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, opaque;
 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         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 780         pixman_region32_init(&total_damage);
 781         pixman_region32_union(&total_damage, &new_damage,
 782                               &output->previous_damage);
 783         pixman_region32_copy(&output->previous_damage, &new_damage);
 784
 785         pixman_region32_fini(&clip);
 786         pixman_region32_fini(&new_damage);
 787
 788         device = (struct wlsc_input_device *) ec->input_device;
 789         if (ec->focus && ec->fade.spring.current < 0.001) {
 790                 if (!wl_list_empty(&device->sprite->link)) {
 791                         wl_list_remove(&device->sprite->link);
 792                         wl_list_init(&device->sprite->link);
 793                 }
 794                 if (output->set_hardware_cursor(output, device) < 0)
 795                         wl_list_insert(&ec->surface_list,
 796                                        &device->sprite->link);
 797         } else {
 798                 output->set_hardware_cursor(output, NULL);
 799                 if (wl_list_empty(&device->sprite->link))
 800                         wl_list_insert(&ec->surface_list,
 801                                        &device->sprite->link);
 802         }
 803
 804         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 805
 806         if (es->visual == &ec->compositor.rgb_visual &&
 807             output->prepare_scanout_surface(output, es) == 0) {
 808                 /* We're drawing nothing now,
 809                  * draw the damaged regions later. */
 810                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 811
 812                 output->scanout_buffer = es->buffer;
 813                 output->scanout_buffer->busy_count++;
 814
 815                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 816                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 817                                &output->scanout_buffer_destroy_listener.link);
 818
 819                 return;
 820         }
 821
 822         if (es->fullscreen_output == output) {
 823                 if (es->width < output->current->width ||
 824                     es->height < output->current->height)
 825                         glClear(GL_COLOR_BUFFER_BIT);
 826                 wlsc_surface_draw(es, output, &total_damage);
 827         } else {
 828                 pixman_region32_init(&opaque);
 829                 wl_list_for_each(es, &ec->surface_list, link) {
 830                         pixman_region32_subtract(&es->damage, &total_damage, &opaque);
 831                         if (es->visual == &ec->compositor.rgb_visual)
 832                                 pixman_region32_union_rect(&opaque, &opaque,
 833                                                            es->x, es->y, es->width, es->height);
 834                 }
 835                 pixman_region32_fini(&opaque);
 836
 837                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 838                         wlsc_surface_draw(es, output, &es->damage);
 839                         pixman_region32_fini(&es->damage);
 840                         pixman_region32_init(&es->damage);
 841                 }
 842         }
 843
 844         if (ec->fade.spring.current > 0.001)
 845                 fade_output(output, ec->fade.spring.current, &total_damage);
 846 }
 847
 848 static void
 849 repaint(void *data, int msecs)
 850 {
 851         struct wlsc_output *output = data;
 852         struct wlsc_compositor *compositor = output->compositor;
 853         struct wlsc_surface *es;
 854         struct wlsc_animation *animation, *next;
 855
 856         wlsc_output_repaint(output);
 857         output->repaint_needed = 0;
 858         output->repaint_scheduled = 1;
 859         output->present(output);
 860
 861         /* FIXME: Keep the surfaces in an per-output list. */
 862         wl_list_for_each(es, &compositor->surface_list, link) {
 863                 if (es->output == output) {
 864                         wl_display_post_frame(compositor->wl_display,
 865                                               &es->surface, msecs);
 866                 }
 867         }
 868
 869         wl_list_for_each_safe(animation, next,
 870                               &compositor->animation_list, link)
 871                 animation->frame(animation, output, msecs);
 872 }
 873
 874 static void
 875 idle_repaint(void *data)
 876 {
 877         repaint(data, wlsc_compositor_get_time());
 878 }
 879
 880 WL_EXPORT void
 881 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 882 {
 883         wlsc_buffer_post_release(output->scanout_buffer);
 884         output->scanout_buffer = NULL;
 885         output->repaint_scheduled = 0;
 886
 887         if (output->repaint_needed)
 888                 repaint(output, msecs);
 889 }
 890
 891 WL_EXPORT void
 892 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 893 {
 894         struct wlsc_output *output;
 895         struct wl_event_loop *loop;
 896
 897         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 898                 return;
 899
 900         loop = wl_display_get_event_loop(compositor->wl_display);
 901         wl_list_for_each(output, &compositor->output_list, link) {
 902                 output->repaint_needed = 1;
 903                 if (output->repaint_scheduled)
 904                         continue;
 905
 906                 wl_event_loop_add_idle(loop, idle_repaint, output);
 907                 output->repaint_scheduled = 1;
 908         }
 909 }
 910
 911 WL_EXPORT void
 912 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 913 {
 914         int done;
 915
 916         done = wlsc_spring_done(&compositor->fade.spring);
 917         compositor->fade.spring.target = tint;
 918         if (wlsc_spring_done(&compositor->fade.spring))
 919                 return;
 920
 921         if (done)
 922                 compositor->fade.spring.timestamp =
 923                         wlsc_compositor_get_time();
