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->compositor = compositor;
 245         surface->visual = NULL;
 246         surface->image = EGL_NO_IMAGE_KHR;
 247         surface->saved_texture = 0;
 248         surface->x = x;
 249         surface->y = y;
 250         surface->width = width;
 251         surface->height = height;
 252
 253         surface->buffer = NULL;
 254
 255         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 256         wl_list_init(&surface->buffer_destroy_listener.link);
 257
 258         surface->transform = NULL;
 259
 260         return surface;
 261 }
 262
 263 WL_EXPORT void
 264 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 265                               int32_t x, int32_t y,
 266                               int32_t width, int32_t height)
 267 {
 268         struct wlsc_compositor *compositor = surface->compositor;
 269
 270         pixman_region32_union_rect(&compositor->damage_region,
 271                                    &compositor->damage_region,
 272                                    surface->x + x, surface->y + y,
 273                                    width, height);
 274         wlsc_compositor_schedule_repaint(compositor);
 275 }
 276
 277 WL_EXPORT void
 278 wlsc_surface_damage(struct wlsc_surface *surface)
 279 {
 280         wlsc_surface_damage_rectangle(surface, 0, 0,
 281                                       surface->width, surface->height);
 282 }
 283
 284 WL_EXPORT uint32_t
 285 wlsc_compositor_get_time(void)
 286 {
 287         struct timeval tv;
 288
 289         gettimeofday(&tv, NULL);
 290
 291         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 292 }
 293
 294 static void
 295 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 296 {
 297         struct wlsc_surface *surface =
 298                 container_of(resource, struct wlsc_surface, surface.resource);
 299         struct wlsc_compositor *compositor = surface->compositor;
 300
 301         wlsc_surface_damage(surface);
 302
 303         wl_list_remove(&surface->link);
 304         if (surface->saved_texture == 0)
 305                 glDeleteTextures(1, &surface->texture);
 306         else
 307                 glDeleteTextures(1, &surface->saved_texture);
 308
 309         if (surface->buffer)
 310                 wl_list_remove(&surface->buffer_destroy_listener.link);
 311
 312         if (surface->image != EGL_NO_IMAGE_KHR)
 313                 compositor->destroy_image(compositor->display,
 314                                           surface->image);
 315
 316         wl_list_remove(&surface->buffer_link);
 317
 318         free(surface);
 319 }
 320
 321 static void
 322 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 323 {
 324         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 325         struct wlsc_compositor *ec = es->compositor;
 326         struct wl_list *surfaces_attached_to;
 327
 328         if (es->saved_texture != 0)
 329                 es->texture = es->saved_texture;
 330
 331         glBindTexture(GL_TEXTURE_2D, es->texture);
 332
 333         if (wl_buffer_is_shm(buffer)) {
 334                 /* Unbind any EGLImage texture that may be bound, so we don't
 335                  * overwrite it.*/
 336                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 337                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 338                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 339                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 340                              es->pitch, buffer->height, 0,
 341                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 342                              wl_shm_buffer_get_data(buffer));
 343                 es->visual = buffer->visual;
 344
 345                 surfaces_attached_to = buffer->user_data;
 346
 347                 wl_list_remove(&es->buffer_link);
 348                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 349         } else {
 350                 if (es->image != EGL_NO_IMAGE_KHR)
 351                         ec->destroy_image(ec->display, es->image);
 352                 es->image = ec->create_image(ec->display, NULL,
 353                                              EGL_WAYLAND_BUFFER_WL,
 354                                              buffer, NULL);
 355
 356                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 357                 es->visual = buffer->visual;
 358                 es->pitch = es->width;
 359         }
 360 }
 361
 362 static void
 363 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 364 {
 365         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 366         struct wlsc_compositor *ec = es->compositor;
 367
 368         es->pitch = es->width;
 369         es->image = sprite->image;
 370         if (sprite->image != EGL_NO_IMAGE_KHR) {
 371                 glBindTexture(GL_TEXTURE_2D, es->texture);
 372                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 373         } else {
 374                 if (es->saved_texture == 0)
 375                         es->saved_texture = es->texture;
 376                 es->texture = sprite->texture;
 377         }
 378
 379         es->visual = sprite->visual;
 380
 381         if (es->buffer)
 382                 es->buffer = NULL;
 383 }
 384
 385 enum sprite_usage {
 386         SPRITE_USE_CURSOR = (1 << 0),
 387 };
 388
 389 static struct wlsc_sprite *
 390 create_sprite_from_png(struct wlsc_compositor *ec,
 391                        const char *filename, uint32_t usage)
 392 {
 393         uint32_t *pixels;
 394         struct wlsc_sprite *sprite;
 395         int32_t width, height;
 396         uint32_t stride;
 397
 398         pixels = wlsc_load_image(filename, &width, &height, &stride);
 399         if (pixels == NULL)
 400                 return NULL;
 401
 402         sprite = malloc(sizeof *sprite);
 403         if (sprite == NULL) {
 404                 free(pixels);
 405                 return NULL;
 406         }
 407
 408         sprite->visual = &ec->compositor.premultiplied_argb_visual;
 409         sprite->width = width;
 410         sprite->height = height;
 411         sprite->image = EGL_NO_IMAGE_KHR;
 412
 413         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 414                 sprite->image = ec->create_cursor_image(ec, width, height);
 415
 416         glGenTextures(1, &sprite->texture);
 417         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 418         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 419         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 420         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 421         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 422
 423         if (sprite->image != EGL_NO_IMAGE_KHR) {
 424                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 425                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 426                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 427         } else {
 428                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 429                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 430         }
 431
 432         free(pixels);
 433
 434         return sprite;
 435 }
 436
 437 static const struct {
 438         const char *filename;
 439         int hotspot_x, hotspot_y;
 440 } pointer_images[] = {
 441         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 442         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 443         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 444         { DATADIR "/wayland/grabbing.png",              20, 17 },
 445         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 446         { DATADIR "/wayland/left_side.png",             10, 20 },
 447         { DATADIR "/wayland/right_side.png",            30, 19 },
 448         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 449         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 450         { DATADIR "/wayland/top_side.png",              18,  8 },
 451         { DATADIR "/wayland/xterm.png",                 15, 15 }
 452 };
 453
 454 static void
 455 create_pointer_images(struct wlsc_compositor *ec)
 456 {
 457         int i, count;
 458
 459         count = ARRAY_LENGTH(pointer_images);
 460         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 461         for (i = 0; i < count; i++) {
