compositor/compositor.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <stdint.h>
  27 #include <limits.h>
  28 #include <stdarg.h>
  29 #include <assert.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/wait.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <math.h>
  35 #include <linux/input.h>
  36 #include <dlfcn.h>
  37 #include <getopt.h>
  38 #include <signal.h>
  39
  40 #include "wayland-server.h"
  41 #include "compositor.h"
  42
  43 /* The plan here is to generate a random anonymous socket name and
  44  * advertise that through a service on the session dbus.
  45  */
  46 static const char *option_socket_name = NULL;
  47 static const char *option_background = "background.png";
  48 static int option_idle_time = 300;
  49
  50 static struct wl_list child_process_list;
  51
  52 static int
  53 sigchld_handler(int signal_number, void *data)
  54 {
  55         struct wlsc_process *p;
  56         int status;
  57         pid_t pid;
  58
  59         pid = wait(&status);
  60         wl_list_for_each(p, &child_process_list, link) {
  61                 if (p->pid == pid)
  62                         break;
  63         }
  64
  65         if (&p->link == &child_process_list) {
  66                 fprintf(stderr, "unknown child process exited\n");
  67                 return 1;
  68         }
  69
  70         wl_list_remove(&p->link);
  71         p->cleanup(p, status);
  72
  73         return 1;
  74 }
  75
  76 WL_EXPORT void
  77 wlsc_watch_process(struct wlsc_process *process)
  78 {
  79         wl_list_insert(&child_process_list, &process->link);
  80 }
  81
  82 WL_EXPORT void
  83 wlsc_matrix_init(struct wlsc_matrix *matrix)
  84 {
  85         static const struct wlsc_matrix identity = {
  86                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  87         };
  88
  89         memcpy(matrix, &identity, sizeof identity);
  90 }
  91
  92 static void
  93 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  94 {
  95         struct wlsc_matrix tmp;
  96         const GLfloat *row, *column;
  97         div_t d;
  98         int i, j;
  99
 100         for (i = 0; i < 16; i++) {
 101                 tmp.d[i] = 0;
 102                 d = div(i, 4);
 103                 row = m->d + d.quot * 4;
 104                 column = n->d + d.rem;
 105                 for (j = 0; j < 4; j++)
 106                         tmp.d[i] += row[j] * column[j * 4];
 107         }
 108         memcpy(m, &tmp, sizeof tmp);
 109 }
 110
 111 WL_EXPORT void
 112 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 113 {
 114         struct wlsc_matrix translate = {
 115                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
 116         };
 117
 118         wlsc_matrix_multiply(matrix, &translate);
 119 }
 120
 121 WL_EXPORT void
 122 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 123 {
 124         struct wlsc_matrix scale = {
 125                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
 126         };
 127
 128         wlsc_matrix_multiply(matrix, &scale);
 129 }
 130
 131 static void
 132 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 133 {
 134         int i, j;
 135         struct wlsc_vector t;
 136
 137         for (i = 0; i < 4; i++) {
 138                 t.f[i] = 0;
 139                 for (j = 0; j < 4; j++)
 140                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 141         }
 142
 143         *v = t;
 144 }
 145
 146 WL_EXPORT void
 147 wlsc_spring_init(struct wlsc_spring *spring,
 148                  double k, double current, double target)
 149 {
 150         spring->k = k;
 151         spring->friction = 100.0;
 152         spring->current = current;
 153         spring->previous = current;
 154         spring->target = target;
 155 }
 156
 157 WL_EXPORT void
 158 wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec)
 159 {
 160         double force, v, current, step;
 161
 162         step = (msec - spring->timestamp) / 300.0;
 163         spring->timestamp = msec;
 164
 165         current = spring->current;
 166         v = current - spring->previous;
 167         force = spring->k * (spring->target - current) / 10.0 +
 168                 (spring->previous - current) - v * spring->friction;
 169
 170         spring->current =
 171                 current + (current - spring->previous) + force * step * step;
 172         spring->previous = current;
 173
 174 #if 0
 175         if (spring->current >= 1.0) {
 176 #ifdef TWEENER_BOUNCE
 177                 spring->current = 2.0 - spring->current;
 178                 spring->previous = 2.0 - spring->previous;
 179 #else
 180                 spring->current = 1.0;
 181                 spring->previous = 1.0;
 182 #endif
 183         }
 184
 185         if (spring->current <= 0.0) {
 186                 spring->current = 0.0;
 187                 spring->previous = 0.0;
 188         }
 189 #endif
 190 }
 191
 192 WL_EXPORT int
 193 wlsc_spring_done(struct wlsc_spring *spring)
 194 {
 195         return fabs(spring->previous - spring->target) < 0.0002 &&
 196                 fabs(spring->current - spring->target) < 0.0002;
 197 }
 198
 199 static void
 200 surface_handle_buffer_destroy(struct wl_listener *listener,
 201                               struct wl_resource *resource, uint32_t time)
 202 {
 203         struct wlsc_surface *es = container_of(listener, struct wlsc_surface,
 204                                                buffer_destroy_listener);
 205         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 206
 207         if (es->buffer == buffer)
 208                 es->buffer = NULL;
 209 }
 210
 211 static void
 212 output_handle_scanout_buffer_destroy(struct wl_listener *listener,
 213                                      struct wl_resource *resource,
 214                                      uint32_t time)
 215 {
 216         struct wlsc_output *output =
 217                 container_of(listener, struct wlsc_output,
 218                              scanout_buffer_destroy_listener);
 219         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 220
 221         if (output->scanout_buffer == buffer)
 222                 output->scanout_buffer = NULL;
 223 }
 224
 225 WL_EXPORT struct wlsc_surface *
 226 wlsc_surface_create(struct wlsc_compositor *compositor,
 227                     int32_t x, int32_t y, int32_t width, int32_t height)
 228 {
 229         struct wlsc_surface *surface;
 230
 231         surface = malloc(sizeof *surface);
 232         if (surface == NULL)
 233                 return NULL;
 234
 235         wl_list_init(&surface->link);
 236         wl_list_init(&surface->buffer_link);
 237         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 238
 239         glGenTextures(1, &surface->texture);
 240         glBindTexture(GL_TEXTURE_2D, surface->texture);
 241         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 242         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 243
 244         surface->surface.resource.client = NULL;
 245
 246         surface->compositor = compositor;
 247         surface->visual = NULL;
 248         surface->image = EGL_NO_IMAGE_KHR;
 249         surface->saved_texture = 0;
 250         surface->x = x;
 251         surface->y = y;
 252         surface->width = width;
 253         surface->height = height;
 254
 255         surface->buffer = NULL;
 256
 257         pixman_region32_init(&surface->damage);
 258         pixman_region32_init(&surface->opaque);
 259
 260         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 261         wl_list_init(&surface->buffer_destroy_listener.link);
 262
 263         surface->transform = NULL;
 264
 265         return surface;
 266 }
 267
 268 WL_EXPORT void
 269 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 270                               int32_t x, int32_t y,
 271                               int32_t width, int32_t height)
 272 {
 273         struct wlsc_compositor *compositor = surface->compositor;
 274
 275         pixman_region32_union_rect(&surface->damage,
 276                                    &surface->damage,
 277                                    surface->x + x, surface->y + y,
 278                                    width, height);
 279         wlsc_compositor_schedule_repaint(compositor);
 280 }
 281
 282 WL_EXPORT void
 283 wlsc_surface_damage(struct wlsc_surface *surface)
 284 {
 285         wlsc_surface_damage_rectangle(surface, 0, 0,
 286                                       surface->width, surface->height);
 287 }
 288
 289 WL_EXPORT void
 290 wlsc_surface_damage_below(struct wlsc_surface *surface)
 291 {
 292         struct wlsc_surface *below;
 293
 294         if (surface->link.next == &surface->compositor->surface_list)
 295                 return;
 296
 297         below = container_of(surface->link.next, struct wlsc_surface, link);
 298
 299         pixman_region32_union_rect(&below->damage,
 300                                    &below->damage,
 301                                    surface->x, surface->y,
 302                                    surface->width, surface->height);
 303         wlsc_compositor_schedule_repaint(surface->compositor);
 304 }
 305
 306 WL_EXPORT void
 307 wlsc_surface_configure(struct wlsc_surface *surface,
 308                        int x, int y, int width, int height)
 309 {
 310         struct wlsc_compositor *compositor = surface->compositor;
 311
 312         wlsc_surface_damage_below(surface);
 313
 314         surface->x = x;
 315         surface->y = y;
 316         surface->width = width;
 317         surface->height = height;
 318
 319         wlsc_surface_assign_output(surface);
 320         wlsc_surface_damage(surface);
 321
 322         pixman_region32_fini(&surface->opaque);
 323         if (surface->visual == &compositor->compositor.rgb_visual)
 324                 pixman_region32_init_rect(&surface->opaque,
