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 int
  83 weston_output_switch_mode(struct weston_output *output, struct weston_mode *mode)
  84 {
  85         if (!output->switch_mode)
  86                 return -1;
  87
  88         return output->switch_mode(output, mode);
  89 }
  90
  91 WL_EXPORT void
  92 weston_watch_process(struct weston_process *process)
  93 {
  94         wl_list_insert(&child_process_list, &process->link);
  95 }
  96
  97 static void
  98 child_client_exec(int sockfd, const char *path)
  99 {
 100         int clientfd;
 101         char s[32];
 102         sigset_t allsigs;
 103
 104         /* do not give our signal mask to the new process */
 105         sigfillset(&allsigs);
 106         sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
 107
 108         /* Launch clients as the user. */
 109         seteuid(getuid());
 110
 111         /* SOCK_CLOEXEC closes both ends, so we dup the fd to get a
 112          * non-CLOEXEC fd to pass through exec. */
 113         clientfd = dup(sockfd);
 114         if (clientfd == -1) {
 115                 fprintf(stderr, "compositor: dup failed: %m\n");
 116                 return;
 117         }
 118
 119         snprintf(s, sizeof s, "%d", clientfd);
 120         setenv("WAYLAND_SOCKET", s, 1);
 121
 122         if (execl(path, path, NULL) < 0)
 123                 fprintf(stderr, "compositor: executing '%s' failed: %m\n",
 124                         path);
 125 }
 126
 127 WL_EXPORT struct wl_client *
 128 weston_client_launch(struct weston_compositor *compositor,
 129                      struct weston_process *proc,
 130                      const char *path,
 131                      weston_process_cleanup_func_t cleanup)
 132 {
 133         int sv[2];
 134         pid_t pid;
 135         struct wl_client *client;
 136
 137         if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
 138                 fprintf(stderr, "weston_client_launch: "
 139                         "socketpair failed while launching '%s': %m\n",
 140                         path);
 141                 return NULL;
 142         }
 143
 144         pid = fork();
 145         if (pid == -1) {
 146                 close(sv[0]);
 147                 close(sv[1]);
 148                 fprintf(stderr,  "weston_client_launch: "
 149                         "fork failed while launching '%s': %m\n", path);
 150                 return NULL;
 151         }
 152
 153         if (pid == 0) {
 154                 child_client_exec(sv[1], path);
 155                 exit(-1);
 156         }
 157
 158         close(sv[1]);
 159
 160         client = wl_client_create(compositor->wl_display, sv[0]);
 161         if (!client) {
 162                 close(sv[0]);
 163                 fprintf(stderr, "weston_client_launch: "
 164                         "wl_client_create failed while launching '%s'.\n",
 165                         path);
 166                 return NULL;
 167         }
 168
 169         proc->pid = pid;
 170         proc->cleanup = cleanup;
 171         weston_watch_process(proc);
 172
 173         return client;
 174 }
 175
 176 static void
 177 surface_handle_buffer_destroy(struct wl_listener *listener, void *data)
 178 {
 179         struct weston_surface *es =
 180                 container_of(listener, struct weston_surface,
 181                              buffer_destroy_listener);
 182
 183         es->buffer = NULL;
 184 }
 185
 186 static const pixman_region32_data_t undef_region_data;
 187
 188 static void
 189 undef_region(pixman_region32_t *region)
 190 {
 191         pixman_region32_fini(region);
 192         region->data = (pixman_region32_data_t *) &undef_region_data;
 193 }
 194
 195 static int
 196 region_is_undefined(pixman_region32_t *region)
 197 {
 198         return region->data == &undef_region_data;
 199 }
 200
 201 static void
 202 empty_region(pixman_region32_t *region)
 203 {
 204         if (!region_is_undefined(region))
 205                 pixman_region32_fini(region);
 206
 207         pixman_region32_init(region);
 208 }
 209
 210 WL_EXPORT struct weston_surface *
 211 weston_surface_create(struct weston_compositor *compositor)
 212 {
 213         struct weston_surface *surface;
 214
 215         surface = calloc(1, sizeof *surface);
 216         if (surface == NULL)
 217                 return NULL;
 218
 219         wl_signal_init(&surface->surface.resource.destroy_signal);
 220
 221         wl_list_init(&surface->link);
 222         wl_list_init(&surface->layer_link);
 223
 224         surface->surface.resource.client = NULL;
 225
 226         surface->compositor = compositor;
 227         surface->image = EGL_NO_IMAGE_KHR;
 228         surface->alpha = 255;
 229         surface->brightness = 255;
 230         surface->saturation = 255;
 231         surface->pitch = 1;
 232
 233         surface->buffer = NULL;
 234         surface->output = NULL;
 235
 236         pixman_region32_init(&surface->damage);
 237         pixman_region32_init(&surface->opaque);
 238         pixman_region32_init(&surface->clip);
 239         undef_region(&surface->input);
 240         pixman_region32_init(&surface->transform.opaque);
 241         wl_list_init(&surface->frame_callback_list);
 242
 243         surface->buffer_destroy_listener.notify =
 244                 surface_handle_buffer_destroy;
 245
 246         wl_list_init(&surface->geometry.transformation_list);
 247         wl_list_insert(&surface->geometry.transformation_list,
 248                        &surface->transform.position.link);
 249         weston_matrix_init(&surface->transform.position.matrix);
 250         pixman_region32_init(&surface->transform.boundingbox);
 251         surface->geometry.dirty = 1;
 252
 253         return surface;
 254 }
 255
 256 WL_EXPORT void
 257 weston_surface_set_color(struct weston_surface *surface,
 258                  GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
 259 {
 260         surface->color[0] = red;
 261         surface->color[1] = green;
 262         surface->color[2] = blue;
 263         surface->color[3] = alpha;
 264         surface->shader = &surface->compositor->solid_shader;
 265 }
 266
 267 static void
 268 surface_to_global_float(struct weston_surface *surface,
 269                         int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
 270 {
 271         if (surface->transform.enabled) {
 272                 struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
 273
 274                 weston_matrix_transform(&surface->transform.matrix, &v);
 275
 276                 if (fabsf(v.f[3]) < 1e-6) {
 277                         fprintf(stderr, "warning: numerical instability in "
 278                                 "weston_surface_to_global(), divisor = %g\n",
 279                                 v.f[3]);
 280                         *x = 0;
 281                         *y = 0;
 282                         return;
 283                 }
 284
 285                 *x = v.f[0] / v.f[3];
 286                 *y = v.f[1] / v.f[3];
 287         } else {
 288                 *x = sx + surface->geometry.x;
 289                 *y = sy + surface->geometry.y;
 290         }
 291 }
 292
 293 WL_EXPORT void
 294 weston_surface_damage_below(struct weston_surface *surface)
 295 {
 296         struct weston_compositor *compositor = surface->compositor;
 297         pixman_region32_t damage;
 298
 299         pixman_region32_init(&damage);
 300         pixman_region32_subtract(&damage, &surface->transform.boundingbox,
 301                                  &surface->clip);
 302         pixman_region32_union(&compositor->damage,
 303                               &compositor->damage, &damage);
 304         pixman_region32_fini(&damage);
 305 }
 306
 307 static void
 308 surface_compute_bbox(struct weston_surface *surface, int32_t sx, int32_t sy,
 309                      int32_t width, int32_t height,
 310                      pixman_region32_t *bbox)
 311 {
 312         GLfloat min_x = HUGE_VALF,  min_y = HUGE_VALF;
 313         GLfloat max_x = -HUGE_VALF, max_y = -HUGE_VALF;
 314         int32_t s[4][2] = {
 315                 { sx,         sy },
 316                 { sx,         sy + height },
 317                 { sx + width, sy },
 318                 { sx + width, sy + height }
 319         };
 320         GLfloat int_x, int_y;
 321         int i;
 322
 323         for (i = 0; i < 4; ++i) {
 324                 GLfloat x, y;
 325                 surface_to_global_float(surface, s[i][0], s[i][1], &x, &y);
 326                 if (x < min_x)
 327                         min_x = x;
 328                 if (x > max_x)
 329                         max_x = x;
 330                 if (y < min_y)
 331                         min_y = y;
 332                 if (y > max_y)
 333                         max_y = y;
 334         }
 335
 336         int_x = floorf(min_x);
 337         int_y = floorf(min_y);
 338         pixman_region32_init_rect(bbox, int_x, int_y,
 339                                   ceilf(max_x) - int_x, ceilf(max_y) - int_y);
 340 }
 341
 342 static void
 343 weston_surface_update_transform_disable(struct weston_surface *surface)
 344 {
 345         surface->transform.enabled = 0;
 346
 347         /* round off fractions when not transformed */
 348         surface->geometry.x = roundf(surface->geometry.x);
 349         surface->geometry.y = roundf(surface->geometry.y);
 350
 351         pixman_region32_init_rect(&surface->transform.boundingbox,
 352                                   surface->geometry.x,
 353                                   surface->geometry.y,
 354                                   surface->geometry.width,
 355                                   surface->geometry.height);
 356
 357         if (surface->alpha == 255) {
 358                 pixman_region32_copy(&surface->transform.opaque,
 359                                      &surface->opaque);
 360                 pixman_region32_translate(&surface->transform.opaque,
 361                                           surface->geometry.x,
 362                                           surface->geometry.y);
 363         }
 364 }
 365
 366 static int
 367 weston_surface_update_transform_enable(struct weston_surface *surface)
 368 {
 369         struct weston_matrix *matrix = &surface->transform.matrix;
 370         struct weston_matrix *inverse = &surface->transform.inverse;
 371         struct weston_transform *tform;
 372
 373         surface->transform.enabled = 1;
 374
 375         /* Otherwise identity matrix, but with x and y translation. */
 376         surface->transform.position.matrix.d[12] = surface->geometry.x;
 377         surface->transform.position.matrix.d[13] = surface->geometry.y;
 378
 379         weston_matrix_init(matrix);
 380         wl_list_for_each(tform, &surface->geometry.transformation_list, link)
 381                 weston_matrix_multiply(matrix, &tform->matrix);
 382
 383         if (weston_matrix_invert(inverse, matrix) < 0) {
 384                 /* Oops, bad total transformation, not invertible */
 385                 fprintf(stderr, "error: weston_surface %p"
 386                         " transformation not invertible.\n", surface);
 387                 return -1;
 388         }
 389
 390         surface_compute_bbox(surface, 0, 0, surface->geometry.width,
 391                              surface->geometry.height,
 392                              &surface->transform.boundingbox);
 393
 394         return 0;
 395 }
 396
 397 WL_EXPORT void
 398 weston_surface_update_transform(struct weston_surface *surface)
 399 {
 400         if (!surface->geometry.dirty)
 401                 return;
 402
 403         surface->geometry.dirty = 0;
 404
 405         weston_surface_damage_below(surface);
 406
 407         pixman_region32_fini(&surface->transform.boundingbox);
 408         pixman_region32_fini(&surface->transform.opaque);
 409         pixman_region32_init(&surface->transform.opaque);
 410
 411         if (region_is_undefined(&surface->input))
 412                 pixman_region32_init_rect(&surface->input, 0, 0,
 413                                           surface->geometry.width,
 414                                           surface->geometry.height);
 415
 416         /* transform.position is always in transformation_list */
 417         if (surface->geometry.transformation_list.next ==
 418             &surface->transform.position.link &&
 419             surface->geometry.transformation_list.prev ==
 420             &surface->transform.position.link) {
 421                 weston_surface_update_transform_disable(surface);
 422         } else {
 423                 if (weston_surface_update_transform_enable(surface) < 0)
