec = backend_init(display, backend_options);
2032         if (ec == NULL) {
2033                 fprintf(stderr, "failed to create compositor\n");
2034                 exit(EXIT_FAILURE);
2035         }
2036
2037         if (shell_init(ec) < 0)
2038                 exit(EXIT_FAILURE);
2039
2040         if (xserver)
2041                 wlsc_xserver_init(display);
2042
2043         if (wl_display_add_socket(display, option_socket_name)) {
2044                 fprintf(stderr, "failed to add socket: %m\n");
2045                 exit(EXIT_FAILURE);
2046         }
2047
2048         loop = wl_display_get_event_loop(ec->wl_display);
2049         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2050         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2051
2052         wl_list_init(&child_process_list);
2053         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2054
2055         wl_display_run(display);
2056
2057         if (ec->has_bind_display)
2058                 ec->unbind_display(ec->display, display);
2059         wl_display_destroy(display);
2060
2061         ec->destroy(ec);
2062
2063         return 0;
2064 }