 924
 925         wlsc_compositor_damage_all(compositor);
 926         if (wl_list_empty(&compositor->fade.animation.link))
 927                 wl_list_insert(compositor->animation_list.prev,
 928                                &compositor->fade.animation.link);
 929 }
 930
 931 static void
 932 surface_destroy(struct wl_client *client,
 933                 struct wl_surface *surface)
 934 {
 935         wl_resource_destroy(&surface->resource, client,
 936                             wlsc_compositor_get_time());
 937 }
 938
 939 WL_EXPORT void
 940 wlsc_surface_assign_output(struct wlsc_surface *es)
 941 {
 942         struct wlsc_compositor *ec = es->compositor;
 943         struct wlsc_output *output;
 944
 945         struct wlsc_output *tmp = es->output;
 946         es->output = NULL;
 947
 948         wl_list_for_each(output, &ec->output_list, link) {
 949                 if (pixman_region32_contains_point(&output->region,
 950                                                    es->x, es->y, NULL)) {
 951                         if (output != tmp)
 952                                 printf("assiging surface %p to output %p\n",
 953                                        es, output);
 954                         es->output = output;
 955                 }
 956         }
 957
 958         if (es->output == NULL) {
 959                 printf("no output found\n");
 960                 es->output = container_of(ec->output_list.next,
 961                                           struct wlsc_output, link);
 962         }
 963 }
 964
 965 static void
 966 surface_attach(struct wl_client *client,
 967                struct wl_surface *surface, struct wl_buffer *buffer,
 968                int32_t x, int32_t y)
 969 {
 970         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 971
 972         /* FIXME: This damages the entire old surface, but we should
 973          * really just damage the part that's no longer covered by the
 974          * surface.  Anything covered by the new surface will be
 975          * damaged by the client. */
 976         if (es->buffer)
 977                 wlsc_surface_damage_below(es);
 978
 979         buffer->busy_count++;
 980         wlsc_buffer_post_release(es->buffer);
 981
 982         es->buffer = buffer;
 983         wl_list_remove(&es->buffer_destroy_listener.link);
 984         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 985                        &es->buffer_destroy_listener.link);
 986
 987         es->x += x;
 988         es->y += y;
 989         es->width = buffer->width;
 990         es->height = buffer->height;
 991         if (x != 0 || y != 0)
 992                 wlsc_surface_assign_output(es);
 993         if (es->visual == NULL)
 994                 wl_list_insert(&es->compositor->surface_list, &es->link);
 995
 996         wlsc_buffer_attach(buffer, surface);
 997
 998         es->compositor->shell->attach(es->compositor->shell, es);
 999 }
1000
1001 static void
1002 surface_damage(struct wl_client *client,
1003                struct wl_surface *surface,
1004                int32_t x, int32_t y, int32_t width, int32_t height)
1005 {
1006         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1007
1008         wlsc_surface_damage_rectangle(es, x, y, width, height);
1009 }
1010
1011 const static struct wl_surface_interface surface_interface = {
1012         surface_destroy,
1013         surface_attach,
1014         surface_damage
1015 };
1016
1017 static void
1018 wlsc_input_device_attach(struct wlsc_input_device *device,
1019                          int x, int y, int width, int height)
1020 {
1021         wlsc_surface_damage_below(device->sprite);
1022
1023         device->hotspot_x = x;
1024         device->hotspot_y = y;
1025
1026         device->sprite->x = device->input_device.x - device->hotspot_x;
1027         device->sprite->y = device->input_device.y - device->hotspot_y;
1028         device->sprite->width = width;
1029         device->sprite->height = height;
1030
1031         wlsc_surface_damage(device->sprite);
1032 }
1033
1034 static void
1035 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1036                                 struct wl_buffer *buffer, int x, int y)
1037 {
1038         wlsc_buffer_attach(buffer, &device->sprite->surface);
1039         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1040 }
1041
1042 static void
1043 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1044                                 struct wlsc_sprite *sprite, int x, int y)
1045 {
1046         wlsc_sprite_attach(sprite, &device->sprite->surface);
1047         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1048 }
1049
1050 WL_EXPORT void
1051 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1052                                     enum wlsc_pointer_type type)
1053 {
1054         struct wlsc_compositor *compositor =
1055                 (struct wlsc_compositor *) device->input_device.compositor;
1056
1057         wlsc_input_device_attach_sprite(device,
1058                                         compositor->pointer_sprites[type],
1059                                         pointer_images[type].hotspot_x,
1060                                         pointer_images[type].hotspot_y);
1061 }
1062
1063 static void
1064 compositor_create_surface(struct wl_client *client,
1065                           struct wl_compositor *compositor, uint32_t id)
1066 {
1067         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1068         struct wlsc_surface *surface;
1069
1070         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1071         if (surface == NULL) {
1072                 wl_client_post_no_memory(client);
1073                 return;
1074         }
1075
1076         surface->surface.resource.destroy = destroy_surface;
1077
1078         surface->surface.resource.object.id = id;
1079         surface->surface.resource.object.interface = &wl_surface_interface;
1080         surface->surface.resource.object.implementation =
1081                 (void (**)(void)) &surface_interface;
1082         surface->surface.client = client;
1083
