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 }
 690
 691 WL_EXPORT void
 692 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 693 {
 694         struct wlsc_output *output;
 695
 696         wl_list_for_each(output, &compositor->output_list, link)
 697                 wlsc_output_damage(output);
 698 }
 699
 700 static inline void
 701 wlsc_buffer_post_release(struct wl_buffer *buffer)
 702 {
 703         if (buffer == NULL || --buffer->busy_count > 0)
 704                 return;
 705
 706         assert(buffer->client != NULL);
 707         wl_client_post_event(buffer->client,
 708                              &buffer->resource.object,
 709                              WL_BUFFER_RELEASE);
 710 }
 711
 712 WL_EXPORT void
 713 wlsc_output_damage(struct wlsc_output *output)
 714 {
 715         struct wlsc_compositor *compositor = output->compositor;
 716
 717         pixman_region32_union(&compositor->damage,
 718                               &compositor->damage, &output->region);
 719         wlsc_compositor_schedule_repaint(compositor);
 720 }
 721
 722 static void
 723 fade_frame(struct wlsc_animation *animation,
 724            struct wlsc_output *output, uint32_t msecs)
 725 {
 726         struct wlsc_compositor *compositor =
 727                 container_of(animation,
 728                              struct wlsc_compositor, fade.animation);
 729
 730         wlsc_spring_update(&compositor->fade.spring, msecs);
 731         if (wlsc_spring_done(&compositor->fade.spring)) {
 732                 if (compositor->fade.spring.current > 0.999) {
 733                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 734                         compositor->shell->lock(compositor->shell);
 735                 }
 736                 compositor->fade.spring.current =
 737                         compositor->fade.spring.target;
 738                 wl_list_remove(&animation->link);
 739                 wl_list_init(&animation->link);
 740         }
 741
 742         wlsc_output_damage(output);
 743 }
 744
 745 static void
 746 fade_output(struct wlsc_output *output,
 747             GLfloat tint, pixman_region32_t *region)
 748 {
 749         struct wlsc_compositor *compositor = output->compositor;
 750         struct wlsc_surface surface;
 751         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 752
 753         surface.compositor = compositor;
 754         surface.x = output->x;
 755         surface.y = output->y;
 756         surface.width = output->current->width;
 757         surface.height = output->current->height;
 758         surface.texture = GL_NONE;
 759         surface.transform = NULL;
 760
 761         if (tint <= 1.0)
 762                 surface.visual =
 763                         &compositor->compositor.premultiplied_argb_visual;
 764         else
 765                 surface.visual = &compositor->compositor.rgb_visual;
 766
 767         glUseProgram(compositor->solid_shader.program);
 768         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 769                            1, GL_FALSE, output->matrix.d);
 770         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 771         wlsc_surface_draw(&surface, output, region);
 772 }
 773
 774 static void
 775 wlsc_output_repaint(struct wlsc_output *output)
 776 {
 777         struct wlsc_compositor *ec = output->compositor;
 778         struct wlsc_surface *es;
 779         struct wlsc_input_device *device;
 780         pixman_region32_t clip, new_damage, total_damage;
 781
 782         output->prepare_render(output);
 783
 784         glViewport(0, 0, output->current->width, output->current->height);
 785
 786         glUseProgram(ec->texture_shader.program);
 787         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 788                            1, GL_FALSE, output->matrix.d);
 789         glUniform1i(ec->texture_shader.tex_uniform, 0);
 790
 791         pixman_region32_init(&new_damage);
 792         pixman_region32_intersect(&new_damage, &ec->damage, &output->region);
 793         pixman_region32_init(&clip);
 794         pixman_region32_copy(&clip, &output->region);
 795         wl_list_for_each(es, &ec->surface_list, link) {
 796                 pixman_region32_intersect(&es->damage, &es->damage, &clip);
 797                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 798                 pixman_region32_subtract(&clip, &clip, &es->opaque);
 799         }
 800
 801         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 802         pixman_region32_init(&total_damage);
 803         pixman_region32_union(&total_damage, &new_damage,
 804                               &output->previous_damage);
 805         pixman_region32_copy(&output->previous_damage, &new_damage);
 806
 807         pixman_region32_fini(&clip);
 808         pixman_region32_fini(&new_damage);
 809
 810         device = (struct wlsc_input_device *) ec->input_device;
 811         if (ec->focus && ec->fade.spring.current < 0.001) {
 812                 if (!wl_list_empty(&device->sprite->link)) {
 813                         wl_list_remove(&device->sprite->link);
 814                         wl_list_init(&device->sprite->link);
 815                 }
 816                 if (output->set_hardware_cursor(output, device) < 0)
 817                         wl_list_insert(&ec->surface_list,
 818                                        &device->sprite->link);
 819         } else {
 820                 output->set_hardware_cursor(output, NULL);
 821                 if (wl_list_empty(&device->sprite->link))
 822                         wl_list_insert(&ec->surface_list,
 823                                        &device->sprite->link);
 824         }
 825
 826         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 827
 828         if (es->visual == &ec->compositor.rgb_visual &&
 829             output->prepare_scanout_surface(output, es) == 0) {
 830                 /* We're drawing nothing now,
 831                  * draw the damaged regions later. */
 832                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 833
 834                 output->scanout_buffer = es->buffer;
 835                 output->scanout_buffer->busy_count++;
 836
 837                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 838                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 839                                &output->scanout_buffer_destroy_listener.link);
 840
 841                 return;
 842         }
 843
 844         if (es->fullscreen_output == output) {