 462                 ec->pointer_sprites[i] =
 463                         create_sprite_from_png(ec,
 464                                                pointer_images[i].filename,
 465                                                SPRITE_USE_CURSOR);
 466         }
 467 }
 468
 469 static struct wlsc_surface *
 470 background_create(struct wlsc_output *output, const char *filename)
 471 {
 472         struct wlsc_surface *background;
 473         struct wlsc_sprite *sprite;
 474
 475         background = wlsc_surface_create(output->compositor,
 476                                          output->x, output->y,
 477                                          output->current->width,
 478                                          output->current->height);
 479         if (background == NULL)
 480                 return NULL;
 481
 482         sprite = create_sprite_from_png(output->compositor, filename, 0);
 483         if (sprite == NULL) {
 484                 free(background);
 485                 return NULL;
 486         }
 487
 488         wlsc_sprite_attach(sprite, &background->surface);
 489
 490         return background;
 491 }
 492
 493 static int
 494 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 495 {
 496         struct wlsc_compositor *ec = es->compositor;
 497         GLfloat *v, inv_width, inv_height;
 498         pixman_box32_t *rectangles;
 499         unsigned int *p;
 500         int i, n;
 501
 502         rectangles = pixman_region32_rectangles(region, &n);
 503         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 504         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 505         inv_width = 1.0 / es->pitch;
 506         inv_height = 1.0 / es->height;
 507
 508         for (i = 0; i < n; i++, v += 16, p += 6) {
 509                 v[ 0] = rectangles[i].x1;
 510                 v[ 1] = rectangles[i].y1;
 511                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 512                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 513
 514                 v[ 4] = rectangles[i].x1;
 515                 v[ 5] = rectangles[i].y2;
 516                 v[ 6] = v[ 2];
 517                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 518
 519                 v[ 8] = rectangles[i].x2;
 520                 v[ 9] = rectangles[i].y1;
 521                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 522                 v[11] = v[ 3];
 523
 524                 v[12] = rectangles[i].x2;
 525                 v[13] = rectangles[i].y2;
 526                 v[14] = v[10];
 527                 v[15] = v[ 7];
 528
 529                 p[0] = i * 4 + 0;
 530                 p[1] = i * 4 + 1;
 531                 p[2] = i * 4 + 2;
 532                 p[3] = i * 4 + 2;
 533                 p[4] = i * 4 + 1;
 534                 p[5] = i * 4 + 3;
 535         }
 536
 537         return n;
 538 }
 539
 540 static void
 541 transform_vertex(struct wlsc_surface *surface,
 542                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 543 {
 544         struct wlsc_vector t;
 545
 546         t.f[0] = x;
 547         t.f[1] = y;
 548         t.f[2] = 0.0;
 549         t.f[3] = 1.0;
 550
 551         wlsc_matrix_transform(&surface->transform->matrix, &t);
 552
 553         r[ 0] = t.f[0];
 554         r[ 1] = t.f[1];
 555         r[ 2] = u;
 556         r[ 3] = v;
 557 }
 558
 559 static int
 560 texture_transformed_surface(struct wlsc_surface *es)
 561 {
 562         struct wlsc_compositor *ec = es->compositor;
 563         GLfloat *v;
 564         unsigned int *p;
 565
 566         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 567         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 568
 569         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 570         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 571         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 572         transform_vertex(es, es->x + es->width, es->y + es->height,
 573                          1.0, 1.0, &v[12]);
 574
 575         p[0] = 0;
 576         p[1] = 1;
 577         p[2] = 2;
 578         p[3] = 2;
 579         p[4] = 1;
 580         p[5] = 3;
 581
 582         return 1;
 583 }
 584
 585 static void
 586 wlsc_surface_draw(struct wlsc_surface *es,
 587                   struct wlsc_output *output, pixman_region32_t *clip)
 588 {
 589         struct wlsc_compositor *ec = es->compositor;
 590         GLfloat *v;
 591         pixman_region32_t repaint;
 592         GLint filter;
 593         int n;
 594
 595         pixman_region32_init_rect(&repaint,
 596                                   es->x, es->y, es->width, es->height);
 597         pixman_region32_intersect(&repaint, &repaint, clip);
 598         if (!pixman_region32_not_empty(&repaint))
 599                 return;
 600
 601         if (es->visual == &ec->compositor.argb_visual) {
 602                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 603                 glEnable(GL_BLEND);
 604         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 605                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 606                 glEnable(GL_BLEND);
 607         } else {
 608                 glDisable(GL_BLEND);
 609         }
 610
 611         if (es->transform == NULL) {
 612                 filter = GL_NEAREST;
 613                 n = texture_region(es, &repaint);
 614         } else {
 615                 filter = GL_LINEAR;
 616                 n = texture_transformed_surface(es);
 617         }
 618
 619         glBindTexture(GL_TEXTURE_2D, es->texture);
 620         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 621         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 622
 623         v = ec->vertices.data;
 624         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 625         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 626         glEnableVertexAttribArray(0);
 627         glEnableVertexAttribArray(1);
 628         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 629
 630         ec->vertices.size = 0;
 631         ec->indices.size = 0;
 632         pixman_region32_fini(&repaint);
 633 }
 634
 635 static void
 636 wlsc_surface_raise(struct wlsc_surface *surface)
 637 {
 638         struct wlsc_compositor *compositor = surface->compositor;
 639
 640         wl_list_remove(&surface->link);
 641         wl_list_insert(&compositor->surface_list, &surface->link);
 642 }
 643
 644 WL_EXPORT void
 645 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 646 {
 647         struct wlsc_output *output;
 648
 649         wl_list_for_each(output, &compositor->output_list, link)
 650                 wlsc_output_damage(output);
 651 }
 652
 653 static inline void
 654 wlsc_buffer_post_release(struct wl_buffer *buffer)
 655 {
 656         if (buffer == NULL || --buffer->busy_count > 0)
 657                 return;
 658
 659         assert(buffer->client != NULL);
 660         wl_client_post_event(buffer->client,
 661                              &buffer->resource.object,
 662                              WL_BUFFER_RELEASE);
 663 }
 664
 665 WL_EXPORT void
 666 wlsc_output_damage(struct wlsc_output *output)
 667 {
 668         struct wlsc_compositor *compositor = output->compositor;
 669
 670         pixman_region32_union(&compositor->damage_region,
 671                               &compositor->damage_region, &output->region);
 672         wlsc_compositor_schedule_repaint(compositor);
 673 }
 674
 675 static void
 676 fade_frame(struct wlsc_animation *animation,
 677            struct wlsc_output *output, uint32_t msecs)
 678 {
 679         struct wlsc_compositor *compositor =
 680                 container_of(animation,
 681                              struct wlsc_compositor, fade.animation);
 682
 683         wlsc_spring_update(&compositor->fade.spring, msecs);
 684         if (wlsc_spring_done(&compositor->fade.spring)) {
 685                 if (compositor->fade.spring.current > 0.999) {
 686                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 687                         compositor->shell->lock(compositor->shell);
 688                 }
 689                 compositor->fade.spring.current =
 690                         compositor->fade.spring.target;
 691                 wl_list_remove(&animation->link);
 692                 wl_list_init(&animation->link);
 693         }
 694
 695         wlsc_output_damage(output);