 424                         weston_surface_update_transform_disable(surface);
 425         }
 426
 427         /* weston_surface_damage() without update */
 428         pixman_region32_union(&surface->damage, &surface->damage,
 429                               &surface->transform.boundingbox);
 430
 431         if (weston_surface_is_mapped(surface))
 432                 weston_surface_assign_output(surface);
 433
 434         weston_compositor_schedule_repaint(surface->compositor);
 435 }
 436
 437 WL_EXPORT void
 438 weston_surface_to_global_float(struct weston_surface *surface,
 439                                int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
 440 {
 441         weston_surface_update_transform(surface);
 442
 443         surface_to_global_float(surface, sx, sy, x, y);
 444 }
 445
 446 WL_EXPORT void
 447 weston_surface_to_global(struct weston_surface *surface,
 448                          int32_t sx, int32_t sy, int32_t *x, int32_t *y)
 449 {
 450         GLfloat xf, yf;
 451
 452         weston_surface_to_global_float(surface, sx, sy, &xf, &yf);
 453         *x = floorf(xf);
 454         *y = floorf(yf);
 455 }
 456
 457 static void
 458 surface_from_global_float(struct weston_surface *surface,
 459                           int32_t x, int32_t y, GLfloat *sx, GLfloat *sy)
 460 {
 461         if (surface->transform.enabled) {
 462                 struct weston_vector v = { { x, y, 0.0f, 1.0f } };
 463
 464                 weston_matrix_transform(&surface->transform.inverse, &v);
 465
 466                 if (fabsf(v.f[3]) < 1e-6) {
 467                         fprintf(stderr, "warning: numerical instability in "
 468                                 "weston_surface_from_global(), divisor = %g\n",
 469                                 v.f[3]);
 470                         *sx = 0;
 471                         *sy = 0;
 472                         return;
 473                 }
 474
 475                 *sx = v.f[0] / v.f[3];
 476                 *sy = v.f[1] / v.f[3];
 477         } else {
 478                 *sx = x - surface->geometry.x;
 479                 *sy = y - surface->geometry.y;
 480         }
 481 }
 482
 483 WL_EXPORT void
 484 weston_surface_from_global(struct weston_surface *surface,
 485                            int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 486 {
 487         GLfloat sxf, syf;
 488
 489         weston_surface_update_transform(surface);
 490
 491         surface_from_global_float(surface, x, y, &sxf, &syf);
 492         *sx = floorf(sxf);
 493         *sy = floorf(syf);
 494 }
 495
 496 static void
 497 weston_surface_damage_rectangle(struct weston_surface *surface,
 498                                 int32_t sx, int32_t sy,
 499                                 int32_t width, int32_t height)
 500 {
 501         weston_surface_update_transform(surface);
 502
 503         if (surface->transform.enabled) {
 504                 pixman_region32_t box;
 505                 surface_compute_bbox(surface, sx, sy, width, height, &box);
 506                 pixman_region32_union(&surface->damage, &surface->damage,
 507                                       &box);
 508                 pixman_region32_fini(&box);
 509         } else {
 510                 pixman_region32_union_rect(&surface->damage, &surface->damage,
 511                                            surface->geometry.x + sx,
 512                                            surface->geometry.y + sy,
 513                                            width, height);
 514         }
 515
 516         weston_compositor_schedule_repaint(surface->compositor);
 517 }
 518
 519 WL_EXPORT void
 520 weston_surface_damage(struct weston_surface *surface)
 521 {
 522         weston_surface_update_transform(surface);
 523
 524         pixman_region32_union(&surface->damage, &surface->damage,
 525                               &surface->transform.boundingbox);
 526
 527         weston_compositor_schedule_repaint(surface->compositor);
 528 }
 529
 530 WL_EXPORT void
 531 weston_surface_configure(struct weston_surface *surface,
 532                          GLfloat x, GLfloat y, int width, int height)
 533 {
 534         surface->geometry.x = x;
 535         surface->geometry.y = y;
 536         surface->geometry.width = width;
 537         surface->geometry.height = height;
 538         surface->geometry.dirty = 1;
 539 }
 540
 541 WL_EXPORT void
 542 weston_surface_set_position(struct weston_surface *surface,
 543                             GLfloat x, GLfloat y)
 544 {
 545         surface->geometry.x = x;
 546         surface->geometry.y = y;
 547         surface->geometry.dirty = 1;
 548 }
 549
 550 WL_EXPORT int
 551 weston_surface_is_mapped(struct weston_surface *surface)
 552 {
 553         if (surface->output)
 554                 return 1;
 555         else
 556                 return 0;
 557 }
 558
 559 WL_EXPORT uint32_t
 560 weston_compositor_get_time(void)
 561 {
 562        struct timeval tv;
 563
 564        gettimeofday(&tv, NULL);
 565
 566        return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 567 }
 568
 569 static struct weston_surface *
 570 weston_compositor_pick_surface(struct weston_compositor *compositor,
 571                                int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 572 {
 573         struct weston_surface *surface;
 574
 575         wl_list_for_each(surface, &compositor->surface_list, link) {
 576                 weston_surface_from_global(surface, x, y, sx, sy);
 577                 if (pixman_region32_contains_point(&surface->input,
 578                                                    *sx, *sy, NULL))
 579                         return surface;
 580         }
 581
 582         return NULL;
 583 }
 584
 585 static void
 586 weston_device_repick(struct wl_input_device *device)
 587 {
 588         struct weston_input_device *wd = (struct weston_input_device *) device;
 589         const struct wl_pointer_grab_interface *interface;
 590         struct weston_surface *surface, *focus;
 591
 592         surface = weston_compositor_pick_surface(wd->compositor,
 593                                                  device->x, device->y,
 594                                                  &device->current_x,
 595                                                  &device->current_y);
 596
 597         if (&surface->surface != device->current) {
 598                 interface = device->pointer_grab->interface;
 599                 interface->focus(device->pointer_grab, &surface->surface,
 600                                  device->current_x, device->current_y);
 601                 device->current = &surface->surface;
 602         }
 603
 604         focus = (struct weston_surface *) device->pointer_grab->focus;
 605         if (focus)
 606                 weston_surface_from_global(focus, device->x, device->y,
 607                                            &device->pointer_grab->x, &device->pointer_grab->y);
 608 }
 609
 610 WL_EXPORT void
 611 weston_compositor_repick(struct weston_compositor *compositor)
 612 {
 613         struct weston_input_device *device;
 614
 615         if (!compositor->focus)
 616                 return;
 617
 618         wl_list_for_each(device, &compositor->input_device_list, link)
 619                 weston_device_repick(&device->input_device);
 620 }
 621
 622 static void
 623 weston_surface_unmap(struct weston_surface *surface)
 624 {
 625         struct wl_input_device *device = surface->compositor->input_device;
 626
 627         weston_surface_damage_below(surface);
 628         surface->output = NULL;
 629         wl_list_remove(&surface->link);
 630         wl_list_remove(&surface->layer_link);
 631
 632         if (device->keyboard_focus == &surface->surface)
 633                 wl_input_device_set_keyboard_focus(device, NULL);
 634         if (device->pointer_focus == &surface->surface)
 635                 wl_input_device_set_pointer_focus(device, NULL, 0, 0);
 636
 637         weston_compositor_schedule_repaint(surface->compositor);
 638 }
 639
 640 static void
 641 destroy_surface(struct wl_resource *resource)
 642 {
 643         struct weston_surface *surface =
 644                 container_of(resource,
 645                              struct weston_surface, surface.resource);
 646         struct weston_compositor *compositor = surface->compositor;
 647
 648         if (weston_surface_is_mapped(surface))
 649                 weston_surface_unmap(surface);
 650
 651         if (surface->texture)
 652                 glDeleteTextures(1, &surface->texture);
 653
 654         if (surface->buffer)
 655                 wl_list_remove(&surface->buffer_destroy_listener.link);
 656
 657         if (surface->image != EGL_NO_IMAGE_KHR)
 658                 compositor->destroy_image(compositor->display,
 659                                           surface->image);
 660
 661         pixman_region32_fini(&surface->transform.boundingbox);
 662         pixman_region32_fini(&surface->damage);
 663         pixman_region32_fini(&surface->opaque);
 664         pixman_region32_fini(&surface->clip);
 665         if (!region_is_undefined(&surface->input))
 666                 pixman_region32_fini(&surface->input);
 667
 668         free(surface);
 669 }
 670
 671 WL_EXPORT void
 672 weston_surface_destroy(struct weston_surface *surface)
 673 {
 674         /* Not a valid way to destroy a client surface */
 675         assert(surface->surface.resource.client == NULL);
 676
 677         destroy_surface(&surface->surface.resource);
 678 }
 679
 680 static void
 681 weston_surface_attach(struct wl_surface *surface, struct wl_buffer *buffer)
 682 {
 683         struct weston_surface *es = (struct weston_surface *) surface;
 684         struct weston_compositor *ec = es->compositor;
 685
 686         if (es->buffer) {
 687                 weston_buffer_post_release(es->buffer);
 688                 wl_list_remove(&es->buffer_destroy_listener.link);
 689         }
 690
 691         es->buffer = buffer;
 692
 693         if (!buffer) {
 694                 if (weston_surface_is_mapped(es))
 695                         weston_surface_unmap(es);
 696                 return;
 697         }
 698
 699         buffer->busy_count++;
 700         wl_signal_add(&es->buffer->resource.destroy_signal,
 701                       &es->buffer_destroy_listener);
 702
 703         if (es->geometry.width != buffer->width ||
 704             es->geometry.height != buffer->height) {
 705                 undef_region(&es->input);
 706                 pixman_region32_fini(&es->opaque);
 707                 pixman_region32_init(&es->opaque);
 708         }
 709
 710         if (!es->texture) {
 711                 glGenTextures(1, &es->texture);
 712                 glBindTexture(GL_TEXTURE_2D, es->texture);
 713                 glTexParameteri(GL_TEXTURE_2D,
 714                                 GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 715                 glTexParameteri(GL_TEXTURE_2D,
 716                                 GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 717                 es->shader = &ec->texture_shader;
 718         } else {
 719                 glBindTexture(GL_TEXTURE_2D, es->texture);
 720         }
 721
 722         if (wl_buffer_is_shm(buffer)) {
 723                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 724                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 725                              es->pitch, es->buffer->height, 0,
 726                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 727         } else {
 728                 if (es->image != EGL_NO_IMAGE_KHR)
 729                         ec->destroy_image(ec->display, es->image);
 730                 es->image = ec->create_image(ec->display, NULL,
 731                                              EGL_WAYLAND_BUFFER_WL,
 732                                              buffer, NULL);
 733
 734                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 735
 736                 es->pitch = buffer->width;
 737         }
 738 }
 739
 740 static int
 741 texture_region(struct weston_surface *es, pixman_region32_t *region)
 742 {
 743         struct weston_compositor *ec = es->compositor;
 744         GLfloat *v, inv_width, inv_height;
 745         GLfloat sx, sy;
 746         pixman_box32_t *rectangles;
 747         unsigned int *p;
 748         int i, n;
 749
 750         rectangles = pixman_region32_rectangles(region, &n);
 751         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 752         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 753         inv_width = 1.0 / es->pitch;