 845                 if (es->width < output->current->width ||
 846                     es->height < output->current->height)
 847                         glClear(GL_COLOR_BUFFER_BIT);
 848                 wlsc_surface_draw(es, output, &total_damage);
 849         } else {
 850                 wl_list_for_each(es, &ec->surface_list, link) {
 851                         pixman_region32_copy(&es->damage, &total_damage);
 852                         pixman_region32_subtract(&total_damage, &total_damage, &es->opaque);
 853                 }
 854
 855                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 856                         wlsc_surface_draw(es, output, &es->damage);
 857                         pixman_region32_fini(&es->damage);
 858                         pixman_region32_init(&es->damage);
 859                 }
 860         }
 861
 862         if (ec->fade.spring.current > 0.001)
 863                 fade_output(output, ec->fade.spring.current, &total_damage);
 864 }
 865
 866 static void
 867 repaint(void *data, int msecs)
 868 {
 869         struct wlsc_output *output = data;
 870         struct wlsc_compositor *compositor = output->compositor;
 871         struct wlsc_surface *es;
 872         struct wlsc_animation *animation, *next;
 873
 874         wlsc_output_repaint(output);
 875         output->repaint_needed = 0;
 876         output->repaint_scheduled = 1;
 877         output->present(output);
 878
 879         /* FIXME: Keep the surfaces in an per-output list. */
 880         wl_list_for_each(es, &compositor->surface_list, link) {
 881                 if (es->output == output) {
 882                         wl_display_post_frame(compositor->wl_display,
 883                                               &es->surface, msecs);
 884                 }
 885         }
 886
 887         wl_list_for_each_safe(animation, next,
 888                               &compositor->animation_list, link)
 889                 animation->frame(animation, output, msecs);
 890 }
 891
 892 static void
 893 idle_repaint(void *data)
 894 {
 895         repaint(data, wlsc_compositor_get_time());
 896 }
 897
 898 WL_EXPORT void
 899 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 900 {
 901         wlsc_buffer_post_release(output->scanout_buffer);
 902         output->scanout_buffer = NULL;
 903         output->repaint_scheduled = 0;
 904
 905         if (output->repaint_needed)
 906                 repaint(output, msecs);
 907 }
 908
 909 WL_EXPORT void
 910 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 911 {
 912         struct wlsc_output *output;
 913         struct wl_event_loop *loop;
 914
 915         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 916                 return;
 917
 918         loop = wl_display_get_event_loop(compositor->wl_display);
 919         wl_list_for_each(output, &compositor->output_list, link) {
 920                 output->repaint_needed = 1;
 921                 if (output->repaint_scheduled)
 922                         continue;
 923
 924                 wl_event_loop_add_idle(loop, idle_repaint, output);
 925                 output->repaint_scheduled = 1;
 926         }
 927 }
 928
 929 WL_EXPORT void
 930 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 931 {
 932         int done;
 933
 934         done = wlsc_spring_done(&compositor->fade.spring);
 935         compositor->fade.spring.target = tint;
 936         if (wlsc_spring_done(&compositor->fade.spring))
 937                 return;
 938
 939         if (done)
 940                 compositor->fade.spring.timestamp =
 941                         wlsc_compositor_get_time();
 942
 943         wlsc_compositor_damage_all(compositor);
 944         if (wl_list_empty(&compositor->fade.animation.link))
 945                 wl_list_insert(compositor->animation_list.prev,
 946                                &compositor->fade.animation.link);
 947 }
 948
 949 static void
 950 surface_destroy(struct wl_client *client,
 951                 struct wl_surface *surface)
 952 {
 953         wl_resource_destroy(&surface->resource, client,
 954                             wlsc_compositor_get_time());
 955 }
 956
 957 WL_EXPORT void
 958 wlsc_surface_assign_output(struct wlsc_surface *es)
 959 {
 960         struct wlsc_compositor *ec = es->compositor;
 961         struct wlsc_output *output;
 962
 963         struct wlsc_output *tmp = es->output;
 964         es->output = NULL;
 965
 966         wl_list_for_each(output, &ec->output_list, link) {
 967                 if (pixman_region32_contains_point(&output->region,
 968                                                    es->x, es->y, NULL)) {
 969                         if (output != tmp)
 970                                 printf("assiging surface %p to output %p\n",
 971                                        es, output);
 972                         es->output = output;
 973                 }
 974         }
 975
 976         if (es->output == NULL) {
 977                 printf("no output found\n");
 978                 es->output = container_of(ec->output_list.next,
 979                                           struct wlsc_output, link);
 980         }
 981 }
 982
 983 static void
 984 surface_attach(struct wl_client *client,
 985                struct wl_surface *surface, struct wl_buffer *buffer,
 986                int32_t x, int32_t y)
 987 {
 988         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 989
 990         buffer->busy_count++;
 991         wlsc_buffer_post_release(es->buffer);
 992
 993         es->buffer = buffer;
 994         wl_list_remove(&es->buffer_destroy_listener.link);
 995         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 996                        &es->buffer_destroy_listener.link);
 997
 998         if (es->visual == NULL)
 999                 wl_list_insert(&es->compositor->surface_list, &es->link);
1000
1001         wlsc_surface_configure(es, es->x + x, es->y + y,
1002                                buffer->width, buffer->height);
1003
1004         wlsc_buffer_attach(buffer, surface);
1005
1006         es->compositor->shell->attach(es->compositor->shell, es);
1007 }
1008
1009 static void
1010 surface_damage(struct wl_client *client,
1011                struct wl_surface *surface,
1012                int32_t x, int32_t y, int32_t width, int32_t height)
1013 {
1014         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1015
1016         wlsc_surface_damage_rectangle(es, x, y, width, height);
1017 }
1018
1019 const static struct wl_surface_interface surface_interface = {
1020         surface_destroy,