 696 }
 697
 698 static void
 699 fade_output(struct wlsc_output *output,
 700             GLfloat tint, pixman_region32_t *region)
 701 {
 702         struct wlsc_compositor *compositor = output->compositor;
 703         struct wlsc_surface surface;
 704         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 705
 706         surface.compositor = compositor;
 707         surface.x = output->x;
 708         surface.y = output->y;
 709         surface.width = output->current->width;
 710         surface.height = output->current->height;
 711         surface.texture = GL_NONE;
 712         surface.transform = NULL;
 713
 714         if (tint <= 1.0)
 715                 surface.visual =
 716                         &compositor->compositor.premultiplied_argb_visual;
 717         else
 718                 surface.visual = &compositor->compositor.rgb_visual;
 719
 720         glUseProgram(compositor->solid_shader.program);
 721         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 722                            1, GL_FALSE, output->matrix.d);
 723         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 724         wlsc_surface_draw(&surface, output, region);
 725 }
 726
 727 static void
 728 wlsc_output_repaint(struct wlsc_output *output)
 729 {
 730         struct wlsc_compositor *ec = output->compositor;
 731         struct wlsc_surface *es;
 732         struct wlsc_input_device *eid, *hw_cursor;
 733         pixman_region32_t new_damage, total_damage;
 734
 735         output->prepare_render(output);
 736
 737         glViewport(0, 0, output->current->width, output->current->height);
 738
 739         glUseProgram(ec->texture_shader.program);
 740         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 741                            1, GL_FALSE, output->matrix.d);
 742         glUniform1i(ec->texture_shader.tex_uniform, 0);
 743
 744         pixman_region32_init(&new_damage);
 745         pixman_region32_init(&total_damage);
 746         pixman_region32_intersect(&new_damage,
 747                                   &ec->damage_region, &output->region);
 748         pixman_region32_subtract(&ec->damage_region,
 749                                  &ec->damage_region, &new_damage);
 750         pixman_region32_union(&total_damage, &new_damage,
 751                               &output->previous_damage_region);
 752         pixman_region32_copy(&output->previous_damage_region, &new_damage);
 753
 754         hw_cursor = NULL;
 755         if (ec->focus && ec->fade.spring.current < 0.001) {
 756                 hw_cursor = (struct wlsc_input_device *) ec->input_device;
 757                 if (output->set_hardware_cursor(output, hw_cursor) < 0)
 758                         hw_cursor = NULL;
 759         } else {
 760                 output->set_hardware_cursor(output, NULL);
 761         }
 762
 763         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 764
 765         if (es->visual == &ec->compositor.rgb_visual && hw_cursor) {
 766                 if (output->prepare_scanout_surface(output, es) == 0) {
 767                         /* We're drawing nothing now,
 768                          * draw the damaged regions later. */
 769                         pixman_region32_union(&ec->damage_region,
 770                                               &ec->damage_region,
 771                                               &total_damage);
 772
 773                         output->scanout_buffer = es->buffer;
 774                         output->scanout_buffer->busy_count++;
 775
 776                         wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 777                         wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 778                                        &output->scanout_buffer_destroy_listener.link);
 779
 780                         return;
 781                 }
 782         }
 783
 784         if (es->fullscreen_output == output) {
 785                 if (es->width < output->current->width ||
 786                     es->height < output->current->height)
 787                         glClear(GL_COLOR_BUFFER_BIT);
 788                 wlsc_surface_draw(es, output, &total_damage);
 789         } else {
 790                 if (output->background)
 791                         wlsc_surface_draw(output->background,
 792                                           output, &total_damage);
 793                 else
 794                         fade_output(output, 1.0, &total_damage);
 795
 796                 glUseProgram(ec->texture_shader.program);
 797                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 798                         if (ec->overlay == es)
 799                                 continue;
 800
 801                         wlsc_surface_draw(es, output, &total_damage);
 802                 }
 803         }
 804
 805         if (ec->overlay)
 806                 wlsc_surface_draw(ec->overlay, output, &total_damage);
 807
 808         if (ec->focus)
 809                 wl_list_for_each(eid, &ec->input_device_list, link) {
 810                         if (&eid->input_device != ec->input_device ||
 811                             eid != hw_cursor)
 812                                 wlsc_surface_draw(eid->sprite, output,
 813                                                   &total_damage);
 814                 }
 815
 816         if (ec->fade.spring.current > 0.001)
 817                 fade_output(output, ec->fade.spring.current, &total_damage);
 818 }
 819
 820 static void
 821 repaint(void *data, int msecs)
 822 {
 823         struct wlsc_output *output = data;
 824         struct wlsc_compositor *compositor = output->compositor;
 825         struct wlsc_surface *es;
 826         struct wlsc_animation *animation, *next;
 827
 828         wlsc_output_repaint(output);
 829         output->repaint_needed = 0;
 830         output->repaint_scheduled = 1;
 831         output->present(output);
 832
 833         /* FIXME: Keep the surfaces in an per-output list. */
 834         wl_list_for_each(es, &compositor->surface_list, link) {
 835                 if (es->output == output) {
 836                         wl_display_post_frame(compositor->wl_display,
 837                                               &es->surface, msecs);
 838                 }
 839         }
 840
 841         wl_list_for_each_safe(animation, next,
 842                               &compositor->animation_list, link)
 843                 animation->frame(animation, output, msecs);
 844 }
 845
 846 static void
 847 idle_repaint(void *data)
 848 {
 849         repaint(data, wlsc_compositor_get_time());
 850 }
 851
 852 WL_EXPORT void
 853 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 854 {
 855         wlsc_buffer_post_release(output->scanout_buffer);
 856         output->scanout_buffer = NULL;
 857         output->repaint_scheduled = 0;
 858
 859         if (output->repaint_needed)
 860                 repaint(output, msecs);
 861 }
 862
 863 WL_EXPORT void
 864 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 865 {
 866         struct wlsc_output *output;
 867         struct wl_event_loop *loop;
 868
 869         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 870                 return;
 871
 872         loop = wl_display_get_event_loop(compositor->wl_display);
 873         wl_list_for_each(output, &compositor->output_list, link) {
 874                 output->repaint_needed = 1;
 875                 if (output->repaint_scheduled)
 876                         continue;
 877
 878                 wl_event_loop_add_idle(loop, idle_repaint, output);
 879                 output->repaint_scheduled = 1;
 880         }
 881 }
 882
 883 WL_EXPORT void
 884 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 885 {
 886         int done;
 887
 888         done = wlsc_spring_done(&compositor->fade.spring);
 889         compositor->fade.spring.target = tint;
 890         if (wlsc_spring_done(&compositor->fade.spring))
 891                 return;
 892
 893         if (done)
 894                 compositor->fade.spring.timestamp =
 895                         wlsc_compositor_get_time();
 896
 897         wlsc_compositor_damage_all(compositor);
 898         if (wl_list_empty(&compositor->fade.animation.link))
 899                 wl_list_insert(compositor->animation_list.prev,
 900                                &compositor->fade.animation.link);
 901 }
 902
 903 static void
