compositor/compositor.c

   1 /*
   2  * Copyright © 2010-2011 Intel Corporation
   3  * Copyright © 2008-2011 Kristian Høgsberg
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #define _GNU_SOURCE
  25
  26 #include "config.h"
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdint.h>
  32 #include <limits.h>
  33 #include <stdarg.h>
  34 #include <assert.h>
  35 #include <sys/ioctl.h>
  36 #include <sys/wait.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39 #include <math.h>
  40 #include <linux/input.h>
  41 #include <dlfcn.h>
  42 #include <getopt.h>
  43 #include <signal.h>
  44
  45 #include "wayland-server.h"
  46 #include "compositor.h"
  47
  48 /* The plan here is to generate a random anonymous socket name and
  49  * advertise that through a service on the session dbus.
  50  */
  51 static const char *option_socket_name = NULL;
  52 static int option_idle_time = 300;
  53
  54 static struct wl_list child_process_list;
  55
  56 static int
  57 sigchld_handler(int signal_number, void *data)
  58 {
  59         struct wlsc_process *p;
  60         int status;
  61         pid_t pid;
  62
  63         pid = wait(&status);
  64         wl_list_for_each(p, &child_process_list, link) {
  65                 if (p->pid == pid)
  66                         break;
  67         }
  68
  69         if (&p->link == &child_process_list) {
  70                 fprintf(stderr, "unknown child process exited\n");
  71                 return 1;
  72         }
  73
  74         wl_list_remove(&p->link);
  75         p->cleanup(p, status);
  76
  77         return 1;
  78 }
  79
  80 WL_EXPORT void
  81 wlsc_watch_process(struct wlsc_process *process)
  82 {
  83         wl_list_insert(&child_process_list, &process->link);
  84 }
  85
  86 WL_EXPORT void
  87 wlsc_matrix_init(struct wlsc_matrix *matrix)
  88 {
  89         static const struct wlsc_matrix identity = {
  90                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  91         };
  92
  93         memcpy(matrix, &identity, sizeof identity);
  94 }
  95
  96 static void
  97 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  98 {
  99         struct wlsc_matrix tmp;
 100         const GLfloat *row, *column;
 101         div_t d;
 102         int i, j;
 103
 104         for (i = 0; i < 16; i++) {
 105                 tmp.d[i] = 0;
 106                 d = div(i, 4);
 107                 row = m->d + d.quot * 4;
 108                 column = n->d + d.rem;
 109                 for (j = 0; j < 4; j++)
 110                         tmp.d[i] += row[j] * column[j * 4];
 111         }
 112         memcpy(m, &tmp, sizeof tmp);
 113 }
 114
 115 WL_EXPORT void
 116 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 117 {
 118         struct wlsc_matrix translate = {
 119                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
 120         };
 121
 122         wlsc_matrix_multiply(matrix, &translate);
 123 }
 124
 125 WL_EXPORT void
 126 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 127 {
 128         struct wlsc_matrix scale = {
 129                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
 130         };
 131
 132         wlsc_matrix_multiply(matrix, &scale);
 133 }
 134
 135 static void
 136 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 137 {
 138         int i, j;
 139         struct wlsc_vector t;
 140
 141         for (i = 0; i < 4; i++) {
 142                 t.f[i] = 0;
 143                 for (j = 0; j < 4; j++)
 144                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 145         }
 146
 147         *v = t;
 148 }
 149
 150 WL_EXPORT void
 151 wlsc_spring_init(struct wlsc_spring *spring,
 152                  double k, double current, double target)
 153 {
 154         spring->k = k;
 155         spring->friction = 100.0;
 156         spring->current = current;
 157         spring->previous = current;
 158         spring->target = target;
 159 }
 160
 161 WL_EXPORT void
 162 wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec)
 163 {
 164         double force, v, current, step;
 165
 166         step = (msec - spring->timestamp) / 300.0;
 167         spring->timestamp = msec;
 168
 169         current = spring->current;
 170         v = current - spring->previous;
 171         force = spring->k * (spring->target - current) / 10.0 +
 172                 (spring->previous - current) - v * spring->friction;
 173
 174         spring->current =
 175                 current + (current - spring->previous) + force * step * step;
 176         spring->previous = current;
 177
 178 #if 0
 179         if (spring->current >= 1.0) {
 180 #ifdef TWEENER_BOUNCE
 181                 spring->current = 2.0 - spring->current;
 182                 spring->previous = 2.0 - spring->previous;
 183 #else
 184                 spring->current = 1.0;
 185                 spring->previous = 1.0;
 186 #endif
 187         }
 188
 189         if (spring->current <= 0.0) {
 190                 spring->current = 0.0;
 191                 spring->previous = 0.0;
 192         }
 193 #endif
 194 }
 195
 196 WL_EXPORT int
 197 wlsc_spring_done(struct wlsc_spring *spring)
 198 {
 199         return fabs(spring->previous - spring->target) < 0.0002 &&
 200                 fabs(spring->current - spring->target) < 0.0002;
 201 }
 202
 203 static void
 204 surface_handle_buffer_destroy(struct wl_listener *listener,
 205                               struct wl_resource *resource, uint32_t time)
 206 {
 207         struct wlsc_surface *es = container_of(listener, struct wlsc_surface,
 208                                                buffer_destroy_listener);
 209         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 210
 211         wl_list_init(&es->buffer_destroy_listener.link);
 212         if (es->buffer == buffer)
 213                 es->buffer = NULL;
 214 }
 215
 216 static void
 217 output_handle_scanout_buffer_destroy(struct wl_listener *listener,
 218                                      struct wl_resource *resource,
 219                                      uint32_t time)
 220 {
 221         struct wlsc_output *output =
 222                 container_of(listener, struct wlsc_output,
 223                              scanout_buffer_destroy_listener);
 224         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 225
 226         if (output->scanout_buffer == buffer)
 227                 output->scanout_buffer = NULL;
 228 }
 229
 230 WL_EXPORT struct wlsc_surface *
 231 wlsc_surface_create(struct wlsc_compositor *compositor,
 232                     int32_t x, int32_t y, int32_t width, int32_t height)
 233 {
 234         struct wlsc_surface *surface;
 235
 236         surface = malloc(sizeof *surface);
 237         if (surface == NULL)
 238                 return NULL;
 239
 240         wl_list_init(&surface->link);
 241         wl_list_init(&surface->buffer_link);
 242         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 243
 244         glGenTextures(1, &surface->texture);
 245         glBindTexture(GL_TEXTURE_2D, surface->texture);
 246         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 247         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 248
 249         surface->surface.resource.client = NULL;
 250
 251         surface->compositor = compositor;
 252         surface->visual = WLSC_NONE_VISUAL;
 253         surface->image = EGL_NO_IMAGE_KHR;
 254         surface->saved_texture = 0;
 255         surface->x = x;
 256         surface->y = y;
 257         surface->width = width;
 258         surface->height = height;
 259
 260         surface->fullscreen_output = NULL;
 261         surface->buffer = NULL;
 262         surface->output = NULL;
 263
 264         pixman_region32_init(&surface->damage);
 265         pixman_region32_init(&surface->opaque);
 266
 267         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 268         wl_list_init(&surface->buffer_destroy_listener.link);
 269
 270         surface->transform = NULL;
 271
 272         return surface;
 273 }
 274
 275 WL_EXPORT void
 276 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 277                               int32_t x, int32_t y,
 278                               int32_t width, int32_t height)
 279 {
 280         struct wlsc_compositor *compositor = surface->compositor;
 281
 282         pixman_region32_union_rect(&surface->damage,
 283                                    &surface->damage,
 284                                    surface->x + x, surface->y + y,
 285                                    width, height);
 286         wlsc_compositor_schedule_repaint(compositor);
 287 }
 288
 289 WL_EXPORT void
 290 wlsc_surface_damage(struct wlsc_surface *surface)
 291 {
 292         wlsc_surface_damage_rectangle(surface, 0, 0,
 293                                       surface->width, surface->height);
 294 }
 295
 296 WL_EXPORT void
 297 wlsc_surface_damage_below(struct wlsc_surface *surface)
 298 {
 299         struct wlsc_surface *below;
 300
 301         if (surface->link.next == &surface->compositor->surface_list)
 302                 return;
 303
 304         below = container_of(surface->link.next, struct wlsc_surface, link);
 305
 306         pixman_region32_union_rect(&below->damage,
 307                                    &below->damage,
 308                                    surface->x, surface->y,
 309                                    surface->width, surface->height);
 310         wlsc_compositor_schedule_repaint(surface->compositor);
 311 }
 312
 313 WL_EXPORT void
 314 wlsc_surface_configure(struct wlsc_surface *surface,
 315                        int x, int y, int width, int height)
 316 {
 317         wlsc_surface_damage_below(surface);
 318
 319         surface->x = x;
 320         surface->y = y;
 321         surface->width = width;
 322         surface->height = height;
 323
 324         wlsc_surface_assign_output(surface);
 325         wlsc_surface_damage(surface);
 326
 327         pixman_region32_fini(&surface->opaque);
 328         if (surface->visual == WLSC_RGB_VISUAL)
 329                 pixman_region32_init_rect(&surface->opaque,
 330                                           surface->x, surface->y,