 325                                           surface->x, surface->y,
 326                                           surface->width, surface->height);
 327         else
 328                 pixman_region32_init(&surface->opaque);
 329 }
 330
 331 WL_EXPORT uint32_t
 332 wlsc_compositor_get_time(void)
 333 {
 334         struct timeval tv;
 335
 336         gettimeofday(&tv, NULL);
 337
 338         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 339 }
 340
 341 static void
 342 destroy_surface(struct wl_resource *resource)
 343 {
 344         struct wlsc_surface *surface =
 345                 container_of(resource, struct wlsc_surface, surface.resource);
 346         struct wlsc_compositor *compositor = surface->compositor;
 347
 348         wlsc_surface_damage_below(surface);
 349
 350         wl_list_remove(&surface->link);
 351         if (surface->saved_texture == 0)
 352                 glDeleteTextures(1, &surface->texture);
 353         else
 354                 glDeleteTextures(1, &surface->saved_texture);
 355
 356         if (surface->buffer)
 357                 wl_list_remove(&surface->buffer_destroy_listener.link);
 358
 359         if (surface->image != EGL_NO_IMAGE_KHR)
 360                 compositor->destroy_image(compositor->display,
 361                                           surface->image);
 362
 363         wl_list_remove(&surface->buffer_link);
 364
 365         free(surface);
 366 }
 367
 368 static void
 369 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 370 {
 371         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 372         struct wlsc_compositor *ec = es->compositor;
 373         struct wl_list *surfaces_attached_to;
 374
 375         if (es->saved_texture != 0)
 376                 es->texture = es->saved_texture;
 377
 378         glBindTexture(GL_TEXTURE_2D, es->texture);
 379
 380         if (wl_buffer_is_shm(buffer)) {
 381                 /* Unbind any EGLImage texture that may be bound, so we don't
 382                  * overwrite it.*/
 383                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 384                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 385                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 386                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 387                              es->pitch, buffer->height, 0,
 388                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 389                              wl_shm_buffer_get_data(buffer));
 390                 es->visual = buffer->visual;
 391
 392                 surfaces_attached_to = buffer->user_data;
 393
 394                 wl_list_remove(&es->buffer_link);
 395                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 396         } else {
 397                 if (es->image != EGL_NO_IMAGE_KHR)
 398                         ec->destroy_image(ec->display, es->image);
 399                 es->image = ec->create_image(ec->display, NULL,
 400                                              EGL_WAYLAND_BUFFER_WL,
 401                                              buffer, NULL);
 402
 403                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 404                 es->visual = buffer->visual;
 405                 es->pitch = es->width;
 406         }
 407 }
 408
 409 static void
 410 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 411 {
 412         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 413         struct wlsc_compositor *ec = es->compositor;
 414
 415         es->pitch = es->width;
 416         es->image = sprite->image;
 417         if (sprite->image != EGL_NO_IMAGE_KHR) {
 418                 glBindTexture(GL_TEXTURE_2D, es->texture);
 419                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 420         } else {
 421                 if (es->saved_texture == 0)
 422                         es->saved_texture = es->texture;
 423                 es->texture = sprite->texture;
 424         }
 425
 426         es->visual = sprite->visual;
 427
 428         if (es->buffer)
 429                 es->buffer = NULL;
 430 }
 431
 432 enum sprite_usage {
 433         SPRITE_USE_CURSOR = (1 << 0),
 434 };
 435
 436 static struct wlsc_sprite *
 437 create_sprite_from_png(struct wlsc_compositor *ec,
 438                        const char *filename, uint32_t usage)
 439 {
 440         uint32_t *pixels;
 441         struct wlsc_sprite *sprite;
 442         int32_t width, height;
 443         uint32_t stride;
 444
 445         pixels = wlsc_load_image(filename, &width, &height, &stride);
 446         if (pixels == NULL)
 447                 return NULL;
 448
 449         sprite = malloc(sizeof *sprite);
 450         if (sprite == NULL) {
 451                 free(pixels);
 452                 return NULL;
 453         }
 454
 455         sprite->visual = &ec->compositor.premultiplied_argb_visual;
 456         sprite->width = width;
 457         sprite->height = height;
 458         sprite->image = EGL_NO_IMAGE_KHR;
 459
 460         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 461                 sprite->image = ec->create_cursor_image(ec, width, height);
 462
 463         glGenTextures(1, &sprite->texture);
 464         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 465         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 466         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 467         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 468         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 469
 470         if (sprite->image != EGL_NO_IMAGE_KHR) {
 471                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 472                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 473                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 474         } else {
 475                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 476                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 477         }
 478
 479         free(pixels);
 480
 481         return sprite;
 482 }
 483
 484 static const struct {
 485         const char *filename;
 486         int hotspot_x, hotspot_y;
 487 } pointer_images[] = {
 488         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 489         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 490         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 491         { DATADIR "/wayland/grabbing.png",              20, 17 },
 492         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 493         { DATADIR "/wayland/left_side.png",             10, 20 },
 494         { DATADIR "/wayland/right_side.png",            30, 19 },
 495         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 496         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 497         { DATADIR "/wayland/top_side.png",              18,  8 },
 498         { DATADIR "/wayland/xterm.png",                 15, 15 }
 499 };
 500
 501 static void
 502 create_pointer_images(struct wlsc_compositor *ec)
 503 {
 504         int i, count;
 505
 506         count = ARRAY_LENGTH(pointer_images);
 507         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 508         for (i = 0; i < count; i++) {
 509                 ec->pointer_sprites[i] =
 510                         create_sprite_from_png(ec,
 511                                                pointer_images[i].filename,
 512                                                SPRITE_USE_CURSOR);
 513         }
 514 }
 515
 516 static struct wlsc_surface *
 517 background_create(struct wlsc_output *output, const char *filename)
 518 {
 519         struct wlsc_surface *background;
 520         struct wlsc_sprite *sprite;
 521
 522         background = wlsc_surface_create(output->compositor,
 523                                          output->x, output->y,
 524                                          output->current->width,
 525                                          output->current->height);
 526         if (background == NULL)
 527                 return NULL;
 528
 529         sprite = create_sprite_from_png(output->compositor, filename, 0);
 530         if (sprite == NULL) {
 531                 free(background);
 532                 return NULL;
 533         }
 534
 535         wlsc_sprite_attach(sprite, &background->surface);
 536
 537         return background;
 538 }
 539
 540 static int
 541 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 542 {
 543         struct wlsc_compositor *ec = es->compositor;
 544         GLfloat *v, inv_width, inv_height;
 545         pixman_box32_t *rectangles;
 546         unsigned int *p;
 547         int i, n;
 548
 549         rectangles = pixman_region32_rectangles(region, &n);
 550         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 551         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 552         inv_width = 1.0 / es->pitch;
 553         inv_height = 1.0 / es->height;
 554
 555         for (i = 0; i < n; i++, v += 16, p += 6) {
 556                 v[ 0] = rectangles[i].x1;
 557                 v[ 1] = rectangles[i].y1;
 558                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 559                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 560
 561                 v[ 4] = rectangles[i].x1;
 562                 v[ 5] = rectangles[i].y2;
 563                 v[ 6] = v[ 2];
 564                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 565
 566                 v[ 8] = rectangles[i].x2;
 567                 v[ 9] = rectangles[i].y1;
 568                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 569                 v[11] = v[ 3];
 570
 571                 v[12] = rectangles[i].x2;
 572                 v[13] = rectangles[i].y2;
 573                 v[14] = v[10];
 574                 v[15] = v[ 7];
 575
 576                 p[0] = i * 4 + 0;
