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 <sys/ioctl.h>
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32 #include <gdk-pixbuf/gdk-pixbuf.h>
  33 #include <math.h>
  34 #include <linux/input.h>
  35
  36 #include "wayland-server.h"
  37 #include "compositor.h"
  38
  39 struct wlsc_switcher {
  40         struct wlsc_compositor *compositor;
  41         struct wlsc_surface *current;
  42         struct wl_listener listener;
  43 };
  44
  45 /* The plan here is to generate a random anonymous socket name and
  46  * advertise that through a service on the session dbus.
  47  */
  48 static const char *option_socket_name = NULL;
  49 static const char *option_background = "background.jpg";
  50 static const char *option_geometry = "1024x640";
  51 static int option_connector = 0;
  52
  53 static const GOptionEntry option_entries[] = {
  54         { "background", 'b', 0, G_OPTION_ARG_STRING,
  55           &option_background, "Background image" },
  56         { "connector", 'c', 0, G_OPTION_ARG_INT,
  57           &option_connector, "KMS connector" },
  58         { "geometry", 'g', 0, G_OPTION_ARG_STRING,
  59           &option_geometry, "Geometry" },
  60         { "socket", 's', 0, G_OPTION_ARG_STRING,
  61           &option_socket_name, "Socket Name" },
  62         { NULL }
  63 };
  64
  65 static void
  66 wlsc_matrix_init(struct wlsc_matrix *matrix)
  67 {
  68         static const struct wlsc_matrix identity = {
  69                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  70         };
  71
  72         memcpy(matrix, &identity, sizeof identity);
  73 }
  74
  75 static void
  76 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  77 {
  78         struct wlsc_matrix tmp;
  79         const GLfloat *row, *column;
  80         div_t d;
  81         int i, j;
  82
  83         for (i = 0; i < 16; i++) {
  84                 tmp.d[i] = 0;
  85                 d = div(i, 4);
  86                 row = m->d + d.quot * 4;
  87                 column = n->d + d.rem;
  88                 for (j = 0; j < 4; j++)
  89                         tmp.d[i] += row[j] * column[j * 4];
  90         }
  91         memcpy(m, &tmp, sizeof tmp);
  92 }
  93
  94 static void
  95 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  96 {
  97         struct wlsc_matrix translate = {
  98                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
  99         };
 100
 101         wlsc_matrix_multiply(matrix, &translate);
 102 }
 103
 104 static void
 105 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
 106 {
 107         struct wlsc_matrix scale = {
 108                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
 109         };
 110
 111         wlsc_matrix_multiply(matrix, &scale);
 112 }
 113
 114 static void
 115 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 116 {
 117         int i, j;
 118         struct wlsc_vector t;
 119
 120         for (i = 0; i < 4; i++) {
 121                 t.f[i] = 0;
 122                 for (j = 0; j < 4; j++)
 123                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 124         }
 125
 126         *v = t;
 127 }
 128
 129 static struct wlsc_surface *
 130 wlsc_surface_create(struct wlsc_compositor *compositor,
 131                     int32_t x, int32_t y, int32_t width, int32_t height)
 132 {
 133         struct wlsc_surface *surface;
 134
 135         surface = malloc(sizeof *surface);
 136         if (surface == NULL)
 137                 return NULL;
 138
 139         wl_list_init(&surface->surface.destroy_listener_list);
 140         wl_list_init(&surface->link);
 141         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 142
 143         glGenTextures(1, &surface->texture);
 144         glBindTexture(GL_TEXTURE_2D, surface->texture);
 145         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 146         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 147         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 148         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 149
 150         surface->compositor = compositor;
 151         surface->visual = NULL;
 152         surface->x = x;
 153         surface->y = y;
 154         surface->width = width;
 155         surface->height = height;
 156         wlsc_matrix_init(&surface->matrix);
 157         wlsc_matrix_scale(&surface->matrix, width, height, 1);
 158         wlsc_matrix_translate(&surface->matrix, x, y, 0);
 159
 160         wlsc_matrix_init(&surface->matrix_inv);
 161         wlsc_matrix_translate(&surface->matrix_inv, -x, -y, 0);
 162         wlsc_matrix_scale(&surface->matrix_inv, 1.0 / width, 1.0 / height, 1);
 163
 164         return surface;
 165 }
 166
 167 void
 168 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 169                               int32_t x, int32_t y,
 170                               int32_t width, int32_t height)
 171 {
 172         struct wlsc_compositor *compositor = surface->compositor;
 173
 174         pixman_region32_union_rect(&compositor->damage_region,
 175                                    &compositor->damage_region,
 176                                    surface->x + x, surface->y + y,
 177                                    width, height);
 178         wlsc_compositor_schedule_repaint(compositor);
 179 }
 180
 181 void
 182 wlsc_surface_damage(struct wlsc_surface *surface)
 183 {
 184         wlsc_surface_damage_rectangle(surface, 0, 0,
 185                                       surface->width, surface->height);
 186 }
 187
 188 uint32_t
 189 get_time(void)
 190 {
 191         struct timeval tv;
 192
 193         gettimeofday(&tv, NULL);
 194
 195         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 196 }
 197
 198 static void
 199 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 200 {
 201         struct wlsc_surface *surface =
 202                 container_of(resource, struct wlsc_surface, surface.resource);
 203         struct wl_listener *l, *next;
 204         uint32_t time;
 205
 206         wlsc_surface_damage(surface);
 207
 208         wl_list_remove(&surface->link);
 209         glDeleteTextures(1, &surface->texture);
 210
 211         time = get_time();
 212         wl_list_for_each_safe(l, next,
 213                               &surface->surface.destroy_listener_list, link)
 214                 l->func(l, &surface->surface, time);
 215
 216         free(surface);
 217 }
 218
 219 uint32_t *
 220 wlsc_load_image(const char *filename, int width, int height)
 221 {
 222         GdkPixbuf *pixbuf;
 223         GError *error = NULL;
 224         int stride, i, n_channels;
 225         unsigned char *pixels, *end, *argb_pixels, *s, *d;
 226
 227         pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
 228                                                    width, height,