 331                                           surface->width, surface->height);
 332         else
 333                 pixman_region32_init(&surface->opaque);
 334 }
 335
 336 WL_EXPORT uint32_t
 337 wlsc_compositor_get_time(void)
 338 {
 339         struct timeval tv;
 340
 341         gettimeofday(&tv, NULL);
 342
 343         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 344 }
 345
 346 static void
 347 wlsc_compositor_repick(struct wlsc_compositor *compositor)
 348 {
 349         struct wlsc_input_device *device;
 350         struct wlsc_surface *surface;
 351         int32_t sx, sy;
 352         uint32_t time;
 353
 354         time = wlsc_compositor_get_time();
 355         wl_list_for_each(device, &compositor->input_device_list, link) {
 356                 if (device->input_device.grab)
 357                         continue;
 358                 surface = pick_surface(&device->input_device, &sx, &sy);
 359                 wl_input_device_set_pointer_focus(&device->input_device,
 360                                                   &surface->surface,
 361                                                   time,
 362                                                   device->input_device.x,
 363                                                   device->input_device.y,
 364                                                   sx, sy);
 365         }
 366 }
 367
 368 static void
 369 destroy_surface(struct wl_resource *resource)
 370 {
 371         struct wlsc_surface *surface =
 372                 container_of(resource, struct wlsc_surface, surface.resource);
 373         struct wlsc_compositor *compositor = surface->compositor;
 374
 375         wlsc_surface_damage_below(surface);
 376
 377         wl_list_remove(&surface->link);
 378         wlsc_compositor_repick(compositor);
 379
 380         if (surface->saved_texture == 0)
 381                 glDeleteTextures(1, &surface->texture);
 382         else
 383                 glDeleteTextures(1, &surface->saved_texture);
 384
 385         if (surface->buffer)
 386                 wl_list_remove(&surface->buffer_destroy_listener.link);
 387
 388         if (surface->image != EGL_NO_IMAGE_KHR)
 389                 compositor->destroy_image(compositor->display,
 390                                           surface->image);
 391
 392         wl_list_remove(&surface->buffer_link);
 393
 394         free(surface);
 395 }
 396
 397 static void
 398 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 399 {
 400         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 401         struct wlsc_compositor *ec = es->compositor;
 402         struct wl_list *surfaces_attached_to;
 403
 404         if (es->saved_texture != 0)
 405                 es->texture = es->saved_texture;
 406
 407         glBindTexture(GL_TEXTURE_2D, es->texture);
 408
 409         if (wl_buffer_is_shm(buffer)) {
 410                 /* Unbind any EGLImage texture that may be bound, so we don't
 411                  * overwrite it.*/
 412                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 413                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 414                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 415                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 416                              es->pitch, buffer->height, 0,
 417                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 418                              wl_shm_buffer_get_data(buffer));
 419
 420                 switch (wl_shm_buffer_get_format(buffer)) {
 421                 case WL_SHM_FORMAT_ARGB32:
 422                         es->visual = WLSC_ARGB_VISUAL;
 423                         break;
 424                 case WL_SHM_FORMAT_PREMULTIPLIED_ARGB32:
 425                         es->visual = WLSC_PREMUL_ARGB_VISUAL;
 426                         break;
 427                 case WL_SHM_FORMAT_XRGB32:
 428                         es->visual = WLSC_RGB_VISUAL;
 429                         break;
 430                 }
 431
 432                 surfaces_attached_to = buffer->user_data;
 433
 434                 wl_list_remove(&es->buffer_link);
 435                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 436         } else {
 437                 if (es->image != EGL_NO_IMAGE_KHR)
 438                         ec->destroy_image(ec->display, es->image);
 439                 es->image = ec->create_image(ec->display, NULL,
 440                                              EGL_WAYLAND_BUFFER_WL,
 441                                              buffer, NULL);
 442
 443                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 444
 445                 /* FIXME: we need to get the visual from the wl_buffer */
 446                 es->visual = WLSC_PREMUL_ARGB_VISUAL;
 447                 es->pitch = es->width;
 448         }
 449 }
 450
 451 static void
 452 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 453 {
 454         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 455         struct wlsc_compositor *ec = es->compositor;
 456
 457         es->pitch = es->width;
 458         es->image = sprite->image;
 459         if (sprite->image != EGL_NO_IMAGE_KHR) {
 460                 glBindTexture(GL_TEXTURE_2D, es->texture);
 461                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 462         } else {
 463                 if (es->saved_texture == 0)
 464                         es->saved_texture = es->texture;
 465                 es->texture = sprite->texture;
 466         }
 467
 468         es->visual = sprite->visual;
 469
 470         if (es->buffer)
 471                 es->buffer = NULL;
 472 }
 473
 474 enum sprite_usage {
 475         SPRITE_USE_CURSOR = (1 << 0),
 476 };
 477
 478 static struct wlsc_sprite *
 479 create_sprite_from_png(struct wlsc_compositor *ec,
 480                        const char *filename, uint32_t usage)
 481 {
 482         uint32_t *pixels;
 483         struct wlsc_sprite *sprite;
 484         int32_t width, height;
 485         uint32_t stride;
 486
 487         pixels = wlsc_load_image(filename, &width, &height, &stride);
 488         if (pixels == NULL)
 489                 return NULL;
 490
 491         sprite = malloc(sizeof *sprite);
 492         if (sprite == NULL) {
 493                 free(pixels);
 494                 return NULL;
 495         }
 496
 497         sprite->visual = WLSC_PREMUL_ARGB_VISUAL;
 498         sprite->width = width;
 499         sprite->height = height;
 500         sprite->image = EGL_NO_IMAGE_KHR;
 501
 502         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 503                 sprite->image = ec->create_cursor_image(ec, width, height);
 504
 505         glGenTextures(1, &sprite->texture);
 506         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 507         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 508         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 509         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 510         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 511
 512         if (sprite->image != EGL_NO_IMAGE_KHR) {
 513                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 514                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 515                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 516         } else {
 517                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 518                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 519         }
 520
 521         free(pixels);
 522
 523         return sprite;
 524 }
 525
 526 static const struct {
 527         const char *filename;
 528         int hotspot_x, hotspot_y;
 529 } pointer_images[] = {
 530         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 531         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 532         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 533         { DATADIR "/wayland/grabbing.png",              20, 17 },
 534         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 535         { DATADIR "/wayland/left_side.png",             10, 20 },
 536         { DATADIR "/wayland/right_side.png",            30, 19 },
 537         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 538         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 539         { DATADIR "/wayland/top_side.png",              18,  8 },
 540         { DATADIR "/wayland/xterm.png",                 15, 15 }
 541 };
 542
 543 static void
 544 create_pointer_images(struct wlsc_compositor *ec)
 545 {
 546         int i, count;
 547
 548         count = ARRAY_LENGTH(pointer_images);
 549         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 550         for (i = 0; i < count; i++) {
 551                 ec->pointer_sprites[i] =
 552                         create_sprite_from_png(ec,
 553                                                pointer_images[i].filename,
 554                                                SPRITE_USE_CURSOR);
 555         }
 556 }
 557
 558 static int
 559 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 560 {
 561         struct wlsc_compositor *ec = es->compositor;
 562         GLfloat *v, inv_width, inv_height;
 563         pixman_box32_t *rectangles;
 564         unsigned int *p;
 565         int i, n;
 566
 567         rectangles = pixman_region32_rectangles(region, &n);
 568         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 569         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 570         inv_width = 1.0 / es->pitch;
 571         inv_height = 1.0 / es->height;
 572
 573         for (i = 0; i < n; i++, v += 16, p += 6) {
 574                 v[ 0] = rectangles[i].x1;
 575                 v[ 1] = rectangles[i].y1;
 576                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 577                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 578
 579                 v[ 4] = rectangles[i].x1;
 580                 v[ 5] = rectangles[i].y2;
 581                 v[ 6] = v[ 2];
 582                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 583