 754         inv_height = 1.0 / es->geometry.height;
 755
 756         for (i = 0; i < n; i++, v += 16, p += 6) {
 757                 surface_from_global_float(es, rectangles[i].x1,
 758                                           rectangles[i].y1, &sx, &sy);
 759                 v[ 0] = rectangles[i].x1;
 760                 v[ 1] = rectangles[i].y1;
 761                 v[ 2] = sx * inv_width;
 762                 v[ 3] = sy * inv_height;
 763
 764                 surface_from_global_float(es, rectangles[i].x1,
 765                                           rectangles[i].y2, &sx, &sy);
 766                 v[ 4] = rectangles[i].x1;
 767                 v[ 5] = rectangles[i].y2;
 768                 v[ 6] = sx * inv_width;
 769                 v[ 7] = sy * inv_height;
 770
 771                 surface_from_global_float(es, rectangles[i].x2,
 772                                           rectangles[i].y1, &sx, &sy);
 773                 v[ 8] = rectangles[i].x2;
 774                 v[ 9] = rectangles[i].y1;
 775                 v[10] = sx * inv_width;
 776                 v[11] = sy * inv_height;
 777
 778                 surface_from_global_float(es, rectangles[i].x2,
 779                                           rectangles[i].y2, &sx, &sy);
 780                 v[12] = rectangles[i].x2;
 781                 v[13] = rectangles[i].y2;
 782                 v[14] = sx * inv_width;
 783                 v[15] = sy * inv_height;
 784
 785                 p[0] = i * 4 + 0;
 786                 p[1] = i * 4 + 1;
 787                 p[2] = i * 4 + 2;
 788                 p[3] = i * 4 + 2;
 789                 p[4] = i * 4 + 1;
 790                 p[5] = i * 4 + 3;
 791         }
 792
 793         return n;
 794 }
 795
 796 WL_EXPORT void
 797 weston_surface_draw(struct weston_surface *es, struct weston_output *output,
 798                     pixman_region32_t *damage)
 799 {
 800         struct weston_compositor *ec = es->compositor;
 801         GLfloat *v;
 802         pixman_region32_t repaint;
 803         GLint filter;
 804         int n;
 805
 806         pixman_region32_init(&repaint);
 807         pixman_region32_intersect(&repaint,
 808                                   &es->transform.boundingbox, damage);
 809         pixman_region32_subtract(&repaint, &repaint, &es->clip);
 810
 811         if (!pixman_region32_not_empty(&repaint))
 812                 goto out;
 813
 814         glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 815         glEnable(GL_BLEND);
 816
 817         if (ec->current_shader != es->shader) {
 818                 glUseProgram(es->shader->program);
 819                 ec->current_shader = es->shader;
 820         }
 821
 822         glUniformMatrix4fv(es->shader->proj_uniform,
 823                            1, GL_FALSE, output->matrix.d);
 824         glUniform1i(es->shader->tex_uniform, 0);
 825         glUniform4fv(es->shader->color_uniform, 1, es->color);
 826         glUniform1f(es->shader->alpha_uniform, es->alpha / 255.0);
 827         glUniform1f(es->shader->brightness_uniform, es->brightness / 255.0);
 828         glUniform1f(es->shader->saturation_uniform, es->saturation / 255.0);
 829         glUniform1f(es->shader->texwidth_uniform,
 830                     (GLfloat)es->geometry.width / es->pitch);
 831
 832         if (es->transform.enabled || output->zoom.active)
 833                 filter = GL_LINEAR;
 834         else
 835                 filter = GL_NEAREST;
 836
 837         n = texture_region(es, &repaint);
 838
 839         glBindTexture(GL_TEXTURE_2D, es->texture);
 840         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 841         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 842
 843         v = ec->vertices.data;
 844         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 845         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 846         glEnableVertexAttribArray(0);
 847         glEnableVertexAttribArray(1);
 848
 849         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 850
 851         glDisableVertexAttribArray(1);
 852         glDisableVertexAttribArray(0);
 853
 854         ec->vertices.size = 0;
 855         ec->indices.size = 0;
 856
 857 out:
 858         pixman_region32_fini(&repaint);
 859 }
 860
 861 WL_EXPORT void
 862 weston_surface_restack(struct weston_surface *surface, struct wl_list *below)
 863 {
 864         wl_list_remove(&surface->layer_link);
 865         wl_list_insert(below, &surface->layer_link);
 866         weston_surface_damage_below(surface);
 867         weston_surface_damage(surface);
 868 }
 869
 870 WL_EXPORT void
 871 weston_compositor_damage_all(struct weston_compositor *compositor)
 872 {
 873         struct weston_output *output;
 874
 875         wl_list_for_each(output, &compositor->output_list, link)
 876                 weston_output_damage(output);
 877 }
 878
 879 WL_EXPORT void
 880 weston_buffer_post_release(struct wl_buffer *buffer)
 881 {
 882         if (--buffer->busy_count > 0)
 883                 return;
 884
 885         assert(buffer->resource.client != NULL);
 886         wl_resource_queue_event(&buffer->resource, WL_BUFFER_RELEASE);
 887 }
 888
 889 WL_EXPORT void
 890 weston_output_damage(struct weston_output *output)
 891 {
 892         struct weston_compositor *compositor = output->compositor;
 893
 894         pixman_region32_union(&compositor->damage,
 895                               &compositor->damage, &output->region);
 896         weston_compositor_schedule_repaint(compositor);
 897 }
 898
 899 static void
 900 fade_frame(struct weston_animation *animation,
 901            struct weston_output *output, uint32_t msecs)
 902 {
 903         struct weston_compositor *compositor =
 904                 container_of(animation,
 905                              struct weston_compositor, fade.animation);
 906         struct weston_surface *surface;
 907
 908         surface = compositor->fade.surface;
 909         weston_spring_update(&compositor->fade.spring, msecs);
 910         weston_surface_set_color(surface, 0.0, 0.0, 0.0,
 911                                  compositor->fade.spring.current);
 912         weston_surface_damage(surface);
 913
 914         if (weston_spring_done(&compositor->fade.spring)) {
 915                 compositor->fade.spring.current =
 916                         compositor->fade.spring.target;
 917                 wl_list_remove(&animation->link);
 918                 wl_list_init(&animation->link);
 919
 920                 if (compositor->fade.spring.current < 0.001) {
 921                         destroy_surface(&surface->surface.resource);
 922                         compositor->fade.surface = NULL;
 923                 } else if (compositor->fade.spring.current > 0.999) {
 924                         compositor->state = WESTON_COMPOSITOR_SLEEPING;
 925                         wl_signal_emit(&compositor->lock_signal, compositor);
 926                 }
 927         }
 928 }
 929
 930 struct weston_frame_callback {
 931         struct wl_resource resource;
 932         struct wl_list link;
 933 };
 934
 935 static void
 936 weston_output_repaint(struct weston_output *output, int msecs)
 937 {
 938         struct weston_compositor *ec = output->compositor;
 939         struct weston_surface *es;
 940         struct weston_layer *layer;
 941         struct weston_animation *animation, *next;
 942         struct weston_frame_callback *cb, *cnext;
 943         pixman_region32_t opaque, new_damage, output_damage;
 944         int32_t width, height;
 945
 946         weston_compositor_update_drag_surfaces(ec);
 947
 948         width = output->current->width +
 949                 output->border.left + output->border.right;
 950         height = output->current->height +
 951                 output->border.top + output->border.bottom;
 952         glViewport(0, 0, width, height);
 953
 954         /* Rebuild the surface list and update surface transforms up front. */
 955         wl_list_init(&ec->surface_list);
 956         wl_list_for_each(layer, &ec->layer_list, link) {
 957                 wl_list_for_each(es, &layer->surface_list, layer_link) {
 958                         weston_surface_update_transform(es);
 959                         wl_list_insert(ec->surface_list.prev, &es->link);
 960                 }
 961         }
 962
 963         if (output->assign_planes)
 964                 /*
 965                  * This will queue flips for the fbs and sprites where
 966                  * applicable and clear the damage for those surfaces.
 967                  * The repaint loop below will repaint everything
 968                  * else.
 969                  */
 970                 output->assign_planes(output);
 971
 972         pixman_region32_init(&new_damage);
 973         pixman_region32_init(&opaque);
 974
 975         wl_list_for_each(es, &ec->surface_list, link) {
 976                 pixman_region32_subtract(&es->damage, &es->damage, &opaque);
 977                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 978                 empty_region(&es->damage);
 979                 pixman_region32_copy(&es->clip, &opaque);
 980                 pixman_region32_union(&opaque, &opaque, &es->transform.opaque);
 981         }
 982
 983         pixman_region32_union(&ec->damage, &ec->damage, &new_damage);
 984
 985         pixman_region32_init(&output_damage);
 986         pixman_region32_union(&output_damage,
 987                               &ec->damage, &output->previous_damage);
 988         pixman_region32_copy(&output->previous_damage, &ec->damage);
 989         pixman_region32_intersect(&output_damage,
 990                                   &output_damage, &output->region);
 991         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 992
 993         pixman_region32_fini(&opaque);
 994         pixman_region32_fini(&new_damage);
 995
 996         if (output->dirty)
 997                 weston_output_update_matrix(output);
 998
 999         output->repaint(output, &output_damage);
1000
1001         pixman_region32_fini(&output_damage);
1002
1003         output->repaint_needed = 0;
1004
1005         weston_compositor_repick(ec);
1006         wl_event_loop_dispatch(ec->input_loop, 0);
1007
1008         wl_list_for_each_safe(cb, cnext, &output->frame_callback_list, link) {
1009                 wl_callback_send_done(&cb->resource, msecs);
1010                 wl_resource_destroy(&cb->resource);
1011         }
1012
1013         wl_list_for_each_safe(animation, next, &ec->animation_list, link)
1014                 animation->frame(animation, output, msecs);
1015 }
1016
1017 static int
1018 weston_compositor_read_input(int fd, uint32_t mask, void *data)
1019 {
1020         struct weston_compositor *compositor = data;
1021
1022         wl_event_loop_dispatch(compositor->input_loop, 0);
1023
1024         return 1;
1025 }
1026
1027 WL_EXPORT void
1028 weston_output_finish_frame(struct weston_output *output, int msecs)
1029 {
1030         struct weston_compositor *compositor = output->compositor;
1031         struct wl_event_loop *loop =
1032                 wl_display_get_event_loop(compositor->wl_display);
1033         int fd;
1034
1035         if (output->repaint_needed) {
1036                 weston_output_repaint(output, msecs);
1037                 return;
1038         }
1039
1040         output->repaint_scheduled = 0;
1041         if (compositor->input_loop_source)
1042                 return;
1043
1044         fd = wl_event_loop_get_fd(compositor->input_loop);
1045         compositor->input_loop_source =
1046                 wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
1047                                      weston_compositor_read_input, compositor);
1048 }
1049
1050 static void
1051 idle_repaint(void *data)
1052 {
1053         struct weston_output *output = data;
1054
1055         weston_output_finish_frame(output, weston_compositor_get_time());
1056 }
1057
1058 WL_EXPORT void
1059 weston_layer_init(struct weston_layer *layer, struct wl_list *below)
1060 {
1061         wl_list_init(&layer->surface_list);
1062         wl_list_insert(below, &layer->link);
1063 }
1064
1065 WL_EXPORT void
1066 weston_compositor_schedule_repaint(struct weston_compositor *compositor)
1067 {
1068         struct weston_output *output;
1069         struct wl_event_loop *loop;
1070
1071         if (compositor->state == WESTON_COMPOSITOR_SLEEPING)
1072                 return;
1073
1074         loop = wl_display_get_event_loop(compositor->wl_display);
1075         wl_list_for_each(output, &compositor->output_list, link) {
1076                 output->repaint_needed = 1;