 577                 p[1] = i * 4 + 1;
 578                 p[2] = i * 4 + 2;
 579                 p[3] = i * 4 + 2;
 580                 p[4] = i * 4 + 1;
 581                 p[5] = i * 4 + 3;
 582         }
 583
 584         return n;
 585 }
 586
 587 static void
 588 transform_vertex(struct wlsc_surface *surface,
 589                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 590 {
 591         struct wlsc_vector t;
 592
 593         t.f[0] = x;
 594         t.f[1] = y;
 595         t.f[2] = 0.0;
 596         t.f[3] = 1.0;
 597
 598         wlsc_matrix_transform(&surface->transform->matrix, &t);
 599
 600         r[ 0] = t.f[0];
 601         r[ 1] = t.f[1];
 602         r[ 2] = u;
 603         r[ 3] = v;
 604 }
 605
 606 static int
 607 texture_transformed_surface(struct wlsc_surface *es)
 608 {
 609         struct wlsc_compositor *ec = es->compositor;
 610         GLfloat *v;
 611         unsigned int *p;
 612
 613         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 614         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 615
 616         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 617         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 618         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 619         transform_vertex(es, es->x + es->width, es->y + es->height,
 620                          1.0, 1.0, &v[12]);
 621
 622         p[0] = 0;
 623         p[1] = 1;
 624         p[2] = 2;
 625         p[3] = 2;
 626         p[4] = 1;
 627         p[5] = 3;
 628
 629         return 1;
 630 }
 631
 632 static void
 633 wlsc_surface_draw(struct wlsc_surface *es,
 634                   struct wlsc_output *output, pixman_region32_t *clip)
 635 {
 636         struct wlsc_compositor *ec = es->compositor;
 637         GLfloat *v;
 638         pixman_region32_t repaint;
 639         GLint filter;
 640         int n;
 641
 642         pixman_region32_init_rect(&repaint,
 643                                   es->x, es->y, es->width, es->height);
 644         pixman_region32_intersect(&repaint, &repaint, clip);
 645         if (!pixman_region32_not_empty(&repaint))
 646                 return;
 647
 648         if (es->visual == &ec->compositor.argb_visual) {
 649                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 650                 glEnable(GL_BLEND);
 651         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 652                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 653                 glEnable(GL_BLEND);
 654         } else {
 655                 glDisable(GL_BLEND);
 656         }
 657
 658         if (es->transform == NULL) {
 659                 filter = GL_NEAREST;
 660                 n = texture_region(es, &repaint);
 661         } else {
 662                 filter = GL_LINEAR;
 663                 n = texture_transformed_surface(es);
 664         }
 665
 666         glBindTexture(GL_TEXTURE_2D, es->texture);
 667         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 668         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 669
 670         v = ec->vertices.data;
 671         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 672         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 673         glEnableVertexAttribArray(0);
 674         glEnableVertexAttribArray(1);
 675         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 676
 677         ec->vertices.size = 0;
 678         ec->indices.size = 0;
 679         pixman_region32_fini(&repaint);
 680 }
 681
 682 static void
 683 wlsc_surface_raise(struct wlsc_surface *surface)
 684 {
 685         struct wlsc_compositor *compositor = surface->compositor;
 686
 687         wl_list_remove(&surface->link);
 688         wl_list_insert(&compositor->surface_list, &surface->link);
 689         wlsc_surface_damage(surface);
 690 }
 691
 692 WL_EXPORT void
 693 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 694 {
 695         struct wlsc_output *output;
 696
 697         wl_list_for_each(output, &compositor->output_list, link)
 698                 wlsc_output_damage(output);
 699 }
 700
 701 static inline void
 702 wlsc_buffer_post_release(struct wl_buffer *buffer)
 703 {
 704         if (buffer == NULL || --buffer->busy_count > 0)
 705                 return;
 706
 707         assert(buffer->resource.client != NULL);
 708         wl_resource_post_event(&buffer->resource, WL_BUFFER_RELEASE);
 709 }
 710
 711 WL_EXPORT void
 712 wlsc_output_damage(struct wlsc_output *output)
 713 {
 714         struct wlsc_compositor *compositor = output->compositor;
 715
 716         pixman_region32_union(&compositor->damage,
 717                               &compositor->damage, &output->region);
 718         wlsc_compositor_schedule_repaint(compositor);
 719 }
 720
 721 static void
 722 fade_frame(struct wlsc_animation *animation,
 723            struct wlsc_output *output, uint32_t msecs)
 724 {
 725         struct wlsc_compositor *compositor =
 726                 container_of(animation,
 727                              struct wlsc_compositor, fade.animation);
 728
 729         wlsc_spring_update(&compositor->fade.spring, msecs);
 730         if (wlsc_spring_done(&compositor->fade.spring)) {
 731                 if (compositor->fade.spring.current > 0.999) {
 732                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 733                         compositor->shell->lock(compositor->shell);
 734                 }
 735                 compositor->fade.spring.current =
 736                         compositor->fade.spring.target;
 737                 wl_list_remove(&animation->link);
 738                 wl_list_init(&animation->link);
 739         }
 740
 741         wlsc_output_damage(output);
 742 }
 743
 744 static void
 745 fade_output(struct wlsc_output *output,
 746             GLfloat tint, pixman_region32_t *region)
 747 {
 748         struct wlsc_compositor *compositor = output->compositor;
 749         struct wlsc_surface surface;
 750         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 751
 752         surface.compositor = compositor;
 753         surface.x = output->x;
 754         surface.y = output->y;
 755         surface.pitch = output->current->width;
 756         surface.width = output->current->width;
 757         surface.height = output->current->height;
 758         surface.texture = GL_NONE;
 759         surface.transform = NULL;
 760
 761         if (tint <= 1.0)
 762                 surface.visual =
 763                         &compositor->compositor.premultiplied_argb_visual;
 764         else
 765                 surface.visual = &compositor->compositor.rgb_visual;
 766
 767         glUseProgram(compositor->solid_shader.program);
 768         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 769                            1, GL_FALSE, output->matrix.d);
 770         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 771         wlsc_surface_draw(&surface, output, region);
 772 }
 773
 774 static void
 775 wlsc_output_set_cursor(struct wlsc_output *output,
 776                        struct wl_input_device *dev, int force_sw)
 777 {
 778         struct wlsc_compositor *ec = output->compositor;
 779         struct wlsc_input_device *device = (struct wlsc_input_device *) dev;
 780         pixman_region32_t cursor_region;
 781         int use_hardware_cursor = 1, prior_was_hardware;
 782
 783         pixman_region32_init_rect(&cursor_region,
 784                                   device->sprite->x, device->sprite->y,
 785                                   device->sprite->width,
 786                                   device->sprite->height);
 787
 788         pixman_region32_intersect(&cursor_region, &cursor_region, &output->region);
 789
 790         if (!pixman_region32_not_empty(&cursor_region)) {
 791                 output->set_hardware_cursor(output, NULL);
 792                 goto out;
 793         }
 794
 795         prior_was_hardware = wl_list_empty(&device->sprite->link);
 796         if (force_sw || output->set_hardware_cursor(output, device) < 0) {
 797                 if (prior_was_hardware)
 798                         wlsc_surface_damage(device->sprite);
 799                 use_hardware_cursor = 0;
 800         } else if (!prior_was_hardware) {
 801                 wlsc_surface_damage_below(device->sprite);
 802         }
 803
 804         /* Remove always to be on top. */
 805         wl_list_remove(&device->sprite->link);
 806         if (!use_hardware_cursor)
 807                 wl_list_insert(&ec->surface_list, &device->sprite->link);
 808         else
 809                 wl_list_init(&device->sprite->link);
 810
 811 out:
 812         pixman_region32_fini(&cursor_region);
 813 }
 814
 815 static void
 816 wlsc_output_repaint(struct wlsc_output *output)
 817 {
 818         struct wlsc_compositor *ec = output->compositor;
 819         struct wlsc_surface *es;
 820         pixman_region32_t opaque, new_damage, total_damage, repaint;
 821
 822         output->prepare_render(output);
 823
 824         glViewport(0, 0, output->current->width, output->current->height);
 825
 826         glUseProgram(ec->texture_shader.program);
 827         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 828                            1, GL_FALSE, output->matrix.d);
 829         glUniform1i(ec->texture_shader.tex_uniform, 0);
 830
 831         wlsc_output_set_cursor(output, ec->input_device,
 832                                !(ec->focus && ec->fade.spring.current < 0.001));
 833
 834         pixman_region32_init(&new_damage);
 835         pixman_region32_copy(&new_damage, &ec->damage);
 836         pixman_region32_init(&opaque);
 837
 838         wl_list_for_each(es, &ec->surface_list, link) {
 839                 pixman_region32_subtract(&es->damage, &es->damage, &opaque);
 840                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 841                 pixman_region32_union(&opaque, &opaque, &es->opaque);