 229                                                    FALSE, &error);
 230         if (error != NULL) {
 231                 fprintf(stderr, "failed to load image: %s\n", error->message);
 232                 g_error_free(error);
 233                 return NULL;
 234         }
 235
 236         stride = gdk_pixbuf_get_rowstride(pixbuf);
 237         pixels = gdk_pixbuf_get_pixels(pixbuf);
 238         n_channels = gdk_pixbuf_get_n_channels(pixbuf);
 239
 240         argb_pixels = malloc (height * width * 4);
 241         if (argb_pixels == NULL) {
 242                 g_object_unref(pixbuf);
 243                 return NULL;
 244         }
 245
 246         if (n_channels == 4) {
 247                 for (i = 0; i < height; i++) {
 248                         s = pixels + i * stride;
 249                         end = s + width * 4;
 250                         d = argb_pixels + i * width * 4;
 251                         while (s < end) {
 252                                 unsigned int t;
 253
 254 #define MULT(_d,c,a,t) \
 255         do { t = c * a + 0x7f; _d = ((t >> 8) + t) >> 8; } while (0)
 256
 257                                 MULT(d[0], s[2], s[3], t);
 258                                 MULT(d[1], s[1], s[3], t);
 259                                 MULT(d[2], s[0], s[3], t);
 260                                 d[3] = s[3];
 261                                 s += 4;
 262                                 d += 4;
 263                         }
 264                 }
 265         } else if (n_channels == 3) {
 266                 for (i = 0; i < height; i++) {
 267                         s = pixels + i * stride;
 268                         end = s + width * 3;
 269                         d = argb_pixels + i * width * 4;
 270                         while (s < end) {
 271                                 d[0] = s[2];
 272                                 d[1] = s[1];
 273                                 d[2] = s[0];
 274                                 d[3] = 0xff;
 275                                 s += 3;
 276                                 d += 4;
 277                         }
 278                 }
 279         }
 280
 281         g_object_unref(pixbuf);
 282
 283         return (uint32_t *) argb_pixels;
 284 }
 285
 286 static void
 287 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 288 {
 289         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 290         struct wlsc_compositor *ec = es->compositor;
 291         EGLImageKHR *image;
 292
 293         if (buffer->attach) {
 294                 buffer->attach(buffer, surface);
 295         } else {
 296                 image = eglCreateImageKHR(ec->display, ec->context,
 297                                           EGL_WAYLAND_BUFFER_WL,
 298                                           buffer, NULL);
 299
 300                 glBindTexture(GL_TEXTURE_2D, es->texture);
 301                 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
 302                 es->visual = buffer->visual;
 303                 eglDestroyImageKHR(ec->display, image);
 304         }
 305 }
 306
 307 static struct wl_buffer *
 308 create_buffer_from_png(struct wlsc_compositor *ec,
 309                        const char *filename, int width, int height)
 310 {
 311         uint32_t *pixels;
 312         struct wl_buffer *buffer;
 313
 314         pixels = wlsc_load_image(filename, width, height);
 315         if(pixels == NULL)
 316             return NULL;
 317
 318         buffer = ec->create_buffer(ec, width, height, width * 4,
 319                                    &ec->compositor.premultiplied_argb_visual,
 320                                    pixels);
 321
 322         free(pixels);
 323
 324         return buffer;
 325 }
 326
 327 static const struct {
 328         const char *filename;
 329         int hotspot_x, hotspot_y;
 330 } pointer_images[] = {
 331         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 332         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 333         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 334         { DATADIR "/wayland/grabbing.png",              20, 17 },
 335         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 336         { DATADIR "/wayland/left_side.png",             10, 20 },
 337         { DATADIR "/wayland/right_side.png",            30, 19 },
 338         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 339         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 340         { DATADIR "/wayland/top_side.png",              18,  8 },
 341         { DATADIR "/wayland/xterm.png",                 15, 15 }
 342 };
 343
 344 static void
 345 create_pointer_images(struct wlsc_compositor *ec)
 346 {
 347         int i, count;
 348         const int width = 32, height = 32;
 349
 350         count = ARRAY_LENGTH(pointer_images);
 351         ec->pointer_buffers = malloc(count * sizeof *ec->pointer_buffers);
 352         for (i = 0; i < count; i++) {
 353                 ec->pointer_buffers[i] =
 354                         create_buffer_from_png(ec,
 355                                                pointer_images[i].filename,
 356                                                width, height);
 357         }
 358 }
 359
 360 static struct wlsc_surface *
 361 background_create(struct wlsc_output *output, const char *filename)
 362 {
 363         struct wlsc_surface *background;
 364         struct wl_buffer *buffer;
 365
 366         background = wlsc_surface_create(output->compositor,
 367                                          output->x, output->y,
 368                                          output->width, output->height);
 369         if (background == NULL)
 370                 return NULL;
 371
 372         buffer = create_buffer_from_png(output->compositor,
 373                                         filename,
 374                                         output->width, output->height);
 375         if (buffer == NULL) {
 376                 free(background);
 377                 return NULL;
 378         }
 379
 380         wlsc_buffer_attach(buffer, &background->surface);
 381
 382         return background;
 383 }
 384
 385 static void
 386 wlsc_surface_draw(struct wlsc_surface *es,
 387                   struct wlsc_output *output, pixman_region32_t *clip)
 388 {
 389         struct wlsc_compositor *ec = es->compositor;
 390         GLfloat *v, inv_width, inv_height;
 391         unsigned int *p;
 392         pixman_region32_t repaint;
 393         pixman_box32_t *rectangles;
 394         int i, n;
 395
 396         pixman_region32_init_rect(&repaint,
 397                                   es->x, es->y, es->width, es->height);
 398         pixman_region32_intersect(&repaint, &repaint, clip);
 399         if (!pixman_region32_not_empty(&repaint))