1077                 if (output->repaint_scheduled)
1078                         continue;
1079
1080                 wl_event_loop_add_idle(loop, idle_repaint, output);
1081                 output->repaint_scheduled = 1;
1082         }
1083
1084         if (compositor->input_loop_source) {
1085                 wl_event_source_remove(compositor->input_loop_source);
1086                 compositor->input_loop_source = NULL;
1087         }
1088 }
1089
1090 WL_EXPORT void
1091 weston_compositor_fade(struct weston_compositor *compositor, float tint)
1092 {
1093         struct weston_surface *surface;
1094         int done;
1095
1096         done = weston_spring_done(&compositor->fade.spring);
1097         compositor->fade.spring.target = tint;
1098         if (weston_spring_done(&compositor->fade.spring))
1099                 return;
1100
1101         if (done)
1102                 compositor->fade.spring.timestamp =
1103                         weston_compositor_get_time();
1104
1105         if (compositor->fade.surface == NULL) {
1106                 surface = weston_surface_create(compositor);
1107                 weston_surface_configure(surface, 0, 0, 8192, 8192);
1108                 weston_surface_set_color(surface, 0.0, 0.0, 0.0, 0.0);
1109                 wl_list_insert(&compositor->fade_layer.surface_list,
1110                                &surface->layer_link);
1111                 weston_surface_assign_output(surface);
1112                 compositor->fade.surface = surface;
1113                 pixman_region32_init(&surface->input);
1114         }
1115
1116         weston_surface_damage(compositor->fade.surface);
1117         if (wl_list_empty(&compositor->fade.animation.link))
1118                 wl_list_insert(compositor->animation_list.prev,
1119                                &compositor->fade.animation.link);
1120 }
1121
1122 static void
1123 surface_destroy(struct wl_client *client, struct wl_resource *resource)
1124 {
1125         wl_resource_destroy(resource);
1126 }
1127
1128 static struct wl_resource *
1129 find_resource_for_client(struct wl_list *list, struct wl_client *client)
1130 {
1131         struct wl_resource *r;
1132
1133         wl_list_for_each(r, list, link) {
1134                 if (r->client == client)
1135                         return r;
1136         }
1137
1138         return NULL;
1139 }
1140
1141 WL_EXPORT void
1142 weston_surface_assign_output(struct weston_surface *es)
1143 {
1144         struct weston_compositor *ec = es->compositor;
1145         struct weston_output *output, *new_output;
1146         pixman_region32_t region;
1147         uint32_t max, area;
1148         pixman_box32_t *e;
1149
1150         weston_surface_update_transform(es);
1151
1152         new_output = NULL;
1153         max = 0;
1154         pixman_region32_init(&region);
1155         wl_list_for_each(output, &ec->output_list, link) {
1156                 pixman_region32_intersect(&region, &es->transform.boundingbox,
1157                                           &output->region);
1158
1159                 e = pixman_region32_extents(&region);
1160                 area = (e->x2 - e->x1) * (e->y2 - e->y1);
1161
1162                 if (area >= max) {
1163                         new_output = output;
1164                         max = area;
1165                 }
1166         }
1167         pixman_region32_fini(&region);
1168
1169         es->output = new_output;
1170         if (!wl_list_empty(&es->frame_callback_list)) {
1171                 wl_list_insert_list(new_output->frame_callback_list.prev,
1172                                     &es->frame_callback_list);
1173                 wl_list_init(&es->frame_callback_list);
1174         }
1175 }
1176
1177 static void
1178 surface_attach(struct wl_client *client,
1179                struct wl_resource *resource,
1180                struct wl_resource *buffer_resource, int32_t sx, int32_t sy)
1181 {
1182         struct weston_surface *es = resource->data;
1183         struct wl_buffer *buffer = NULL;
1184
1185         if (buffer_resource)
1186                 buffer = buffer_resource->data;
1187
1188         weston_surface_attach(&es->surface, buffer);
1189
1190         if (buffer && es->configure)
1191                 es->configure(es, sx, sy);
1192 }
1193
1194 static void
1195 texture_set_subimage(struct weston_surface *surface,
1196                      int32_t x, int32_t y, int32_t width, int32_t height)
1197 {
1198         glBindTexture(GL_TEXTURE_2D, surface->texture);
1199
1200 #ifdef GL_UNPACK_ROW_LENGTH
1201         /* Mesa does not define GL_EXT_unpack_subimage */
1202
1203         if (surface->compositor->has_unpack_subimage) {
1204                 glPixelStorei(GL_UNPACK_ROW_LENGTH, surface->pitch);
1205                 glPixelStorei(GL_UNPACK_SKIP_PIXELS, x);
1206                 glPixelStorei(GL_UNPACK_SKIP_ROWS, y);
1207
1208                 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
1209                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1210                                 wl_shm_buffer_get_data(surface->buffer));
1211                 return;
1212         }
1213 #endif
1214
1215         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1216                      surface->pitch, surface->buffer->height, 0,
1217                      GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1218                      wl_shm_buffer_get_data(surface->buffer));
1219 }
1220
1221 static void
1222 surface_damage(struct wl_client *client,
1223                struct wl_resource *resource,
1224                int32_t x, int32_t y, int32_t width, int32_t height)
1225 {
1226         struct weston_surface *es = resource->data;
1227
1228         weston_surface_damage_rectangle(es, x, y, width, height);
1229
1230         if (es->buffer && wl_buffer_is_shm(es->buffer))
1231                 texture_set_subimage(es, x, y, width, height);
1232 }
1233
1234 static void
1235 destroy_frame_callback(struct wl_resource *resource)
1236 {
1237         struct weston_frame_callback *cb = resource->data;
1238
1239         wl_list_remove(&cb->link);
1240         free(cb);
1241 }
1242
1243 static void
1244 surface_frame(struct wl_client *client,
1245               struct wl_resource *resource, uint32_t callback)
1246 {
1247         struct weston_frame_callback *cb;
1248         struct weston_surface *es = resource->data;
1249
1250         cb = malloc(sizeof *cb);
1251         if (cb == NULL) {
1252                 wl_resource_post_no_memory(resource);
1253                 return;
1254         }
1255
1256         cb->resource.object.interface = &wl_callback_interface;
1257         cb->resource.object.id = callback;
1258         cb->resource.destroy = destroy_frame_callback;
1259         cb->resource.client = client;
1260         cb->resource.data = cb;
1261
1262         wl_client_add_resource(client, &cb->resource);
1263
1264         if (es->output) {
1265                 wl_list_insert(es->output->frame_callback_list.prev,
1266                                &cb->link);
1267         } else {
1268                 wl_list_insert(es->frame_callback_list.prev, &cb->link);
1269         }
1270 }
1271
1272 static void
1273 surface_set_opaque_region(struct wl_client *client,
1274                           struct wl_resource *resource,
1275                           struct wl_resource *region_resource)
1276 {
1277         struct weston_surface *surface = resource->data;
1278         struct weston_region *region;
1279
1280         pixman_region32_fini(&surface->opaque);
1281
1282         if (region_resource) {
1283                 region = region_resource->data;
1284                 pixman_region32_init_rect(&surface->opaque, 0, 0,
1285                                           surface->geometry.width,
1286                                           surface->geometry.height);
1287                 pixman_region32_intersect(&surface->opaque,
1288                                           &surface->opaque, &region->region);
1289         } else {
1290                 pixman_region32_init(&surface->opaque);
1291         }
1292
1293         surface->geometry.dirty = 1;
1294 }
1295
1296 static void
1297 surface_set_input_region(struct wl_client *client,
1298                          struct wl_resource *resource,
1299                          struct wl_resource *region_resource)
1300 {
1301         struct weston_surface *surface = resource->data;
1302         struct weston_region *region;
1303
1304         if (region_resource) {
1305                 region = region_resource->data;
1306                 pixman_region32_init_rect(&surface->input, 0, 0,
1307                                           surface->geometry.width,
1308                                           surface->geometry.height);
1309                 pixman_region32_intersect(&surface->input,
1310                                           &surface->input, &region->region);
1311         } else {
1312                 pixman_region32_init_rect(&surface->input, 0, 0,
1313                                           surface->geometry.width,
1314                                           surface->geometry.height);
1315         }
1316
1317         weston_compositor_schedule_repaint(surface->compositor);
1318 }
1319
1320 static const struct wl_surface_interface surface_interface = {
1321         surface_destroy,
1322         surface_attach,
1323         surface_damage,
1324         surface_frame,
1325         surface_set_opaque_region,
1326         surface_set_input_region
1327 };
1328
1329 static void
1330 compositor_create_surface(struct wl_client *client,
1331                           struct wl_resource *resource, uint32_t id)
1332 {
1333         struct weston_compositor *ec = resource->data;
1334         struct weston_surface *surface;
1335
1336         surface = weston_surface_create(ec);
1337         if (surface == NULL) {
1338                 wl_resource_post_no_memory(resource);
1339                 return;
1340         }
1341
1342         surface->surface.resource.destroy = destroy_surface;
1343
1344         surface->surface.resource.object.id = id;
1345         surface->surface.resource.object.interface = &wl_surface_interface;
1346         surface->surface.resource.object.implementation =
1347                 (void (**)(void)) &surface_interface;
1348         surface->surface.resource.data = surface;
1349
1350         wl_client_add_resource(client, &surface->surface.resource);
1351 }
1352
1353 static void
1354 destroy_region(struct wl_resource *resource)
1355 {
1356         struct weston_region *region =
1357                 container_of(resource, struct weston_region, resource);
1358
1359         pixman_region32_fini(&region->region);
1360         free(region);
1361 }
1362
1363 static void
1364 region_destroy(struct wl_client *client, struct wl_resource *resource)
1365 {
1366         wl_resource_destroy(resource);
1367 }
1368
1369 static void
1370 region_add(struct wl_client *client, struct wl_resource *resource,
1371            int32_t x, int32_t y, int32_t width, int32_t height)
1372 {
1373         struct weston_region *region = resource->data;
1374
1375         pixman_region32_union_rect(&region->region, &region->region,
1376                                    x, y, width, height);
1377 }
1378
1379 static void
1380 region_subtract(struct wl_client *client, struct wl_resource *resource,
1381                 int32_t x, int32_t y, int32_t width, int32_t height)
1382 {
1383         struct weston_region *region = resource->data;
1384         pixman_region32_t rect;
1385
1386         pixman_region32_init_rect(&rect, x, y, width, height);
1387         pixman_region32_subtract(&region->region, &region->region, &rect);
1388         pixman_region32_fini(&rect);
1389 }
1390
1391 static const struct wl_region_interface region_interface = {
1392         region_destroy,
1393         region_add,
1394         region_subtract
1395 };
1396
1397 static void
1398 compositor_create_region(struct wl_client *client,
1399                          struct wl_resource *resource, uint32_t id)
1400 {
1401         struct weston_region *region;
1402
1403         region = malloc(sizeof *region);
1404         if (region == NULL) {
1405                 wl_resource_post_no_memory(resource);
1406                 return;
1407         }
1408
1409         region->resource.destroy = destroy_region;
1410
1411         region->resource.object.id = id;
1412         region->resource.object.interface = &wl_region_interface;
1413         region->resource.object.implementation =
1414                 (void (**)(void)) &region_interface;
1415         region->resource.data = region;
1416
1417         pixman_region32_init(&region->region);
1418
