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 <stdarg.h>
  28 #include <sys/ioctl.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <gdk-pixbuf/gdk-pixbuf.h>
  32 #include <math.h>
  33 #include <linux/input.h>
  34
  35 #include "wayland-server.h"
  36 #include "compositor.h"
  37
  38 struct wlsc_switcher {
  39         struct wlsc_compositor *compositor;
  40         struct wlsc_surface *current;
  41         struct wl_listener listener;
  42 };
  43
  44 /* The plan here is to generate a random anonymous socket name and
  45  * advertise that through a service on the session dbus.
  46  */
  47 static const char *option_socket_name = NULL;
  48 static const char *option_background = "background.jpg";
  49 static const char *option_geometry = "1024x640";
  50 static int option_connector = 0;
  51
  52 static const GOptionEntry option_entries[] = {
  53         { "background", 'b', 0, G_OPTION_ARG_STRING,
  54           &option_background, "Background image" },
  55         { "connector", 'c', 0, G_OPTION_ARG_INT,
  56           &option_connector, "KMS connector" },
  57         { "geometry", 'g', 0, G_OPTION_ARG_STRING,
  58           &option_geometry, "Geometry" },
  59         { "socket", 's', 0, G_OPTION_ARG_STRING,
  60           &option_socket_name, "Socket Name" },
  61         { NULL }
  62 };
  63
  64 static void
  65 wlsc_matrix_init(struct wlsc_matrix *matrix)
  66 {
  67         static const struct wlsc_matrix identity = {
  68                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  69         };
  70
  71         memcpy(matrix, &identity, sizeof identity);
  72 }
  73
  74 static void
  75 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  76 {
  77         struct wlsc_matrix tmp;
  78         const GLfloat *row, *column;
  79         div_t d;
  80         int i, j;
  81
  82         for (i = 0; i < 16; i++) {
  83                 tmp.d[i] = 0;
  84                 d = div(i, 4);
  85                 row = m->d + d.quot * 4;
  86                 column = n->d + d.rem;
  87                 for (j = 0; j < 4; j++)
  88                         tmp.d[i] += row[j] * column[j * 4];
  89         }
  90         memcpy(m, &tmp, sizeof tmp);
  91 }
  92
  93 static void
  94 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  95 {
  96         struct wlsc_matrix translate = {
  97                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
  98         };
  99
 100         wlsc_matrix_multiply(matrix, &translate);
 101 }
 102
 103 static void
 104 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 105 {
 106         struct wlsc_matrix scale = {
 107                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
 108         };
 109
 110         wlsc_matrix_multiply(matrix, &scale);
 111 }
 112
 113 static void
 114 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 115 {
 116         int i, j;
 117         struct wlsc_vector t;
 118
 119         for (i = 0; i < 4; i++) {
 120                 t.f[i] = 0;
 121                 for (j = 0; j < 4; j++)
 122                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 123         }
 124
 125         *v = t;
 126 }
 127
 128 static struct wlsc_surface *
 129 wlsc_surface_create(struct wlsc_compositor *compositor,
 130                     int32_t x, int32_t y, int32_t width, int32_t height)
 131 {
 132         struct wlsc_surface *surface;
 133
 134         surface = malloc(sizeof *surface);
 135         if (surface == NULL)
 136                 return NULL;
 137
 138         wl_list_init(&surface->surface.destroy_listener_list);
 139         wl_list_init(&surface->link);
 140         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 141
 142         glGenTextures(1, &surface->texture);
 143         glBindTexture(GL_TEXTURE_2D, surface->texture);
 144         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 145         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 146         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 147         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 148
 149         surface->compositor = compositor;
 150         surface->visual = NULL;
 151         surface->x = x;
 152         surface->y = y;
 153         surface->width = width;
 154         surface->height = height;
 155         wlsc_matrix_init(&surface->matrix);
 156         wlsc_matrix_scale(&surface->matrix, width, height, 1);
 157         wlsc_matrix_translate(&surface->matrix, x, y, 0);
 158
 159         wlsc_matrix_init(&surface->matrix_inv);
 160         wlsc_matrix_translate(&surface->matrix_inv, -x, -y, 0);
 161         wlsc_matrix_scale(&surface->matrix_inv, 1.0 / width, 1.0 / height, 1);
 162
 163         return surface;
 164 }
 165
 166 void
 167 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 168                               int32_t x, int32_t y,
 169                               int32_t width, int32_t height)
 170 {
 171         struct wlsc_compositor *compositor = surface->compositor;
 172
 173         pixman_region32_union_rect(&compositor->damage_region,
 174                                    &compositor->damage_region,
 175                                    surface->x + x, surface->y + y,
 176                                    width, height);
 177         wlsc_compositor_schedule_repaint(compositor);
 178 }
 179
 180 void
 181 wlsc_surface_damage(struct wlsc_surface *surface)
 182 {
 183         wlsc_surface_damage_rectangle(surface, 0, 0,
 184                                       surface->width, surface->height);
 185 }
 186
 187 uint32_t
 188 get_time(void)
 189 {
 190         struct timeval tv;
 191
 192         gettimeofday(&tv, NULL);
 193
 194         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 195 }
 196
 197 static void
 198 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 199 {
 200         struct wlsc_surface *surface =
 201                 container_of(resource, struct wlsc_surface, surface.resource);
 202         struct wl_listener *l, *next;
 203         uint32_t time;
 204
 205         wlsc_surface_damage(surface);
 206
 207         wl_list_remove(&surface->link);
 208         glDeleteTextures(1, &surface->texture);
 209
 210         time = get_time();
 211         wl_list_for_each_safe(l, next,
 212                               &surface->surface.destroy_listener_list, link)
 213                 l->func(l, &surface->surface, time);
