compositor/compositor.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <stdint.h>
  27 #include <limits.h>
  28 #include <stdarg.h>
  29 #include <assert.h>
  30 #include <sys/ioctl.h>
  31 #include <fcntl.h>
  32 #include <unistd.h>
  33 #include <math.h>
  34 #include <linux/input.h>
  35 #include <dlfcn.h>
  36 #include <getopt.h>
  37 #include <signal.h>
  38
  39 #include "wayland-server.h"
  40 #include "compositor.h"
  41
  42 /* The plan here is to generate a random anonymous socket name and
  43  * advertise that through a service on the session dbus.
  44  */
  45 static const char *option_socket_name = NULL;
  46 static const char *option_background = "background.jpg";
  47 static int option_idle_time = 300;
  48
  49 WL_EXPORT void
  50 wlsc_matrix_init(struct wlsc_matrix *matrix)
  51 {
  52         static const struct wlsc_matrix identity = {
  53                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  54         };
  55
  56         memcpy(matrix, &identity, sizeof identity);
  57 }
  58
  59 static void
  60 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  61 {
  62         struct wlsc_matrix tmp;
  63         const GLfloat *row, *column;
  64         div_t d;
  65         int i, j;
  66
  67         for (i = 0; i < 16; i++) {
  68                 tmp.d[i] = 0;
  69                 d = div(i, 4);
  70                 row = m->d + d.quot * 4;
  71                 column = n->d + d.rem;
  72                 for (j = 0; j < 4; j++)
  73                         tmp.d[i] += row[j] * column[j * 4];
  74         }
  75         memcpy(m, &tmp, sizeof tmp);
  76 }
  77
  78 WL_EXPORT void
  79 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  80 {
  81         struct wlsc_matrix translate = {
  82                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
  83         };
  84
  85         wlsc_matrix_multiply(matrix, &translate);
  86 }
  87
  88 WL_EXPORT void
  89 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  90 {
  91         struct wlsc_matrix scale = {
  92                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
  93         };
  94
  95         wlsc_matrix_multiply(matrix, &scale);
  96 }
  97
  98 static void
  99 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 100 {
 101         int i, j;
 102         struct wlsc_vector t;
 103
 104         for (i = 0; i < 4; i++) {
 105                 t.f[i] = 0;
 106                 for (j = 0; j < 4; j++)
 107                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 108         }
 109
 110         *v = t;
 111 }
 112
 113 WL_EXPORT void
 114 wlsc_spring_init(struct wlsc_spring *spring,
 115                  double k, double current, double target)
 116 {
 117         spring->k = k;
 118         spring->friction = 100.0;
 119         spring->current = current;
 120         spring->previous = current;
 121         spring->target = target;
 122 }
 123
 124 WL_EXPORT void
 125 wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec)
 126 {
 127         double force, v, current, step;
 128
 129         step = (msec - spring->timestamp) / 300.0;
 130         spring->timestamp = msec;
 131
 132         current = spring->current;
 133         v = current - spring->previous;
 134         force = spring->k * (spring->target - current) / 10.0 +
 135                 (spring->previous - current) - v * spring->friction;
 136
 137         spring->current =
 138                 current + (current - spring->previous) + force * step * step;
 139         spring->previous = current;
 140
 141 #if 0
 142         if (spring->current >= 1.0) {
 143 #ifdef TWEENER_BOUNCE
 144                 spring->current = 2.0 - spring->current;
 145                 spring->previous = 2.0 - spring->previous;
 146 #else
 147                 spring->current = 1.0;
 148                 spring->previous = 1.0;
 149 #endif
 150         }
 151
 152         if (spring->current <= 0.0) {
 153                 spring->current = 0.0;
 154                 spring->previous = 0.0;
 155         }
 156 #endif
 157 }
 158
 159 WL_EXPORT int
 160 wlsc_spring_done(struct wlsc_spring *spring)
 161 {
 162         return fabs(spring->previous - spring->target) < 0.0002 &&
 163                 fabs(spring->current - spring->target) < 0.0002;
 164 }
 165
 166 static void
 167 surface_handle_buffer_destroy(struct wl_listener *listener,
 168                               struct wl_resource *resource, uint32_t time)
 169 {
 170         struct wlsc_surface *es = container_of(listener, struct wlsc_surface,
 171                                                buffer_destroy_listener);
 172         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 173
 174         if (es->buffer == buffer)
 175                 es->buffer = NULL;
 176 }
 177
 178 static void
 179 output_handle_scanout_buffer_destroy(struct wl_listener *listener,
 180                                      struct wl_resource *resource,
 181                                      uint32_t time)
 182 {
 183         struct wlsc_output *output =
 184                 container_of(listener, struct wlsc_output,
 185                              scanout_buffer_destroy_listener);
 186         struct wl_buffer *buffer = (struct wl_buffer *) resource;
 187
 188         if (output->scanout_buffer == buffer)
 189                 output->scanout_buffer = NULL;
 190 }
 191
 192 WL_EXPORT struct wlsc_surface *
 193 wlsc_surface_create(struct wlsc_compositor *compositor,
 194                     int32_t x, int32_t y, int32_t width, int32_t height)
 195 {
 196         struct wlsc_surface *surface;
 197
 198         surface = malloc(sizeof *surface);
 199         if (surface == NULL)
 200                 return NULL;
 201
 202         wl_list_init(&surface->link);
 203         wl_list_init(&surface->buffer_link);
 204         surface->map_type = WLSC_SURFACE_MAP_UNMAPPED;
 205
 206         glGenTextures(1, &surface->texture);
 207         glBindTexture(GL_TEXTURE_2D, surface->texture);
 208         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 209         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 210
 211         surface->compositor = compositor;
 212         surface->visual = NULL;
 213         surface->image = EGL_NO_IMAGE_KHR;
 214         surface->saved_texture = 0;
 215         surface->x = x;
 216         surface->y = y;
 217         surface->width = width;
 218         surface->height = height;
 219
 220         surface->buffer = NULL;
 221
 222         surface->buffer_destroy_listener.func = surface_handle_buffer_destroy;
 223         wl_list_init(&surface->buffer_destroy_listener.link);
 224
 225         surface->transform = NULL;
 226
 227         return surface;
 228 }
 229
 230 WL_EXPORT void
 231 wlsc_surface_damage_rectangle(struct wlsc_surface *surface,
 232                               int32_t x, int32_t y,
 233                               int32_t width, int32_t height)
 234 {
 235         struct wlsc_compositor *compositor = surface->compositor;
 236
 237         pixman_region32_union_rect(&compositor->damage_region,
 238                                    &compositor->damage_region,
 239                                    surface->x + x, surface->y + y,
 240                                    width, height);
 241         wlsc_compositor_schedule_repaint(compositor);
 242 }
 243
 244 WL_EXPORT void
 245 wlsc_surface_damage(struct wlsc_surface *surface)
 246 {
 247         wlsc_surface_damage_rectangle(surface, 0, 0,
 248                                       surface->width, surface->height);
 249 }
 250
 251 WL_EXPORT uint32_t
 252 wlsc_compositor_get_time(void)
 253 {
 254         struct timeval tv;
 255
 256         gettimeofday(&tv, NULL);
 257
 258         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 259 }
 260
 261 static void
 262 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 263 {
 264         struct wlsc_surface *surface =
 265                 container_of(resource, struct wlsc_surface, surface.resource);
 266         struct wlsc_compositor *compositor = surface->compositor;
 267
 268         wlsc_surface_damage(surface);
 269
 270         wl_list_remove(&surface->link);
 271         if (surface->saved_texture == 0)
 272                 glDeleteTextures(1, &surface->texture);
 273         else
 274                 glDeleteTextures(1, &surface->saved_texture);
 275
 276         if (surface->buffer)
 277                 wl_list_remove(&surface->buffer_destroy_listener.link);
 278
 279         if (surface->image != EGL_NO_IMAGE_KHR)
 280                 compositor->destroy_image(compositor->display,
 281                                           surface->image);
 282
 283         wl_list_remove(&surface->buffer_link);
 284
 285         free(surface);
 286 }
 287
 288 static void
 289 wlsc_buffer_attach(struct wl_buffer *buffer, struct wl_surface *surface)
 290 {
 291         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 292         struct wlsc_compositor *ec = es->compositor;
 293         struct wl_list *surfaces_attached_to;
 294
 295         if (es->saved_texture != 0)
 296                 es->texture = es->saved_texture;
 297
 298         glBindTexture(GL_TEXTURE_2D, es->texture);
