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_rect(&compositor->damage_region,
 638                                    &compositor->damage_region,
 639                                    output->x, output->y,
 640                                    output->current->width,
 641                                    output->current->height);
 642         wlsc_compositor_schedule_repaint(compositor);
 643 }
 644
 645 static void
 646 fade_frame(struct wlsc_animation *animation,
 647            struct wlsc_output *output, uint32_t msecs)
 648 {
 649         struct wlsc_compositor *compositor =
 650                 container_of(animation,
 651                              struct wlsc_compositor, fade.animation);
 652
 653         wlsc_spring_update(&compositor->fade.spring, msecs);
 654         if (wlsc_spring_done(&compositor->fade.spring)) {
 655                 if (compositor->fade.spring.current > 0.999) {
 656                         compositor->state = WLSC_COMPOSITOR_SLEEPING;
 657                         compositor->shell->lock(compositor->shell);
 658                 }
 659                 compositor->fade.spring.current =
 660                         compositor->fade.spring.target;
 661                 wl_list_remove(&animation->link);
 662                 wl_list_init(&animation->link);
 663         }
 664
 665         wlsc_output_damage(output);
 666 }
 667
 668 static void
 669 fade_output(struct wlsc_output *output,
 670             GLfloat tint, pixman_region32_t *region)
 671 {
 672         struct wlsc_compositor *compositor = output->compositor;
 673         struct wlsc_surface surface;
 674         GLfloat color[4] = { 0.0, 0.0, 0.0, tint };
 675
 676         surface.compositor = compositor;
 677         surface.x = output->x;
 678         surface.y = output->y;
 679         surface.width = output->current->width;
 680         surface.height = output->current->height;
 681         surface.texture = GL_NONE;
 682         surface.transform = NULL;
 683
 684         if (tint <= 1.0)
 685                 surface.visual =
 686                         &compositor->compositor.premultiplied_argb_visual;
 687         else
 688                 surface.visual = &compositor->compositor.rgb_visual;
 689
 690         glUseProgram(compositor->solid_shader.program);
 691         glUniformMatrix4fv(compositor->solid_shader.proj_uniform,
 692                            1, GL_FALSE, output->matrix.d);
 693         glUniform4fv(compositor->solid_shader.color_uniform, 1, color);
 694         wlsc_surface_draw(&surface, output, region);
 695 }
 696
 697 static void
 698 wlsc_output_repaint(struct wlsc_output *output)
 699 {
 700         struct wlsc_compositor *ec = output->compositor;
 701         struct wlsc_surface *es;
 702         struct wlsc_input_device *eid, *hw_cursor;
 703         pixman_region32_t new_damage, total_damage;
 704
 705         output->prepare_render(output);
 706
 707         glViewport(0, 0, output->current->width, output->current->height);
 708
 709         glUseProgram(ec->texture_shader.program);
 710         glUniformMatrix4fv(ec->texture_shader.proj_uniform,
 711                            1, GL_FALSE, output->matrix.d);
 712         glUniform1i(ec->texture_shader.tex_uniform, 0);
 713
 714         pixman_region32_init(&new_damage);
 715         pixman_region32_init(&total_damage);
 716         pixman_region32_intersect_rect(&new_damage,
 717                                        &ec->damage_region,
 718                                        output->x, output->y,
 719                                        output->current->width,
 720                                        output->current->height);
 721         pixman_region32_subtract(&ec->damage_region,
 722                                  &ec->damage_region, &new_damage);
 723         pixman_region32_union(&total_damage, &new_damage,
 724                               &output->previous_damage_region);
 725         pixman_region32_copy(&output->previous_damage_region, &new_damage);
 726
 727         hw_cursor = NULL;
 728         if (ec->focus && ec->fade.spring.current < 0.001) {
 729                 hw_cursor = (struct wlsc_input_device *) ec->input_device;
 730                 if (output->set_hardware_cursor(output, hw_cursor) < 0)
 731                         hw_cursor = NULL;
 732         } else {
 733                 output->set_hardware_cursor(output, NULL);
 734         }
 735
 736         es = container_of(ec->surface_list.next, struct wlsc_surface, link);
 737
 738         if (es->visual == &ec->compositor.rgb_visual && hw_cursor) {
 739                 if (output->prepare_scanout_surface(output, es) == 0) {
 740                         /* We're drawing nothing now,
 741                          * draw the damaged regions later. */