 214
 215         free(surface);
 216 }
 217
 218 uint32_t *
 219 wlsc_load_image(const char *filename, int width, int height)
 220 {
 221         GdkPixbuf *pixbuf;
 222         GError *error = NULL;
 223         int stride, i, n_channels;
 224         unsigned char *pixels, *end, *argb_pixels, *s, *d;
 225
 226         pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
 227                                                    width, height,
 228                                                    FALSE, &error);
 229         if (error != NULL) {
 230                 fprintf(stderr, "failed to load image: %s\n", error->message);
 231                 g_error_free(error);
 232                 return NULL;
 233         }
 234
 235         stride = gdk_pixbuf_get_rowstride(pixbuf);
 236         pixels = gdk_pixbuf_get_pixels(pixbuf);
 237         n_channels = gdk_pixbuf_get_n_channels(pixbuf);
 238
 239         argb_pixels = malloc (height * width * 4);
 240         if (argb_pixels == NULL) {
 241                 g_object_unref(pixbuf);
 242                 return NULL;
 243         }
 244
 245         if (n_channels == 4) {
 246                 for (i = 0; i < height; i++) {
 247                         s = pixels + i * stride;
 248                         end = s + width * 4;
 249                         d = argb_pixels + i * width * 4;
 250                         while (s < end) {
 251                                 unsigned int t;
 252
 253 #define MULT(_d,c,a,t) \
 254         do { t = c * a + 0x7f; _d = ((t >> 8) + t) >> 8; } while (0)
 255
 256                                 MULT(d[0], s[2], s[3], t);
 257                                 MULT(d[1], s[1], s[3], t);
 258                                 MULT(d[2], s[0], s[3], t);
 259                                 d[3] = s[3];
 260                                 s += 4;
 261                                 d += 4;
 262                         }
 263                 }
 264         } else if (n_channels == 3) {
 265                 for (i = 0; i < height; i++) {
 266                         s = pixels + i * stride;
 267                         end = s + width * 3;
 268                         d = argb_pixels + i * width * 4;
 269                         while (s < end) {
 270                                 d[0] = s[2];
 271                                 d[1] = s[1];
 272                                 d[2] = s[0];
 273                                 d[3] = 0xff;
 274                                 s += 3;
 275                                 d += 4;
 276                         }
 277                 }
 278         }
 279
 280         g_object_unref(pixbuf);
 281
 282         return (uint32_t *) argb_pixels;
 283 }
 284
 285 static struct wl_buffer *
 286 create_buffer_from_png(struct wlsc_compositor *ec,
 287                        const char *filename, int width, int height)
 288 {
 289         uint32_t *pixels;
 290         struct wl_buffer *buffer;
 291
 292         pixels = wlsc_load_image(filename, width, height);
 293         if(pixels == NULL)
 294             return NULL;
 295
 296         buffer = ec->create_buffer(ec, width, height,
 297                                    &ec->compositor.premultiplied_argb_visual,
 298                                    pixels);
 299
 300         free(pixels);
 301
 302         return buffer;
 303 }
 304
 305 static const struct {
 306         const char *filename;
 307         int hotspot_x, hotspot_y;
 308 } pointer_images[] = {
 309         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 310         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 311         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 312         { DATADIR "/wayland/grabbing.png",              20, 17 },
 313         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 314         { DATADIR "/wayland/left_side.png",             10, 20 },
 315         { DATADIR "/wayland/right_side.png",            30, 19 },
 316         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 317         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 318         { DATADIR "/wayland/top_side.png",              18,  8 },
 319         { DATADIR "/wayland/xterm.png",                 15, 15 }
 320 };
 321
 322 static void
 323 create_pointer_images(struct wlsc_compositor *ec)
 324 {
 325         int i, count;
 326         const int width = 32, height = 32;
 327
 328         count = ARRAY_LENGTH(pointer_images);
 329         ec->pointer_buffers = malloc(count * sizeof *ec->pointer_buffers);
 330         for (i = 0; i < count; i++) {
 331                 ec->pointer_buffers[i] =
 332                         create_buffer_from_png(ec,
 333                                                pointer_images[i].filename,
 334                                                width, height);
 335         }
 336 }
 337
 338 static struct wlsc_surface *
 339 background_create(struct wlsc_output *output, const char *filename)
 340 {
 341         struct wlsc_surface *background;
 342         struct wl_buffer *buffer;
 343
 344         background = wlsc_surface_create(output->compositor,
 345                                          output->x, output->y,
 346                                          output->width, output->height);
 347         if (background == NULL)
 348                 return NULL;
 349
 350         buffer = create_buffer_from_png(output->compositor,
 351                                         filename,
 352                                         output->width, output->height);
 353         if (buffer == NULL) {
 354                 free(background);
 355                 return NULL;
 356         }
 357         buffer->attach(buffer, &background->surface);
 358
 359         return background;
 360 }
 361
 362 static void
 363 wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output)
 364 {
 365         struct wlsc_compositor *ec = es->compositor;
 366         struct wlsc_matrix tmp;
 367
 368         tmp = es->matrix;
 369         wlsc_matrix_multiply(&tmp, &output->matrix);
 370         glUniformMatrix4fv(ec->proj_uniform, 1, GL_FALSE, tmp.d);
 371         glUniform1i(ec->tex_uniform, 0);
 372
 373         if (es->visual == &ec->compositor.argb_visual) {
 374                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 375                 glEnable(GL_BLEND);
