src/compositor.c

   1 /*
   2  * Copyright © 2010-2011 Intel Corporation
   3  * Copyright © 2008-2011 Kristian Høgsberg
   4  * Copyright © 2012 Collabora, Ltd.
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and
   7  * its documentation for any purpose is hereby granted without fee, provided
   8  * that the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of the copyright holders not be used in
  11  * advertising or publicity pertaining to distribution of the software
  12  * without specific, written prior permission.  The copyright holders make
  13  * no representations about the suitability of this software for any
  14  * purpose.  It is provided "as is" without express or implied warranty.
  15  *
  16  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  17  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  18  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  20  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  21  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  22  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #define _GNU_SOURCE
  26
  27 #include "config.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <stdint.h>
  33 #include <limits.h>
  34 #include <stdarg.h>
  35 #include <assert.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/wait.h>
  38 #include <sys/types.h>
  39 #include <sys/socket.h>
  40 #include <fcntl.h>
  41 #include <unistd.h>
  42 #include <math.h>
  43 #include <linux/input.h>
  44 #include <dlfcn.h>
  45 #include <signal.h>
  46 #include <setjmp.h>
  47 #include <execinfo.h>
  48
  49 #include <wayland-server.h>
  50 #include "compositor.h"
  51
  52 static struct wl_list child_process_list;
  53 static jmp_buf segv_jmp_buf;
  54
  55 static int
  56 sigchld_handler(int signal_number, void *data)
  57 {
  58         struct weston_process *p;
  59         int status;
  60         pid_t pid;
  61
  62         pid = waitpid(-1, &status, WNOHANG);
  63         if (!pid)
  64                 return 1;
  65
  66         wl_list_for_each(p, &child_process_list, link) {
  67                 if (p->pid == pid)
  68                         break;
  69         }
  70
  71         if (&p->link == &child_process_list) {
  72                 fprintf(stderr, "unknown child process exited\n");
  73                 return 1;
  74         }
  75
  76         wl_list_remove(&p->link);
  77         p->cleanup(p, status);
  78
  79         return 1;
  80 }
  81
  82 WL_EXPORT void
  83 weston_watch_process(struct weston_process *process)
  84 {
  85         wl_list_insert(&child_process_list, &process->link);
  86 }
  87
  88 static void
  89 child_client_exec(int sockfd, const char *path)
  90 {
  91         int clientfd;
  92         char s[32];
  93         sigset_t allsigs;
  94
  95         /* do not give our signal mask to the new process */
  96         sigfillset(&allsigs);
  97         sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
  98
  99         /* Launch clients as the user. */
 100         seteuid(getuid());
 101
 102         /* SOCK_CLOEXEC closes both ends, so we dup the fd to get a
 103          * non-CLOEXEC fd to pass through exec. */
 104         clientfd = dup(sockfd);
 105         if (clientfd == -1) {
 106                 fprintf(stderr, "compositor: dup failed: %m\n");
 107                 return;
 108         }
 109
 110         snprintf(s, sizeof s, "%d", clientfd);
 111         setenv("WAYLAND_SOCKET", s, 1);
 112
 113         if (execl(path, path, NULL) < 0)
 114                 fprintf(stderr, "compositor: executing '%s' failed: %m\n",
 115                         path);
 116 }
 117
 118 WL_EXPORT struct wl_client *
 119 weston_client_launch(struct weston_compositor *compositor,
 120                      struct weston_process *proc,
 121                      const char *path,
 122                      weston_process_cleanup_func_t cleanup)
 123 {
 124         int sv[2];
 125         pid_t pid;
 126         struct wl_client *client;
 127
 128         if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
 129                 fprintf(stderr, "weston_client_launch: "
 130                         "socketpair failed while launching '%s': %m\n",
 131                         path);
 132                 return NULL;
 133         }
 134
 135         pid = fork();
 136         if (pid == -1) {
 137                 close(sv[0]);
 138                 close(sv[1]);
 139                 fprintf(stderr,  "weston_client_launch: "
 140                         "fork failed while launching '%s': %m\n", path);
 141                 return NULL;
 142         }
 143
 144         if (pid == 0) {
 145                 child_client_exec(sv[1], path);
 146                 exit(-1);
 147         }
 148
 149         close(sv[1]);
 150
 151         client = wl_client_create(compositor->wl_display, sv[0]);
 152         if (!client) {
 153                 close(sv[0]);
 154                 fprintf(stderr, "weston_client_launch: "
 155                         "wl_client_create failed while launching '%s'.\n",
 156                         path);
 157                 return NULL;
 158         }
 159
 160         proc->pid = pid;
 161         proc->cleanup = cleanup;
 162         weston_watch_process(proc);
 163
 164         return client;
 165 }
 166
 167 static void
 168 surface_handle_buffer_destroy(struct wl_listener *listener,
 169                               struct wl_resource *resource, uint32_t time)
 170 {
 171         struct weston_surface *es =
 172                 container_of(listener, struct weston_surface,
 173                              buffer_destroy_listener);
 174
 175         es->buffer = NULL;
 176 }
 177
 178 static const pixman_region32_data_t undef_region_data;
 179
 180 static void
 181 undef_region(pixman_region32_t *region)
 182 {
 183         pixman_region32_fini(region);
 184         region->data = (pixman_region32_data_t *) &undef_region_data;
 185 }
 186
 187 static int
 188 region_is_undefined(pixman_region32_t *region)
 189 {
 190         return region->data == &undef_region_data;
 191 }
 192
 193 static void
 194 empty_region(pixman_region32_t *region)
 195 {
 196         if (!region_is_undefined(region))
 197                 pixman_region32_fini(region);
 198
 199         pixman_region32_init(region);
 200 }
 201
 202 WL_EXPORT struct weston_surface *
 203 weston_surface_create(struct weston_compositor *compositor)
 204 {
 205         struct weston_surface *surface;
 206
 207         surface = calloc(1, sizeof *surface);
 208         if (surface == NULL)
 209                 return NULL;
 210
 211         wl_list_init(&surface->surface.resource.destroy_listener_list);
 212
 213         wl_list_init(&surface->link);
 214         wl_list_init(&surface->layer_link);
 215
 216         surface->surface.resource.client = NULL;
 217
 218         surface->compositor = compositor;
 219         surface->image = EGL_NO_IMAGE_KHR;
 220         surface->alpha = 255;
 221         surface->pitch = 1;
 222
 223         surface->buffer = NULL;
 224         surface->output = NULL;
 225
 226         pixman_region32_init(&surface->damage);
 227         pixman_region32_init(&surface->opaque);
 228         pixman_region32_init(&surface->clip);
 229         undef_region(&surface->input);
 230         pixman_region32_init(&surface->transform.opaque);
 231         wl_list_init(&surface->frame_callback_list);
 232
 233         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 234
 235         wl_list_init(&surface->geometry.transformation_list);
 236         wl_list_insert(&surface->geometry.transformation_list,
 237                        &surface->transform.position.link);
 238         weston_matrix_init(&surface->transform.position.matrix);
 239         pixman_region32_init(&surface->transform.boundingbox);
 240         surface->geometry.dirty = 1;
 241
 242         return surface;
 243 }
 244
 245 WL_EXPORT void
 246 weston_surface_set_color(struct weston_surface *surface,
 247                  GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
 248 {
 249         surface->color[0] = red;
 250         surface->color[1] = green;
 251         surface->color[2] = blue;
 252         surface->color[3] = alpha;
 253         surface->shader = &surface->compositor->solid_shader;
 254 }
 255
 256 static void
 257 surface_to_global_float(struct weston_surface *surface,
 258                         int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
 259 {
 260         if (surface->transform.enabled) {
 261                 struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
 262
 263                 weston_matrix_transform(&surface->transform.matrix, &v);
 264
 265                 if (fabsf(v.f[3]) < 1e-6) {
 266                         fprintf(stderr, "warning: numerical instability in "
 267                                 "weston_surface_to_global(), divisor = %g\n",
 268                                 v.f[3]);
 269                         *x = 0;
 270                         *y = 0;
 271                         return;
 272                 }
 273
 274                 *x = v.f[0] / v.f[3];
 275                 *y = v.f[1] / v.f[3];
 276         } else {
 277                 *x = sx + surface->geometry.x;
 278                 *y = sy + surface->geometry.y;
 279         }
 280 }
 281
 282 WL_EXPORT void
 283 weston_surface_damage_below(struct weston_surface *surface)
 284 {
 285         struct weston_compositor *compositor = surface->compositor;
 286         pixman_region32_t damage;
 287
 288         pixman_region32_init(&damage);
 289         pixman_region32_subtract(&damage, &surface->transform.boundingbox,
 290                                  &surface->clip);
 291         pixman_region32_union(&compositor->damage,
 292                               &compositor->damage, &damage);
 293         pixman_region32_fini(&damage);
 294 }
 295
 296 static void
 297 surface_compute_bbox(struct weston_surface *surface, int32_t sx, int32_t sy,
 298                      int32_t width, int32_t height,
 299                      pixman_region32_t *bbox)
 300 {
 301         GLfloat min_x = HUGE_VALF,  min_y = HUGE_VALF;
 302         GLfloat max_x = -HUGE_VALF, max_y = -HUGE_VALF;
 303         int32_t s[4][2] = {
 304                 { sx,         sy },
 305                 { sx,         sy + height },
 306                 { sx + width, sy },
 307                 { sx + width, sy + height }
 308         };
 309         GLfloat int_x, int_y;
 310         int i;
 311
 312         for (i = 0; i < 4; ++i) {
 313                 GLfloat x, y;
 314                 surface_to_global_float(surface, s[i][0], s[i][1], &x, &y);
 315                 if (x < min_x)
 316                         min_x = x;
 317                 if (x > max_x)
 318                         max_x = x;
 319                 if (y < min_y)
 320                         min_y = y;
 321                 if (y > max_y)
 322                         max_y = y;
 323         }
 324
 325         int_x = floorf(min_x);
 326         int_y = floorf(min_y);
 327         pixman_region32_init_rect(bbox, int_x, int_y,
 328                                   ceilf(max_x) - int_x, ceilf(max_y) - int_y);
 329 }
 330
 331 static void
 332 weston_surface_update_transform_disable(struct weston_surface *surface)
 333 {
 334         surface->transform.enabled = 0;
 335
 336         /* round off fractions when not transformed */
 337         surface->geometry.x = roundf(surface->geometry.x);
 338         surface->geometry.y = roundf(surface->geometry.y);
 339
 340         pixman_region32_init_rect(&surface->transform.boundingbox,
 341                                   surface->geometry.x,
 342                                   surface->geometry.y,
 343                                   surface->geometry.width,
 344                                   surface->geometry.height);
 345
 346         if (surface->alpha == 255) {
 347                 pixman_region32_copy(&surface->transform.opaque,
 348                                      &surface->opaque);
 349                 pixman_region32_translate(&surface->transform.opaque,