 742                         pixman_region32_union(&ec->damage_region,
 743                                               &ec->damage_region,
 744                                               &total_damage);
 745
 746                         output->scanout_buffer = es->buffer;
 747                         output->scanout_buffer->busy_count++;
 748
 749                         wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 750                         wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 751                                        &output->scanout_buffer_destroy_listener.link);
 752
 753                         return;
 754                 }
 755         }
 756
 757         if (es->fullscreen_output == output) {
 758                 if (es->width < output->current->width ||
 759                     es->height < output->current->height)
 760                         glClear(GL_COLOR_BUFFER_BIT);
 761                 wlsc_surface_draw(es, output, &total_damage);
 762         } else {
 763                 if (output->background)
 764                         wlsc_surface_draw(output->background,
 765                                           output, &total_damage);
 766                 else
 767                         fade_output(output, 1.0, &total_damage);
 768
 769                 glUseProgram(ec->texture_shader.program);
 770                 wl_list_for_each_reverse(es, &ec->surface_list, link) {
 771                         if (ec->overlay == es)
 772                                 continue;
 773
 774                         wlsc_surface_draw(es, output, &total_damage);
 775                 }
 776         }
 777
 778         if (ec->overlay)
 779                 wlsc_surface_draw(ec->overlay, output, &total_damage);
 780
 781         if (ec->focus)
 782                 wl_list_for_each(eid, &ec->input_device_list, link) {
 783                         if (&eid->input_device != ec->input_device ||
 784                             eid != hw_cursor)
 785                                 wlsc_surface_draw(eid->sprite, output,
 786                                                   &total_damage);
 787                 }
 788
 789         if (ec->fade.spring.current > 0.001)
 790                 fade_output(output, ec->fade.spring.current, &total_damage);
 791 }
 792
 793 static void
 794 repaint(void *data, int msecs)
 795 {
 796         struct wlsc_output *output = data;
 797         struct wlsc_compositor *compositor = output->compositor;
 798         struct wlsc_surface *es;
 799         struct wlsc_animation *animation, *next;
 800
 801         wlsc_output_repaint(output);
 802         output->repaint_needed = 0;
 803         output->repaint_scheduled = 1;
 804         output->present(output);
 805
 806         /* FIXME: Keep the surfaces in an per-output list. */
 807         wl_list_for_each(es, &compositor->surface_list, link) {
 808                 if (es->output == output) {
 809                         wl_display_post_frame(compositor->wl_display,
 810                                               &es->surface, msecs);
 811                 }
 812         }
 813
 814         wl_list_for_each_safe(animation, next,
 815                               &compositor->animation_list, link)
 816                 animation->frame(animation, output, msecs);
 817 }
 818
 819 static void
 820 idle_repaint(void *data)
 821 {
 822         repaint(data, wlsc_compositor_get_time());
 823 }
 824
 825 WL_EXPORT void
 826 wlsc_output_finish_frame(struct wlsc_output *output, int msecs)
 827 {
 828         wlsc_buffer_post_release(output->scanout_buffer);
 829         output->scanout_buffer = NULL;
 830         output->repaint_scheduled = 0;
 831
 832         if (output->repaint_needed)
 833                 repaint(output, msecs);
 834 }
 835
 836 WL_EXPORT void
 837 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 838 {
 839         struct wlsc_output *output;
 840         struct wl_event_loop *loop;
 841
 842         if (compositor->state == WLSC_COMPOSITOR_SLEEPING)
 843                 return;
 844
 845         loop = wl_display_get_event_loop(compositor->wl_display);
 846         wl_list_for_each(output, &compositor->output_list, link) {
 847                 output->repaint_needed = 1;
 848                 if (output->repaint_scheduled)
 849                         continue;
 850
 851                 wl_event_loop_add_idle(loop, idle_repaint, output);
 852                 output->repaint_scheduled = 1;
 853         }
 854 }
 855
 856 WL_EXPORT void
 857 wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 858 {
 859         int done;
 860
 861         done = wlsc_spring_done(&compositor->fade.spring);
 862         compositor->fade.spring.target = tint;
 863         if (wlsc_spring_done(&compositor->fade.spring))
 864                 return;
 865