 400                 return;
 401
 402         if (es->visual == &ec->compositor.argb_visual) {
 403                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 404                 glEnable(GL_BLEND);
 405         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 406                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 407                 glEnable(GL_BLEND);
 408         } else {
 409                 glDisable(GL_BLEND);
 410         }
 411
 412         rectangles = pixman_region32_rectangles(&repaint, &n);
 413         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 414         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 415         inv_width = 1.0 / es->width;
 416         inv_height = 1.0 / es->height;
 417         for (i = 0; i < n; i++, v += 16, p += 6) {
 418                 v[ 0] = rectangles[i].x1;
 419                 v[ 1] = rectangles[i].y1;
 420                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 421                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 422
 423                 v[ 4] = rectangles[i].x1;
 424                 v[ 5] = rectangles[i].y2;
 425                 v[ 6] = v[ 2];
 426                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 427
 428                 v[ 8] = rectangles[i].x2;
 429                 v[ 9] = rectangles[i].y1;
 430                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 431                 v[11] = v[ 3];
 432
 433                 v[12] = rectangles[i].x2;
 434                 v[13] = rectangles[i].y2;
 435                 v[14] = v[10];
 436                 v[15] = v[ 7];
 437
 438                 p[0] = i * 4 + 0;
 439                 p[1] = i * 4 + 1;
 440                 p[2] = i * 4 + 2;
 441                 p[3] = i * 4 + 2;
 442                 p[4] = i * 4 + 1;
 443                 p[5] = i * 4 + 3;
 444         }
 445
 446         glBindTexture(GL_TEXTURE_2D, es->texture);
 447         v = ec->vertices.data;
 448         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 449         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 450         glEnableVertexAttribArray(0);
 451         glEnableVertexAttribArray(1);
 452         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 453
 454         ec->vertices.size = 0;
 455         ec->indices.size = 0;
 456         pixman_region32_fini(&repaint);
 457 }
 458
 459 static void
 460 wlsc_surface_raise(struct wlsc_surface *surface)
 461 {
 462         struct wlsc_compositor *compositor = surface->compositor;
 463
 464         wl_list_remove(&surface->link);
 465         wl_list_insert(&compositor->surface_list, &surface->link);
 466 }
 467
 468 void
 469 wlsc_surface_update_matrix(struct wlsc_surface *es)
 470 {
 471         wlsc_matrix_init(&es->matrix);
 472         wlsc_matrix_scale(&es->matrix, es->width, es->height, 1);
 473         wlsc_matrix_translate(&es->matrix, es->x, es->y, 0);
 474
 475         wlsc_matrix_init(&es->matrix_inv);
 476         wlsc_matrix_translate(&es->matrix_inv, -es->x, -es->y, 0);
 477         wlsc_matrix_scale(&es->matrix_inv,
 478                           1.0 / es->width, 1.0 / es->height, 1);
 479 }
 480
 481 void
 482 wlsc_compositor_finish_frame(struct wlsc_compositor *compositor, int msecs)
 483 {
 484         wl_display_post_frame(compositor->wl_display, msecs);
 485         wl_event_source_timer_update(compositor->timer_source, 5);
 486         compositor->repaint_on_timeout = 1;
 487 }
 488
 489 static void
 490 wlsc_output_repaint(struct wlsc_output *output)
 491 {
 492         struct wlsc_compositor *ec = output->compositor;
 493         struct wlsc_surface *es;
 494         struct wlsc_input_device *eid;
 495         pixman_region32_t new_damage, total_damage;
 496
 497         output->prepare_render(output);
 498
 499         glViewport(0, 0, output->width, output->height);
 500
 501         glUniformMatrix4fv(ec->proj_uniform, 1, GL_FALSE, output->matrix.d);
 502         glUniform1i(ec->tex_uniform, 0);
 503
 504         pixman_region32_init(&new_damage);
 505         pixman_region32_init(&total_damage);
 506         pixman_region32_intersect_rect(&new_damage,
 507                                        &ec->damage_region,
 508                                        output->x, output->y,
 509                                        output->width, output->height);
 510         pixman_region32_subtract(&ec->damage_region,
 511                                  &ec->damage_region, &new_damage);
 512         pixman_region32_union(&total_damage, &new_damage,
 513                               &output->previous_damage_region);
 514         pixman_region32_copy(&output->previous_damage_region, &new_damage);
 515
 516         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 517         if (es->map_type == WLSC_SURFACE_MAP_FULLSCREEN &&
 518             es->fullscreen_output == output) {
 519                 if (es->width < output->width || es->height < output->height)
 520                         glClear(GL_COLOR_BUFFER_BIT);
 521                 wlsc_surface_draw(es, output, &total_damage);
 522         } else {
 523                 if (output->background)
 524                         wlsc_surface_draw(output->background,
 525                                           output, &total_damage);
 526                 else
 527                         glClear(GL_COLOR_BUFFER_BIT);
 528
 529                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 530                         if (ec->switcher &&
 531                             ec->switcher->current == es)
 532                                 continue;
 533
 534                         wlsc_surface_draw(es, output, &total_damage);
 535                 }
 536         }
 537
 538         if (ec->switcher)
 539                 wlsc_surface_draw(ec->switcher->current,
 540                                   output, &total_damage);
 541
 542         if (ec->focus)
 543                 wl_list_for_each(eid, &ec->input_device_list, link)
 544                         wlsc_surface_draw(eid->sprite, output, &total_damage);
 545 }
 546
 547 static void
 548 repaint(void *data)
 549 {
 550         struct wlsc_compositor *ec = data;
 551         struct wlsc_output *output;
 552
 553         if (!ec->repaint_needed) {
 554                 ec->repaint_on_timeout = 0;
 555                 return;
 556         }
 557
 558         wl_list_for_each(output, &ec->output_list, link)
 559                 wlsc_output_repaint(output);
 560
 561         ec->present(ec);
 562
 563         ec->repaint_needed = 0;
 564 }
 565
 566 void
 567 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 568 {
 569         compositor->repaint_needed = 1;
 570         if (compositor->repaint_on_timeout)
 571                 return;
 572