 350                                           surface->geometry.x,
 351                                           surface->geometry.y);
 352         }
 353 }
 354
 355 static int
 356 weston_surface_update_transform_enable(struct weston_surface *surface)
 357 {
 358         struct weston_matrix *matrix = &surface->transform.matrix;
 359         struct weston_matrix *inverse = &surface->transform.inverse;
 360         struct weston_transform *tform;
 361
 362         surface->transform.enabled = 1;
 363
 364         /* Otherwise identity matrix, but with x and y translation. */
 365         surface->transform.position.matrix.d[12] = surface->geometry.x;
 366         surface->transform.position.matrix.d[13] = surface->geometry.y;
 367
 368         weston_matrix_init(matrix);
 369         wl_list_for_each(tform, &surface->geometry.transformation_list, link)
 370                 weston_matrix_multiply(matrix, &tform->matrix);
 371
 372         if (weston_matrix_invert(inverse, matrix) < 0) {
 373                 /* Oops, bad total transformation, not invertible */
 374                 fprintf(stderr, "error: weston_surface %p"
 375                         " transformation not invertible.\n", surface);
 376                 return -1;
 377         }
 378
 379         surface_compute_bbox(surface, 0, 0, surface->geometry.width,
 380                              surface->geometry.height,
 381                              &surface->transform.boundingbox);
 382
 383         return 0;
 384 }
 385
 386 WL_EXPORT void
 387 weston_surface_update_transform(struct weston_surface *surface)
 388 {
 389         if (!surface->geometry.dirty)
 390                 return;
 391
 392         surface->geometry.dirty = 0;
 393
 394         weston_surface_damage_below(surface);
 395
 396         pixman_region32_fini(&surface->transform.boundingbox);
 397         pixman_region32_fini(&surface->transform.opaque);
 398         pixman_region32_init(&surface->transform.opaque);
 399
 400         if (region_is_undefined(&surface->input))
 401                 pixman_region32_init_rect(&surface->input, 0, 0,
 402                                           surface->geometry.width,
 403                                           surface->geometry.height);
 404
 405         /* transform.position is always in transformation_list */
 406         if (surface->geometry.transformation_list.next ==
 407             &surface->transform.position.link &&
 408             surface->geometry.transformation_list.prev ==
 409             &surface->transform.position.link) {
 410                 weston_surface_update_transform_disable(surface);
 411         } else {
 412                 if (weston_surface_update_transform_enable(surface) < 0)
 413                         weston_surface_update_transform_disable(surface);
 414         }
 415
 416         /* weston_surface_damage() without update */
 417         pixman_region32_union(&surface->damage, &surface->damage,
 418                               &surface->transform.boundingbox);
 419
 420         if (weston_surface_is_mapped(surface))
 421                 weston_surface_assign_output(surface);
 422
 423         weston_compositor_schedule_repaint(surface->compositor);
 424 }
 425
 426 WL_EXPORT void
 427 weston_surface_to_global_float(struct weston_surface *surface,
 428                                int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
 429 {
 430         weston_surface_update_transform(surface);
 431
 432         surface_to_global_float(surface, sx, sy, x, y);
 433 }
 434
 435 WL_EXPORT void
 436 weston_surface_to_global(struct weston_surface *surface,
 437                          int32_t sx, int32_t sy, int32_t *x, int32_t *y)
 438 {
 439         GLfloat xf, yf;
 440
 441         weston_surface_to_global_float(surface, sx, sy, &xf, &yf);
 442         *x = floorf(xf);
 443         *y = floorf(yf);
 444 }
 445
 446 static void
 447 surface_from_global_float(struct weston_surface *surface,
 448                           int32_t x, int32_t y, GLfloat *sx, GLfloat *sy)
 449 {
 450         if (surface->transform.enabled) {
 451                 struct weston_vector v = { { x, y, 0.0f, 1.0f } };
 452
 453                 weston_matrix_transform(&surface->transform.inverse, &v);
 454
 455                 if (fabsf(v.f[3]) < 1e-6) {
 456                         fprintf(stderr, "warning: numerical instability in "
 457                                 "weston_surface_from_global(), divisor = %g\n",
 458                                 v.f[3]);
 459                         *sx = 0;
 460                         *sy = 0;
 461                         return;
 462                 }
 463
 464                 *sx = v.f[0] / v.f[3];
 465                 *sy = v.f[1] / v.f[3];
 466         } else {
 467                 *sx = x - surface->geometry.x;
 468                 *sy = y - surface->geometry.y;
 469         }
 470 }
 471
 472 WL_EXPORT void
 473 weston_surface_from_global(struct weston_surface *surface,
 474                            int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 475 {
 476         GLfloat sxf, syf;
 477
 478         weston_surface_update_transform(surface);
 479
 480         surface_from_global_float(surface, x, y, &sxf, &syf);
 481         *sx = floorf(sxf);
 482         *sy = floorf(syf);
 483 }
 484
 485 static void
 486 weston_surface_damage_rectangle(struct weston_surface *surface,
 487                                 int32_t sx, int32_t sy,
 488                                 int32_t width, int32_t height)
 489 {
 490         weston_surface_update_transform(surface);
 491
 492         if (surface->transform.enabled) {
 493                 pixman_region32_t box;
 494                 surface_compute_bbox(surface, sx, sy, width, height, &box);
 495                 pixman_region32_union(&surface->damage, &surface->damage,
 496                                       &box);
 497                 pixman_region32_fini(&box);
 498         } else {
 499                 pixman_region32_union_rect(&surface->damage, &surface->damage,
 500                                            surface->geometry.x + sx,
 501                                            surface->geometry.y + sy,
 502                                            width, height);
 503         }
 504
 505         weston_compositor_schedule_repaint(surface->compositor);
 506 }
 507
 508 WL_EXPORT void
 509 weston_surface_damage(struct weston_surface *surface)
 510 {
 511         weston_surface_update_transform(surface);
 512
 513         pixman_region32_union(&surface->damage, &surface->damage,
 514                               &surface->transform.boundingbox);
 515
 516         weston_compositor_schedule_repaint(surface->compositor);
 517 }
 518
 519 WL_EXPORT void
 520 weston_surface_configure(struct weston_surface *surface,
 521                          GLfloat x, GLfloat y, int width, int height)
 522 {
 523         surface->geometry.x = x;
 524         surface->geometry.y = y;
 525         surface->geometry.width = width;
 526         surface->geometry.height = height;
 527         surface->geometry.dirty = 1;
 528 }
 529
 530 WL_EXPORT void
 531 weston_surface_set_position(struct weston_surface *surface,
 532                             GLfloat x, GLfloat y)
 533 {
 534         surface->geometry.x = x;
 535         surface->geometry.y = y;
 536         surface->geometry.dirty = 1;
 537 }
 538
 539 WL_EXPORT int
 540 weston_surface_is_mapped(struct weston_surface *surface)
 541 {
 542         if (surface->output)
 543                 return 1;
 544         else
 545                 return 0;
 546 }
 547
 548 WL_EXPORT uint32_t
 549 weston_compositor_get_time(void)
 550 {
 551         struct timeval tv;
 552
 553         gettimeofday(&tv, NULL);
 554
 555         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 556 }
 557
 558 static struct weston_surface *
 559 weston_compositor_pick_surface(struct weston_compositor *compositor,
 560                                int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 561 {
 562         struct weston_surface *surface;
 563
 564         wl_list_for_each(surface, &compositor->surface_list, link) {
 565                 weston_surface_from_global(surface, x, y, sx, sy);
 566                 if (pixman_region32_contains_point(&surface->input,
 567                                                    *sx, *sy, NULL))
 568                         return surface;
 569         }
 570
 571         return NULL;
 572 }
 573
 574 static void
 575 weston_device_repick(struct wl_input_device *device, uint32_t time)
 576 {
 577         struct weston_input_device *wd = (struct weston_input_device *) device;
 578         const struct wl_pointer_grab_interface *interface;
 579         struct weston_surface *surface, *focus;
 580
 581         surface = weston_compositor_pick_surface(wd->compositor,
 582                                                  device->x, device->y,
 583                                                  &device->current_x,
 584                                                  &device->current_y);
 585
 586         if (&surface->surface != device->current) {
 587                 interface = device->pointer_grab->interface;
 588                 interface->focus(device->pointer_grab, time, &surface->surface,
 589                                  device->current_x, device->current_y);
 590                 device->current = &surface->surface;
 591         }
 592
 593         focus = (struct weston_surface *) device->pointer_grab->focus;
 594         if (focus)
 595                 weston_surface_from_global(focus, device->x, device->y,
 596                                            &device->pointer_grab->x, &device->pointer_grab->y);
 597 }
 598
 599 WL_EXPORT void
 600 weston_compositor_repick(struct weston_compositor *compositor)
 601 {
 602         struct weston_input_device *device;
 603         uint32_t time;
 604
 605         if (!compositor->focus)
 606                 return;
 607
 608         time = weston_compositor_get_time();
 609         wl_list_for_each(device, &compositor->input_device_list, link)
 610                 weston_device_repick(&device->input_device, time);
 611 }
 612
 613 static void
 614 weston_surface_unmap(struct weston_surface *surface)
 615 {
 616         struct wl_input_device *device = surface->compositor->input_device;
 617
 618         weston_surface_damage_below(surface);
 619         surface->output = NULL;
 620         wl_list_remove(&surface->link);
 621         wl_list_remove(&surface->layer_link);
 622
 623         if (device->keyboard_focus == &surface->surface)
 624                 wl_input_device_set_keyboard_focus(device, NULL,
 625                                                    weston_compositor_get_time());
 626         if (device->pointer_focus == &surface->surface)
 627                 wl_input_device_set_pointer_focus(device, NULL, 0, 0,
 628                                                   weston_compositor_get_time());
 629
 630         weston_compositor_schedule_repaint(surface->compositor);
 631 }
 632
 633 static void
 634 destroy_surface(struct wl_resource *resource)
 635 {
 636         struct weston_surface *surface =
 637                 container_of(resource,
 638                              struct weston_surface, surface.resource);
 639         struct weston_compositor *compositor = surface->compositor;
 640
 641         if (weston_surface_is_mapped(surface))
 642                 weston_surface_unmap(surface);
 643
 644         if (surface->texture)
 645                 glDeleteTextures(1, &surface->texture);
 646
 647         if (surface->buffer)
 648                 wl_list_remove(&surface->buffer_destroy_listener.link);
 649
 650         if (surface->image != EGL_NO_IMAGE_KHR)
 651                 compositor->destroy_image(compositor->display,
 652                                           surface->image);
 653
 654         pixman_region32_fini(&surface->transform.boundingbox);
 655         pixman_region32_fini(&surface->damage);
 656         pixman_region32_fini(&surface->opaque);