 584                 v[ 8] = rectangles[i].x2;
 585                 v[ 9] = rectangles[i].y1;
 586                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 587                 v[11] = v[ 3];
 588
 589                 v[12] = rectangles[i].x2;
 590                 v[13] = rectangles[i].y2;
 591                 v[14] = v[10];
 592                 v[15] = v[ 7];
 593
 594                 p[0] = i * 4 + 0;
 595                 p[1] = i * 4 + 1;
 596                 p[2] = i * 4 + 2;
 597                 p[3] = i * 4 + 2;
 598                 p[4] = i * 4 + 1;
 599                 p[5] = i * 4 + 3;
 600         }
 601
 602         return n;
 603 }
 604
 605 static void
 606 transform_vertex(struct wlsc_surface *surface,
 607                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 608 {
 609         struct wlsc_vector t;
 610
 611         t.f[0] = x;
 612         t.f[1] = y;
 613         t.f[2] = 0.0;
 614         t.f[3] = 1.0;
 615
 616         wlsc_matrix_transform(&surface->transform->matrix, &t);
 617
 618         r[ 0] = t.f[0];
 619         r[ 1] = t.f[1];
 620         r[ 2] = u;
 621         r[ 3] = v;
 622 }
 623
 624 static int
 625 texture_transformed_surface(struct wlsc_surface *es)
 626 {
 627         struct wlsc_compositor *ec = es->compositor;
 628         GLfloat *v;
 629         unsigned int *p;
 630
 631         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 632         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 633
 634         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 635         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 636         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 637         transform_vertex(es, es->x + es->width, es->y + es->height,
 638                          1.0, 1.0, &v[12]);
 639
 640         p[0] = 0;
 641         p[1] = 1;
 642         p[2] = 2;
 643         p[3] = 2;
 644         p[4] = 1;
 645         p[5] = 3;
 646
 647         return 1;
 648 }
 649
 650 static void
 651 wlsc_surface_draw(struct wlsc_surface *es,
 652                   struct wlsc_output *output, pixman_region32_t *clip)
 653 {
 654         struct wlsc_compositor *ec = es->compositor;
 655         GLfloat *v;
 656         pixman_region32_t repaint;
 657         GLint filter;
 658         int n;
 659
 660         pixman_region32_init_rect(&repaint,
 661                                   es->x, es->y, es->width, es->height);
 662         pixman_region32_intersect(&repaint, &repaint, clip);
 663         if (!pixman_region32_not_empty(&repaint))
 664                 return;
 665
 666         switch (es->visual) {
 667         case WLSC_ARGB_VISUAL:
 668                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 669                 glEnable(GL_BLEND);
 670                 break;
 671         case WLSC_PREMUL_ARGB_VISUAL:
 672                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 673                 glEnable(GL_BLEND);
 674                 break;
 675         case WLSC_RGB_VISUAL:
 676                 glDisable(GL_BLEND);
 677                 break;
 678         default:
 679                 fprintf(stderr, "bogus visual\n");
 680                 break;
 681         }
 682
 683         if (es->transform == NULL) {
 684                 filter = GL_NEAREST;
 685                 n = texture_region(es, &repaint);
 686         } else {
 687                 filter = GL_LINEAR;
 688                 n = texture_transformed_surface(es);
 689         }
 690
 691         glBindTexture(GL_TEXTURE_2D, es->texture);
 692         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 693         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 694
 695         v = ec->vertices.data;
 696         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 697         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 698         glEnableVertexAttribArray(0);
 699         glEnableVertexAttribArray(1);
 700         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 701
 702         ec->vertices.size = 0;
 703         ec->indices.size = 0;
 704         pixman_region32_fini(&repaint);
 705 }
 706
 707 static void
 708 wlsc_surface_raise(struct wlsc_surface *surface)
 709 {
 710         struct wlsc_compositor *compositor = surface->compositor;
 711
 712         wl_list_remove(&surface->link);
 713         wl_list_insert(&compositor->surface_list, &surface->link);
 714         wlsc_compositor_repick(compositor);
 715         wlsc_surface_damage(surface);
 716 }
 717
 718 WL_EXPORT void
 719 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 720 {
 721         struct wlsc_output *output;
 722
 723         wl_list_for_each(output, &compositor->output_list, link)
 724                 wlsc_output_damage(output);
 725 }
 726
 727 static inline void
 728 wlsc_buffer_post_release(struct wl_buffer *buffer)
 729 {
 730         if (buffer == NULL || --buffer->busy_count > 0)
 731                 return;
 732
 733         assert(buffer->resource.client != NULL);
 734         wl_resource_post_event(&buffer->resource, WL_BUFFER_RELEASE);
 735 }
 736
 737 WL_EXPORT void
 738 wlsc_output_damage(struct wlsc_output *output)
 739 {
 740         struct wlsc_compositor *compositor = output->compositor;
 741
 742         pixman_region32_union(&compositor->damage,
 743                               &compositor->damage, &output->region);
 744         wlsc_compositor_schedule_repaint(compositor);
 745 }
 746
 747 static void
 748 fade_frame(struct wlsc_animation *animation,
 749            struct wlsc_output *output, uint32_t msecs)
 750 {
 751         struct wlsc_compositor *compositor =
 752                 container_of(animation,
 753                              struct wlsc_compositor, fade.animation);
 754
 755         wlsc_spring_update(&compositor->fade.spring, msecs);
 756         if (wlsc_spring_done(&compositor->fade.spring)) {
 757                 if (compositor->fade.spring.current > 0.999) {
 758                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 759                         compositor->shell->lock(compositor->shell);
 760                 }
 761                 compositor->fade.spring.current =
 762                         compositor->fade.spring.target;
 763                 wl_list_remove(&animation->link);
 764                 wl_list_init(&animation->link);
 765         }
 766
 767         wlsc_output_damage(output);
 768 }
 769
 770 static void
 771 fade_output(struct wlsc_output *output,
 772             GLfloat tint, pixman_region32_t *region)
 773 {
 774         struct wlsc_compositor *compositor = output->compositor;
 775         struct wlsc_surface surface;
 776         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 777
 778         surface.compositor = compositor;
 779         surface.x = output->x;
 780         surface.y = output->y;
 781         surface.pitch = output->current->width;
 782         surface.width = output->current->width;
 783         surface.height = output->current->height;
 784         surface.texture = GL_NONE;
 785         surface.transform = NULL;
 786
 787         if (tint <= 1.0)
 788                 surface.visual = WLSC_PREMUL_ARGB_VISUAL;
 789         else
 790                 surface.visual = WLSC_RGB_VISUAL;
 791
 792         glUseProgram(compositor->solid_shader.program);
 793         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 794                            1, GL_FALSE, output->matrix.d);
 795         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 796         wlsc_surface_draw(&surface, output, region);
 797 }
 798
 799 static void
 800 wlsc_output_set_cursor(struct wlsc_output *output,
 801                        struct wl_input_device *dev, int force_sw)
 802 {
 803         struct wlsc_compositor *ec = output->compositor;
 804         struct wlsc_input_device *device = (struct wlsc_input_device *) dev;
 805         pixman_region32_t cursor_region;
 806         int use_hardware_cursor = 1, prior_was_hardware;
 807
 808         pixman_region32_init_rect(&cursor_region,
 809                                   device->sprite->x, device->sprite->y,
 810                                   device->sprite->width,
 811                                   device->sprite->height);
 812
 813         pixman_region32_intersect(&cursor_region, &cursor_region, &output->region);
 814
 815         if (!pixman_region32_not_empty(&cursor_region)) {
 816                 output->set_hardware_cursor(output, NULL);
 817                 goto out;
 818         }
 819
 820         prior_was_hardware = wl_list_empty(&device->sprite->link);
 821         if (force_sw || output->set_hardware_cursor(output, device) < 0) {
 822                 if (prior_was_hardware) {
 823                         wlsc_surface_damage(device->sprite);
 824                         output->set_hardware_cursor(output, NULL);
 825                 }
 826                 use_hardware_cursor = 0;
 827         } else if (!prior_was_hardware) {
 828                 wlsc_surface_damage_below(device->sprite);
 829         }
 830
 831         /* Remove always to be on top. */
 832         wl_list_remove(&device->sprite->link);
 833         if (!use_hardware_cursor && ec->focus)
 834                 wl_list_insert(&ec->surface_list, &device->sprite->link);
 835         else
 836                 wl_list_init(&device->sprite->link);
 837
 838 out:
 839         pixman_region32_fini(&cursor_region);
 840 }
 841
 842 static void
 843 wlsc_output_repaint(struct wlsc_output *output)
 844 {
 845         struct wlsc_compositor *ec = output->compositor;
 846         struct wlsc_surface *es;
 847         pixman_region32_t opaque, new_damage, total_damage, repaint;
 848
 849         output->prepare_render(output);
 850
 851         glViewport(0, 0, output->current->width, output->current->height);
 852
 853         glUseProgram(ec->texture_shader.program);
 854         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 855                            1, GL_FALSE, output->matrix.d);
 856         glUniform1i(ec->texture_shader.tex_uniform, 0);
 857
 858         wlsc_output_set_cursor(output, ec->input_device,
 859                                ec->fade.spring.current >= 0.001);