 376         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 377                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 378                 glEnable(GL_BLEND);
 379         } else {
 380                 glDisable(GL_BLEND);
 381         }
 382
 383         glBindTexture(GL_TEXTURE_2D, es->texture);
 384         glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
 385         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
 386                               5 * sizeof(GLfloat), NULL);
 387         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE,
 388                               5 * sizeof(GLfloat), (GLfloat *) 0 + 3);
 389         glEnableVertexAttribArray(0);
 390         glEnableVertexAttribArray(1);
 391         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 392 }
 393
 394 static void
 395 wlsc_surface_raise(struct wlsc_surface *surface)
 396 {
 397         struct wlsc_compositor *compositor = surface->compositor;
 398
 399         wl_list_remove(&surface->link);
 400         wl_list_insert(&compositor->surface_list, &surface->link);
 401 }
 402
 403 void
 404 wlsc_surface_update_matrix(struct wlsc_surface *es)
 405 {
 406         wlsc_matrix_init(&es->matrix);
 407         wlsc_matrix_scale(&es->matrix, es->width, es->height, 1);
 408         wlsc_matrix_translate(&es->matrix, es->x, es->y, 0);
 409
 410         wlsc_matrix_init(&es->matrix_inv);
 411         wlsc_matrix_translate(&es->matrix_inv, -es->x, -es->y, 0);
 412         wlsc_matrix_scale(&es->matrix_inv,
 413                           1.0 / es->width, 1.0 / es->height, 1);
 414 }
 415
 416 void
 417 wlsc_compositor_finish_frame(struct wlsc_compositor *compositor, int msecs)
 418 {
 419         wl_display_post_frame(compositor->wl_display, msecs);
 420         wl_event_source_timer_update(compositor->timer_source, 5);
 421         compositor->repaint_on_timeout = 1;
 422 }
 423
 424 static void
 425 wlsc_output_repaint(struct wlsc_output *output)
 426 {
 427         struct wlsc_compositor *ec = output->compositor;
 428         struct wlsc_surface *es;
 429         struct wlsc_input_device *eid;
 430         pixman_region32_t new_damage, total_damage;
 431         pixman_box32_t *extents;
 432
 433         glViewport(0, 0, output->width, output->height);
 434
 435         pixman_region32_init(&new_damage);
 436         pixman_region32_init(&total_damage);
 437         pixman_region32_intersect_rect(&new_damage,
 438                                        &ec->damage_region,
 439                                        output->x, output->y,
 440                                        output->width, output->height);
 441         pixman_region32_subtract(&ec->damage_region,
 442                                  &ec->damage_region, &new_damage);
 443         pixman_region32_union(&total_damage, &new_damage,
 444                               &output->previous_damage_region);
 445         pixman_region32_copy(&output->previous_damage_region, &new_damage);
 446
 447         extents = pixman_region32_extents(&total_damage);
 448         glEnable(GL_SCISSOR_TEST);
 449         glScissor(extents->x1, extents->y1,
 450                   extents->x2 - extents->x1, extents->y2 - extents->y1);
 451
 452         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 453         if (es->map_type == WLSC_SURFACE_MAP_FULLSCREEN &&
 454             es->fullscreen_output == output) {
 455                 if (es->width < output->width || es->height < output->height)
 456                         glClear(GL_COLOR_BUFFER_BIT);
 457                 wlsc_surface_draw(es, output);
 458         } else {
 459                 if (output->background)
 460                         wlsc_surface_draw(output->background, output);
 461                 else
 462                         glClear(GL_COLOR_BUFFER_BIT);
 463
 464                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 465                         if (ec->switcher &&
 466                             ec->switcher->current == es)
 467                                 continue;
 468
 469                         wlsc_surface_draw(es, output);
 470                 }
 471         }
 472
 473         if (ec->switcher)
 474                 wlsc_surface_draw(ec->switcher->current, output);
 475
 476         if (ec->focus)
 477                 wl_list_for_each(eid, &ec->input_device_list, link)
 478                         wlsc_surface_draw(eid->sprite, output);
 479 }
 480
 481 static void
 482 repaint(void *data)
 483 {
 484         struct wlsc_compositor *ec = data;
 485         struct wlsc_output *output;
 486
 487         if (!ec->repaint_needed) {
 488                 ec->repaint_on_timeout = 0;
 489                 return;
 490         }
 491
 492         wl_list_for_each(output, &ec->output_list, link)
 493                 wlsc_output_repaint(output);
 494
 495         ec->present(ec);
 496
 497         ec->repaint_needed = 0;
 498 }
 499
 500 void
 501 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 502 {
 503         compositor->repaint_needed = 1;
 504         if (compositor->repaint_on_timeout)
 505                 return;
 506
 507         wl_event_source_timer_update(compositor->timer_source, 1);
 508         compositor->repaint_on_timeout = 1;
 509 }
 510
 511 static void
 512 surface_destroy(struct wl_client *client,
 513                 struct wl_surface *surface)
 514 {
 515         wl_resource_destroy(&surface->resource, client);
 516 }
 517
 518 static void
 519 surface_attach(struct wl_client *client,
 520                struct wl_surface *surface, struct wl_buffer *buffer,
 521                int32_t x, int32_t y)
 522 {
 523         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 524
 525         /* FIXME: This damages the entire old surface, but we should
 526          * really just damage the part that's no longer covered by the
 527          * surface.  Anything covered by the new surface will be
 528          * damaged by the client. */
 529         wlsc_surface_damage(es);
 530
 531         buffer->attach(buffer, surface);
 532         es->buffer = buffer;
 533         es->x += x;
 534         es->y += y;
 535         es->width = buffer->width;
 536         es->height = buffer->height;
 537         wlsc_surface_update_matrix(es);
 538 }
 539
 540 static void
 541 surface_map_toplevel(struct wl_client *client,
 542                      struct wl_surface *surface)
 543 {
