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_set_cursor(struct wlsc_output *output,
 777                        struct wl_input_device *dev, int force_sw)
 778 {
 779         struct wlsc_compositor *ec = output->compositor;
 780         struct wlsc_input_device *device = (struct wlsc_input_device *) dev;
 781         pixman_region32_t cursor_region;
 782         int use_hardware_cursor = 1, prior_was_hardware;
 783
 784         pixman_region32_init_rect(&cursor_region,
 785                                   device->sprite->x, device->sprite->y,
 786                                   device->sprite->width,
 787                                   device->sprite->height);
 788
 789         pixman_region32_intersect(&cursor_region, &cursor_region, &output->region);
 790
 791         if (!pixman_region32_not_empty(&cursor_region)) {
 792                 output->set_hardware_cursor(output, NULL);
 793                 goto out;
 794         }
 795
 796         prior_was_hardware = wl_list_empty(&device->sprite->link);
 797         if (force_sw || output->set_hardware_cursor(output, device) < 0) {
 798                 if (prior_was_hardware)
 799                         wlsc_surface_damage(device->sprite);
 800                 use_hardware_cursor = 0;
 801         } else if (!prior_was_hardware) {
 802                 wlsc_surface_damage_below(device->sprite);
 803         }
 804
 805         /* Remove always to be on top. */
 806         wl_list_remove(&device->sprite->link);
 807         if (!use_hardware_cursor)
 808                 wl_list_insert(&ec->surface_list, &device->sprite->link);
 809         else
 810                 wl_list_init(&device->sprite->link);
 811
 812 out:
 813         pixman_region32_fini(&cursor_region);
 814 }
 815
 816 static void
 817 wlsc_output_repaint(struct wlsc_output *output)
 818 {
 819         struct wlsc_compositor *ec = output->compositor;
 820         struct wlsc_surface *es;
 821         pixman_region32_t opaque, new_damage, total_damage, repaint;
 822
 823         output->prepare_render(output);
 824
 825         glViewport(0, 0, output->current->width, output->current->height);
 826
 827         glUseProgram(ec->texture_shader.program);
 828         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 829                            1, GL_FALSE, output->matrix.d);
 830         glUniform1i(ec->texture_shader.tex_uniform, 0);
 831
 832         wlsc_output_set_cursor(output, ec->input_device,
 833                                !(ec->focus && ec->fade.spring.current < 0.001));
 834
 835         pixman_region32_init(&new_damage);
 836         pixman_region32_copy(&new_damage, &ec->damage);
 837         pixman_region32_init(&opaque);
 838
 839         wl_list_for_each(es, &ec->surface_list, link) {
 840                 pixman_region32_subtract(&es->damage, &es->damage, &opaque);
 841                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 842                 pixman_region32_union(&opaque, &opaque, &es->opaque);
 843         }
 844
 845         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 846
 847         pixman_region32_init(&total_damage);
 848         pixman_region32_union(&total_damage, &new_damage,
 849                               &output->previous_damage);
 850         pixman_region32_intersect(&output->previous_damage,
 851                                   &new_damage, &output->region);
 852
 853         pixman_region32_fini(&opaque);
 854         pixman_region32_fini(&new_damage);
 855
 856         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 857
 858         if (es->visual == &ec->compositor.rgb_visual &&
 859             output->prepare_scanout_surface(output, es) == 0) {
 860                 /* We're drawing nothing now,
 861                  * draw the damaged regions later. */
 862                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 863
 864                 output->scanout_buffer = es->buffer;
 865                 output->scanout_buffer->busy_count++;
 866
 867                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 868                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 869                                &output->scanout_buffer_destroy_listener.link);
 870
 871                 return;
 872         }
 873
 874         if (es->fullscreen_output == output) {
 875                 if (es->width < output->current->width ||
 876                     es->height < output->current->height)
 877                         glClear(GL_COLOR_BUFFER_BIT);
 878                 wlsc_surface_draw(es, output, &total_damage);
 879         } else {
 880                 wl_list_for_each(es, &ec->surface_list, link) {
 881                         pixman_region32_copy(&es->damage, &total_damage);
 882                         pixman_region32_subtract(&total_damage, &total_damage, &es->opaque);
 883                 }
 884
 885                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 886                         pixman_region32_init(&repaint);
 887                         pixman_region32_intersect(&repaint, &output->region,
 888                                                   &es->damage);
 889                         wlsc_surface_draw(es, output, &repaint);
 890                         pixman_region32_subtract(&es->damage,
 891                                                  &es->damage, &output->region);
 892                 }
 893         }
 894
 895         if (ec->fade.spring.current > 0.001)
 896                 fade_output(output, ec->fade.spring.current, &total_damage);
 897 }
 898
 899 static void
 900 repaint(void *data, int msecs)
 901 {
 902         struct wlsc_output *output = data;
 903         struct wlsc_compositor *compositor = output->compositor;
 904         struct wlsc_surface *es;
 905         struct wlsc_animation *animation, *next;
 906
 907         wlsc_output_repaint(output);
 908         output->repaint_needed = 0;
 909         output->repaint_scheduled = 1;
 910         output->present(output);
 911
 912         /* FIXME: Keep the surfaces in an per-output list. */
 913         wl_list_for_each(es, &compositor->surface_list, link) {
 914                 if (es->output == output) {
 915                         wl_display_post_frame(compositor->wl_display,
 916                                               &es->surface, msecs);
