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         pixman_region32_init(&surface->opaque);
 259
 260         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 261         wl_list_init(&surface->buffer_destroy_listener.link);
 262
 263         surface->transform = NULL;
 264
 265         return surface;
 266 }
 267
 268 WL_EXPORT void
 269 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 270                               int32_t x, int32_t y,
 271                               int32_t width, int32_t height)
 272 {
 273         struct wlsc_compositor *compositor = surface->compositor;
 274
 275         pixman_region32_union_rect(&surface->damage,
 276                                    &surface->damage,
 277                                    surface->x + x, surface->y + y,
 278                                    width, height);
 279         wlsc_compositor_schedule_repaint(compositor);
 280 }
 281
 282 WL_EXPORT void
 283 wlsc_surface_damage(struct wlsc_surface *surface)
 284 {
 285         wlsc_surface_damage_rectangle(surface, 0, 0,
 286                                       surface->width, surface->height);
 287 }
 288
 289 WL_EXPORT void
 290 wlsc_surface_damage_below(struct wlsc_surface *surface)
 291 {
 292         struct wlsc_surface *below;
 293
 294         if (surface->link.next == &surface->compositor->surface_list)
 295                 return;
 296
 297         below = container_of(surface->link.next, struct wlsc_surface, link);
 298
 299         pixman_region32_union_rect(&below->damage,
 300                                    &below->damage,
 301                                    surface->x, surface->y,
 302                                    surface->width, surface->height);
 303         wlsc_compositor_schedule_repaint(surface->compositor);
 304 }
 305
 306 WL_EXPORT void
 307 wlsc_surface_configure(struct wlsc_surface *surface,
 308                        int x, int y, int width, int height)
 309 {
 310         struct wlsc_compositor *compositor = surface->compositor;
 311
 312         wlsc_surface_damage_below(surface);
 313
 314         surface->x = x;
 315         surface->y = y;
 316         surface->width = width;
 317         surface->height = height;
 318
 319         wlsc_surface_assign_output(surface);
 320         wlsc_surface_damage(surface);
 321
 322         pixman_region32_fini(&surface->opaque);
 323         if (surface->visual == &compositor->compositor.rgb_visual)
 324                 pixman_region32_init_rect(&surface->opaque,
 325                                           surface->x, surface->y,
 326                                           surface->width, surface->height);
 327         else
 328                 pixman_region32_init(&surface->opaque);
 329 }
 330
 331 WL_EXPORT uint32_t
 332 wlsc_compositor_get_time(void)
 333 {
 334         struct timeval tv;
 335
 336         gettimeofday(&tv, NULL);
 337
 338         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 339 }
 340
 341 static void
 342 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 343 {
 344         struct wlsc_surface *surface =
 345                 container_of(resource, struct wlsc_surface, surface.resource);
 346         struct wlsc_compositor *compositor = surface->compositor;
 347
 348         wlsc_surface_damage_below(surface);
 349
 350         wl_list_remove(&surface->link);
 351         if (surface->saved_texture == 0)
 352                 glDeleteTextures(1, &surface->texture);
 353         else
 354                 glDeleteTextures(1, &surface->saved_texture);
 355
 356         if (surface->buffer)
 357                 wl_list_remove(&surface->buffer_destroy_listener.link);
 358
 359         if (surface->image != EGL_NO_IMAGE_KHR)
 360                 compositor->destroy_image(compositor->display,
 361                                           surface->image);
 362
 363         wl_list_remove(&surface->buffer_link);
 364
 365         free(surface);
 366 }
 367
 368 static void
 369 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 370 {
 371         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 372         struct wlsc_compositor *ec = es->compositor;
 373         struct wl_list *surfaces_attached_to;
 374
 375         if (es->saved_texture != 0)
 376                 es->texture = es->saved_texture;
 377
 378         glBindTexture(GL_TEXTURE_2D, es->texture);
 379
 380         if (wl_buffer_is_shm(buffer)) {
 381                 /* Unbind any EGLImage texture that may be bound, so we don't
 382                  * overwrite it.*/
 383                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 384                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 385                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 386                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 387                              es->pitch, buffer->height, 0,
 388                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 389                              wl_shm_buffer_get_data(buffer));
 390                 es->visual = buffer->visual;
 391
 392                 surfaces_attached_to = buffer->user_data;
 393
 394                 wl_list_remove(&es->buffer_link);
 395                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 396         } else {
 397                 if (es->image != EGL_NO_IMAGE_KHR)
 398                         ec->destroy_image(ec->display, es->image);
 399                 es->image = ec->create_image(ec->display, NULL,
 400                                              EGL_WAYLAND_BUFFER_WL,
 401                                              buffer, NULL);
 402
 403                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 404                 es->visual = buffer->visual;
 405                 es->pitch = es->width;
 406         }
 407 }
 408
 409 static void
 410 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 411 {
 412         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 413         struct wlsc_compositor *ec = es->compositor;
 414
 415         es->pitch = es->width;
 416         es->image = sprite->image;
 417         if (sprite->image != EGL_NO_IMAGE_KHR) {
 418                 glBindTexture(GL_TEXTURE_2D, es->texture);
 419                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 420         } else {
 421                 if (es->saved_texture == 0)
 422                         es->saved_texture = es->texture;
 423                 es->texture = sprite->texture;
 424         }
 425
 426         es->visual = sprite->visual;
 427
 428         if (es->buffer)
 429                 es->buffer = NULL;
 430 }
 431
 432 enum sprite_usage {
 433         SPRITE_USE_CURSOR = (1 << 0),
 434 };
 435
 436 static struct wlsc_sprite *
 437 create_sprite_from_png(struct wlsc_compositor *ec,
 438                        const char *filename, uint32_t usage)
 439 {
 440         uint32_t *pixels;
 441         struct wlsc_sprite *sprite;
 442         int32_t width, height;
 443         uint32_t stride;
 444
 445         pixels = wlsc_load_image(filename, &width, &height, &stride);
 446         if (pixels == NULL)
 447                 return NULL;
 448
 449         sprite = malloc(sizeof *sprite);
 450         if (sprite == NULL) {
 451                 free(pixels);
 452                 return NULL;
 453         }
 454
 455         sprite->visual = &ec->compositor.premultiplied_argb_visual;
 456         sprite->width = width;
 457         sprite->height = height;
 458         sprite->image = EGL_NO_IMAGE_KHR;
 459
 460         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 461                 sprite->image = ec->create_cursor_image(ec, width, height);
 462
 463         glGenTextures(1, &sprite->texture);
 464         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 465         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 466         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 467         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 468         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 469
 470         if (sprite->image != EGL_NO_IMAGE_KHR) {
 471                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 472                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 473                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 474         } else {
 475                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 476                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 477         }
 478
 479         free(pixels);
 480
 481         return sprite;
 482 }
 483