 860
 861         pixman_region32_init(&new_damage);
 862         pixman_region32_copy(&new_damage, &ec->damage);
 863         pixman_region32_init(&opaque);
 864
 865         wl_list_for_each(es, &ec->surface_list, link) {
 866                 pixman_region32_subtract(&es->damage, &es->damage, &opaque);
 867                 pixman_region32_union(&new_damage, &new_damage, &es->damage);
 868                 pixman_region32_union(&opaque, &opaque, &es->opaque);
 869         }
 870
 871         pixman_region32_subtract(&ec->damage, &ec->damage, &output->region);
 872
 873         pixman_region32_init(&total_damage);
 874         pixman_region32_union(&total_damage, &new_damage,
 875                               &output->previous_damage);
 876         pixman_region32_intersect(&output->previous_damage,
 877                                   &new_damage, &output->region);
 878
 879         pixman_region32_fini(&opaque);
 880         pixman_region32_fini(&new_damage);
 881
 882         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 883
 884         if (es->visual == WLSC_RGB_VISUAL &&
 885             output->prepare_scanout_surface(output, es) == 0) {
 886                 /* We're drawing nothing now,
 887                  * draw the damaged regions later. */
 888                 pixman_region32_union(&ec->damage, &ec->damage, &total_damage);
 889
 890                 output->scanout_buffer = es->buffer;
 891                 output->scanout_buffer->busy_count++;
 892
 893                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 894                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 895                                &output->scanout_buffer_destroy_listener.link);
 896
 897                 return;
 898         }
 899
 900         if (es->fullscreen_output == output) {
 901                 if (es->width < output->current->width ||
 902                     es->height < output->current->height)
 903                         glClear(GL_COLOR_BUFFER_BIT);
 904                 wlsc_surface_draw(es, output, &total_damage);
 905         } else {
 906                 wl_list_for_each(es, &ec->surface_list, link) {
 907                         pixman_region32_copy(&es->damage, &total_damage);
 908                         pixman_region32_subtract(&total_damage, &total_damage, &es->opaque);
 909                 }
 910
 911                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 912                         pixman_region32_init(&repaint);
 913                         pixman_region32_intersect(&repaint, &output->region,
 914                                                   &es->damage);
 915                         wlsc_surface_draw(es, output, &repaint);
 916                         pixman_region32_subtract(&es->damage,
 917                                                  &es->damage, &output->region);
 918                 }
 919         }
 920
 921         if (ec->fade.spring.current > 0.001)
 922                 fade_output(output, ec->fade.spring.current, &total_damage);
 923 }
 924
 925 struct wlsc_frame_callback {
 926         struct wl_resource resource;
 927         struct wl_list link;
 928 };
 929
 930 static void
 931 repaint(void *data, int msecs)
 932 {
 933         struct wlsc_output *output = data;
 934         struct wlsc_compositor *compositor = output->compositor;
 935         struct wlsc_animation *animation, *next;
 936         struct wlsc_frame_callback *cb, *cnext;
 937
 938         wlsc_output_repaint(output);
 939         output->repaint_needed = 0;
 940         output->repaint_scheduled = 1;
 941         output->present(output);
 942
 943         wl_list_for_each_safe(cb, cnext, &output->frame_callback_list, link) {
 944                 wl_resource_post_event(&cb->resource, WL_CALLBACK_DONE, msecs);
 945                 wl_resource_destroy(&cb->resource, 0);
 946         }
 947
 948         wl_list_for_each_safe(animation, next,
 949                               &compositor->animation_list, link)
 950                 animation->frame(animation, output, msecs);
 951 }
 952
 953 static void
 954 idle_repaint(void *data)
 955 {
 956         repaint(data, wlsc_compositor_get_time());
 957 }
 958
 959 WL_EXPORT void
 960 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 961 {
 962         wlsc_buffer_post_release(output->scanout_buffer);
 963         output->scanout_buffer = NULL;
 964         output->repaint_scheduled = 0;
 965
 966         if (output->repaint_needed)
 967                 repaint(output, msecs);
 968 }
 969
 970 WL_EXPORT void
 971 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 972 {
 973         struct wlsc_output *output;
 974         struct wl_event_loop *loop;
 975
 976         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 977                 return;
 978
 979         loop = wl_display_get_event_loop(compositor->wl_display);
 980         wl_list_for_each(output, &compositor->output_list, link) {
 981                 output->repaint_needed = 1;
 982                 if (output->repaint_scheduled)
 983                         continue;
 984
 985                 wl_event_loop_add_idle(loop, idle_repaint, output);
 986                 output->repaint_scheduled = 1;
 987         }
 988 }
 989
 990 WL_EXPORT void
 991 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 992 {
 993         int done;
 994
 995         done = wlsc_spring_done(&compositor->fade.spring);
 996         compositor->fade.spring.target = tint;
 997         if (wlsc_spring_done(&compositor->fade.spring))
 998                 return;
 999
1000         if (done)
1001                 compositor->fade.spring.timestamp =
1002                         wlsc_compositor_get_time();
1003
1004         wlsc_compositor_damage_all(compositor);
1005         if (wl_list_empty(&compositor->fade.animation.link))
1006                 wl_list_insert(compositor->animation_list.prev,
1007                                &compositor->fade.animation.link);
1008 }
1009
1010 static void
1011 surface_destroy(struct wl_client *client, struct wl_resource *resource)
1012 {
1013         wl_resource_destroy(resource, wlsc_compositor_get_time());
1014 }
1015
1016 WL_EXPORT void
1017 wlsc_surface_assign_output(struct wlsc_surface *es)
1018 {
1019         struct wlsc_compositor *ec = es->compositor;
1020         struct wlsc_output *output;
1021         pixman_region32_t region;
1022         uint32_t max, area;
1023         pixman_box32_t *e;
1024
1025         max = 0;
1026         wl_list_for_each(output, &ec->output_list, link) {
1027                 pixman_region32_init_rect(&region,
1028                                           es->x, es->y, es->width, es->height);
1029                 pixman_region32_intersect(&region, &region, &output->region);
1030
1031                 e = pixman_region32_extents(&region);
1032                 area = (e->x2 - e->x1) * (e->y2 - e->y1);
1033
1034                 if (area >= max) {
1035                         es->output = output;
1036                         max = area;
1037                 }
1038         }
1039 }
1040
1041 static void
1042 surface_attach(struct wl_client *client,
1043                struct wl_resource *resource,
1044                struct wl_resource *buffer_resource, int32_t x, int32_t y)
1045 {
1046         struct wlsc_surface *es = resource->data;
1047         struct wl_buffer *buffer = buffer_resource->data;
1048         int repick = 0;
1049
1050         buffer->busy_count++;
1051         wlsc_buffer_post_release(es->buffer);
1052
1053         es->buffer = buffer;
1054         wl_list_remove(&es->buffer_destroy_listener.link);
1055         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
1056                        &es->buffer_destroy_listener.link);
1057
1058         if (es->visual == WLSC_NONE_VISUAL) {
1059                 wl_list_insert(&es->compositor->surface_list, &es->link);
1060                 repick = 1;
1061         }
1062
1063         if (x != 0 || y != 0 ||
1064             es->width != buffer->width || es->height != buffer->height) {
1065                 wlsc_surface_configure(es, es->x + x, es->y + y,
1066                                        buffer->width, buffer->height);
1067                 repick = 1;
1068         }
1069
1070         wlsc_buffer_attach(buffer, &es->surface);
1071
1072         es->compositor->shell->attach(es->compositor->shell, es);
1073
1074         if (repick)
1075                 wlsc_compositor_repick(es->compositor);
1076 }
1077
1078 static void
1079 surface_damage(struct wl_client *client,
1080                struct wl_resource *resource,
1081                int32_t x, int32_t y, int32_t width, int32_t height)
1082 {
1083         struct wlsc_surface *es = resource->data;
1084
1085         wlsc_surface_damage_rectangle(es, x, y, width, height);
1086 }
1087
1088 static void
1089 destroy_frame_callback(struct wl_resource *resource)
1090 {
1091         struct wlsc_frame_callback *cb = resource->data;
1092
1093         wl_list_remove(&cb->link);
1094         free(resource);
1095 }
1096
1097 static void
1098 surface_frame(struct wl_client *client,
1099               struct wl_resource *resource, uint32_t callback)
1100 {
1101         struct wlsc_frame_callback *cb;
1102         struct wlsc_surface *es = resource->data;
1103
1104         cb = malloc(sizeof *cb);
1105         if (cb == NULL) {
1106                 wl_resource_post_no_memory(resource);
1107                 return;
1108         }
1109
1110         cb->resource.object.interface = &wl_callback_interface;
1111         cb->resource.object.id = callback;
1112         cb->resource.destroy = destroy_frame_callback;
1113         cb->resource.client = client;
1114         cb->resource.data = cb;
1115
1116         wl_client_add_resource(client, &cb->resource);
1117
1118         if (es->output) {
1119                 wl_list_insert(es->output->frame_callback_list.prev,
1120                                &cb->link);
1121         } else {
1122                 wl_list_init(&cb->link);
1123                 wl_resource_destroy(&cb->resource, 0);
1124         }
1125 }
1126
1127 const static struct wl_surface_interface surface_interface = {
1128         surface_destroy,