1084         wl_client_add_resource(client, &surface->surface.resource);
1085 }
1086
1087 const static struct wl_compositor_interface compositor_interface = {
1088         compositor_create_surface,
1089 };
1090
1091 static void
1092 wlsc_surface_transform(struct wlsc_surface *surface,
1093                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1094 {
1095         *sx = x - surface->x;
1096         *sy = y - surface->y;
1097 }
1098
1099 WL_EXPORT struct wlsc_surface *
1100 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1101 {
1102         struct wlsc_compositor *ec =
1103                 (struct wlsc_compositor *) device->compositor;
1104         struct wlsc_surface *es;
1105
1106         wl_list_for_each(es, &ec->surface_list, link) {
1107                 if (es->surface.client == NULL)
1108                         continue;
1109                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1110                 if (0 <= *sx && *sx < es->width &&
1111                     0 <= *sy && *sy < es->height)
1112                         return es;
1113         }
1114
1115         return NULL;
1116 }
1117
1118
1119 static void
1120 motion_grab_motion(struct wl_grab *grab,
1121                    uint32_t time, int32_t x, int32_t y)
1122 {
1123         struct wlsc_input_device *device =
1124                 (struct wlsc_input_device *) grab->input_device;
1125         struct wlsc_surface *es =
1126                 (struct wlsc_surface *) device->input_device.pointer_focus;
1127         int32_t sx, sy;
1128
1129         wlsc_surface_transform(es, x, y, &sx, &sy);
1130         wl_client_post_event(es->surface.client,
1131                              &device->input_device.object,
1132                              WL_INPUT_DEVICE_MOTION,
1133                              time, x, y, sx, sy);
1134 }
1135
1136 static void
1137 motion_grab_button(struct wl_grab *grab,
1138                    uint32_t time, int32_t button, int32_t state)
1139 {
1140         wl_client_post_event(grab->input_device->pointer_focus->client,
1141                              &grab->input_device->object,
1142                              WL_INPUT_DEVICE_BUTTON,
1143                              time, button, state);
1144 }
1145
1146 static void
1147 motion_grab_end(struct wl_grab *grab, uint32_t time)
1148 {
1149 }
1150
1151 static const struct wl_grab_interface motion_grab_interface = {
1152         motion_grab_motion,
1153         motion_grab_button,
1154         motion_grab_end
1155 };
1156
1157 WL_EXPORT void
1158 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1159 {
1160         if (compositor->idle_inhibit)
1161                 return;
1162
1163         wlsc_compositor_fade(compositor, 0.0);
1164         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1165
1166         wl_event_source_timer_update(compositor->idle_source,
1167                                      option_idle_time * 1000);
1168 }
1169
1170 static void
1171 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1172 {
1173         wlsc_compositor_wake(compositor);
1174         compositor->idle_inhibit++;
1175 }
1176
1177 static void
1178 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1179 {
1180         compositor->idle_inhibit--;
1181         wlsc_compositor_wake(compositor);
1182 }
1183
1184 static int
1185 idle_handler(void *data)
1186 {
1187         struct wlsc_compositor *compositor = data;
1188
1189         if (compositor->idle_inhibit)
1190                 return 1;
1191
1192         wlsc_compositor_fade(compositor, 1.0);
1193
1194         return 1;
1195 }
1196
1197 WL_EXPORT void
1198 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1199 {
1200         struct wlsc_surface *es;
1201         struct wlsc_compositor *ec =
1202                 (struct wlsc_compositor *) device->compositor;
1203         struct wlsc_output *output;
1204         const struct wl_grab_interface *interface;
1205         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1206         int32_t sx, sy;
1207         int x_valid = 0, y_valid = 0;
1208         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1209
1210         wlsc_compositor_wake(ec);
1211
1212         wl_list_for_each(output, &ec->output_list, link) {
1213                 if (output->x <= x && x <= output->x + output->current->width)
1214                         x_valid = 1;
1215
1216                 if (output->y <= y && y <= output->y + output->current->height)
1217                         y_valid = 1;
1218
1219                 /* FIXME: calculate this only on output addition/deletion */
1220                 if (output->x < min_x)
1221                         min_x = output->x;
1222                 if (output->y < min_y)
1223                         min_y = output->y;
1224
1225                 if (output->x + output->current->width > max_x)
1226                         max_x = output->x + output->current->width;
1227                 if (output->y + output->current->height > max_y)
1228                         max_y = output->y + output->current->height;
1229         }
1230
1231         if (!x_valid) {
1232                 if (x < min_x)
1233                         x = min_x;
1234                 else if (x >= max_x)
1235                         x = max_x;
1236         }
1237         if (!y_valid) {
1238                 if (y < min_y)
1239                         y = min_y;
1240                 else  if (y >= max_y)
1241                         y = max_y;
1242         }
1243
1244         device->x = x;
1245         device->y = y;
1246
1247         if (device->grab) {
1248                 interface = device->grab->interface;
1249                 interface->motion(device->grab, time, x, y);
1250         } else {
1251                 es = pick_surface(device, &sx, &sy);
1252                 wl_input_device_set_pointer_focus(device,
1253                                                   &es->surface,
1254                                                   time, x, y, sx, sy);
1255                 if (es)
1256                         wl_client_post_event(es->surface.client,
1257                                              &device->object,