 917                 }
 918         }
 919
 920         wl_list_for_each_safe(animation, next,
 921                               &compositor->animation_list, link)
 922                 animation->frame(animation, output, msecs);
 923 }
 924
 925 static void
 926 idle_repaint(void *data)
 927 {
 928         repaint(data, wlsc_compositor_get_time());
 929 }
 930
 931 WL_EXPORT void
 932 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 933 {
 934         wlsc_buffer_post_release(output->scanout_buffer);
 935         output->scanout_buffer = NULL;
 936         output->repaint_scheduled = 0;
 937
 938         if (output->repaint_needed)
 939                 repaint(output, msecs);
 940 }
 941
 942 WL_EXPORT void
 943 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 944 {
 945         struct wlsc_output *output;
 946         struct wl_event_loop *loop;
 947
 948         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 949                 return;
 950
 951         loop = wl_display_get_event_loop(compositor->wl_display);
 952         wl_list_for_each(output, &compositor->output_list, link) {
 953                 output->repaint_needed = 1;
 954                 if (output->repaint_scheduled)
 955                         continue;
 956
 957                 wl_event_loop_add_idle(loop, idle_repaint, output);
 958                 output->repaint_scheduled = 1;
 959         }
 960 }
 961
 962 WL_EXPORT void
 963 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 964 {
 965         int done;
 966
 967         done = wlsc_spring_done(&compositor->fade.spring);
 968         compositor->fade.spring.target = tint;
 969         if (wlsc_spring_done(&compositor->fade.spring))
 970                 return;
 971
 972         if (done)
 973                 compositor->fade.spring.timestamp =
 974                         wlsc_compositor_get_time();
 975
 976         wlsc_compositor_damage_all(compositor);
 977         if (wl_list_empty(&compositor->fade.animation.link))
 978                 wl_list_insert(compositor->animation_list.prev,
 979                                &compositor->fade.animation.link);
 980 }
 981
 982 static void
 983 surface_destroy(struct wl_client *client,
 984                 struct wl_surface *surface)
 985 {
 986         wl_resource_destroy(&surface->resource, client,
 987                             wlsc_compositor_get_time());
 988 }
 989
 990 WL_EXPORT void
 991 wlsc_surface_assign_output(struct wlsc_surface *es)
 992 {
 993         struct wlsc_compositor *ec = es->compositor;
 994         struct wlsc_output *output;
 995         pixman_region32_t region;
 996         uint32_t max, area;
 997         pixman_box32_t *e;
 998
 999         max = 0;
1000         wl_list_for_each(output, &ec->output_list, link) {
1001                 pixman_region32_init_rect(&region,
1002                                           es->x, es->y, es->width, es->height);
1003                 pixman_region32_intersect(&region, &region, &output->region);
1004
1005                 e = pixman_region32_extents(&region);
1006                 area = (e->x2 - e->x1) * (e->y2 - e->y1);
1007
1008                 if (area >= max) {
1009                         es->output = output;
1010                         max = area;
1011                 }
1012         }
1013 }
1014
1015 static void
1016 surface_attach(struct wl_client *client,
1017                struct wl_surface *surface, struct wl_buffer *buffer,
1018                int32_t x, int32_t y)
1019 {
1020         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1021
1022         buffer->busy_count++;
1023         wlsc_buffer_post_release(es->buffer);
1024
1025         es->buffer = buffer;
1026         wl_list_remove(&es->buffer_destroy_listener.link);
1027         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
1028                        &es->buffer_destroy_listener.link);
1029
1030         if (es->visual == NULL)
1031                 wl_list_insert(&es->compositor->surface_list, &es->link);
1032
1033         es->visual = buffer->visual;
1034         if (x != 0 || y != 0 ||
1035             es->width != buffer->width || es->height != buffer->height)
1036                 wlsc_surface_configure(es, es->x + x, es->y + y,
1037                                        buffer->width, buffer->height);
1038
1039         wlsc_buffer_attach(buffer, surface);
1040
1041         es->compositor->shell->attach(es->compositor->shell, es);
1042 }
1043
1044 static void
1045 surface_damage(struct wl_client *client,
1046                struct wl_surface *surface,
1047                int32_t x, int32_t y, int32_t width, int32_t height)
1048 {
1049         struct wlsc_surface *es = (struct wlsc_surface *) surface;
1050
1051         wlsc_surface_damage_rectangle(es, x, y, width, height);
1052 }
1053
1054 const static struct wl_surface_interface surface_interface = {
1055         surface_destroy,
1056         surface_attach,
1057         surface_damage
1058 };
1059
1060 static void
1061 wlsc_input_device_attach(struct wlsc_input_device *device,
1062                          int x, int y, int width, int height)
1063 {
1064         wlsc_surface_damage_below(device->sprite);
1065
1066         device->hotspot_x = x;
1067         device->hotspot_y = y;
1068
1069         device->sprite->x = device->input_device.x - device->hotspot_x;
1070         device->sprite->y = device->input_device.y - device->hotspot_y;
1071         device->sprite->width = width;
1072         device->sprite->height = height;
1073
1074         wlsc_surface_damage(device->sprite);
1075 }
1076
1077 static void
1078 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1079                                 struct wl_buffer *buffer, int x, int y)
1080 {
1081         wlsc_buffer_attach(buffer, &device->sprite->surface);
1082         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1083 }
1084
1085 static void
1086 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1087                                 struct wlsc_sprite *sprite, int x, int y)
1088 {
1089         wlsc_sprite_attach(sprite, &device->sprite->surface);
1090         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1091 }
1092
1093 WL_EXPORT void
1094 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1095                                     enum wlsc_pointer_type type)
1096 {
1097         struct wlsc_compositor *compositor =