 904 surface_destroy(struct wl_client *client,
 905                 struct wl_surface *surface)
 906 {
 907         wl_resource_destroy(&surface->resource, client,
 908                             wlsc_compositor_get_time());
 909 }
 910
 911 WL_EXPORT void
 912 wlsc_surface_assign_output(struct wlsc_surface *es)
 913 {
 914         struct wlsc_compositor *ec = es->compositor;
 915         struct wlsc_output *output;
 916
 917         struct wlsc_output *tmp = es->output;
 918         es->output = NULL;
 919
 920         wl_list_for_each(output, &ec->output_list, link) {
 921                 if (pixman_region32_contains_point(&output->region,
 922                                                    es->x, es->y, NULL)) {
 923                         if (output != tmp)
 924                                 printf("assiging surface %p to output %p\n",
 925                                        es, output);
 926                         es->output = output;
 927                 }
 928         }
 929
 930         if (es->output == NULL) {
 931                 printf("no output found\n");
 932                 es->output = container_of(ec->output_list.next,
 933                                           struct wlsc_output, link);
 934         }
 935 }
 936
 937 static void
 938 surface_attach(struct wl_client *client,
 939                struct wl_surface *surface, struct wl_buffer *buffer,
 940                int32_t x, int32_t y)
 941 {
 942         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 943
 944         /* FIXME: This damages the entire old surface, but we should
 945          * really just damage the part that's no longer covered by the
 946          * surface.  Anything covered by the new surface will be
 947          * damaged by the client. */
 948         if (es->buffer)
 949                 wlsc_surface_damage(es);
 950
 951         buffer->busy_count++;
 952         wlsc_buffer_post_release(es->buffer);
 953
 954         es->buffer = buffer;
 955         wl_list_remove(&es->buffer_destroy_listener.link);
 956         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 957                        &es->buffer_destroy_listener.link);
 958
 959         es->x += x;
 960         es->y += y;
 961         es->width = buffer->width;
 962         es->height = buffer->height;
 963         if (x != 0 || y != 0)
 964                 wlsc_surface_assign_output(es);
 965         if (es->visual == NULL)
 966                 wl_list_insert(&es->compositor->surface_list, &es->link);
 967
 968         wlsc_buffer_attach(buffer, surface);
 969
 970         es->compositor->shell->attach(es->compositor->shell, es);
 971 }
 972
 973 static void
 974 surface_damage(struct wl_client *client,
 975                struct wl_surface *surface,
 976                int32_t x, int32_t y, int32_t width, int32_t height)
 977 {
 978         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 979
 980         wlsc_surface_damage_rectangle(es, x, y, width, height);
 981 }
 982
 983 const static struct wl_surface_interface surface_interface = {
 984         surface_destroy,
 985         surface_attach,
 986         surface_damage
 987 };
 988
 989 static void
 990 wlsc_input_device_attach(struct wlsc_input_device *device,
 991                          int x, int y, int width, int height)
 992 {
 993         wlsc_surface_damage(device->sprite);
 994
 995         device->hotspot_x = x;
 996         device->hotspot_y = y;
 997
 998         device->sprite->x = device->input_device.x - device->hotspot_x;
 999         device->sprite->y = device->input_device.y - device->hotspot_y;
1000         device->sprite->width = width;
1001         device->sprite->height = height;
1002
1003         wlsc_surface_damage(device->sprite);
1004 }
1005
1006 static void
1007 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1008                                 struct wl_buffer *buffer, int x, int y)
1009 {
1010         wlsc_buffer_attach(buffer, &device->sprite->surface);
1011         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1012 }
1013
1014 static void
1015 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1016                                 struct wlsc_sprite *sprite, int x, int y)
1017 {
1018         wlsc_sprite_attach(sprite, &device->sprite->surface);
1019         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1020 }
1021
1022 WL_EXPORT void
1023 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1024                                     enum wlsc_pointer_type type)
1025 {
1026         struct wlsc_compositor *compositor =
1027                 (struct wlsc_compositor *) device->input_device.compositor;
1028
1029         wlsc_input_device_attach_sprite(device,
1030                                         compositor->pointer_sprites[type],
1031                                         pointer_images[type].hotspot_x,
1032                                         pointer_images[type].hotspot_y);
1033 }
1034
1035 static void
1036 compositor_create_surface(struct wl_client *client,
1037                           struct wl_compositor *compositor, uint32_t id)
1038 {
1039         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1040         struct wlsc_surface *surface;
1041
1042         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1043         if (surface == NULL) {
1044                 wl_client_post_no_memory(client);
1045                 return;
1046         }
1047
1048         surface->surface.resource.destroy = destroy_surface;
1049
1050         surface->surface.resource.object.id = id;
1051         surface->surface.resource.object.interface = &wl_surface_interface;
1052         surface->surface.resource.object.implementation =
1053                 (void (**)(void)) &surface_interface;
1054         surface->surface.client = client;
1055
1056         wl_client_add_resource(client, &surface->surface.resource);
1057 }
1058
1059 const static struct wl_compositor_interface compositor_interface = {
1060         compositor_create_surface,
1061 };
1062
1063 static void
1064 wlsc_surface_transform(struct wlsc_surface *surface,
1065                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1066 {
1067         *sx = x - surface->x;
1068         *sy = y - surface->y;
1069 }
1070
1071 WL_EXPORT struct wlsc_surface *
1072 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1073 {
1074         struct wlsc_compositor *ec =
1075                 (struct wlsc_compositor *) device->compositor;
1076         struct wlsc_surface *es;
1077
1078         wl_list_for_each(es, &ec->surface_list, link) {
1079                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1080                 if (0 <= *sx && *sx < es->width &&
1081                     0 <= *sy && *sy < es->height)
1082                         return es;
1083         }
1084
1085         return NULL;
1086 }
1087
1088
1089 static void
1090 motion_grab_motion(struct wl_grab *grab,
1091                    uint32_t time, int32_t x, int32_t y)
1092 {
1093         struct wlsc_input_device *device =
1094                 (struct wlsc_input_device *) grab->input_device;
1095         struct wlsc_surface *es =
1096                 (struct wlsc_surface *) device->input_device.pointer_focus;
1097         int32_t sx, sy;
1098
1099         wlsc_surface_transform(es, x, y, &sx, &sy);
1100         wl_client_post_event(es->surface.client,
1101                              &device->input_device.object,
1102                              WL_INPUT_DEVICE_MOTION,
1103                              time, x, y, sx, sy);
1104 }
1105
1106 static void
1107 motion_grab_button(struct wl_grab *grab,
1108                    uint32_t time, int32_t button, int32_t state)
1109 {
1110         wl_client_post_event(grab->input_device->pointer_focus->client,
1111                              &grab->input_device->object,
1112                              WL_INPUT_DEVICE_BUTTON,
1113                              time, button, state);
1114 }
1115
1116 static void
1117 motion_grab_end(struct wl_grab *grab, uint32_t time)
1118 {
1119 }
1120
1121 static const struct wl_grab_interface motion_grab_interface = {
1122         motion_grab_motion,
1123         motion_grab_button,
1124         motion_grab_end
1125 };
1126
1127 WL_EXPORT void
1128 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1129 {
1130         if (compositor->idle_inhibit)
1131                 return;
1132
1133         wlsc_compositor_fade(compositor, 0.0);