 657         pixman_region32_fini(&surface->clip);
 658         if (!region_is_undefined(&surface->input))
 659                 pixman_region32_fini(&surface->input);
 660
 661         free(surface);
 662 }
 663
 664 WL_EXPORT void
 665 weston_surface_destroy(struct weston_surface *surface)
 666 {
 667         /* Not a valid way to destroy a client surface */
 668         assert(surface->surface.resource.client == NULL);
 669
 670         destroy_surface(&surface->surface.resource);
 671 }
 672
 673 static void
 674 weston_surface_attach(struct wl_surface *surface, struct wl_buffer *buffer)
 675 {
 676         struct weston_surface *es = (struct weston_surface *) surface;
 677         struct weston_compositor *ec = es->compositor;
 678
 679         if (es->buffer) {
 680                 weston_buffer_post_release(es->buffer);
 681                 wl_list_remove(&es->buffer_destroy_listener.link);
 682         }
 683
 684         es->buffer = buffer;
 685
 686         if (!buffer) {
 687                 if (weston_surface_is_mapped(es))
 688                         weston_surface_unmap(es);
 689                 return;
 690         }
 691
 692         buffer->busy_count++;
 693         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 694                        &es->buffer_destroy_listener.link);
 695
 696         if (es->geometry.width != buffer->width ||
 697             es->geometry.height != buffer->height) {
 698                 undef_region(&es->input);
 699                 pixman_region32_fini(&es->opaque);
 700                 pixman_region32_init(&es->opaque);
 701         }
 702
 703         if (!es->texture) {
 704                 glGenTextures(1, &es->texture);
 705                 glBindTexture(GL_TEXTURE_2D, es->texture);
 706                 glTexParameteri(GL_TEXTURE_2D,
 707                                 GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 708                 glTexParameteri(GL_TEXTURE_2D,
 709                                 GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 710                 es->shader = &ec->texture_shader;
 711         } else {
 712                 glBindTexture(GL_TEXTURE_2D, es->texture);
 713         }
 714
 715         if (wl_buffer_is_shm(buffer)) {
 716                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 717                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 718                              es->pitch, es->buffer->height, 0,
 719                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 720         } else {
 721                 if (es->image != EGL_NO_IMAGE_KHR)
 722                         ec->destroy_image(ec->display, es->image);
 723                 es->image = ec->create_image(ec->display, NULL,
 724                                              EGL_WAYLAND_BUFFER_WL,
 725                                              buffer, NULL);
 726
 727                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 728
 729                 es->pitch = buffer->width;
 730         }
 731 }
 732
 733 static int
 734 texture_region(struct weston_surface *es, pixman_region32_t *region)
 735 {
 736         struct weston_compositor *ec = es->compositor;
 737         GLfloat *v, inv_width, inv_height;
 738         GLfloat sx, sy;
 739         pixman_box32_t *rectangles;
 740         unsigned int *p;
 741         int i, n;
 742
 743         rectangles = pixman_region32_rectangles(region, &n);
 744         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 745         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 746         inv_width = 1.0 / es->pitch;
 747         inv_height = 1.0 / es->geometry.height;
 748
 749         for (i = 0; i < n; i++, v += 16, p += 6) {
 750                 surface_from_global_float(es, rectangles[i].x1,
 751                                           rectangles[i].y1, &sx, &sy);
 752                 v[ 0] = rectangles[i].x1;
 753                 v[ 1] = rectangles[i].y1;
 754                 v[ 2] = sx * inv_width;
 755                 v[ 3] = sy * inv_height;
 756
 757                 surface_from_global_float(es, rectangles[i].x1,
 758                                           rectangles[i].y2, &sx, &sy);
 759                 v[ 4] = rectangles[i].x1;
 760                 v[ 5] = rectangles[i].y2;
 761                 v[ 6] = sx * inv_width;
 762                 v[ 7] = sy * inv_height;
 763
 764                 surface_from_global_float(es, rectangles[i].x2,
 765                                           rectangles[i].y1, &sx, &sy);
 766                 v[ 8] = rectangles[i].x2;
 767                 v[ 9] = rectangles[i].y1;
 768                 v[10] = sx * inv_width;
 769                 v[11] = sy * inv_height;
 770
 771                 surface_from_global_float(es, rectangles[i].x2,
 772                                           rectangles[i].y2, &sx, &sy);
 773                 v[12] = rectangles[i].x2;
 774                 v[13] = rectangles[i].y2;
 775                 v[14] = sx * inv_width;
 776                 v[15] = sy * inv_height;
 777
 778                 p[0] = i * 4 + 0;
 779                 p[1] = i * 4 + 1;
 780                 p[2] = i * 4 + 2;
 781                 p[3] = i * 4 + 2;
 782                 p[4] = i * 4 + 1;
 783                 p[5] = i * 4 + 3;
 784         }
 785
 786         return n;
 787 }
 788
 789 WL_EXPORT void
 790 weston_surface_draw(struct weston_surface *es, struct weston_output *output,
 791                     pixman_region32_t *damage)
 792 {
 793         struct weston_compositor *ec = es->compositor;
 794         GLfloat *v;
 795         pixman_region32_t repaint;
 796         GLint filter;
 797         int n;
 798
 799         pixman_region32_init(&repaint);
 800         pixman_region32_intersect(&repaint,
 801                                   &es->transform.boundingbox, damage);
 802         pixman_region32_subtract(&repaint, &repaint, &es->clip);
 803
 804         if (!pixman_region32_not_empty(&repaint))
 805                 goto out;
 806
 807         glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 808         glEnable(GL_BLEND);
 809
 810         if (ec->current_shader != es->shader) {
 811                 glUseProgram(es->shader->program);
 812                 ec->current_shader = es->shader;
 813         }
 814
 815         glUniformMatrix4fv(es->shader->proj_uniform,
 816                            1, GL_FALSE, output->matrix.d);
 817         glUniform1i(es->shader->tex_uniform, 0);
 818         glUniform4fv(es->shader->color_uniform, 1, es->color);
 819         glUniform1f(es->shader->alpha_uniform, es->alpha / 255.0);
 820         glUniform1f(es->shader->texwidth_uniform,
 821                     (GLfloat)es->geometry.width / es->pitch);
 822
 823         if (es->transform.enabled || output->zoom.active)
 824                 filter = GL_LINEAR;
 825         else
 826                 filter = GL_NEAREST;
 827
 828         n = texture_region(es, &repaint);
 829
 830         glBindTexture(GL_TEXTURE_2D, es->texture);
 831         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 832         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 833
 834         v = ec->vertices.data;
 835         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 836         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 837         glEnableVertexAttribArray(0);
 838         glEnableVertexAttribArray(1);
 839
 840         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 841
 842         glDisableVertexAttribArray(1);
 843         glDisableVertexAttribArray(0);
 844
 845         ec->vertices.size = 0;
 846         ec->indices.size = 0;
 847
 848 out:
 849         pixman_region32_fini(&repaint);
 850 }
 851
 852 WL_EXPORT void
 853 weston_surface_restack(struct weston_surface *surface, struct wl_list *below)
 854 {
 855         wl_list_remove(&surface->layer_link);
 856         wl_list_insert(below, &surface->layer_link);
 857         weston_surface_damage_below(surface);
 858         weston_surface_damage(surface);
 859 }
 860
 861 WL_EXPORT void
 862 weston_compositor_damage_all(struct weston_compositor *compositor)
 863 {
 864         struct weston_output *output;
 865
 866         wl_list_for_each(output, &compositor->output_list, link)
 867                 weston_output_damage(output);
 868 }
 869
 870 WL_EXPORT void
 871 weston_buffer_post_release(struct wl_buffer *buffer)
 872 {
 873         if (--buffer->busy_count > 0)
 874                 return;
 875
 876         assert(buffer->resource.client != NULL);
 877         wl_resource_queue_event(&buffer->resource, WL_BUFFER_RELEASE);
 878 }
 879
 880 WL_EXPORT void
 881 weston_output_damage(struct weston_output *output)
 882 {
 883         struct weston_compositor *compositor = output->compositor;
 884
 885         pixman_region32_union(&compositor->damage,
 886                               &compositor->damage, &output->region);
 887         weston_compositor_schedule_repaint(compositor);
 888 }
 889
 890 static void
 891 fade_frame(struct weston_animation *animation,
 892            struct weston_output *output, uint32_t msecs)
 893 {
 894         struct weston_compositor *compositor =
 895                 container_of(animation,
 896                              struct weston_compositor, fade.animation);
 897         struct weston_surface *surface;
 898
 899         surface = compositor->fade.surface;
 900         weston_spring_update(&compositor->fade.spring, msecs);
 901         weston_surface_set_color(surface, 0.0, 0.0, 0.0,
 902                                  compositor->fade.spring.current);
 903         weston_surface_damage(surface);
 904
 905         if (weston_spring_done(&compositor->fade.spring)) {
 906                 compositor->fade.spring.current =
 907                         compositor->fade.spring.target;
 908                 wl_list_remove(&animation->link);
 909                 wl_list_init(&animation->link);
 910
 911                 if (compositor->fade.spring.current < 0.001) {
 912                         destroy_surface(&surface->surface.resource);
 913                         compositor->fade.surface = NULL;
 914                 } else if (compositor->fade.spring.current > 0.999) {
 915                         compositor->state = WESTON_COMPOSITOR_SLEEPING;
 916                         compositor->shell->lock(compositor->shell);
 917                 }
 918         }
 919 }
 920
 921 struct weston_frame_callback {
 922         struct wl_resource resource;
 923         struct wl_list link;
 924 };
 925
 926 static void
 927 weston_output_repaint(struct weston_output *output, int msecs)
 928 {
 929         struct weston_compositor *ec = output->compositor;
 930         struct weston_surface *es;
 931         struct weston_layer *layer;
 932         struct weston_animation *animation, *next;
 933         struct weston_frame_callback *cb, *cnext;
 934         pixman_region32_t opaque, new_damage, output_damage;
 935         int32_t width, height;
 936
 937         weston_compositor_update_drag_surfaces(ec);
 938
 939         width = output->current->width +
 940                 output->border.left + output->border.right;
 941         height = output->current->height +
 942                 output->border.top + output->border.bottom;
 943         glViewport(0, 0, width, height);
 944
 945         /* Rebuild the surface list and update surface transforms up front. */
 946         wl_list_init(&ec->surface_list);
 947         wl_list_for_each(layer, &ec->layer_list, link) {
 948                 wl_list_for_each(es, &layer->surface_list, layer_link) {
 949                         weston_surface_update_transform(es);
 950                         wl_list_insert(ec->surface_list.prev, &es->link);
 951                 }
 952         }
 953
 954         if (output->assign_planes)
 955                 /*
 956                  * This will queue flips for the fbs and sprites where
 957                  * applicable and clear the damage for those surfaces.
 958                  * The repaint loop below will repaint everything
 959                  * else.