 484 static const struct {
 485         const char *filename;
 486         int hotspot_x, hotspot_y;
 487 } pointer_images[] = {
 488         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 489         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 490         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 491         { DATADIR "/wayland/grabbing.png",              20, 17 },
 492         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 493         { DATADIR "/wayland/left_side.png",             10, 20 },
 494         { DATADIR "/wayland/right_side.png",            30, 19 },
 495         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 496         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 497         { DATADIR "/wayland/top_side.png",              18,  8 },
 498         { DATADIR "/wayland/xterm.png",                 15, 15 }
 499 };
 500
 501 static void
 502 create_pointer_images(struct wlsc_compositor *ec)
 503 {
 504         int i, count;
 505
 506         count = ARRAY_LENGTH(pointer_images);
 507         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 508         for (i = 0; i < count; i++) {
 509                 ec->pointer_sprites[i] =
 510                         create_sprite_from_png(ec,
 511                                                pointer_images[i].filename,
 512                                                SPRITE_USE_CURSOR);
 513         }
 514 }
 515
 516 static struct wlsc_surface *
 517 background_create(struct wlsc_output *output, const char *filename)
 518 {
 519         struct wlsc_surface *background;
 520         struct wlsc_sprite *sprite;
 521
 522         background = wlsc_surface_create(output->compositor,
 523                                          output->x, output->y,
 524                                          output->current->width,
 525                                          output->current->height);
 526         if (background == NULL)
 527                 return NULL;
 528
 529         sprite = create_sprite_from_png(output->compositor, filename, 0);
 530         if (sprite == NULL) {
 531                 free(background);
 532                 return NULL;
 533         }
 534
 535         wlsc_sprite_attach(sprite, &background->surface);
 536
 537         return background;
 538 }
 539
 540 static int
 541 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 542 {
 543         struct wlsc_compositor *ec = es->compositor;
 544         GLfloat *v, inv_width, inv_height;
 545         pixman_box32_t *rectangles;
 546         unsigned int *p;
 547         int i, n;
 548
 549         rectangles = pixman_region32_rectangles(region, &n);
 550         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 551         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 552         inv_width = 1.0 / es->pitch;
 553         inv_height = 1.0 / es->height;
 554
 555         for (i = 0; i < n; i++, v += 16, p += 6) {
 556                 v[ 0] = rectangles[i].x1;
 557                 v[ 1] = rectangles[i].y1;
 558                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 559                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 560
 561                 v[ 4] = rectangles[i].x1;
 562                 v[ 5] = rectangles[i].y2;
 563                 v[ 6] = v[ 2];
 564                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 565
 566                 v[ 8] = rectangles[i].x2;
 567                 v[ 9] = rectangles[i].y1;
 568                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 569                 v[11] = v[ 3];
 570
 571                 v[12] = rectangles[i].x2;
 572                 v[13] = rectangles[i].y2;
 573                 v[14] = v[10];
 574                 v[15] = v[ 7];
 575
 576                 p[0] = i * 4 + 0;
 577                 p[1] = i * 4 + 1;
 578                 p[2] = i * 4 + 2;
 579                 p[3] = i * 4 + 2;
 580                 p[4] = i * 4 + 1;
 581                 p[5] = i * 4 + 3;
 582         }
 583
 584         return n;
 585 }
 586
 587 static void
 588 transform_vertex(struct wlsc_surface *surface,
 589                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 590 {
 591         struct wlsc_vector t;
 592
 593         t.f[0] = x;
 594         t.f[1] = y;
 595         t.f[2] = 0.0;
 596         t.f[3] = 1.0;
 597
 598         wlsc_matrix_transform(&surface->transform->matrix, &t);
 599
 600         r[ 0] = t.f[0];
 601         r[ 1] = t.f[1];
 602         r[ 2] = u;
 603         r[ 3] = v;
 604 }
 605
 606 static int
 607 texture_transformed_surface(struct wlsc_surface *es)
 608 {
 609         struct wlsc_compositor *ec = es->compositor;
 610         GLfloat *v;
 611         unsigned int *p;
 612
 613         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 614         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 615
 616         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 617         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 618         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 619         transform_vertex(es, es->x + es->width, es->y + es->height,
 620                          1.0, 1.0, &v[12]);
 621
 622         p[0] = 0;
 623         p[1] = 1;
 624         p[2] = 2;
 625         p[3] = 2;
 626         p[4] = 1;
 627         p[5] = 3;
 628
 629         return 1;
 630 }
 631
 632 static void
 633 wlsc_surface_draw(struct wlsc_surface *es,
 634                   struct wlsc_output *output, pixman_region32_t *clip)
 635 {
 636         struct wlsc_compositor *ec = es->compositor;
 637         GLfloat *v;
 638         pixman_region32_t repaint;
 639         GLint filter;
 640         int n;
 641
 642         pixman_region32_init_rect(&repaint,
 643                                   es->x, es->y, es->width, es->height);
 644         pixman_region32_intersect(&repaint, &repaint, clip);
 645         if (!pixman_region32_not_empty(&repaint))
 646                 return;
 647
 648         if (es->visual == &ec->compositor.argb_visual) {
 649                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 650                 glEnable(GL_BLEND);
 651         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 652                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 653                 glEnable(GL_BLEND);
 654         } else {
 655                 glDisable(GL_BLEND);
 656         }
 657
 658         if (es->transform == NULL) {
 659                 filter = GL_NEAREST;
 660                 n = texture_region(es, &repaint);
 661         } else {
 662                 filter = GL_LINEAR;
 663                 n = texture_transformed_surface(es);
 664         }
 665
 666         glBindTexture(GL_TEXTURE_2D, es->texture);
 667         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 668         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 669
 670         v = ec->vertices.data;
 671         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 672         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 673         glEnableVertexAttribArray(0);
 674         glEnableVertexAttribArray(1);
 675         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 676
 677         ec->vertices.size = 0;
 678         ec->indices.size = 0;
 679         pixman_region32_fini(&repaint);
 680 }
 681
 682 static void
 683 wlsc_surface_raise(struct wlsc_surface *surface)
 684 {
 685         struct wlsc_compositor *compositor = surface->compositor;
 686
 687         wl_list_remove(&surface->link);
 688         wl_list_insert(&compositor->surface_list, &surface->link);
 689         wlsc_surface_damage(surface);
 690 }
 691
 692 WL_EXPORT void
 693 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 694 {
 695         struct wlsc_output *output;
 696
 697         wl_list_for_each(output, &compositor->output_list, link)
 698                 wlsc_output_damage(output);
 699 }
 700
 701 static inline void
 702 wlsc_buffer_post_release(struct wl_buffer *buffer)
 703 {
 704         if (buffer == NULL || --buffer->busy_count > 0)
 705                 return;
 706
 707         assert(buffer->client != NULL);
 708         wl_client_post_event(buffer->client,
 709                              &buffer->resource.object,
 710                              WL_BUFFER_RELEASE);
 711 }
 712
 713 WL_EXPORT void
 714 wlsc_output_damage(struct wlsc_output *output)
 715 {
 716         struct wlsc_compositor *compositor = output->compositor;
 717
 718         pixman_region32_union(&compositor->damage,
 719                               &compositor->damage, &output->region);