1258                                              WL_INPUT_DEVICE_MOTION,
1259                                              time, x, y, sx, sy);
1260         }
1261
1262         wlsc_surface_damage_below(wd->sprite);
1263
1264         wd->sprite->x = device->x - wd->hotspot_x;
1265         wd->sprite->y = device->y - wd->hotspot_y;
1266
1267         wlsc_surface_damage(wd->sprite);
1268 }
1269
1270 WL_EXPORT void
1271 wlsc_surface_activate(struct wlsc_surface *surface,
1272                       struct wlsc_input_device *device, uint32_t time)
1273 {
1274         struct wlsc_shell *shell = surface->compositor->shell;
1275
1276         wlsc_surface_raise(surface);
1277         if (device->selection)
1278                 shell->set_selection_focus(shell,
1279                                            device->selection,
1280                                            &surface->surface, time);
1281
1282         wl_input_device_set_keyboard_focus(&device->input_device,
1283                                            &surface->surface,
1284                                            time);
1285 }
1286
1287 struct wlsc_binding {
1288         uint32_t key;
1289         uint32_t button;
1290         uint32_t modifier;
1291         wlsc_binding_handler_t handler;
1292         void *data;
1293         struct wl_list link;
1294 };
1295
1296 WL_EXPORT void
1297 notify_button(struct wl_input_device *device,
1298               uint32_t time, int32_t button, int32_t state)
1299 {
1300         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1301         struct wlsc_compositor *compositor =
1302                 (struct wlsc_compositor *) device->compositor;
1303         struct wlsc_binding *b;
1304         struct wlsc_surface *surface =
1305                 (struct wlsc_surface *) device->pointer_focus;
1306
1307         if (state)
1308                 wlsc_compositor_idle_inhibit(compositor);
1309         else
1310                 wlsc_compositor_idle_release(compositor);
1311
1312         if (state && surface && device->grab == NULL) {
1313                 wlsc_surface_activate(surface, wd, time);
1314                 wl_input_device_start_grab(device,
1315                                            &device->motion_grab,
1316                                            button, time);
1317         }
1318
1319         wl_list_for_each(b, &compositor->binding_list, link) {
1320                 if (b->button == button &&
1321                     b->modifier == wd->modifier_state && state) {
1322                         b->handler(&wd->input_device,
1323                                    time, 0, button, state, b->data);
1324                         break;
1325                 }
1326         }
1327
1328         if (device->grab)
1329                 device->grab->interface->button(device->grab, time,
1330                                                 button, state);
1331
1332         if (!state && device->grab && device->grab_button == button)
1333                 wl_input_device_end_grab(device, time);
1334 }
1335
1336 static void
1337 terminate_binding(struct wl_input_device *device, uint32_t time,
1338                   uint32_t key, uint32_t button, uint32_t state, void *data)
1339 {
1340         struct wlsc_compositor *compositor = data;
1341
1342         if (state)
1343                 wl_display_terminate(compositor->wl_display);
1344 }
1345
1346 WL_EXPORT struct wlsc_binding *
1347 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1348                             uint32_t key, uint32_t button, uint32_t modifier,
1349                             wlsc_binding_handler_t handler, void *data)
1350 {
1351         struct wlsc_binding *binding;
1352
1353         binding = malloc(sizeof *binding);
1354         if (binding == NULL)
1355                 return NULL;
1356
1357         binding->key = key;
1358         binding->button = button;
1359         binding->modifier = modifier;
1360         binding->handler = handler;
1361         binding->data = data;
1362         wl_list_insert(compositor->binding_list.prev, &binding->link);
1363
1364         return binding;
1365 }
1366
1367 WL_EXPORT void
1368 wlsc_binding_destroy(struct wlsc_binding *binding)
1369 {
1370         wl_list_remove(&binding->link);
1371         free(binding);
1372 }
1373
1374 static void
1375 update_modifier_state(struct wlsc_input_device *device,
1376                       uint32_t key, uint32_t state)
1377 {
1378         uint32_t modifier;
1379
1380         switch (key) {
1381         case KEY_LEFTCTRL:
1382         case KEY_RIGHTCTRL:
1383                 modifier = MODIFIER_CTRL;
1384                 break;
1385
1386         case KEY_LEFTALT:
1387         case KEY_RIGHTALT:
1388                 modifier = MODIFIER_ALT;
1389                 break;
1390
1391         case KEY_LEFTMETA:
1392         case KEY_RIGHTMETA:
1393                 modifier = MODIFIER_SUPER;
1394                 break;
1395
1396         default:
1397                 modifier = 0;
1398                 break;
1399         }
1400
1401         if (state)
1402                 device->modifier_state |= modifier;
1403         else
1404                 device->modifier_state &= ~modifier;
1405 }
1406
1407 WL_EXPORT void
1408 notify_key(struct wl_input_device *device,
1409            uint32_t time, uint32_t key, uint32_t state)
1410 {
1411         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1412         struct wlsc_compositor *compositor =
1413                 (struct wlsc_compositor *) device->compositor;
1414         uint32_t *k, *end;
1415         struct wlsc_binding *b;
1416
1417         if (state)
1418                 wlsc_compositor_idle_inhibit(compositor);
1419         else
1420                 wlsc_compositor_idle_release(compositor);
1421
1422         wl_list_for_each(b, &compositor->binding_list, link) {
1423                 if (b->key == key &&
1424                     b->modifier == wd->modifier_state) {
1425                         b->handler(&wd->input_device,
1426                                    time, key, 0, state, b->data);
1427                         break;
1428                 }