 866         if (done)
 867                 compositor->fade.spring.timestamp =
 868                         wlsc_compositor_get_time();
 869
 870         wlsc_compositor_damage_all(compositor);
 871         if (wl_list_empty(&compositor->fade.animation.link))
 872                 wl_list_insert(compositor->animation_list.prev,
 873                                &compositor->fade.animation.link);
 874 }
 875
 876 static void
 877 surface_destroy(struct wl_client *client,
 878                 struct wl_surface *surface)
 879 {
 880         wl_resource_destroy(&surface->resource, client,
 881                             wlsc_compositor_get_time());
 882 }
 883
 884 WL_EXPORT void
 885 wlsc_surface_assign_output(struct wlsc_surface *es)
 886 {
 887         struct wlsc_compositor *ec = es->compositor;
 888         struct wlsc_output *output;
 889
 890         struct wlsc_output *tmp = es->output;
 891         es->output = NULL;
 892
 893         wl_list_for_each(output, &ec->output_list, link) {
 894                 if (output->x < es->x && es->x < output->x + output->current->width &&
 895                     output->y < es->y && es->y < output->y + output->current->height) {
 896                         if (output != tmp)
 897                                 printf("assiging surface %p to output %p\n",
 898                                        es, output);
 899                         es->output = output;
 900                 }
 901         }
 902
 903         if (es->output == NULL) {
 904                 printf("no output found\n");
 905                 es->output = container_of(ec->output_list.next,
 906                                           struct wlsc_output, link);
 907         }
 908 }
 909
 910 static void
 911 surface_attach(struct wl_client *client,
 912                struct wl_surface *surface, struct wl_buffer *buffer,
 913                int32_t x, int32_t y)
 914 {
 915         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 916
 917         buffer->busy_count++;
 918         wlsc_buffer_post_release(es->buffer);
 919
 920         es->buffer = buffer;
 921         wl_list_remove(&es->buffer_destroy_listener.link);
 922         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 923                        &es->buffer_destroy_listener.link);
 924
 925         es->x += x;
 926         es->y += y;
 927         es->width = buffer->width;
 928         es->height = buffer->height;
 929         if (x != 0 || y != 0)
 930                 wlsc_surface_assign_output(es);
 931         if (es->visual == NULL)
 932                 wl_list_insert(&es->compositor->surface_list, &es->link);
 933
 934         wlsc_buffer_attach(buffer, surface);
 935
 936         /* FIXME: This damages the entire old surface, but we should
 937          * really just damage the part that's no longer covered by the
 938          * surface.  Anything covered by the new surface will be
 939          * damaged by the client. */
 940         wlsc_surface_damage(es);
 941
 942         es->compositor->shell->attach(es->compositor->shell, es);
 943 }
 944
 945 static void
 946 surface_damage(struct wl_client *client,
 947                struct wl_surface *surface,
 948                int32_t x, int32_t y, int32_t width, int32_t height)
 949 {
 950         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 951
 952         wlsc_surface_damage_rectangle(es, x, y, width, height);
 953 }
 954
 955 const static struct wl_surface_interface surface_interface = {
 956         surface_destroy,
 957         surface_attach,
 958         surface_damage
 959 };
 960
 961 static void
 962 wlsc_input_device_attach(struct wlsc_input_device *device,
 963                          int x, int y, int width, int height)
 964 {
 965         wlsc_surface_damage(device->sprite);
 966
 967         device->hotspot_x = x;
 968         device->hotspot_y = y;
 969
 970         device->sprite->x = device->input_device.x - device->hotspot_x;
 971         device->sprite->y = device->input_device.y - device->hotspot_y;
 972         device->sprite->width = width;
 973         device->sprite->height = height;
 974
 975         wlsc_surface_damage(device->sprite);
 976 }
 977
 978 static void
 979 wlsc_input_device_attach_buffer(struct wlsc_input_device *device,
 980                                 struct wl_buffer *buffer, int x, int y)
 981 {
 982         wlsc_buffer_attach(buffer, &device->sprite->surface);
 983         wlsc_input_device_attach(device, x, y, buffer->width, buffer->height);
 984 }
 985
 986 static void
 987 wlsc_input_device_attach_sprite(struct wlsc_input_device *device,
 988                                 struct wlsc_sprite *sprite, int x, int y)
 989 {
 990         wlsc_sprite_attach(sprite, &device->sprite->surface);
 991         wlsc_input_device_attach(device, x, y, sprite->width, sprite->height);