1134         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1135
1136         wl_event_source_timer_update(compositor->idle_source,
1137                                      option_idle_time * 1000);
1138 }
1139
1140 static void
1141 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1142 {
1143         wlsc_compositor_wake(compositor);
1144         compositor->idle_inhibit++;
1145 }
1146
1147 static void
1148 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1149 {
1150         compositor->idle_inhibit--;
1151         wlsc_compositor_wake(compositor);
1152 }
1153
1154 static int
1155 idle_handler(void *data)
1156 {
1157         struct wlsc_compositor *compositor = data;
1158
1159         if (compositor->idle_inhibit)
1160                 return 1;
1161
1162         wlsc_compositor_fade(compositor, 1.0);
1163
1164         return 1;
1165 }
1166
1167 WL_EXPORT void
1168 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1169 {
1170         struct wlsc_surface *es;
1171         struct wlsc_compositor *ec =
1172                 (struct wlsc_compositor *) device->compositor;
1173         struct wlsc_output *output;
1174         const struct wl_grab_interface *interface;
1175         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1176         int32_t sx, sy;
1177         int x_valid = 0, y_valid = 0;
1178         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1179
1180         wlsc_compositor_wake(ec);
1181
1182         wl_list_for_each(output, &ec->output_list, link) {
1183                 if (output->x <= x && x <= output->x + output->current->width)
1184                         x_valid = 1;
1185
1186                 if (output->y <= y && y <= output->y + output->current->height)
1187                         y_valid = 1;
1188
1189                 /* FIXME: calculate this only on output addition/deletion */
1190                 if (output->x < min_x)
1191                         min_x = output->x;
1192                 if (output->y < min_y)
1193                         min_y = output->y;
1194
1195                 if (output->x + output->current->width > max_x)
1196                         max_x = output->x + output->current->width;
1197                 if (output->y + output->current->height > max_y)
1198                         max_y = output->y + output->current->height;
1199         }
1200
1201         if (!x_valid) {
1202                 if (x < min_x)
1203                         x = min_x;
1204                 else if (x >= max_x)
1205                         x = max_x;
1206         }
1207         if (!y_valid) {
1208                 if (y < min_y)
1209                         y = min_y;
1210                 else  if (y >= max_y)
1211                         y = max_y;
1212         }
1213
1214         device->x = x;
1215         device->y = y;
1216
1217         if (device->grab) {
1218                 interface = device->grab->interface;
1219                 interface->motion(device->grab, time, x, y);
1220         } else {
1221                 es = pick_surface(device, &sx, &sy);
1222                 wl_input_device_set_pointer_focus(device,
1223                                                   &es->surface,
1224                                                   time, x, y, sx, sy);
1225                 if (es)
1226                         wl_client_post_event(es->surface.client,
1227                                              &device->object,
1228                                              WL_INPUT_DEVICE_MOTION,
1229                                              time, x, y, sx, sy);
1230         }
1231
1232         wlsc_surface_damage(wd->sprite);
1233
1234         wd->sprite->x = device->x - wd->hotspot_x;
1235         wd->sprite->y = device->y - wd->hotspot_y;
1236
1237         wlsc_surface_damage(wd->sprite);
1238 }
1239
1240 WL_EXPORT void
1241 wlsc_surface_activate(struct wlsc_surface *surface,
1242                       struct wlsc_input_device *device, uint32_t time)
1243 {
1244         struct wlsc_shell *shell = surface->compositor->shell;
1245
1246         wlsc_surface_raise(surface);
1247         if (device->selection)
1248                 shell->set_selection_focus(shell,
1249                                            device->selection,
1250                                            &surface->surface, time);
1251
1252         wl_input_device_set_keyboard_focus(&device->input_device,
1253                                            &surface->surface,
1254                                            time);
1255 }
1256
1257 struct wlsc_binding {
1258         uint32_t key;
1259         uint32_t button;
1260         uint32_t modifier;
1261         wlsc_binding_handler_t handler;
1262         void *data;
1263         struct wl_list link;
1264 };
1265
1266 WL_EXPORT void
1267 notify_button(struct wl_input_device *device,
1268               uint32_t time, int32_t button, int32_t state)
1269 {
1270         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1271         struct wlsc_compositor *compositor =
1272                 (struct wlsc_compositor *) device->compositor;
1273         struct wlsc_binding *b;
1274         struct wlsc_surface *surface =
1275                 (struct wlsc_surface *) device->pointer_focus;
1276
1277         if (state)
1278                 wlsc_compositor_idle_inhibit(compositor);
1279         else
1280                 wlsc_compositor_idle_release(compositor);
1281
1282         if (state && surface && device->grab == NULL) {
1283                 wlsc_surface_activate(surface, wd, time);
1284                 wl_input_device_start_grab(device,
1285                                            &device->motion_grab,
1286                                            button, time);
1287         }
1288
1289         wl_list_for_each(b, &compositor->binding_list, link) {
1290                 if (b->button == button &&
1291                     b->modifier == wd->modifier_state && state) {
1292                         b->handler(&wd->input_device,
1293                                    time, 0, button, state, b->data);
1294                         break;
1295                 }
1296         }
1297
1298         if (device->grab)
1299                 device->grab->interface->button(device->grab, time,
1300                                                 button, state);
1301
1302         if (!state && device->grab && device->grab_button == button)
1303                 wl_input_device_end_grab(device, time);
1304 }
1305
1306 static void
1307 terminate_binding(struct wl_input_device *device, uint32_t time,
1308                   uint32_t key, uint32_t button, uint32_t state, void *data)
1309 {
1310         struct wlsc_compositor *compositor = data;
1311
1312         if (state)
1313                 wl_display_terminate(compositor->wl_display);
1314 }
1315
1316 WL_EXPORT struct wlsc_binding *
1317 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1318                             uint32_t key, uint32_t button, uint32_t modifier,
1319                             wlsc_binding_handler_t handler, void *data)
1320 {
1321         struct wlsc_binding *binding;
1322
1323         binding = malloc(sizeof *binding);
1324         if (binding == NULL)
1325                 return NULL;
1326
1327         binding->key = key;
1328         binding->button = button;
1329         binding->modifier = modifier;
1330         binding->handler = handler;
1331         binding->data = data;
1332         wl_list_insert(compositor->binding_list.prev, &binding->link);
1333
1334         return binding;
1335 }
1336
1337 WL_EXPORT void
1338 wlsc_binding_destroy(struct wlsc_binding *binding)
1339 {
1340         wl_list_remove(&binding->link);
1341         free(binding);
1342 }
1343
1344 static void
1345 update_modifier_state(struct wlsc_input_device *device,
1346                       uint32_t key, uint32_t state)
1347 {
1348         uint32_t modifier;
1349
1350         switch (key) {
1351         case KEY_LEFTCTRL:
1352         case KEY_RIGHTCTRL:
1353                 modifier = MODIFIER_CTRL;
1354                 break;
1355
1356         case KEY_LEFTALT:
1357         case KEY_RIGHTALT:
1358                 modifier = MODIFIER_ALT;
1359                 break;
1360
1361         case KEY_LEFTMETA:
1362         case KEY_RIGHTMETA:
1363                 modifier = MODIFIER_SUPER;
1364                 break;
1365
1366         default:
1367                 modifier = 0;
1368                 break;
1369         }
1370
1371         if (state)