 299
 300         if (wl_buffer_is_shm(buffer)) {
 301                 /* Unbind any EGLImage texture that may be bound, so we don't
 302                  * overwrite it.*/
 303                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 304                              0, 0, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, NULL);
 305                 es->pitch = wl_shm_buffer_get_stride(buffer) / 4;
 306                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 307                              es->pitch, buffer->height, 0,
 308                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 309                              wl_shm_buffer_get_data(buffer));
 310                 es->visual = buffer->visual;
 311
 312                 surfaces_attached_to = buffer->user_data;
 313
 314                 wl_list_remove(&es->buffer_link);
 315                 wl_list_insert(surfaces_attached_to, &es->buffer_link);
 316         } else {
 317                 if (es->image != EGL_NO_IMAGE_KHR)
 318                         ec->destroy_image(ec->display, es->image);
 319                 es->image = ec->create_image(ec->display, NULL,
 320                                              EGL_WAYLAND_BUFFER_WL,
 321                                              buffer, NULL);
 322
 323                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 324                 es->visual = buffer->visual;
 325                 es->pitch = es->width;
 326         }
 327 }
 328
 329 static void
 330 wlsc_sprite_attach(struct wlsc_sprite *sprite, struct wl_surface *surface)
 331 {
 332         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 333         struct wlsc_compositor *ec = es->compositor;
 334
 335         es->pitch = es->width;
 336         es->image = sprite->image;
 337         if (sprite->image != EGL_NO_IMAGE_KHR) {
 338                 glBindTexture(GL_TEXTURE_2D, es->texture);
 339                 ec->image_target_texture_2d(GL_TEXTURE_2D, es->image);
 340         } else {
 341                 if (es->saved_texture == 0)
 342                         es->saved_texture = es->texture;
 343                 es->texture = sprite->texture;
 344         }
 345
 346         es->visual = sprite->visual;
 347
 348         if (es->buffer)
 349                 es->buffer = NULL;
 350 }
 351
 352 enum sprite_usage {
 353         SPRITE_USE_CURSOR = (1 << 0),
 354 };
 355
 356 static struct wlsc_sprite *
 357 create_sprite_from_png(struct wlsc_compositor *ec,
 358                        const char *filename, uint32_t usage)
 359 {
 360         uint32_t *pixels;
 361         struct wlsc_sprite *sprite;
 362         int32_t width, height;
 363         uint32_t stride;
 364
 365         pixels = wlsc_load_image(filename, &width, &height, &stride);
 366         if (pixels == NULL)
 367                 return NULL;
 368
 369         sprite = malloc(sizeof *sprite);
 370         if (sprite == NULL) {
 371                 free(pixels);
 372                 return NULL;
 373         }
 374
 375         sprite->visual = &ec->compositor.premultiplied_argb_visual;
 376         sprite->width = width;
 377         sprite->height = height;
 378         sprite->image = EGL_NO_IMAGE_KHR;
 379
 380         if (usage & SPRITE_USE_CURSOR && ec->create_cursor_image != NULL)
 381                 sprite->image = ec->create_cursor_image(ec, width, height);
 382
 383         glGenTextures(1, &sprite->texture);
 384         glBindTexture(GL_TEXTURE_2D, sprite->texture);
 385         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 386         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 387         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 388         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 389
 390         if (sprite->image != EGL_NO_IMAGE_KHR) {
 391                 ec->image_target_texture_2d(GL_TEXTURE_2D, sprite->image);
 392                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
 393                                 GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 394         } else {
 395                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, width, height, 0,
 396                              GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
 397         }
 398
 399         free(pixels);
 400
 401         return sprite;
 402 }
 403
 404 static const struct {
 405         const char *filename;
 406         int hotspot_x, hotspot_y;
 407 } pointer_images[] = {
 408         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 409         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 410         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 411         { DATADIR "/wayland/grabbing.png",              20, 17 },
 412         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 413         { DATADIR "/wayland/left_side.png",             10, 20 },
 414         { DATADIR "/wayland/right_side.png",            30, 19 },
 415         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 416         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 417         { DATADIR "/wayland/top_side.png",              18,  8 },
 418         { DATADIR "/wayland/xterm.png",                 15, 15 }
 419 };
 420
 421 static void
 422 create_pointer_images(struct wlsc_compositor *ec)
 423 {
 424         int i, count;
 425
 426         count = ARRAY_LENGTH(pointer_images);
 427         ec->pointer_sprites = malloc(count * sizeof *ec->pointer_sprites);
 428         for (i = 0; i < count; i++) {
 429                 ec->pointer_sprites[i] =
 430                         create_sprite_from_png(ec,
 431                                                pointer_images[i].filename,
 432                                                SPRITE_USE_CURSOR);
 433         }
 434 }
 435
 436 static struct wlsc_surface *
 437 background_create(struct wlsc_output *output, const char *filename)
 438 {
 439         struct wlsc_surface *background;
 440         struct wlsc_sprite *sprite;
 441
 442         background = wlsc_surface_create(output->compositor,
 443                                          output->x, output->y,
 444                                          output->current->width,
 445                                          output->current->height);
 446         if (background == NULL)
 447                 return NULL;
 448
 449         sprite = create_sprite_from_png(output->compositor, filename, 0);
 450         if (sprite == NULL) {
 451                 free(background);
 452                 return NULL;
 453         }
 454
 455         wlsc_sprite_attach(sprite, &background->surface);
 456
 457         return background;
 458 }
 459
 460 static int
 461 texture_region(struct wlsc_surface *es, pixman_region32_t *region)
 462 {
 463         struct wlsc_compositor *ec = es->compositor;
 464         GLfloat *v, inv_width, inv_height;
 465         pixman_box32_t *rectangles;
 466         unsigned int *p;
 467         int i, n;
 468
 469         rectangles = pixman_region32_rectangles(region, &n);
 470         v = wl_array_add(&ec->vertices, n * 16 * sizeof *v);
 471         p = wl_array_add(&ec->indices, n * 6 * sizeof *p);
 472         inv_width = 1.0 / es->pitch;
 473         inv_height = 1.0 / es->height;
 474
 475         for (i = 0; i < n; i++, v += 16, p += 6) {
 476                 v[ 0] = rectangles[i].x1;
 477                 v[ 1] = rectangles[i].y1;
 478                 v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width;
 479                 v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height;
 480
 481                 v[ 4] = rectangles[i].x1;
 482                 v[ 5] = rectangles[i].y2;
 483                 v[ 6] = v[ 2];
 484                 v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height;
 485
 486                 v[ 8] = rectangles[i].x2;
 487                 v[ 9] = rectangles[i].y1;
 488                 v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width;
 489                 v[11] = v[ 3];
 490
 491                 v[12] = rectangles[i].x2;
 492                 v[13] = rectangles[i].y2;
 493                 v[14] = v[10];
 494                 v[15] = v[ 7];
 495
 496                 p[0] = i * 4 + 0;
 497                 p[1] = i * 4 + 1;
 498                 p[2] = i * 4 + 2;
 499                 p[3] = i * 4 + 2;
 500                 p[4] = i * 4 + 1;
 501                 p[5] = i * 4 + 3;
 502         }
 503
 504         return n;
 505 }
 506
 507 static void
 508 transform_vertex(struct wlsc_surface *surface,
 509                  GLfloat x, GLfloat y, GLfloat u, GLfloat v, GLfloat *r)
 510 {
 511         struct wlsc_vector t;
 512
 513         t.f[0] = x;
 514         t.f[1] = y;
 515         t.f[2] = 0.0;
 516         t.f[3] = 1.0;
 517
 518         wlsc_matrix_transform(&surface->transform->matrix, &t);
 519
 520         r[ 0] = t.f[0];
 521         r[ 1] = t.f[1];
 522         r[ 2] = u;
 523         r[ 3] = v;
 524 }
 525
 526 static int
 527 texture_transformed_surface(struct wlsc_surface *es)
 528 {
 529         struct wlsc_compositor *ec = es->compositor;
 530         GLfloat *v;
 531         unsigned int *p;
 532