 720         wlsc_compositor_schedule_repaint(compositor);
 721 }
 722
 723 static void
 724 fade_frame(struct wlsc_animation *animation,
 725            struct wlsc_output *output, uint32_t msecs)
 726 {
 727         struct wlsc_compositor *compositor =
 728                 container_of(animation,
 729                              struct wlsc_compositor, fade.animation);
 730
 731         wlsc_spring_update(&compositor->fade.spring, msecs);
 732         if (wlsc_spring_done(&compositor->fade.spring)) {
 733                 if (compositor->fade.spring.current > 0.999) {
 734                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 735                         compositor->shell->lock(compositor->shell);
 736                 }
 737                 compositor->fade.spring.current =
 738                         compositor->fade.spring.target;
 739                 wl_list_remove(&animation->link);
 740                 wl_list_init(&animation->link);
 741         }
 742
 743         wlsc_output_damage(output);
 744 }
 745
 746 static void
 747 fade_output(struct wlsc_output *output,
 748             GLfloat tint, pixman_region32_t *region)
 749 {
 750         struct wlsc_compositor *compositor = output->compositor;
 751         struct wlsc_surface surface;
 752         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 753
 754         surface.compositor = compositor;
 755         surface.x = output->x;
 756         surface.y = output->y;
 757         surface.width = output->current->width;
 758         surface.height = output->current->height;
 759         surface.texture = GL_NONE;
 760         surface.transform = NULL;
 761
 762         if (tint <= 1.0)
 763                 surface.visual =
 764                         &compositor->compositor.premultiplied_argb_visual;
 765         else
 766                 surface.visual = &compositor->compositor.rgb_visual;
 767
 768         glUseProgram(compositor->solid_shader.program);
 769         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 770                            1, GL_FALSE, output->matrix.d);
 771         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 772         wlsc_surface_draw(&surface, output, region);
 773 }
 774
 775 static void
 776 wlsc_output_repaint(struct wlsc_output *output)
 777 {
 778         struct wlsc_compositor *ec = output->compositor;
 779         struct wlsc_surface *es;
 780         struct wlsc_input_device *device;
 781         pixman_region32_t clip, new_damage, total_damage;
 782
 783         output->prepare_render(output);
 784
 785         glViewport(0, 0, output->current->width, output->current->height);
 786
 787         glUseProgram(ec->texture_shader.program);
 788         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 789                            1, GL_FALSE, output->matrix.d);
 790         glUniform1i(ec->texture_shader.tex_uniform, 0);
 791
 792         pixman_region32_init(&new_damage);
 793         pixman_region32_intersect(&new_damage, &ec->damage, &output->region);
 794         pixman_region32_init(&clip);
 795         pixman_region32_copy(&clip, &output->region);
 796         wl_list_for_each(es, &ec->surface_list, link) {
 797                 pixman_region32_intersect(&es->damage, &es->damage, &clip);
 798                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 799                 pixman_region32_subtract(&clip, &clip, &es->opaque);
 800         }
 801
 802         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 803         pixman_region32_init(&total_damage);
 804         pixman_region32_union(&total_damage, &new_damage,
 805                               &output->previous_damage);
 806         pixman_region32_copy(&output->previous_damage, &new_damage);
 807
 808         pixman_region32_fini(&clip);
 809         pixman_region32_fini(&new_damage);
 810
 811         device = (struct wlsc_input_device *) ec->input_device;
 812         if (ec->focus && ec->fade.spring.current < 0.001) {
 813                 if (!wl_list_empty(&device->sprite->link)) {
 814                         wl_list_remove(&device->sprite->link);
 815                         wl_list_init(&device->sprite->link);
 816                 }
 817                 if (output->set_hardware_cursor(output, device) < 0)
 818                         wl_list_insert(&ec->surface_list,
 819                                        &device->sprite->link);
 820         } else {
 821                 output->set_hardware_cursor(output, NULL);
 822                 if (wl_list_empty(&device->sprite->link))
 823                         wl_list_insert(&ec->surface_list,
 824                                        &device->sprite->link);
 825         }
 826
 827         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 828
 829         if (es->visual == &ec->compositor.rgb_visual &&
 830             output->prepare_scanout_surface(output, es) == 0) {
 831                 /* We're drawing nothing now,
 832                  * draw the damaged regions later. */
 833                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 834
 835                 output->scanout_buffer = es->buffer;
 836                 output->scanout_buffer->busy_count++;
 837
 838                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 839                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 840                                &output->scanout_buffer_destroy_listener.link);
 841
 842                 return;
 843         }
 844
 845         if (es->fullscreen_output == output) {
 846                 if (es->width < output->current->width ||
 847                     es->height < output->current->height)
 848                         glClear(GL_COLOR_BUFFER_BIT);
 849                 wlsc_surface_draw(es, output, &total_damage);
 850         } else {
 851                 wl_list_for_each(es, &ec->surface_list, link) {
 852                         pixman_region32_copy(&es->damage, &total_damage);
 853                         pixman_region32_subtract(&total_damage, &total_damage, &es->opaque);
 854                 }
 855
 856                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 857                         wlsc_surface_draw(es, output, &es->damage);
 858                         pixman_region32_fini(&es->damage);
 859                         pixman_region32_init(&es->damage);
 860                 }
 861         }
 862
 863         if (ec->fade.spring.current > 0.001)
 864                 fade_output(output, ec->fade.spring.current, &total_damage);
 865 }
 866
 867 static void
 868 repaint(void *data, int msecs)
 869 {
 870         struct wlsc_output *output = data;
 871         struct wlsc_compositor *compositor = output->compositor;
 872         struct wlsc_surface *es;
 873         struct wlsc_animation *animation, *next;
 874
 875         wlsc_output_repaint(output);
 876         output->repaint_needed = 0;
 877         output->repaint_scheduled = 1;
 878         output->present(output);
 879
 880         /* FIXME: Keep the surfaces in an per-output list. */
 881         wl_list_for_each(es, &compositor->surface_list, link) {
 882                 if (es->output == output) {
 883                         wl_display_post_frame(compositor->wl_display,
 884                                               &es->surface, msecs);
 885                 }
 886         }
 887
 888         wl_list_for_each_safe(animation, next,
 889                               &compositor->animation_list, link)
 890                 animation->frame(animation, output, msecs);
 891 }
 892
 893 static void
 894 idle_repaint(void *data)
 895 {
 896         repaint(data, wlsc_compositor_get_time());
 897 }
 898
 899 WL_EXPORT void
 900 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 901 {
 902         wlsc_buffer_post_release(output->scanout_buffer);
 903         output->scanout_buffer = NULL;
 904         output->repaint_scheduled = 0;
 905
 906         if (output->repaint_needed)
 907                 repaint(output, msecs);
 908 }
 909
 910 WL_EXPORT void
 911 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 912 {
 913         struct wlsc_output *output;
 914         struct wl_event_loop *loop;
 915
 916         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 917                 return;
 918
 919         loop = wl_display_get_event_loop(compositor->wl_display);
 920         wl_list_for_each(output, &compositor->output_list, link) {
 921                 output->repaint_needed = 1;
 922                 if (output->repaint_scheduled)
 923                         continue;
 924