 573         wl_event_source_timer_update(compositor->timer_source, 1);
 574         compositor->repaint_on_timeout = 1;
 575 }
 576
 577 static void
 578 surface_destroy(struct wl_client *client,
 579                 struct wl_surface *surface)
 580 {
 581         wl_resource_destroy(&surface->resource, client);
 582 }
 583
 584 static void
 585 surface_attach(struct wl_client *client,
 586                struct wl_surface *surface, struct wl_buffer *buffer,
 587                int32_t x, int32_t y)
 588 {
 589         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 590
 591         /* FIXME: This damages the entire old surface, but we should
 592          * really just damage the part that's no longer covered by the
 593          * surface.  Anything covered by the new surface will be
 594          * damaged by the client. */
 595         wlsc_surface_damage(es);
 596
 597         wlsc_buffer_attach(buffer, surface);
 598
 599         es->buffer = buffer;
 600         es->x += x;
 601         es->y += y;
 602         es->width = buffer->width;
 603         es->height = buffer->height;
 604         wlsc_surface_update_matrix(es);
 605 }
 606
 607 static void
 608 surface_map_toplevel(struct wl_client *client,
 609                      struct wl_surface *surface)
 610 {
 611         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 612
 613         switch (es->map_type) {
 614         case WLSC_SURFACE_MAP_UNMAPPED:
 615                 es->x = 10 + random() % 400;
 616                 es->y = 10 + random() % 400;
 617                 wlsc_surface_update_matrix(es);
 618                 wl_list_insert(&es->compositor->surface_list, &es->link);
 619                 break;
 620         case WLSC_SURFACE_MAP_TOPLEVEL:
 621                 return;
 622         case WLSC_SURFACE_MAP_FULLSCREEN:
 623                 es->fullscreen_output = NULL;
 624                 es->x = es->saved_x;
 625                 es->y = es->saved_y;
 626                 wlsc_surface_update_matrix(es);
 627                 break;
 628         default:
 629                 break;
 630         }
 631
 632         wlsc_surface_damage(es);
 633         es->map_type = WLSC_SURFACE_MAP_TOPLEVEL;
 634 }
 635
 636 static void
 637 surface_map_transient(struct wl_client *client,
 638                       struct wl_surface *surface, struct wl_surface *parent,
 639                       int x, int y, uint32_t flags)
 640 {
 641         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 642         struct wlsc_surface *pes = (struct wlsc_surface *) parent;
 643
 644         switch (es->map_type) {
 645         case WLSC_SURFACE_MAP_UNMAPPED:
 646                 wl_list_insert(&es->compositor->surface_list, &es->link);
 647                 break;
 648         case WLSC_SURFACE_MAP_FULLSCREEN:
 649                 es->fullscreen_output = NULL;
 650                 break;
 651         default:
 652                 break;
 653         }
 654
 655         es->x = pes->x + x;
 656         es->y = pes->y + y;
 657
 658         wlsc_surface_update_matrix(es);
 659         wlsc_surface_damage(es);
 660         es->map_type = WLSC_SURFACE_MAP_TRANSIENT;
 661 }
 662
 663 static void
 664 surface_map_fullscreen(struct wl_client *client, struct wl_surface *surface)
 665 {
 666         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 667         struct wlsc_output *output;
 668
 669         switch (es->map_type) {
 670         case WLSC_SURFACE_MAP_UNMAPPED:
 671                 es->x = 10 + random() % 400;
 672                 es->y = 10 + random() % 400;
 673                 wl_list_insert(&es->compositor->surface_list, &es->link);
 674                 break;
 675         case WLSC_SURFACE_MAP_FULLSCREEN:
 676                 return;
 677         default:
 678                 break;
 679         }
 680
 681         /* FIXME: Fullscreen on first output */
 682         /* FIXME: Handle output going away */
 683         output = container_of(es->compositor->output_list.next,
 684                               struct wlsc_output, link);
 685
 686         es->saved_x = es->x;
 687         es->saved_y = es->y;
 688         es->x = (output->width - es->width) / 2;
 689         es->y = (output->height - es->height) / 2;
 690         es->fullscreen_output = output;
 691         wlsc_surface_update_matrix(es);
 692         wlsc_surface_damage(es);
 693         es->map_type = WLSC_SURFACE_MAP_FULLSCREEN;
 694 }
 695
 696 static void
 697 surface_damage(struct wl_client *client,
 698                struct wl_surface *surface,
 699                int32_t x, int32_t y, int32_t width, int32_t height)
 700 {
 701         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 702
 703         es->buffer->damage(es->buffer, surface, x, y, width, height);
 704
 705         wlsc_surface_damage_rectangle(es, x, y, width, height);
 706 }
 707
 708 const static struct wl_surface_interface surface_interface = {
 709         surface_destroy,
 710         surface_attach,
 711         surface_map_toplevel,
 712         surface_map_transient,
 713         surface_map_fullscreen,
 714         surface_damage
 715 };
 716
 717 static void
 718 wlsc_input_device_attach(struct wlsc_input_device *device,
 719                          struct wl_buffer *buffer, int x, int y)
 720 {
 721         wlsc_surface_damage(device->sprite);
 722
 723         wlsc_buffer_attach(buffer, &device->sprite->surface);
 724         device->hotspot_x = x;
 725         device->hotspot_y = y;
 726
 727         device->sprite->x = device->input_device.x - device->hotspot_x;
 728         device->sprite->y = device->input_device.y - device->hotspot_y;
 729         device->sprite->width = buffer->width;
 730         device->sprite->height = buffer->height;
 731         wlsc_surface_update_matrix(device->sprite);
 732
 733         wlsc_surface_damage(device->sprite);
 734 }
 735
 736
 737 void
 738 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 739                                     enum wlsc_pointer_type type)
 740 {
 741         struct wlsc_compositor *compositor =
 742                 (struct wlsc_compositor *) device->input_device.compositor;
 743
 744         wlsc_input_device_attach(device,
 745                                  compositor->pointer_buffers[type],
 746                                  pointer_images[type].hotspot_x,
 747                                  pointer_images[type].hotspot_y);
 748 }
 749
 750 static void
 751 compositor_create_surface(struct wl_client *client,
 752                           struct wl_compositor *compositor, uint32_t id)
 753 {
 754         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
 755         struct wlsc_surface *surface;
 756
 757         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
 758         if (surface == NULL) {
 759                 wl_client_post_no_memory(client);