1429         }
1430
1431         update_modifier_state(wd, key, state);
1432         end = device->keys.data + device->keys.size;
1433         for (k = device->keys.data; k < end; k++) {
1434                 if (*k == key)
1435                         *k = *--end;
1436         }
1437         device->keys.size = (void *) end - device->keys.data;
1438         if (state) {
1439                 k = wl_array_add(&device->keys, sizeof *k);
1440                 *k = key;
1441         }
1442
1443         if (device->keyboard_focus != NULL)
1444                 wl_client_post_event(device->keyboard_focus->client,
1445                                      &device->object,
1446                                      WL_INPUT_DEVICE_KEY, time, key, state);
1447 }
1448
1449 WL_EXPORT void
1450 notify_pointer_focus(struct wl_input_device *device,
1451                      uint32_t time, struct wlsc_output *output,
1452                      int32_t x, int32_t y)
1453 {
1454         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1455         struct wlsc_compositor *compositor =
1456                 (struct wlsc_compositor *) device->compositor;
1457         struct wlsc_surface *es;
1458         int32_t sx, sy;
1459
1460         if (output) {
1461                 device->x = x;
1462                 device->y = y;
1463                 es = pick_surface(device, &sx, &sy);
1464                 wl_input_device_set_pointer_focus(device,
1465                                                   &es->surface,
1466                                                   time, x, y, sx, sy);
1467
1468                 compositor->focus = 1;
1469
1470                 wd->sprite->x = device->x - wd->hotspot_x;
1471                 wd->sprite->y = device->y - wd->hotspot_y;
1472         } else {
1473                 wl_input_device_set_pointer_focus(device, NULL,
1474                                                   time, 0, 0, 0, 0);
1475                 compositor->focus = 0;
1476         }
1477
1478         wlsc_surface_damage(wd->sprite);
1479 }
1480
1481 WL_EXPORT void
1482 notify_keyboard_focus(struct wl_input_device *device,
1483                       uint32_t time, struct wlsc_output *output,
1484                       struct wl_array *keys)
1485 {
1486         struct wlsc_input_device *wd =
1487                 (struct wlsc_input_device *) device;
1488         struct wlsc_compositor *compositor =
1489                 (struct wlsc_compositor *) device->compositor;
1490         struct wlsc_surface *es;
1491         uint32_t *k, *end;
1492
1493         if (!wl_list_empty(&compositor->surface_list))
1494                 es = container_of(compositor->surface_list.next,
1495                                   struct wlsc_surface, link);
1496         else
1497                 es = NULL;
1498
1499         if (output) {
1500                 wl_array_copy(&wd->input_device.keys, keys);
1501                 wd->modifier_state = 0;
1502                 end = device->keys.data + device->keys.size;
1503                 for (k = device->keys.data; k < end; k++) {
1504                         wlsc_compositor_idle_inhibit(compositor);
1505                         update_modifier_state(wd, *k, 1);
1506                 }
1507
1508                 if (es->surface.client)
1509                         wl_input_device_set_keyboard_focus(&wd->input_device,
1510                                                            &es->surface, time);
1511         } else {
1512                 end = device->keys.data + device->keys.size;
1513                 for (k = device->keys.data; k < end; k++)
1514                         wlsc_compositor_idle_release(compositor);
1515
1516                 wd->modifier_state = 0;
1517                 wl_input_device_set_keyboard_focus(&wd->input_device,
1518                                                    NULL, time);
1519         }
1520 }
1521
1522
1523 static void
1524 input_device_attach(struct wl_client *client,
1525                     struct wl_input_device *device_base,
1526                     uint32_t time,
1527                     struct wl_buffer *buffer, int32_t x, int32_t y)
1528 {
1529         struct wlsc_input_device *device =
1530                 (struct wlsc_input_device *) device_base;
1531
1532         if (time < device->input_device.pointer_focus_time)
1533                 return;
1534         if (device->input_device.pointer_focus == NULL)
1535                 return;
1536         if (device->input_device.pointer_focus->client != client)
1537                 return;
1538
1539         if (buffer == NULL) {
1540                 wlsc_input_device_set_pointer_image(device,
1541                                                     WLSC_POINTER_LEFT_PTR);
1542                 return;
1543         }
1544
1545         wlsc_input_device_attach_buffer(device, buffer, x, y);
1546 }
1547
1548 const static struct wl_input_device_interface input_device_interface = {
1549         input_device_attach,
1550 };
1551
1552 WL_EXPORT void
1553 wlsc_input_device_init(struct wlsc_input_device *device,
1554                        struct wlsc_compositor *ec)
1555 {
1556         wl_input_device_init(&device->input_device, &ec->compositor);
1557
1558         device->input_device.object.interface = &wl_input_device_interface;
1559         device->input_device.object.implementation =
1560                 (void (**)(void)) &input_device_interface;
1561         wl_display_add_object(ec->wl_display, &device->input_device.object);
1562         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1563
1564         device->sprite = wlsc_surface_create(ec,
1565                                              device->input_device.x,
1566                                              device->input_device.y, 32, 32);
1567         wl_list_insert(&ec->surface_list, &device->sprite->link);
1568
1569         device->hotspot_x = 16;
1570         device->hotspot_y = 16;
1571         device->modifier_state = 0;
1572
1573         device->input_device.motion_grab.interface = &motion_grab_interface;
1574
1575         wl_list_insert(ec->input_device_list.prev, &device->link);
1576