1021         surface_attach,
1022         surface_damage
1023 };
1024
1025 static void
1026 wlsc_input_device_attach(struct wlsc_input_device *device,
1027                          int x, int y, int width, int height)
1028 {
1029         wlsc_surface_damage_below(device->sprite);
1030
1031         device->hotspot_x = x;
1032         device->hotspot_y = y;
1033
1034         device->sprite->x = device->input_device.x - device->hotspot_x;
1035         device->sprite->y = device->input_device.y - device->hotspot_y;
1036         device->sprite->width = width;
1037         device->sprite->height = height;
1038
1039         wlsc_surface_damage(device->sprite);
1040 }
1041
1042 static void
1043 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1044                                 struct wl_buffer *buffer, int x, int y)
1045 {
1046         wlsc_buffer_attach(buffer, &device->sprite->surface);
1047         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1048 }
1049
1050 static void
1051 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1052                                 struct wlsc_sprite *sprite, int x, int y)
1053 {
1054         wlsc_sprite_attach(sprite, &device->sprite->surface);
1055         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1056 }
1057
1058 WL_EXPORT void
1059 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1060                                     enum wlsc_pointer_type type)
1061 {
1062         struct wlsc_compositor *compositor =
1063                 (struct wlsc_compositor *) device->input_device.compositor;
1064
1065         wlsc_input_device_attach_sprite(device,
1066                                         compositor->pointer_sprites[type],
1067                                         pointer_images[type].hotspot_x,
1068                                         pointer_images[type].hotspot_y);
1069 }
1070
1071 static void
1072 compositor_create_surface(struct wl_client *client,
1073                           struct wl_compositor *compositor, uint32_t id)
1074 {
1075         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1076         struct wlsc_surface *surface;
1077
1078         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1079         if (surface == NULL) {
1080                 wl_client_post_no_memory(client);
1081                 return;
1082         }
1083
1084         surface->surface.resource.destroy = destroy_surface;
1085
1086         surface->surface.resource.object.id = id;
1087         surface->surface.resource.object.interface = &wl_surface_interface;
1088         surface->surface.resource.object.implementation =
1089                 (void (**)(void)) &surface_interface;
1090         surface->surface.client = client;
1091
1092         wl_client_add_resource(client, &surface->surface.resource);
1093 }
1094
1095 const static struct wl_compositor_interface compositor_interface = {
1096         compositor_create_surface,
1097 };
1098
1099 static void
1100 wlsc_surface_transform(struct wlsc_surface *surface,
1101                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1102 {
1103         *sx = x - surface->x;
1104         *sy = y - surface->y;
1105 }
1106
1107 WL_EXPORT struct wlsc_surface *
1108 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1109 {
1110         struct wlsc_compositor *ec =
1111                 (struct wlsc_compositor *) device->compositor;
1112         struct wlsc_surface *es;
1113
1114         wl_list_for_each(es, &ec->surface_list, link) {
1115                 if (es->surface.client == NULL)
1116                         continue;
1117                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1118                 if (0 <= *sx && *sx < es->width &&
1119                     0 <= *sy && *sy < es->height)
1120                         return es;
1121         }
1122
1123         return NULL;
1124 }
1125
1126
1127 static void
1128 motion_grab_motion(struct wl_grab *grab,
1129                    uint32_t time, int32_t x, int32_t y)
1130 {
1131         struct wlsc_input_device *device =
1132                 (struct wlsc_input_device *) grab->input_device;
1133         struct wlsc_surface *es =
1134                 (struct wlsc_surface *) device->input_device.pointer_focus;
1135         int32_t sx, sy;
1136
1137         wlsc_surface_transform(es, x, y, &sx, &sy);
1138         wl_client_post_event(es->surface.client,
1139                              &device->input_device.object,
1140                              WL_INPUT_DEVICE_MOTION,
1141                              time, x, y, sx, sy);
1142 }
1143
1144 static void
1145 motion_grab_button(struct wl_grab *grab,
1146                    uint32_t time, int32_t button, int32_t state)
1147 {
1148         wl_client_post_event(grab->input_device->pointer_focus->client,
1149                              &grab->input_device->object,
1150                              WL_INPUT_DEVICE_BUTTON,
1151                              time, button, state);
1152 }
1153
1154 static void
1155 motion_grab_end(struct wl_grab *grab, uint32_t time)
1156 {
1157 }
1158
1159 static const struct wl_grab_interface motion_grab_interface = {
1160         motion_grab_motion,
1161         motion_grab_button,
1162         motion_grab_end
1163 };
1164
1165 WL_EXPORT void
1166 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1167 {
1168         if (compositor->idle_inhibit)
1169                 return;
1170
1171         wlsc_compositor_fade(compositor, 0.0);
1172         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1173
1174         wl_event_source_timer_update(compositor->idle_source,
1175                                      option_idle_time * 1000);
1176 }
1177
1178 static void
1179 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1180 {
1181         wlsc_compositor_wake(compositor);
1182         compositor->idle_inhibit++;
1183 }
1184
1185 static void
1186 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1187 {
1188         compositor->idle_inhibit--;
1189         wlsc_compositor_wake(compositor);
1190 }
1191
1192 static int
1193 idle_handler(void *data)
1194 {
1195         struct wlsc_compositor *compositor = data;
1196
1197         if (compositor->idle_inhibit)
1198                 return 1;
1199
1200         wlsc_compositor_fade(compositor, 1.0);
1201
1202         return 1;
1203 }
1204
1205 WL_EXPORT void
1206 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1207 {
1208         struct wlsc_surface *es;
1209         struct wlsc_compositor *ec =
1210                 (struct wlsc_compositor *) device->compositor;
1211         struct wlsc_output *output;