1129         surface_attach,
1130         surface_damage,
1131         surface_frame
1132 };
1133
1134 static void
1135 wlsc_input_device_attach(struct wlsc_input_device *device,
1136                          int x, int y, int width, int height)
1137 {
1138         wlsc_surface_damage_below(device->sprite);
1139
1140         device->hotspot_x = x;
1141         device->hotspot_y = y;
1142
1143         device->sprite->x = device->input_device.x - device->hotspot_x;
1144         device->sprite->y = device->input_device.y - device->hotspot_y;
1145         device->sprite->width = width;
1146         device->sprite->height = height;
1147
1148         wlsc_surface_damage(device->sprite);
1149 }
1150
1151 static void
1152 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
1153                                 struct wl_buffer *buffer, int x, int y)
1154 {
1155         wlsc_buffer_attach(buffer, &device->sprite->surface);
1156         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
1157 }
1158
1159 static void
1160 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
1161                                 struct wlsc_sprite *sprite, int x, int y)
1162 {
1163         if (!sprite)
1164                 return;
1165
1166         wlsc_sprite_attach(sprite, &device->sprite->surface);
1167         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
1168 }
1169
1170 WL_EXPORT void
1171 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
1172                                     enum wlsc_pointer_type type)
1173 {
1174         struct wlsc_compositor *compositor =
1175                 (struct wlsc_compositor *) device->input_device.compositor;
1176
1177         wlsc_input_device_attach_sprite(device,
1178                                         compositor->pointer_sprites[type],
1179                                         pointer_images[type].hotspot_x,
1180                                         pointer_images[type].hotspot_y);
1181 }
1182
1183 static void
1184 compositor_create_surface(struct wl_client *client,
1185                           struct wl_resource *resource, uint32_t id)
1186 {
1187         struct wlsc_compositor *ec = resource->data;
1188         struct wlsc_surface *surface;
1189
1190         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1191         if (surface == NULL) {
1192                 wl_resource_post_no_memory(resource);
1193                 return;
1194         }
1195
1196         surface->surface.resource.destroy = destroy_surface;
1197
1198         surface->surface.resource.object.id = id;
1199         surface->surface.resource.object.interface = &wl_surface_interface;
1200         surface->surface.resource.object.implementation =
1201                 (void (**)(void)) &surface_interface;
1202         surface->surface.resource.data = surface;
1203
1204         wl_client_add_resource(client, &surface->surface.resource);
1205 }
1206
1207 const static struct wl_compositor_interface compositor_interface = {
1208         compositor_create_surface,
1209 };
1210
1211 static void
1212 wlsc_surface_transform(struct wlsc_surface *surface,
1213                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1214 {
1215         *sx = x - surface->x;
1216         *sy = y - surface->y;
1217 }
1218
1219 WL_EXPORT struct wlsc_surface *
1220 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1221 {
1222         struct wlsc_compositor *ec =
1223                 (struct wlsc_compositor *) device->compositor;
1224         struct wlsc_surface *es;
1225
1226         wl_list_for_each(es, &ec->surface_list, link) {
1227                 if (es->surface.resource.client == NULL)
1228                         continue;
1229                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1230                 if (0 <= *sx && *sx < es->width &&
1231                     0 <= *sy && *sy < es->height)
1232                         return es;
1233         }
1234
1235         return NULL;
1236 }
1237
1238
1239 static void
1240 implicit_grab_motion(struct wl_grab *grab,
1241                      uint32_t time, int32_t x, int32_t y)
1242 {
1243         struct wlsc_input_device *device =
1244                 (struct wlsc_input_device *) grab->input_device;
1245         struct wlsc_surface *es =
1246                 (struct wlsc_surface *) device->input_device.pointer_focus;
1247         int32_t sx, sy;
1248         struct wl_resource *resource;
1249
1250         resource = grab->input_device->pointer_focus_resource;
1251         if (resource) {
1252                 wlsc_surface_transform(es, x, y, &sx, &sy);
1253                 wl_resource_post_event(resource, WL_INPUT_DEVICE_MOTION,
1254                                        time, x, y, sx, sy);
1255         }
1256 }
1257
1258 static void
1259 implicit_grab_button(struct wl_grab *grab,
1260                      uint32_t time, int32_t button, int32_t state)
1261 {
1262         struct wl_resource *resource;
1263
1264         resource = grab->input_device->pointer_focus_resource;
1265         if (resource)
1266                 wl_resource_post_event(resource, WL_INPUT_DEVICE_BUTTON,
1267                                        time, button, state);
1268 }
1269
1270 static void
1271 implicit_grab_end(struct wl_grab *grab, uint32_t time)
1272 {
1273 }
1274
1275 static const struct wl_grab_interface implicit_grab_interface = {
1276         implicit_grab_motion,
1277         implicit_grab_button,
1278         implicit_grab_end
1279 };
1280
1281 WL_EXPORT void
1282 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1283 {
1284         if (compositor->idle_inhibit)
1285                 return;
1286
1287         wlsc_compositor_fade(compositor, 0.0);
1288         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1289
1290         wl_event_source_timer_update(compositor->idle_source,
1291                                      option_idle_time * 1000);
1292 }
1293
1294 static void
1295 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1296 {
1297         wlsc_compositor_wake(compositor);
1298         compositor->idle_inhibit++;
1299 }
1300
1301 static void
1302 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1303 {
1304         compositor->idle_inhibit--;
1305         wlsc_compositor_wake(compositor);
1306 }
1307
1308 static int
1309 idle_handler(void *data)
1310 {
1311         struct wlsc_compositor *compositor = data;
1312
1313         if (compositor->idle_inhibit)
1314                 return 1;
1315
1316         wlsc_compositor_fade(compositor, 1.0);
1317
1318         return 1;
1319 }
1320
1321 WL_EXPORT void
1322 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1323 {
1324         struct wlsc_surface *es;
1325         struct wlsc_compositor *ec =
1326                 (struct wlsc_compositor *) device->compositor;
1327         struct wlsc_output *output;
1328         const struct wl_grab_interface *interface;
1329         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1330         int32_t sx, sy;
1331         int x_valid = 0, y_valid = 0;
1332         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1333
1334         wlsc_compositor_wake(ec);
1335
1336         wl_list_for_each(output, &ec->output_list, link) {
1337                 if (output->x <= x && x <= output->x + output->current->width)
1338                         x_valid = 1;
1339
1340                 if (output->y <= y && y <= output->y + output->current->height)
1341                         y_valid = 1;
1342
1343                 /* FIXME: calculate this only on output addition/deletion */
1344                 if (output->x < min_x)
1345                         min_x = output->x;
1346                 if (output->y < min_y)
1347                         min_y = output->y;
1348
1349                 if (output->x + output->current->width > max_x)
1350                         max_x = output->x + output->current->width;
1351                 if (output->y + output->current->height > max_y)
1352                         max_y = output->y + output->current->height;
1353         }
1354
1355         if (!x_valid) {
1356                 if (x < min_x)
1357                         x = min_x;
1358                 else if (x >= max_x)
1359                         x = max_x;
1360         }
1361         if (!y_valid) {
1362                 if (y < min_y)
1363                         y = min_y;
1364                 else  if (y >= max_y)
1365                         y = max_y;
1366         }
1367
1368         device->x = x;
1369         device->y = y;
1370
1371         if (device->grab) {
1372                 interface = device->grab->interface;
1373                 interface->motion(device->grab, time, x, y);
1374         } else {
1375                 es = pick_surface(device, &sx, &sy);
1376                 wl_input_device_set_pointer_focus(device,
1377                                                   &es->surface,
1378                                                   time, x, y, sx, sy);
1379                 if (device->pointer_focus_resource)
1380                         wl_resource_post_event(device->pointer_focus_resource,
1381                                                WL_INPUT_DEVICE_MOTION,
1382                                                time, x, y, sx, sy);
1383         }
1384
1385         wlsc_surface_damage_below(wd->sprite);
1386
1387         wd->sprite->x = device->x - wd->hotspot_x;
1388         wd->sprite->y = device->y - wd->hotspot_y;
1389
1390         wlsc_surface_damage(wd->sprite);
1391 }
1392
1393 WL_EXPORT void
1394 wlsc_surface_activate(struct wlsc_surface *surface,
1395                       struct wlsc_input_device *device, uint32_t time)
1396 {
1397         struct wlsc_shell *shell = surface->compositor->shell;
1398
1399         wlsc_surface_raise(surface);
1400         if (device->selection)
1401                 shell->set_selection_focus(shell,
1402                                            device->selection,
1403                                            &surface->surface, time);
1404
1405         wl_input_device_set_keyboard_focus(&device->input_device,
1406                                            &surface->surface,
1407                                            time);