1419         wl_client_add_resource(client, &region->resource);
1420 }
1421
1422 static const struct wl_compositor_interface compositor_interface = {
1423         compositor_create_surface,
1424         compositor_create_region
1425 };
1426
1427 WL_EXPORT void
1428 weston_compositor_wake(struct weston_compositor *compositor)
1429 {
1430         compositor->state = WESTON_COMPOSITOR_ACTIVE;
1431         weston_compositor_fade(compositor, 0.0);
1432
1433         wl_event_source_timer_update(compositor->idle_source,
1434                                      compositor->idle_time * 1000);
1435 }
1436
1437 static void
1438 weston_compositor_dpms_on(struct weston_compositor *compositor)
1439 {
1440         struct weston_output *output;
1441
1442         wl_list_for_each(output, &compositor->output_list, link)
1443                 if (output->set_dpms)
1444                         output->set_dpms(output, WESTON_DPMS_ON);
1445 }
1446
1447 WL_EXPORT void
1448 weston_compositor_activity(struct weston_compositor *compositor)
1449 {
1450         if (compositor->state == WESTON_COMPOSITOR_ACTIVE) {
1451                 weston_compositor_wake(compositor);
1452         } else {
1453                 weston_compositor_dpms_on(compositor);
1454                 wl_signal_emit(&compositor->unlock_signal, compositor);
1455         }
1456 }
1457
1458 static void
1459 weston_compositor_idle_inhibit(struct weston_compositor *compositor)
1460 {
1461         weston_compositor_activity(compositor);
1462         compositor->idle_inhibit++;
1463 }
1464
1465 static void
1466 weston_compositor_idle_release(struct weston_compositor *compositor)
1467 {
1468         compositor->idle_inhibit--;
1469         weston_compositor_activity(compositor);
1470 }
1471
1472 static int
1473 idle_handler(void *data)
1474 {
1475         struct weston_compositor *compositor = data;
1476
1477         if (compositor->idle_inhibit)
1478                 return 1;
1479
1480         weston_compositor_fade(compositor, 1.0);
1481
1482         return 1;
1483 }
1484
1485 static  void
1486 weston_input_update_drag_surface(struct wl_input_device *input_device,
1487                                  int dx, int dy);
1488
1489 WL_EXPORT void
1490 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1491 {
1492         struct weston_output *output;
1493         const struct wl_pointer_grab_interface *interface;
1494         struct weston_input_device *wd = (struct weston_input_device *) device;
1495         struct weston_compositor *ec = wd->compositor;
1496         int x_valid = 0, y_valid = 0;
1497         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1498
1499         weston_compositor_activity(ec);
1500
1501         wl_list_for_each(output, &ec->output_list, link) {
1502                 if (output->x <= x && x < output->x + output->current->width)
1503                         x_valid = 1;
1504
1505                 if (output->y <= y && y < output->y + output->current->height)
1506                         y_valid = 1;
1507
1508                 /* FIXME: calculate this only on output addition/deletion */
1509                 if (output->x < min_x)
1510                         min_x = output->x;
1511                 if (output->y < min_y)
1512                         min_y = output->y;
1513
1514                 if (output->x + output->current->width > max_x)
1515                         max_x = output->x + output->current->width - 1;
1516                 if (output->y + output->current->height > max_y)
1517                         max_y = output->y + output->current->height - 1;
1518         }
1519
1520         if (!x_valid) {
1521                 if (x < min_x)
1522                         x = min_x;
1523                 else if (x >= max_x)
1524                         x = max_x;
1525         }
1526         if (!y_valid) {
1527                 if (y < min_y)
1528                         y = min_y;
1529                 else  if (y >= max_y)
1530                         y = max_y;
1531         }
1532
1533         weston_input_update_drag_surface(device,
1534                                          x - device->x, y - device->y);
1535
1536         device->x = x;
1537         device->y = y;
1538
1539         wl_list_for_each(output, &ec->output_list, link)
1540                 if (output->zoom.active &&
1541                     pixman_region32_contains_point(&output->region, x, y, NULL))
1542                         weston_output_update_zoom(output, x, y);
1543
1544         weston_device_repick(device);
1545         interface = device->pointer_grab->interface;
1546         interface->motion(device->pointer_grab, time,
1547                           device->pointer_grab->x, device->pointer_grab->y);
1548
1549         if (wd->sprite) {
1550                 weston_surface_set_position(wd->sprite,
1551                                             device->x - wd->hotspot_x,
1552                                             device->y - wd->hotspot_y);
1553
1554                 weston_compositor_schedule_repaint(ec);
1555         }
1556 }
1557
1558 WL_EXPORT void
1559 weston_surface_activate(struct weston_surface *surface,
1560                         struct weston_input_device *device)
1561 {
1562         struct weston_compositor *compositor = device->compositor;
1563
1564         wl_input_device_set_keyboard_focus(&device->input_device,
1565                                            &surface->surface);
1566         wl_data_device_set_keyboard_focus(&device->input_device);
1567
1568         wl_signal_emit(&compositor->activate_signal, surface);
1569 }
1570
1571 WL_EXPORT void
1572 notify_button(struct wl_input_device *device,
1573               uint32_t time, int32_t button, int32_t state)
1574 {
1575         struct weston_input_device *wd = (struct weston_input_device *) device;
1576         struct weston_compositor *compositor = wd->compositor;
1577         struct weston_surface *focus = (struct weston_surface *) device->pointer_focus;
1578         uint32_t serial = wl_display_next_serial(compositor->wl_display);
1579
1580         if (state) {
1581                 if (compositor->ping_handler && focus)
1582                         compositor->ping_handler(focus, serial);
1583                 weston_compositor_idle_inhibit(compositor);
1584                 if (device->button_count == 0) {
1585                         device->grab_button = button;
1586                         device->grab_time = time;
1587                         device->grab_x = device->x;
1588                         device->grab_y = device->y;
1589                 }
1590                 device->button_count++;
1591         } else {
1592                 weston_compositor_idle_release(compositor);
1593                 device->button_count--;
1594         }
1595
1596         weston_compositor_run_binding(compositor, wd, time, 0, button, 0, state);
1597
1598         device->pointer_grab->interface->button(device->pointer_grab, time, button, state);
1599
1600         if (device->button_count == 1)
1601                 device->grab_serial =
1602                         wl_display_get_serial(compositor->wl_display);
1603 }
1604
1605 WL_EXPORT void
1606 notify_axis(struct wl_input_device *device,
1607               uint32_t time, uint32_t axis, int32_t value)
1608 {
1609         struct weston_input_device *wd = (struct weston_input_device *) device;
1610         struct weston_compositor *compositor = wd->compositor;
1611         struct weston_surface *focus = (struct weston_surface *) device->pointer_focus;
1612         uint32_t serial = wl_display_next_serial(compositor->wl_display);
1613
1614         if (compositor->ping_handler && focus)
1615                 compositor->ping_handler(focus, serial);
1616
1617         weston_compositor_activity(compositor);
1618
1619         if (value)
1620                 weston_compositor_run_binding(compositor, wd,
1621                                                 time, 0, 0, axis, value);
1622         else
1623                 return;
1624
1625         if (device->pointer_focus_resource)
1626                 wl_resource_post_event(device->pointer_focus_resource,
1627                                 WL_INPUT_DEVICE_AXIS, time, axis, value);
1628 }
1629
1630 static void
1631 update_modifier_state(struct weston_input_device *device,
1632                       uint32_t key, uint32_t state)
1633 {
1634         uint32_t modifier;
1635
1636         switch (key) {
1637         case KEY_LEFTCTRL:
1638         case KEY_RIGHTCTRL:
1639                 modifier = MODIFIER_CTRL;
1640                 break;
1641
1642         case KEY_LEFTALT:
1643         case KEY_RIGHTALT:
1644                 modifier = MODIFIER_ALT;
1645                 break;
1646
1647         case KEY_LEFTMETA:
1648         case KEY_RIGHTMETA:
1649                 modifier = MODIFIER_SUPER;
1650                 break;
1651
1652         default:
1653                 modifier = 0;
1654                 break;
1655         }
1656
1657         if (state)
1658                 device->modifier_state |= modifier;
1659         else
1660                 device->modifier_state &= ~modifier;
1661 }
1662
1663 WL_EXPORT void
1664 notify_key(struct wl_input_device *device,
1665            uint32_t time, uint32_t key, uint32_t state)
1666 {
1667         struct weston_input_device *wd = (struct weston_input_device *) device;
1668         struct weston_compositor *compositor = wd->compositor;
1669         struct weston_surface *focus = (struct weston_surface *) device->pointer_focus;
1670         uint32_t serial = wl_display_next_serial(compositor->wl_display);
1671         uint32_t *k, *end;
1672
1673         if (state) {
1674                 if (compositor->ping_handler && focus)
1675                         compositor->ping_handler(focus, serial);
1676
1677                 weston_compositor_idle_inhibit(compositor);
1678                 device->grab_key = key;
1679                 device->grab_time = time;
1680         } else {
1681                 weston_compositor_idle_release(compositor);
1682         }
1683
1684         update_modifier_state(wd, key, state);
1685         end = device->keys.data + device->keys.size;
1686         for (k = device->keys.data; k < end; k++) {
1687                 if (*k == key)
1688                         *k = *--end;
1689         }
1690         device->keys.size = (void *) end - device->keys.data;
1691         if (state) {
1692                 k = wl_array_add(&device->keys, sizeof *k);
1693                 *k = key;
1694         }
1695
1696         if (device->keyboard_grab == &device->default_keyboard_grab)
1697                 weston_compositor_run_binding(compositor, wd,
1698                                               time, key, 0, 0, state);
1699
1700         device->keyboard_grab->interface->key(device->keyboard_grab,
1701                                               time, key, state);
1702 }
1703
1704 WL_EXPORT void
1705 notify_pointer_focus(struct wl_input_device *device,
1706                      struct weston_output *output, int32_t x, int32_t y)
1707 {
1708         struct weston_input_device *wd = (struct weston_input_device *) device;
1709         struct weston_compositor *compositor = wd->compositor;
1710
1711         if (output) {
1712                 weston_input_update_drag_surface(device, x - device->x,
1713                                                  y - device->y);
1714
1715                 device->x = x;
1716                 device->y = y;
1717                 compositor->focus = 1;
1718                 weston_compositor_repick(compositor);
1719         } else {
1720                 compositor->focus = 0;
1721                 weston_compositor_repick(compositor);
1722         }
1723 }
1724
1725 static void
1726 destroy_device_saved_kbd_focus(struct wl_listener *listener, void *data)
1727 {
1728         struct weston_input_device *wd;
1729
1730         wd = container_of(listener, struct weston_input_device,
1731                           saved_kbd_focus_listener);
1732
1733         wd->saved_kbd_focus = NULL;
1734 }
1735
1736 WL_EXPORT void
1737 notify_keyboard_focus(struct wl_input_device *device, struct wl_array *keys)
1738 {
1739         struct weston_input_device *wd =
1740                 (struct weston_input_device *) device;
1741         struct weston_compositor *compositor = wd->compositor;
1742         struct wl_surface *surface;
1743         uint32_t *k;
1744
1745         if (keys) {
1746                 wl_array_copy(&wd->input_device.keys, keys);
1747                 wd->modifier_state = 0;
1748                 wl_array_for_each(k, &device->keys) {
1749                         weston_compositor_idle_inhibit(compositor);
1750                         update_modifier_state(wd, *k, 1);