1212         const struct wl_grab_interface *interface;
1213         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1214         int32_t sx, sy;
1215         int x_valid = 0, y_valid = 0;
1216         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1217
1218         wlsc_compositor_wake(ec);
1219
1220         wl_list_for_each(output, &ec->output_list, link) {
1221                 if (output->x <= x && x <= output->x + output->current->width)
1222                         x_valid = 1;
1223
1224                 if (output->y <= y && y <= output->y + output->current->height)
1225                         y_valid = 1;
1226
1227                 /* FIXME: calculate this only on output addition/deletion */
1228                 if (output->x < min_x)
1229                         min_x = output->x;
1230                 if (output->y < min_y)
1231                         min_y = output->y;
1232
1233                 if (output->x + output->current->width > max_x)
1234                         max_x = output->x + output->current->width;
1235                 if (output->y + output->current->height > max_y)
1236                         max_y = output->y + output->current->height;
1237         }
1238
1239         if (!x_valid) {
1240                 if (x < min_x)
1241                         x = min_x;
1242                 else if (x >= max_x)
1243                         x = max_x;
1244         }
1245         if (!y_valid) {
1246                 if (y < min_y)
1247                         y = min_y;
1248                 else  if (y >= max_y)
1249                         y = max_y;
1250         }
1251
1252         device->x = x;
1253         device->y = y;
1254
1255         if (device->grab) {
1256                 interface = device->grab->interface;
1257                 interface->motion(device->grab, time, x, y);
1258         } else {
1259                 es = pick_surface(device, &sx, &sy);
1260                 wl_input_device_set_pointer_focus(device,
1261                                                   &es->surface,
1262                                                   time, x, y, sx, sy);
1263                 if (es)
1264                         wl_client_post_event(es->surface.client,
1265                                              &device->object,
1266                                              WL_INPUT_DEVICE_MOTION,
1267                                              time, x, y, sx, sy);
1268         }
1269
1270         wlsc_surface_damage_below(wd->sprite);
1271
1272         wd->sprite->x = device->x - wd->hotspot_x;
1273         wd->sprite->y = device->y - wd->hotspot_y;
1274
1275         wlsc_surface_damage(wd->sprite);
1276 }
1277
1278 WL_EXPORT void
1279 wlsc_surface_activate(struct wlsc_surface *surface,
1280                       struct wlsc_input_device *device, uint32_t time)
1281 {
1282         struct wlsc_shell *shell = surface->compositor->shell;
1283
1284         wlsc_surface_raise(surface);
1285         if (device->selection)
1286                 shell->set_selection_focus(shell,
1287                                            device->selection,
1288                                            &surface->surface, time);
1289
1290         wl_input_device_set_keyboard_focus(&device->input_device,
1291                                            &surface->surface,
1292                                            time);
1293 }
1294
1295 struct wlsc_binding {
1296         uint32_t key;
1297         uint32_t button;
1298         uint32_t modifier;
1299         wlsc_binding_handler_t handler;
1300         void *data;
1301         struct wl_list link;
1302 };
1303
1304 WL_EXPORT void
1305 notify_button(struct wl_input_device *device,
1306               uint32_t time, int32_t button, int32_t state)
1307 {
1308         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1309         struct wlsc_compositor *compositor =
1310                 (struct wlsc_compositor *) device->compositor;
1311         struct wlsc_binding *b;
1312         struct wlsc_surface *surface =
1313                 (struct wlsc_surface *) device->pointer_focus;
1314
1315         if (state)
1316                 wlsc_compositor_idle_inhibit(compositor);
1317         else
1318                 wlsc_compositor_idle_release(compositor);
1319
1320         if (state && surface && device->grab == NULL) {
1321                 wlsc_surface_activate(surface, wd, time);
1322                 wl_input_device_start_grab(device,
1323                                            &device->motion_grab,
1324                                            button, time);
1325         }
1326
1327         wl_list_for_each(b, &compositor->binding_list, link) {
1328                 if (b->button == button &&
1329                     b->modifier == wd->modifier_state && state) {
1330                         b->handler(&wd->input_device,
1331                                    time, 0, button, state, b->data);
1332                         break;
1333                 }
1334         }
1335
1336         if (device->grab)
1337                 device->grab->interface->button(device->grab, time,
1338                                                 button, state);
1339
1340         if (!state && device->grab && device->grab_button == button)
1341                 wl_input_device_end_grab(device, time);
1342 }
1343
1344 static void
1345 terminate_binding(struct wl_input_device *device, uint32_t time,
1346                   uint32_t key, uint32_t button, uint32_t state, void *data)
1347 {
1348         struct wlsc_compositor *compositor = data;
1349
1350         if (state)
1351                 wl_display_terminate(compositor->wl_display);
1352 }
1353
1354 WL_EXPORT struct wlsc_binding *
1355 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1356                             uint32_t key, uint32_t button, uint32_t modifier,
1357                             wlsc_binding_handler_t handler, void *data)
1358 {
1359         struct wlsc_binding *binding;
1360
1361         binding = malloc(sizeof *binding);
1362         if (binding == NULL)
1363                 return NULL;
1364
1365         binding->key = key;
1366         binding->button = button;
1367         binding->modifier = modifier;
1368         binding->handler = handler;
1369         binding->data = data;
1370         wl_list_insert(compositor->binding_list.prev, &binding->link);
1371
1372         return binding;
1373 }
1374
1375 WL_EXPORT void
1376 wlsc_binding_destroy(struct wlsc_binding *binding)
1377 {
1378         wl_list_remove(&binding->link);
1379         free(binding);
1380 }
1381
1382 static void