 925                 wl_event_loop_add_idle(loop, idle_repaint, output);
 926                 output->repaint_scheduled = 1;
 927         }
 928 }
 929
 930 WL_EXPORT void
 931 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 932 {
 933         int done;
 934
 935         done = wlsc_spring_done(&compositor->fade.spring);
 936         compositor->fade.spring.target = tint;
 937         if (wlsc_spring_done(&compositor->fade.spring))
 938                 return;
 939
 940         if (done)
 941                 compositor->fade.spring.timestamp =
 942                         wlsc_compositor_get_time();
 943
 944         wlsc_compositor_damage_all(compositor);
 945         if (wl_list_empty(&compositor->fade.animation.link))
 946                 wl_list_insert(compositor->animation_list.prev,
 947                                &compositor->fade.animation.link);
 948 }
 949
 950 static void
 951 surface_destroy(struct wl_client *client,
 952                 struct wl_surface *surface)
 953 {
 954         wl_resource_destroy(&surface->resource, client,
 955                             wlsc_compositor_get_time());
 956 }
 957
 958 WL_EXPORT void
 959 wlsc_surface_assign_output(struct wlsc_surface *es)
 960 {
 961         struct wlsc_compositor *ec = es->compositor;
 962         struct wlsc_output *output;
 963
 964         struct wlsc_output *tmp = es->output;
 965         es->output = NULL;
 966
 967         wl_list_for_each(output, &ec->output_list, link) {
 968                 if (pixman_region32_contains_point(&output->region,
 969                                                    es->x, es->y, NULL)) {
 970                         if (output != tmp)
 971                                 printf("assiging surface %p to output %p\n",
 972                                        es, output);
 973                         es->output = output;
 974                 }
 975         }
 976
 977         if (es->output == NULL) {
 978                 printf("no output found\n");
 979                 es->output = container_of(ec->output_list.next,
 980                                           struct wlsc_output, link);
 981         }
 982 }
 983
 984 static void
 985 surface_attach(struct wl_client *client,
 986                struct wl_surface *surface, struct wl_buffer *buffer,
 987                int32_t x, int32_t y)
 988 {
 989         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 990
 991         buffer->busy_count++;
 992         wlsc_buffer_post_release(es->buffer);
 993
 994         es->buffer = buffer;
 995         wl_list_remove(&es->buffer_destroy_listener.link);
 996         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 997                        &es->buffer_destroy_listener.link);
 998
 999         if (es->visual == NULL)
1000                 wl_list_insert(&es->compositor->surface_list, &es->link);
1001
1002         wlsc_surface_configure(es, es->x + x, es->y + y,
1003                                buffer->width, buffer->height);
1004
1005         wlsc_buffer_attach(buffer, surface);
1006
1007         es->compositor->shell->attach(es->compositor->shell, es);
1008 }
1009
1010 static void
1011 surface_damage(struct wl_client *client,
1012                struct wl_surface *surface,
1013                int32_t x, int32_t y, int32_t width, int32_t height)
1014 {
1015         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1016
1017         wlsc_surface_damage_rectangle(es, x, y, width, height);
1018 }
1019
1020 const static struct wl_surface_interface surface_interface = {
1021         surface_destroy,
1022         surface_attach,
1023         surface_damage
1024 };
1025
1026 static void
1027 wlsc_input_device_attach(struct wlsc_input_device *device,
1028                          int x, int y, int width, int height)
1029 {
1030         wlsc_surface_damage_below(device->sprite);
1031
1032         device->hotspot_x = x;
1033         device->hotspot_y = y;
1034
1035         device->sprite->x = device->input_device.x - device->hotspot_x;
1036         device->sprite->y = device->input_device.y - device->hotspot_y;
1037         device->sprite->width = width;
1038         device->sprite->height = height;
1039
1040         wlsc_surface_damage(device->sprite);
1041 }
1042
1043 static void
1044 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1045                                 struct wl_buffer *buffer, int x, int y)
1046 {
1047         wlsc_buffer_attach(buffer, &device->sprite->surface);
1048         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1049 }
1050
1051 static void
1052 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1053                                 struct wlsc_sprite *sprite, int x, int y)
1054 {
1055         wlsc_sprite_attach(sprite, &device->sprite->surface);
1056         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1057 }
1058
1059 WL_EXPORT void
1060 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1061                                     enum wlsc_pointer_type type)
1062 {
1063         struct wlsc_compositor *compositor =
1064                 (struct wlsc_compositor *) device->input_device.compositor;
1065
1066         wlsc_input_device_attach_sprite(device,
1067                                         compositor->pointer_sprites[type],
1068                                         pointer_images[type].hotspot_x,
1069                                         pointer_images[type].hotspot_y);
1070 }
1071
1072 static void
1073 compositor_create_surface(struct wl_client *client,
1074                           struct wl_compositor *compositor, uint32_t id)
1075 {
1076         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1077         struct wlsc_surface *surface;
1078
1079         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1080         if (surface == NULL) {
1081                 wl_client_post_no_memory(client);
1082                 return;
1083         }
1084
1085         surface->surface.resource.destroy = destroy_surface;
1086
1087         surface->surface.resource.object.id = id;
1088         surface->surface.resource.object.interface = &wl_surface_interface;
1089         surface->surface.resource.object.implementation =
1090                 (void (**)(void)) &surface_interface;
1091         surface->surface.client = client;
1092
1093         wl_client_add_resource(client, &surface->surface.resource);
1094 }
1095
1096 const static struct wl_compositor_interface compositor_interface = {
1097         compositor_create_surface,
1098 };
1099
1100 static void
1101 wlsc_surface_transform(struct wlsc_surface *surface,
1102                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1103 {
1104         *sx = x - surface->x;
1105         *sy = y - surface->y;
1106 }
1107
1108 WL_EXPORT struct wlsc_surface *
1109 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1110 {
1111         struct wlsc_compositor *ec =
1112                 (struct wlsc_compositor *) device->compositor;
1113         struct wlsc_surface *es;
1114
1115         wl_list_for_each(es, &ec->surface_list, link) {
1116                 if (es->surface.client == NULL)
1117                         continue;
1118                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1119                 if (0 <= *sx && *sx < es->width &&
1120                     0 <= *sy && *sy < es->height)
1121                         return es;
1122         }
1123
1124         return NULL;
1125 }
1126
1127
1128 static void
1129 motion_grab_motion(struct wl_grab *grab,
1130                    uint32_t time, int32_t x, int32_t y)
1131 {
1132         struct wlsc_input_device *device =
1133                 (struct wlsc_input_device *) grab->input_device;
1134         struct wlsc_surface *es =
1135                 (struct wlsc_surface *) device->input_device.pointer_focus;
1136         int32_t sx, sy;
1137
1138         wlsc_surface_transform(es, x, y, &sx, &sy);
1139         wl_client_post_event(es->surface.client,
1140                              &device->input_device.object,
1141                              WL_INPUT_DEVICE_MOTION,
1142                              time, x, y, sx, sy);
1143 }
1144
1145 static void
1146 motion_grab_button(struct wl_grab *grab,
1147                    uint32_t time, int32_t button, int32_t state)
1148 {
1149         wl_client_post_event(grab->input_device->pointer_focus->client,
1150                              &grab->input_device->object,
1151                              WL_INPUT_DEVICE_BUTTON,
1152                              time, button, state);
1153 }
1154
1155 static void
1156 motion_grab_end(struct wl_grab *grab, uint32_t time)
1157 {
1158 }
1159