 760                 return;
 761         }
 762
 763         surface->surface.resource.destroy = destroy_surface;
 764
 765         surface->surface.resource.object.id = id;
 766         surface->surface.resource.object.interface = &wl_surface_interface;
 767         surface->surface.resource.object.implementation =
 768                 (void (**)(void)) &surface_interface;
 769         surface->surface.client = client;
 770
 771         wl_client_add_resource(client, &surface->surface.resource);
 772 }
 773
 774 const static struct wl_compositor_interface compositor_interface = {
 775         compositor_create_surface,
 776 };
 777
 778 static void
 779 wlsc_surface_transform(struct wlsc_surface *surface,
 780                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 781 {
 782         struct wlsc_vector v = { { x, y, 0, 1 } };
 783
 784         wlsc_matrix_transform(&surface->matrix_inv, &v);
 785         *sx = v.f[0] * surface->width;
 786         *sy = v.f[1] * surface->height;
 787 }
 788
 789 struct wlsc_surface *
 790 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
 791 {
 792         struct wlsc_compositor *ec =
 793                 (struct wlsc_compositor *) device->compositor;
 794         struct wlsc_surface *es;
 795
 796         wl_list_for_each(es, &ec->surface_list, link) {
 797                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
 798                 if (0 <= *sx && *sx < es->width &&
 799                     0 <= *sy && *sy < es->height)
 800                         return es;
 801         }
 802
 803         return NULL;
 804 }
 805
 806
 807 static void
 808 motion_grab_motion(struct wl_grab *grab,
 809                    uint32_t time, int32_t x, int32_t y)
 810 {
 811         struct wlsc_input_device *device =
 812                 (struct wlsc_input_device *) grab->input_device;
 813         struct wlsc_surface *es =
 814                 (struct wlsc_surface *) device->input_device.pointer_focus;
 815         int32_t sx, sy;
 816
 817         wlsc_surface_transform(es, x, y, &sx, &sy);
 818         wl_client_post_event(es->surface.client,
 819                              &device->input_device.object,
 820                              WL_INPUT_DEVICE_MOTION,
 821                              time, x, y, sx, sy);
 822 }
 823
 824 static void
 825 motion_grab_button(struct wl_grab *grab,
 826                    uint32_t time, int32_t button, int32_t state)
 827 {
 828         wl_client_post_event(grab->input_device->pointer_focus->client,
 829                              &grab->input_device->object,
 830                              WL_INPUT_DEVICE_BUTTON,
 831                              time, button, state);
 832 }
 833
 834 static void
 835 motion_grab_end(struct wl_grab *grab, uint32_t time)
 836 {
 837 }
 838
 839 static const struct wl_grab_interface motion_grab_interface = {
 840         motion_grab_motion,
 841         motion_grab_button,
 842         motion_grab_end
 843 };
 844
 845 void
 846 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
 847 {
 848         struct wlsc_surface *es;
 849         struct wlsc_compositor *ec =
 850                 (struct wlsc_compositor *) device->compositor;
 851         struct wlsc_output *output;
 852         const struct wl_grab_interface *interface;
 853         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 854         int32_t sx, sy;
 855         int x_valid = 0, y_valid = 0;
 856         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
 857
 858         wl_list_for_each(output, &ec->output_list, link) {
 859                 if (output->x <= x && x <= output->x + output->width)
 860                         x_valid = 1;
 861
 862                 if (output->y <= y && y <= output->y + output->height)
 863                         y_valid = 1;
 864
 865                 /* FIXME: calculate this only on output addition/deletion */
 866                 if (output->x < min_x)
 867                         min_x = output->x;
 868                 if (output->y < min_y)
 869                         min_y = output->y;
 870
 871                 if (output->x + output->width > max_x)
 872                         max_x = output->x + output->width;
 873                 if (output->y + output->height > max_y)
 874                         max_y = output->y + output->height;
 875         }
 876
 877         if (!x_valid) {
 878                 if (x < min_x)
 879                         x = min_x;
 880                 else if (x >= max_x)
 881                         x = max_x;
 882         }
 883         if (!y_valid) {
 884                 if (y < min_y)
 885                         y = min_y;
 886                 else  if (y >= max_y)
 887                         y = max_y;
 888         }
 889
 890         device->x = x;
 891         device->y = y;
 892
 893         if (device->grab) {
 894                 interface = device->grab->interface;
 895                 interface->motion(device->grab, time, x, y);
 896         } else {
 897                 es = pick_surface(device, &sx, &sy);
 898                 wl_input_device_set_pointer_focus(device,
 899                                                   &es->surface,
 900                                                   time, x, y, sx, sy);
 901                 if (es)
 902                         wl_client_post_event(es->surface.client,
 903                                              &device->object,
 904                                              WL_INPUT_DEVICE_MOTION,
 905                                              time, x, y, sx, sy);
 906         }
 907
 908         wlsc_surface_damage(wd->sprite);
 909
 910         wd->sprite->x = device->x - wd->hotspot_x;
 911         wd->sprite->y = device->y - wd->hotspot_y;
 912         wlsc_surface_update_matrix(wd->sprite);
 913
 914         wlsc_surface_damage(wd->sprite);
 915 }
 916
 917 static void
 918 wlsc_surface_activate(struct wlsc_surface *surface,
 919                       struct wlsc_input_device *device, uint32_t time)
 920 {
 921         wlsc_surface_raise(surface);
 922         if (device->selection)
 923                 wlsc_selection_set_focus(device->selection,
 924                                          &surface->surface, time);
 925
 926         wl_input_device_set_keyboard_focus(&device->input_device,
 927                                            &surface->surface,
 928                                            time);
 929 }
 930
 931 void
 932 notify_button(struct wl_input_device *device,
 933               uint32_t time, int32_t button, int32_t state)
 934 {
 935         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 936         struct wlsc_surface *surface;
 937         struct wlsc_compositor *compositor =
 938                 (struct wlsc_compositor *) device->compositor;
 939