1372                 device->modifier_state |= modifier;
1373         else
1374                 device->modifier_state &= ~modifier;
1375 }
1376
1377 WL_EXPORT void
1378 notify_key(struct wl_input_device *device,
1379            uint32_t time, uint32_t key, uint32_t state)
1380 {
1381         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1382         struct wlsc_compositor *compositor =
1383                 (struct wlsc_compositor *) device->compositor;
1384         uint32_t *k, *end;
1385         struct wlsc_binding *b;
1386
1387         if (state)
1388                 wlsc_compositor_idle_inhibit(compositor);
1389         else
1390                 wlsc_compositor_idle_release(compositor);
1391
1392         wl_list_for_each(b, &compositor->binding_list, link) {
1393                 if (b->key == key &&
1394                     b->modifier == wd->modifier_state) {
1395                         b->handler(&wd->input_device,
1396                                    time, key, 0, state, b->data);
1397                         break;
1398                 }
1399         }
1400
1401         update_modifier_state(wd, key, state);
1402         end = device->keys.data + device->keys.size;
1403         for (k = device->keys.data; k < end; k++) {
1404                 if (*k == key)
1405                         *k = *--end;
1406         }
1407         device->keys.size = (void *) end - device->keys.data;
1408         if (state) {
1409                 k = wl_array_add(&device->keys, sizeof *k);
1410                 *k = key;
1411         }
1412
1413         if (device->keyboard_focus != NULL)
1414                 wl_client_post_event(device->keyboard_focus->client,
1415                                      &device->object,
1416                                      WL_INPUT_DEVICE_KEY, time, key, state);
1417 }
1418
1419 WL_EXPORT void
1420 notify_pointer_focus(struct wl_input_device *device,
1421                      uint32_t time, struct wlsc_output *output,
1422                      int32_t x, int32_t y)
1423 {
1424         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1425         struct wlsc_compositor *compositor =
1426                 (struct wlsc_compositor *) device->compositor;
1427         struct wlsc_surface *es;
1428         int32_t sx, sy;
1429
1430         if (output) {
1431                 device->x = x;
1432                 device->y = y;
1433                 es = pick_surface(device, &sx, &sy);
1434                 wl_input_device_set_pointer_focus(device,
1435                                                   &es->surface,
1436                                                   time, x, y, sx, sy);
1437
1438                 compositor->focus = 1;
1439
1440                 wd->sprite->x = device->x - wd->hotspot_x;
1441                 wd->sprite->y = device->y - wd->hotspot_y;
1442         } else {
1443                 wl_input_device_set_pointer_focus(device, NULL,
1444                                                   time, 0, 0, 0, 0);
1445                 compositor->focus = 0;
1446         }
1447
1448         wlsc_surface_damage(wd->sprite);
1449 }
1450
1451 WL_EXPORT void
1452 notify_keyboard_focus(struct wl_input_device *device,
1453                       uint32_t time, struct wlsc_output *output,
1454                       struct wl_array *keys)
1455 {
1456         struct wlsc_input_device *wd =
1457                 (struct wlsc_input_device *) device;
1458         struct wlsc_compositor *compositor =
1459                 (struct wlsc_compositor *) device->compositor;
1460         struct wlsc_surface *es;
1461         uint32_t *k, *end;
1462
1463         if (!wl_list_empty(&compositor->surface_list))
1464                 es = container_of(compositor->surface_list.next,
1465                                   struct wlsc_surface, link);
1466         else
1467                 es = NULL;
1468
1469         if (output) {
1470                 wl_array_copy(&wd->input_device.keys, keys);
1471                 wd->modifier_state = 0;
1472                 end = device->keys.data + device->keys.size;
1473                 for (k = device->keys.data; k < end; k++) {
1474                         wlsc_compositor_idle_inhibit(compositor);
1475                         update_modifier_state(wd, *k, 1);
1476                 }
1477
1478                 wl_input_device_set_keyboard_focus(&wd->input_device,
1479                                                    &es->surface, time);
1480         } else {
1481                 end = device->keys.data + device->keys.size;
1482                 for (k = device->keys.data; k < end; k++)
1483                         wlsc_compositor_idle_release(compositor);
1484
1485                 wd->modifier_state = 0;
1486                 wl_input_device_set_keyboard_focus(&wd->input_device,
1487                                                    NULL, time);
1488         }
1489 }
1490
1491
1492 static void
1493 input_device_attach(struct wl_client *client,
1494                     struct wl_input_device *device_base,
1495                     uint32_t time,
1496                     struct wl_buffer *buffer, int32_t x, int32_t y)
1497 {
1498         struct wlsc_input_device *device =
1499                 (struct wlsc_input_device *) device_base;
1500
1501         if (time < device->input_device.pointer_focus_time)
1502                 return;
1503         if (device->input_device.pointer_focus == NULL)
1504                 return;
1505         if (device->input_device.pointer_focus->client != client)
1506                 return;
1507
1508         if (buffer == NULL) {
1509                 wlsc_input_device_set_pointer_image(device,
1510                                                     WLSC_POINTER_LEFT_PTR);
1511                 return;
1512         }
1513
1514         wlsc_input_device_attach_buffer(device, buffer, x, y);
1515 }
1516
1517 const static struct wl_input_device_interface input_device_interface = {
1518         input_device_attach,
1519 };
1520
1521 WL_EXPORT void
1522 wlsc_input_device_init(struct wlsc_input_device *device,
1523                        struct wlsc_compositor *ec)
1524 {
1525         wl_input_device_init(&device->input_device, &ec->compositor);
1526
1527         device->input_device.object.interface = &wl_input_device_interface;
1528         device->input_device.object.implementation =
1529                 (void (**)(void)) &input_device_interface;
1530         wl_display_add_object(ec->wl_display, &device->input_device.object);
1531         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1532
1533         device->sprite = wlsc_surface_create(ec,
1534                                              device->input_device.x,
1535                                              device->input_device.y, 32, 32);
1536         device->hotspot_x = 16;
1537         device->hotspot_y = 16;
1538         device->modifier_state = 0;
1539
1540         device->input_device.motion_grab.interface = &motion_grab_interface;
1541
1542         wl_list_insert(ec->input_device_list.prev, &device->link);
1543
1544         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1545 }
1546
1547 static void
1548 wlsc_output_post_geometry(struct wl_client *client,
1549                           struct wl_object *global, uint32_t version)
1550 {
1551         struct wlsc_output *output =
1552                 container_of(global, struct wlsc_output, object);
1553         struct wlsc_mode *mode;
1554
1555         wl_client_post_event(client, global,
1556                              WL_OUTPUT_GEOMETRY,
1557                              output->x,
1558                              output->y,
1559                              output->mm_width,
1560                              output->mm_height,
1561                              output->subpixel,
1562                              output->make, output->model);
1563
1564         wl_list_for_each (mode, &output->mode_list, link) {
1565                 wl_client_post_event(client, global,
1566                                      WL_OUTPUT_MODE,
1567                                      mode->flags,
1568                                      mode->width, mode->height, mode->refresh);
1569         }
1570 }
1571
1572 static const char vertex_shader[] =
1573         "uniform mat4 proj;\n"
1574         "attribute vec2 position;\n"
1575         "attribute vec2 texcoord;\n"
1576         "varying vec2 v_texcoord;\n"
1577         "void main()\n"
1578         "{\n"