 960                  */
 961                 output->assign_planes(output);
 962
 963         pixman_region32_init(&new_damage);
 964         pixman_region32_init(&opaque);
 965
 966         wl_list_for_each(es, &ec->surface_list, link) {
 967                 pixman_region32_subtract(&es->damage, &es->damage, &opaque);
 968                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 969                 empty_region(&es->damage);
 970                 pixman_region32_copy(&es->clip, &opaque);
 971                 pixman_region32_union(&opaque, &opaque, &es->transform.opaque);
 972         }
 973
 974         pixman_region32_union(&ec->damage, &ec->damage, &new_damage);
 975
 976         pixman_region32_init(&output_damage);
 977         pixman_region32_union(&output_damage,
 978                               &ec->damage, &output->previous_damage);
 979         pixman_region32_copy(&output->previous_damage, &ec->damage);
 980         pixman_region32_intersect(&output_damage,
 981                                   &output_damage, &output->region);
 982         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 983
 984         pixman_region32_fini(&opaque);
 985         pixman_region32_fini(&new_damage);
 986
 987         if (output->dirty)
 988                 weston_output_update_matrix(output);
 989
 990         output->repaint(output, &output_damage);
 991
 992         pixman_region32_fini(&output_damage);
 993
 994         output->repaint_needed = 0;
 995
 996         weston_compositor_repick(ec);
 997         wl_event_loop_dispatch(ec->input_loop, 0);
 998
 999         wl_list_for_each_safe(cb, cnext, &output->frame_callback_list, link) {
1000                 wl_callback_send_done(&cb->resource, msecs);
1001                 wl_resource_destroy(&cb->resource, 0);
1002         }
1003
1004         wl_list_for_each_safe(animation, next, &ec->animation_list, link)
1005                 animation->frame(animation, output, msecs);
1006 }
1007
1008 static int
1009 weston_compositor_read_input(int fd, uint32_t mask, void *data)
1010 {
1011         struct weston_compositor *compositor = data;
1012
1013         wl_event_loop_dispatch(compositor->input_loop, 0);
1014
1015         return 1;
1016 }
1017
1018 WL_EXPORT void
1019 weston_output_finish_frame(struct weston_output *output, int msecs)
1020 {
1021         struct weston_compositor *compositor = output->compositor;
1022         struct wl_event_loop *loop =
1023                 wl_display_get_event_loop(compositor->wl_display);
1024         int fd;
1025
1026         if (output->repaint_needed) {
1027                 weston_output_repaint(output, msecs);
1028                 return;
1029         }
1030
1031         output->repaint_scheduled = 0;
1032         if (compositor->input_loop_source)
1033                 return;
1034
1035         fd = wl_event_loop_get_fd(compositor->input_loop);
1036         compositor->input_loop_source =
1037                 wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
1038                                      weston_compositor_read_input, compositor);
1039 }
1040
1041 static void
1042 idle_repaint(void *data)
1043 {
1044         struct weston_output *output = data;
1045
1046         weston_output_finish_frame(output, weston_compositor_get_time());
1047 }
1048
1049 WL_EXPORT void
1050 weston_layer_init(struct weston_layer *layer, struct wl_list *below)
1051 {
1052         wl_list_init(&layer->surface_list);
1053         wl_list_insert(below, &layer->link);
1054 }
1055
1056 WL_EXPORT void
1057 weston_compositor_schedule_repaint(struct weston_compositor *compositor)
1058 {
1059         struct weston_output *output;
1060         struct wl_event_loop *loop;
1061
1062         if (compositor->state == WESTON_COMPOSITOR_SLEEPING)
1063                 return;
1064
1065         loop = wl_display_get_event_loop(compositor->wl_display);
1066         wl_list_for_each(output, &compositor->output_list, link) {
1067                 output->repaint_needed = 1;
1068                 if (output->repaint_scheduled)
1069                         continue;
1070
1071                 wl_event_loop_add_idle(loop, idle_repaint, output);
1072                 output->repaint_scheduled = 1;
1073         }
1074
1075         if (compositor->input_loop_source) {
1076                 wl_event_source_remove(compositor->input_loop_source);
1077                 compositor->input_loop_source = NULL;
1078         }
1079 }
1080
1081 WL_EXPORT void
1082 weston_compositor_fade(struct weston_compositor *compositor, float tint)
1083 {
1084         struct weston_surface *surface;
1085         int done;
1086
1087         done = weston_spring_done(&compositor->fade.spring);
1088         compositor->fade.spring.target = tint;
1089         if (weston_spring_done(&compositor->fade.spring))
1090                 return;
1091
1092         if (done)
1093                 compositor->fade.spring.timestamp =
1094                         weston_compositor_get_time();
1095
1096         if (compositor->fade.surface == NULL) {
1097                 surface = weston_surface_create(compositor);
1098                 weston_surface_configure(surface, 0, 0, 8192, 8192);
1099                 weston_surface_set_color(surface, 0.0, 0.0, 0.0, 0.0);
1100                 wl_list_insert(&compositor->fade_layer.surface_list,
1101                                &surface->layer_link);
1102                 weston_surface_assign_output(surface);
1103                 compositor->fade.surface = surface;
1104                 pixman_region32_init(&surface->input);
1105         }
1106
1107         weston_surface_damage(compositor->fade.surface);
1108         if (wl_list_empty(&compositor->fade.animation.link))
1109                 wl_list_insert(compositor->animation_list.prev,
1110                                &compositor->fade.animation.link);
1111 }
1112
1113 static void
1114 surface_destroy(struct wl_client *client, struct wl_resource *resource)
1115 {
1116         wl_resource_destroy(resource, weston_compositor_get_time());
1117 }
1118
1119 WL_EXPORT void
1120 weston_surface_assign_output(struct weston_surface *es)
1121 {
1122         struct weston_compositor *ec = es->compositor;
1123         struct weston_output *output, *new_output;
1124         pixman_region32_t region;
1125         uint32_t max, area;
1126         pixman_box32_t *e;
1127
1128         weston_surface_update_transform(es);
1129
1130         new_output = NULL;
1131         max = 0;
1132         pixman_region32_init(&region);
1133         wl_list_for_each(output, &ec->output_list, link) {
1134                 pixman_region32_intersect(&region, &es->transform.boundingbox,
1135                                           &output->region);
1136
1137                 e = pixman_region32_extents(&region);
1138                 area = (e->x2 - e->x1) * (e->y2 - e->y1);
1139
1140                 if (area >= max) {
1141                         new_output = output;
1142                         max = area;
1143                 }
1144         }
1145         pixman_region32_fini(&region);
1146
1147         es->output = new_output;
1148         if (!wl_list_empty(&es->frame_callback_list)) {
1149                 wl_list_insert_list(new_output->frame_callback_list.prev,
1150                                     &es->frame_callback_list);
1151                 wl_list_init(&es->frame_callback_list);
1152         }
1153 }
1154
1155 static void
1156 surface_attach(struct wl_client *client,
1157                struct wl_resource *resource,
1158                struct wl_resource *buffer_resource, int32_t sx, int32_t sy)
1159 {
1160         struct weston_surface *es = resource->data;
1161         struct wl_buffer *buffer = NULL;
1162
1163         if (buffer_resource)
1164                 buffer = buffer_resource->data;
1165
1166         weston_surface_attach(&es->surface, buffer);
1167
1168         if (buffer && es->configure)
1169                 es->configure(es, sx, sy);
1170 }
1171
1172 static void
1173 surface_damage(struct wl_client *client,
1174                struct wl_resource *resource,
1175                int32_t x, int32_t y, int32_t width, int32_t height)
1176 {
1177         struct weston_surface *es = resource->data;
1178
1179         weston_surface_damage_rectangle(es, x, y, width, height);
1180
1181         if (es->buffer && wl_buffer_is_shm(es->buffer)) {
1182                 glBindTexture(GL_TEXTURE_2D, es->texture);
1183                 glPixelStorei(GL_UNPACK_ROW_LENGTH, es->pitch);
1184                 glPixelStorei(GL_UNPACK_SKIP_PIXELS, x);
1185                 glPixelStorei(GL_UNPACK_SKIP_ROWS, y);
1186
1187                 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
1188                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1189                                 wl_shm_buffer_get_data(es->buffer));
1190         }
1191 }
1192
1193 static void
1194 destroy_frame_callback(struct wl_resource *resource)
1195 {
1196         struct weston_frame_callback *cb = resource->data;
1197
1198         wl_list_remove(&cb->link);
1199         free(cb);
1200 }
1201
1202 static void
1203 surface_frame(struct wl_client *client,
1204               struct wl_resource *resource, uint32_t callback)
1205 {
1206         struct weston_frame_callback *cb;
1207         struct weston_surface *es = resource->data;
1208
1209         cb = malloc(sizeof *cb);
1210         if (cb == NULL) {
1211                 wl_resource_post_no_memory(resource);
1212                 return;
1213         }
1214
1215         cb->resource.object.interface = &wl_callback_interface;
1216         cb->resource.object.id = callback;
1217         cb->resource.destroy = destroy_frame_callback;
1218         cb->resource.client = client;
1219         cb->resource.data = cb;
1220
1221         wl_client_add_resource(client, &cb->resource);
1222
1223         if (es->output) {
1224                 wl_list_insert(es->output->frame_callback_list.prev,
1225                                &cb->link);
1226         } else {
1227                 wl_list_insert(es->frame_callback_list.prev, &cb->link);
1228         }
1229 }
1230
1231 static void
1232 surface_set_opaque_region(struct wl_client *client,
1233                           struct wl_resource *resource,
1234                           struct wl_resource *region_resource)
1235 {
1236         struct weston_surface *surface = resource->data;
1237         struct weston_region *region;
1238
1239         pixman_region32_fini(&surface->opaque);
1240
1241         if (region_resource) {
1242                 region = region_resource->data;
1243                 pixman_region32_init_rect(&surface->opaque, 0, 0,
1244                                           surface->geometry.width,
1245                                           surface->geometry.height);
1246                 pixman_region32_intersect(&surface->opaque,
1247                                           &surface->opaque, &region->region);
1248         } else {
1249                 pixman_region32_init(&surface->opaque);
1250         }
1251
1252         surface->geometry.dirty = 1;
1253 }
1254
1255 static void
1256 surface_set_input_region(struct wl_client *client,
1257                          struct wl_resource *resource,
1258                          struct wl_resource *region_resource)
1259 {
1260         struct weston_surface *surface = resource->data;
1261         struct weston_region *region;
1262
1263         if (region_resource) {
1264                 region = region_resource->data;
1265                 pixman_region32_init_rect(&surface->input, 0, 0,
1266                                           surface->geometry.width,
1267                                           surface->geometry.height);
1268                 pixman_region32_intersect(&surface->input,
1269                                           &surface->input, &region->region);
1270         } else {
1271                 pixman_region32_init_rect(&surface->input, 0, 0,
1272                                           surface->geometry.width,
1273                                           surface->geometry.height);
1274         }
1275
1276         weston_compositor_schedule_repaint(surface->compositor);
1277 }
1278
1279 static const struct wl_surface_interface surface_interface = {
1280         surface_destroy,
1281         surface_attach,
1282         surface_damage,
1283         surface_frame,
1284         surface_set_opaque_region,
1285         surface_set_input_region
1286 };
1287
1288 static void
1289 compositor_create_surface(struct wl_client *client,
1290                           struct wl_resource *resource, uint32_t id)
1291 {
1292         struct weston_compositor *ec = resource->data;
1293         struct weston_surface *surface;
1294
1295         surface = weston_surface_create(ec);
1296         if (surface == NULL) {
1297                 wl_resource_post_no_memory(resource);
1298                 return;
1299         }
1300
1301         surface->surface.resource.destroy = destroy_surface;