1751                 }
1752
1753                 surface = wd->saved_kbd_focus;
1754
1755                 if (surface) {
1756                         wl_list_remove(&wd->saved_kbd_focus_listener.link);
1757                         wl_input_device_set_keyboard_focus(&wd->input_device,
1758                                                            surface);
1759                         wd->saved_kbd_focus = NULL;
1760                 }
1761         } else {
1762                 wl_array_for_each(k, &device->keys)
1763                         weston_compositor_idle_release(compositor);
1764
1765                 wd->modifier_state = 0;
1766
1767                 surface = wd->input_device.keyboard_focus;
1768
1769                 if (surface) {
1770                         wd->saved_kbd_focus = surface;
1771                         wd->saved_kbd_focus_listener.notify =
1772                                 destroy_device_saved_kbd_focus;
1773                         wl_signal_add(&surface->resource.destroy_signal,
1774                                       &wd->saved_kbd_focus_listener);
1775                 }
1776
1777                 wl_input_device_set_keyboard_focus(&wd->input_device, NULL);
1778                 /* FIXME: We really need keyboard grab cancel here to
1779                  * let the grab shut down properly.  As it is we leak
1780                  * the grab data. */
1781                 wl_input_device_end_keyboard_grab(&wd->input_device);
1782         }
1783 }
1784
1785 static void
1786 lose_touch_focus_resource(struct wl_listener *listener, void *data)
1787 {
1788         struct weston_input_device *device =
1789                 container_of(listener, struct weston_input_device,
1790                              touch_focus_resource_listener);
1791
1792         device->touch_focus_resource = NULL;
1793 }
1794
1795 static void
1796 lose_touch_focus(struct wl_listener *listener, void *data)
1797 {
1798         struct weston_input_device *device =
1799                 container_of(listener, struct weston_input_device,
1800                              touch_focus_listener);
1801
1802         device->touch_focus = NULL;
1803 }
1804
1805 static void
1806 touch_set_focus(struct weston_input_device *device,
1807                 struct wl_surface *surface)
1808 {
1809         struct wl_input_device *input_device = &device->input_device;
1810         struct wl_resource *resource;
1811
1812         if (device->touch_focus == surface)
1813                 return;
1814
1815         if (surface) {
1816                 resource =
1817                         find_resource_for_client(&input_device->resource_list,
1818                                                  surface->resource.client);
1819                 if (!resource) {
1820                         fprintf(stderr, "couldn't find resource\n");
1821                         return;
1822                 }
1823
1824                 device->touch_focus_resource_listener.notify =
1825                         lose_touch_focus_resource;
1826                 wl_signal_add(&resource->destroy_signal,
1827                               &device->touch_focus_resource_listener);
1828                 device->touch_focus_listener.notify = lose_touch_focus;
1829                 wl_signal_add(&surface->resource.destroy_signal,
1830                                &device->touch_focus_listener);
1831
1832                 device->touch_focus = surface;
1833                 device->touch_focus_resource = resource;
1834         } else {
1835                 if (device->touch_focus)
1836                         wl_list_remove(&device->touch_focus_listener.link);
1837                 if (device->touch_focus_resource)
1838                         wl_list_remove(&device->touch_focus_resource_listener.link);
1839                 device->touch_focus = NULL;
1840                 device->touch_focus_resource = NULL;
1841         }
1842 }
1843
1844 /**
1845  * notify_touch - emulates button touches and notifies surfaces accordingly.
1846  *
1847  * It assumes always the correct cycle sequence until it gets here: touch_down
1848  * → touch_update → ... → touch_update → touch_end. The driver is responsible
1849  * for sending along such order.
1850  *
1851  */
1852 WL_EXPORT void
1853 notify_touch(struct wl_input_device *device, uint32_t time, int touch_id,
1854              int x, int y, int touch_type)
1855 {
1856         struct weston_input_device *wd = (struct weston_input_device *) device;
1857         struct weston_compositor *ec = wd->compositor;
1858         struct weston_surface *es;
1859         int32_t sx, sy;
1860         uint32_t serial = 0;
1861
1862         switch (touch_type) {
1863         case WL_INPUT_DEVICE_TOUCH_DOWN:
1864                 weston_compositor_idle_inhibit(ec);
1865
1866                 wd->num_tp++;
1867
1868                 /* the first finger down picks the surface, and all further go
1869                  * to that surface for the remainder of the touch session i.e.
1870                  * until all touch points are up again. */
1871                 if (wd->num_tp == 1) {
1872                         es = weston_compositor_pick_surface(ec, x, y, &sx, &sy);
1873                         touch_set_focus(wd, &es->surface);
1874                 } else if (wd->touch_focus) {
1875                         es = (struct weston_surface *) wd->touch_focus;
1876                         weston_surface_from_global(es, x, y, &sx, &sy);
1877                 }
1878
1879                 if (wd->touch_focus_resource && wd->touch_focus)
1880                         wl_input_device_send_touch_down(wd->touch_focus_resource,
1881                                                         serial, time, &wd->touch_focus->resource,
1882                                                         touch_id, sx, sy);
1883                 break;
1884         case WL_INPUT_DEVICE_TOUCH_MOTION:
1885                 es = (struct weston_surface *) wd->touch_focus;
1886                 if (!es)
1887                         break;
1888
1889                 weston_surface_from_global(es, x, y, &sx, &sy);
1890                 if (wd->touch_focus_resource)
1891                         wl_input_device_send_touch_motion(wd->touch_focus_resource,
1892                                                           time, touch_id, sx, sy);
1893                 break;
1894         case WL_INPUT_DEVICE_TOUCH_UP:
1895                 weston_compositor_idle_release(ec);
1896                 wd->num_tp--;
1897
1898                 if (wd->touch_focus_resource)
1899                         wl_input_device_send_touch_up(wd->touch_focus_resource,
1900                                                       serial, time, touch_id);
1901                 if (wd->num_tp == 0)
1902                         touch_set_focus(wd, NULL);
1903                 break;
1904         }
1905 }
1906
1907 static void
1908 input_device_attach(struct wl_client *client,
1909                     struct wl_resource *resource,
1910                     uint32_t serial,
1911                     struct wl_resource *buffer_resource, int32_t x, int32_t y)
1912 {
1913         struct weston_input_device *device = resource->data;
1914         struct weston_compositor *compositor = device->compositor;
1915         struct wl_buffer *buffer = NULL;
1916
1917         if (serial < device->input_device.pointer_focus_serial)
1918                 return;
1919         if (device->input_device.pointer_focus == NULL)
1920                 return;
1921         if (device->input_device.pointer_focus->resource.client != client)
1922                 return;
1923
1924         if (buffer_resource)
1925                 buffer = buffer_resource->data;
1926
1927         weston_surface_attach(&device->sprite->surface, buffer);
1928
1929         if (!buffer)
1930                 return;
1931
1932         if (!weston_surface_is_mapped(device->sprite)) {
1933                 wl_list_insert(&compositor->cursor_layer.surface_list,
1934                                &device->sprite->layer_link);
1935                 weston_surface_assign_output(device->sprite);
1936         }
1937
1938
1939         device->hotspot_x = x;
1940         device->hotspot_y = y;
1941         weston_surface_configure(device->sprite,
1942                                  device->input_device.x - device->hotspot_x,
1943                                  device->input_device.y - device->hotspot_y,
1944                                  buffer->width, buffer->height);
1945
1946         surface_damage(NULL, &device->sprite->surface.resource,
1947                        0, 0, buffer->width, buffer->height);
1948 }
1949
1950 static const struct wl_input_device_interface input_device_interface = {
1951         input_device_attach,
1952 };
1953
1954 static void
1955 handle_drag_surface_destroy(struct wl_listener *listener, void *data)
1956 {
1957         struct weston_input_device *device;
1958
1959         device = container_of(listener, struct weston_input_device,
1960                               drag_surface_destroy_listener);
1961
1962         device->drag_surface = NULL;
1963 }
1964
1965 static void unbind_input_device(struct wl_resource *resource)
1966 {
1967         wl_list_remove(&resource->link);
1968         free(resource);
1969 }
1970
1971 static void
1972 bind_input_device(struct wl_client *client,
1973                   void *data, uint32_t version, uint32_t id)
1974 {
1975         struct wl_input_device *device = data;
1976         struct wl_resource *resource;
1977
1978         resource = wl_client_add_object(client, &wl_input_device_interface,
1979                                         &input_device_interface, id, data);
1980         wl_list_insert(&device->resource_list, &resource->link);
1981         resource->destroy = unbind_input_device;
1982 }
1983
1984 static void
1985 device_handle_new_drag_icon(struct wl_listener *listener, void *data)
1986 {
1987         struct weston_input_device *device;
1988
1989         device = container_of(listener, struct weston_input_device,
1990                               new_drag_icon_listener);
1991
1992         weston_input_update_drag_surface(&device->input_device, 0, 0);
1993 }
1994
1995 WL_EXPORT void
1996 weston_input_device_init(struct weston_input_device *device,
1997                          struct weston_compositor *ec)
1998 {
1999         wl_input_device_init(&device->input_device);
2000
2001         wl_display_add_global(ec->wl_display, &wl_input_device_interface,
2002                               device, bind_input_device);
2003
2004         device->sprite = weston_surface_create(ec);
2005         device->sprite->surface.resource.data = device->sprite;
2006
2007         device->compositor = ec;
2008         device->hotspot_x = 16;
2009         device->hotspot_y = 16;
2010         device->modifier_state = 0;
2011         device->num_tp = 0;
2012
2013         device->drag_surface_destroy_listener.notify =
2014                 handle_drag_surface_destroy;
2015
2016         wl_list_insert(ec->input_device_list.prev, &device->link);
2017
2018         device->new_drag_icon_listener.notify = device_handle_new_drag_icon;
2019         wl_signal_add(&device->input_device.drag_icon_signal,
2020                       &device->new_drag_icon_listener);
2021 }
2022
2023 WL_EXPORT void
2024 weston_input_device_release(struct weston_input_device *device)
2025 {
2026         wl_list_remove(&device->link);
2027         /* The global object is destroyed at wl_display_destroy() time. */
2028
2029         if (device->sprite)
2030                 destroy_surface(&device->sprite->surface.resource);
2031
2032         wl_input_device_release(&device->input_device);
2033 }
2034
2035 static void
2036 drag_surface_configure(struct weston_surface *es, int32_t sx, int32_t sy)
2037 {
2038         weston_surface_configure(es,
2039                                  es->geometry.x + sx, es->geometry.y + sy,
2040                                  es->buffer->width, es->buffer->height);
2041 }
2042
2043 static int
2044 device_setup_new_drag_surface(struct weston_input_device *device,
2045                               struct weston_surface *surface)
2046 {
2047         struct wl_input_device *input_device = &device->input_device;
2048
2049         if (surface->configure) {
2050                 wl_resource_post_error(&surface->surface.resource,
2051                                        WL_DISPLAY_ERROR_INVALID_OBJECT,
2052                                        "surface->configure already set");
2053                 return 0;
2054         }
2055
2056         device->drag_surface = surface;
2057
2058         weston_surface_set_position(device->drag_surface,