 940         surface = (struct wlsc_surface *) device->pointer_focus;
 941         uint32_t edges = 0;
 942         int32_t x, y;
 943
 944         if (state && surface && device->grab == NULL) {
 945                 wlsc_surface_activate(surface, wd, time);
 946                 wl_input_device_start_grab(device,
 947                                            &device->motion_grab,
 948                                            button, time);
 949         }
 950
 951         if (state && surface && button == BTN_LEFT &&
 952             (wd->modifier_state & MODIFIER_SUPER))
 953                 shell_move(NULL,
 954                            (struct wl_shell *) &compositor->shell,
 955                            &surface->surface, device, time);
 956         else if (state && surface && button == BTN_MIDDLE &&
 957                  (wd->modifier_state & MODIFIER_SUPER)) {
 958
 959                 x = device->grab_x - surface->x;
 960                 y = device->grab_y - surface->y;
 961
 962                 if (x < surface->width / 3)
 963                         edges |= WL_SHELL_RESIZE_LEFT;
 964                 else if (x < 2 * surface->width / 3)
 965                         edges |= 0;
 966                 else
 967                         edges |= WL_SHELL_RESIZE_RIGHT;
 968
 969                 if (y < surface->height / 3)
 970                         edges |= WL_SHELL_RESIZE_TOP;
 971                 else if (y < 2 * surface->height / 3)
 972                         edges |= 0;
 973                 else
 974                         edges |= WL_SHELL_RESIZE_BOTTOM;
 975
 976                 shell_resize(NULL,
 977                              (struct wl_shell *) &compositor->shell,
 978                              &surface->surface, device, time, edges);
 979         }
 980
 981         if (device->grab)
 982                 device->grab->interface->button(device->grab, time,
 983                                                 button, state);
 984
 985         if (!state && device->grab && device->grab_button == button)
 986                 wl_input_device_end_grab(device, time);
 987 }
 988
 989 static void
 990 wlsc_switcher_next(struct wlsc_switcher *switcher)
 991 {
 992         struct wl_list *l;
 993
 994         wlsc_surface_damage(switcher->current);
 995         l = switcher->current->link.next;
 996         if (l == &switcher->compositor->surface_list)
 997                 l = switcher->compositor->surface_list.next;
 998         switcher->current = container_of(l, struct wlsc_surface, link);
 999         wl_list_remove(&switcher->listener.link);
1000         wl_list_insert(switcher->current->surface.destroy_listener_list.prev,
1001                        &switcher->listener.link);
1002         wlsc_surface_damage(switcher->current);
1003 }
1004
1005 static void
1006 switcher_handle_surface_destroy(struct wl_listener *listener,
1007                                 struct wl_surface *surface, uint32_t time)
1008 {
1009         struct wlsc_switcher *switcher =
1010                 container_of(listener, struct wlsc_switcher, listener);
1011
1012         wlsc_switcher_next(switcher);
1013 }
1014
1015 static struct wlsc_switcher *
1016 wlsc_switcher_create(struct wlsc_compositor *compositor)
1017 {
1018         struct wlsc_switcher *switcher;
1019
1020         switcher = malloc(sizeof *switcher);
1021         switcher->compositor = compositor;
1022         switcher->current = container_of(compositor->surface_list.next,
1023                                          struct wlsc_surface, link);
1024         switcher->listener.func = switcher_handle_surface_destroy;
1025         wl_list_init(&switcher->listener.link);
1026
1027         return switcher;
1028 }
1029
1030 static void
1031 wlsc_switcher_destroy(struct wlsc_switcher *switcher)
1032 {
1033         wl_list_remove(&switcher->listener.link);
1034         free(switcher);
1035 }
1036
1037 void
1038 notify_key(struct wl_input_device *device,
1039            uint32_t time, uint32_t key, uint32_t state)
1040 {
1041         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1042         struct wlsc_compositor *compositor =
1043                 (struct wlsc_compositor *) device->compositor;
1044         uint32_t *k, *end;
1045         uint32_t modifier;
1046
1047         switch (key | wd->modifier_state) {
1048         case KEY_BACKSPACE | MODIFIER_CTRL | MODIFIER_ALT:
1049                 wl_display_terminate(compositor->wl_display);
1050                 return;
1051
1052         case KEY_TAB | MODIFIER_SUPER:
1053                 if (!state)
1054                         return;
1055                 if (wl_list_empty(&compositor->surface_list))
1056                         return;
1057                 if (compositor->switcher == NULL)
1058                         compositor->switcher = wlsc_switcher_create(compositor);
1059
1060                 wlsc_switcher_next(compositor->switcher);
1061                 return;
1062
1063         case KEY_LEFTMETA | MODIFIER_SUPER:
1064         case KEY_RIGHTMETA | MODIFIER_SUPER:
1065                 if (compositor->switcher && !state) {
1066                         wlsc_surface_activate(compositor->switcher->current,
1067                                               wd, time);
1068                         wlsc_switcher_destroy(compositor->switcher);
1069                         compositor->switcher = NULL;
1070                 }
1071                 break;
1072         }
1073
1074         switch (key) {
1075         case KEY_LEFTCTRL:
1076         case KEY_RIGHTCTRL:
1077                 modifier = MODIFIER_CTRL;
1078                 break;
1079
1080         case KEY_LEFTALT:
1081         case KEY_RIGHTALT:
1082                 modifier = MODIFIER_ALT;
1083                 break;
1084
1085         case KEY_LEFTMETA:
1086         case KEY_RIGHTMETA:
1087                 modifier = MODIFIER_SUPER;
1088                 break;
1089
1090         default:
1091                 modifier = 0;
1092                 break;
1093         }
1094
1095         if (state)
1096                 wd->modifier_state |= modifier;
1097         else
1098                 wd->modifier_state &= ~modifier;
1099
1100         end = device->keys.data + device->keys.size;
1101         for (k = device->keys.data; k < end; k++) {
1102                 if (*k == key)
1103                         *k = *--end;
1104         }
1105         device->keys.size = (void *) end - device->keys.data;
1106         if (state) {
1107                 k = wl_array_add(&device->keys, sizeof *k);
1108                 *k = key;
1109         }
1110
1111         if (device->keyboard_focus != NULL)
1112                 wl_client_post_event(device->keyboard_focus->client,
1113                                      &device->object,
1114                                      WL_INPUT_DEVICE_KEY, time, key, state);