 842         }
 843
 844         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 845
 846         pixman_region32_init(&total_damage);
 847         pixman_region32_union(&total_damage, &new_damage,
 848                               &output->previous_damage);
 849         pixman_region32_intersect(&output->previous_damage,
 850                                   &new_damage, &output->region);
 851
 852         pixman_region32_fini(&opaque);
 853         pixman_region32_fini(&new_damage);
 854
 855         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 856
 857         if (es->visual == &ec->compositor.rgb_visual &&
 858             output->prepare_scanout_surface(output, es) == 0) {
 859                 /* We're drawing nothing now,
 860                  * draw the damaged regions later. */
 861                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 862
 863                 output->scanout_buffer = es->buffer;
 864                 output->scanout_buffer->busy_count++;
 865
 866                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 867                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 868                                &output->scanout_buffer_destroy_listener.link);
 869
 870                 return;
 871         }
 872
 873         if (es->fullscreen_output == output) {
 874                 if (es->width < output->current->width ||
 875                     es->height < output->current->height)
 876                         glClear(GL_COLOR_BUFFER_BIT);
 877                 wlsc_surface_draw(es, output, &total_damage);
 878         } else {
 879                 wl_list_for_each(es, &ec->surface_list, link) {
 880                         pixman_region32_copy(&es->damage, &total_damage);
 881                         pixman_region32_subtract(&total_damage, &total_damage, &es->opaque);
 882                 }
 883
 884                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 885                         pixman_region32_init(&repaint);
 886                         pixman_region32_intersect(&repaint, &output->region,
 887                                                   &es->damage);
 888                         wlsc_surface_draw(es, output, &repaint);
 889                         pixman_region32_subtract(&es->damage,
 890                                                  &es->damage, &output->region);
 891                 }
 892         }
 893
 894         if (ec->fade.spring.current > 0.001)
 895                 fade_output(output, ec->fade.spring.current, &total_damage);
 896 }
 897
 898 struct wlsc_frame_callback {
 899         struct wl_resource resource;
 900         struct wl_list link;
 901 };
 902
 903 static void
 904 repaint(void *data, int msecs)
 905 {
 906         struct wlsc_output *output = data;
 907         struct wlsc_compositor *compositor = output->compositor;
 908         struct wlsc_animation *animation, *next;
 909         struct wlsc_frame_callback *cb, *cnext;
 910
 911         wlsc_output_repaint(output);
 912         output->repaint_needed = 0;
 913         output->repaint_scheduled = 1;
 914         output->present(output);
 915
 916         wl_list_for_each_safe(cb, cnext, &output->frame_callback_list, link) {
 917                 wl_resource_post_event(&cb->resource, WL_CALLBACK_DONE, msecs);
 918                 wl_resource_destroy(&cb->resource, 0);
 919         }
 920
 921         wl_list_for_each_safe(animation, next,
 922                               &compositor->animation_list, link)
 923                 animation->frame(animation, output, msecs);
 924 }
 925
 926 static void
 927 idle_repaint(void *data)
 928 {
 929         repaint(data, wlsc_compositor_get_time());
 930 }
 931
 932 WL_EXPORT void
 933 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 934 {
 935         wlsc_buffer_post_release(output->scanout_buffer);
 936         output->scanout_buffer = NULL;
 937         output->repaint_scheduled = 0;
 938
 939         if (output->repaint_needed)
 940                 repaint(output, msecs);
 941 }
 942
 943 WL_EXPORT void
 944 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 945 {
 946         struct wlsc_output *output;
 947         struct wl_event_loop *loop;
 948
 949         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 950                 return;
 951
 952         loop = wl_display_get_event_loop(compositor->wl_display);
 953         wl_list_for_each(output, &compositor->output_list, link) {
 954                 output->repaint_needed = 1;
 955                 if (output->repaint_scheduled)
 956                         continue;
 957
 958                 wl_event_loop_add_idle(loop, idle_repaint, output);
 959                 output->repaint_scheduled = 1;
 960         }
 961 }
 962
 963 WL_EXPORT void
 964 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 965 {
 966         int done;
 967
 968         done = wlsc_spring_done(&compositor->fade.spring);
 969         compositor->fade.spring.target = tint;
 970         if (wlsc_spring_done(&compositor->fade.spring))
 971                 return;
 972
 973         if (done)
 974                 compositor->fade.spring.timestamp =
 975                         wlsc_compositor_get_time();
 976
 977         wlsc_compositor_damage_all(compositor);
 978         if (wl_list_empty(&compositor->fade.animation.link))
 979                 wl_list_insert(compositor->animation_list.prev,
 980                                &compositor->fade.animation.link);
 981 }
 982
 983 static void
 984 surface_destroy(struct wl_client *client, struct wl_resource *resource)
 985 {
 986         wl_resource_destroy(resource, wlsc_compositor_get_time());
 987 }
 988
 989 WL_EXPORT void
 990 wlsc_surface_assign_output(struct wlsc_surface *es)
 991 {
 992         struct wlsc_compositor *ec = es->compositor;
 993         struct wlsc_output *output;
 994         pixman_region32_t region;
 995         uint32_t max, area;
 996         pixman_box32_t *e;
 997
 998         max = 0;
 999         wl_list_for_each(output, &ec->output_list, link) {
1000                 pixman_region32_init_rect(&region,
1001                                           es->x, es->y, es->width, es->height);
1002                 pixman_region32_intersect(&region, &region, &output->region);
1003
1004                 e = pixman_region32_extents(&region);
1005                 area = (e->x2 - e->x1) * (e->y2 - e->y1);
1006
1007                 if (area >= max) {
1008                         es->output = output;
1009                         max = area;
1010                 }
1011         }
1012 }
1013
1014 static void
1015 surface_attach(struct wl_client *client,
1016                struct wl_resource *resource, struct wl_buffer *buffer,
1017                int32_t x, int32_t y)
1018 {
1019         struct wlsc_surface *es = resource->data;
1020
1021         buffer->busy_count++;
1022         wlsc_buffer_post_release(es->buffer);
1023
1024         es->buffer = buffer;
1025         wl_list_remove(&es->buffer_destroy_listener.link);
1026         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
1027                        &es->buffer_destroy_listener.link);
1028
1029         if (es->visual == NULL)
1030                 wl_list_insert(&es->compositor->surface_list, &es->link);
1031
1032         es->visual = buffer->visual;
1033         if (x != 0 || y != 0 ||
1034             es->width != buffer->width || es->height != buffer->height)
1035                 wlsc_surface_configure(es, es->x + x, es->y + y,
1036                                        buffer->width, buffer->height);
1037
1038         wlsc_buffer_attach(buffer, &es->surface);
1039
1040         es->compositor->shell->attach(es->compositor->shell, es);
1041 }
1042
1043 static void
1044 surface_damage(struct wl_client *client,
1045                struct wl_resource *resource,
1046                int32_t x, int32_t y, int32_t width, int32_t height)
1047 {
1048         struct wlsc_surface *es = resource->data;
1049
1050         wlsc_surface_damage_rectangle(es, x, y, width, height);
1051 }
1052
1053 static void
1054 destroy_frame_callback(struct wl_resource *resource)
1055 {
1056         struct wlsc_frame_callback *cb = resource->data;
1057
1058         wl_list_remove(&cb->link);
1059         free(resource);
1060 }
1061
1062 static void
1063 surface_frame(struct wl_client *client,
1064               struct wl_resource *resource, uint32_t callback)
1065 {
1066         struct wlsc_frame_callback *cb;
1067         struct wlsc_surface *es = resource->data;
1068
1069         cb = malloc(sizeof *cb);
1070         if (cb == NULL) {
1071                 wl_client_post_no_memory(client);
1072                 return;
1073         }
1074
1075         cb->resource.object.interface = &wl_callback_interface;
1076         cb->resource.object.id = callback;
1077         cb->resource.destroy = destroy_frame_callback;
1078         cb->resource.client = client;
1079         cb->resource.data = cb;
1080         wl_list_insert(es->output->frame_callback_list.prev, &cb->link);
1081
1082         wl_client_add_resource(client, &cb->resource);
1083 }
1084
1085 const static struct wl_surface_interface surface_interface = {
1086         surface_destroy,
1087         surface_attach,
1088         surface_damage,
1089         surface_frame
1090 };
1091
1092 static void
1093 wlsc_input_device_attach(struct wlsc_input_device *device,
1094                          int x, int y, int width, int height)
1095 {
1096         wlsc_surface_damage_below(device->sprite);
1097
1098         device->hotspot_x = x;
1099         device->hotspot_y = y;
1100
1101         device->sprite->x = device->input_device.x - device->hotspot_x;
1102         device->sprite->y = device->input_device.y - device->hotspot_y;
1103         device->sprite->width = width;
1104         device->sprite->height = height;
1105