2059                                     input_device->x, input_device->y);
2060
2061         surface->configure = drag_surface_configure;
2062
2063         wl_signal_add(&surface->surface.resource.destroy_signal,
2064                        &device->drag_surface_destroy_listener);
2065
2066         return 1;
2067 }
2068
2069 static void
2070 device_release_drag_surface(struct weston_input_device *device)
2071 {
2072         device->drag_surface->configure = NULL;
2073         undef_region(&device->drag_surface->input);
2074         wl_list_remove(&device->drag_surface_destroy_listener.link);
2075         device->drag_surface = NULL;
2076 }
2077
2078 static void
2079 device_map_drag_surface(struct weston_input_device *device)
2080 {
2081         if (weston_surface_is_mapped(device->drag_surface) ||
2082             !device->drag_surface->buffer)
2083                 return;
2084
2085         wl_list_insert(&device->sprite->layer_link,
2086                        &device->drag_surface->layer_link);
2087         weston_surface_assign_output(device->drag_surface);
2088         empty_region(&device->drag_surface->input);
2089 }
2090
2091 static  void
2092 weston_input_update_drag_surface(struct wl_input_device *input_device,
2093                                  int dx, int dy)
2094 {
2095         int surface_changed = 0;
2096         struct weston_input_device *device = (struct weston_input_device *)
2097                 input_device;
2098
2099         if (!device->drag_surface && !input_device->drag_surface)
2100                 return;
2101
2102         if (device->drag_surface && input_device->drag_surface &&
2103             (&device->drag_surface->surface.resource !=
2104              &input_device->drag_surface->resource))
2105                 /* between calls to this funcion we got a new drag_surface */
2106                 surface_changed = 1;
2107
2108         if (!input_device->drag_surface || surface_changed) {
2109                 device_release_drag_surface(device);
2110                 if (!surface_changed)
2111                         return;
2112         }
2113
2114         if (!device->drag_surface || surface_changed) {
2115                 struct weston_surface *surface = (struct weston_surface *)
2116                         input_device->drag_surface;
2117                 if (!device_setup_new_drag_surface(device, surface))
2118                         return;
2119         }
2120
2121         /* the client may not have attached a buffer to the drag surface
2122          * when we setup it up, so check if map is needed on every update */
2123         device_map_drag_surface(device);
2124
2125         /* the client may have attached a buffer with a different size to
2126          * the drag surface, causing the input region to be reset */
2127         if (region_is_undefined(&device->drag_surface->input))
2128                 empty_region(&device->drag_surface->input);
2129
2130         if (!dx && !dy)
2131                 return;
2132
2133         weston_surface_set_position(device->drag_surface,
2134                                     device->drag_surface->geometry.x + dx,
2135                                     device->drag_surface->geometry.y + dy);
2136 }
2137
2138 WL_EXPORT void
2139 weston_compositor_update_drag_surfaces(struct weston_compositor *compositor)
2140 {
2141         weston_input_update_drag_surface(compositor->input_device, 0, 0);
2142 }
2143
2144 static void
2145 bind_output(struct wl_client *client,
2146             void *data, uint32_t version, uint32_t id)
2147 {
2148         struct weston_output *output = data;
2149         struct weston_mode *mode;
2150         struct wl_resource *resource;
2151
2152         resource = wl_client_add_object(client,
2153                                         &wl_output_interface, NULL, id, data);
2154
2155         wl_output_send_geometry(resource,
2156                                 output->x,
2157                                 output->y,
2158                                 output->mm_width,
2159                                 output->mm_height,
2160                                 output->subpixel,
2161                                 output->make, output->model);
2162
2163         wl_list_for_each (mode, &output->mode_list, link) {
2164                 wl_output_send_mode(resource,
2165                                     mode->flags,
2166                                     mode->width,
2167                                     mode->height,
2168                                     mode->refresh);
2169         }
2170 }
2171
2172 static const char vertex_shader[] =
2173         "uniform mat4 proj;\n"
2174         "attribute vec2 position;\n"
2175         "attribute vec2 texcoord;\n"
2176         "varying vec2 v_texcoord;\n"
2177         "void main()\n"
2178         "{\n"
2179         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
2180         "   v_texcoord = texcoord;\n"
2181         "}\n";
2182
2183 static const char texture_fragment_shader[] =
2184         "precision mediump float;\n"
2185         "varying vec2 v_texcoord;\n"
2186         "uniform sampler2D tex;\n"
2187         "uniform float alpha;\n"
2188         "uniform float bright;\n"
2189         "uniform float saturation;\n"
2190         "uniform float texwidth;\n"
2191         "void main()\n"
2192         "{\n"
2193         "   if (v_texcoord.x < 0.0 || v_texcoord.x > texwidth ||\n"
2194         "       v_texcoord.y < 0.0 || v_texcoord.y > 1.0)\n"
2195         "      discard;\n"
2196         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
2197         "   float gray = dot(gl_FragColor.rgb, vec3(0.299, 0.587, 0.114));\n"
2198         "   vec3 range = (gl_FragColor.rgb - vec3 (gray, gray, gray)) * saturation;\n"
2199         "   gl_FragColor = vec4(vec3(gray + range), gl_FragColor.a);\n"
2200         "   gl_FragColor = vec4(vec3(bright, bright, bright) * gl_FragColor.rgb, gl_FragColor.a);\n"
2201         "   gl_FragColor = alpha * gl_FragColor;\n"
2202         "}\n";
2203
2204 static const char solid_fragment_shader[] =
2205         "precision mediump float;\n"
2206         "uniform vec4 color;\n"
2207         "uniform float alpha;\n"
2208         "void main()\n"
2209         "{\n"
2210         "   gl_FragColor = alpha * color\n;"
2211         "}\n";
2212
2213 static int
2214 compile_shader(GLenum type, const char *source)
2215 {
2216         GLuint s;
2217         char msg[512];
2218         GLint status;
2219
2220         s = glCreateShader(type);
2221         glShaderSource(s, 1, &source, NULL);
2222         glCompileShader(s);
2223         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
2224         if (!status) {
2225                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
2226                 fprintf(stderr, "shader info: %s\n", msg);
2227                 return GL_NONE;
2228         }
2229
2230         return s;
2231 }
2232
2233 static int
2234 weston_shader_init(struct weston_shader *shader,
2235                    const char *vertex_source, const char *fragment_source)
2236 {
2237         char msg[512];
2238         GLint status;
2239
2240         shader->vertex_shader =
2241                 compile_shader(GL_VERTEX_SHADER, vertex_source);
2242         shader->fragment_shader =
2243                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
2244
2245         shader->program = glCreateProgram();
2246         glAttachShader(shader->program, shader->vertex_shader);
2247         glAttachShader(shader->program, shader->fragment_shader);
2248         glBindAttribLocation(shader->program, 0, "position");
2249         glBindAttribLocation(shader->program, 1, "texcoord");
2250
2251         glLinkProgram(shader->program);
2252         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
2253         if (!status) {
2254                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
2255                 fprintf(stderr, "link info: %s\n", msg);
2256                 return -1;
2257         }
2258
2259         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
2260         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
2261         shader->alpha_uniform = glGetUniformLocation(shader->program, "alpha");
2262         shader->brightness_uniform = glGetUniformLocation(shader->program, "bright");
2263         shader->saturation_uniform = glGetUniformLocation(shader->program, "saturation");
2264         shader->color_uniform = glGetUniformLocation(shader->program, "color");
2265         shader->texwidth_uniform = glGetUniformLocation(shader->program,
2266                                                         "texwidth");
2267
2268         return 0;
2269 }
2270
2271 WL_EXPORT void
2272 weston_output_destroy(struct weston_output *output)
2273 {
2274         struct weston_compositor *c = output->compositor;
2275
2276         pixman_region32_fini(&output->region);
2277         pixman_region32_fini(&output->previous_damage);
2278
2279         wl_display_remove_global(c->wl_display, output->global);
2280 }
2281
2282 WL_EXPORT void
2283 weston_output_update_zoom(struct weston_output *output, int x, int y)
2284 {
2285         float ratio;
2286
2287         if (output->zoom.level <= 0)
2288                 return;
2289
2290         output->zoom.magnification = 1 / output->zoom.level;
2291         ratio = 1 - (1 / output->zoom.magnification);
2292
2293         output->zoom.trans_x = (((float)(x - output->x) / output->current->width) * (ratio * 2)) - ratio;
2294         output->zoom.trans_y = (((float)(y - output->y) / output->current->height) * (ratio * 2)) - ratio;
2295
2296         output->dirty = 1;
2297         weston_output_damage(output);
2298 }
2299
2300 WL_EXPORT void
2301 weston_output_update_matrix(struct weston_output *output)
2302 {
2303         int flip;
2304         struct weston_matrix camera;
2305         struct weston_matrix modelview;
2306
2307         weston_matrix_init(&output->matrix);
2308         weston_matrix_translate(&output->matrix,
2309                                 -(output->x + (output->border.right + output->current->width - output->border.left) / 2.0),
2310                                 -(output->y + (output->border.bottom + output->current->height - output->border.top) / 2.0), 0);
2311
2312         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
2313         weston_matrix_scale(&output->matrix,
2314                             2.0 / (output->current->width + output->border.left + output->border.right),
2315                             flip * 2.0 / (output->current->height + output->border.top + output->border.bottom), 1);
2316         if (output->zoom.active) {
2317                 weston_matrix_init(&camera);
2318                 weston_matrix_init(&modelview);
2319                 weston_matrix_translate(&camera, output->zoom.trans_x, flip * output->zoom.trans_y, 0);
2320                 weston_matrix_invert(&modelview, &camera);
2321                 weston_matrix_scale(&modelview, output->zoom.magnification, output->zoom.magnification, 1.0);
2322                 weston_matrix_multiply(&output->matrix, &modelview);
2323         }
2324
2325         output->dirty = 0;
2326 }
2327
2328 WL_EXPORT void
2329 weston_output_move(struct weston_output *output, int x, int y)
2330 {
2331         output->x = x;
2332         output->y = y;
2333
2334         pixman_region32_init(&output->previous_damage);
2335         pixman_region32_init_rect(&output->region, x, y,
2336                                   output->current->width,
2337                                   output->current->height);
2338 }
2339
2340 WL_EXPORT void
2341 weston_output_init(struct weston_output *output, struct weston_compositor *c,
2342                    int x, int y, int width, int height, uint32_t flags)
2343 {
2344         output->compositor = c;
2345         output->x = x;
2346         output->y = y;
2347         output->border.top = 0;
2348         output->border.bottom = 0;
2349         output->border.left = 0;
2350         output->border.right = 0;
2351         output->mm_width = width;
2352         output->mm_height = height;
2353         output->dirty = 1;
2354
2355         output->zoom.active = 0;
2356         output->zoom.increment = 0.05;
2357         output->zoom.level = 1.0;
2358         output->zoom.magnification = 1.0;
2359         output->zoom.trans_x = 0.0;
2360         output->zoom.trans_y = 0.0;
2361
2362         output->flags = flags;
2363         weston_output_move(output, x, y);
2364         weston_output_damage(output);
2365
2366         wl_list_init(&output->frame_callback_list);
2367
2368         output->id = ffs(~output->compositor->output_id_pool) - 1;
2369         output->compositor->output_id_pool |= 1 << output->id;