1577         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1578 }
1579
1580 static void
1581 wlsc_output_post_geometry(struct wl_client *client,
1582                           struct wl_object *global, uint32_t version)
1583 {
1584         struct wlsc_output *output =
1585                 container_of(global, struct wlsc_output, object);
1586         struct wlsc_mode *mode;
1587
1588         wl_client_post_event(client, global,
1589                              WL_OUTPUT_GEOMETRY,
1590                              output->x,
1591                              output->y,
1592                              output->mm_width,
1593                              output->mm_height,
1594                              output->subpixel,
1595                              output->make, output->model);
1596
1597         wl_list_for_each (mode, &output->mode_list, link) {
1598                 wl_client_post_event(client, global,
1599                                      WL_OUTPUT_MODE,
1600                                      mode->flags,
1601                                      mode->width, mode->height, mode->refresh);
1602         }
1603 }
1604
1605 static const char vertex_shader[] =
1606         "uniform mat4 proj;\n"
1607         "attribute vec2 position;\n"
1608         "attribute vec2 texcoord;\n"
1609         "varying vec2 v_texcoord;\n"
1610         "void main()\n"
1611         "{\n"
1612         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1613         "   v_texcoord = texcoord;\n"
1614         "}\n";
1615
1616 static const char texture_fragment_shader[] =
1617         "precision mediump float;\n"
1618         "varying vec2 v_texcoord;\n"
1619         "uniform sampler2D tex;\n"
1620         "void main()\n"
1621         "{\n"
1622         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1623         "}\n";
1624
1625 static const char solid_fragment_shader[] =
1626         "precision mediump float;\n"
1627         "uniform vec4 color;\n"
1628         "void main()\n"
1629         "{\n"
1630         "   gl_FragColor = color\n;"
1631         "}\n";
1632
1633 static int
1634 compile_shader(GLenum type, const char *source)
1635 {
1636         GLuint s;
1637         char msg[512];
1638         GLint status;
1639
1640         s = glCreateShader(type);
1641         glShaderSource(s, 1, &source, NULL);
1642         glCompileShader(s);
1643         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1644         if (!status) {
1645                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1646                 fprintf(stderr, "shader info: %s\n", msg);
1647                 return GL_NONE;
1648         }
1649
1650         return s;
1651 }
1652
1653 static int
1654 wlsc_shader_init(struct wlsc_shader *shader,
1655                  const char *vertex_source, const char *fragment_source)
1656 {
1657         char msg[512];
1658         GLint status;
1659
1660         shader->vertex_shader =
1661                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1662         shader->fragment_shader =
1663                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1664
1665         shader->program = glCreateProgram();
1666         glAttachShader(shader->program, shader->vertex_shader);
1667         glAttachShader(shader->program, shader->fragment_shader);
1668         glBindAttribLocation(shader->program, 0, "position");
1669         glBindAttribLocation(shader->program, 1, "texcoord");
1670
1671         glLinkProgram(shader->program);
1672         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1673         if (!status) {
1674                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1675                 fprintf(stderr, "link info: %s\n", msg);
1676                 return -1;
1677         }
1678
1679         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1680         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1681
1682         return 0;
1683 }
1684
1685 static int
1686 init_solid_shader(struct wlsc_shader *shader,
1687                   GLuint vertex_shader, const char *fragment_source)
1688 {
1689         GLint status;
1690         char msg[512];
1691
1692         shader->vertex_shader = vertex_shader;
1693         shader->fragment_shader =
1694                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1695
1696         shader->program = glCreateProgram();
1697         glAttachShader(shader->program, shader->vertex_shader);
1698         glAttachShader(shader->program, shader->fragment_shader);
1699         glBindAttribLocation(shader->program, 0, "position");
1700         glBindAttribLocation(shader->program, 1, "texcoord");
1701
1702         glLinkProgram(shader->program);
1703         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1704         if (!status) {
1705                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1706                 fprintf(stderr, "link info: %s\n", msg);
1707                 return -1;
1708         }
1709
1710         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1711         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1712
1713         return 0;
1714 }
1715
1716 WL_EXPORT void
1717 wlsc_output_destroy(struct wlsc_output *output)
1718 {
1719         pixman_region32_fini(&output->region);
1720         pixman_region32_fini(&output->previous_damage);
1721         destroy_surface(&output->background->surface.resource, NULL);
1722 }
1723
1724 WL_EXPORT void
1725 wlsc_output_move(struct wlsc_output *output, int x, int y)
1726 {
1727         struct wlsc_compositor *c = output->compositor;
1728         int flip;
1729
1730         output->x = x;
1731         output->y = y;
1732
1733         if (output->background) {
1734                 output->background->x = x;
1735                 output->background->y = y;
1736         }
1737
1738         pixman_region32_init(&output->previous_damage);
1739         pixman_region32_init_rect(&output->region, x, y,
1740                                   output->current->width,
1741                                   output->current->height);
1742
1743         wlsc_matrix_init(&output->matrix);
1744         wlsc_matrix_translate(&output->matrix,