 544         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 545
 546         switch (es->map_type) {
 547         case WLSC_SURFACE_MAP_UNMAPPED:
 548                 es->x = 10 + random() % 400;
 549                 es->y = 10 + random() % 400;
 550                 wlsc_surface_update_matrix(es);
 551                 wl_list_insert(&es->compositor->surface_list, &es->link);
 552                 break;
 553         case WLSC_SURFACE_MAP_TOPLEVEL:
 554                 return;
 555         case WLSC_SURFACE_MAP_FULLSCREEN:
 556                 es->fullscreen_output = NULL;
 557                 es->x = es->saved_x;
 558                 es->y = es->saved_y;
 559                 wlsc_surface_update_matrix(es);
 560                 break;
 561         default:
 562                 break;
 563         }
 564
 565         wlsc_surface_damage(es);
 566         es->map_type = WLSC_SURFACE_MAP_TOPLEVEL;
 567 }
 568
 569 static void
 570 surface_map_transient(struct wl_client *client,
 571                       struct wl_surface *surface, struct wl_surface *parent,
 572                       int x, int y, uint32_t flags)
 573 {
 574         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 575         struct wlsc_surface *pes = (struct wlsc_surface *) parent;
 576
 577         switch (es->map_type) {
 578         case WLSC_SURFACE_MAP_UNMAPPED:
 579                 wl_list_insert(&es->compositor->surface_list, &es->link);
 580                 break;
 581         case WLSC_SURFACE_MAP_FULLSCREEN:
 582                 es->fullscreen_output = NULL;
 583                 break;
 584         default:
 585                 break;
 586         }
 587
 588         es->x = pes->x + x;
 589         es->y = pes->y + y;
 590
 591         wlsc_surface_update_matrix(es);
 592         wlsc_surface_damage(es);
 593         es->map_type = WLSC_SURFACE_MAP_TRANSIENT;
 594 }
 595
 596 static void
 597 surface_map_fullscreen(struct wl_client *client, struct wl_surface *surface)
 598 {
 599         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 600         struct wlsc_output *output;
 601
 602         switch (es->map_type) {
 603         case WLSC_SURFACE_MAP_UNMAPPED:
 604                 es->x = 10 + random() % 400;
 605                 es->y = 10 + random() % 400;
 606                 wl_list_insert(&es->compositor->surface_list, &es->link);
 607                 break;
 608         case WLSC_SURFACE_MAP_FULLSCREEN:
 609                 return;
 610         default:
 611                 break;
 612         }
 613
 614         /* FIXME: Fullscreen on first output */
 615         /* FIXME: Handle output going away */
 616         output = container_of(es->compositor->output_list.next,
 617                               struct wlsc_output, link);
 618
 619         es->saved_x = es->x;
 620         es->saved_y = es->y;
 621         es->x = (output->width - es->width) / 2;
 622         es->y = (output->height - es->height) / 2;
 623         es->fullscreen_output = output;
 624         wlsc_surface_update_matrix(es);
 625         wlsc_surface_damage(es);
 626         es->map_type = WLSC_SURFACE_MAP_FULLSCREEN;
 627 }
 628
 629 static void
 630 surface_damage(struct wl_client *client,
 631                struct wl_surface *surface,
 632                int32_t x, int32_t y, int32_t width, int32_t height)
 633 {
 634         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 635
 636         es->buffer->damage(es->buffer, surface, x, y, width, height);
 637
 638         wlsc_surface_damage_rectangle(es, x, y, width, height);
 639 }
 640
 641 const static struct wl_surface_interface surface_interface = {
 642         surface_destroy,
 643         surface_attach,
 644         surface_map_toplevel,
 645         surface_map_transient,
 646         surface_map_fullscreen,
 647         surface_damage
 648 };
 649
 650 static void
 651 wlsc_input_device_attach(struct wlsc_input_device *device,
 652                          struct wl_buffer *buffer, int x, int y)
 653 {
 654         wlsc_surface_damage(device->sprite);
 655
 656         buffer->attach(buffer, &device->sprite->surface);
 657         device->hotspot_x = x;
 658         device->hotspot_y = y;
 659
 660         device->sprite->x = device->input_device.x - device->hotspot_x;
 661         device->sprite->y = device->input_device.y - device->hotspot_y;
 662         device->sprite->width = buffer->width;
 663         device->sprite->height = buffer->height;
 664         wlsc_surface_update_matrix(device->sprite);
 665
 666         wlsc_surface_damage(device->sprite);
 667 }
 668
 669
 670 void
 671 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 672                                     enum wlsc_pointer_type type)
 673 {
 674         struct wlsc_compositor *compositor =
 675                 (struct wlsc_compositor *) device->input_device.compositor;
 676
 677         wlsc_input_device_attach(device,
 678                                  compositor->pointer_buffers[type],
 679                                  pointer_images[type].hotspot_x,
 680                                  pointer_images[type].hotspot_y);
 681 }
 682
 683 static void
 684 compositor_create_surface(struct wl_client *client,
 685                           struct wl_compositor *compositor, uint32_t id)
 686 {
 687         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
 688         struct wlsc_surface *surface;
 689
 690         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
 691         if (surface == NULL) {
 692                 wl_client_post_no_memory(client);
 693                 return;
 694         }
 695
 696         surface->surface.resource.destroy = destroy_surface;
 697
 698         surface->surface.resource.object.id = id;
 699         surface->surface.resource.object.interface = &wl_surface_interface;
 700         surface->surface.resource.object.implementation =
 701                 (void (**)(void)) &surface_interface;
 702         surface->surface.client = client;
 703
 704         wl_client_add_resource(client, &surface->surface.resource);
 705 }
 706
 707 const static struct wl_compositor_interface compositor_interface = {
 708         compositor_create_surface,
 709 };
 710
 711 static void
 712 wlsc_surface_transform(struct wlsc_surface *surface,
 713                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 714 {
 715         struct wlsc_vector v = { { x, y, 0, 1 } };
 716