1383 update_modifier_state(struct wlsc_input_device *device,
1384                       uint32_t key, uint32_t state)
1385 {
1386         uint32_t modifier;
1387
1388         switch (key) {
1389         case KEY_LEFTCTRL:
1390         case KEY_RIGHTCTRL:
1391                 modifier = MODIFIER_CTRL;
1392                 break;
1393
1394         case KEY_LEFTALT:
1395         case KEY_RIGHTALT:
1396                 modifier = MODIFIER_ALT;
1397                 break;
1398
1399         case KEY_LEFTMETA:
1400         case KEY_RIGHTMETA:
1401                 modifier = MODIFIER_SUPER;
1402                 break;
1403
1404         default:
1405                 modifier = 0;
1406                 break;
1407         }
1408
1409         if (state)
1410                 device->modifier_state |= modifier;
1411         else
1412                 device->modifier_state &= ~modifier;
1413 }
1414
1415 WL_EXPORT void
1416 notify_key(struct wl_input_device *device,
1417            uint32_t time, uint32_t key, uint32_t state)
1418 {
1419         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1420         struct wlsc_compositor *compositor =
1421                 (struct wlsc_compositor *) device->compositor;
1422         uint32_t *k, *end;
1423         struct wlsc_binding *b;
1424
1425         if (state)
1426                 wlsc_compositor_idle_inhibit(compositor);
1427         else
1428                 wlsc_compositor_idle_release(compositor);
1429
1430         wl_list_for_each(b, &compositor->binding_list, link) {
1431                 if (b->key == key &&
1432                     b->modifier == wd->modifier_state) {
1433                         b->handler(&wd->input_device,
1434                                    time, key, 0, state, b->data);
1435                         break;
1436                 }
1437         }
1438
1439         update_modifier_state(wd, key, state);
1440         end = device->keys.data + device->keys.size;
1441         for (k = device->keys.data; k < end; k++) {
1442                 if (*k == key)
1443                         *k = *--end;
1444         }
1445         device->keys.size = (void *) end - device->keys.data;
1446         if (state) {
1447                 k = wl_array_add(&device->keys, sizeof *k);
1448                 *k = key;
1449         }
1450
1451         if (device->keyboard_focus != NULL)
1452                 wl_client_post_event(device->keyboard_focus->client,
1453                                      &device->object,
1454                                      WL_INPUT_DEVICE_KEY, time, key, state);
1455 }
1456
1457 WL_EXPORT void
1458 notify_pointer_focus(struct wl_input_device *device,
1459                      uint32_t time, struct wlsc_output *output,
1460                      int32_t x, int32_t y)
1461 {
1462         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1463         struct wlsc_compositor *compositor =
1464                 (struct wlsc_compositor *) device->compositor;
1465         struct wlsc_surface *es;
1466         int32_t sx, sy;
1467
1468         if (output) {
1469                 device->x = x;
1470                 device->y = y;
1471                 es = pick_surface(device, &sx, &sy);
1472                 wl_input_device_set_pointer_focus(device,
1473                                                   &es->surface,
1474                                                   time, x, y, sx, sy);
1475
1476                 compositor->focus = 1;
1477
1478                 wd->sprite->x = device->x - wd->hotspot_x;
1479                 wd->sprite->y = device->y - wd->hotspot_y;
1480         } else {
1481                 wl_input_device_set_pointer_focus(device, NULL,
1482                                                   time, 0, 0, 0, 0);
1483                 compositor->focus = 0;
1484         }
1485
1486         wlsc_surface_damage(wd->sprite);
1487 }
1488
1489 WL_EXPORT void
1490 notify_keyboard_focus(struct wl_input_device *device,
1491                       uint32_t time, struct wlsc_output *output,
1492                       struct wl_array *keys)
1493 {
1494         struct wlsc_input_device *wd =
1495                 (struct wlsc_input_device *) device;
1496         struct wlsc_compositor *compositor =
1497                 (struct wlsc_compositor *) device->compositor;
1498         struct wlsc_surface *es;
1499         uint32_t *k, *end;
1500
1501         if (!wl_list_empty(&compositor->surface_list))
1502                 es = container_of(compositor->surface_list.next,
1503                                   struct wlsc_surface, link);
1504         else
1505                 es = NULL;
1506
1507         if (output) {
1508                 wl_array_copy(&wd->input_device.keys, keys);
1509                 wd->modifier_state = 0;
1510                 end = device->keys.data + device->keys.size;
1511                 for (k = device->keys.data; k < end; k++) {
1512                         wlsc_compositor_idle_inhibit(compositor);
1513                         update_modifier_state(wd, *k, 1);
1514                 }
1515
1516                 if (es->surface.client)
1517                         wl_input_device_set_keyboard_focus(&wd->input_device,
1518                                                            &es->surface, time);
1519         } else {
1520                 end = device->keys.data + device->keys.size;
1521                 for (k = device->keys.data; k < end; k++)
1522                         wlsc_compositor_idle_release(compositor);
1523
1524                 wd->modifier_state = 0;
1525                 wl_input_device_set_keyboard_focus(&wd->input_device,
1526                                                    NULL, time);
1527         }
1528 }
1529
1530
1531 static void
1532 input_device_attach(struct wl_client *client,
1533                     struct wl_input_device *device_base,
1534                     uint32_t time,
1535                     struct wl_buffer *buffer, int32_t x, int32_t y)
1536 {
1537         struct wlsc_input_device *device =
1538                 (struct wlsc_input_device *) device_base;
1539
1540         if (time < device->input_device.pointer_focus_time)
1541                 return;
1542         if (device->input_device.pointer_focus == NULL)
1543                 return;
1544         if (device->input_device.pointer_focus->client != client)
1545                 return;
1546
1547         if (buffer == NULL) {
1548                 wlsc_input_device_set_pointer_image(device,
1549                                                     WLSC_POINTER_LEFT_PTR);
1550                 return;
1551         }
1552