1579         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1580         "   v_texcoord = texcoord;\n"
1581         "}\n";
1582
1583 static const char texture_fragment_shader[] =
1584         "precision mediump float;\n"
1585         "varying vec2 v_texcoord;\n"
1586         "uniform sampler2D tex;\n"
1587         "void main()\n"
1588         "{\n"
1589         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1590         "}\n";
1591
1592 static const char solid_fragment_shader[] =
1593         "precision mediump float;\n"
1594         "uniform vec4 color;\n"
1595         "void main()\n"
1596         "{\n"
1597         "   gl_FragColor = color\n;"
1598         "}\n";
1599
1600 static int
1601 compile_shader(GLenum type, const char *source)
1602 {
1603         GLuint s;
1604         char msg[512];
1605         GLint status;
1606
1607         s = glCreateShader(type);
1608         glShaderSource(s, 1, &source, NULL);
1609         glCompileShader(s);
1610         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1611         if (!status) {
1612                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1613                 fprintf(stderr, "shader info: %s\n", msg);
1614                 return GL_NONE;
1615         }
1616
1617         return s;
1618 }
1619
1620 static int
1621 wlsc_shader_init(struct wlsc_shader *shader,
1622                  const char *vertex_source, const char *fragment_source)
1623 {
1624         char msg[512];
1625         GLint status;
1626
1627         shader->vertex_shader =
1628                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1629         shader->fragment_shader =
1630                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1631
1632         shader->program = glCreateProgram();
1633         glAttachShader(shader->program, shader->vertex_shader);
1634         glAttachShader(shader->program, shader->fragment_shader);
1635         glBindAttribLocation(shader->program, 0, "position");
1636         glBindAttribLocation(shader->program, 1, "texcoord");
1637
1638         glLinkProgram(shader->program);
1639         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1640         if (!status) {
1641                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1642                 fprintf(stderr, "link info: %s\n", msg);
1643                 return -1;
1644         }
1645
1646         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1647         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1648
1649         return 0;
1650 }
1651
1652 static int
1653 init_solid_shader(struct wlsc_shader *shader,
1654                   GLuint vertex_shader, const char *fragment_source)
1655 {
1656         GLint status;
1657         char msg[512];
1658
1659         shader->vertex_shader = vertex_shader;
1660         shader->fragment_shader =
1661                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1662
1663         shader->program = glCreateProgram();
1664         glAttachShader(shader->program, shader->vertex_shader);
1665         glAttachShader(shader->program, shader->fragment_shader);
1666         glBindAttribLocation(shader->program, 0, "position");
1667         glBindAttribLocation(shader->program, 1, "texcoord");
1668
1669         glLinkProgram(shader->program);
1670         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1671         if (!status) {
1672                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1673                 fprintf(stderr, "link info: %s\n", msg);
1674                 return -1;
1675         }
1676
1677         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1678         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1679
1680         return 0;
1681 }
1682
1683 WL_EXPORT void
1684 wlsc_output_destroy(struct wlsc_output *output)
1685 {
1686         pixman_region32_fini(&output->region);
1687         pixman_region32_fini(&output->previous_damage_region);
1688         destroy_surface(&output->background->surface.resource, NULL);
1689 }
1690
1691 WL_EXPORT void
1692 wlsc_output_move(struct wlsc_output *output, int x, int y)
1693 {
1694         struct wlsc_compositor *c = output->compositor;
1695         int flip;
1696
1697         output->x = x;
1698         output->y = y;
1699
1700         if (output->background) {
1701                 output->background->x = x;
1702                 output->background->y = y;
1703         }
1704
1705         pixman_region32_init(&output->previous_damage_region);
1706         pixman_region32_init_rect(&output->region, x, y,
1707                                   output->current->width,
1708                                   output->current->height);
1709
1710         wlsc_matrix_init(&output->matrix);
1711         wlsc_matrix_translate(&output->matrix,
1712                               -output->x - output->current->width / 2.0,
1713                               -output->y - output->current->height / 2.0, 0);
1714
1715         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1716         wlsc_matrix_scale(&output->matrix,
1717                           2.0 / output->current->width,
1718                           flip * 2.0 / output->current->height, 1);
1719
1720         pixman_region32_union(&c->damage_region,
1721                               &c->damage_region, &output->region);
1722 }
1723
1724 WL_EXPORT void
1725 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1726                  int x, int y, int width, int height, uint32_t flags)
1727 {
1728         output->compositor = c;
1729         output->x = x;
1730         output->y = y;
1731         output->mm_width = width;
1732         output->mm_height = height;
1733
1734         output->background =
1735                 background_create(output, option_background);
1736
1737         output->flags = flags;
1738         wlsc_output_move(output, x, y);
1739
1740         output->scanout_buffer_destroy_listener.func =
1741                 output_handle_scanout_buffer_destroy;
1742         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1743
1744         output->object.interface = &wl_output_interface;
1745         wl_display_add_object(c->wl_display, &output->object);
1746         wl_display_add_global(c->wl_display, &output->object,
1747                               wlsc_output_post_geometry);
1748 }
1749
1750 static void
1751 shm_buffer_created(struct wl_buffer *buffer)
1752 {
1753         struct wl_list *surfaces_attached_to;
1754
1755         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1756         if (!surfaces_attached_to) {
1757                 buffer->user_data = NULL;
1758                 return;
1759         }
1760
1761         wl_list_init(surfaces_attached_to);
1762
1763         buffer->user_data = surfaces_attached_to;
1764 }
1765
1766 static void
1767 shm_buffer_damaged(struct wl_buffer *buffer,
1768                    int32_t x, int32_t y, int32_t width, int32_t height)
1769 {
1770         struct wl_list *surfaces_attached_to = buffer->user_data;
1771         struct wlsc_surface *es;
1772         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1773
1774         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1775                 glBindTexture(GL_TEXTURE_2D, es->texture);
1776                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1777                              tex_width, buffer->height, 0,
1778                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1779                              wl_shm_buffer_get_data(buffer));
1780                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1781                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1782         }
1783 }
1784
1785 static void
1786 shm_buffer_destroyed(struct wl_buffer *buffer)
1787 {
1788         struct wl_list *surfaces_attached_to = buffer->user_data;
1789         struct wlsc_surface *es, *next;
1790
1791         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1792                 wl_list_remove(&es->buffer_link);
1793                 wl_list_init(&es->buffer_link);
1794         }
1795
1796         free(surfaces_attached_to);
1797 }
1798
1799 const static struct wl_shm_callbacks shm_callbacks = {
1800         shm_buffer_created,
1801         shm_buffer_damaged,
1802         shm_buffer_destroyed
1803 };
1804
1805 WL_EXPORT int
1806 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1807 {
1808         struct wl_event_loop *loop;
1809         const char *extensions;