1408 }
1409
1410 struct wlsc_binding {
1411         uint32_t key;
1412         uint32_t button;
1413         uint32_t modifier;
1414         wlsc_binding_handler_t handler;
1415         void *data;
1416         struct wl_list link;
1417 };
1418
1419 WL_EXPORT void
1420 notify_button(struct wl_input_device *device,
1421               uint32_t time, int32_t button, int32_t state)
1422 {
1423         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1424         struct wlsc_compositor *compositor =
1425                 (struct wlsc_compositor *) device->compositor;
1426         struct wlsc_binding *b;
1427         struct wlsc_surface *surface =
1428                 (struct wlsc_surface *) device->pointer_focus;
1429         int32_t sx, sy;
1430
1431         if (state)
1432                 wlsc_compositor_idle_inhibit(compositor);
1433         else
1434                 wlsc_compositor_idle_release(compositor);
1435
1436         if (state && surface && device->grab == NULL) {
1437                 compositor->shell->activate(compositor->shell,
1438                                             surface, wd, time);
1439                 wl_input_device_start_grab(device,
1440                                            &device->implicit_grab,
1441                                            button, time);
1442         }
1443
1444         wl_list_for_each(b, &compositor->binding_list, link) {
1445                 if (b->button == button &&
1446                     b->modifier == wd->modifier_state && state) {
1447                         b->handler(&wd->input_device,
1448                                    time, 0, button, state, b->data);
1449                         break;
1450                 }
1451         }
1452
1453         if (device->grab)
1454                 device->grab->interface->button(device->grab, time,
1455                                                 button, state);
1456
1457         if (!state && device->grab && device->grab_button == button) {
1458                 wl_input_device_end_grab(device, time);
1459                 surface = pick_surface(device, &sx, &sy);
1460                 wl_input_device_set_pointer_focus(device, &surface->surface,
1461                                                   time, device->x, device->y,
1462                                                   sx, sy);
1463         }
1464 }
1465
1466 static void
1467 terminate_binding(struct wl_input_device *device, uint32_t time,
1468                   uint32_t key, uint32_t button, uint32_t state, void *data)
1469 {
1470         struct wlsc_compositor *compositor = data;
1471
1472         if (state)
1473                 wl_display_terminate(compositor->wl_display);
1474 }
1475
1476 WL_EXPORT struct wlsc_binding *
1477 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1478                             uint32_t key, uint32_t button, uint32_t modifier,
1479                             wlsc_binding_handler_t handler, void *data)
1480 {
1481         struct wlsc_binding *binding;
1482
1483         binding = malloc(sizeof *binding);
1484         if (binding == NULL)
1485                 return NULL;
1486
1487         binding->key = key;
1488         binding->button = button;
1489         binding->modifier = modifier;
1490         binding->handler = handler;
1491         binding->data = data;
1492         wl_list_insert(compositor->binding_list.prev, &binding->link);
1493
1494         return binding;
1495 }
1496
1497 WL_EXPORT void
1498 wlsc_binding_destroy(struct wlsc_binding *binding)
1499 {
1500         wl_list_remove(&binding->link);
1501         free(binding);
1502 }
1503
1504 static void
1505 update_modifier_state(struct wlsc_input_device *device,
1506                       uint32_t key, uint32_t state)
1507 {
1508         uint32_t modifier;
1509
1510         switch (key) {
1511         case KEY_LEFTCTRL:
1512         case KEY_RIGHTCTRL:
1513                 modifier = MODIFIER_CTRL;
1514                 break;
1515
1516         case KEY_LEFTALT:
1517         case KEY_RIGHTALT:
1518                 modifier = MODIFIER_ALT;
1519                 break;
1520
1521         case KEY_LEFTMETA:
1522         case KEY_RIGHTMETA:
1523                 modifier = MODIFIER_SUPER;
1524                 break;
1525
1526         default:
1527                 modifier = 0;
1528                 break;
1529         }
1530
1531         if (state)
1532                 device->modifier_state |= modifier;
1533         else
1534                 device->modifier_state &= ~modifier;
1535 }
1536
1537 WL_EXPORT void
1538 notify_key(struct wl_input_device *device,
1539            uint32_t time, uint32_t key, uint32_t state)
1540 {
1541         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1542         struct wlsc_compositor *compositor =
1543                 (struct wlsc_compositor *) device->compositor;
1544         uint32_t *k, *end;
1545         struct wlsc_binding *b;
1546
1547         if (state)
1548                 wlsc_compositor_idle_inhibit(compositor);
1549         else
1550                 wlsc_compositor_idle_release(compositor);
1551
1552         wl_list_for_each(b, &compositor->binding_list, link) {
1553                 if (b->key == key &&
1554                     b->modifier == wd->modifier_state) {
1555                         b->handler(&wd->input_device,
1556                                    time, key, 0, state, b->data);
1557                         break;
1558                 }
1559         }
1560
1561         update_modifier_state(wd, key, state);
1562         end = device->keys.data + device->keys.size;
1563         for (k = device->keys.data; k < end; k++) {
1564                 if (*k == key)
1565                         *k = *--end;
1566         }
1567         device->keys.size = (void *) end - device->keys.data;
1568         if (state) {
1569                 k = wl_array_add(&device->keys, sizeof *k);
1570                 *k = key;
1571         }
1572
1573         if (device->keyboard_focus_resource)
1574                 wl_resource_post_event(device->keyboard_focus_resource,
1575                                        WL_INPUT_DEVICE_KEY, time, key, state);
1576 }
1577
1578 WL_EXPORT void
1579 notify_pointer_focus(struct wl_input_device *device,
1580                      uint32_t time, struct wlsc_output *output,
1581                      int32_t x, int32_t y)
1582 {
1583         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1584         struct wlsc_compositor *compositor =
1585                 (struct wlsc_compositor *) device->compositor;
1586         struct wlsc_surface *es;
1587         int32_t sx, sy;
1588
1589         if (output) {
1590                 device->x = x;
1591                 device->y = y;
1592                 es = pick_surface(device, &sx, &sy);
1593                 wl_input_device_set_pointer_focus(device,
1594                                                   &es->surface,
1595                                                   time, x, y, sx, sy);
1596
1597                 compositor->focus = 1;
1598
1599                 wd->sprite->x = device->x - wd->hotspot_x;
1600                 wd->sprite->y = device->y - wd->hotspot_y;
1601         } else {
1602                 wl_input_device_set_pointer_focus(device, NULL,
1603                                                   time, 0, 0, 0, 0);
1604                 compositor->focus = 0;
1605         }
1606
1607         wlsc_surface_damage(wd->sprite);
1608 }
1609
1610 WL_EXPORT void
1611 notify_keyboard_focus(struct wl_input_device *device,
1612                       uint32_t time, struct wlsc_output *output,
1613                       struct wl_array *keys)
1614 {
1615         struct wlsc_input_device *wd =
1616                 (struct wlsc_input_device *) device;
1617         struct wlsc_compositor *compositor =
1618                 (struct wlsc_compositor *) device->compositor;
1619         struct wlsc_surface *es;
1620         uint32_t *k, *end;
1621
1622         if (!wl_list_empty(&compositor->surface_list))
1623                 es = container_of(compositor->surface_list.next,
1624                                   struct wlsc_surface, link);
1625         else
1626                 es = NULL;
1627
1628         if (output) {
1629                 wl_array_copy(&wd->input_device.keys, keys);
1630                 wd->modifier_state = 0;
1631                 end = device->keys.data + device->keys.size;
1632                 for (k = device->keys.data; k < end; k++) {
1633                         wlsc_compositor_idle_inhibit(compositor);
1634                         update_modifier_state(wd, *k, 1);
1635                 }
1636
1637                 if (es && es->surface.resource.client)
1638                         wl_input_device_set_keyboard_focus(&wd->input_device,
1639                                                            &es->surface, time);
1640         } else {
1641                 end = device->keys.data + device->keys.size;
1642                 for (k = device->keys.data; k < end; k++)
1643                         wlsc_compositor_idle_release(compositor);
1644
1645                 wd->modifier_state = 0;
1646                 wl_input_device_set_keyboard_focus(&wd->input_device,
1647                                                    NULL, time);
1648         }
1649 }
1650
1651
1652 static void
1653 input_device_attach(struct wl_client *client,
1654                     struct wl_resource *resource,
1655                     uint32_t time,
1656                     struct wl_resource *buffer_resource, int32_t x, int32_t y)
1657 {
1658         struct wlsc_input_device *device = resource->data;
1659         struct wl_buffer *buffer;
1660
1661         if (time < device->input_device.pointer_focus_time)
1662                 return;
1663         if (device->input_device.pointer_focus == NULL)
1664                 return;
1665         if (device->input_device.pointer_focus->resource.client != client)
1666                 return;
1667
1668         if (buffer_resource) {
1669                 buffer = buffer_resource->data;
1670                 wlsc_input_device_attach_buffer(device, buffer, x, y);
1671         } else {
1672                 wlsc_input_device_set_pointer_image(device,