 717         wlsc_matrix_transform(&surface->matrix_inv, &v);
 718         *sx = v.f[0] * surface->width;
 719         *sy = v.f[1] * surface->height;
 720 }
 721
 722 struct wlsc_surface *
 723 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
 724 {
 725         struct wlsc_compositor *ec =
 726                 (struct wlsc_compositor *) device->compositor;
 727         struct wlsc_surface *es;
 728
 729         wl_list_for_each(es, &ec->surface_list, link) {
 730                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
 731                 if (0 <= *sx && *sx < es->width &&
 732                     0 <= *sy && *sy < es->height)
 733                         return es;
 734         }
 735
 736         return NULL;
 737 }
 738
 739
 740 static void
 741 motion_grab_motion(struct wl_grab *grab,
 742                    uint32_t time, int32_t x, int32_t y)
 743 {
 744         struct wlsc_input_device *device =
 745                 (struct wlsc_input_device *) grab->input_device;
 746         struct wlsc_surface *es =
 747                 (struct wlsc_surface *) device->input_device.pointer_focus;
 748         int32_t sx, sy;
 749
 750         wlsc_surface_transform(es, x, y, &sx, &sy);
 751         wl_client_post_event(es->surface.client,
 752                              &device->input_device.object,
 753                              WL_INPUT_DEVICE_MOTION,
 754                              time, x, y, sx, sy);
 755 }
 756
 757 static void
 758 motion_grab_button(struct wl_grab *grab,
 759                    uint32_t time, int32_t button, int32_t state)
 760 {
 761         wl_client_post_event(grab->input_device->pointer_focus->client,
 762                              &grab->input_device->object,
 763                              WL_INPUT_DEVICE_BUTTON,
 764                              time, button, state);
 765 }
 766
 767 static void
 768 motion_grab_end(struct wl_grab *grab, uint32_t time)
 769 {
 770 }
 771
 772 static const struct wl_grab_interface motion_grab_interface = {
 773         motion_grab_motion,
 774         motion_grab_button,
 775         motion_grab_end
 776 };
 777
 778 void
 779 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
 780 {
 781         struct wlsc_surface *es;
 782         struct wlsc_compositor *ec =
 783                 (struct wlsc_compositor *) device->compositor;
 784         struct wlsc_output *output;
 785         const struct wl_grab_interface *interface;
 786         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 787         int32_t sx, sy;
 788
 789         /* FIXME: We need some multi head love here. */
 790         output = container_of(ec->output_list.next, struct wlsc_output, link);
 791         if (x < output->x)
 792                 x = 0;
 793         if (y < output->y)
 794                 y = 0;
 795         if (x >= output->x + output->width)
 796                 x = output->x + output->width - 1;
 797         if (y >= output->y + output->height)
 798                 y = output->y + output->height - 1;
 799
 800         device->x = x;
 801         device->y = y;
 802
 803         if (device->grab) {
 804                 interface = device->grab->interface;
 805                 interface->motion(device->grab, time, x, y);
 806         } else {
 807                 es = pick_surface(device, &sx, &sy);
 808                 wl_input_device_set_pointer_focus(device,
 809                                                   &es->surface,
 810                                                   time, x, y, sx, sy);
 811                 if (es)
 812                         wl_client_post_event(es->surface.client,
 813                                              &device->object,
 814                                              WL_INPUT_DEVICE_MOTION,
 815                                              time, x, y, sx, sy);
 816         }
 817
 818         wlsc_surface_damage(wd->sprite);
 819
 820         wd->sprite->x = device->x - wd->hotspot_x;
 821         wd->sprite->y = device->y - wd->hotspot_y;
 822         wlsc_surface_update_matrix(wd->sprite);
 823
 824         wlsc_surface_damage(wd->sprite);
 825 }
 826
 827 static void
 828 wlsc_surface_activate(struct wlsc_surface *surface,
 829                       struct wlsc_input_device *device, uint32_t time)
 830 {
 831         wlsc_surface_raise(surface);
 832         if (device->selection)
 833                 wlsc_selection_set_focus(device->selection,
 834                                          &surface->surface, time);
 835
 836         wl_input_device_set_keyboard_focus(&device->input_device,
 837                                            &surface->surface,
 838                                            time);
 839 }
 840
 841 void
 842 notify_button(struct wl_input_device *device,
 843               uint32_t time, int32_t button, int32_t state)
 844 {
 845         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 846         struct wlsc_surface *surface;
 847         struct wlsc_compositor *compositor =
 848                 (struct wlsc_compositor *) device->compositor;
 849
 850         surface = (struct wlsc_surface *) device->pointer_focus;
 851         uint32_t edges = 0;
 852         int32_t x, y;
 853
 854         if (state && surface && device->grab == NULL) {
 855                 wlsc_surface_activate(surface, wd, time);
 856                 wl_input_device_start_grab(device,
 857                                            &device->motion_grab,
 858                                            button, time);
 859         }
 860
 861         if (state && surface && button == BTN_LEFT &&
 862             (wd->modifier_state & MODIFIER_SUPER))
 863                 shell_move(NULL,
 864                            (struct wl_shell *) &compositor->shell,
 865                            &surface->surface, device, time);
 866         else if (state && surface && button == BTN_MIDDLE &&
 867                  (wd->modifier_state & MODIFIER_SUPER)) {
 868
 869                 x = device->grab_x - surface->x;
 870                 y = device->grab_y - surface->y;
 871
 872                 if (x < surface->width / 3)
 873                         edges |= WL_SHELL_RESIZE_LEFT;
 874                 else if (x < 2 * surface->width / 3)
 875                         edges |= 0;
 876                 else
 877                         edges |= WL_SHELL_RESIZE_RIGHT;
 878
 879                 if (y < surface->height / 3)