1302
1303         surface->surface.resource.object.id = id;
1304         surface->surface.resource.object.interface = &wl_surface_interface;
1305         surface->surface.resource.object.implementation =
1306                 (void (**)(void)) &surface_interface;
1307         surface->surface.resource.data = surface;
1308
1309         wl_client_add_resource(client, &surface->surface.resource);
1310 }
1311
1312 static void
1313 destroy_region(struct wl_resource *resource)
1314 {
1315         struct weston_region *region =
1316                 container_of(resource, struct weston_region, resource);
1317
1318         pixman_region32_fini(&region->region);
1319         free(region);
1320 }
1321
1322 static void
1323 region_destroy(struct wl_client *client, struct wl_resource *resource)
1324 {
1325         wl_resource_destroy(resource, weston_compositor_get_time());
1326 }
1327
1328 static void
1329 region_add(struct wl_client *client, struct wl_resource *resource,
1330            int32_t x, int32_t y, int32_t width, int32_t height)
1331 {
1332         struct weston_region *region = resource->data;
1333
1334         pixman_region32_union_rect(&region->region, &region->region,
1335                                    x, y, width, height);
1336 }
1337
1338 static void
1339 region_subtract(struct wl_client *client, struct wl_resource *resource,
1340                 int32_t x, int32_t y, int32_t width, int32_t height)
1341 {
1342         struct weston_region *region = resource->data;
1343         pixman_region32_t rect;
1344
1345         pixman_region32_init_rect(&rect, x, y, width, height);
1346         pixman_region32_subtract(&region->region, &region->region, &rect);
1347         pixman_region32_fini(&rect);
1348 }
1349
1350 static const struct wl_region_interface region_interface = {
1351         region_destroy,
1352         region_add,
1353         region_subtract
1354 };
1355
1356 static void
1357 compositor_create_region(struct wl_client *client,
1358                          struct wl_resource *resource, uint32_t id)
1359 {
1360         struct weston_region *region;
1361
1362         region = malloc(sizeof *region);
1363         if (region == NULL) {
1364                 wl_resource_post_no_memory(resource);
1365                 return;
1366         }
1367
1368         region->resource.destroy = destroy_region;
1369
1370         region->resource.object.id = id;
1371         region->resource.object.interface = &wl_region_interface;
1372         region->resource.object.implementation =
1373                 (void (**)(void)) &region_interface;
1374         region->resource.data = region;
1375
1376         pixman_region32_init(&region->region);
1377
1378         wl_client_add_resource(client, &region->resource);
1379 }
1380
1381 static const struct wl_compositor_interface compositor_interface = {
1382         compositor_create_surface,
1383         compositor_create_region
1384 };
1385
1386 WL_EXPORT void
1387 weston_compositor_wake(struct weston_compositor *compositor)
1388 {
1389         compositor->state = WESTON_COMPOSITOR_ACTIVE;
1390         weston_compositor_fade(compositor, 0.0);
1391
1392         wl_event_source_timer_update(compositor->idle_source,
1393                                      compositor->idle_time * 1000);
1394 }
1395
1396 static void
1397 weston_compositor_dpms_on(struct weston_compositor *compositor)
1398 {
1399         struct weston_output *output;
1400
1401         wl_list_for_each(output, &compositor->output_list, link)
1402                 if (output->set_dpms)
1403                         output->set_dpms(output, WESTON_DPMS_ON);
1404 }
1405
1406 WL_EXPORT void
1407 weston_compositor_activity(struct weston_compositor *compositor)
1408 {
1409         if (compositor->state == WESTON_COMPOSITOR_ACTIVE) {
1410                 weston_compositor_wake(compositor);
1411         } else {
1412                 weston_compositor_dpms_on(compositor);
1413                 compositor->shell->unlock(compositor->shell);
1414         }
1415 }
1416
1417 static void
1418 weston_compositor_idle_inhibit(struct weston_compositor *compositor)
1419 {
1420         weston_compositor_activity(compositor);
1421         compositor->idle_inhibit++;
1422 }
1423
1424 static void
1425 weston_compositor_idle_release(struct weston_compositor *compositor)
1426 {
1427         compositor->idle_inhibit--;
1428         weston_compositor_activity(compositor);
1429 }
1430
1431 static int
1432 idle_handler(void *data)
1433 {
1434         struct weston_compositor *compositor = data;
1435
1436         if (compositor->idle_inhibit)
1437                 return 1;
1438
1439         weston_compositor_fade(compositor, 1.0);
1440
1441         return 1;
1442 }
1443
1444 static  void
1445 weston_input_update_drag_surface(struct wl_input_device *input_device,
1446                                  int dx, int dy);
1447
1448 WL_EXPORT void
1449 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1450 {
1451         struct weston_output *output;
1452         const struct wl_pointer_grab_interface *interface;
1453         struct weston_input_device *wd = (struct weston_input_device *) device;
1454         struct weston_compositor *ec = wd->compositor;
1455         int x_valid = 0, y_valid = 0;
1456         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1457
1458         weston_compositor_activity(ec);
1459
1460         wl_list_for_each(output, &ec->output_list, link) {
1461                 if (output->x <= x && x < output->x + output->current->width)
1462                         x_valid = 1;
1463
1464                 if (output->y <= y && y < output->y + output->current->height)
1465                         y_valid = 1;
1466
1467                 /* FIXME: calculate this only on output addition/deletion */
1468                 if (output->x < min_x)
1469                         min_x = output->x;
1470                 if (output->y < min_y)
1471                         min_y = output->y;
1472
1473                 if (output->x + output->current->width > max_x)
1474                         max_x = output->x + output->current->width - 1;
1475                 if (output->y + output->current->height > max_y)
1476                         max_y = output->y + output->current->height - 1;
1477         }
1478
1479         if (!x_valid) {
1480                 if (x < min_x)
1481                         x = min_x;
1482                 else if (x >= max_x)
1483                         x = max_x;
1484         }
1485         if (!y_valid) {
1486                 if (y < min_y)
1487                         y = min_y;
1488                 else  if (y >= max_y)
1489                         y = max_y;
1490         }
1491
1492         weston_input_update_drag_surface(device,
1493                                          x - device->x, y - device->y);
1494
1495         device->x = x;
1496         device->y = y;
1497
1498         wl_list_for_each(output, &ec->output_list, link)
1499                 if (output->zoom.active &&
1500                     pixman_region32_contains_point(&output->region, x, y, NULL))
1501                         weston_output_update_zoom(output, x, y);
1502
1503         weston_device_repick(device, time);
1504         interface = device->pointer_grab->interface;
1505         interface->motion(device->pointer_grab, time,
1506                           device->pointer_grab->x, device->pointer_grab->y);
1507
1508         if (wd->sprite) {
1509                 weston_surface_set_position(wd->sprite,
1510                                             device->x - wd->hotspot_x,
1511                                             device->y - wd->hotspot_y);
1512
1513                 weston_compositor_schedule_repaint(ec);
1514         }
1515 }
1516
1517 WL_EXPORT void
1518 weston_surface_activate(struct weston_surface *surface,
1519                         struct weston_input_device *device, uint32_t time)
1520 {
1521         wl_input_device_set_keyboard_focus(&device->input_device,
1522                                            &surface->surface, time);
1523         wl_data_device_set_keyboard_focus(&device->input_device);
1524 }
1525
1526 WL_EXPORT void
1527 notify_button(struct wl_input_device *device,
1528               uint32_t time, int32_t button, int32_t state)
1529 {
1530         struct weston_input_device *wd = (struct weston_input_device *) device;
1531         struct weston_compositor *compositor = wd->compositor;
1532
1533         if (state) {
1534                 weston_compositor_idle_inhibit(compositor);
1535                 if (device->button_count == 0) {
1536                         device->grab_button = button;
1537                         device->grab_time = time;
1538                         device->grab_x = device->x;
1539                         device->grab_y = device->y;
1540                 }
1541                 device->button_count++;
1542         } else {
1543                 weston_compositor_idle_release(compositor);
1544                 device->button_count--;
1545         }
1546
1547         weston_compositor_run_binding(compositor, wd, time, 0, button, 0, state);
1548
1549         device->pointer_grab->interface->button(device->pointer_grab, time, button, state);
1550
1551 }
1552
1553 WL_EXPORT void
1554 notify_axis(struct wl_input_device *device,
1555               uint32_t time, uint32_t axis, int32_t value)
1556 {
1557         struct weston_input_device *wd = (struct weston_input_device *) device;
1558         struct weston_compositor *compositor = wd->compositor;
1559
1560         weston_compositor_activity(compositor);
1561
1562         if (value)
1563                 weston_compositor_run_binding(compositor, wd,
1564                                                 time, 0, 0, axis, value);
1565         else
1566                 return;
1567
1568         if (device->pointer_focus_resource)
1569                 wl_resource_post_event(device->pointer_focus_resource,
1570                                 WL_INPUT_DEVICE_AXIS, time, axis, value);
1571 }
1572
1573 static void
1574 update_modifier_state(struct weston_input_device *device,
1575                       uint32_t key, uint32_t state)
1576 {
1577         uint32_t modifier;
1578
1579         switch (key) {
1580         case KEY_LEFTCTRL:
1581         case KEY_RIGHTCTRL:
1582                 modifier = MODIFIER_CTRL;
1583                 break;
1584
1585         case KEY_LEFTALT:
1586         case KEY_RIGHTALT:
1587                 modifier = MODIFIER_ALT;
1588                 break;
1589
1590         case KEY_LEFTMETA:
1591         case KEY_RIGHTMETA:
1592                 modifier = MODIFIER_SUPER;
1593                 break;
1594
1595         default:
1596                 modifier = 0;
1597                 break;
1598         }
1599
1600         if (state)
1601                 device->modifier_state |= modifier;
1602         else
1603                 device->modifier_state &= ~modifier;
1604 }
1605
1606 WL_EXPORT void
1607 notify_key(struct wl_input_device *device,
1608            uint32_t time, uint32_t key, uint32_t state)
1609 {
1610         struct weston_input_device *wd = (struct weston_input_device *) device;
1611         struct weston_compositor *compositor = wd->compositor;
1612         uint32_t *k, *end;
1613
1614         if (state) {
1615                 weston_compositor_idle_inhibit(compositor);
1616                 device->grab_key = key;
1617                 device->grab_time = time;
1618         } else {
1619                 weston_compositor_idle_release(compositor);
1620         }
1621
1622         update_modifier_state(wd, key, state);
1623         end = device->keys.data + device->keys.size;
1624         for (k = device->keys.data; k < end; k++) {
1625                 if (*k == key)
1626                         *k = *--end;
1627         }
1628         device->keys.size = (void *) end - device->keys.data;
1629         if (state) {
1630                 k = wl_array_add(&device->keys, sizeof *k);
1631                 *k = key;
1632         }
1633
1634         if (device->keyboard_grab == &device->default_keyboard_grab)
1635                 weston_compositor_run_binding(compositor, wd,
1636                                               time, key, 0, 0, state);
1637
1638         device->keyboard_grab->interface->key(device->keyboard_grab,
1639                                               time, key, state);
1640 }
1641
1642 WL_EXPORT void
1643 notify_pointer_focus(struct wl_input_device *device,
1644                      uint32_t time, struct weston_output *output,
1645                      int32_t x, int32_t y)
1646 {
1647         struct weston_input_device *wd = (struct weston_input_device *) device;
1648         struct weston_compositor *compositor = wd->compositor;
1649
1650         if (output) {
1651                 weston_input_update_drag_surface(device, x - device->x,
1652                                                  y - device->y);
1653
1654                 device->x = x;
1655                 device->y = y;