1673                                                     WLSC_POINTER_LEFT_PTR);
1674                 return;
1675         }
1676 }
1677
1678 const static struct wl_input_device_interface input_device_interface = {
1679         input_device_attach,
1680 };
1681
1682 static void unbind_input_device(struct wl_resource *resource)
1683 {
1684         wl_list_remove(&resource->link);
1685         free(resource);
1686 }
1687
1688 static void
1689 bind_input_device(struct wl_client *client,
1690                   void *data, uint32_t version, uint32_t id)
1691 {
1692         struct wl_input_device *device = data;
1693         struct wl_resource *resource;
1694
1695         resource = wl_client_add_object(client, &wl_input_device_interface,
1696                                         &input_device_interface, id, data);
1697         wl_list_insert(&device->resource_list, &resource->link);
1698         resource->destroy = unbind_input_device;
1699 }
1700
1701 WL_EXPORT void
1702 wlsc_input_device_init(struct wlsc_input_device *device,
1703                        struct wlsc_compositor *ec)
1704 {
1705         wl_input_device_init(&device->input_device, &ec->compositor);
1706
1707         wl_display_add_global(ec->wl_display, &wl_input_device_interface,
1708                               device, bind_input_device);
1709
1710         device->sprite = wlsc_surface_create(ec,
1711                                              device->input_device.x,
1712                                              device->input_device.y, 32, 32);
1713         wl_list_insert(&ec->surface_list, &device->sprite->link);
1714
1715         device->hotspot_x = 16;
1716         device->hotspot_y = 16;
1717         device->modifier_state = 0;
1718
1719         device->input_device.implicit_grab.interface = &implicit_grab_interface;
1720
1721         wl_list_insert(ec->input_device_list.prev, &device->link);
1722
1723         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1724 }
1725
1726 static void
1727 bind_output(struct wl_client *client,
1728             void *data, uint32_t version, uint32_t id)
1729 {
1730         struct wlsc_output *output = data;
1731         struct wlsc_mode *mode;
1732         struct wl_resource *resource;
1733
1734         resource = wl_client_add_object(client,
1735                                         &wl_output_interface, NULL, id, data);
1736
1737         wl_resource_post_event(resource,
1738                                WL_OUTPUT_GEOMETRY,
1739                                output->x,
1740                                output->y,
1741                                output->mm_width,
1742                                output->mm_height,
1743                                output->subpixel,
1744                                output->make, output->model);
1745
1746         wl_list_for_each (mode, &output->mode_list, link) {
1747                 wl_resource_post_event(resource,
1748                                        WL_OUTPUT_MODE,
1749                                        mode->flags,
1750                                        mode->width,
1751                                        mode->height,
1752                                        mode->refresh);
1753         }
1754 }
1755
1756 static const char vertex_shader[] =
1757         "uniform mat4 proj;\n"
1758         "attribute vec2 position;\n"
1759         "attribute vec2 texcoord;\n"
1760         "varying vec2 v_texcoord;\n"
1761         "void main()\n"
1762         "{\n"
1763         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1764         "   v_texcoord = texcoord;\n"
1765         "}\n";
1766
1767 static const char texture_fragment_shader[] =
1768         "precision mediump float;\n"
1769         "varying vec2 v_texcoord;\n"
1770         "uniform sampler2D tex;\n"
1771         "void main()\n"
1772         "{\n"
1773         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1774         "}\n";
1775
1776 static const char solid_fragment_shader[] =
1777         "precision mediump float;\n"
1778         "uniform vec4 color;\n"
1779         "void main()\n"
1780         "{\n"
1781         "   gl_FragColor = color\n;"
1782         "}\n";
1783
1784 static int
1785 compile_shader(GLenum type, const char *source)
1786 {
1787         GLuint s;
1788         char msg[512];
1789         GLint status;
1790
1791         s = glCreateShader(type);
1792         glShaderSource(s, 1, &source, NULL);
1793         glCompileShader(s);
1794         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1795         if (!status) {
1796                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1797                 fprintf(stderr, "shader info: %s\n", msg);
1798                 return GL_NONE;
1799         }
1800
1801         return s;
1802 }
1803
1804 static int
1805 wlsc_shader_init(struct wlsc_shader *shader,
1806                  const char *vertex_source, const char *fragment_source)
1807 {
1808         char msg[512];
1809         GLint status;
1810
1811         shader->vertex_shader =
1812                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1813         shader->fragment_shader =
1814                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1815
1816         shader->program = glCreateProgram();
1817         glAttachShader(shader->program, shader->vertex_shader);
1818         glAttachShader(shader->program, shader->fragment_shader);
1819         glBindAttribLocation(shader->program, 0, "position");
1820         glBindAttribLocation(shader->program, 1, "texcoord");
1821
1822         glLinkProgram(shader->program);
1823         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1824         if (!status) {
1825                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1826                 fprintf(stderr, "link info: %s\n", msg);
1827                 return -1;
1828         }
1829
1830         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1831         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1832
1833         return 0;
1834 }
1835
1836 static int
1837 init_solid_shader(struct wlsc_shader *shader,
1838                   GLuint vertex_shader, const char *fragment_source)
1839 {
1840         GLint status;
1841         char msg[512];
1842
1843         shader->vertex_shader = vertex_shader;
1844         shader->fragment_shader =
1845                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1846
1847         shader->program = glCreateProgram();
1848         glAttachShader(shader->program, shader->vertex_shader);
1849         glAttachShader(shader->program, shader->fragment_shader);
1850         glBindAttribLocation(shader->program, 0, "position");
1851         glBindAttribLocation(shader->program, 1, "texcoord");
1852
1853         glLinkProgram(shader->program);
1854         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1855         if (!status) {
1856                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1857                 fprintf(stderr, "link info: %s\n", msg);
1858                 return -1;
1859         }
1860
1861         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1862         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1863
1864         return 0;
1865 }
1866
1867 WL_EXPORT void
1868 wlsc_output_destroy(struct wlsc_output *output)
1869 {
1870         pixman_region32_fini(&output->region);
1871         pixman_region32_fini(&output->previous_damage);
1872 }
1873
1874 WL_EXPORT void
1875 wlsc_output_move(struct wlsc_output *output, int x, int y)
1876 {
1877         struct wlsc_compositor *c = output->compositor;
1878         int flip;
1879
1880         output->x = x;
1881         output->y = y;
1882
1883         pixman_region32_init(&output->previous_damage);
1884         pixman_region32_init_rect(&output->region, x, y,
1885                                   output->current->width,
1886                                   output->current->height);
1887
1888         wlsc_matrix_init(&output->matrix);
1889         wlsc_matrix_translate(&output->matrix,
1890                               -output->x - output->current->width / 2.0,
1891                               -output->y - output->current->height / 2.0, 0);
1892
1893         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1894         wlsc_matrix_scale(&output->matrix,
1895                           2.0 / output->current->width,
1896                           flip * 2.0 / output->current->height, 1);
1897
1898         pixman_region32_union(&c->damage, &c->damage, &output->region);
1899 }
1900
1901 WL_EXPORT void
1902 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1903                  int x, int y, int width, int height, uint32_t flags)
1904 {
1905         output->compositor = c;
1906         output->x = x;
1907         output->y = y;
1908         output->mm_width = width;
1909         output->mm_height = height;
1910
1911         output->flags = flags;
1912         wlsc_output_move(output, x, y);
1913
1914         output->scanout_buffer_destroy_listener.func =
1915                 output_handle_scanout_buffer_destroy;
1916         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1917         wl_list_init(&output->frame_callback_list);
1918
1919         output->resource.object.interface = &wl_output_interface;
1920         wl_display_add_global(c->wl_display,
1921                               &wl_output_interface, output, bind_output);
1922 }
1923
1924 static void
1925 shm_buffer_created(struct wl_buffer *buffer)
1926 {
1927         struct wl_list *surfaces_attached_to;
1928
1929         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1930         if (!surfaces_attached_to) {
1931                 buffer->user_data = NULL;
1932                 return;
1933         }
1934
1935         wl_list_init(surfaces_attached_to);
1936
1937         buffer->user_data = surfaces_attached_to;
1938 }
1939
1940 static void
1941 shm_buffer_damaged(struct wl_buffer *buffer,
1942                    int32_t x, int32_t y, int32_t width, int32_t height)
1943 {
1944         struct wl_list *surfaces_attached_to = buffer->user_data;
1945         struct wlsc_surface *es;
1946         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1947