1745                               -output->x - output->current->width / 2.0,
1746                               -output->y - output->current->height / 2.0, 0);
1747
1748         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1749         wlsc_matrix_scale(&output->matrix,
1750                           2.0 / output->current->width,
1751                           flip * 2.0 / output->current->height, 1);
1752
1753         pixman_region32_union(&c->damage, &c->damage, &output->region);
1754 }
1755
1756 WL_EXPORT void
1757 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1758                  int x, int y, int width, int height, uint32_t flags)
1759 {
1760         output->compositor = c;
1761         output->x = x;
1762         output->y = y;
1763         output->mm_width = width;
1764         output->mm_height = height;
1765
1766         output->background =
1767                 background_create(output, option_background);
1768
1769         if (output->background != NULL)
1770                 wl_list_insert(c->surface_list.prev,
1771                                &output->background->link);
1772
1773         output->flags = flags;
1774         wlsc_output_move(output, x, y);
1775
1776         output->scanout_buffer_destroy_listener.func =
1777                 output_handle_scanout_buffer_destroy;
1778         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1779
1780         output->object.interface = &wl_output_interface;
1781         wl_display_add_object(c->wl_display, &output->object);
1782         wl_display_add_global(c->wl_display, &output->object,
1783                               wlsc_output_post_geometry);
1784 }
1785
1786 static void
1787 shm_buffer_created(struct wl_buffer *buffer)
1788 {
1789         struct wl_list *surfaces_attached_to;
1790
1791         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1792         if (!surfaces_attached_to) {
1793                 buffer->user_data = NULL;
1794                 return;
1795         }
1796
1797         wl_list_init(surfaces_attached_to);
1798
1799         buffer->user_data = surfaces_attached_to;
1800 }
1801
1802 static void
1803 shm_buffer_damaged(struct wl_buffer *buffer,
1804                    int32_t x, int32_t y, int32_t width, int32_t height)
1805 {
1806         struct wl_list *surfaces_attached_to = buffer->user_data;
1807         struct wlsc_surface *es;
1808         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1809
1810         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1811                 glBindTexture(GL_TEXTURE_2D, es->texture);
1812                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1813                              tex_width, buffer->height, 0,
1814                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1815                              wl_shm_buffer_get_data(buffer));
1816                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1817                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1818         }
1819 }
1820
1821 static void
1822 shm_buffer_destroyed(struct wl_buffer *buffer)
1823 {
1824         struct wl_list *surfaces_attached_to = buffer->user_data;
1825         struct wlsc_surface *es, *next;
1826
1827         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1828                 wl_list_remove(&es->buffer_link);
1829                 wl_list_init(&es->buffer_link);
1830         }
1831
1832         free(surfaces_attached_to);
1833 }
1834
1835 const static struct wl_shm_callbacks shm_callbacks = {
1836         shm_buffer_created,
1837         shm_buffer_damaged,
1838         shm_buffer_destroyed
1839 };
1840
1841 WL_EXPORT int
1842 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1843 {
1844         struct wl_event_loop *loop;
1845         const char *extensions;
1846
1847         ec->wl_display = display;
1848
1849         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1850
1851         ec->shm = wl_shm_init(display, &shm_callbacks);
1852
1853         ec->image_target_texture_2d =
1854                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1855         ec->image_target_renderbuffer_storage = (void *)
1856                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1857         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1858         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1859         ec->bind_display =
1860                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1861         ec->unbind_display =
1862                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1863
1864         extensions = (const char *) glGetString(GL_EXTENSIONS);
1865         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1866                 fprintf(stderr,
1867                         "GL_EXT_texture_format_BGRA8888 not available\n");
1868                 return -1;
1869         }
1870
1871         extensions =
1872                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1873         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1874                 ec->has_bind_display = 1;
1875         if (ec->has_bind_display)
1876                 ec->bind_display(ec->display, ec->wl_display);
1877
1878         wl_list_init(&ec->surface_list);
1879         wl_list_init(&ec->input_device_list);
1880         wl_list_init(&ec->output_list);
1881         wl_list_init(&ec->binding_list);
1882         wl_list_init(&ec->animation_list);
1883         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1884         ec->fade.animation.frame = fade_frame;
1885         wl_list_init(&ec->fade.animation.link);
1886
1887         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1888                                     MODIFIER_CTRL | MODIFIER_ALT,
1889                                     terminate_binding, ec);
1890
1891         create_pointer_images(ec);
1892
1893         screenshooter_create(ec);
1894
1895         glActiveTexture(GL_TEXTURE0);
1896
1897         if (wlsc_shader_init(&ec->texture_shader,
1898                              vertex_shader, texture_fragment_shader) < 0)
1899                 return -1;