1098                 (struct wlsc_compositor *) device->input_device.compositor;
1099
1100         wlsc_input_device_attach_sprite(device,
1101                                         compositor->pointer_sprites[type],
1102                                         pointer_images[type].hotspot_x,
1103                                         pointer_images[type].hotspot_y);
1104 }
1105
1106 static void
1107 compositor_create_surface(struct wl_client *client,
1108                           struct wl_compositor *compositor, uint32_t id)
1109 {
1110         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1111         struct wlsc_surface *surface;
1112
1113         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1114         if (surface == NULL) {
1115                 wl_client_post_no_memory(client);
1116                 return;
1117         }
1118
1119         surface->surface.resource.destroy = destroy_surface;
1120
1121         surface->surface.resource.object.id = id;
1122         surface->surface.resource.object.interface = &wl_surface_interface;
1123         surface->surface.resource.object.implementation =
1124                 (void (**)(void)) &surface_interface;
1125         surface->surface.client = client;
1126
1127         wl_client_add_resource(client, &surface->surface.resource);
1128 }
1129
1130 const static struct wl_compositor_interface compositor_interface = {
1131         compositor_create_surface,
1132 };
1133
1134 static void
1135 wlsc_surface_transform(struct wlsc_surface *surface,
1136                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1137 {
1138         *sx = x - surface->x;
1139         *sy = y - surface->y;
1140 }
1141
1142 WL_EXPORT struct wlsc_surface *
1143 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1144 {
1145         struct wlsc_compositor *ec =
1146                 (struct wlsc_compositor *) device->compositor;
1147         struct wlsc_surface *es;
1148
1149         wl_list_for_each(es, &ec->surface_list, link) {
1150                 if (es->surface.client == NULL)
1151                         continue;
1152                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1153                 if (0 <= *sx && *sx < es->width &&
1154                     0 <= *sy && *sy < es->height)
1155                         return es;
1156         }
1157
1158         return NULL;
1159 }
1160
1161
1162 static void
1163 motion_grab_motion(struct wl_grab *grab,
1164                    uint32_t time, int32_t x, int32_t y)
1165 {
1166         struct wlsc_input_device *device =
1167                 (struct wlsc_input_device *) grab->input_device;
1168         struct wlsc_surface *es =
1169                 (struct wlsc_surface *) device->input_device.pointer_focus;
1170         int32_t sx, sy;
1171
1172         wlsc_surface_transform(es, x, y, &sx, &sy);
1173         wl_client_post_event(es->surface.client,
1174                              &device->input_device.object,
1175                              WL_INPUT_DEVICE_MOTION,
1176                              time, x, y, sx, sy);
1177 }
1178
1179 static void
1180 motion_grab_button(struct wl_grab *grab,
1181                    uint32_t time, int32_t button, int32_t state)
1182 {
1183         wl_client_post_event(grab->input_device->pointer_focus->client,
1184                              &grab->input_device->object,
1185                              WL_INPUT_DEVICE_BUTTON,
1186                              time, button, state);
1187 }
1188
1189 static void
1190 motion_grab_end(struct wl_grab *grab, uint32_t time)
1191 {
1192 }
1193
1194 static const struct wl_grab_interface motion_grab_interface = {
1195         motion_grab_motion,
1196         motion_grab_button,
1197         motion_grab_end
1198 };
1199
1200 WL_EXPORT void
1201 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1202 {
1203         if (compositor->idle_inhibit)
1204                 return;
1205
1206         wlsc_compositor_fade(compositor, 0.0);
1207         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1208
1209         wl_event_source_timer_update(compositor->idle_source,
1210                                      option_idle_time * 1000);
1211 }
1212
1213 static void
1214 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1215 {
1216         wlsc_compositor_wake(compositor);
1217         compositor->idle_inhibit++;
1218 }
1219
1220 static void
1221 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1222 {
1223         compositor->idle_inhibit--;
1224         wlsc_compositor_wake(compositor);
1225 }
1226
1227 static int
1228 idle_handler(void *data)
1229 {
1230         struct wlsc_compositor *compositor = data;
1231
1232         if (compositor->idle_inhibit)
1233                 return 1;
1234
1235         wlsc_compositor_fade(compositor, 1.0);
1236
1237         return 1;
1238 }
1239
1240 WL_EXPORT void
1241 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1242 {
1243         struct wlsc_surface *es;
1244         struct wlsc_compositor *ec =
1245                 (struct wlsc_compositor *) device->compositor;
1246         struct wlsc_output *output;
1247         const struct wl_grab_interface *interface;
1248         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1249         int32_t sx, sy;
1250         int x_valid = 0, y_valid = 0;
1251         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1252
1253         wlsc_compositor_wake(ec);
1254
1255         wl_list_for_each(output, &ec->output_list, link) {
1256                 if (output->x <= x && x <= output->x + output->current->width)
1257                         x_valid = 1;
1258
1259                 if (output->y <= y && y <= output->y + output->current->height)
1260                         y_valid = 1;
1261
1262                 /* FIXME: calculate this only on output addition/deletion */
1263                 if (output->x < min_x)
1264                         min_x = output->x;
1265                 if (output->y < min_y)
1266                         min_y = output->y;
1267
1268                 if (output->x + output->current->width > max_x)
1269                         max_x = output->x + output->current->width;
1270                 if (output->y + output->current->height > max_y)
1271                         max_y = output->y + output->current->height;
1272         }
1273
1274         if (!x_valid) {
1275                 if (x < min_x)