1160 static const struct wl_grab_interface motion_grab_interface = {
1161         motion_grab_motion,
1162         motion_grab_button,
1163         motion_grab_end
1164 };
1165
1166 WL_EXPORT void
1167 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1168 {
1169         if (compositor->idle_inhibit)
1170                 return;
1171
1172         wlsc_compositor_fade(compositor, 0.0);
1173         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1174
1175         wl_event_source_timer_update(compositor->idle_source,
1176                                      option_idle_time * 1000);
1177 }
1178
1179 static void
1180 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1181 {
1182         wlsc_compositor_wake(compositor);
1183         compositor->idle_inhibit++;
1184 }
1185
1186 static void
1187 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1188 {
1189         compositor->idle_inhibit--;
1190         wlsc_compositor_wake(compositor);
1191 }
1192
1193 static int
1194 idle_handler(void *data)
1195 {
1196         struct wlsc_compositor *compositor = data;
1197
1198         if (compositor->idle_inhibit)
1199                 return 1;
1200
1201         wlsc_compositor_fade(compositor, 1.0);
1202
1203         return 1;
1204 }
1205
1206 WL_EXPORT void
1207 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1208 {
1209         struct wlsc_surface *es;
1210         struct wlsc_compositor *ec =
1211                 (struct wlsc_compositor *) device->compositor;
1212         struct wlsc_output *output;
1213         const struct wl_grab_interface *interface;
1214         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1215         int32_t sx, sy;
1216         int x_valid = 0, y_valid = 0;
1217         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1218
1219         wlsc_compositor_wake(ec);
1220
1221         wl_list_for_each(output, &ec->output_list, link) {
1222                 if (output->x <= x && x <= output->x + output->current->width)
1223                         x_valid = 1;
1224
1225                 if (output->y <= y && y <= output->y + output->current->height)
1226                         y_valid = 1;
1227
1228                 /* FIXME: calculate this only on output addition/deletion */
1229                 if (output->x < min_x)
1230                         min_x = output->x;
1231                 if (output->y < min_y)
1232                         min_y = output->y;
1233
1234                 if (output->x + output->current->width > max_x)
1235                         max_x = output->x + output->current->width;
1236                 if (output->y + output->current->height > max_y)
1237                         max_y = output->y + output->current->height;
1238         }
1239
1240         if (!x_valid) {
1241                 if (x < min_x)
1242                         x = min_x;
1243                 else if (x >= max_x)
1244                         x = max_x;
1245         }
1246         if (!y_valid) {
1247                 if (y < min_y)
1248                         y = min_y;
1249                 else  if (y >= max_y)
1250                         y = max_y;
1251         }
1252
1253         device->x = x;
1254         device->y = y;
1255
1256         if (device->grab) {
1257                 interface = device->grab->interface;
1258                 interface->motion(device->grab, time, x, y);
1259         } else {
1260                 es = pick_surface(device, &sx, &sy);
1261                 wl_input_device_set_pointer_focus(device,
1262                                                   &es->surface,
1263                                                   time, x, y, sx, sy);
1264                 if (es)
1265                         wl_client_post_event(es->surface.client,
1266                                              &device->object,
1267                                              WL_INPUT_DEVICE_MOTION,
1268                                              time, x, y, sx, sy);
1269         }
1270
1271         wlsc_surface_damage_below(wd->sprite);
1272
1273         wd->sprite->x = device->x - wd->hotspot_x;
1274         wd->sprite->y = device->y - wd->hotspot_y;
1275
1276         wlsc_surface_damage(wd->sprite);
1277 }
1278
1279 WL_EXPORT void
1280 wlsc_surface_activate(struct wlsc_surface *surface,
1281                       struct wlsc_input_device *device, uint32_t time)
1282 {
1283         struct wlsc_shell *shell = surface->compositor->shell;
1284
1285         wlsc_surface_raise(surface);
1286         if (device->selection)
1287                 shell->set_selection_focus(shell,
1288                                            device->selection,
1289                                            &surface->surface, time);
1290
1291         wl_input_device_set_keyboard_focus(&device->input_device,
1292                                            &surface->surface,
1293                                            time);
1294 }
1295
1296 struct wlsc_binding {
1297         uint32_t key;
1298         uint32_t button;
1299         uint32_t modifier;
1300         wlsc_binding_handler_t handler;
1301         void *data;
1302         struct wl_list link;
1303 };
1304
1305 WL_EXPORT void
1306 notify_button(struct wl_input_device *device,
1307               uint32_t time, int32_t button, int32_t state)
1308 {
1309         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1310         struct wlsc_compositor *compositor =
1311                 (struct wlsc_compositor *) device->compositor;
1312         struct wlsc_binding *b;
1313         struct wlsc_surface *surface =
1314                 (struct wlsc_surface *) device->pointer_focus;
1315
1316         if (state)
1317                 wlsc_compositor_idle_inhibit(compositor);
1318         else
1319                 wlsc_compositor_idle_release(compositor);
1320
1321         if (state && surface && device->grab == NULL) {
1322                 wlsc_surface_activate(surface, wd, time);
1323                 wl_input_device_start_grab(device,
1324                                            &device->motion_grab,
1325                                            button, time);
1326         }
1327
1328         wl_list_for_each(b, &compositor->binding_list, link) {
1329                 if (b->button == button &&
1330                     b->modifier == wd->modifier_state && state) {
1331                         b->handler(&wd->input_device,
1332                                    time, 0, button, state, b->data);
1333                         break;
1334                 }
1335         }
1336
1337         if (device->grab)
1338                 device->grab->interface->button(device->grab, time,
1339                                                 button, state);
1340
1341         if (!state && device->grab && device->grab_button == button)
1342                 wl_input_device_end_grab(device, time);
1343 }
1344
1345 static void
1346 terminate_binding(struct wl_input_device *device, uint32_t time,
1347                   uint32_t key, uint32_t button, uint32_t state, void *data)
1348 {
1349         struct wlsc_compositor *compositor = data;
1350
1351         if (state)
1352                 wl_display_terminate(compositor->wl_display);
1353 }
1354
1355 WL_EXPORT struct wlsc_binding *
1356 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1357                             uint32_t key, uint32_t button, uint32_t modifier,
1358                             wlsc_binding_handler_t handler, void *data)
1359 {
1360         struct wlsc_binding *binding;
1361
1362         binding = malloc(sizeof *binding);
1363         if (binding == NULL)
1364                 return NULL;
1365
1366         binding->key = key;
1367         binding->button = button;
1368         binding->modifier = modifier;
1369         binding->handler = handler;
1370         binding->data = data;
1371         wl_list_insert(compositor->binding_list.prev, &binding->link);
1372
1373         return binding;
1374 }
1375
1376 WL_EXPORT void
1377 wlsc_binding_destroy(struct wlsc_binding *binding)
1378 {
1379         wl_list_remove(&binding->link);
1380         free(binding);
1381 }
1382
1383 static void
1384 update_modifier_state(struct wlsc_input_device *device,
1385                       uint32_t key, uint32_t state)
1386 {
1387         uint32_t modifier;
1388
1389         switch (key) {
1390         case KEY_LEFTCTRL:
1391         case KEY_RIGHTCTRL:
1392                 modifier = MODIFIER_CTRL;
1393                 break;
1394
1395         case KEY_LEFTALT:
1396         case KEY_RIGHTALT:
1397                 modifier = MODIFIER_ALT;
1398                 break;
1399
1400         case KEY_LEFTMETA:
1401         case KEY_RIGHTMETA:
1402                 modifier = MODIFIER_SUPER;
1403                 break;
1404
1405         default:
1406                 modifier = 0;
1407                 break;
1408         }
1409
1410         if (state)
1411                 device->modifier_state |= modifier;
1412         else
1413                 device->modifier_state &= ~modifier;
1414 }
1415
1416 WL_EXPORT void
1417 notify_key(struct wl_input_device *device,
1418            uint32_t time, uint32_t key, uint32_t state)
1419 {
1420         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1421         struct wlsc_compositor *compositor =
1422                 (struct wlsc_compositor *) device->compositor;
1423         uint32_t *k, *end;
1424         struct wlsc_binding *b;
1425
1426         if (state)
1427                 wlsc_compositor_idle_inhibit(compositor);
1428         else
1429                 wlsc_compositor_idle_release(compositor);
1430
1431         wl_list_for_each(b, &compositor->binding_list, link) {
1432                 if (b->key == key &&
1433                     b->modifier == wd->modifier_state) {
1434                         b->handler(&wd->input_device,
1435                                    time, key, 0, state, b->data);
1436                         break;
1437                 }
1438         }
1439
1440         update_modifier_state(wd, key, state);
1441         end = device->keys.data + device->keys.size;
1442         for (k = device->keys.data; k < end; k++) {
1443                 if (*k == key)
1444                         *k = *--end;
1445         }
1446         device->keys.size = (void *) end - device->keys.data;
1447         if (state) {
1448                 k = wl_array_add(&device->keys, sizeof *k);
1449                 *k = key;
1450         }
1451
1452         if (device->keyboard_focus != NULL)
1453                 wl_client_post_event(device->keyboard_focus->client,
1454                                      &device->object,
1455                                      WL_INPUT_DEVICE_KEY, time, key, state);
1456 }
1457
1458 WL_EXPORT void
1459 notify_pointer_focus(struct wl_input_device *device,
1460                      uint32_t time, struct wlsc_output *output,
1461                      int32_t x, int32_t y)
1462 {
1463         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1464         struct wlsc_compositor *compositor =
1465                 (struct wlsc_compositor *) device->compositor;
1466         struct wlsc_surface *es;
1467         int32_t sx, sy;
1468
1469         if (output) {
1470                 device->x = x;
1471                 device->y = y;
1472                 es = pick_surface(device, &sx, &sy);
1473                 wl_input_device_set_pointer_focus(device,
1474                                                   &es->surface,
1475                                                   time, x, y, sx, sy);
1476
1477                 compositor->focus = 1;
1478
1479                 wd->sprite->x = device->x - wd->hotspot_x;
1480                 wd->sprite->y = device->y - wd->hotspot_y;
1481         } else {
1482                 wl_input_device_set_pointer_focus(device, NULL,
1483                                                   time, 0, 0, 0, 0);
1484                 compositor->focus = 0;
1485         }
1486
1487         wlsc_surface_damage(wd->sprite);
1488 }
1489
1490 WL_EXPORT void
1491 notify_keyboard_focus(struct wl_input_device *device,
1492                       uint32_t time, struct wlsc_output *output,
1493                       struct wl_array *keys)
1494 {
1495         struct wlsc_input_device *wd =
1496                 (struct wlsc_input_device *) device;
1497         struct wlsc_compositor *compositor =
1498                 (struct wlsc_compositor *) device->compositor;
1499         struct wlsc_surface *es;
1500         uint32_t *k, *end;
1501
1502         if (!wl_list_empty(&compositor->surface_list))
1503                 es = container_of(compositor->surface_list.next,
1504                                   struct wlsc_surface, link);
1505         else
1506                 es = NULL;
1507
1508         if (output) {
1509                 wl_array_copy(&wd->input_device.keys, keys);
1510                 wd->modifier_state = 0;
1511                 end = device->keys.data + device->keys.size;
1512                 for (k = device->keys.data; k < end; k++) {
1513                         wlsc_compositor_idle_inhibit(compositor);
1514                         update_modifier_state(wd, *k, 1);
1515                 }
1516
1517                 if (es->surface.client)
1518                         wl_input_device_set_keyboard_focus(&wd->input_device,
1519                                                            &es->surface, time);
1520         } else {
1521                 end = device->keys.data + device->keys.size;
1522                 for (k = device->keys.data; k < end; k++)
1523                         wlsc_compositor_idle_release(compositor);
1524
1525                 wd->modifier_state = 0;
1526                 wl_input_device_set_keyboard_focus(&wd->input_device,
1527                                                    NULL, time);
1528         }
1529 }
1530
1531
1532 static void
1533 input_device_attach(struct wl_client *client,
1534                     struct wl_input_device *device_base,
1535                     uint32_t time,
1536                     struct wl_buffer *buffer, int32_t x, int32_t y)
1537 {
1538         struct wlsc_input_device *device =
1539                 (struct wlsc_input_device *) device_base;
1540
1541         if (time < device->input_device.pointer_focus_time)
1542                 return;
1543         if (device->input_device.pointer_focus == NULL)
1544                 return;
1545         if (device->input_device.pointer_focus->client != client)
1546                 return;
1547
1548         if (buffer == NULL) {
1549                 wlsc_input_device_set_pointer_image(device,
1550                                                     WLSC_POINTER_LEFT_PTR);
1551                 return;
1552         }
1553
1554         wlsc_input_device_attach_buffer(device, buffer, x, y);
1555 }
1556
1557 const static struct wl_input_device_interface input_device_interface = {
1558         input_device_attach,
1559 };
1560
1561 WL_EXPORT void
1562 wlsc_input_device_init(struct wlsc_input_device *device,
1563                        struct wlsc_compositor *ec)
1564 {
1565         wl_input_device_init(&device->input_device, &ec->compositor);
1566
1567         device->input_device.object.interface = &wl_input_device_interface;
1568         device->input_device.object.implementation =
1569                 (void (**)(void)) &input_device_interface;
1570         wl_display_add_object(ec->wl_display, &device->input_device.object);
1571         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1572
1573         device->sprite = wlsc_surface_create(ec,
1574                                              device->input_device.x,
1575                                              device->input_device.y, 32, 32);
1576         wl_list_insert(&ec->surface_list, &device->sprite->link);
1577
1578         device->hotspot_x = 16;
1579         device->hotspot_y = 16;
1580         device->modifier_state = 0;
1581
1582         device->input_device.motion_grab.interface = &motion_grab_interface;
1583
1584         wl_list_insert(ec->input_device_list.prev, &device->link);
1585
1586         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1587 }
1588
1589 static void
1590 wlsc_output_post_geometry(struct wl_client *client,
1591                           struct wl_object *global, uint32_t version)
1592 {
1593         struct wlsc_output *output =
1594                 container_of(global, struct wlsc_output, object);
1595         struct wlsc_mode *mode;
1596
1597         wl_client_post_event(client, global,
1598                              WL_OUTPUT_GEOMETRY,
1599                              output->x,
1600                              output->y,
1601                              output->mm_width,
1602                              output->mm_height,
1603                              output->subpixel,
1604                              output->make, output->model);
1605
1606         wl_list_for_each (mode, &output->mode_list, link) {
1607                 wl_client_post_event(client, global,
1608                                      WL_OUTPUT_MODE,
1609                                      mode->flags,
1610                                      mode->width, mode->height, mode->refresh);
1611         }
1612 }
1613
1614 static const char vertex_shader[] =