 880                         edges |= WL_SHELL_RESIZE_TOP;
 881                 else if (y < 2 * surface->height / 3)
 882                         edges |= 0;
 883                 else
 884                         edges |= WL_SHELL_RESIZE_BOTTOM;
 885
 886                 shell_resize(NULL,
 887                              (struct wl_shell *) &compositor->shell,
 888                              &surface->surface, device, time, edges);
 889         }
 890
 891         if (device->grab)
 892                 device->grab->interface->button(device->grab, time,
 893                                                 button, state);
 894
 895         if (!state && device->grab && device->grab_button == button)
 896                 wl_input_device_end_grab(device, time);
 897 }
 898
 899 static void
 900 wlsc_switcher_next(struct wlsc_switcher *switcher)
 901 {
 902         struct wl_list *l;
 903
 904         wlsc_surface_damage(switcher->current);
 905         l = switcher->current->link.next;
 906         if (l == &switcher->compositor->surface_list)
 907                 l = switcher->compositor->surface_list.next;
 908         switcher->current = container_of(l, struct wlsc_surface, link);
 909         wl_list_remove(&switcher->listener.link);
 910         wl_list_insert(switcher->current->surface.destroy_listener_list.prev,
 911                        &switcher->listener.link);
 912         wlsc_surface_damage(switcher->current);
 913 }
 914
 915 static void
 916 switcher_handle_surface_destroy(struct wl_listener *listener,
 917                                 struct wl_surface *surface, uint32_t time)
 918 {
 919         struct wlsc_switcher *switcher =
 920                 container_of(listener, struct wlsc_switcher, listener);
 921
 922         wlsc_switcher_next(switcher);
 923 }
 924
 925 static struct wlsc_switcher *
 926 wlsc_switcher_create(struct wlsc_compositor *compositor)
 927 {
 928         struct wlsc_switcher *switcher;
 929
 930         switcher = malloc(sizeof *switcher);
 931         switcher->compositor = compositor;
 932         switcher->current = container_of(compositor->surface_list.next,
 933                                          struct wlsc_surface, link);
 934         switcher->listener.func = switcher_handle_surface_destroy;
 935         wl_list_init(&switcher->listener.link);
 936
 937         return switcher;
 938 }
 939
 940 static void
 941 wlsc_switcher_destroy(struct wlsc_switcher *switcher)
 942 {
 943         wl_list_remove(&switcher->listener.link);
 944         free(switcher);
 945 }
 946
 947 void
 948 notify_key(struct wl_input_device *device,
 949            uint32_t time, uint32_t key, uint32_t state)
 950 {
 951         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 952         struct wlsc_compositor *compositor =
 953                 (struct wlsc_compositor *) device->compositor;
 954         uint32_t *k, *end;
 955         uint32_t modifier;
 956
 957         switch (key | wd->modifier_state) {
 958         case KEY_BACKSPACE | MODIFIER_CTRL | MODIFIER_ALT:
 959                 wl_display_terminate(compositor->wl_display);
 960                 return;
 961
 962         case KEY_TAB | MODIFIER_SUPER:
 963                 if (!state)
 964                         return;
 965                 if (wl_list_empty(&compositor->surface_list))
 966                         return;
 967                 if (compositor->switcher == NULL)
 968                         compositor->switcher = wlsc_switcher_create(compositor);
 969
 970                 wlsc_switcher_next(compositor->switcher);
 971                 return;
 972
 973         case KEY_LEFTMETA | MODIFIER_SUPER:
 974         case KEY_RIGHTMETA | MODIFIER_SUPER:
 975                 if (compositor->switcher && !state) {
 976                         wlsc_surface_activate(compositor->switcher->current,
 977                                               wd, time);
 978                         wlsc_switcher_destroy(compositor->switcher);
 979                         compositor->switcher = NULL;
 980                 }
 981                 break;
 982         }
 983
 984         switch (key) {
 985         case KEY_LEFTCTRL:
 986         case KEY_RIGHTCTRL:
 987                 modifier = MODIFIER_CTRL;
 988                 break;
 989
 990         case KEY_LEFTALT:
 991         case KEY_RIGHTALT:
 992                 modifier = MODIFIER_ALT;
 993                 break;
 994
 995         case KEY_LEFTMETA:
 996         case KEY_RIGHTMETA:
 997                 modifier = MODIFIER_SUPER;
 998                 break;
 999
1000         default:
1001                 modifier = 0;
1002                 break;
1003         }
1004
1005         if (state)
1006                 wd->modifier_state |= modifier;
1007         else
1008                 wd->modifier_state &= ~modifier;
1009
1010         end = device->keys.data + device->keys.size;
1011         for (k = device->keys.data; k < end; k++) {
1012                 if (*k == key)
1013                         *k = *--end;
1014         }
1015         device->keys.size = (void *) end - device->keys.data;
1016         if (state) {
1017                 k = wl_array_add(&device->keys, sizeof *k);
1018                 *k = key;
1019         }
1020
1021         if (device->keyboard_focus != NULL)
1022                 wl_client_post_event(device->keyboard_focus->client,
1023                                      &device->object,
1024                                      WL_INPUT_DEVICE_KEY, time, key, state);
1025 }
1026
1027 void
1028 notify_pointer_focus(struct wl_input_device *device,
1029                      uint32_t time, struct wlsc_output *output,
1030                      int32_t x, int32_t y)
1031 {
1032         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1033         struct wlsc_compositor *compositor =
1034                 (struct wlsc_compositor *) device->compositor;
1035         struct wlsc_surface *es;
1036         int32_t sx, sy;
1037
1038         if (output) {
1039                 device->x = x;
1040                 device->y = y;
1041                 es = pick_surface(device, &sx, &sy);
1042                 wl_input_device_set_pointer_focus(device,
1043                                                   &es->surface,
1044                                                   time, x, y, sx, sy);
1045
1046                 compositor->focus = 1;
1047