1553         wlsc_input_device_attach_buffer(device, buffer, x, y);
1554 }
1555
1556 const static struct wl_input_device_interface input_device_interface = {
1557         input_device_attach,
1558 };
1559
1560 WL_EXPORT void
1561 wlsc_input_device_init(struct wlsc_input_device *device,
1562                        struct wlsc_compositor *ec)
1563 {
1564         wl_input_device_init(&device->input_device, &ec->compositor);
1565
1566         device->input_device.object.interface = &wl_input_device_interface;
1567         device->input_device.object.implementation =
1568                 (void (**)(void)) &input_device_interface;
1569         wl_display_add_object(ec->wl_display, &device->input_device.object);
1570         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1571
1572         device->sprite = wlsc_surface_create(ec,
1573                                              device->input_device.x,
1574                                              device->input_device.y, 32, 32);
1575         wl_list_insert(&ec->surface_list, &device->sprite->link);
1576
1577         device->hotspot_x = 16;
1578         device->hotspot_y = 16;
1579         device->modifier_state = 0;
1580
1581         device->input_device.motion_grab.interface = &motion_grab_interface;
1582
1583         wl_list_insert(ec->input_device_list.prev, &device->link);
1584
1585         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1586 }
1587
1588 static void
1589 wlsc_output_post_geometry(struct wl_client *client,
1590                           struct wl_object *global, uint32_t version)
1591 {
1592         struct wlsc_output *output =
1593                 container_of(global, struct wlsc_output, object);
1594         struct wlsc_mode *mode;
1595
1596         wl_client_post_event(client, global,
1597                              WL_OUTPUT_GEOMETRY,
1598                              output->x,
1599                              output->y,
1600                              output->mm_width,
1601                              output->mm_height,
1602                              output->subpixel,
1603                              output->make, output->model);
1604
1605         wl_list_for_each (mode, &output->mode_list, link) {
1606                 wl_client_post_event(client, global,
1607                                      WL_OUTPUT_MODE,
1608                                      mode->flags,
1609                                      mode->width, mode->height, mode->refresh);
1610         }
1611 }
1612
1613 static const char vertex_shader[] =
1614         "uniform mat4 proj;\n"
1615         "attribute vec2 position;\n"
1616         "attribute vec2 texcoord;\n"
1617         "varying vec2 v_texcoord;\n"
1618         "void main()\n"
1619         "{\n"
1620         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1621         "   v_texcoord = texcoord;\n"
1622         "}\n";
1623
1624 static const char texture_fragment_shader[] =
1625         "precision mediump float;\n"
1626         "varying vec2 v_texcoord;\n"
1627         "uniform sampler2D tex;\n"
1628         "void main()\n"
1629         "{\n"
1630         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1631         "}\n";
1632
1633 static const char solid_fragment_shader[] =
1634         "precision mediump float;\n"
1635         "uniform vec4 color;\n"
1636         "void main()\n"
1637         "{\n"
1638         "   gl_FragColor = color\n;"
1639         "}\n";
1640
1641 static int
1642 compile_shader(GLenum type, const char *source)
1643 {
1644         GLuint s;
1645         char msg[512];
1646         GLint status;
1647
1648         s = glCreateShader(type);
1649         glShaderSource(s, 1, &source, NULL);
1650         glCompileShader(s);
1651         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1652         if (!status) {
1653                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1654                 fprintf(stderr, "shader info: %s\n", msg);
1655                 return GL_NONE;
1656         }
1657
1658         return s;
1659 }
1660
1661 static int
1662 wlsc_shader_init(struct wlsc_shader *shader,
1663                  const char *vertex_source, const char *fragment_source)
1664 {
1665         char msg[512];
1666         GLint status;
1667
1668         shader->vertex_shader =
1669                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1670         shader->fragment_shader =
1671                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1672
1673         shader->program = glCreateProgram();
1674         glAttachShader(shader->program, shader->vertex_shader);
1675         glAttachShader(shader->program, shader->fragment_shader);
1676         glBindAttribLocation(shader->program, 0, "position");
1677         glBindAttribLocation(shader->program, 1, "texcoord");
1678
1679         glLinkProgram(shader->program);
1680         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1681         if (!status) {
1682                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1683                 fprintf(stderr, "link info: %s\n", msg);
1684                 return -1;
1685         }
1686
1687         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1688         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1689
1690         return 0;
1691 }
1692
1693 static int
1694 init_solid_shader(struct wlsc_shader *shader,
1695                   GLuint vertex_shader, const char *fragment_source)
1696 {
1697         GLint status;
1698         char msg[512];
1699
1700         shader->vertex_shader = vertex_shader;
1701         shader->fragment_shader =
1702                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1703
1704         shader->program = glCreateProgram();
1705         glAttachShader(shader->program, shader->vertex_shader);
1706         glAttachShader(shader->program, shader->fragment_shader);
1707         glBindAttribLocation(shader->program, 0, "position");
1708         glBindAttribLocation(shader->program, 1, "texcoord");
1709
1710         glLinkProgram(shader->program);
1711         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1712         if (!status) {
1713                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1714                 fprintf(stderr, "link info: %s\n", msg);
1715                 return -1;
1716         }
1717
1718         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1719         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1720
1721         return 0;
1722 }
1723
1724 WL_EXPORT void
1725 wlsc_output_destroy(struct wlsc_output *output)
1726 {