2370
2371         output->global =
2372                 wl_display_add_global(c->wl_display, &wl_output_interface,
2373                                       output, bind_output);
2374 }
2375
2376 static void
2377 compositor_bind(struct wl_client *client,
2378                 void *data, uint32_t version, uint32_t id)
2379 {
2380         struct weston_compositor *compositor = data;
2381
2382         wl_client_add_object(client, &wl_compositor_interface,
2383                              &compositor_interface, id, compositor);
2384 }
2385
2386 WL_EXPORT int
2387 weston_compositor_init(struct weston_compositor *ec, struct wl_display *display)
2388 {
2389         struct wl_event_loop *loop;
2390         const char *extensions;
2391
2392         ec->wl_display = display;
2393         wl_signal_init(&ec->destroy_signal);
2394         wl_signal_init(&ec->activate_signal);
2395         wl_signal_init(&ec->lock_signal);
2396         wl_signal_init(&ec->unlock_signal);
2397         ec->launcher_sock = weston_environment_get_fd("WESTON_LAUNCHER_SOCK");
2398
2399         ec->output_id_pool = 0;
2400
2401         if (!wl_display_add_global(display, &wl_compositor_interface,
2402                                    ec, compositor_bind))
2403                 return -1;
2404
2405         wl_display_init_shm(display);
2406
2407         ec->image_target_texture_2d =
2408                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
2409         ec->image_target_renderbuffer_storage = (void *)
2410                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
2411         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
2412         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
2413         ec->bind_display =
2414                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
2415         ec->unbind_display =
2416                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
2417
2418         extensions = (const char *) glGetString(GL_EXTENSIONS);
2419         if (!extensions) {
2420                 fprintf(stderr, "Retrieving GL extension string failed.\n");
2421                 return -1;
2422         }
2423
2424         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
2425                 fprintf(stderr,
2426                         "GL_EXT_texture_format_BGRA8888 not available\n");
2427                 return -1;
2428         }
2429
2430         if (strstr(extensions, "GL_EXT_read_format_bgra"))
2431                 ec->read_format = GL_BGRA_EXT;
2432         else
2433                 ec->read_format = GL_RGBA;
2434
2435         if (strstr(extensions, "GL_EXT_unpack_subimage"))
2436                 ec->has_unpack_subimage = 1;
2437
2438         extensions =
2439                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
2440         if (!extensions) {
2441                 fprintf(stderr, "Retrieving EGL extension string failed.\n");
2442                 return -1;
2443         }
2444
2445         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
2446                 ec->has_bind_display = 1;
2447         if (ec->has_bind_display)
2448                 ec->bind_display(ec->display, ec->wl_display);
2449
2450         wl_list_init(&ec->surface_list);
2451         wl_list_init(&ec->layer_list);
2452         wl_list_init(&ec->input_device_list);
2453         wl_list_init(&ec->output_list);
2454         wl_list_init(&ec->binding_list);
2455         wl_list_init(&ec->animation_list);
2456         weston_spring_init(&ec->fade.spring, 30.0, 1.0, 1.0);
2457         ec->fade.animation.frame = fade_frame;
2458         wl_list_init(&ec->fade.animation.link);
2459
2460         weston_layer_init(&ec->fade_layer, &ec->layer_list);
2461         weston_layer_init(&ec->cursor_layer, &ec->fade_layer.link);
2462
2463         screenshooter_create(ec);
2464
2465         ec->ping_handler = NULL;
2466
2467         wl_data_device_manager_init(ec->wl_display);
2468
2469         glActiveTexture(GL_TEXTURE0);
2470
2471         if (weston_shader_init(&ec->texture_shader,
2472                              vertex_shader, texture_fragment_shader) < 0)
2473                 return -1;
2474         if (weston_shader_init(&ec->solid_shader,
2475                              vertex_shader, solid_fragment_shader) < 0)
2476                 return -1;
2477
2478         loop = wl_display_get_event_loop(ec->wl_display);
2479         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
2480         wl_event_source_timer_update(ec->idle_source, ec->idle_time * 1000);
2481
2482         ec->input_loop = wl_event_loop_create();
2483
2484         weston_compositor_schedule_repaint(ec);
2485
2486         return 0;
2487 }
2488
2489 WL_EXPORT void
2490 weston_compositor_shutdown(struct weston_compositor *ec)
2491 {
2492         struct weston_output *output, *next;
2493
2494         wl_event_source_remove(ec->idle_source);
2495         if (ec->input_loop_source)
2496                 wl_event_source_remove(ec->input_loop_source);
2497
2498         /* Destroy all outputs associated with this compositor */
2499         wl_list_for_each_safe(output, next, &ec->output_list, link)
2500                 output->destroy(output);
2501
2502         weston_binding_list_destroy_all(&ec->binding_list);
2503
2504         wl_array_release(&ec->vertices);
2505         wl_array_release(&ec->indices);
2506
2507         wl_event_loop_destroy(ec->input_loop);
2508 }
2509
2510 static int on_term_signal(int signal_number, void *data)
2511 {
2512         struct wl_display *display = data;
2513
2514         fprintf(stderr, "caught signal %d\n", signal_number);
2515         wl_display_terminate(display);
2516
2517         return 1;
2518 }
2519
2520 static void
2521 on_segv_signal(int s, siginfo_t *siginfo, void *context)
2522 {
2523         void *buffer[32];
2524         int i, count;
2525         Dl_info info;
2526
2527         fprintf(stderr, "caught segv\n");
2528
2529         count = backtrace(buffer, ARRAY_LENGTH(buffer));
2530         for (i = 0; i < count; i++) {
2531                 dladdr(buffer[i], &info);
2532                 fprintf(stderr, "  [%016lx]  %s  (%s)\n",
2533                         (long) buffer[i],
2534                         info.dli_sname ? info.dli_sname : "--",
2535                         info.dli_fname);
2536         }
2537
2538         longjmp(segv_jmp_buf, 1);
2539 }
2540
2541
2542 static void *
2543 load_module(const char *name, const char *entrypoint, void **handle)
2544 {
2545         char path[PATH_MAX];
2546         void *module, *init;
2547
2548         if (name[0] != '/')
2549                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
2550         else
2551                 snprintf(path, sizeof path, "%s", name);
2552
2553         module = dlopen(path, RTLD_LAZY);
2554         if (!module) {
2555                 fprintf(stderr,
2556                         "failed to load module: %s\n", dlerror());
2557                 return NULL;
2558         }
2559
2560         init = dlsym(module, entrypoint);
2561         if (!init) {
2562                 fprintf(stderr,
2563                         "failed to lookup init function: %s\n", dlerror());
2564                 return NULL;
2565         }
2566
2567         return init;
2568 }
2569
2570 int main(int argc, char *argv[])
2571 {
2572         struct wl_display *display;
2573         struct weston_compositor *ec;
2574         struct wl_event_source *signals[4];
2575         struct wl_event_loop *loop;
2576         struct sigaction segv_action;
2577         void *shell_module, *backend_module, *xserver_module;
2578         int (*shell_init)(struct weston_compositor *ec);
2579         int (*xserver_init)(struct weston_compositor *ec);
2580         struct weston_compositor
2581                 *(*backend_init)(struct wl_display *display,
2582                                  int argc, char *argv[]);
2583         int i;
2584         char *backend = NULL;
2585         char *shell = NULL;
2586         int32_t idle_time = 300;
2587         int32_t xserver;
2588         char *socket_name = NULL;
2589         char *config_file;
2590
2591         const struct config_key shell_config_keys[] = {
2592                 { "type", CONFIG_KEY_STRING, &shell },
2593         };
2594
2595         const struct config_section cs[] = {
2596                 { "shell",
2597                   shell_config_keys, ARRAY_LENGTH(shell_config_keys) },
2598         };
2599
2600         const struct weston_option core_options[] = {
2601                 { WESTON_OPTION_STRING, "backend", 'B', &backend },
2602                 { WESTON_OPTION_STRING, "socket", 'S', &socket_name },
2603                 { WESTON_OPTION_INTEGER, "idle-time", 'i', &idle_time },
2604                 { WESTON_OPTION_BOOLEAN, "xserver", 0, &xserver },
2605         };
2606
2607         argc = parse_options(core_options,
2608                              ARRAY_LENGTH(core_options), argc, argv);
2609
2610         display = wl_display_create();
2611
2612         loop = wl_display_get_event_loop(display);
2613         signals[0] = wl_event_loop_add_signal(loop, SIGTERM, on_term_signal,
2614                                               display);
2615         signals[1] = wl_event_loop_add_signal(loop, SIGINT, on_term_signal,
2616                                               display);
2617         signals[2] = wl_event_loop_add_signal(loop, SIGQUIT, on_term_signal,
2618                                               display);
2619
2620         wl_list_init(&child_process_list);
2621         signals[3] = wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler,
2622                                               NULL);
2623
2624         segv_action.sa_flags = SA_SIGINFO | SA_RESETHAND;
2625         segv_action.sa_sigaction = on_segv_signal;
2626         sigemptyset(&segv_action.sa_mask);
2627         sigaction(SIGSEGV, &segv_action, NULL);
2628
2629         if (!backend) {
2630                 if (getenv("WAYLAND_DISPLAY"))
2631                         backend = "wayland-backend.so";
2632                 else if (getenv("DISPLAY"))
2633                         backend = "x11-backend.so";
2634                 else if (getenv("OPENWFD"))
2635                         backend = "openwfd-backend.so";
2636                 else
2637                         backend = "drm-backend.so";
2638         }
2639
2640         config_file = config_file_path("weston.ini");
2641         parse_config_file(config_file, cs, ARRAY_LENGTH(cs), shell);
2642         free(config_file);
2643
2644         if (!shell)
2645                 shell = "desktop-shell.so";
2646
2647         backend_init = load_module(backend, "backend_init", &backend_module);
2648         if (!backend_init)
2649                 exit(EXIT_FAILURE);
2650
2651         shell_init = load_module(shell, "shell_init", &shell_module);
2652         if (!shell_init)
2653                 exit(EXIT_FAILURE);
2654
2655         ec = backend_init(display, argc, argv);
2656         if (ec == NULL) {
2657                 fprintf(stderr, "failed to create compositor\n");
2658                 exit(EXIT_FAILURE);
2659         }
2660
2661         for (i = 1; argv[i]; i++)
2662                 fprintf(stderr, "unhandled option: %s\n", argv[i]);
2663         if (argv[1])
2664                 exit(EXIT_FAILURE);
2665
2666         ec->option_idle_time = idle_time;
2667         ec->idle_time = idle_time;
2668
2669         xserver_init = NULL;
2670         if (xserver)
2671                 xserver_init = load_module("xserver-launcher.so",
2672                                            "weston_xserver_init",
2673                                            &xserver_module);
2674         if (xserver_init)
2675                 xserver_init(ec);
2676
2677         if (shell_init(ec) < 0)
2678                 exit(EXIT_FAILURE);
2679
2680         if (wl_display_add_socket(display, socket_name)) {
2681                 fprintf(stderr, "failed to add socket: %m\n");
2682                 exit(EXIT_FAILURE);
2683         }
2684
2685         weston_compositor_dpms_on(ec);
2686         weston_compositor_wake(ec);
2687         if (setjmp(segv_jmp_buf) == 0)
2688                 wl_display_run(display);
2689
2690         /* prevent further rendering while shutting down */
2691         ec->state = WESTON_COMPOSITOR_SLEEPING;
2692
2693         wl_signal_emit(&ec->destroy_signal, ec);
2694
2695         if (ec->has_bind_display)
2696                 ec->unbind_display(ec->display, display);
2697
2698         for (i = ARRAY_LENGTH(signals); i;)
2699                 wl_event_source_remove(signals[--i]);
2700
2701         ec->destroy(ec);
2702         wl_display_destroy(display);
2703
2704         return 0;
2705 }