1810
1811         ec->wl_display = display;
1812
1813         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1814
1815         ec->shm = wl_shm_init(display, &shm_callbacks);
1816
1817         ec->image_target_texture_2d =
1818                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1819         ec->image_target_renderbuffer_storage = (void *)
1820                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1821         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1822         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1823         ec->bind_display =
1824                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1825         ec->unbind_display =
1826                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1827
1828         extensions = (const char *) glGetString(GL_EXTENSIONS);
1829         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1830                 fprintf(stderr,
1831                         "GL_EXT_texture_format_BGRA8888 not available\n");
1832                 return -1;
1833         }
1834
1835         extensions =
1836                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1837         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1838                 ec->has_bind_display = 1;
1839         if (ec->has_bind_display)
1840                 ec->bind_display(ec->display, ec->wl_display);
1841
1842         wl_list_init(&ec->surface_list);
1843         wl_list_init(&ec->input_device_list);
1844         wl_list_init(&ec->output_list);
1845         wl_list_init(&ec->binding_list);
1846         wl_list_init(&ec->animation_list);
1847         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1848         ec->fade.animation.frame = fade_frame;
1849         wl_list_init(&ec->fade.animation.link);
1850
1851         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1852                                     MODIFIER_CTRL | MODIFIER_ALT,
1853                                     terminate_binding, ec);
1854
1855         create_pointer_images(ec);
1856
1857         screenshooter_create(ec);
1858
1859         glActiveTexture(GL_TEXTURE0);
1860
1861         if (wlsc_shader_init(&ec->texture_shader,
1862                              vertex_shader, texture_fragment_shader) < 0)
1863                 return -1;
1864         if (init_solid_shader(&ec->solid_shader,
1865                               ec->texture_shader.vertex_shader,
1866                               solid_fragment_shader) < 0)
1867                 return -1;
1868
1869         loop = wl_display_get_event_loop(ec->wl_display);
1870         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1871         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1872
1873         pixman_region32_init(&ec->damage_region);
1874         wlsc_compositor_schedule_repaint(ec);
1875
1876         return 0;
1877 }
1878
1879 static int on_term_signal(int signal_number, void *data)
1880 {
1881         struct wlsc_compositor *ec = data;
1882
1883         wl_display_terminate(ec->wl_display);
1884
1885         return 1;
1886 }
1887
1888 static void *
1889 load_module(const char *name, const char *entrypoint, void **handle)
1890 {
1891         char path[PATH_MAX];
1892         void *module, *init;
1893
1894         if (name[0] != '/')
1895                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1896         else
1897                 snprintf(path, sizeof path, "%s", name);
1898
1899         module = dlopen(path, RTLD_LAZY);
1900         if (!module) {
1901                 fprintf(stderr,
1902                         "failed to load module: %s\n", dlerror());
1903                 return NULL;
1904         }
1905
1906         init = dlsym(module, entrypoint);
1907         if (!init) {
1908                 fprintf(stderr,
1909                         "failed to lookup init function: %s\n", dlerror());
1910                 return NULL;
1911         }
1912
1913         return init;
1914 }
1915
1916 int main(int argc, char *argv[])
1917 {
1918         struct wl_display *display;
1919         struct wlsc_compositor *ec;
1920         struct wl_event_loop *loop;
1921         int o, xserver = 0;
1922         void *shell_module, *backend_module;
1923         int (*shell_init)(struct wlsc_compositor *ec);
1924         struct wlsc_compositor
1925                 *(*backend_init)(struct wl_display *display, char *options);
1926         char *backend = NULL;
1927         char *backend_options = "";
1928         char *shell = NULL;
1929         char *p;
1930
1931         static const char opts[] = "B:b:o:S:i:s:x";
1932         static const struct option longopts[ ] = {
1933                 { "backend", 1, NULL, 'B' },
1934                 { "backend-options", 1, NULL, 'o' },
1935                 { "background", 1, NULL, 'b' },
1936                 { "socket", 1, NULL, 'S' },
1937                 { "idle-time", 1, NULL, 'i' },
1938                 { "shell", 1, NULL, 's' },
1939                 { "xserver", 0, NULL, 'x' },
1940                 { NULL, }
1941         };
1942
1943         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1944                 switch (o) {
1945                 case 'b':
1946                         option_background = optarg;
1947                         break;
1948                 case 'B':
1949                         backend = optarg;
1950                         break;
1951                 case 'o':
1952                         backend_options = optarg;
1953                         break;
1954                 case 'S':
1955                         option_socket_name = optarg;
1956                         break;
1957                 case 'i':
1958                         option_idle_time = strtol(optarg, &p, 0);
1959                         if (*p != '\0') {
1960                                 fprintf(stderr,
1961                                         "invalid idle time option: %s\n",
1962                                         optarg);
1963                                 exit(EXIT_FAILURE);
1964                         }
1965                         break;
1966                 case 's':
1967                         shell = optarg;
1968                         break;
1969                 case 'x':
1970                         xserver = 1;
1971                         break;
1972                 }
1973         }
1974
1975         display = wl_display_create();
1976
1977         ec = NULL;
1978
1979         if (!backend) {
1980                 if (getenv("WAYLAND_DISPLAY"))
1981                         backend = "wayland-backend.so";
1982                 else if (getenv("DISPLAY"))
1983                         backend = "x11-backend.so";
1984                 else if (getenv("OPENWFD"))
1985                         backend = "openwfd-backend.so";
1986                 else
1987                         backend = "drm-backend.so";
1988         }
1989
1990         if (!shell)
1991                 shell = "desktop-shell.so";
1992
1993         backend_init = load_module(backend, "backend_init", &backend_module);
1994         if (!backend_init)
1995                 exit(EXIT_FAILURE);
1996
1997         shell_init = load_module(shell, "shell_init", &shell_module);
1998         if (!shell_init)
1999                 exit(EXIT_FAILURE);
2000
2001         ec = backend_init(display, backend_options);
2002         if (ec == NULL) {
2003                 fprintf(stderr, "failed to create compositor\n");
2004                 exit(EXIT_FAILURE);
2005         }
2006
2007         if (shell_init(ec) < 0)
2008                 exit(EXIT_FAILURE);
2009
2010         if (xserver)
2011                 wlsc_xserver_init(display);
2012
2013         if (wl_display_add_socket(display, option_socket_name)) {
2014                 fprintf(stderr, "failed to add socket: %m\n");
2015                 exit(EXIT_FAILURE);
2016         }
2017
2018         loop = wl_display_get_event_loop(ec->wl_display);
2019         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
2020         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
2021
2022         wl_list_init(&child_process_list);
2023         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2024
2025         wl_display_run(display);
2026
2027         if (ec->has_bind_display)
2028                 ec->unbind_display(ec->display, display);
2029         wl_display_destroy(display);
2030
2031         ec->destroy(ec);
2032
2033         return 0;
2034 }