1106         wlsc_surface_damage(device->sprite);
1107 }
1108
1109 static void
1110 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1111                                 struct wl_buffer *buffer, int x, int y)
1112 {
1113         wlsc_buffer_attach(buffer, &device->sprite->surface);
1114         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1115 }
1116
1117 static void
1118 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1119                                 struct wlsc_sprite *sprite, int x, int y)
1120 {
1121         wlsc_sprite_attach(sprite, &device->sprite->surface);
1122         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1123 }
1124
1125 WL_EXPORT void
1126 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1127                                     enum wlsc_pointer_type type)
1128 {
1129         struct wlsc_compositor *compositor =
1130                 (struct wlsc_compositor *) device->input_device.compositor;
1131
1132         wlsc_input_device_attach_sprite(device,
1133                                         compositor->pointer_sprites[type],
1134                                         pointer_images[type].hotspot_x,
1135                                         pointer_images[type].hotspot_y);
1136 }
1137
1138 static void
1139 compositor_create_surface(struct wl_client *client,
1140                           struct wl_resource *resource, uint32_t id)
1141 {
1142         struct wlsc_compositor *ec = resource->data;
1143         struct wlsc_surface *surface;
1144
1145         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1146         if (surface == NULL) {
1147                 wl_client_post_no_memory(client);
1148                 return;
1149         }
1150
1151         surface->surface.resource.destroy = destroy_surface;
1152
1153         surface->surface.resource.object.id = id;
1154         surface->surface.resource.object.interface = &wl_surface_interface;
1155         surface->surface.resource.object.implementation =
1156                 (void (**)(void)) &surface_interface;
1157         surface->surface.resource.data = surface;
1158
1159         wl_client_add_resource(client, &surface->surface.resource);
1160 }
1161
1162 const static struct wl_compositor_interface compositor_interface = {
1163         compositor_create_surface,
1164 };
1165
1166 static void
1167 wlsc_surface_transform(struct wlsc_surface *surface,
1168                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1169 {
1170         *sx = x - surface->x;
1171         *sy = y - surface->y;
1172 }
1173
1174 WL_EXPORT struct wlsc_surface *
1175 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1176 {
1177         struct wlsc_compositor *ec =
1178                 (struct wlsc_compositor *) device->compositor;
1179         struct wlsc_surface *es;
1180
1181         wl_list_for_each(es, &ec->surface_list, link) {
1182                 if (es->surface.resource.client == NULL)
1183                         continue;
1184                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1185                 if (0 <= *sx && *sx < es->width &&
1186                     0 <= *sy && *sy < es->height)
1187                         return es;
1188         }
1189
1190         return NULL;
1191 }
1192
1193
1194 static void
1195 motion_grab_motion(struct wl_grab *grab,
1196                    uint32_t time, int32_t x, int32_t y)
1197 {
1198         struct wlsc_input_device *device =
1199                 (struct wlsc_input_device *) grab->input_device;
1200         struct wlsc_surface *es =
1201                 (struct wlsc_surface *) device->input_device.pointer_focus;
1202         int32_t sx, sy;
1203         struct wl_resource *resource;
1204
1205         resource = grab->input_device->pointer_focus_resource;
1206         if (resource) {
1207                 wlsc_surface_transform(es, x, y, &sx, &sy);
1208                 wl_resource_post_event(resource, WL_INPUT_DEVICE_MOTION,
1209                                        time, x, y, sx, sy);
1210         }
1211 }
1212
1213 static void
1214 motion_grab_button(struct wl_grab *grab,
1215                    uint32_t time, int32_t button, int32_t state)
1216 {
1217         struct wl_resource *resource;
1218
1219         resource = grab->input_device->pointer_focus_resource;
1220         if (resource)
1221                 wl_resource_post_event(resource, WL_INPUT_DEVICE_BUTTON,
1222                                        time, button, state);
1223 }
1224
1225 static void
1226 motion_grab_end(struct wl_grab *grab, uint32_t time)
1227 {
1228 }
1229
1230 static const struct wl_grab_interface motion_grab_interface = {
1231         motion_grab_motion,
1232         motion_grab_button,
1233         motion_grab_end
1234 };
1235
1236 WL_EXPORT void
1237 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1238 {
1239         if (compositor->idle_inhibit)
1240                 return;
1241
1242         wlsc_compositor_fade(compositor, 0.0);
1243         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1244
1245         wl_event_source_timer_update(compositor->idle_source,
1246                                      option_idle_time * 1000);
1247 }
1248
1249 static void
1250 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1251 {
1252         wlsc_compositor_wake(compositor);
1253         compositor->idle_inhibit++;
1254 }
1255
1256 static void
1257 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1258 {
1259         compositor->idle_inhibit--;
1260         wlsc_compositor_wake(compositor);
1261 }
1262
1263 static int
1264 idle_handler(void *data)
1265 {
1266         struct wlsc_compositor *compositor = data;
1267
1268         if (compositor->idle_inhibit)
1269                 return 1;
1270
1271         wlsc_compositor_fade(compositor, 1.0);
1272
1273         return 1;
1274 }
1275
1276 WL_EXPORT void
1277 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1278 {
1279         struct wlsc_surface *es;
1280         struct wlsc_compositor *ec =
1281                 (struct wlsc_compositor *) device->compositor;
1282         struct wlsc_output *output;
1283         const struct wl_grab_interface *interface;
1284         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1285         int32_t sx, sy;
1286         int x_valid = 0, y_valid = 0;
1287         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1288
1289         wlsc_compositor_wake(ec);
1290
1291         wl_list_for_each(output, &ec->output_list, link) {
1292                 if (output->x <= x && x <= output->x + output->current->width)
1293                         x_valid = 1;
1294
1295                 if (output->y <= y && y <= output->y + output->current->height)
1296                         y_valid = 1;
1297
1298                 /* FIXME: calculate this only on output addition/deletion */
1299                 if (output->x < min_x)
1300                         min_x = output->x;
1301                 if (output->y < min_y)
1302                         min_y = output->y;
1303
1304                 if (output->x + output->current->width > max_x)
1305                         max_x = output->x + output->current->width;
1306                 if (output->y + output->current->height > max_y)
1307                         max_y = output->y + output->current->height;
1308         }
1309
1310         if (!x_valid) {
1311                 if (x < min_x)
1312                         x = min_x;
1313                 else if (x >= max_x)
1314                         x = max_x;
1315         }
1316         if (!y_valid) {
1317                 if (y < min_y)
1318                         y = min_y;
1319                 else  if (y >= max_y)
1320                         y = max_y;
1321         }
1322
1323         device->x = x;
1324         device->y = y;
1325
1326         if (device->grab) {
1327                 interface = device->grab->interface;
1328                 interface->motion(device->grab, time, x, y);
1329         } else {
1330                 es = pick_surface(device, &sx, &sy);
1331                 wl_input_device_set_pointer_focus(device,
1332                                                   &es->surface,
1333                                                   time, x, y, sx, sy);
1334                 if (device->pointer_focus_resource)
1335                         wl_resource_post_event(device->pointer_focus_resource,
1336                                                WL_INPUT_DEVICE_MOTION,
1337                                                time, x, y, sx, sy);
1338         }
1339
1340         wlsc_surface_damage_below(wd->sprite);
1341
1342         wd->sprite->x = device->x - wd->hotspot_x;
1343         wd->sprite->y = device->y - wd->hotspot_y;
1344
1345         wlsc_surface_damage(wd->sprite);
1346 }
1347
1348 WL_EXPORT void
1349 wlsc_surface_activate(struct wlsc_surface *surface,
1350                       struct wlsc_input_device *device, uint32_t time)
1351 {
1352         struct wlsc_shell *shell = surface->compositor->shell;
1353
1354         wlsc_surface_raise(surface);
1355         if (device->selection)
1356                 shell->set_selection_focus(shell,
1357                                            device->selection,
1358                                            &surface->surface, time);
1359
1360         wl_input_device_set_keyboard_focus(&device->input_device,
1361                                            &surface->surface,
1362                                            time);
1363 }
1364
1365 struct wlsc_binding {
1366         uint32_t key;
1367         uint32_t button;
1368         uint32_t modifier;
1369         wlsc_binding_handler_t handler;
1370         void *data;
1371         struct wl_list link;
1372 };
1373
1374 WL_EXPORT void
1375 notify_button(struct wl_input_device *device,
1376               uint32_t time, int32_t button, int32_t state)
1377 {
1378         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1379         struct wlsc_compositor *compositor =