1276                         x = min_x;
1277                 else if (x >= max_x)
1278                         x = max_x;
1279         }
1280         if (!y_valid) {
1281                 if (y < min_y)
1282                         y = min_y;
1283                 else  if (y >= max_y)
1284                         y = max_y;
1285         }
1286
1287         device->x = x;
1288         device->y = y;
1289
1290         if (device->grab) {
1291                 interface = device->grab->interface;
1292                 interface->motion(device->grab, time, x, y);
1293         } else {
1294                 es = pick_surface(device, &sx, &sy);
1295                 wl_input_device_set_pointer_focus(device,
1296                                                   &es->surface,
1297                                                   time, x, y, sx, sy);
1298                 if (es)
1299                         wl_client_post_event(es->surface.client,
1300                                              &device->object,
1301                                              WL_INPUT_DEVICE_MOTION,
1302                                              time, x, y, sx, sy);
1303         }
1304
1305         wlsc_surface_damage_below(wd->sprite);
1306
1307         wd->sprite->x = device->x - wd->hotspot_x;
1308         wd->sprite->y = device->y - wd->hotspot_y;
1309
1310         wlsc_surface_damage(wd->sprite);
1311 }
1312
1313 WL_EXPORT void
1314 wlsc_surface_activate(struct wlsc_surface *surface,
1315                       struct wlsc_input_device *device, uint32_t time)
1316 {
1317         struct wlsc_shell *shell = surface->compositor->shell;
1318
1319         wlsc_surface_raise(surface);
1320         if (device->selection)
1321                 shell->set_selection_focus(shell,
1322                                            device->selection,
1323                                            &surface->surface, time);
1324
1325         wl_input_device_set_keyboard_focus(&device->input_device,
1326                                            &surface->surface,
1327                                            time);
1328 }
1329
1330 struct wlsc_binding {
1331         uint32_t key;
1332         uint32_t button;
1333         uint32_t modifier;
1334         wlsc_binding_handler_t handler;
1335         void *data;
1336         struct wl_list link;
1337 };
1338
1339 WL_EXPORT void
1340 notify_button(struct wl_input_device *device,
1341               uint32_t time, int32_t button, int32_t state)
1342 {
1343         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1344         struct wlsc_compositor *compositor =
1345                 (struct wlsc_compositor *) device->compositor;
1346         struct wlsc_binding *b;
1347         struct wlsc_surface *surface =
1348                 (struct wlsc_surface *) device->pointer_focus;
1349
1350         if (state)
1351                 wlsc_compositor_idle_inhibit(compositor);
1352         else
1353                 wlsc_compositor_idle_release(compositor);
1354
1355         if (state && surface && device->grab == NULL) {
1356                 wlsc_surface_activate(surface, wd, time);
1357                 wl_input_device_start_grab(device,
1358                                            &device->motion_grab,
1359                                            button, time);
1360         }
1361
1362         wl_list_for_each(b, &compositor->binding_list, link) {
1363                 if (b->button == button &&
1364                     b->modifier == wd->modifier_state && state) {
1365                         b->handler(&wd->input_device,
1366                                    time, 0, button, state, b->data);
1367                         break;
1368                 }
1369         }
1370
1371         if (device->grab)
1372                 device->grab->interface->button(device->grab, time,
1373                                                 button, state);
1374
1375         if (!state && device->grab && device->grab_button == button)
1376                 wl_input_device_end_grab(device, time);
1377 }
1378
1379 static void
1380 terminate_binding(struct wl_input_device *device, uint32_t time,
1381                   uint32_t key, uint32_t button, uint32_t state, void *data)
1382 {
1383         struct wlsc_compositor *compositor = data;
1384
1385         if (state)
1386                 wl_display_terminate(compositor->wl_display);
1387 }
1388
1389 WL_EXPORT struct wlsc_binding *
1390 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1391                             uint32_t key, uint32_t button, uint32_t modifier,
1392                             wlsc_binding_handler_t handler, void *data)
1393 {
1394         struct wlsc_binding *binding;
1395
1396         binding = malloc(sizeof *binding);
1397         if (binding == NULL)
1398                 return NULL;
1399
1400         binding->key = key;
1401         binding->button = button;
1402         binding->modifier = modifier;
1403         binding->handler = handler;
1404         binding->data = data;
1405         wl_list_insert(compositor->binding_list.prev, &binding->link);
1406
1407         return binding;
1408 }
1409
1410 WL_EXPORT void
1411 wlsc_binding_destroy(struct wlsc_binding *binding)
1412 {
1413         wl_list_remove(&binding->link);
1414         free(binding);
1415 }
1416
1417 static void
1418 update_modifier_state(struct wlsc_input_device *device,
1419                       uint32_t key, uint32_t state)
1420 {
1421         uint32_t modifier;
1422
1423         switch (key) {
1424         case KEY_LEFTCTRL:
1425         case KEY_RIGHTCTRL:
1426                 modifier = MODIFIER_CTRL;
1427                 break;
1428
1429         case KEY_LEFTALT:
1430         case KEY_RIGHTALT:
1431                 modifier = MODIFIER_ALT;
1432                 break;
1433
1434         case KEY_LEFTMETA:
1435         case KEY_RIGHTMETA:
1436                 modifier = MODIFIER_SUPER;
1437                 break;
1438
1439         default:
1440                 modifier = 0;
1441                 break;
1442         }
1443
1444         if (state)
1445                 device->modifier_state |= modifier;
1446         else
1447                 device->modifier_state &= ~modifier;
1448 }
1449
1450 WL_EXPORT void
1451 notify_key(struct wl_input_device *device,
1452            uint32_t time, uint32_t key, uint32_t state)
1453 {