1115 }
1116
1117 void
1118 notify_pointer_focus(struct wl_input_device *device,
1119                      uint32_t time, struct wlsc_output *output,
1120                      int32_t x, int32_t y)
1121 {
1122         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1123         struct wlsc_compositor *compositor =
1124                 (struct wlsc_compositor *) device->compositor;
1125         struct wlsc_surface *es;
1126         int32_t sx, sy;
1127
1128         if (output) {
1129                 device->x = x;
1130                 device->y = y;
1131                 es = pick_surface(device, &sx, &sy);
1132                 wl_input_device_set_pointer_focus(device,
1133                                                   &es->surface,
1134                                                   time, x, y, sx, sy);
1135
1136                 compositor->focus = 1;
1137
1138                 wd->sprite->x = device->x - wd->hotspot_x;
1139                 wd->sprite->y = device->y - wd->hotspot_y;
1140                 wlsc_surface_update_matrix(wd->sprite);
1141         } else {
1142                 wl_input_device_set_pointer_focus(device, NULL,
1143                                                   time, 0, 0, 0, 0);
1144                 compositor->focus = 0;
1145         }
1146
1147         wlsc_surface_damage(wd->sprite);
1148 }
1149
1150 void
1151 notify_keyboard_focus(struct wl_input_device *device,
1152                       uint32_t time, struct wlsc_output *output,
1153                       struct wl_array *keys)
1154 {
1155         struct wlsc_input_device *wd =
1156                 (struct wlsc_input_device *) device;
1157         struct wlsc_compositor *compositor =
1158                 (struct wlsc_compositor *) device->compositor;
1159         struct wlsc_surface *es;
1160
1161         if (!wl_list_empty(&compositor->surface_list))
1162                 es = container_of(compositor->surface_list.next,
1163                                   struct wlsc_surface, link);
1164         else
1165                 es = NULL;
1166
1167         if (output) {
1168                 wl_array_copy(&wd->input_device.keys, keys);
1169                 wl_input_device_set_keyboard_focus(&wd->input_device,
1170                                                    &es->surface, time);
1171         } else {
1172                 wl_input_device_set_keyboard_focus(&wd->input_device,
1173                                                    NULL, time);
1174         }
1175 }
1176
1177
1178 static void
1179 input_device_attach(struct wl_client *client,
1180                     struct wl_input_device *device_base,
1181                     uint32_t time,
1182                     struct wl_buffer *buffer, int32_t x, int32_t y)
1183 {
1184         struct wlsc_input_device *device =
1185                 (struct wlsc_input_device *) device_base;
1186
1187         if (time < device->input_device.pointer_focus_time)
1188                 return;
1189         if (device->input_device.pointer_focus == NULL)
1190                 return;
1191         if (device->input_device.pointer_focus->client != client)
1192                 return;
1193
1194         if (buffer == NULL) {
1195                 wlsc_input_device_set_pointer_image(device,
1196                                                     WLSC_POINTER_LEFT_PTR);
1197                 return;
1198         }
1199
1200         wlsc_input_device_attach(device, buffer, x, y);
1201 }
1202
1203 const static struct wl_input_device_interface input_device_interface = {
1204         input_device_attach,
1205 };
1206
1207 void
1208 wlsc_input_device_init(struct wlsc_input_device *device,
1209                        struct wlsc_compositor *ec)
1210 {
1211         wl_input_device_init(&device->input_device, &ec->compositor);
1212
1213         device->input_device.object.interface = &wl_input_device_interface;
1214         device->input_device.object.implementation =
1215                 (void (**)(void)) &input_device_interface;
1216         wl_display_add_object(ec->wl_display, &device->input_device.object);
1217         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1218
1219         device->sprite = wlsc_surface_create(ec,
1220                                              device->input_device.x,
1221                                              device->input_device.y, 32, 32);
1222         device->hotspot_x = 16;
1223         device->hotspot_y = 16;
1224
1225         device->input_device.motion_grab.interface = &motion_grab_interface;
1226
1227         wl_list_insert(ec->input_device_list.prev, &device->link);
1228
1229         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1230 }
1231
1232 static void
1233 wlsc_output_post_geometry(struct wl_client *client, struct wl_object *global)
1234 {
1235         struct wlsc_output *output =
1236                 container_of(global, struct wlsc_output, object);
1237
1238         wl_client_post_event(client, global,
1239                              WL_OUTPUT_GEOMETRY,
1240                              output->x, output->y,
1241                              output->width, output->height);
1242 }
1243
1244 static const char vertex_shader[] =
1245         "uniform mat4 proj;\n"
1246         "attribute vec2 position;\n"
1247         "attribute vec2 texcoord;\n"
1248         "varying vec2 v_texcoord;\n"
1249         "void main()\n"
1250         "{\n"
1251         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1252         "   v_texcoord = texcoord;\n"
1253         "}\n";
1254
1255 static const char fragment_shader[] =
1256         "precision mediump float;\n"
1257         "varying vec2 v_texcoord;\n"
1258         "uniform sampler2D tex;\n"
1259         "void main()\n"
1260         "{\n"
1261         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1262         "}\n";
1263
1264 static int
1265 init_shaders(struct wlsc_compositor *ec)
1266 {
1267         GLuint v, f, program;
1268         const char *p;
1269         char msg[512];
1270         GLint status;
1271
1272         p = vertex_shader;
1273         v = glCreateShader(GL_VERTEX_SHADER);
1274         glShaderSource(v, 1, &p, NULL);
1275         glCompileShader(v);
1276         glGetShaderiv(v, GL_COMPILE_STATUS, &status);
1277         if (!status) {
1278                 glGetShaderInfoLog(v, sizeof msg, NULL, msg);
1279                 fprintf(stderr, "vertex shader info: %s\n", msg);
1280                 return -1;
1281         }
1282
1283         p = fragment_shader;
1284         f = glCreateShader(GL_FRAGMENT_SHADER);
1285         glShaderSource(f, 1, &p, NULL);
1286         glCompileShader(f);
1287         glGetShaderiv(f, GL_COMPILE_STATUS, &status);
1288         if (!status) {
1289                 glGetShaderInfoLog(f, sizeof msg, NULL, msg);
1290                 fprintf(stderr, "fragment shader info: %s\n", msg);