 533         v = wl_array_add(&ec->vertices, 16 * sizeof *v);
 534         p = wl_array_add(&ec->indices, 6 * sizeof *p);
 535
 536         transform_vertex(es, es->x, es->y, 0.0, 0.0, &v[0]);
 537         transform_vertex(es, es->x, es->y + es->height, 0.0, 1.0, &v[4]);
 538         transform_vertex(es, es->x + es->width, es->y, 1.0, 0.0, &v[8]);
 539         transform_vertex(es, es->x + es->width, es->y + es->height,
 540                          1.0, 1.0, &v[12]);
 541
 542         p[0] = 0;
 543         p[1] = 1;
 544         p[2] = 2;
 545         p[3] = 2;
 546         p[4] = 1;
 547         p[5] = 3;
 548
 549         return 1;
 550 }
 551
 552 static void
 553 wlsc_surface_draw(struct wlsc_surface *es,
 554                   struct wlsc_output *output, pixman_region32_t *clip)
 555 {
 556         struct wlsc_compositor *ec = es->compositor;
 557         GLfloat *v;
 558         pixman_region32_t repaint;
 559         GLint filter;
 560         int n;
 561
 562         pixman_region32_init_rect(&repaint,
 563                                   es->x, es->y, es->width, es->height);
 564         pixman_region32_intersect(&repaint, &repaint, clip);
 565         if (!pixman_region32_not_empty(&repaint))
 566                 return;
 567
 568         if (es->visual == &ec->compositor.argb_visual) {
 569                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 570                 glEnable(GL_BLEND);
 571         } else if (es->visual == &ec->compositor.premultiplied_argb_visual) {
 572                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 573                 glEnable(GL_BLEND);
 574         } else {
 575                 glDisable(GL_BLEND);
 576         }
 577
 578         if (es->transform == NULL) {
 579                 filter = GL_NEAREST;
 580                 n = texture_region(es, &repaint);
 581         } else {
 582                 filter = GL_LINEAR;
 583                 n = texture_transformed_surface(es);
 584         }
 585
 586         glBindTexture(GL_TEXTURE_2D, es->texture);
 587         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 588         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
 589
 590         v = ec->vertices.data;
 591         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 592         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 593         glEnableVertexAttribArray(0);
 594         glEnableVertexAttribArray(1);
 595         glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data);
 596
 597         ec->vertices.size = 0;
 598         ec->indices.size = 0;
 599         pixman_region32_fini(&repaint);
 600 }
 601
 602 static void
 603 wlsc_surface_raise(struct wlsc_surface *surface)
 604 {
 605         struct wlsc_compositor *compositor = surface->compositor;
 606
 607         wl_list_remove(&surface->link);
 608         wl_list_insert(&compositor->surface_list, &surface->link);
 609 }
 610
 611 WL_EXPORT void
 612 wlsc_compositor_damage_all(struct wlsc_compositor *compositor)
 613 {
 614         struct wlsc_output *output;
 615
 616         wl_list_for_each(output, &compositor->output_list, link)
 617                 wlsc_output_damage(output);
 618 }
 619
 620 static inline void
 621 wlsc_buffer_post_release(struct wl_buffer *buffer)
 622 {
 623         if (buffer == NULL || --buffer->busy_count > 0)
 624                 return;
 625
 626         assert(buffer->client != NULL);
 627         wl_client_post_event(buffer->client,
 628                              &buffer->resource.object,
 629                              WL_BUFFER_RELEASE);
 630 }
 631
 632 WL_EXPORT void
 633 wlsc_output_damage(struct wlsc_output *output)
 634 {
 635         struct wlsc_compositor *compositor = output->compositor;
 636
 637         pixman_region32_union(&compositor->damage_region,
 638                               &compositor->damage_region, &output->region);
 639         wlsc_compositor_schedule_repaint(compositor);
 640 }
 641
 642 static void
 643 fade_frame(struct wlsc_animation *animation,
 644            struct wlsc_output *output, uint32_t msecs)
 645 {
 646         struct wlsc_compositor *compositor =
 647                 container_of(animation,
 648                              struct wlsc_compositor, fade.animation);
 649
 650         wlsc_spring_update(&compositor->fade.spring, msecs);
 651         if (wlsc_spring_done(&compositor->fade.spring)) {
 652                 if (compositor->fade.spring.current > 0.999) {
 653                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 654                         compositor->shell->lock(compositor->shell);
 655                 }
 656                 compositor->fade.spring.current =
 657                         compositor->fade.spring.target;
 658                 wl_list_remove(&animation->link);
 659                 wl_list_init(&animation->link);
 660         }
 661
 662         wlsc_output_damage(output);
 663 }
 664
 665 static void
 666 fade_output(struct wlsc_output *output,
 667             GLfloat tint, pixman_region32_t *region)
 668 {
 669         struct wlsc_compositor *compositor = output->compositor;
 670         struct wlsc_surface surface;
 671         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 672
 673         surface.compositor = compositor;
 674         surface.x = output->x;
 675         surface.y = output->y;
 676         surface.width = output->current->width;
 677         surface.height = output->current->height;
 678         surface.texture = GL_NONE;
 679         surface.transform = NULL;
 680
 681         if (tint <= 1.0)
 682                 surface.visual =
 683                         &compositor->compositor.premultiplied_argb_visual;
 684         else
 685                 surface.visual = &compositor->compositor.rgb_visual;
 686
 687         glUseProgram(compositor->solid_shader.program);
 688         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 689                            1, GL_FALSE, output->matrix.d);
 690         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 691         wlsc_surface_draw(&surface, output, region);
 692 }
 693
 694 static void
 695 wlsc_output_repaint(struct wlsc_output *output)
 696 {
 697         struct wlsc_compositor *ec = output->compositor;
 698         struct wlsc_surface *es;
 699         struct wlsc_input_device *eid, *hw_cursor;
 700         pixman_region32_t new_damage, total_damage;
 701
 702         output->prepare_render(output);
 703
 704         glViewport(0, 0, output->current->width, output->current->height);
 705
 706         glUseProgram(ec->texture_shader.program);
 707         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 708                            1, GL_FALSE, output->matrix.d);
 709         glUniform1i(ec->texture_shader.tex_uniform, 0);
 710
 711         pixman_region32_init(&new_damage);
 712         pixman_region32_init(&total_damage);
 713         pixman_region32_intersect(&new_damage,
 714                                   &ec->damage_region, &output->region);
 715         pixman_region32_subtract(&ec->damage_region,
 716                                  &ec->damage_region, &new_damage);
 717         pixman_region32_union(&total_damage, &new_damage,
 718                               &output->previous_damage_region);
 719         pixman_region32_copy(&output->previous_damage_region, &new_damage);
 720
 721         hw_cursor = NULL;
 722         if (ec->focus && ec->fade.spring.current < 0.001) {
 723                 hw_cursor = (struct wlsc_input_device *) ec->input_device;
 724                 if (output->set_hardware_cursor(output, hw_cursor) < 0)
 725                         hw_cursor = NULL;
 726         } else {
 727                 output->set_hardware_cursor(output, NULL);
 728         }
 729
 730         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 731
 732         if (es->visual == &ec->compositor.rgb_visual && hw_cursor) {
 733                 if (output->prepare_scanout_surface(output, es) == 0) {
 734                         /* We're drawing nothing now,
 735                          * draw the damaged regions later. */
 736                         pixman_region32_union(&ec->damage_region,
 737                                               &ec->damage_region,
 738                                               &total_damage);
 739
 740                         output->scanout_buffer = es->buffer;
 741                         output->scanout_buffer->busy_count++;
 742
 743                         wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 744                         wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 745                                        &output->scanout_buffer_destroy_listener.link);
 746
 747                         return;
 748                 }
 749         }
 750
 751         if (es->fullscreen_output == output) {
 752                 if (es->width < output->current->width ||
 753                     es->height < output->current->height)
 754                         glClear(GL_COLOR_BUFFER_BIT);
 755                 wlsc_surface_draw(es, output, &total_damage);
 756         } else {
 757                 if (output->background)
 758                         wlsc_surface_draw(output->background,