1048                 wd->sprite->x = device->x - wd->hotspot_x;
1049                 wd->sprite->y = device->y - wd->hotspot_y;
1050                 wlsc_surface_update_matrix(wd->sprite);
1051         } else {
1052                 wl_input_device_set_pointer_focus(device, NULL,
1053                                                   time, 0, 0, 0, 0);
1054                 compositor->focus = 0;
1055         }
1056
1057         wlsc_surface_damage(wd->sprite);
1058 }
1059
1060 void
1061 notify_keyboard_focus(struct wl_input_device *device,
1062                       uint32_t time, struct wlsc_output *output,
1063                       struct wl_array *keys)
1064 {
1065         struct wlsc_input_device *wd =
1066                 (struct wlsc_input_device *) device;
1067         struct wlsc_compositor *compositor =
1068                 (struct wlsc_compositor *) device->compositor;
1069         struct wlsc_surface *es;
1070
1071         if (!wl_list_empty(&compositor->surface_list))
1072                 es = container_of(compositor->surface_list.next,
1073                                   struct wlsc_surface, link);
1074         else
1075                 es = NULL;
1076
1077         if (output) {
1078                 wl_array_copy(&wd->input_device.keys, keys);
1079                 wl_input_device_set_keyboard_focus(&wd->input_device,
1080                                                    &es->surface, time);
1081         } else {
1082                 wl_input_device_set_keyboard_focus(&wd->input_device,
1083                                                    NULL, time);
1084         }
1085 }
1086
1087
1088 static void
1089 input_device_attach(struct wl_client *client,
1090                     struct wl_input_device *device_base,
1091                     uint32_t time,
1092                     struct wl_buffer *buffer, int32_t x, int32_t y)
1093 {
1094         struct wlsc_input_device *device =
1095                 (struct wlsc_input_device *) device_base;
1096
1097         if (time < device->input_device.pointer_focus_time)
1098                 return;
1099         if (device->input_device.pointer_focus == NULL)
1100                 return;
1101         if (device->input_device.pointer_focus->client != client)
1102                 return;
1103
1104         if (buffer == NULL) {
1105                 wlsc_input_device_set_pointer_image(device,
1106                                                     WLSC_POINTER_LEFT_PTR);
1107                 return;
1108         }
1109
1110         wlsc_input_device_attach(device, buffer, x, y);
1111 }
1112
1113 const static struct wl_input_device_interface input_device_interface = {
1114         input_device_attach,
1115 };
1116
1117 void
1118 wlsc_input_device_init(struct wlsc_input_device *device,
1119                        struct wlsc_compositor *ec)
1120 {
1121         wl_input_device_init(&device->input_device, &ec->compositor);
1122
1123         device->input_device.object.interface = &wl_input_device_interface;
1124         device->input_device.object.implementation =
1125                 (void (**)(void)) &input_device_interface;
1126         wl_display_add_object(ec->wl_display, &device->input_device.object);
1127         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1128
1129         device->sprite = wlsc_surface_create(ec,
1130                                              device->input_device.x,
1131                                              device->input_device.y, 32, 32);
1132         device->hotspot_x = 16;
1133         device->hotspot_y = 16;
1134
1135         device->input_device.motion_grab.interface = &motion_grab_interface;
1136
1137         wl_list_insert(ec->input_device_list.prev, &device->link);
1138
1139         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1140 }
1141
1142 static void
1143 wlsc_output_post_geometry(struct wl_client *client, struct wl_object *global)
1144 {
1145         struct wlsc_output *output =
1146                 container_of(global, struct wlsc_output, object);
1147
1148         wl_client_post_event(client, global,
1149                              WL_OUTPUT_GEOMETRY,
1150                              output->x, output->y,
1151                              output->width, output->height);
1152 }
1153
1154 static const char vertex_shader[] =
1155         "uniform mat4 proj;\n"
1156         "attribute vec4 position;\n"
1157         "attribute vec2 texcoord;\n"
1158         "varying vec2 v_texcoord;\n"
1159         "void main()\n"
1160         "{\n"
1161         "   gl_Position = proj * position;\n"
1162         "   v_texcoord = texcoord;\n"
1163         "}\n";
1164
1165 static const char fragment_shader[] =
1166         "precision mediump float;\n"
1167         "varying vec2 v_texcoord;\n"
1168         "uniform sampler2D tex;\n"
1169         "void main()\n"
1170         "{\n"
1171         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1172         "}\n";
1173
1174 static int
1175 init_shaders(struct wlsc_compositor *ec)
1176 {
1177         GLuint v, f, program;
1178         const char *p;
1179         char msg[512];
1180         GLfloat vertices[4 * 5];
1181         GLint status;
1182
1183         p = vertex_shader;
1184         v = glCreateShader(GL_VERTEX_SHADER);
1185         glShaderSource(v, 1, &p, NULL);
1186         glCompileShader(v);
1187         glGetShaderiv(v, GL_COMPILE_STATUS, &status);
1188         if (!status) {
1189                 glGetShaderInfoLog(v, sizeof msg, NULL, msg);
1190                 fprintf(stderr, "vertex shader info: %s\n", msg);
1191                 return -1;
1192         }
1193
1194         p = fragment_shader;
1195         f = glCreateShader(GL_FRAGMENT_SHADER);
1196         glShaderSource(f, 1, &p, NULL);
1197         glCompileShader(f);
1198         glGetShaderiv(f, GL_COMPILE_STATUS, &status);
1199         if (!status) {
1200                 glGetShaderInfoLog(f, sizeof msg, NULL, msg);
1201                 fprintf(stderr, "fragment shader info: %s\n", msg);
1202                 return -1;
1203         }
1204
1205         program = glCreateProgram();
1206         glAttachShader(program, v);
1207         glAttachShader(program, f);
1208         glBindAttribLocation(program, 0, "position");
1209         glBindAttribLocation(program, 1, "texcoord");
1210
1211         glLinkProgram(program);
1212         glGetProgramiv(program, GL_LINK_STATUS, &status);
1213         if (!status) {