1615         "uniform mat4 proj;\n"
1616         "attribute vec2 position;\n"
1617         "attribute vec2 texcoord;\n"
1618         "varying vec2 v_texcoord;\n"
1619         "void main()\n"
1620         "{\n"
1621         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1622         "   v_texcoord = texcoord;\n"
1623         "}\n";
1624
1625 static const char texture_fragment_shader[] =
1626         "precision mediump float;\n"
1627         "varying vec2 v_texcoord;\n"
1628         "uniform sampler2D tex;\n"
1629         "void main()\n"
1630         "{\n"
1631         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1632         "}\n";
1633
1634 static const char solid_fragment_shader[] =
1635         "precision mediump float;\n"
1636         "uniform vec4 color;\n"
1637         "void main()\n"
1638         "{\n"
1639         "   gl_FragColor = color\n;"
1640         "}\n";
1641
1642 static int
1643 compile_shader(GLenum type, const char *source)
1644 {
1645         GLuint s;
1646         char msg[512];
1647         GLint status;
1648
1649         s = glCreateShader(type);
1650         glShaderSource(s, 1, &source, NULL);
1651         glCompileShader(s);
1652         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1653         if (!status) {
1654                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1655                 fprintf(stderr, "shader info: %s\n", msg);
1656                 return GL_NONE;
1657         }
1658
1659         return s;
1660 }
1661
1662 static int
1663 wlsc_shader_init(struct wlsc_shader *shader,
1664                  const char *vertex_source, const char *fragment_source)
1665 {
1666         char msg[512];
1667         GLint status;
1668
1669         shader->vertex_shader =
1670                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1671         shader->fragment_shader =
1672                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1673
1674         shader->program = glCreateProgram();
1675         glAttachShader(shader->program, shader->vertex_shader);
1676         glAttachShader(shader->program, shader->fragment_shader);
1677         glBindAttribLocation(shader->program, 0, "position");
1678         glBindAttribLocation(shader->program, 1, "texcoord");
1679
1680         glLinkProgram(shader->program);
1681         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1682         if (!status) {
1683                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1684                 fprintf(stderr, "link info: %s\n", msg);
1685                 return -1;
1686         }
1687
1688         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1689         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1690
1691         return 0;
1692 }
1693
1694 static int
1695 init_solid_shader(struct wlsc_shader *shader,
1696                   GLuint vertex_shader, const char *fragment_source)
1697 {
1698         GLint status;
1699         char msg[512];
1700
1701         shader->vertex_shader = vertex_shader;
1702         shader->fragment_shader =
1703                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1704
1705         shader->program = glCreateProgram();
1706         glAttachShader(shader->program, shader->vertex_shader);
1707         glAttachShader(shader->program, shader->fragment_shader);
1708         glBindAttribLocation(shader->program, 0, "position");
1709         glBindAttribLocation(shader->program, 1, "texcoord");
1710
1711         glLinkProgram(shader->program);
1712         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1713         if (!status) {
1714                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1715                 fprintf(stderr, "link info: %s\n", msg);
1716                 return -1;
1717         }
1718
1719         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1720         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1721
1722         return 0;
1723 }
1724
1725 WL_EXPORT void
1726 wlsc_output_destroy(struct wlsc_output *output)
1727 {
1728         pixman_region32_fini(&output->region);
1729         pixman_region32_fini(&output->previous_damage);
1730         destroy_surface(&output->background->surface.resource, NULL);
1731 }
1732
1733 WL_EXPORT void
1734 wlsc_output_move(struct wlsc_output *output, int x, int y)
1735 {
1736         struct wlsc_compositor *c = output->compositor;
1737         int flip;
1738
1739         output->x = x;
1740         output->y = y;
1741
1742         if (output->background) {
1743                 output->background->x = x;
1744                 output->background->y = y;
1745         }
1746
1747         pixman_region32_init(&output->previous_damage);
1748         pixman_region32_init_rect(&output->region, x, y,
1749                                   output->current->width,
1750                                   output->current->height);
1751
1752         wlsc_matrix_init(&output->matrix);
1753         wlsc_matrix_translate(&output->matrix,
1754                               -output->x - output->current->width / 2.0,
1755                               -output->y - output->current->height / 2.0, 0);
1756
1757         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1758         wlsc_matrix_scale(&output->matrix,
1759                           2.0 / output->current->width,
1760                           flip * 2.0 / output->current->height, 1);
1761
1762         pixman_region32_union(&c->damage, &c->damage, &output->region);
1763 }
1764
1765 WL_EXPORT void
1766 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1767                  int x, int y, int width, int height, uint32_t flags)
1768 {
1769         output->compositor = c;
1770         output->x = x;
1771         output->y = y;
1772         output->mm_width = width;
1773         output->mm_height = height;
1774
1775         output->background =
1776                 background_create(output, option_background);
1777
1778         if (output->background != NULL)
1779                 wl_list_insert(c->surface_list.prev,
1780                                &output->background->link);
1781
1782         output->flags = flags;
1783         wlsc_output_move(output, x, y);
1784
1785         output->scanout_buffer_destroy_listener.func =
1786                 output_handle_scanout_buffer_destroy;
1787         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1788
1789         output->object.interface = &wl_output_interface;
1790         wl_display_add_object(c->wl_display, &output->object);
1791         wl_display_add_global(c->wl_display, &output->object,
1792                               wlsc_output_post_geometry);
1793 }
1794
1795 static void
1796 shm_buffer_created(struct wl_buffer *buffer)
1797 {
1798         struct wl_list *surfaces_attached_to;
1799
1800         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1801         if (!surfaces_attached_to) {
1802                 buffer->user_data = NULL;
1803                 return;
1804         }
1805
1806         wl_list_init(surfaces_attached_to);
1807
1808         buffer->user_data = surfaces_attached_to;
1809 }
1810
1811 static void
1812 shm_buffer_damaged(struct wl_buffer *buffer,
1813                    int32_t x, int32_t y, int32_t width, int32_t height)
1814 {
1815         struct wl_list *surfaces_attached_to = buffer->user_data;
1816         struct wlsc_surface *es;
1817         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1818
1819         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1820                 glBindTexture(GL_TEXTURE_2D, es->texture);
1821                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1822                              tex_width, buffer->height, 0,
1823                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1824                              wl_shm_buffer_get_data(buffer));
1825                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1826                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1827         }
1828 }
1829
1830 static void
1831 shm_buffer_destroyed(struct wl_buffer *buffer)
1832 {
1833         struct wl_list *surfaces_attached_to = buffer->user_data;
1834         struct wlsc_surface *es, *next;
1835
1836         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1837                 wl_list_remove(&es->buffer_link);
1838                 wl_list_init(&es->buffer_link);
1839         }
1840
1841         free(surfaces_attached_to);
1842 }
1843
1844 const static struct wl_shm_callbacks shm_callbacks = {
1845         shm_buffer_created,
1846         shm_buffer_damaged,
1847         shm_buffer_destroyed
1848 };