1454         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1455         struct wlsc_compositor *compositor =
1456                 (struct wlsc_compositor *) device->compositor;
1457         uint32_t *k, *end;
1458         struct wlsc_binding *b;
1459
1460         if (state)
1461                 wlsc_compositor_idle_inhibit(compositor);
1462         else
1463                 wlsc_compositor_idle_release(compositor);
1464
1465         wl_list_for_each(b, &compositor->binding_list, link) {
1466                 if (b->key == key &&
1467                     b->modifier == wd->modifier_state) {
1468                         b->handler(&wd->input_device,
1469                                    time, key, 0, state, b->data);
1470                         break;
1471                 }
1472         }
1473
1474         update_modifier_state(wd, key, state);
1475         end = device->keys.data + device->keys.size;
1476         for (k = device->keys.data; k < end; k++) {
1477                 if (*k == key)
1478                         *k = *--end;
1479         }
1480         device->keys.size = (void *) end - device->keys.data;
1481         if (state) {
1482                 k = wl_array_add(&device->keys, sizeof *k);
1483                 *k = key;
1484         }
1485
1486         if (device->keyboard_focus != NULL)
1487                 wl_client_post_event(device->keyboard_focus->client,
1488                                      &device->object,
1489                                      WL_INPUT_DEVICE_KEY, time, key, state);
1490 }
1491
1492 WL_EXPORT void
1493 notify_pointer_focus(struct wl_input_device *device,
1494                      uint32_t time, struct wlsc_output *output,
1495                      int32_t x, int32_t y)
1496 {
1497         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1498         struct wlsc_compositor *compositor =
1499                 (struct wlsc_compositor *) device->compositor;
1500         struct wlsc_surface *es;
1501         int32_t sx, sy;
1502
1503         if (output) {
1504                 device->x = x;
1505                 device->y = y;
1506                 es = pick_surface(device, &sx, &sy);
1507                 wl_input_device_set_pointer_focus(device,
1508                                                   &es->surface,
1509                                                   time, x, y, sx, sy);
1510
1511                 compositor->focus = 1;
1512
1513                 wd->sprite->x = device->x - wd->hotspot_x;
1514                 wd->sprite->y = device->y - wd->hotspot_y;
1515         } else {
1516                 wl_input_device_set_pointer_focus(device, NULL,
1517                                                   time, 0, 0, 0, 0);
1518                 compositor->focus = 0;
1519         }
1520
1521         wlsc_surface_damage(wd->sprite);
1522 }
1523
1524 WL_EXPORT void
1525 notify_keyboard_focus(struct wl_input_device *device,
1526                       uint32_t time, struct wlsc_output *output,
1527                       struct wl_array *keys)
1528 {
1529         struct wlsc_input_device *wd =
1530                 (struct wlsc_input_device *) device;
1531         struct wlsc_compositor *compositor =
1532                 (struct wlsc_compositor *) device->compositor;
1533         struct wlsc_surface *es;
1534         uint32_t *k, *end;
1535
1536         if (!wl_list_empty(&compositor->surface_list))
1537                 es = container_of(compositor->surface_list.next,
1538                                   struct wlsc_surface, link);
1539         else
1540                 es = NULL;
1541
1542         if (output) {
1543                 wl_array_copy(&wd->input_device.keys, keys);
1544                 wd->modifier_state = 0;
1545                 end = device->keys.data + device->keys.size;
1546                 for (k = device->keys.data; k < end; k++) {
1547                         wlsc_compositor_idle_inhibit(compositor);
1548                         update_modifier_state(wd, *k, 1);
1549                 }
1550
1551                 if (es->surface.client)
1552                         wl_input_device_set_keyboard_focus(&wd->input_device,
1553                                                            &es->surface, time);
1554         } else {
1555                 end = device->keys.data + device->keys.size;
1556                 for (k = device->keys.data; k < end; k++)
1557                         wlsc_compositor_idle_release(compositor);
1558
1559                 wd->modifier_state = 0;
1560                 wl_input_device_set_keyboard_focus(&wd->input_device,
1561                                                    NULL, time);
1562         }
1563 }
1564
1565
1566 static void
1567 input_device_attach(struct wl_client *client,
1568                     struct wl_input_device *device_base,
1569                     uint32_t time,
1570                     struct wl_buffer *buffer, int32_t x, int32_t y)
1571 {
1572         struct wlsc_input_device *device =
1573                 (struct wlsc_input_device *) device_base;
1574
1575         if (time < device->input_device.pointer_focus_time)
1576                 return;
1577         if (device->input_device.pointer_focus == NULL)
1578                 return;
1579         if (device->input_device.pointer_focus->client != client)
1580                 return;
1581
1582         if (buffer == NULL) {
1583                 wlsc_input_device_set_pointer_image(device,
1584                                                     WLSC_POINTER_LEFT_PTR);
1585                 return;
1586         }
1587
1588         wlsc_input_device_attach_buffer(device, buffer, x, y);
1589 }
1590
1591 const static struct wl_input_device_interface input_device_interface = {
1592         input_device_attach,
1593 };
1594
1595 WL_EXPORT void
1596 wlsc_input_device_init(struct wlsc_input_device *device,
1597                        struct wlsc_compositor *ec)
1598 {
1599         wl_input_device_init(&device->input_device, &ec->compositor);
1600
1601         device->input_device.object.interface = &wl_input_device_interface;
1602         device->input_device.object.implementation =
1603                 (void (**)(void)) &input_device_interface;
1604         wl_display_add_object(ec->wl_display, &device->input_device.object);
1605         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1606
1607         device->sprite = wlsc_surface_create(ec,