 759                                           output, &total_damage);
 760                 else
 761                         fade_output(output, 1.0, &total_damage);
 762
 763                 glUseProgram(ec->texture_shader.program);
 764                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 765                         if (ec->overlay == es)
 766                                 continue;
 767
 768                         wlsc_surface_draw(es, output, &total_damage);
 769                 }
 770         }
 771
 772         if (ec->overlay)
 773                 wlsc_surface_draw(ec->overlay, output, &total_damage);
 774
 775         if (ec->focus)
 776                 wl_list_for_each(eid, &ec->input_device_list, link) {
 777                         if (&eid->input_device != ec->input_device ||
 778                             eid != hw_cursor)
 779                                 wlsc_surface_draw(eid->sprite, output,
 780                                                   &total_damage);
 781                 }
 782
 783         if (ec->fade.spring.current > 0.001)
 784                 fade_output(output, ec->fade.spring.current, &total_damage);
 785 }
 786
 787 static void
 788 repaint(void *data, int msecs)
 789 {
 790         struct wlsc_output *output = data;
 791         struct wlsc_compositor *compositor = output->compositor;
 792         struct wlsc_surface *es;
 793         struct wlsc_animation *animation, *next;
 794
 795         wlsc_output_repaint(output);
 796         output->repaint_needed = 0;
 797         output->repaint_scheduled = 1;
 798         output->present(output);
 799
 800         /* FIXME: Keep the surfaces in an per-output list. */
 801         wl_list_for_each(es, &compositor->surface_list, link) {
 802                 if (es->output == output) {
 803                         wl_display_post_frame(compositor->wl_display,
 804                                               &es->surface, msecs);
 805                 }
 806         }
 807
 808         wl_list_for_each_safe(animation, next,
 809                               &compositor->animation_list, link)
 810                 animation->frame(animation, output, msecs);
 811 }
 812
 813 static void
 814 idle_repaint(void *data)
 815 {
 816         repaint(data, wlsc_compositor_get_time());
 817 }
 818
 819 WL_EXPORT void
 820 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 821 {
 822         wlsc_buffer_post_release(output->scanout_buffer);
 823         output->scanout_buffer = NULL;
 824         output->repaint_scheduled = 0;
 825
 826         if (output->repaint_needed)
 827                 repaint(output, msecs);
 828 }
 829
 830 WL_EXPORT void
 831 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 832 {
 833         struct wlsc_output *output;
 834         struct wl_event_loop *loop;
 835
 836         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 837                 return;
 838
 839         loop = wl_display_get_event_loop(compositor->wl_display);
 840         wl_list_for_each(output, &compositor->output_list, link) {
 841                 output->repaint_needed = 1;
 842                 if (output->repaint_scheduled)
 843                         continue;
 844
 845                 wl_event_loop_add_idle(loop, idle_repaint, output);
 846                 output->repaint_scheduled = 1;
 847         }
 848 }
 849
 850 WL_EXPORT void
 851 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 852 {
 853         int done;
 854
 855         done = wlsc_spring_done(&compositor->fade.spring);
 856         compositor->fade.spring.target = tint;
 857         if (wlsc_spring_done(&compositor->fade.spring))
 858                 return;
 859
 860         if (done)
 861                 compositor->fade.spring.timestamp =
 862                         wlsc_compositor_get_time();
 863
 864         wlsc_compositor_damage_all(compositor);
 865         if (wl_list_empty(&compositor->fade.animation.link))
 866                 wl_list_insert(compositor->animation_list.prev,
 867                                &compositor->fade.animation.link);
 868 }
 869
 870 static void
 871 surface_destroy(struct wl_client *client,
 872                 struct wl_surface *surface)
 873 {
 874         wl_resource_destroy(&surface->resource, client,
 875                             wlsc_compositor_get_time());
 876 }
 877
 878 WL_EXPORT void
 879 wlsc_surface_assign_output(struct wlsc_surface *es)
 880 {
 881         struct wlsc_compositor *ec = es->compositor;
 882         struct wlsc_output *output;
 883
 884         struct wlsc_output *tmp = es->output;
 885         es->output = NULL;
 886
 887         wl_list_for_each(output, &ec->output_list, link) {
 888                 if (pixman_region32_contains_point(&output->region,
 889                                                    es->x, es->y, NULL)) {
 890                         if (output != tmp)
 891                                 printf("assiging surface %p to output %p\n",
 892                                        es, output);
 893                         es->output = output;
 894                 }
 895         }
 896
 897         if (es->output == NULL) {
 898                 printf("no output found\n");
 899                 es->output = container_of(ec->output_list.next,
 900                                           struct wlsc_output, link);
 901         }
 902 }
 903
 904 static void
 905 surface_attach(struct wl_client *client,
 906                struct wl_surface *surface, struct wl_buffer *buffer,
 907                int32_t x, int32_t y)
 908 {
 909         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 910
 911         buffer->busy_count++;
 912         wlsc_buffer_post_release(es->buffer);
 913
 914         es->buffer = buffer;
 915         wl_list_remove(&es->buffer_destroy_listener.link);
 916         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 917                        &es->buffer_destroy_listener.link);
 918
 919         es->x += x;
 920         es->y += y;
 921         es->width = buffer->width;
 922         es->height = buffer->height;
 923         if (x != 0 || y != 0)
 924                 wlsc_surface_assign_output(es);
 925         if (es->visual == NULL)
 926                 wl_list_insert(&es->compositor->surface_list, &es->link);
 927
 928         wlsc_buffer_attach(buffer, surface);
 929
 930         /* FIXME: This damages the entire old surface, but we should
 931          * really just damage the part that's no longer covered by the
 932          * surface.  Anything covered by the new surface will be
 933          * damaged by the client. */
 934         wlsc_surface_damage(es);
 935
 936         es->compositor->shell->attach(es->compositor->shell, es);
 937 }
 938
 939 static void
 940 surface_damage(struct wl_client *client,
 941                struct wl_surface *surface,
 942                int32_t x, int32_t y, int32_t width, int32_t height)
 943 {
 944         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 945
 946         wlsc_surface_damage_rectangle(es, x, y, width, height);
 947 }
 948
 949 const static struct wl_surface_interface surface_interface = {
 950         surface_destroy,
 951         surface_attach,
 952         surface_damage
 953 };
 954
 955 static void
 956 wlsc_input_device_attach(struct wlsc_input_device *device,
 957                          int x, int y, int width, int height)
 958 {
 959         wlsc_surface_damage(device->sprite);
 960
 961         device->hotspot_x = x;
 962         device->hotspot_y = y;
 963
 964         device->sprite->x = device->input_device.x - device->hotspot_x;
 965         device->sprite->y = device->input_device.y - device->hotspot_y;
 966         device->sprite->width = width;
 967         device->sprite->height = height;
 968
 969         wlsc_surface_damage(device->sprite);
 970 }
 971
 972 static void
 973 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
 974                                 struct wl_buffer *buffer, int x, int y)
 975 {
 976         wlsc_buffer_attach(buffer, &device->sprite->surface);
 977         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
 978 }
 979
 980 static void
 981 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
 982                                 struct wlsc_sprite *sprite, int x, int y)
 983 {
 984         wlsc_sprite_attach(sprite, &device->sprite->surface);
 985         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
 986 }
 987
 988 WL_EXPORT void
 989 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 990                                     enum wlsc_pointer_type type)
 991 {
 992         struct wlsc_compositor *compositor =
 993                 (struct wlsc_compositor *) device->input_device.compositor;
 994
 995         wlsc_input_device_attach_sprite(device,
 996                                         compositor->pointer_sprites[type],
 997                                         pointer_images[type].hotspot_x,
 998                                         pointer_images[type].hotspot_y);
 999 }
1000
1001 static void
1002 compositor_create_surface(struct wl_client *client,
1003                           struct wl_compositor *compositor, uint32_t id)