1380                 (struct wlsc_compositor *) device->compositor;
1381         struct wlsc_binding *b;
1382         struct wlsc_surface *surface =
1383                 (struct wlsc_surface *) device->pointer_focus;
1384
1385         if (state)
1386                 wlsc_compositor_idle_inhibit(compositor);
1387         else
1388                 wlsc_compositor_idle_release(compositor);
1389
1390         if (state && surface && device->grab == NULL) {
1391                 wlsc_surface_activate(surface, wd, time);
1392                 wl_input_device_start_grab(device,
1393                                            &device->motion_grab,
1394                                            button, time);
1395         }
1396
1397         wl_list_for_each(b, &compositor->binding_list, link) {
1398                 if (b->button == button &&
1399                     b->modifier == wd->modifier_state && state) {
1400                         b->handler(&wd->input_device,
1401                                    time, 0, button, state, b->data);
1402                         break;
1403                 }
1404         }
1405
1406         if (device->grab)
1407                 device->grab->interface->button(device->grab, time,
1408                                                 button, state);
1409
1410         if (!state && device->grab && device->grab_button == button)
1411                 wl_input_device_end_grab(device, time);
1412 }
1413
1414 static void
1415 terminate_binding(struct wl_input_device *device, uint32_t time,
1416                   uint32_t key, uint32_t button, uint32_t state, void *data)
1417 {
1418         struct wlsc_compositor *compositor = data;
1419
1420         if (state)
1421                 wl_display_terminate(compositor->wl_display);
1422 }
1423
1424 WL_EXPORT struct wlsc_binding *
1425 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1426                             uint32_t key, uint32_t button, uint32_t modifier,
1427                             wlsc_binding_handler_t handler, void *data)
1428 {
1429         struct wlsc_binding *binding;
1430
1431         binding = malloc(sizeof *binding);
1432         if (binding == NULL)
1433                 return NULL;
1434
1435         binding->key = key;
1436         binding->button = button;
1437         binding->modifier = modifier;
1438         binding->handler = handler;
1439         binding->data = data;
1440         wl_list_insert(compositor->binding_list.prev, &binding->link);
1441
1442         return binding;
1443 }
1444
1445 WL_EXPORT void
1446 wlsc_binding_destroy(struct wlsc_binding *binding)
1447 {
1448         wl_list_remove(&binding->link);
1449         free(binding);
1450 }
1451
1452 static void
1453 update_modifier_state(struct wlsc_input_device *device,
1454                       uint32_t key, uint32_t state)
1455 {
1456         uint32_t modifier;
1457
1458         switch (key) {
1459         case KEY_LEFTCTRL:
1460         case KEY_RIGHTCTRL:
1461                 modifier = MODIFIER_CTRL;
1462                 break;
1463
1464         case KEY_LEFTALT:
1465         case KEY_RIGHTALT:
1466                 modifier = MODIFIER_ALT;
1467                 break;
1468
1469         case KEY_LEFTMETA:
1470         case KEY_RIGHTMETA:
1471                 modifier = MODIFIER_SUPER;
1472                 break;
1473
1474         default:
1475                 modifier = 0;
1476                 break;
1477         }
1478
1479         if (state)
1480                 device->modifier_state |= modifier;
1481         else
1482                 device->modifier_state &= ~modifier;
1483 }
1484
1485 WL_EXPORT void
1486 notify_key(struct wl_input_device *device,
1487            uint32_t time, uint32_t key, uint32_t state)
1488 {
1489         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1490         struct wlsc_compositor *compositor =
1491                 (struct wlsc_compositor *) device->compositor;
1492         uint32_t *k, *end;
1493         struct wlsc_binding *b;
1494
1495         if (state)
1496                 wlsc_compositor_idle_inhibit(compositor);
1497         else
1498                 wlsc_compositor_idle_release(compositor);
1499
1500         wl_list_for_each(b, &compositor->binding_list, link) {
1501                 if (b->key == key &&
1502                     b->modifier == wd->modifier_state) {
1503                         b->handler(&wd->input_device,
1504                                    time, key, 0, state, b->data);
1505                         break;
1506                 }
1507         }
1508
1509         update_modifier_state(wd, key, state);
1510         end = device->keys.data + device->keys.size;
1511         for (k = device->keys.data; k < end; k++) {
1512                 if (*k == key)
1513                         *k = *--end;
1514         }
1515         device->keys.size = (void *) end - device->keys.data;
1516         if (state) {
1517                 k = wl_array_add(&device->keys, sizeof *k);
1518                 *k = key;
1519         }
1520
1521         if (device->keyboard_focus_resource)
1522                 wl_resource_post_event(device->keyboard_focus_resource,
1523                                        WL_INPUT_DEVICE_KEY, time, key, state);
1524 }
1525
1526 WL_EXPORT void
1527 notify_pointer_focus(struct wl_input_device *device,
1528                      uint32_t time, struct wlsc_output *output,
1529                      int32_t x, int32_t y)
1530 {
1531         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1532         struct wlsc_compositor *compositor =
1533                 (struct wlsc_compositor *) device->compositor;
1534         struct wlsc_surface *es;
1535         int32_t sx, sy;
1536
1537         if (output) {
1538                 device->x = x;
1539                 device->y = y;
1540                 es = pick_surface(device, &sx, &sy);
1541                 wl_input_device_set_pointer_focus(device,
1542                                                   &es->surface,
1543                                                   time, x, y, sx, sy);
1544
1545                 compositor->focus = 1;
1546
1547                 wd->sprite->x = device->x - wd->hotspot_x;
1548                 wd->sprite->y = device->y - wd->hotspot_y;
1549         } else {
1550                 wl_input_device_set_pointer_focus(device, NULL,
1551                                                   time, 0, 0, 0, 0);
1552                 compositor->focus = 0;
1553         }
1554
1555         wlsc_surface_damage(wd->sprite);
1556 }
1557
1558 WL_EXPORT void
1559 notify_keyboard_focus(struct wl_input_device *device,
1560                       uint32_t time, struct wlsc_output *output,
1561                       struct wl_array *keys)
1562 {
1563         struct wlsc_input_device *wd =
1564                 (struct wlsc_input_device *) device;
1565         struct wlsc_compositor *compositor =
1566                 (struct wlsc_compositor *) device->compositor;
1567         struct wlsc_surface *es;
1568         uint32_t *k, *end;
1569
1570         if (!wl_list_empty(&compositor->surface_list))
1571                 es = container_of(compositor->surface_list.next,
1572                                   struct wlsc_surface, link);
1573         else
1574                 es = NULL;
1575
1576         if (output) {
1577                 wl_array_copy(&wd->input_device.keys, keys);
1578                 wd->modifier_state = 0;
1579                 end = device->keys.data + device->keys.size;
1580                 for (k = device->keys.data; k < end; k++) {
1581                         wlsc_compositor_idle_inhibit(compositor);
1582                         update_modifier_state(wd, *k, 1);
1583                 }
1584
1585                 if (es->surface.resource.client)
1586                         wl_input_device_set_keyboard_focus(&wd->input_device,
1587                                                            &es->surface, time);
1588         } else {
1589                 end = device->keys.data + device->keys.size;
1590                 for (k = device->keys.data; k < end; k++)
1591                         wlsc_compositor_idle_release(compositor);
1592
1593                 wd->modifier_state = 0;
1594                 wl_input_device_set_keyboard_focus(&wd->input_device,
1595                                                    NULL, time);
1596         }
1597 }
1598
1599
1600 static void
1601 input_device_attach(struct wl_client *client,
1602                     struct wl_resource *resource,
1603                     uint32_t time,
1604                     struct wl_buffer *buffer, int32_t x, int32_t y)
1605 {
1606         struct wlsc_input_device *device = resource->data;
1607
1608         if (time < device->input_device.pointer_focus_time)
1609                 return;
1610         if (device->input_device.pointer_focus == NULL)
1611                 return;
1612         if (device->input_device.pointer_focus->resource.client != client)
1613                 return;
1614
1615         if (buffer == NULL) {
1616                 wlsc_input_device_set_pointer_image(device,
1617                                                     WLSC_POINTER_LEFT_PTR);
1618                 return;
1619         }
1620
1621         wlsc_input_device_attach_buffer(device, buffer, x, y);
1622 }
1623
1624 const static struct wl_input_device_interface input_device_interface = {
1625         input_device_attach,
1626 };
1627
1628 WL_EXPORT void
1629 wlsc_input_device_init(struct wlsc_input_device *device,
1630                        struct wlsc_compositor *ec)
1631 {
1632         wl_input_device_init(&device->input_device, &ec->compositor);
1633
1634         device->input_device.resource.object.interface = &wl_input_device_interface;
1635         device->input_device.resource.object.implementation =
1636                 (void (**)(void)) &input_device_interface;
1637         device->input_device.resource.data = device;