1608                                              device->input_device.x,
1609                                              device->input_device.y, 32, 32);
1610         wl_list_insert(&ec->surface_list, &device->sprite->link);
1611
1612         device->hotspot_x = 16;
1613         device->hotspot_y = 16;
1614         device->modifier_state = 0;
1615
1616         device->input_device.motion_grab.interface = &motion_grab_interface;
1617
1618         wl_list_insert(ec->input_device_list.prev, &device->link);
1619
1620         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1621 }
1622
1623 static void
1624 wlsc_output_post_geometry(struct wl_client *client,
1625                           struct wl_object *global, uint32_t version)
1626 {
1627         struct wlsc_output *output =
1628                 container_of(global, struct wlsc_output, object);
1629         struct wlsc_mode *mode;
1630
1631         wl_client_post_event(client, global,
1632                              WL_OUTPUT_GEOMETRY,
1633                              output->x,
1634                              output->y,
1635                              output->mm_width,
1636                              output->mm_height,
1637                              output->subpixel,
1638                              output->make, output->model);
1639
1640         wl_list_for_each (mode, &output->mode_list, link) {
1641                 wl_client_post_event(client, global,
1642                                      WL_OUTPUT_MODE,
1643                                      mode->flags,
1644                                      mode->width, mode->height, mode->refresh);
1645         }
1646 }
1647
1648 static const char vertex_shader[] =
1649         "uniform mat4 proj;\n"
1650         "attribute vec2 position;\n"
1651         "attribute vec2 texcoord;\n"
1652         "varying vec2 v_texcoord;\n"
1653         "void main()\n"
1654         "{\n"
1655         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1656         "   v_texcoord = texcoord;\n"
1657         "}\n";
1658
1659 static const char texture_fragment_shader[] =
1660         "precision mediump float;\n"
1661         "varying vec2 v_texcoord;\n"
1662         "uniform sampler2D tex;\n"
1663         "void main()\n"
1664         "{\n"
1665         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1666         "}\n";
1667
1668 static const char solid_fragment_shader[] =
1669         "precision mediump float;\n"
1670         "uniform vec4 color;\n"
1671         "void main()\n"
1672         "{\n"
1673         "   gl_FragColor = color\n;"
1674         "}\n";
1675
1676 static int
1677 compile_shader(GLenum type, const char *source)
1678 {
1679         GLuint s;
1680         char msg[512];
1681         GLint status;
1682
1683         s = glCreateShader(type);
1684         glShaderSource(s, 1, &source, NULL);
1685         glCompileShader(s);
1686         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1687         if (!status) {
1688                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1689                 fprintf(stderr, "shader info: %s\n", msg);
1690                 return GL_NONE;
1691         }
1692
1693         return s;
1694 }
1695
1696 static int
1697 wlsc_shader_init(struct wlsc_shader *shader,
1698                  const char *vertex_source, const char *fragment_source)
1699 {
1700         char msg[512];
1701         GLint status;
1702
1703         shader->vertex_shader =
1704                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1705         shader->fragment_shader =
1706                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1707
1708         shader->program = glCreateProgram();
1709         glAttachShader(shader->program, shader->vertex_shader);
1710         glAttachShader(shader->program, shader->fragment_shader);
1711         glBindAttribLocation(shader->program, 0, "position");
1712         glBindAttribLocation(shader->program, 1, "texcoord");
1713
1714         glLinkProgram(shader->program);
1715         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1716         if (!status) {
1717                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1718                 fprintf(stderr, "link info: %s\n", msg);
1719                 return -1;
1720         }
1721
1722         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1723         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1724
1725         return 0;
1726 }
1727
1728 static int
1729 init_solid_shader(struct wlsc_shader *shader,
1730                   GLuint vertex_shader, const char *fragment_source)
1731 {
1732         GLint status;
1733         char msg[512];
1734
1735         shader->vertex_shader = vertex_shader;
1736         shader->fragment_shader =
1737                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1738
1739         shader->program = glCreateProgram();
1740         glAttachShader(shader->program, shader->vertex_shader);
1741         glAttachShader(shader->program, shader->fragment_shader);
1742         glBindAttribLocation(shader->program, 0, "position");
1743         glBindAttribLocation(shader->program, 1, "texcoord");
1744
1745         glLinkProgram(shader->program);
1746         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1747         if (!status) {
1748                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1749                 fprintf(stderr, "link info: %s\n", msg);
1750                 return -1;
1751         }
1752
1753         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1754         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1755
1756         return 0;
1757 }
1758
1759 WL_EXPORT void
1760 wlsc_output_destroy(struct wlsc_output *output)
1761 {
1762         pixman_region32_fini(&output->region);
1763         pixman_region32_fini(&output->previous_damage);
1764         destroy_surface(&output->background->surface.resource, NULL);
1765 }
1766
1767 WL_EXPORT void
1768 wlsc_output_move(struct wlsc_output *output, int x, int y)
1769 {
1770         struct wlsc_compositor *c = output->compositor;
1771         int flip;
1772
1773         output->x = x;
1774         output->y = y;
1775
1776         if (output->background) {
1777                 output->background->x = x;
1778                 output->background->y = y;
1779         }
1780
1781         pixman_region32_init(&output->previous_damage);