1004 {
1005         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1006         struct wlsc_surface *surface;
1007
1008         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1009         if (surface == NULL) {
1010                 wl_client_post_no_memory(client);
1011                 return;
1012         }
1013
1014         surface->surface.resource.destroy = destroy_surface;
1015
1016         surface->surface.resource.object.id = id;
1017         surface->surface.resource.object.interface = &wl_surface_interface;
1018         surface->surface.resource.object.implementation =
1019                 (void (**)(void)) &surface_interface;
1020         surface->surface.client = client;
1021
1022         wl_client_add_resource(client, &surface->surface.resource);
1023 }
1024
1025 const static struct wl_compositor_interface compositor_interface = {
1026         compositor_create_surface,
1027 };
1028
1029 static void
1030 wlsc_surface_transform(struct wlsc_surface *surface,
1031                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1032 {
1033         *sx = x - surface->x;
1034         *sy = y - surface->y;
1035 }
1036
1037 WL_EXPORT struct wlsc_surface *
1038 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1039 {
1040         struct wlsc_compositor *ec =
1041                 (struct wlsc_compositor *) device->compositor;
1042         struct wlsc_surface *es;
1043
1044         wl_list_for_each(es, &ec->surface_list, link) {
1045                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1046                 if (0 <= *sx && *sx < es->width &&
1047                     0 <= *sy && *sy < es->height)
1048                         return es;
1049         }
1050
1051         return NULL;
1052 }
1053
1054
1055 static void
1056 motion_grab_motion(struct wl_grab *grab,
1057                    uint32_t time, int32_t x, int32_t y)
1058 {
1059         struct wlsc_input_device *device =
1060                 (struct wlsc_input_device *) grab->input_device;
1061         struct wlsc_surface *es =
1062                 (struct wlsc_surface *) device->input_device.pointer_focus;
1063         int32_t sx, sy;
1064
1065         wlsc_surface_transform(es, x, y, &sx, &sy);
1066         wl_client_post_event(es->surface.client,
1067                              &device->input_device.object,
1068                              WL_INPUT_DEVICE_MOTION,
1069                              time, x, y, sx, sy);
1070 }
1071
1072 static void
1073 motion_grab_button(struct wl_grab *grab,
1074                    uint32_t time, int32_t button, int32_t state)
1075 {
1076         wl_client_post_event(grab->input_device->pointer_focus->client,
1077                              &grab->input_device->object,
1078                              WL_INPUT_DEVICE_BUTTON,
1079                              time, button, state);
1080 }
1081
1082 static void
1083 motion_grab_end(struct wl_grab *grab, uint32_t time)
1084 {
1085 }
1086
1087 static const struct wl_grab_interface motion_grab_interface = {
1088         motion_grab_motion,
1089         motion_grab_button,
1090         motion_grab_end
1091 };
1092
1093 WL_EXPORT void
1094 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1095 {
1096         if (compositor->idle_inhibit)
1097                 return;
1098
1099         wlsc_compositor_fade(compositor, 0.0);
1100         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1101
1102         wl_event_source_timer_update(compositor->idle_source,
1103                                      option_idle_time * 1000);
1104 }
1105
1106 static void
1107 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1108 {
1109         wlsc_compositor_wake(compositor);
1110         compositor->idle_inhibit++;
1111 }
1112
1113 static void
1114 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1115 {
1116         compositor->idle_inhibit--;
1117         wlsc_compositor_wake(compositor);
1118 }
1119
1120 static int
1121 idle_handler(void *data)
1122 {
1123         struct wlsc_compositor *compositor = data;
1124
1125         if (compositor->idle_inhibit)
1126                 return 1;
1127
1128         wlsc_compositor_fade(compositor, 1.0);
1129
1130         return 1;
1131 }
1132
1133 WL_EXPORT void
1134 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1135 {
1136         struct wlsc_surface *es;
1137         struct wlsc_compositor *ec =
1138                 (struct wlsc_compositor *) device->compositor;
1139         struct wlsc_output *output;
1140         const struct wl_grab_interface *interface;
1141         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1142         int32_t sx, sy;
1143         int x_valid = 0, y_valid = 0;
1144         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1145
1146         wlsc_compositor_wake(ec);
1147
1148         wl_list_for_each(output, &ec->output_list, link) {
1149                 if (output->x <= x && x <= output->x + output->current->width)
1150                         x_valid = 1;
1151
1152                 if (output->y <= y && y <= output->y + output->current->height)
1153                         y_valid = 1;
1154
1155                 /* FIXME: calculate this only on output addition/deletion */
1156                 if (output->x < min_x)
1157                         min_x = output->x;
1158                 if (output->y < min_y)
1159                         min_y = output->y;
1160
1161                 if (output->x + output->current->width > max_x)
1162                         max_x = output->x + output->current->width;
1163                 if (output->y + output->current->height > max_y)
1164                         max_y = output->y + output->current->height;
1165         }
1166
1167         if (!x_valid) {
1168                 if (x < min_x)
1169                         x = min_x;
1170                 else if (x >= max_x)
1171                         x = max_x;
1172         }
1173         if (!y_valid) {
1174                 if (y < min_y)
1175                         y = min_y;
1176                 else  if (y >= max_y)
1177                         y = max_y;
1178         }
1179
1180         device->x = x;
1181         device->y = y;
1182
1183         if (device->grab) {
1184                 interface = device->grab->interface;
1185                 interface->motion(device->grab, time, x, y);
1186         } else {
1187                 es = pick_surface(device, &sx, &sy);
1188                 wl_input_device_set_pointer_focus(device,
1189                                                   &es->surface,
1190                                                   time, x, y, sx, sy);
1191                 if (es)
1192                         wl_client_post_event(es->surface.client,
1193                                              &device->object,
1194                                              WL_INPUT_DEVICE_MOTION,
1195                                              time, x, y, sx, sy);
1196         }
1197
1198         wlsc_surface_damage(wd->sprite);
1199
1200         wd->sprite->x = device->x - wd->hotspot_x;
1201         wd->sprite->y = device->y - wd->hotspot_y;
1202
1203         wlsc_surface_damage(wd->sprite);
1204 }
1205
1206 WL_EXPORT void
1207 wlsc_surface_activate(struct wlsc_surface *surface,
1208                       struct wlsc_input_device *device, uint32_t time)
1209 {
1210         struct wlsc_shell *shell = surface->compositor->shell;
1211
1212         wlsc_surface_raise(surface);
1213         if (device->selection)
1214                 shell->set_selection_focus(shell,
1215                                            device->selection,
1216                                            &surface->surface, time);
1217
1218         wl_input_device_set_keyboard_focus(&device->input_device,
1219                                            &surface->surface,
1220                                            time);
1221 }
1222
1223 struct wlsc_binding {
1224         uint32_t key;
1225         uint32_t button;
1226         uint32_t modifier;
1227         wlsc_binding_handler_t handler;
1228         void *data;
1229         struct wl_list link;
1230 };
1231
1232 WL_EXPORT void
1233 notify_button(struct wl_input_device *device,
1234               uint32_t time, int32_t button, int32_t state)
1235 {
1236         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1237         struct wlsc_compositor *compositor =
1238                 (struct wlsc_compositor *) device->compositor;
1239         struct wlsc_binding *b;
1240         struct wlsc_surface *surface =
1241                 (struct wlsc_surface *) device->pointer_focus;
1242
1243         if (state)
1244                 wlsc_compositor_idle_inhibit(compositor);
1245         else
1246                 wlsc_compositor_idle_release(compositor);
1247
1248         if (state && surface && device->grab == NULL) {
1249                 wlsc_surface_activate(surface, wd, time);
1250                 wl_input_device_start_grab(device,
1251                                            &device->motion_grab,
1252                                            button, time);
1253         }
1254
1255         wl_list_for_each(b, &compositor->binding_list, link) {