1638         wl_display_add_global(ec->wl_display,
1639                               &device->input_device.resource.object, NULL);
1640
1641         device->sprite = wlsc_surface_create(ec,
1642                                              device->input_device.x,
1643                                              device->input_device.y, 32, 32);
1644         wl_list_insert(&ec->surface_list, &device->sprite->link);
1645
1646         device->hotspot_x = 16;
1647         device->hotspot_y = 16;
1648         device->modifier_state = 0;
1649
1650         device->input_device.motion_grab.interface = &motion_grab_interface;
1651
1652         wl_list_insert(ec->input_device_list.prev, &device->link);
1653
1654         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1655 }
1656
1657 static void
1658 wlsc_output_post_geometry(struct wl_client *client,
1659                           struct wl_object *global, uint32_t version)
1660 {
1661         struct wlsc_output *output =
1662                 container_of(global, struct wlsc_output, resource.object);
1663         struct wlsc_mode *mode;
1664
1665         output->resource.client = client;
1666         wl_resource_post_event(&output->resource,
1667                                WL_OUTPUT_GEOMETRY,
1668                                output->x,
1669                                output->y,
1670                                output->mm_width,
1671                                output->mm_height,
1672                                output->subpixel,
1673                                output->make, output->model);
1674
1675         wl_list_for_each (mode, &output->mode_list, link) {
1676                 wl_resource_post_event(&output->resource,
1677                                        WL_OUTPUT_MODE,
1678                                        mode->flags,
1679                                        mode->width,
1680                                        mode->height,
1681                                        mode->refresh);
1682         }
1683 }
1684
1685 static const char vertex_shader[] =
1686         "uniform mat4 proj;\n"
1687         "attribute vec2 position;\n"
1688         "attribute vec2 texcoord;\n"
1689         "varying vec2 v_texcoord;\n"
1690         "void main()\n"
1691         "{\n"
1692         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1693         "   v_texcoord = texcoord;\n"
1694         "}\n";
1695
1696 static const char texture_fragment_shader[] =
1697         "precision mediump float;\n"
1698         "varying vec2 v_texcoord;\n"
1699         "uniform sampler2D tex;\n"
1700         "void main()\n"
1701         "{\n"
1702         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1703         "}\n";
1704
1705 static const char solid_fragment_shader[] =
1706         "precision mediump float;\n"
1707         "uniform vec4 color;\n"
1708         "void main()\n"
1709         "{\n"
1710         "   gl_FragColor = color\n;"
1711         "}\n";
1712
1713 static int
1714 compile_shader(GLenum type, const char *source)
1715 {
1716         GLuint s;
1717         char msg[512];
1718         GLint status;
1719
1720         s = glCreateShader(type);
1721         glShaderSource(s, 1, &source, NULL);
1722         glCompileShader(s);
1723         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1724         if (!status) {
1725                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1726                 fprintf(stderr, "shader info: %s\n", msg);
1727                 return GL_NONE;
1728         }
1729
1730         return s;
1731 }
1732
1733 static int
1734 wlsc_shader_init(struct wlsc_shader *shader,
1735                  const char *vertex_source, const char *fragment_source)
1736 {
1737         char msg[512];
1738         GLint status;
1739
1740         shader->vertex_shader =
1741                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1742         shader->fragment_shader =
1743                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1744
1745         shader->program = glCreateProgram();
1746         glAttachShader(shader->program, shader->vertex_shader);
1747         glAttachShader(shader->program, shader->fragment_shader);
1748         glBindAttribLocation(shader->program, 0, "position");
1749         glBindAttribLocation(shader->program, 1, "texcoord");
1750
1751         glLinkProgram(shader->program);
1752         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1753         if (!status) {
1754                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1755                 fprintf(stderr, "link info: %s\n", msg);
1756                 return -1;
1757         }
1758
1759         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1760         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1761
1762         return 0;
1763 }
1764
1765 static int
1766 init_solid_shader(struct wlsc_shader *shader,
1767                   GLuint vertex_shader, const char *fragment_source)
1768 {
1769         GLint status;
1770         char msg[512];
1771
1772         shader->vertex_shader = vertex_shader;
1773         shader->fragment_shader =
1774                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1775
1776         shader->program = glCreateProgram();
1777         glAttachShader(shader->program, shader->vertex_shader);
1778         glAttachShader(shader->program, shader->fragment_shader);
1779         glBindAttribLocation(shader->program, 0, "position");
1780         glBindAttribLocation(shader->program, 1, "texcoord");
1781
1782         glLinkProgram(shader->program);
1783         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1784         if (!status) {
1785                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1786                 fprintf(stderr, "link info: %s\n", msg);
1787                 return -1;
1788         }
1789
1790         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1791         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1792
1793         return 0;
1794 }
1795
1796 WL_EXPORT void
1797 wlsc_output_destroy(struct wlsc_output *output)
1798 {
1799         pixman_region32_fini(&output->region);
1800         pixman_region32_fini(&output->previous_damage);
1801         destroy_surface(&output->background->surface.resource);
1802 }
1803
1804 WL_EXPORT void
1805 wlsc_output_move(struct wlsc_output *output, int x, int y)
1806 {
1807         struct wlsc_compositor *c = output->compositor;
1808         int flip;
1809
1810         output->x = x;
1811         output->y = y;
1812
1813         if (output->background) {
1814                 output->background->x = x;
1815                 output->background->y = y;
1816         }
1817
1818         pixman_region32_init(&output->previous_damage);
1819         pixman_region32_init_rect(&output->region, x, y,
1820                                   output->current->width,
1821                                   output->current->height);
1822
1823         wlsc_matrix_init(&output->matrix);
1824         wlsc_matrix_translate(&output->matrix,
1825                               -output->x - output->current->width / 2.0,
1826                               -output->y - output->current->height / 2.0, 0);
1827
1828         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1829         wlsc_matrix_scale(&output->matrix,
1830                           2.0 / output->current->width,
1831                           flip * 2.0 / output->current->height, 1);
1832
1833         pixman_region32_union(&c->damage, &c->damage, &output->region);
1834 }
1835
1836 WL_EXPORT void
1837 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1838                  int x, int y, int width, int height, uint32_t flags)
1839 {
1840         output->compositor = c;
1841         output->x = x;
1842         output->y = y;
1843         output->mm_width = width;
1844         output->mm_height = height;
1845
1846         output->background =
1847                 background_create(output, option_background);
1848
1849         if (output->background != NULL)
1850                 wl_list_insert(c->surface_list.prev,
1851                                &output->background->link);
1852
1853         output->flags = flags;
1854         wlsc_output_move(output, x, y);
1855
1856         output->scanout_buffer_destroy_listener.func =
1857                 output_handle_scanout_buffer_destroy;
1858         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1859         wl_list_init(&output->frame_callback_list);
1860
1861         output->resource.object.interface = &wl_output_interface;
1862         wl_display_add_global(c->wl_display, &output->resource.object,
1863                               wlsc_output_post_geometry);
1864 }
1865
1866 static void
1867 shm_buffer_created(struct wl_buffer *buffer)
1868 {
1869         struct wl_list *surfaces_attached_to;
1870
1871         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1872         if (!surfaces_attached_to) {
1873                 buffer->user_data = NULL;
1874                 return;
1875         }
1876
1877         wl_list_init(surfaces_attached_to);
1878
1879         buffer->user_data = surfaces_attached_to;
1880 }
1881
1882 static void
1883 shm_buffer_damaged(struct wl_buffer *buffer,
1884                    int32_t x, int32_t y, int32_t width, int32_t height)
1885 {
1886         struct wl_list *surfaces_attached_to = buffer->user_data;
1887         struct wlsc_surface *es;
1888         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1889
1890         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1891                 glBindTexture(GL_TEXTURE_2D, es->texture);
1892                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1893                              tex_width, buffer->height, 0,
1894                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1895                              wl_shm_buffer_get_data(buffer));