1900         if (init_solid_shader(&ec->solid_shader,
1901                               ec->texture_shader.vertex_shader,
1902                               solid_fragment_shader) < 0)
1903                 return -1;
1904
1905         loop = wl_display_get_event_loop(ec->wl_display);
1906         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1907         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1908
1909         pixman_region32_init(&ec->damage);
1910         wlsc_compositor_schedule_repaint(ec);
1911
1912         return 0;
1913 }
1914
1915 static int on_term_signal(int signal_number, void *data)
1916 {
1917         struct wlsc_compositor *ec = data;
1918
1919         wl_display_terminate(ec->wl_display);
1920
1921         return 1;
1922 }
1923
1924 static void *
1925 load_module(const char *name, const char *entrypoint, void **handle)
1926 {
1927         char path[PATH_MAX];
1928         void *module, *init;
1929
1930         if (name[0] != '/')
1931                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1932         else
1933                 snprintf(path, sizeof path, "%s", name);
1934
1935         module = dlopen(path, RTLD_LAZY);
1936         if (!module) {
1937                 fprintf(stderr,
1938                         "failed to load module: %s\n", dlerror());
1939                 return NULL;
1940         }
1941
1942         init = dlsym(module, entrypoint);
1943         if (!init) {
1944                 fprintf(stderr,
1945                         "failed to lookup init function: %s\n", dlerror());
1946                 return NULL;
1947         }
1948
1949         return init;
1950 }
1951
1952 int main(int argc, char *argv[])
1953 {
1954         struct wl_display *display;
1955         struct wlsc_compositor *ec;
1956         struct wl_event_loop *loop;
1957         int o, xserver = 0;
1958         void *shell_module, *backend_module;
1959         int (*shell_init)(struct wlsc_compositor *ec);
1960         struct wlsc_compositor
1961                 *(*backend_init)(struct wl_display *display, char *options);
1962         char *backend = NULL;
1963         char *backend_options = "";
1964         char *shell = NULL;
1965         char *p;
1966
1967         static const char opts[] = "B:b:o:S:i:s:x";
1968         static const struct option longopts[ ] = {
1969                 { "backend", 1, NULL, 'B' },
1970                 { "backend-options", 1, NULL, 'o' },
1971                 { "background", 1, NULL, 'b' },
1972                 { "socket", 1, NULL, 'S' },
1973                 { "idle-time", 1, NULL, 'i' },
1974                 { "shell", 1, NULL, 's' },
1975                 { "xserver", 0, NULL, 'x' },
1976                 { NULL, }
1977         };
1978
1979         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1980                 switch (o) {
1981                 case 'b':
1982                         option_background = optarg;
1983                         break;
1984                 case 'B':
1985                         backend = optarg;
1986                         break;
1987                 case 'o':
1988                         backend_options = optarg;
1989                         break;
1990                 case 'S':
1991                         option_socket_name = optarg;
1992                         break;
1993                 case 'i':
1994                         option_idle_time = strtol(optarg, &p, 0);
1995                         if (*p != '\0') {
1996                                 fprintf(stderr,
1997                                         "invalid idle time option: %s\n",
1998                                         optarg);
1999                                 exit(EXIT_FAILURE);
2000                         }
2001                         break;
2002                 case 's':
2003                         shell = optarg;
2004                         break;
2005                 case 'x':
2006                         xserver = 1;
2007                         break;
2008                 }
2009         }
2010
2011         display = wl_display_create();
2012
2013         ec = NULL;
2014
2015         if (!backend) {
2016                 if (getenv("WAYLAND_DISPLAY"))
2017                         backend = "wayland-backend.so";
2018                 else if (getenv("DISPLAY"))
2019                         backend = "x11-backend.so";
2020                 else if (getenv("OPENWFD"))
2021                         backend = "openwfd-backend.so";
2022                 else
2023                         backend = "drm-backend.so";
2024         }
2025
2026         if (!shell)
2027                 shell = "desktop-shell.so";
2028
2029         backend_init = load_module(backend, "backend_init", &backend_module);
2030         if (!backend_init)
2031                 exit(EXIT_FAILURE);
2032
2033         shell_init = load_module(shell, "shell_init", &shell_module);
2034         if (!shell_init)
2035                 exit(EXIT_FAILURE);
2036
2037         ec = backend_init(display, backend_options);
2038         if (ec == NULL) {
2039                 fprintf(stderr, "failed to create compositor\n");
2040                 exit(EXIT_FAILURE);
2041         }
2042
2043         if (shell_init(ec) < 0)
2044                 exit(EXIT_FAILURE);
2045
2046         if (xserver)
2047                 wlsc_xserver_init(display);
2048
2049         if (wl_display_add_socket(display, option_socket_name)) {
2050                 fprintf(stderr, "failed to add socket: %m\n");
2051                 exit(EXIT_FAILURE);
2052         }
2053
2054         loop = wl_display_get_event_loop(ec->wl_display);
2055         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2056         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2057
2058         wl_list_init(&child_process_list);
2059         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2060
2061         wl_display_run(display);
2062
2063         if (ec->has_bind_display)
2064                 ec->unbind_display(ec->display, display);
2065         wl_display_destroy(display);
2066
2067         ec->destroy(ec);
2068
2069         return 0;
2070 }