1782         pixman_region32_init_rect(&output->region, x, y,
1783                                   output->current->width,
1784                                   output->current->height);
1785
1786         wlsc_matrix_init(&output->matrix);
1787         wlsc_matrix_translate(&output->matrix,
1788                               -output->x - output->current->width / 2.0,
1789                               -output->y - output->current->height / 2.0, 0);
1790
1791         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1792         wlsc_matrix_scale(&output->matrix,
1793                           2.0 / output->current->width,
1794                           flip * 2.0 / output->current->height, 1);
1795
1796         pixman_region32_union(&c->damage, &c->damage, &output->region);
1797 }
1798
1799 WL_EXPORT void
1800 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1801                  int x, int y, int width, int height, uint32_t flags)
1802 {
1803         output->compositor = c;
1804         output->x = x;
1805         output->y = y;
1806         output->mm_width = width;
1807         output->mm_height = height;
1808
1809         output->background =
1810                 background_create(output, option_background);
1811
1812         if (output->background != NULL)
1813                 wl_list_insert(c->surface_list.prev,
1814                                &output->background->link);
1815
1816         output->flags = flags;
1817         wlsc_output_move(output, x, y);
1818
1819         output->scanout_buffer_destroy_listener.func =
1820                 output_handle_scanout_buffer_destroy;
1821         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1822
1823         output->object.interface = &wl_output_interface;
1824         wl_display_add_object(c->wl_display, &output->object);
1825         wl_display_add_global(c->wl_display, &output->object,
1826                               wlsc_output_post_geometry);
1827 }
1828
1829 static void
1830 shm_buffer_created(struct wl_buffer *buffer)
1831 {
1832         struct wl_list *surfaces_attached_to;
1833
1834         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1835         if (!surfaces_attached_to) {
1836                 buffer->user_data = NULL;
1837                 return;
1838         }
1839
1840         wl_list_init(surfaces_attached_to);
1841
1842         buffer->user_data = surfaces_attached_to;
1843 }
1844
1845 static void
1846 shm_buffer_damaged(struct wl_buffer *buffer,
1847                    int32_t x, int32_t y, int32_t width, int32_t height)
1848 {
1849         struct wl_list *surfaces_attached_to = buffer->user_data;
1850         struct wlsc_surface *es;
1851         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1852
1853         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1854                 glBindTexture(GL_TEXTURE_2D, es->texture);
1855                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1856                              tex_width, buffer->height, 0,
1857                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1858                              wl_shm_buffer_get_data(buffer));
1859                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1860                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1861         }
1862 }
1863
1864 static void
1865 shm_buffer_destroyed(struct wl_buffer *buffer)
1866 {
1867         struct wl_list *surfaces_attached_to = buffer->user_data;
1868         struct wlsc_surface *es, *next;
1869
1870         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1871                 wl_list_remove(&es->buffer_link);
1872                 wl_list_init(&es->buffer_link);
1873         }
1874
1875         free(surfaces_attached_to);
1876 }
1877
1878 const static struct wl_shm_callbacks shm_callbacks = {
1879         shm_buffer_created,
1880         shm_buffer_damaged,
1881         shm_buffer_destroyed
1882 };
1883
1884 WL_EXPORT int
1885 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1886 {
1887         struct wl_event_loop *loop;
1888         const char *extensions;
1889
1890         ec->wl_display = display;
1891
1892         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1893
1894         ec->shm = wl_shm_init(display, &shm_callbacks);
1895
1896         ec->image_target_texture_2d =
1897                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1898         ec->image_target_renderbuffer_storage = (void *)
1899                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1900         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1901         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1902         ec->bind_display =
1903                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1904         ec->unbind_display =
1905                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1906
1907         extensions = (const char *) glGetString(GL_EXTENSIONS);
1908         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1909                 fprintf(stderr,
1910                         "GL_EXT_texture_format_BGRA8888 not available\n");
1911                 return -1;
1912         }
1913
1914         extensions =
1915                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1916         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1917                 ec->has_bind_display = 1;
1918         if (ec->has_bind_display)
1919                 ec->bind_display(ec->display, ec->wl_display);
1920
1921         wl_list_init(&ec->surface_list);
1922         wl_list_init(&ec->input_device_list);
1923         wl_list_init(&ec->output_list);
1924         wl_list_init(&ec->binding_list);
1925         wl_list_init(&ec->animation_list);
1926         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1927         ec->fade.animation.frame = fade_frame;
1928         wl_list_init(&ec->fade.animation.link);
1929
1930         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1931                                     MODIFIER_CTRL | MODIFIER_ALT,
1932                                     terminate_binding, ec);
1933
1934         create_pointer_images(ec);
1935
1936         screenshooter_create(ec);
1937
1938         glActiveTexture(GL_TEXTURE0);
1939
1940         if (wlsc_shader_init(&ec->texture_shader,