1256                 if (b->button == button &&
1257                     b->modifier == wd->modifier_state && state) {
1258                         b->handler(&wd->input_device,
1259                                    time, 0, button, state, b->data);
1260                         break;
1261                 }
1262         }
1263
1264         if (device->grab)
1265                 device->grab->interface->button(device->grab, time,
1266                                                 button, state);
1267
1268         if (!state && device->grab && device->grab_button == button)
1269                 wl_input_device_end_grab(device, time);
1270 }
1271
1272 static void
1273 terminate_binding(struct wl_input_device *device, uint32_t time,
1274                   uint32_t key, uint32_t button, uint32_t state, void *data)
1275 {
1276         struct wlsc_compositor *compositor = data;
1277
1278         if (state)
1279                 wl_display_terminate(compositor->wl_display);
1280 }
1281
1282 WL_EXPORT struct wlsc_binding *
1283 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1284                             uint32_t key, uint32_t button, uint32_t modifier,
1285                             wlsc_binding_handler_t handler, void *data)
1286 {
1287         struct wlsc_binding *binding;
1288
1289         binding = malloc(sizeof *binding);
1290         if (binding == NULL)
1291                 return NULL;
1292
1293         binding->key = key;
1294         binding->button = button;
1295         binding->modifier = modifier;
1296         binding->handler = handler;
1297         binding->data = data;
1298         wl_list_insert(compositor->binding_list.prev, &binding->link);
1299
1300         return binding;
1301 }
1302
1303 WL_EXPORT void
1304 wlsc_binding_destroy(struct wlsc_binding *binding)
1305 {
1306         wl_list_remove(&binding->link);
1307         free(binding);
1308 }
1309
1310 static void
1311 update_modifier_state(struct wlsc_input_device *device,
1312                       uint32_t key, uint32_t state)
1313 {
1314         uint32_t modifier;
1315
1316         switch (key) {
1317         case KEY_LEFTCTRL:
1318         case KEY_RIGHTCTRL:
1319                 modifier = MODIFIER_CTRL;
1320                 break;
1321
1322         case KEY_LEFTALT:
1323         case KEY_RIGHTALT:
1324                 modifier = MODIFIER_ALT;
1325                 break;
1326
1327         case KEY_LEFTMETA:
1328         case KEY_RIGHTMETA:
1329                 modifier = MODIFIER_SUPER;
1330                 break;
1331
1332         default:
1333                 modifier = 0;
1334                 break;
1335         }
1336
1337         if (state)
1338                 device->modifier_state |= modifier;
1339         else
1340                 device->modifier_state &= ~modifier;
1341 }
1342
1343 WL_EXPORT void
1344 notify_key(struct wl_input_device *device,
1345            uint32_t time, uint32_t key, uint32_t state)
1346 {
1347         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1348         struct wlsc_compositor *compositor =
1349                 (struct wlsc_compositor *) device->compositor;
1350         uint32_t *k, *end;
1351         struct wlsc_binding *b;
1352
1353         if (state)
1354                 wlsc_compositor_idle_inhibit(compositor);
1355         else
1356                 wlsc_compositor_idle_release(compositor);
1357
1358         wl_list_for_each(b, &compositor->binding_list, link) {
1359                 if (b->key == key &&
1360                     b->modifier == wd->modifier_state) {
1361                         b->handler(&wd->input_device,
1362                                    time, key, 0, state, b->data);
1363                         break;
1364                 }
1365         }
1366
1367         update_modifier_state(wd, key, state);
1368         end = device->keys.data + device->keys.size;
1369         for (k = device->keys.data; k < end; k++) {
1370                 if (*k == key)
1371                         *k = *--end;
1372         }
1373         device->keys.size = (void *) end - device->keys.data;
1374         if (state) {
1375                 k = wl_array_add(&device->keys, sizeof *k);
1376                 *k = key;
1377         }
1378
1379         if (device->keyboard_focus != NULL)
1380                 wl_client_post_event(device->keyboard_focus->client,
1381                                      &device->object,
1382                                      WL_INPUT_DEVICE_KEY, time, key, state);
1383 }
1384
1385 WL_EXPORT void
1386 notify_pointer_focus(struct wl_input_device *device,
1387                      uint32_t time, struct wlsc_output *output,
1388                      int32_t x, int32_t y)
1389 {
1390         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1391         struct wlsc_compositor *compositor =
1392                 (struct wlsc_compositor *) device->compositor;
1393         struct wlsc_surface *es;
1394         int32_t sx, sy;
1395
1396         if (output) {
1397                 device->x = x;
1398                 device->y = y;
1399                 es = pick_surface(device, &sx, &sy);
1400                 wl_input_device_set_pointer_focus(device,
1401                                                   &es->surface,
1402                                                   time, x, y, sx, sy);
1403
1404                 compositor->focus = 1;
1405
1406                 wd->sprite->x = device->x - wd->hotspot_x;
1407                 wd->sprite->y = device->y - wd->hotspot_y;
1408         } else {
1409                 wl_input_device_set_pointer_focus(device, NULL,
1410                                                   time, 0, 0, 0, 0);
1411                 compositor->focus = 0;
1412         }
1413
1414         wlsc_surface_damage(wd->sprite);
1415 }
1416
1417 WL_EXPORT void
1418 notify_keyboard_focus(struct wl_input_device *device,
1419                       uint32_t time, struct wlsc_output *output,
1420                       struct wl_array *keys)
1421 {
1422         struct wlsc_input_device *wd =
1423                 (struct wlsc_input_device *) device;
1424         struct wlsc_compositor *compositor =
1425                 (struct wlsc_compositor *) device->compositor;
1426         struct wlsc_surface *es;
1427         uint32_t *k, *end;
1428
1429         if (!wl_list_empty(&compositor->surface_list))
1430                 es = container_of(compositor->surface_list.next,
1431                                   struct wlsc_surface, link);
1432         else
1433                 es = NULL;
1434
1435         if (output) {
1436                 wl_array_copy(&wd->input_device.keys, keys);
1437                 wd->modifier_state = 0;
1438                 end = device->keys.data + device->keys.size;
1439                 for (k = device->keys.data; k < end; k++) {
1440                         wlsc_compositor_idle_inhibit(compositor);
1441                         update_modifier_state(wd, *k, 1);
1442                 }
1443
1444                 wl_input_device_set_keyboard_focus(&wd->input_device,
1445                                                    &es->surface, time);
1446         } else {
1447                 end = device->keys.data + device->keys.size;
1448                 for (k = device->keys.data; k < end; k++)
1449                         wlsc_compositor_idle_release(compositor);
1450
1451                 wd->modifier_state = 0;
1452                 wl_input_device_set_keyboard_focus(&wd->input_device,
1453                                                    NULL, time);
1454         }
1455 }
1456
1457
1458 static void
1459 input_device_attach(struct wl_client *client,
1460                     struct wl_input_device *device_base,
1461                     uint32_t time,
1462                     struct wl_buffer *buffer, int32_t x, int32_t y)
1463 {
1464         struct wlsc_input_device *device =
1465                 (struct wlsc_input_device *) device_base;
1466
1467         if (time < device->input_device.pointer_focus_time)
1468                 return;
1469         if (device->input_device.pointer_focus == NULL)
1470                 return;
1471         if (device->input_device.pointer_focus->client != client)
1472                 return;
1473
1474         if (buffer == NULL) {
1475                 wlsc_input_device_set_pointer_image(device,
1476                                                     WLSC_POINTER_LEFT_PTR);
1477                 return;
1478         }
1479
1480         wlsc_input_device_attach_buffer(device, buffer, x, y);
1481 }
1482
1483 const static struct wl_input_device_interface input_device_interface = {
1484         input_device_attach,
1485 };
1486
1487 WL_EXPORT void
1488 wlsc_input_device_init(struct wlsc_input_device *device,
1489                        struct wlsc_compositor *ec)
1490 {
1491         wl_input_device_init(&device->input_device, &ec->compositor);
1492
1493         device->input_device.object.interface = &wl_input_device_interface;
1494         device->input_device.object.implementation =
1495                 (void (**)(void)) &input_device_interface;
1496         wl_display_add_object(ec->wl_display, &device->input_device.object);
1497         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1498