1849
1850 WL_EXPORT int
1851 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1852 {
1853         struct wl_event_loop *loop;
1854         const char *extensions;
1855
1856         ec->wl_display = display;
1857
1858         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1859
1860         ec->shm = wl_shm_init(display, &shm_callbacks);
1861
1862         ec->image_target_texture_2d =
1863                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1864         ec->image_target_renderbuffer_storage = (void *)
1865                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1866         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1867         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1868         ec->bind_display =
1869                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1870         ec->unbind_display =
1871                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1872
1873         extensions = (const char *) glGetString(GL_EXTENSIONS);
1874         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1875                 fprintf(stderr,
1876                         "GL_EXT_texture_format_BGRA8888 not available\n");
1877                 return -1;
1878         }
1879
1880         extensions =
1881                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1882         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1883                 ec->has_bind_display = 1;
1884         if (ec->has_bind_display)
1885                 ec->bind_display(ec->display, ec->wl_display);
1886
1887         wl_list_init(&ec->surface_list);
1888         wl_list_init(&ec->input_device_list);
1889         wl_list_init(&ec->output_list);
1890         wl_list_init(&ec->binding_list);
1891         wl_list_init(&ec->animation_list);
1892         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1893         ec->fade.animation.frame = fade_frame;
1894         wl_list_init(&ec->fade.animation.link);
1895
1896         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1897                                     MODIFIER_CTRL | MODIFIER_ALT,
1898                                     terminate_binding, ec);
1899
1900         create_pointer_images(ec);
1901
1902         screenshooter_create(ec);
1903
1904         glActiveTexture(GL_TEXTURE0);
1905
1906         if (wlsc_shader_init(&ec->texture_shader,
1907                              vertex_shader, texture_fragment_shader) < 0)
1908                 return -1;
1909         if (init_solid_shader(&ec->solid_shader,
1910                               ec->texture_shader.vertex_shader,
1911                               solid_fragment_shader) < 0)
1912                 return -1;
1913
1914         loop = wl_display_get_event_loop(ec->wl_display);
1915         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1916         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1917
1918         pixman_region32_init(&ec->damage);
1919         wlsc_compositor_schedule_repaint(ec);
1920
1921         return 0;
1922 }
1923
1924 static int on_term_signal(int signal_number, void *data)
1925 {
1926         struct wlsc_compositor *ec = data;
1927
1928         wl_display_terminate(ec->wl_display);
1929
1930         return 1;
1931 }
1932
1933 static void *
1934 load_module(const char *name, const char *entrypoint, void **handle)
1935 {
1936         char path[PATH_MAX];
1937         void *module, *init;
1938
1939         if (name[0] != '/')
1940                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1941         else
1942                 snprintf(path, sizeof path, "%s", name);
1943
1944         module = dlopen(path, RTLD_LAZY);
1945         if (!module) {
1946                 fprintf(stderr,
1947                         "failed to load module: %s\n", dlerror());
1948                 return NULL;
1949         }
1950
1951         init = dlsym(module, entrypoint);
1952         if (!init) {
1953                 fprintf(stderr,
1954                         "failed to lookup init function: %s\n", dlerror());
1955                 return NULL;
1956         }
1957
1958         return init;
1959 }
1960
1961 int main(int argc, char *argv[])
1962 {
1963         struct wl_display *display;
1964         struct wlsc_compositor *ec;
1965         struct wl_event_loop *loop;
1966         int o, xserver = 0;
1967         void *shell_module, *backend_module;
1968         int (*shell_init)(struct wlsc_compositor *ec);
1969         struct wlsc_compositor
1970                 *(*backend_init)(struct wl_display *display, char *options);
1971         char *backend = NULL;
1972         char *backend_options = "";
1973         char *shell = NULL;
1974         char *p;
1975
1976         static const char opts[] = "B:b:o:S:i:s:x";
1977         static const struct option longopts[ ] = {
1978                 { "backend", 1, NULL, 'B' },
1979                 { "backend-options", 1, NULL, 'o' },
1980                 { "background", 1, NULL, 'b' },
1981                 { "socket", 1, NULL, 'S' },
1982                 { "idle-time", 1, NULL, 'i' },
1983                 { "shell", 1, NULL, 's' },
1984                 { "xserver", 0, NULL, 'x' },
1985                 { NULL, }
1986         };
1987
1988         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1989                 switch (o) {
1990                 case 'b':
1991                         option_background = optarg;
1992                         break;
1993                 case 'B':
1994                         backend = optarg;
1995                         break;
1996                 case 'o':
1997                         backend_options = optarg;
1998                         break;
1999                 case 'S':
2000                         option_socket_name = optarg;
2001                         break;
2002                 case 'i':
2003                         option_idle_time = strtol(optarg, &p, 0);
2004                         if (*p != '\0') {
2005                                 fprintf(stderr,
2006                                         "invalid idle time option: %s\n",
2007                                         optarg);
2008                                 exit(EXIT_FAILURE);
2009                         }
2010                         break;
2011                 case 's':
2012                         shell = optarg;
2013                         break;
2014                 case 'x':
2015                         xserver = 1;
2016                         break;
2017                 }
2018         }
2019
2020         display = wl_display_create();
2021
2022         ec = NULL;
2023
2024         if (!backend) {
2025                 if (getenv("WAYLAND_DISPLAY"))
2026                         backend = "wayland-backend.so";
2027                 else if (getenv("DISPLAY"))
2028                         backend = "x11-backend.so";
2029                 else if (getenv("OPENWFD"))
2030                         backend = "openwfd-backend.so";
2031                 else
2032                         backend = "drm-backend.so";
2033         }
2034
2035         if (!shell)
2036                 shell = "desktop-shell.so";
2037
2038         backend_init = load_module(backend, "backend_init", &backend_module);
2039         if (!backend_init)
2040                 exit(EXIT_FAILURE);
2041
2042         shell_init = load_module(shell, "shell_init", &shell_module);
2043         if (!shell_init)
2044                 exit(EXIT_FAILURE);
2045
2046         ec = backend_init(display, backend_options);
2047         if (ec == NULL) {
2048                 fprintf(stderr, "failed to create compositor\n");
2049                 exit(EXIT_FAILURE);
2050         }
2051
2052         if (shell_init(ec) < 0)
2053                 exit(EXIT_FAILURE);
2054
2055         if (xserver)
2056                 wlsc_xserver_init(display);
2057
2058         if (wl_display_add_socket(display, option_socket_name)) {
2059                 fprintf(stderr, "failed to add socket: %m\n");
2060                 exit(EXIT_FAILURE);
2061         }
2062
2063         loop = wl_display_get_event_loop(ec->wl_display);
2064         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2065         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2066
2067         wl_list_init(&child_process_list);
2068         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2069
2070         wl_display_run(display);
2071
2072         if (ec->has_bind_display)
2073                 ec->unbind_display(ec->display, display);
2074         wl_display_destroy(display);
2075
2076         ec->destroy(ec);
2077
2078         return 0;
2079 }