1656                 compositor->focus = 1;
1657                 weston_compositor_repick(compositor);
1658         } else {
1659                 compositor->focus = 0;
1660                 weston_compositor_repick(compositor);
1661         }
1662 }
1663
1664 static void
1665 destroy_device_saved_kbd_focus(struct wl_listener *listener,
1666                                struct wl_resource *resource, uint32_t time)
1667 {
1668         struct weston_input_device *wd;
1669
1670         wd = container_of(listener, struct weston_input_device,
1671                           saved_kbd_focus_listener);
1672
1673         wd->saved_kbd_focus = NULL;
1674 }
1675
1676 WL_EXPORT void
1677 notify_keyboard_focus(struct wl_input_device *device,
1678                       uint32_t time, struct wl_array *keys)
1679 {
1680         struct weston_input_device *wd =
1681                 (struct weston_input_device *) device;
1682         struct weston_compositor *compositor = wd->compositor;
1683         struct wl_surface *surface;
1684         uint32_t *k;
1685
1686         if (keys) {
1687                 wl_array_copy(&wd->input_device.keys, keys);
1688                 wd->modifier_state = 0;
1689                 wl_array_for_each(k, &device->keys) {
1690                         weston_compositor_idle_inhibit(compositor);
1691                         update_modifier_state(wd, *k, 1);
1692                 }
1693
1694                 surface = wd->saved_kbd_focus;
1695
1696                 if (surface) {
1697                         wl_list_remove(&wd->saved_kbd_focus_listener.link);
1698                         wl_input_device_set_keyboard_focus(&wd->input_device,
1699                                                            surface, time);
1700                         wd->saved_kbd_focus = NULL;
1701                 }
1702         } else {
1703                 wl_array_for_each(k, &device->keys)
1704                         weston_compositor_idle_release(compositor);
1705
1706                 wd->modifier_state = 0;
1707
1708                 surface = wd->input_device.keyboard_focus;
1709
1710                 if (surface) {
1711                         wd->saved_kbd_focus = surface;
1712                         wd->saved_kbd_focus_listener.func =
1713                                 destroy_device_saved_kbd_focus;
1714                         wl_list_insert(surface->resource.destroy_listener_list.prev,
1715                                        &wd->saved_kbd_focus_listener.link);
1716                 }
1717
1718                 wl_input_device_set_keyboard_focus(&wd->input_device,
1719                                                    NULL, time);
1720                 /* FIXME: We really need keyboard grab cancel here to
1721                  * let the grab shut down properly.  As it is we leak
1722                  * the grab data. */
1723                 wl_input_device_end_keyboard_grab(&wd->input_device, time);
1724         }
1725 }
1726
1727 /* TODO: share this function with wayland-server.c */
1728 static struct wl_resource *
1729 find_resource_for_surface(struct wl_list *list, struct wl_surface *surface)
1730 {
1731         struct wl_resource *r;
1732
1733         if (!surface)
1734                 return NULL;
1735
1736         wl_list_for_each(r, list, link) {
1737                 if (r->client == surface->resource.client)
1738                         return r;
1739         }
1740
1741         return NULL;
1742 }
1743
1744 static void
1745 lose_touch_focus_resource(struct wl_listener *listener,
1746                           struct wl_resource *resource, uint32_t time)
1747 {
1748         struct weston_input_device *device =
1749                 container_of(listener, struct weston_input_device,
1750                              touch_focus_resource_listener);
1751
1752         device->touch_focus_resource = NULL;
1753 }
1754
1755 static void
1756 lose_touch_focus(struct wl_listener *listener,
1757                  struct wl_resource *resource, uint32_t time)
1758 {
1759         struct weston_input_device *device =
1760                 container_of(listener, struct weston_input_device,
1761                              touch_focus_listener);
1762
1763         device->touch_focus = NULL;
1764 }
1765
1766 static void
1767 touch_set_focus(struct weston_input_device *device,
1768                 struct wl_surface *surface, uint32_t time)
1769 {
1770         struct wl_input_device *input_device = &device->input_device;
1771         struct wl_resource *resource;
1772
1773         if (device->touch_focus == surface)
1774                 return;
1775
1776         if (surface) {
1777                 resource =
1778                         find_resource_for_surface(&input_device->resource_list,
1779                                                   surface);
1780                 if (!resource) {
1781                         fprintf(stderr, "couldn't find resource\n");
1782                         return;
1783                 }
1784
1785                 device->touch_focus_resource_listener.func =
1786                         lose_touch_focus_resource;
1787                 wl_list_insert(resource->destroy_listener_list.prev,
1788                                &device->touch_focus_resource_listener.link);
1789                 device->touch_focus_listener.func = lose_touch_focus;
1790                 wl_list_insert(surface->resource.destroy_listener_list.prev,
1791                                &device->touch_focus_listener.link);
1792
1793                 device->touch_focus = surface;
1794                 device->touch_focus_resource = resource;
1795         } else {
1796                 if (device->touch_focus)
1797                         wl_list_remove(&device->touch_focus_listener.link);
1798                 if (device->touch_focus_resource)
1799                         wl_list_remove(&device->touch_focus_resource_listener.link);
1800                 device->touch_focus = NULL;
1801                 device->touch_focus_resource = NULL;
1802         }
1803 }
1804
1805 /**
1806  * notify_touch - emulates button touches and notifies surfaces accordingly.
1807  *
1808  * It assumes always the correct cycle sequence until it gets here: touch_down
1809  * → touch_update → ... → touch_update → touch_end. The driver is responsible
1810  * for sending along such order.
1811  *
1812  */
1813 WL_EXPORT void
1814 notify_touch(struct wl_input_device *device, uint32_t time, int touch_id,
1815              int x, int y, int touch_type)
1816 {
1817         struct weston_input_device *wd = (struct weston_input_device *) device;
1818         struct weston_compositor *ec = wd->compositor;
1819         struct weston_surface *es;
1820         int32_t sx, sy;
1821
1822         switch (touch_type) {
1823         case WL_INPUT_DEVICE_TOUCH_DOWN:
1824                 weston_compositor_idle_inhibit(ec);
1825
1826                 wd->num_tp++;
1827
1828                 /* the first finger down picks the surface, and all further go
1829                  * to that surface for the remainder of the touch session i.e.
1830                  * until all touch points are up again. */
1831                 if (wd->num_tp == 1) {
1832                         es = weston_compositor_pick_surface(ec, x, y, &sx, &sy);
1833                         touch_set_focus(wd, &es->surface, time);
1834                 } else if (wd->touch_focus) {
1835                         es = (struct weston_surface *) wd->touch_focus;
1836                         weston_surface_from_global(es, x, y, &sx, &sy);
1837                 }
1838
1839                 if (wd->touch_focus_resource && wd->touch_focus)
1840                         wl_input_device_send_touch_down(wd->touch_focus_resource,
1841                                                         time, &wd->touch_focus->resource,
1842                                                         touch_id, sx, sy);
1843                 break;
1844         case WL_INPUT_DEVICE_TOUCH_MOTION:
1845                 es = (struct weston_surface *) wd->touch_focus;
1846                 if (!es)
1847                         break;
1848
1849                 weston_surface_from_global(es, x, y, &sx, &sy);
1850                 if (wd->touch_focus_resource)
1851                         wl_input_device_send_touch_motion(wd->touch_focus_resource,
1852                                                           time, touch_id, sx, sy);
1853                 break;
1854         case WL_INPUT_DEVICE_TOUCH_UP:
1855                 weston_compositor_idle_release(ec);
1856                 wd->num_tp--;
1857
1858                 if (wd->touch_focus_resource)
1859                         wl_input_device_send_touch_up(wd->touch_focus_resource,
1860                                                       time, touch_id);
1861                 if (wd->num_tp == 0)
1862                         touch_set_focus(wd, NULL, time);
1863                 break;
1864         }
1865 }
1866
1867 static void
1868 input_device_attach(struct wl_client *client,
1869                     struct wl_resource *resource,
1870                     uint32_t time,
1871                     struct wl_resource *buffer_resource, int32_t x, int32_t y)
1872 {
1873         struct weston_input_device *device = resource->data;
1874         struct weston_compositor *compositor = device->compositor;
1875         struct wl_buffer *buffer = NULL;
1876
1877         if (time < device->input_device.pointer_focus_time)
1878                 return;
1879         if (device->input_device.pointer_focus == NULL)
1880                 return;
1881         if (device->input_device.pointer_focus->resource.client != client)
1882                 return;
1883
1884         if (buffer_resource)
1885                 buffer = buffer_resource->data;
1886
1887         weston_surface_attach(&device->sprite->surface, buffer);
1888
1889         if (!buffer)
1890                 return;
1891
1892         if (!weston_surface_is_mapped(device->sprite)) {
1893                 wl_list_insert(&compositor->cursor_layer.surface_list,
1894                                &device->sprite->layer_link);
1895                 weston_surface_assign_output(device->sprite);
1896         }
1897
1898
1899         device->hotspot_x = x;
1900         device->hotspot_y = y;
1901         weston_surface_configure(device->sprite,
1902                                  device->input_device.x - device->hotspot_x,
1903                                  device->input_device.y - device->hotspot_y,
1904                                  buffer->width, buffer->height);
1905
1906         surface_damage(NULL, &device->sprite->surface.resource,
1907                        0, 0, buffer->width, buffer->height);
1908 }
1909
1910 static const struct wl_input_device_interface input_device_interface = {
1911         input_device_attach,
1912 };
1913
1914 static void
1915 handle_drag_surface_destroy(struct wl_listener *listener,
1916                             struct wl_resource *resource, uint32_t time)
1917 {
1918         struct weston_input_device *device;
1919
1920         device = container_of(listener, struct weston_input_device,
1921                               drag_surface_destroy_listener);
1922
1923         device->drag_surface = NULL;
1924 }
1925
1926 static void unbind_input_device(struct wl_resource *resource)
1927 {
1928         wl_list_remove(&resource->link);
1929         free(resource);
1930 }
1931
1932 static void
1933 bind_input_device(struct wl_client *client,
1934                   void *data, uint32_t version, uint32_t id)
1935 {
1936         struct wl_input_device *device = data;
1937         struct wl_resource *resource;
1938
1939         resource = wl_client_add_object(client, &wl_input_device_interface,
1940                                         &input_device_interface, id, data);
1941         wl_list_insert(&device->resource_list, &resource->link);
1942         resource->destroy = unbind_input_device;
1943 }
1944
1945 static void
1946 device_handle_new_drag_icon(struct wl_listener *listener,
1947                             struct wl_resource *resource, uint32_t time)
1948 {
1949         struct weston_input_device *device;
1950
1951         device = container_of(listener, struct weston_input_device,
1952                               new_drag_icon_listener);
1953
1954         weston_input_update_drag_surface(&device->input_device, 0, 0);
1955 }
1956
1957 WL_EXPORT void
1958 weston_input_device_init(struct weston_input_device *device,
1959                          struct weston_compositor *ec)
1960 {
1961         wl_input_device_init(&device->input_device);
1962
1963         wl_display_add_global(ec->wl_display, &wl_input_device_interface,
1964                               device, bind_input_device);
1965
1966         device->sprite = weston_surface_create(ec);
1967         device->sprite->surface.resource.data = device->sprite;
1968
1969         device->compositor = ec;
1970         device->hotspot_x = 16;