1499         device->sprite = wlsc_surface_create(ec,
1500                                              device->input_device.x,
1501                                              device->input_device.y, 32, 32);
1502         device->hotspot_x = 16;
1503         device->hotspot_y = 16;
1504         device->modifier_state = 0;
1505
1506         device->input_device.motion_grab.interface = &motion_grab_interface;
1507
1508         wl_list_insert(ec->input_device_list.prev, &device->link);
1509
1510         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1511 }
1512
1513 static void
1514 wlsc_output_post_geometry(struct wl_client *client,
1515                           struct wl_object *global, uint32_t version)
1516 {
1517         struct wlsc_output *output =
1518                 container_of(global, struct wlsc_output, object);
1519         struct wlsc_mode *mode;
1520
1521         wl_client_post_event(client, global,
1522                              WL_OUTPUT_GEOMETRY,
1523                              output->x,
1524                              output->y,
1525                              output->mm_width,
1526                              output->mm_height,
1527                              output->subpixel,
1528                              output->make, output->model);
1529
1530         wl_list_for_each (mode, &output->mode_list, link) {
1531                 wl_client_post_event(client, global,
1532                                      WL_OUTPUT_MODE,
1533                                      mode->flags,
1534                                      mode->width, mode->height, mode->refresh);
1535         }
1536 }
1537
1538 static const char vertex_shader[] =
1539         "uniform mat4 proj;\n"
1540         "attribute vec2 position;\n"
1541         "attribute vec2 texcoord;\n"
1542         "varying vec2 v_texcoord;\n"
1543         "void main()\n"
1544         "{\n"
1545         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1546         "   v_texcoord = texcoord;\n"
1547         "}\n";
1548
1549 static const char texture_fragment_shader[] =
1550         "precision mediump float;\n"
1551         "varying vec2 v_texcoord;\n"
1552         "uniform sampler2D tex;\n"
1553         "void main()\n"
1554         "{\n"
1555         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1556         "}\n";
1557
1558 static const char solid_fragment_shader[] =
1559         "precision mediump float;\n"
1560         "uniform vec4 color;\n"
1561         "void main()\n"
1562         "{\n"
1563         "   gl_FragColor = color\n;"
1564         "}\n";
1565
1566 static int
1567 compile_shader(GLenum type, const char *source)
1568 {
1569         GLuint s;
1570         char msg[512];
1571         GLint status;
1572
1573         s = glCreateShader(type);
1574         glShaderSource(s, 1, &source, NULL);
1575         glCompileShader(s);
1576         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1577         if (!status) {
1578                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1579                 fprintf(stderr, "shader info: %s\n", msg);
1580                 return GL_NONE;
1581         }
1582
1583         return s;
1584 }
1585
1586 static int
1587 wlsc_shader_init(struct wlsc_shader *shader,
1588                  const char *vertex_source, const char *fragment_source)
1589 {
1590         char msg[512];
1591         GLint status;
1592
1593         shader->vertex_shader =
1594                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1595         shader->fragment_shader =
1596                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1597
1598         shader->program = glCreateProgram();
1599         glAttachShader(shader->program, shader->vertex_shader);
1600         glAttachShader(shader->program, shader->fragment_shader);
1601         glBindAttribLocation(shader->program, 0, "position");
1602         glBindAttribLocation(shader->program, 1, "texcoord");
1603
1604         glLinkProgram(shader->program);
1605         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1606         if (!status) {
1607                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1608                 fprintf(stderr, "link info: %s\n", msg);
1609                 return -1;
1610         }
1611
1612         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1613         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1614
1615         return 0;
1616 }
1617
1618 static int
1619 init_solid_shader(struct wlsc_shader *shader,
1620                   GLuint vertex_shader, const char *fragment_source)
1621 {
1622         GLint status;
1623         char msg[512];
1624
1625         shader->vertex_shader = vertex_shader;
1626         shader->fragment_shader =
1627                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1628
1629         shader->program = glCreateProgram();
1630         glAttachShader(shader->program, shader->vertex_shader);
1631         glAttachShader(shader->program, shader->fragment_shader);
1632         glBindAttribLocation(shader->program, 0, "position");
1633         glBindAttribLocation(shader->program, 1, "texcoord");
1634
1635         glLinkProgram(shader->program);
1636         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1637         if (!status) {
1638                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1639                 fprintf(stderr, "link info: %s\n", msg);
1640                 return -1;
1641         }
1642
1643         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1644         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1645
1646         return 0;
1647 }
1648
1649 WL_EXPORT void
1650 wlsc_output_destroy(struct wlsc_output *output)
1651 {
1652         pixman_region32_fini(&output->region);
1653         destroy_surface(&output->background->surface.resource, NULL);
1654 }
1655
1656 WL_EXPORT void
1657 wlsc_output_move(struct wlsc_output *output, int x, int y)
1658 {
1659         struct wlsc_compositor *c = output->compositor;
1660         int flip;
1661
1662         output->x = x;
1663         output->y = y;
1664
1665         if (output->background) {
1666                 output->background->x = x;
1667                 output->background->y = y;
1668         }
1669
1670         pixman_region32_init(&output->previous_damage_region);
1671         pixman_region32_init_rect(&output->region, x, y,
1672                                   output->current->width,
1673                                   output->current->height);
1674
1675         wlsc_matrix_init(&output->matrix);
1676         wlsc_matrix_translate(&output->matrix,
1677                               -output->x - output->current->width / 2.0,
1678                               -output->y - output->current->height / 2.0, 0);
1679
1680         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1681         wlsc_matrix_scale(&output->matrix,
1682                           2.0 / output->current->width,
1683                           flip * 2.0 / output->current->height, 1);
1684
1685         pixman_region32_union(&c->damage_region,
1686                               &c->damage_region, &output->region);
1687 }
1688
1689 WL_EXPORT void
1690 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1691                  int x, int y, int width, int height, uint32_t flags)
1692 {
1693         output->compositor = c;
1694         output->x = x;
1695         output->y = y;
1696         output->mm_width = width;
1697         output->mm_height = height;
1698
1699         output->background =
1700                 background_create(output, option_background);
1701
1702         output->flags = flags;
1703         wlsc_output_move(output, x, y);
1704
1705         output->scanout_buffer_destroy_listener.func =
1706                 output_handle_scanout_buffer_destroy;
1707         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1708
1709         output->object.interface = &wl_output_interface;
1710         wl_display_add_object(c->wl_display, &output->object);
1711         wl_display_add_global(c->wl_display, &output->object,
1712                               wlsc_output_post_geometry);
1713 }
1714
1715 static void
1716 shm_buffer_created(struct wl_buffer *buffer)
1717 {
1718         struct wl_list *surfaces_attached_to;
1719
1720         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1721         if (!surfaces_attached_to) {
1722                 buffer->user_data = NULL;
1723                 return;
1724         }
1725
1726         wl_list_init(surfaces_attached_to);
1727
1728         buffer->user_data = surfaces_attached_to;
1729 }
1730
1731 static void
1732 shm_buffer_damaged(struct wl_buffer *buffer,
1733                    int32_t x, int32_t y, int32_t width, int32_t height)
1734 {
1735         struct wl_list *surfaces_attached_to = buffer->user_data;
1736         struct wlsc_surface *es;
1737         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1738
1739         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1740                 glBindTexture(GL_TEXTURE_2D, es->texture);
1741                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1742                              tex_width, buffer->height, 0,