1896                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1897                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1898         }
1899 }
1900
1901 static void
1902 shm_buffer_destroyed(struct wl_buffer *buffer)
1903 {
1904         struct wl_list *surfaces_attached_to = buffer->user_data;
1905         struct wlsc_surface *es, *next;
1906
1907         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1908                 wl_list_remove(&es->buffer_link);
1909                 wl_list_init(&es->buffer_link);
1910         }
1911
1912         free(surfaces_attached_to);
1913 }
1914
1915 const static struct wl_shm_callbacks shm_callbacks = {
1916         shm_buffer_created,
1917         shm_buffer_damaged,
1918         shm_buffer_destroyed
1919 };
1920
1921 WL_EXPORT int
1922 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1923 {
1924         struct wl_event_loop *loop;
1925         const char *extensions;
1926
1927         ec->wl_display = display;
1928
1929         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1930
1931         ec->shm = wl_shm_init(display, &shm_callbacks);
1932
1933         ec->image_target_texture_2d =
1934                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1935         ec->image_target_renderbuffer_storage = (void *)
1936                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1937         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1938         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1939         ec->bind_display =
1940                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1941         ec->unbind_display =
1942                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1943
1944         extensions = (const char *) glGetString(GL_EXTENSIONS);
1945         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1946                 fprintf(stderr,
1947                         "GL_EXT_texture_format_BGRA8888 not available\n");
1948                 return -1;
1949         }
1950
1951         extensions =
1952                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1953         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1954                 ec->has_bind_display = 1;
1955         if (ec->has_bind_display)
1956                 ec->bind_display(ec->display, ec->wl_display);
1957
1958         wl_list_init(&ec->surface_list);
1959         wl_list_init(&ec->input_device_list);
1960         wl_list_init(&ec->output_list);
1961         wl_list_init(&ec->binding_list);
1962         wl_list_init(&ec->animation_list);
1963         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1964         ec->fade.animation.frame = fade_frame;
1965         wl_list_init(&ec->fade.animation.link);
1966
1967         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1968                                     MODIFIER_CTRL | MODIFIER_ALT,
1969                                     terminate_binding, ec);
1970
1971         create_pointer_images(ec);
1972
1973         screenshooter_create(ec);
1974
1975         glActiveTexture(GL_TEXTURE0);
1976
1977         if (wlsc_shader_init(&ec->texture_shader,
1978                              vertex_shader, texture_fragment_shader) < 0)
1979                 return -1;
1980         if (init_solid_shader(&ec->solid_shader,
1981                               ec->texture_shader.vertex_shader,
1982                               solid_fragment_shader) < 0)
1983                 return -1;
1984
1985         loop = wl_display_get_event_loop(ec->wl_display);
1986         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1987         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1988
1989         pixman_region32_init(&ec->damage);
1990         wlsc_compositor_schedule_repaint(ec);
1991
1992         return 0;
1993 }
1994
1995 WL_EXPORT int
1996 wlsc_compositor_shutdown(struct wlsc_compositor *ec)
1997 {
1998         struct wlsc_output *output;
1999
2000         /* Destroy all outputs associated with this compositor */
2001         wl_list_for_each(output, &ec->output_list, link)
2002                 output->destroy(output);
2003 }
2004
2005 static int on_term_signal(int signal_number, void *data)
2006 {
2007         struct wl_display *display = data;
2008
2009         fprintf(stderr, "caught signal %d\n", signal_number);
2010         wl_display_terminate(display);
2011
2012         return 1;
2013 }
2014
2015 static void *
2016 load_module(const char *name, const char *entrypoint, void **handle)
2017 {
2018         char path[PATH_MAX];
2019         void *module, *init;
2020
2021         if (name[0] != '/')
2022                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
2023         else
2024                 snprintf(path, sizeof path, "%s", name);
2025
2026         module = dlopen(path, RTLD_LAZY);
2027         if (!module) {
2028                 fprintf(stderr,
2029                         "failed to load module: %s\n", dlerror());
2030                 return NULL;
2031         }
2032
2033         init = dlsym(module, entrypoint);
2034         if (!init) {
2035                 fprintf(stderr,
2036                         "failed to lookup init function: %s\n", dlerror());
2037                 return NULL;
2038         }
2039
2040         return init;
2041 }
2042
2043 int main(int argc, char *argv[])
2044 {
2045         struct wl_display *display;
2046         struct wlsc_compositor *ec;
2047         struct wl_event_loop *loop;
2048         int o, xserver = 0;
2049         void *shell_module, *backend_module;
2050         int (*shell_init)(struct wlsc_compositor *ec);
2051         struct wlsc_compositor
2052                 *(*backend_init)(struct wl_display *display, char *options);
2053         char *backend = NULL;
2054         char *backend_options = "";
2055         char *shell = NULL;
2056         char *p;
2057
2058         static const char opts[] = "B:b:o:S:i:s:x";
2059         static const struct option longopts[ ] = {
2060                 { "backend", 1, NULL, 'B' },
2061                 { "backend-options", 1, NULL, 'o' },
2062                 { "background", 1, NULL, 'b' },
2063                 { "socket", 1, NULL, 'S' },
2064                 { "idle-time", 1, NULL, 'i' },
2065                 { "shell", 1, NULL, 's' },
2066                 { "xserver", 0, NULL, 'x' },
2067                 { NULL, }
2068         };
2069
2070         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
2071                 switch (o) {
2072                 case 'b':
2073                         option_background = optarg;
2074                         break;
2075                 case 'B':
2076                         backend = optarg;
2077                         break;
2078                 case 'o':
2079                         backend_options = optarg;
2080                         break;
2081                 case 'S':
2082                         option_socket_name = optarg;
2083                         break;
2084                 case 'i':
2085                         option_idle_time = strtol(optarg, &p, 0);
2086                         if (*p != '\0') {
2087                                 fprintf(stderr,
2088                                         "invalid idle time option: %s\n",
2089                                         optarg);
2090                                 exit(EXIT_FAILURE);
2091                         }
2092                         break;
2093                 case 's':
2094                         shell = optarg;
2095                         break;
2096                 case 'x':
2097                         xserver = 1;
2098                         break;
2099                 }
2100         }
2101
2102         display = wl_display_create();
2103
2104         loop = wl_display_get_event_loop(display);
2105         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, display);
2106         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, display);
2107         wl_event_loop_add_signal(loop, SIGQUIT, on_term_signal, display);
2108
2109         wl_list_init(&child_process_list);
2110         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2111
2112         if (!backend) {
2113                 if (getenv("WAYLAND_DISPLAY"))
2114                         backend = "wayland-backend.so";
2115                 else if (getenv("DISPLAY"))
2116                         backend = "x11-backend.so";
2117                 else if (getenv("OPENWFD"))
2118                         backend = "openwfd-backend.so";
2119                 else
2120                         backend = "drm-backend.so";
2121         }
2122
2123         if (!shell)
2124                 shell = "desktop-shell.so";
2125
2126         backend_init = load_module(backend, "backend_init", &backend_module);
2127         if (!backend_init)
2128                 exit(EXIT_FAILURE);
2129
2130         shell_init = load_module(shell, "shell_init", &shell_module);
2131         if (!shell_init)
2132                 exit(EXIT_FAILURE);
2133
2134         ec = backend_init(display, backend_options);
2135         if (ec == NULL) {
2136                 fprintf(stderr, "failed to create compositor\n");
2137                 exit(EXIT_FAILURE);
2138         }
2139
2140         if (shell_init(ec) < 0)
2141                 exit(EXIT_FAILURE);
2142
2143         if (xserver)
2144                 wlsc_xserver_init(ec);
2145
2146         if (wl_display_add_socket(display, option_socket_name)) {
2147                 fprintf(stderr, "failed to add socket: %m\n");
2148                 exit(EXIT_FAILURE);
2149         }
2150
2151         wl_display_run(display);
2152
2153         if (xserver)
2154                 wlsc_xserver_destroy(ec);
2155
2156         if (ec->has_bind_display)
2157                 ec->unbind_display(ec->display, display);
2158         wl_display_destroy(display);
2159
2160         ec->destroy(ec);
2161
2162         return 0;
2163 }