1971         device->hotspot_y = 16;
1972         device->modifier_state = 0;
1973         device->num_tp = 0;
1974
1975         device->drag_surface_destroy_listener.func = handle_drag_surface_destroy;
1976
1977         wl_list_insert(ec->input_device_list.prev, &device->link);
1978
1979         device->new_drag_icon_listener.func = device_handle_new_drag_icon;
1980         wl_list_insert(device->input_device.drag_icon_listener_list.prev,
1981                        &device->new_drag_icon_listener.link);
1982 }
1983
1984 WL_EXPORT void
1985 weston_input_device_release(struct weston_input_device *device)
1986 {
1987         wl_list_remove(&device->link);
1988         /* The global object is destroyed at wl_display_destroy() time. */
1989
1990         if (device->sprite)
1991                 destroy_surface(&device->sprite->surface.resource);
1992
1993         wl_input_device_release(&device->input_device);
1994 }
1995
1996 static void
1997 drag_surface_configure(struct weston_surface *es, int32_t sx, int32_t sy)
1998 {
1999         weston_surface_configure(es,
2000                                  es->geometry.x + sx, es->geometry.y + sy,
2001                                  es->buffer->width, es->buffer->height);
2002 }
2003
2004 static int
2005 device_setup_new_drag_surface(struct weston_input_device *device,
2006                               struct weston_surface *surface)
2007 {
2008         struct wl_input_device *input_device = &device->input_device;
2009
2010         if (surface->configure) {
2011                 wl_resource_post_error(&surface->surface.resource,
2012                                        WL_DISPLAY_ERROR_INVALID_OBJECT,
2013                                        "surface->configure already set");
2014                 return 0;
2015         }
2016
2017         device->drag_surface = surface;
2018
2019         weston_surface_set_position(device->drag_surface,
2020                                     input_device->x, input_device->y);
2021
2022         surface->configure = drag_surface_configure;
2023
2024         wl_list_insert(surface->surface.resource.destroy_listener_list.prev,
2025                        &device->drag_surface_destroy_listener.link);
2026
2027         return 1;
2028 }
2029
2030 static void
2031 device_release_drag_surface(struct weston_input_device *device)
2032 {
2033         device->drag_surface->configure = NULL;
2034         undef_region(&device->drag_surface->input);
2035         wl_list_remove(&device->drag_surface_destroy_listener.link);
2036         device->drag_surface = NULL;
2037 }
2038
2039 static void
2040 device_map_drag_surface(struct weston_input_device *device)
2041 {
2042         if (weston_surface_is_mapped(device->drag_surface) ||
2043             !device->drag_surface->buffer)
2044                 return;
2045
2046         wl_list_insert(&device->sprite->layer_link,
2047                        &device->drag_surface->layer_link);
2048         weston_surface_assign_output(device->drag_surface);
2049         empty_region(&device->drag_surface->input);
2050 }
2051
2052 static  void
2053 weston_input_update_drag_surface(struct wl_input_device *input_device,
2054                                  int dx, int dy)
2055 {
2056         int surface_changed = 0;
2057         struct weston_input_device *device = (struct weston_input_device *)
2058                 input_device;
2059
2060         if (!device->drag_surface && !input_device->drag_surface)
2061                 return;
2062
2063         if (device->drag_surface && input_device->drag_surface &&
2064             (&device->drag_surface->surface.resource !=
2065              &input_device->drag_surface->resource))
2066                 /* between calls to this funcion we got a new drag_surface */
2067                 surface_changed = 1;
2068
2069         if (!input_device->drag_surface || surface_changed) {
2070                 device_release_drag_surface(device);
2071                 if (!surface_changed)
2072                         return;
2073         }
2074
2075         if (!device->drag_surface || surface_changed) {
2076                 struct weston_surface *surface = (struct weston_surface *)
2077                         input_device->drag_surface;
2078                 if (!device_setup_new_drag_surface(device, surface))
2079                         return;
2080         }
2081
2082         /* the client may not have attached a buffer to the drag surface
2083          * when we setup it up, so check if map is needed on every update */
2084         device_map_drag_surface(device);
2085
2086         /* the client may have attached a buffer with a different size to
2087          * the drag surface, causing the input region to be reset */
2088         if (region_is_undefined(&device->drag_surface->input))
2089                 empty_region(&device->drag_surface->input);
2090
2091         if (!dx && !dy)
2092                 return;
2093
2094         weston_surface_set_position(device->drag_surface,
2095                                     device->drag_surface->geometry.x + dx,
2096                                     device->drag_surface->geometry.y + dy);
2097 }
2098
2099 WL_EXPORT void
2100 weston_compositor_update_drag_surfaces(struct weston_compositor *compositor)
2101 {
2102         weston_input_update_drag_surface(compositor->input_device, 0, 0);
2103 }
2104
2105 static void
2106 bind_output(struct wl_client *client,
2107             void *data, uint32_t version, uint32_t id)
2108 {
2109         struct weston_output *output = data;
2110         struct weston_mode *mode;
2111         struct wl_resource *resource;
2112
2113         resource = wl_client_add_object(client,
2114                                         &wl_output_interface, NULL, id, data);
2115
2116         wl_output_send_geometry(resource,
2117                                 output->x,
2118                                 output->y,
2119                                 output->mm_width,
2120                                 output->mm_height,
2121                                 output->subpixel,
2122                                 output->make, output->model);
2123
2124         wl_list_for_each (mode, &output->mode_list, link) {
2125                 wl_output_send_mode(resource,
2126                                     mode->flags,
2127                                     mode->width,
2128                                     mode->height,
2129                                     mode->refresh);
2130         }
2131 }
2132
2133 static const char vertex_shader[] =
2134         "uniform mat4 proj;\n"
2135         "attribute vec2 position;\n"
2136         "attribute vec2 texcoord;\n"
2137         "varying vec2 v_texcoord;\n"
2138         "void main()\n"
2139         "{\n"
2140         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
2141         "   v_texcoord = texcoord;\n"
2142         "}\n";
2143
2144 static const char texture_fragment_shader[] =
2145         "precision mediump float;\n"
2146         "varying vec2 v_texcoord;\n"
2147         "uniform sampler2D tex;\n"
2148         "uniform float alpha;\n"
2149         "uniform float texwidth;\n"
2150         "void main()\n"
2151         "{\n"
2152         "   if (v_texcoord.x < 0.0 || v_texcoord.x > texwidth ||\n"
2153         "       v_texcoord.y < 0.0 || v_texcoord.y > 1.0)\n"
2154         "      discard;\n"
2155         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
2156         "   gl_FragColor = alpha * gl_FragColor;\n"
2157         "}\n";
2158
2159 static const char solid_fragment_shader[] =
2160         "precision mediump float;\n"
2161         "uniform vec4 color;\n"
2162         "uniform float alpha;\n"
2163         "void main()\n"
2164         "{\n"
2165         "   gl_FragColor = alpha * color\n;"
2166         "}\n";
2167
2168 static int
2169 compile_shader(GLenum type, const char *source)
2170 {
2171         GLuint s;
2172         char msg[512];
2173         GLint status;
2174
2175         s = glCreateShader(type);
2176         glShaderSource(s, 1, &source, NULL);
2177         glCompileShader(s);
2178         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
2179         if (!status) {
2180                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
2181                 fprintf(stderr, "shader info: %s\n", msg);
2182                 return GL_NONE;
2183         }
2184
2185         return s;
2186 }
2187
2188 static int
2189 weston_shader_init(struct weston_shader *shader,
2190                    const char *vertex_source, const char *fragment_source)
2191 {
2192         char msg[512];
2193         GLint status;
2194
2195         shader->vertex_shader =
2196                 compile_shader(GL_VERTEX_SHADER, vertex_source);
2197         shader->fragment_shader =
2198                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
2199
2200         shader->program = glCreateProgram();
2201         glAttachShader(shader->program, shader->vertex_shader);
2202         glAttachShader(shader->program, shader->fragment_shader);
2203         glBindAttribLocation(shader->program, 0, "position");
2204         glBindAttribLocation(shader->program, 1, "texcoord");
2205
2206         glLinkProgram(shader->program);
2207         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
2208         if (!status) {
2209                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
2210                 fprintf(stderr, "link info: %s\n", msg);
2211                 return -1;
2212         }
2213
2214         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
2215         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
2216         shader->alpha_uniform = glGetUniformLocation(shader->program, "alpha");
2217         shader->color_uniform = glGetUniformLocation(shader->program, "color");
2218         shader->texwidth_uniform = glGetUniformLocation(shader->program,
2219                                                         "texwidth");
2220
2221         return 0;
2222 }
2223
2224 WL_EXPORT void
2225 weston_output_destroy(struct weston_output *output)
2226 {
2227         struct weston_compositor *c = output->compositor;
2228
2229         pixman_region32_fini(&output->region);
2230         pixman_region32_fini(&output->previous_damage);
2231
2232         wl_display_remove_global(c->wl_display, output->global);
2233 }
2234
2235 WL_EXPORT void
2236 weston_output_update_zoom(struct weston_output *output, int x, int y)
2237 {
2238         float ratio;
2239
2240         if (output->zoom.level <= 0)
2241                 return;
2242
2243         output->zoom.magnification = 1 / output->zoom.level;
2244         ratio = 1 - (1 / output->zoom.magnification);
2245
2246         output->zoom.trans_x = (((float)(x - output->x) / output->current->width) * (ratio * 2)) - ratio;
2247         output->zoom.trans_y = (((float)(y - output->y) / output->current->height) * (ratio * 2)) - ratio;
2248
2249         output->dirty = 1;
2250         weston_output_damage(output);
2251 }
2252
2253 WL_EXPORT void
2254 weston_output_update_matrix(struct weston_output *output)
2255 {
2256         int flip;
2257         struct weston_matrix camera;
2258         struct weston_matrix modelview;
2259
2260         weston_matrix_init(&output->matrix);
2261         weston_matrix_translate(&output->matrix,
2262                                 -(output->x + (output->border.right + output->current->width - output->border.left) / 2.0),
2263                                 -(output->y + (output->border.bottom + output->current->height - output->border.top) / 2.0), 0);
2264
2265         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
2266         weston_matrix_scale(&output->matrix,
2267                             2.0 / (output->current->width + output->border.left + output->border.right),
2268                             flip * 2.0 / (output->current->height + output->border.top + output->border.bottom), 1);
2269         if (output->zoom.active) {
2270                 weston_matrix_init(&camera);
2271                 weston_matrix_init(&modelview);
2272                 weston_matrix_translate(&camera, output->zoom.trans_x, flip * output->zoom.trans_y, 0);
2273                 weston_matrix_invert(&modelview, &camera);
2274                 weston_matrix_scale(&modelview, output->zoom.magnification, output->zoom.magnification, 1.0);
2275                 weston_matrix_multiply(&output->matrix, &modelview);
2276         }
2277
2278         output->dirty = 0;
2279 }
2280
2281 WL_EXPORT void
2282 weston_output_move(struct weston_output *output, int x, int y)
2283 {
2284         output->x = x;
2285         output->y = y;
2286
2287         pixman_region32_init(&output->previous_damage);
2288         pixman_region32_init_rect(&output->region, x, y,
2289                                   output->current->width,
2290                                   output->current->height);
2291 }
2292
2293 WL_EXPORT void
2294 weston_output_init(struct weston_output *output, struct weston_compositor *c,