1743                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1744                              wl_shm_buffer_get_data(buffer));
1745                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1746                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1747         }
1748 }
1749
1750 static void
1751 shm_buffer_destroyed(struct wl_buffer *buffer)
1752 {
1753         struct wl_list *surfaces_attached_to = buffer->user_data;
1754         struct wlsc_surface *es, *next;
1755
1756         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1757                 wl_list_remove(&es->buffer_link);
1758                 wl_list_init(&es->buffer_link);
1759         }
1760
1761         free(surfaces_attached_to);
1762 }
1763
1764 const static struct wl_shm_callbacks shm_callbacks = {
1765         shm_buffer_created,
1766         shm_buffer_damaged,
1767         shm_buffer_destroyed
1768 };
1769
1770 WL_EXPORT int
1771 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1772 {
1773         struct wl_event_loop *loop;
1774         const char *extensions;
1775
1776         ec->wl_display = display;
1777
1778         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1779
1780         ec->shm = wl_shm_init(display, &shm_callbacks);
1781
1782         ec->image_target_texture_2d =
1783                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1784         ec->image_target_renderbuffer_storage = (void *)
1785                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1786         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1787         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1788         ec->bind_display =
1789                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1790         ec->unbind_display =
1791                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1792
1793         extensions = (const char *) glGetString(GL_EXTENSIONS);
1794         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1795                 fprintf(stderr,
1796                         "GL_EXT_texture_format_BGRA8888 not available\n");
1797                 return -1;
1798         }
1799
1800         extensions =
1801                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1802         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1803                 ec->has_bind_display = 1;
1804         if (ec->has_bind_display)
1805                 ec->bind_display(ec->display, ec->wl_display);
1806
1807         wl_list_init(&ec->surface_list);
1808         wl_list_init(&ec->input_device_list);
1809         wl_list_init(&ec->output_list);
1810         wl_list_init(&ec->binding_list);
1811         wl_list_init(&ec->animation_list);
1812         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1813         ec->fade.animation.frame = fade_frame;
1814         wl_list_init(&ec->fade.animation.link);
1815
1816         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1817                                     MODIFIER_CTRL | MODIFIER_ALT,
1818                                     terminate_binding, ec);
1819
1820         create_pointer_images(ec);
1821
1822         screenshooter_create(ec);
1823
1824         glActiveTexture(GL_TEXTURE0);
1825
1826         if (wlsc_shader_init(&ec->texture_shader,
1827                              vertex_shader, texture_fragment_shader) < 0)
1828                 return -1;
1829         if (init_solid_shader(&ec->solid_shader,
1830                               ec->texture_shader.vertex_shader,
1831                               solid_fragment_shader) < 0)
1832                 return -1;
1833
1834         loop = wl_display_get_event_loop(ec->wl_display);
1835         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1836         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1837
1838         pixman_region32_init(&ec->damage_region);
1839         wlsc_compositor_schedule_repaint(ec);
1840
1841         return 0;
1842 }
1843
1844 static int on_term_signal(int signal_number, void *data)
1845 {
1846         struct wlsc_compositor *ec = data;
1847
1848         wl_display_terminate(ec->wl_display);
1849
1850         return 1;
1851 }
1852
1853 static void *
1854 load_module(const char *name, const char *entrypoint, void **handle)
1855 {
1856         char path[PATH_MAX];
1857         void *module, *init;
1858
1859         if (name[0] != '/')
1860                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1861         else
1862                 snprintf(path, sizeof path, "%s", name);
1863
1864         module = dlopen(path, RTLD_LAZY);
1865         if (!module) {
1866                 fprintf(stderr,
1867                         "failed to load module: %s\n", dlerror());
1868                 return NULL;
1869         }
1870
1871         init = dlsym(module, entrypoint);
1872         if (!init) {
1873                 fprintf(stderr,
1874                         "failed to lookup init function: %s\n", dlerror());
1875                 return NULL;
1876         }
1877
1878         return init;
1879 }
1880
1881 int main(int argc, char *argv[])
1882 {
1883         struct wl_display *display;
1884         struct wlsc_compositor *ec;
1885         struct wl_event_loop *loop;
1886         int o;
1887         void *shell_module, *backend_module;
1888         int (*shell_init)(struct wlsc_compositor *ec);
1889         struct wlsc_compositor
1890                 *(*backend_init)(struct wl_display *display, char *options);
1891         char *backend = NULL;
1892         char *backend_options = "";
1893         char *shell = NULL;
1894         char *p;
1895
1896         static const char opts[] = "B:b:o:S:i:s:";
1897         static const struct option longopts[ ] = {
1898                 { "backend", 1, NULL, 'B' },
1899                 { "backend-options", 1, NULL, 'o' },
1900                 { "background", 1, NULL, 'b' },
1901                 { "socket", 1, NULL, 'S' },
1902                 { "idle-time", 1, NULL, 'i' },
1903                 { "shell", 1, NULL, 's' },
1904                 { NULL, }
1905         };
1906
1907         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1908                 switch (o) {
1909                 case 'b':
1910                         option_background = optarg;
1911                         break;
1912                 case 'B':
1913                         backend = optarg;
1914                         break;
1915                 case 'o':
1916                         backend_options = optarg;
1917                         break;
1918                 case 'S':
1919                         option_socket_name = optarg;
1920                         break;
1921                 case 'i':
1922                         option_idle_time = strtol(optarg, &p, 0);
1923                         if (*p != '\0') {
1924                                 fprintf(stderr,
1925                                         "invalid idle time option: %s\n",
1926                                         optarg);
1927                                 exit(EXIT_FAILURE);
1928                         }
1929                         break;
1930                 case 's':
1931                         shell = optarg;
1932                         break;
1933                 }
1934         }
1935
1936         display = wl_display_create();
1937
1938         ec = NULL;
1939
1940         if (!backend) {
1941                 if (getenv("WAYLAND_DISPLAY"))
1942                         backend = "wayland-backend.so";
1943                 else if (getenv("DISPLAY"))
1944                         backend = "x11-backend.so";
1945                 else if (getenv("OPENWFD"))
1946                         backend = "openwfd-backend.so";
1947                 else
1948                         backend = "drm-backend.so";
1949         }
1950
1951         if (!shell)
1952                 shell = "desktop-shell.so";
1953
1954         backend_init = load_module(backend, "backend_init", &backend_module);
1955         if (!backend_init)
1956                 exit(EXIT_FAILURE);
1957
1958         shell_init = load_module(shell, "shell_init", &shell_module);
1959         if (!shell_init)
1960                 exit(EXIT_FAILURE);
1961
1962         ec = backend_init(display, backend_options);
1963         if (ec == NULL) {
1964                 fprintf(stderr, "failed to create compositor\n");
1965                 exit(EXIT_FAILURE);
1966         }
1967
1968         if (shell_init(ec) < 0)
1969                 exit(EXIT_FAILURE);
1970
1971         if (wl_display_add_socket(display, option_socket_name)) {
1972                 fprintf(stderr, "failed to add socket: %m\n");
1973                 exit(EXIT_FAILURE);
1974         }
1975
1976         loop = wl_display_get_event_loop(ec->wl_display);
1977         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
1978         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
1979
1980         wl_display_run(display);
1981
1982         if (ec->has_bind_display)
1983                 ec->unbind_display(ec->display, display);
1984         wl_display_destroy(display);
1985
1986         ec->destroy(ec);
1987
1988         return 0;
1989 }