1214                 glGetProgramInfoLog(program, sizeof msg, NULL, msg);
1215                 fprintf(stderr, "link info: %s\n", msg);
1216                 return -1;
1217         }
1218
1219         glUseProgram(program);
1220         ec->proj_uniform = glGetUniformLocation(program, "proj");
1221         ec->tex_uniform = glGetUniformLocation(program, "tex");
1222
1223         vertices[ 0] = 0.0;
1224         vertices[ 1] = 0.0;
1225         vertices[ 2] = 0.0;
1226         vertices[ 3] = 0.0;
1227         vertices[ 4] = 0.0;
1228
1229         vertices[ 5] = 0.0;
1230         vertices[ 6] = 1.0;
1231         vertices[ 7] = 0.0;
1232         vertices[ 8] = 0.0;
1233         vertices[ 9] = 1.0;
1234
1235         vertices[10] = 1.0;
1236         vertices[11] = 0.0;
1237         vertices[12] = 0.0;
1238         vertices[13] = 1.0;
1239         vertices[14] = 0.0;
1240
1241         vertices[15] = 1.0;
1242         vertices[16] = 1.0;
1243         vertices[17] = 0.0;
1244         vertices[18] = 1.0;
1245         vertices[19] = 1.0;
1246
1247         glGenBuffers(1, &ec->vbo);
1248         glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
1249         glBufferData(GL_ARRAY_BUFFER, sizeof vertices, vertices, GL_STATIC_DRAW);
1250
1251         return 0;
1252 }
1253
1254 void
1255 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1256                  int x, int y, int width, int height)
1257 {
1258         output->compositor = c;
1259         output->x = x;
1260         output->y = y;
1261         output->width = width;
1262         output->height = height;
1263
1264         pixman_region32_init(&output->previous_damage_region);
1265
1266         output->background =
1267                 background_create(output, option_background);
1268
1269         wlsc_matrix_init(&output->matrix);
1270         wlsc_matrix_translate(&output->matrix,
1271                               -output->x - output->width / 2.0,
1272                               -output->y - output->height / 2.0, 0);
1273         wlsc_matrix_scale(&output->matrix,
1274                           2.0 / output->width, 2.0 / output->height, 1);
1275
1276         output->object.interface = &wl_output_interface;
1277         wl_display_add_object(c->wl_display, &output->object);
1278         wl_display_add_global(c->wl_display, &output->object,
1279                               wlsc_output_post_geometry);
1280
1281         pixman_region32_union_rect(&c->damage_region,
1282                                    &c->damage_region,
1283                                    x, y, width, height);
1284 }
1285
1286 int
1287 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1288 {
1289         struct wl_event_loop *loop;
1290         const char *extensions;
1291
1292         ec->wl_display = display;
1293
1294         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1295
1296         wlsc_shm_init(ec);
1297
1298         wlsc_shell_init(ec);
1299
1300         wl_list_init(&ec->surface_list);
1301         wl_list_init(&ec->input_device_list);
1302         wl_list_init(&ec->output_list);
1303
1304         create_pointer_images(ec);
1305
1306         screenshooter_create(ec);
1307
1308         extensions = (const char *) glGetString(GL_EXTENSIONS);
1309         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1310                 fprintf(stderr,
1311                         "GL_EXT_texture_format_BGRA8888 not available\n");
1312                 return -1;
1313         }
1314
1315         glGenFramebuffers(1, &ec->fbo);
1316         glBindFramebuffer(GL_FRAMEBUFFER, ec->fbo);
1317         glActiveTexture(GL_TEXTURE0);
1318         if (init_shaders(ec) < 0)
1319                 return -1;
1320
1321         loop = wl_display_get_event_loop(ec->wl_display);
1322         ec->timer_source = wl_event_loop_add_timer(loop, repaint, ec);
1323         pixman_region32_init(&ec->damage_region);
1324         wlsc_compositor_schedule_repaint(ec);
1325
1326         return 0;
1327 }
1328
1329 static void on_term_signal(int signal_number, void *data)
1330 {
1331         struct wlsc_compositor *ec = data;
1332
1333         wl_display_terminate(ec->wl_display);
1334 }
1335
1336 int main(int argc, char *argv[])
1337 {
1338         struct wl_display *display;
1339         struct wlsc_compositor *ec;
1340         struct wl_event_loop *loop;
1341         GError *error = NULL;
1342         GOptionContext *context;
1343         int width, height;
1344
1345         g_type_init(); /* GdkPixbuf needs this, it seems. */
1346
1347         context = g_option_context_new(NULL);
1348         g_option_context_add_main_entries(context, option_entries, "Wayland");
1349         if (!g_option_context_parse(context, &argc, &argv, &error)) {
1350                 fprintf(stderr, "option parsing failed: %s\n", error->message);
1351                 exit(EXIT_FAILURE);
1352         }
1353         if (sscanf(option_geometry, "%dx%d", &width, &height) != 2) {
1354                 fprintf(stderr, "invalid geometry option: %s \n",
1355                         option_geometry);
1356                 exit(EXIT_FAILURE);
1357         }
1358
1359         display = wl_display_create();
1360
1361         ec = NULL;
1362
1363 #if BUILD_WAYLAND_COMPOSITOR
1364         if (getenv("WAYLAND_DISPLAY"))
1365                 ec = wayland_compositor_create(display, width, height);
1366 #endif
1367
1368 #if BUILD_X11_COMPOSITOR
1369         if (ec == NULL && getenv("DISPLAY"))
1370                 ec = x11_compositor_create(display, width, height);
1371 #endif
1372
1373 #if BUILD_DRM_COMPOSITOR
1374         if (ec == NULL)
1375                 ec = drm_compositor_create(display, option_connector);
1376 #endif
1377
1378         if (ec == NULL) {
1379                 fprintf(stderr, "failed to create compositor\n");
1380                 exit(EXIT_FAILURE);
1381         }
1382
1383         if (wl_display_add_socket(display, option_socket_name)) {
1384                 fprintf(stderr, "failed to add socket: %m\n");
1385                 exit(EXIT_FAILURE);
1386         }
1387
1388         loop = wl_display_get_event_loop(ec->wl_display);
1389         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
1390         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
1391
1392         wl_display_run(display);
1393
1394         wl_display_destroy(display);
1395
1396         ec->destroy(ec);
1397
1398         return 0;
1399 }