2295                    int x, int y, int width, int height, uint32_t flags)
2296 {
2297         output->compositor = c;
2298         output->x = x;
2299         output->y = y;
2300         output->border.top = 0;
2301         output->border.bottom = 0;
2302         output->border.left = 0;
2303         output->border.right = 0;
2304         output->mm_width = width;
2305         output->mm_height = height;
2306         output->dirty = 1;
2307
2308         output->zoom.active = 0;
2309         output->zoom.increment = 0.05;
2310         output->zoom.level = 1.0;
2311         output->zoom.magnification = 1.0;
2312         output->zoom.trans_x = 0.0;
2313         output->zoom.trans_y = 0.0;
2314
2315         output->flags = flags;
2316         weston_output_move(output, x, y);
2317         weston_output_damage(output);
2318
2319         wl_list_init(&output->frame_callback_list);
2320
2321         output->global =
2322                 wl_display_add_global(c->wl_display, &wl_output_interface,
2323                                       output, bind_output);
2324 }
2325
2326 static void
2327 compositor_bind(struct wl_client *client,
2328                 void *data, uint32_t version, uint32_t id)
2329 {
2330         struct weston_compositor *compositor = data;
2331
2332         wl_client_add_object(client, &wl_compositor_interface,
2333                              &compositor_interface, id, compositor);
2334 }
2335
2336 WL_EXPORT int
2337 weston_compositor_init(struct weston_compositor *ec, struct wl_display *display)
2338 {
2339         struct wl_event_loop *loop;
2340         const char *extensions;
2341
2342         ec->wl_display = display;
2343         ec->launcher_sock = weston_environment_get_fd("WESTON_LAUNCHER_SOCK");
2344
2345         if (!wl_display_add_global(display, &wl_compositor_interface,
2346                                    ec, compositor_bind))
2347                 return -1;
2348
2349         wl_display_init_shm(display);
2350
2351         ec->image_target_texture_2d =
2352                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
2353         ec->image_target_renderbuffer_storage = (void *)
2354                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
2355         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
2356         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
2357         ec->bind_display =
2358                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
2359         ec->unbind_display =
2360                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
2361
2362         extensions = (const char *) glGetString(GL_EXTENSIONS);
2363         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
2364                 fprintf(stderr,
2365                         "GL_EXT_texture_format_BGRA8888 not available\n");
2366                 return -1;
2367         }
2368
2369         if (!strstr(extensions, "GL_EXT_read_format_bgra")) {
2370                 fprintf(stderr, "GL_EXT_read_format_bgra not available\n");
2371                 return -1;
2372         }
2373
2374         if (!strstr(extensions, "GL_EXT_unpack_subimage")) {
2375                 fprintf(stderr, "GL_EXT_unpack_subimage not available\n");
2376                 return -1;
2377         }
2378
2379         extensions =
2380                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
2381         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
2382                 ec->has_bind_display = 1;
2383         if (ec->has_bind_display)
2384                 ec->bind_display(ec->display, ec->wl_display);
2385
2386         wl_list_init(&ec->surface_list);
2387         wl_list_init(&ec->layer_list);
2388         wl_list_init(&ec->input_device_list);
2389         wl_list_init(&ec->output_list);
2390         wl_list_init(&ec->binding_list);
2391         wl_list_init(&ec->animation_list);
2392         weston_spring_init(&ec->fade.spring, 30.0, 1.0, 1.0);
2393         ec->fade.animation.frame = fade_frame;
2394         wl_list_init(&ec->fade.animation.link);
2395
2396         weston_layer_init(&ec->fade_layer, &ec->layer_list);
2397         weston_layer_init(&ec->cursor_layer, &ec->fade_layer.link);
2398
2399         ec->screenshooter = screenshooter_create(ec);
2400
2401         wl_data_device_manager_init(ec->wl_display);
2402
2403         glActiveTexture(GL_TEXTURE0);
2404
2405         if (weston_shader_init(&ec->texture_shader,
2406                              vertex_shader, texture_fragment_shader) < 0)
2407                 return -1;
2408         if (weston_shader_init(&ec->solid_shader,
2409                              vertex_shader, solid_fragment_shader) < 0)
2410                 return -1;
2411
2412         loop = wl_display_get_event_loop(ec->wl_display);
2413         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
2414         wl_event_source_timer_update(ec->idle_source, ec->idle_time * 1000);
2415
2416         ec->input_loop = wl_event_loop_create();
2417
2418         weston_compositor_schedule_repaint(ec);
2419
2420         return 0;
2421 }
2422
2423 WL_EXPORT void
2424 weston_compositor_shutdown(struct weston_compositor *ec)
2425 {
2426         struct weston_output *output, *next;
2427
2428         wl_event_source_remove(ec->idle_source);
2429         if (ec->input_loop_source)
2430                 wl_event_source_remove(ec->input_loop_source);
2431
2432         if (ec->screenshooter)
2433                 screenshooter_destroy(ec->screenshooter);
2434
2435         /* Destroy all outputs associated with this compositor */
2436         wl_list_for_each_safe(output, next, &ec->output_list, link)
2437                 output->destroy(output);
2438
2439         weston_binding_list_destroy_all(&ec->binding_list);
2440
2441         wl_array_release(&ec->vertices);
2442         wl_array_release(&ec->indices);
2443
2444         wl_event_loop_destroy(ec->input_loop);
2445 }
2446
2447 static int on_term_signal(int signal_number, void *data)
2448 {
2449         struct wl_display *display = data;
2450
2451         fprintf(stderr, "caught signal %d\n", signal_number);
2452         wl_display_terminate(display);
2453
2454         return 1;
2455 }
2456
2457 static void
2458 on_segv_signal(int s, siginfo_t *siginfo, void *context)
2459 {
2460         void *buffer[32];
2461         int i, count;
2462         Dl_info info;
2463
2464         fprintf(stderr, "caught segv\n");
2465
2466         count = backtrace(buffer, ARRAY_LENGTH(buffer));
2467         for (i = 0; i < count; i++) {
2468                 dladdr(buffer[i], &info);
2469                 fprintf(stderr, "  [%016lx]  %s  (%s)\n",
2470                         (long) buffer[i],
2471                         info.dli_sname ? info.dli_sname : "--",
2472                         info.dli_fname);
2473         }
2474
2475         longjmp(segv_jmp_buf, 1);
2476 }
2477
2478
2479 static void *
2480 load_module(const char *name, const char *entrypoint, void **handle)
2481 {
2482         char path[PATH_MAX];
2483         void *module, *init;
2484
2485         if (name[0] != '/')
2486                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
2487         else
2488                 snprintf(path, sizeof path, "%s", name);
2489
2490         module = dlopen(path, RTLD_LAZY);
2491         if (!module) {
2492                 fprintf(stderr,
2493                         "failed to load module: %s\n", dlerror());
2494                 return NULL;
2495         }
2496
2497         init = dlsym(module, entrypoint);
2498         if (!init) {
2499                 fprintf(stderr,
2500                         "failed to lookup init function: %s\n", dlerror());
2501                 return NULL;
2502         }
2503
2504         return init;
2505 }
2506
2507 int main(int argc, char *argv[])
2508 {
2509         struct wl_display *display;
2510         struct weston_compositor *ec;
2511         struct wl_event_source *signals[4];
2512         struct wl_event_loop *loop;
2513         struct sigaction segv_action;
2514         void *shell_module, *backend_module;
2515         int (*shell_init)(struct weston_compositor *ec);
2516         struct weston_compositor
2517                 *(*backend_init)(struct wl_display *display,
2518                                  int argc, char *argv[]);
2519         int i;
2520         char *backend = NULL;
2521         char *shell = NULL;
2522         int32_t idle_time = 300;
2523         int32_t xserver;
2524         char *socket_name = NULL;
2525         char *config_file;
2526
2527         const struct config_key shell_config_keys[] = {
2528                 { "type", CONFIG_KEY_STRING, &shell },
2529         };
2530
2531         const struct config_section cs[] = {
2532                 { "shell",
2533                   shell_config_keys, ARRAY_LENGTH(shell_config_keys) },
2534         };
2535
2536         const struct weston_option core_options[] = {
2537                 { WESTON_OPTION_STRING, "backend", 'B', &backend },
2538                 { WESTON_OPTION_STRING, "socket", 'S', &socket_name },
2539                 { WESTON_OPTION_INTEGER, "idle-time", 'i', &idle_time },
2540                 { WESTON_OPTION_BOOLEAN, "xserver", 0, &xserver },
2541         };
2542
2543         argc = parse_options(core_options,
2544                              ARRAY_LENGTH(core_options), argc, argv);
2545
2546         display = wl_display_create();
2547
2548         loop = wl_display_get_event_loop(display);
2549         signals[0] = wl_event_loop_add_signal(loop, SIGTERM, on_term_signal,
2550                                               display);
2551         signals[1] = wl_event_loop_add_signal(loop, SIGINT, on_term_signal,
2552                                               display);
2553         signals[2] = wl_event_loop_add_signal(loop, SIGQUIT, on_term_signal,
2554                                               display);
2555
2556         wl_list_init(&child_process_list);
2557         signals[3] = wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler,
2558                                               NULL);
2559
2560         segv_action.sa_flags = SA_SIGINFO | SA_RESETHAND;
2561         segv_action.sa_sigaction = on_segv_signal;
2562         sigemptyset(&segv_action.sa_mask);
2563         sigaction(SIGSEGV, &segv_action, NULL);
2564
2565         if (!backend) {
2566                 if (getenv("WAYLAND_DISPLAY"))
2567                         backend = "wayland-backend.so";
2568                 else if (getenv("DISPLAY"))
2569                         backend = "x11-backend.so";
2570                 else if (getenv("OPENWFD"))
2571                         backend = "openwfd-backend.so";
2572                 else
2573                         backend = "drm-backend.so";
2574         }
2575
2576         config_file = config_file_path("weston.ini");
2577         parse_config_file(config_file, cs, ARRAY_LENGTH(cs), shell);
2578         free(config_file);
2579
2580         if (!shell)
2581                 shell = "desktop-shell.so";
2582
2583         backend_init = load_module(backend, "backend_init", &backend_module);
2584         if (!backend_init)
2585                 exit(EXIT_FAILURE);
2586
2587         shell_init = load_module(shell, "shell_init", &shell_module);
2588         if (!shell_init)
2589                 exit(EXIT_FAILURE);
2590
2591         ec = backend_init(display, argc, argv);
2592         if (ec == NULL) {
2593                 fprintf(stderr, "failed to create compositor\n");
2594                 exit(EXIT_FAILURE);
2595         }
2596
2597         for (i = 1; argv[i]; i++)
2598                 fprintf(stderr, "unhandled option: %s\n", argv[i]);
2599         if (argv[1])
2600                 exit(EXIT_FAILURE);
2601
2602         ec->option_idle_time = idle_time;
2603         ec->idle_time = idle_time;
2604
2605 #ifdef BUILD_XSERVER_LAUNCHER
2606         if (xserver)
2607                 weston_xserver_init(ec);
2608 #endif
2609
2610         if (shell_init(ec) < 0)
2611                 exit(EXIT_FAILURE);
2612
2613         if (wl_display_add_socket(display, socket_name)) {
2614                 fprintf(stderr, "failed to add socket: %m\n");
2615                 exit(EXIT_FAILURE);
2616         }
2617
2618         weston_compositor_dpms_on(ec);
2619         weston_compositor_wake(ec);
2620         if (setjmp(segv_jmp_buf) == 0)
2621                 wl_display_run(display);
2622
2623         /* prevent further rendering while shutting down */
2624         ec->state = WESTON_COMPOSITOR_SLEEPING;
2625
2626 #ifdef BUILD_XSERVER_LAUNCHER
2627         if (xserver)
2628                 weston_xserver_destroy(ec);
2629 #endif
2630
2631         ec->shell->destroy(ec->shell);
2632
2633         if (ec->has_bind_display)
2634                 ec->unbind_display(ec->display, display);
2635
2636         for (i = ARRAY_LENGTH(signals); i;)
2637                 wl_event_source_remove(signals[--i]);
2638
2639         ec->destroy(ec);
2640         wl_display_destroy(display);
2641
2642         return 0;
2643 }