1941                              vertex_shader, texture_fragment_shader) < 0)
1942                 return -1;
1943         if (init_solid_shader(&ec->solid_shader,
1944                               ec->texture_shader.vertex_shader,
1945                               solid_fragment_shader) < 0)
1946                 return -1;
1947
1948         loop = wl_display_get_event_loop(ec->wl_display);
1949         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1950         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1951
1952         pixman_region32_init(&ec->damage);
1953         wlsc_compositor_schedule_repaint(ec);
1954
1955         return 0;
1956 }
1957
1958 static int on_term_signal(int signal_number, void *data)
1959 {
1960         struct wlsc_compositor *ec = data;
1961
1962         fprintf(stderr, "caught signal %d\n", signal_number);
1963         wl_display_terminate(ec->wl_display);
1964
1965         return 1;
1966 }
1967
1968 static void *
1969 load_module(const char *name, const char *entrypoint, void **handle)
1970 {
1971         char path[PATH_MAX];
1972         void *module, *init;
1973
1974         if (name[0] != '/')
1975                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1976         else
1977                 snprintf(path, sizeof path, "%s", name);
1978
1979         module = dlopen(path, RTLD_LAZY);
1980         if (!module) {
1981                 fprintf(stderr,
1982                         "failed to load module: %s\n", dlerror());
1983                 return NULL;
1984         }
1985
1986         init = dlsym(module, entrypoint);
1987         if (!init) {
1988                 fprintf(stderr,
1989                         "failed to lookup init function: %s\n", dlerror());
1990                 return NULL;
1991         }
1992
1993         return init;
1994 }
1995
1996 int main(int argc, char *argv[])
1997 {
1998         struct wl_display *display;
1999         struct wlsc_compositor *ec;
2000         struct wl_event_loop *loop;
2001         int o, xserver = 0;
2002         void *shell_module, *backend_module;
2003         int (*shell_init)(struct wlsc_compositor *ec);
2004         struct wlsc_compositor
2005                 *(*backend_init)(struct wl_display *display, char *options);
2006         char *backend = NULL;
2007         char *backend_options = "";
2008         char *shell = NULL;
2009         char *p;
2010
2011         static const char opts[] = "B:b:o:S:i:s:x";
2012         static const struct option longopts[ ] = {
2013                 { "backend", 1, NULL, 'B' },
2014                 { "backend-options", 1, NULL, 'o' },
2015                 { "background", 1, NULL, 'b' },
2016                 { "socket", 1, NULL, 'S' },
2017                 { "idle-time", 1, NULL, 'i' },
2018                 { "shell", 1, NULL, 's' },
2019                 { "xserver", 0, NULL, 'x' },
2020                 { NULL, }
2021         };
2022
2023         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
2024                 switch (o) {
2025                 case 'b':
2026                         option_background = optarg;
2027                         break;
2028                 case 'B':
2029                         backend = optarg;
2030                         break;
2031                 case 'o':
2032                         backend_options = optarg;
2033                         break;
2034                 case 'S':
2035                         option_socket_name = optarg;
2036                         break;
2037                 case 'i':
2038                         option_idle_time = strtol(optarg, &p, 0);
2039                         if (*p != '\0') {
2040                                 fprintf(stderr,
2041                                         "invalid idle time option: %s\n",
2042                                         optarg);
2043                                 exit(EXIT_FAILURE);
2044                         }
2045                         break;
2046                 case 's':
2047                         shell = optarg;
2048                         break;
2049                 case 'x':
2050                         xserver = 1;
2051                         break;
2052                 }
2053         }
2054
2055         display = wl_display_create();
2056
2057         loop = wl_display_get_event_loop(display);
2058         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2059         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2060         wl_event_loop_add_signal(loop, SIGQUIT, on_term_signal, ec);
2061
2062         wl_list_init(&child_process_list);
2063         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2064
2065         if (!backend) {
2066                 if (getenv("WAYLAND_DISPLAY"))
2067                         backend = "wayland-backend.so";
2068                 else if (getenv("DISPLAY"))
2069                         backend = "x11-backend.so";
2070                 else if (getenv("OPENWFD"))
2071                         backend = "openwfd-backend.so";
2072                 else
2073                         backend = "drm-backend.so";
2074         }
2075
2076         if (!shell)
2077                 shell = "desktop-shell.so";
2078
2079         backend_init = load_module(backend, "backend_init", &backend_module);
2080         if (!backend_init)
2081                 exit(EXIT_FAILURE);
2082
2083         shell_init = load_module(shell, "shell_init", &shell_module);
2084         if (!shell_init)
2085                 exit(EXIT_FAILURE);
2086
2087         ec = backend_init(display, backend_options);
2088         if (ec == NULL) {
2089                 fprintf(stderr, "failed to create compositor\n");
2090                 exit(EXIT_FAILURE);
2091         }
2092
2093         if (shell_init(ec) < 0)
2094                 exit(EXIT_FAILURE);
2095
2096         if (xserver)
2097                 wlsc_xserver_init(ec);
2098
2099         if (wl_display_add_socket(display, option_socket_name)) {
2100                 fprintf(stderr, "failed to add socket: %m\n");
2101                 exit(EXIT_FAILURE);
2102         }
2103
2104         wl_display_run(display);
2105
2106         if (xserver)
2107                 wlsc_xserver_destroy(ec);
2108
2109         if (ec->has_bind_display)
2110                 ec->unbind_display(ec->display, display);
2111         wl_display_destroy(display);
2112
2113         ec->destroy(ec);
2114
2115         return 0;
2116 }