1727         pixman_region32_fini(&output->region);
1728         pixman_region32_fini(&output->previous_damage);
1729         destroy_surface(&output->background->surface.resource, NULL);
1730 }
1731
1732 WL_EXPORT void
1733 wlsc_output_move(struct wlsc_output *output, int x, int y)
1734 {
1735         struct wlsc_compositor *c = output->compositor;
1736         int flip;
1737
1738         output->x = x;
1739         output->y = y;
1740
1741         if (output->background) {
1742                 output->background->x = x;
1743                 output->background->y = y;
1744         }
1745
1746         pixman_region32_init(&output->previous_damage);
1747         pixman_region32_init_rect(&output->region, x, y,
1748                                   output->current->width,
1749                                   output->current->height);
1750
1751         wlsc_matrix_init(&output->matrix);
1752         wlsc_matrix_translate(&output->matrix,
1753                               -output->x - output->current->width / 2.0,
1754                               -output->y - output->current->height / 2.0, 0);
1755
1756         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1757         wlsc_matrix_scale(&output->matrix,
1758                           2.0 / output->current->width,
1759                           flip * 2.0 / output->current->height, 1);
1760
1761         pixman_region32_union(&c->damage, &c->damage, &output->region);
1762 }
1763
1764 WL_EXPORT void
1765 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1766                  int x, int y, int width, int height, uint32_t flags)
1767 {
1768         output->compositor = c;
1769         output->x = x;
1770         output->y = y;
1771         output->mm_width = width;
1772         output->mm_height = height;
1773
1774         output->background =
1775                 background_create(output, option_background);
1776
1777         if (output->background != NULL)
1778                 wl_list_insert(c->surface_list.prev,
1779                                &output->background->link);
1780
1781         output->flags = flags;
1782         wlsc_output_move(output, x, y);
1783
1784         output->scanout_buffer_destroy_listener.func =
1785                 output_handle_scanout_buffer_destroy;
1786         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1787
1788         output->object.interface = &wl_output_interface;
1789         wl_display_add_object(c->wl_display, &output->object);
1790         wl_display_add_global(c->wl_display, &output->object,
1791                               wlsc_output_post_geometry);
1792 }
1793
1794 static void
1795 shm_buffer_created(struct wl_buffer *buffer)
1796 {
1797         struct wl_list *surfaces_attached_to;
1798
1799         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1800         if (!surfaces_attached_to) {
1801                 buffer->user_data = NULL;
1802                 return;
1803         }
1804
1805         wl_list_init(surfaces_attached_to);
1806
1807         buffer->user_data = surfaces_attached_to;
1808 }
1809
1810 static void
1811 shm_buffer_damaged(struct wl_buffer *buffer,
1812                    int32_t x, int32_t y, int32_t width, int32_t height)
1813 {
1814         struct wl_list *surfaces_attached_to = buffer->user_data;
1815         struct wlsc_surface *es;
1816         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1817
1818         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1819                 glBindTexture(GL_TEXTURE_2D, es->texture);
1820                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1821                              tex_width, buffer->height, 0,
1822                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1823                              wl_shm_buffer_get_data(buffer));
1824                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1825                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1826         }
1827 }
1828
1829 static void
1830 shm_buffer_destroyed(struct wl_buffer *buffer)
1831 {
1832         struct wl_list *surfaces_attached_to = buffer->user_data;
1833         struct wlsc_surface *es, *next;
1834
1835         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1836                 wl_list_remove(&es->buffer_link);
1837                 wl_list_init(&es->buffer_link);
1838         }
1839
1840         free(surfaces_attached_to);
1841 }
1842
1843 const static struct wl_shm_callbacks shm_callbacks = {
1844         shm_buffer_created,
1845         shm_buffer_damaged,
1846         shm_buffer_destroyed
1847 };
1848
1849 WL_EXPORT int
1850 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1851 {
1852         struct wl_event_loop *loop;
1853         const char *extensions;
1854
1855         ec->wl_display = display;
1856
1857         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1858
1859         ec->shm = wl_shm_init(display, &shm_callbacks);
1860
1861         ec->image_target_texture_2d =
1862                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1863         ec->image_target_renderbuffer_storage = (void *)
1864                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1865         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1866         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1867         ec->bind_display =
1868                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1869         ec->unbind_display =
1870                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1871
1872         extensions = (const char *) glGetString(GL_EXTENSIONS);
1873         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1874                 fprintf(stderr,
1875                         "GL_EXT_texture_format_BGRA8888 not available\n");
1876                 return -1;
1877         }
1878
1879         extensions =
1880                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1881         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1882                 ec->has_bind_display = 1;
1883         if (ec->has_bind_display)
1884                 ec->bind_display(ec->display, ec->wl_display);
1885
1886         wl_list_init(&ec->surface_list);
1887         wl_list_init(&ec->input_device_list);
1888         wl_list_init(&ec->output_list);
1889         wl_list_init(&ec->binding_list);
1890         wl_list_init(&ec->animation_list);
1891         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1892         ec->fade.animation.frame = fade_frame;
1893         wl_list_init(&ec->fade.animation.link);
1894