1948         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1949                 glBindTexture(GL_TEXTURE_2D, es->texture);
1950                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1951                              tex_width, buffer->height, 0,
1952                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1953                              wl_shm_buffer_get_data(buffer));
1954                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1955                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1956         }
1957 }
1958
1959 static void
1960 shm_buffer_destroyed(struct wl_buffer *buffer)
1961 {
1962         struct wl_list *surfaces_attached_to = buffer->user_data;
1963         struct wlsc_surface *es, *next;
1964
1965         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1966                 wl_list_remove(&es->buffer_link);
1967                 wl_list_init(&es->buffer_link);
1968         }
1969
1970         free(surfaces_attached_to);
1971 }
1972
1973 const static struct wl_shm_callbacks shm_callbacks = {
1974         shm_buffer_created,
1975         shm_buffer_damaged,
1976         shm_buffer_destroyed
1977 };
1978
1979 WL_EXPORT int
1980 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1981 {
1982         struct wl_event_loop *loop;
1983         const char *extensions;
1984
1985         ec->wl_display = display;
1986
1987         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1988
1989         ec->shm = wl_shm_init(display, &shm_callbacks);
1990
1991         ec->image_target_texture_2d =
1992                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1993         ec->image_target_renderbuffer_storage = (void *)
1994                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1995         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1996         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1997         ec->bind_display =
1998                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1999         ec->unbind_display =
2000                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
2001
2002         extensions = (const char *) glGetString(GL_EXTENSIONS);
2003         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
2004                 fprintf(stderr,
2005                         "GL_EXT_texture_format_BGRA8888 not available\n");
2006                 return -1;
2007         }
2008
2009         extensions =
2010                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
2011         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
2012                 ec->has_bind_display = 1;
2013         if (ec->has_bind_display)
2014                 ec->bind_display(ec->display, ec->wl_display);
2015
2016         wl_list_init(&ec->surface_list);
2017         wl_list_init(&ec->input_device_list);
2018         wl_list_init(&ec->output_list);
2019         wl_list_init(&ec->binding_list);
2020         wl_list_init(&ec->animation_list);
2021         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
2022         ec->fade.animation.frame = fade_frame;
2023         wl_list_init(&ec->fade.animation.link);
2024
2025         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
2026                                     MODIFIER_CTRL | MODIFIER_ALT,
2027                                     terminate_binding, ec);
2028
2029         create_pointer_images(ec);
2030
2031         screenshooter_create(ec);
2032
2033         glActiveTexture(GL_TEXTURE0);
2034
2035         if (wlsc_shader_init(&ec->texture_shader,
2036                              vertex_shader, texture_fragment_shader) < 0)
2037                 return -1;
2038         if (init_solid_shader(&ec->solid_shader,
2039                               ec->texture_shader.vertex_shader,
2040                               solid_fragment_shader) < 0)
2041                 return -1;
2042
2043         loop = wl_display_get_event_loop(ec->wl_display);
2044         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
2045         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
2046
2047         pixman_region32_init(&ec->damage);
2048         wlsc_compositor_schedule_repaint(ec);
2049
2050         return 0;
2051 }
2052
2053 WL_EXPORT void
2054 wlsc_compositor_shutdown(struct wlsc_compositor *ec)
2055 {
2056         struct wlsc_output *output;
2057
2058         /* Destroy all outputs associated with this compositor */
2059         wl_list_for_each(output, &ec->output_list, link)
2060                 output->destroy(output);
2061 }
2062
2063 static int on_term_signal(int signal_number, void *data)
2064 {
2065         struct wl_display *display = data;
2066
2067         fprintf(stderr, "caught signal %d\n", signal_number);
2068         wl_display_terminate(display);
2069
2070         return 1;
2071 }
2072
2073 static void *
2074 load_module(const char *name, const char *entrypoint, void **handle)
2075 {
2076         char path[PATH_MAX];
2077         void *module, *init;
2078
2079         if (name[0] != '/')
2080                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
2081         else
2082                 snprintf(path, sizeof path, "%s", name);
2083
2084         module = dlopen(path, RTLD_LAZY);
2085         if (!module) {
2086                 fprintf(stderr,
2087                         "failed to load module: %s\n", dlerror());
2088                 return NULL;
2089         }
2090
2091         init = dlsym(module, entrypoint);
2092         if (!init) {
2093                 fprintf(stderr,
2094                         "failed to lookup init function: %s\n", dlerror());
2095                 return NULL;
2096         }
2097
2098         return init;
2099 }
2100
2101 int main(int argc, char *argv[])
2102 {
2103         struct wl_display *display;
2104         struct wlsc_compositor *ec;
2105         struct wl_event_loop *loop;
2106         int o, xserver = 0;
2107         void *shell_module, *backend_module;
2108         int (*shell_init)(struct wlsc_compositor *ec);
2109         struct wlsc_compositor
2110                 *(*backend_init)(struct wl_display *display, char *options);
2111         char *backend = NULL;
2112         char *backend_options = "";
2113         char *shell = NULL;
2114         char *p;
2115
2116         static const char opts[] = "B:b:o:S:i:s:x";
2117         static const struct option longopts[ ] = {
2118                 { "backend", 1, NULL, 'B' },
2119                 { "backend-options", 1, NULL, 'o' },
2120                 { "socket", 1, NULL, 'S' },
2121                 { "idle-time", 1, NULL, 'i' },
2122                 { "shell", 1, NULL, 's' },
2123                 { "xserver", 0, NULL, 'x' },
2124                 { NULL, }
2125         };
2126
2127         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
2128                 switch (o) {
2129                 case 'B':
2130                         backend = optarg;
2131                         break;
2132                 case 'o':
2133                         backend_options = optarg;
2134                         break;
2135                 case 'S':
2136                         option_socket_name = optarg;
2137                         break;
2138                 case 'i':
2139                         option_idle_time = strtol(optarg, &p, 0);
2140                         if (*p != '\0') {
2141                                 fprintf(stderr,
2142                                         "invalid idle time option: %s\n",
2143                                         optarg);
2144                                 exit(EXIT_FAILURE);
2145                         }
2146                         break;
2147                 case 's':
2148                         shell = optarg;
2149                         break;
2150                 case 'x':
2151                         xserver = 1;
2152                         break;
2153                 }
2154         }
2155
2156         display = wl_display_create();
2157
2158         loop = wl_display_get_event_loop(display);
2159         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, display);
2160         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, display);
2161         wl_event_loop_add_signal(loop, SIGQUIT, on_term_signal, display);
2162
2163         wl_list_init(&child_process_list);
2164         wl_event_loop_add_signal(loop, SIGCHLD, sigchld_handler, NULL);
2165
2166         if (!backend) {
2167                 if (getenv("WAYLAND_DISPLAY"))
2168                         backend = "wayland-backend.so";
2169                 else if (getenv("DISPLAY"))
2170                         backend = "x11-backend.so";
2171                 else if (getenv("OPENWFD"))
2172                         backend = "openwfd-backend.so";
2173                 else
2174                         backend = "drm-backend.so";
2175         }
2176
2177         if (!shell)
2178                 shell = "desktop-shell.so";
2179
2180         backend_init = load_module(backend, "backend_init", &backend_module);
2181         if (!backend_init)
2182                 exit(EXIT_FAILURE);
2183
2184         shell_init = load_module(shell, "shell_init", &shell_module);
2185         if (!shell_init)
2186                 exit(EXIT_FAILURE);
2187
2188         ec = backend_init(display, backend_options);
2189         if (ec == NULL) {
2190                 fprintf(stderr, "failed to create compositor\n");
2191                 exit(EXIT_FAILURE);
2192         }
2193
2194         if (shell_init(ec) < 0)
2195                 exit(EXIT_FAILURE);
2196
2197         if (xserver)
2198                 wlsc_xserver_init(ec);
2199
2200         if (wl_display_add_socket(display, option_socket_name)) {
2201                 fprintf(stderr, "failed to add socket: %m\n");
2202                 exit(EXIT_FAILURE);
2203         }
2204
2205         wl_display_run(display);
2206
2207         if (xserver)
2208                 wlsc_xserver_destroy(ec);
2209
2210         if (ec->has_bind_display)
2211                 ec->unbind_display(ec->display, display);
2212         wl_display_destroy(display);
2213
2214         ec->destroy(ec);
2215
2216         return 0;
2217 }