1291                 return -1;
1292         }
1293
1294         program = glCreateProgram();
1295         glAttachShader(program, v);
1296         glAttachShader(program, f);
1297         glBindAttribLocation(program, 0, "position");
1298         glBindAttribLocation(program, 1, "texcoord");
1299
1300         glLinkProgram(program);
1301         glGetProgramiv(program, GL_LINK_STATUS, &status);
1302         if (!status) {
1303                 glGetProgramInfoLog(program, sizeof msg, NULL, msg);
1304                 fprintf(stderr, "link info: %s\n", msg);
1305                 return -1;
1306         }
1307
1308         glUseProgram(program);
1309         ec->proj_uniform = glGetUniformLocation(program, "proj");
1310         ec->tex_uniform = glGetUniformLocation(program, "tex");
1311
1312         return 0;
1313 }
1314
1315 void
1316 wlsc_output_destroy(struct wlsc_output *output)
1317 {
1318         destroy_surface(&output->background->surface.resource, NULL);
1319 }
1320
1321 void
1322 wlsc_output_move(struct wlsc_output *output, int x, int y)
1323 {
1324         struct wlsc_compositor *c = output->compositor;
1325         int flip;
1326
1327         output->x = x;
1328         output->y = y;
1329
1330         if (output->background) {
1331                 output->background->x = x;
1332                 output->background->y = y;
1333                 wlsc_surface_update_matrix(output->background);
1334         }
1335
1336         pixman_region32_init(&output->previous_damage_region);
1337
1338         wlsc_matrix_init(&output->matrix);
1339         wlsc_matrix_translate(&output->matrix,
1340                               -output->x - output->width / 2.0,
1341                               -output->y - output->height / 2.0, 0);
1342
1343         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1344         wlsc_matrix_scale(&output->matrix,
1345                           2.0 / output->width,
1346                           flip * 2.0 / output->height, 1);
1347
1348         pixman_region32_union_rect(&c->damage_region,
1349                                    &c->damage_region,
1350                                    x, y, output->width, output->height);
1351 }
1352
1353 void
1354 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1355                  int x, int y, int width, int height, uint32_t flags)
1356 {
1357         output->compositor = c;
1358         output->x = x;
1359         output->y = y;
1360         output->width = width;
1361         output->height = height;
1362
1363         output->background =
1364                 background_create(output, option_background);
1365
1366         output->flags = flags;
1367         wlsc_output_move(output, x, y);
1368
1369         output->object.interface = &wl_output_interface;
1370         wl_display_add_object(c->wl_display, &output->object);
1371         wl_display_add_global(c->wl_display, &output->object,
1372                               wlsc_output_post_geometry);
1373 }
1374
1375 int
1376 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1377 {
1378         struct wl_event_loop *loop;
1379         const char *extensions;
1380
1381         ec->wl_display = display;
1382
1383         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1384
1385         wlsc_shm_init(ec);
1386         eglBindWaylandDisplayWL(ec->display, ec->wl_display);
1387
1388         wlsc_shell_init(ec);
1389
1390         wl_list_init(&ec->surface_list);
1391         wl_list_init(&ec->input_device_list);
1392         wl_list_init(&ec->output_list);
1393
1394         create_pointer_images(ec);
1395
1396         screenshooter_create(ec);
1397
1398         extensions = (const char *) glGetString(GL_EXTENSIONS);
1399         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1400                 fprintf(stderr,
1401                         "GL_EXT_texture_format_BGRA8888 not available\n");
1402                 return -1;
1403         }
1404
1405         glActiveTexture(GL_TEXTURE0);
1406         if (init_shaders(ec) < 0)
1407                 return -1;
1408
1409         loop = wl_display_get_event_loop(ec->wl_display);
1410         ec->timer_source = wl_event_loop_add_timer(loop, repaint, ec);
1411         pixman_region32_init(&ec->damage_region);
1412         wlsc_compositor_schedule_repaint(ec);
1413
1414         return 0;
1415 }
1416
1417 static void on_term_signal(int signal_number, void *data)
1418 {
1419         struct wlsc_compositor *ec = data;
1420
1421         wl_display_terminate(ec->wl_display);
1422 }
1423
1424 int main(int argc, char *argv[])
1425 {
1426         struct wl_display *display;
1427         struct wlsc_compositor *ec;
1428         struct wl_event_loop *loop;
1429         GError *error = NULL;
1430         GOptionContext *context;
1431         int width, height;
1432
1433         g_type_init(); /* GdkPixbuf needs this, it seems. */
1434
1435         context = g_option_context_new(NULL);
1436         g_option_context_add_main_entries(context, option_entries, "Wayland");
1437         if (!g_option_context_parse(context, &argc, &argv, &error)) {
1438                 fprintf(stderr, "option parsing failed: %s\n", error->message);
1439                 exit(EXIT_FAILURE);
1440         }
1441         if (sscanf(option_geometry, "%dx%d", &width, &height) != 2) {
1442                 fprintf(stderr, "invalid geometry option: %s \n",
1443                         option_geometry);
1444                 exit(EXIT_FAILURE);
1445         }
1446
1447         display = wl_display_create();
1448
1449         ec = NULL;
1450
1451 #if BUILD_WAYLAND_COMPOSITOR
1452         if (getenv("WAYLAND_DISPLAY"))
1453                 ec = wayland_compositor_create(display, width, height);
1454 #endif
1455
1456 #if BUILD_X11_COMPOSITOR
1457         if (ec == NULL && getenv("DISPLAY"))
1458                 ec = x11_compositor_create(display, width, height);
1459 #endif
1460
1461 #if BUILD_DRM_COMPOSITOR
1462         if (ec == NULL)
1463                 ec = drm_compositor_create(display, option_connector);
1464 #endif
1465
1466         if (ec == NULL) {
1467                 fprintf(stderr, "failed to create compositor\n");
1468                 exit(EXIT_FAILURE);
1469         }
1470
1471         if (wl_display_add_socket(display, option_socket_name)) {
1472                 fprintf(stderr, "failed to add socket: %m\n");
1473                 exit(EXIT_FAILURE);
1474         }
1475
1476         loop = wl_display_get_event_loop(ec->wl_display);
1477         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
1478         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
1479
1480         wl_display_run(display);
1481
1482         eglUnbindWaylandDisplayWL(ec->display, display);
1483         wl_display_destroy(display);
1484
1485         ec->destroy(ec);
1486
1487         return 0;
1488 }