1895         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1896                                     MODIFIER_CTRL | MODIFIER_ALT,
1897                                     terminate_binding, ec);
1898
1899         create_pointer_images(ec);
1900
1901         screenshooter_create(ec);
1902
1903         glActiveTexture(GL_TEXTURE0);
1904
1905         if (wlsc_shader_init(&ec->texture_shader,
1906                              vertex_shader, texture_fragment_shader) < 0)
1907                 return -1;
1908         if (init_solid_shader(&ec->solid_shader,
1909                               ec->texture_shader.vertex_shader,
1910                               solid_fragment_shader) < 0)
1911                 return -1;
1912
1913         loop = wl_display_get_event_loop(ec->wl_display);
1914         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1915         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1916
1917         pixman_region32_init(&ec->damage);
1918         wlsc_compositor_schedule_repaint(ec);
1919
1920         return 0;
1921 }
1922
1923 static int on_term_signal(int signal_number, void *data)
1924 {
1925         struct wlsc_compositor *ec = data;
1926
1927         wl_display_terminate(ec->wl_display);
1928
1929         return 1;
1930 }
1931
1932 static void *
1933 load_module(const char *name, const char *entrypoint, void **handle)
1934 {
1935         char path[PATH_MAX];
1936         void *module, *init;
1937
1938         if (name[0] != '/')
1939                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1940         else
1941                 snprintf(path, sizeof path, "%s", name);
1942
1943         module = dlopen(path, RTLD_LAZY);
1944         if (!module) {
1945                 fprintf(stderr,
1946                         "failed to load module: %s\n", dlerror());
1947                 return NULL;
1948         }
1949
1950         init = dlsym(module, entrypoint);
1951         if (!init) {
1952                 fprintf(stderr,
1953                         "failed to lookup init function: %s\n", dlerror());
1954                 return NULL;
1955         }
1956
1957         return init;
1958 }
1959
1960 int main(int argc, char *argv[])
1961 {
1962         struct wl_display *display;
1963         struct wlsc_compositor *ec;
1964         struct wl_event_loop *loop;
1965         int o, xserver = 0;
1966         void *shell_module, *backend_module;
1967         int (*shell_init)(struct wlsc_compositor *ec);
1968         struct wlsc_compositor
1969                 *(*backend_init)(struct wl_display *display, char *options);
1970         char *backend = NULL;
1971         char *backend_options = "";
1972         char *shell = NULL;
1973         char *p;
1974
1975         static const char opts[] = "B:b:o:S:i:s:x";
1976         static const struct option longopts[ ] = {
1977                 { "backend", 1, NULL, 'B' },
1978                 { "backend-options", 1, NULL, 'o' },
1979                 { "background", 1, NULL, 'b' },
1980                 { "socket", 1, NULL, 'S' },
1981                 { "idle-time", 1, NULL, 'i' },
1982                 { "shell", 1, NULL, 's' },
1983                 { "xserver", 0, NULL, 'x' },
1984                 { NULL, }
1985         };
1986
1987         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1988                 switch (o) {
1989                 case 'b':
1990                         option_background = optarg;
1991                         break;
1992                 case 'B':
1993                         backend = optarg;
1994                         break;
1995                 case 'o':
1996                         backend_options = optarg;
1997                         break;
1998                 case 'S':
1999                         option_socket_name = optarg;
2000                         break;
2001                 case 'i':
2002                         option_idle_time = strtol(optarg, &p, 0);
2003                         if (*p != '\0') {
2004                                 fprintf(stderr,
2005                                         "invalid idle time option: %s\n",
2006                                         optarg);
2007                                 exit(EXIT_FAILURE);
2008                         }
2009                         break;
2010                 case 's':
2011                         shell = optarg;
2012                         break;
2013                 case 'x':
2014                         xserver = 1;
2015                         break;
2016                 }
2017         }
2018
2019         display = wl_display_create();
2020
2021         ec = NULL;
2022
2023         if (!backend) {
2024                 if (getenv("WAYLAND_DISPLAY"))
2025                         backend = "wayland-backend.so";
2026                 else if (getenv("DISPLAY"))
2027                         backend = "x11-backend.so";
2028                 else if (getenv("OPENWFD"))
2029                         backend = "openwfd-backend.so";
2030                 else
2031                         backend = "drm-backend.so";
2032         }
2033
2034         if (!shell)
2035                 shell = "desktop-shell.so";
2036
2037         backend_init = load_module(backend, "backend_init", &backend_module);
2038         if (!backend_init)
2039                 exit(EXIT_FAILURE);
2040
2041         shell_init = load_module(shell, "shell_init", &shell_module);
2042         if (!shell_init)
2043                 exit(EXIT_FAILURE);
2044
2045         ec = backend_init(display, backend_options);
2046         if (ec == NULL) {
2047                 fprintf(stderr, "failed to create compositor\n");
2048                 exit(EXIT_FAILURE);
2049         }
2050
2051         if (shell_init(ec) < 0)
2052                 exit(EXIT_FAILURE);
2053
2054         if (xserver)
2055                 wlsc_xserver_init(display);
2056
2057         if (wl_display_add_socket(display, option_socket_name)) {
2058                 fprintf(stderr, "failed to add socket: %m\n");
2059                 exit(EXIT_FAILURE);
2060         }
2061
2062         loop = wl_display_get_event_loop(ec->wl_display);
2063         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2064         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2065
2066         wl_list_init(&child_process_list);
2067         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2068
2069         wl_display_run(display);
2070
2071         if (ec->has_bind_display)
2072                 ec->unbind_display(ec->display, display);
2073         wl_display_destroy(display);
2074
2075         ec->destroy(ec);
2076
2077         return 0;
2078 }