 992 }
 993
 994 WL_EXPORT void
 995 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 996                                     enum wlsc_pointer_type type)
 997 {
 998         struct wlsc_compositor *compositor =
 999                 (struct wlsc_compositor *) device->input_device.compositor;
1000
1001         wlsc_input_device_attach_sprite(device,
1002                                         compositor->pointer_sprites[type],
1003                                         pointer_images[type].hotspot_x,
1004                                         pointer_images[type].hotspot_y);
1005 }
1006
1007 static void
1008 compositor_create_surface(struct wl_client *client,
1009                           struct wl_compositor *compositor, uint32_t id)
1010 {
1011         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
1012         struct wlsc_surface *surface;
1013
1014         surface = wlsc_surface_create(ec, 0, 0, 0, 0);
1015         if (surface == NULL) {
1016                 wl_client_post_no_memory(client);
1017                 return;
1018         }
1019
1020         surface->surface.resource.destroy = destroy_surface;
1021
1022         surface->surface.resource.object.id = id;
1023         surface->surface.resource.object.interface = &wl_surface_interface;
1024         surface->surface.resource.object.implementation =
1025                 (void (**)(void)) &surface_interface;
1026         surface->surface.client = client;
1027
1028         wl_client_add_resource(client, &surface->surface.resource);
1029 }
1030
1031 const static struct wl_compositor_interface compositor_interface = {
1032         compositor_create_surface,
1033 };
1034
1035 static void
1036 wlsc_surface_transform(struct wlsc_surface *surface,
1037                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
1038 {
1039         *sx = x - surface->x;
1040         *sy = y - surface->y;
1041 }
1042
1043 WL_EXPORT struct wlsc_surface *
1044 pick_surface(struct wl_input_device *device, int32_t *sx, int32_t *sy)
1045 {
1046         struct wlsc_compositor *ec =
1047                 (struct wlsc_compositor *) device->compositor;
1048         struct wlsc_surface *es;
1049
1050         wl_list_for_each(es, &ec->surface_list, link) {
1051                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
1052                 if (0 <= *sx && *sx < es->width &&
1053                     0 <= *sy && *sy < es->height)
1054                         return es;
1055         }
1056
1057         return NULL;
1058 }
1059
1060
1061 static void
1062 motion_grab_motion(struct wl_grab *grab,
1063                    uint32_t time, int32_t x, int32_t y)
1064 {
1065         struct wlsc_input_device *device =
1066                 (struct wlsc_input_device *) grab->input_device;
1067         struct wlsc_surface *es =
1068                 (struct wlsc_surface *) device->input_device.pointer_focus;
1069         int32_t sx, sy;
1070
1071         wlsc_surface_transform(es, x, y, &sx, &sy);
1072         wl_client_post_event(es->surface.client,
1073                              &device->input_device.object,
1074                              WL_INPUT_DEVICE_MOTION,
1075                              time, x, y, sx, sy);
1076 }
1077
1078 static void
1079 motion_grab_button(struct wl_grab *grab,
1080                    uint32_t time, int32_t button, int32_t state)
1081 {
1082         wl_client_post_event(grab->input_device->pointer_focus->client,
1083                              &grab->input_device->object,
1084                              WL_INPUT_DEVICE_BUTTON,
1085                              time, button, state);
1086 }
1087
1088 static void
1089 motion_grab_end(struct wl_grab *grab, uint32_t time)
1090 {
1091 }
1092
1093 static const struct wl_grab_interface motion_grab_interface = {
1094         motion_grab_motion,
1095         motion_grab_button,
1096         motion_grab_end
1097 };
1098
1099 WL_EXPORT void
1100 wlsc_compositor_wake(struct wlsc_compositor *compositor)
1101 {
1102         if (compositor->idle_inhibit)
1103                 return;
1104
1105         wlsc_compositor_fade(compositor, 0.0);
1106         compositor->state = WLSC_COMPOSITOR_ACTIVE;
1107
1108         wl_event_source_timer_update(compositor->idle_source,
1109                                      option_idle_time * 1000);
1110 }
1111
1112 static void
1113 wlsc_compositor_idle_inhibit(struct wlsc_compositor *compositor)
1114 {
1115         wlsc_compositor_wake(compositor);
1116         compositor->idle_inhibit++;
1117 }
1118
1119 static void
1120 wlsc_compositor_idle_release(struct wlsc_compositor *compositor)
1121 {
1122         compositor->idle_inhibit--;
1123         wlsc_compositor_wake(compositor);
1124 }
1125
1126 static int
1127 idle_handler(void *data)
1128 {
1129         struct wlsc_compositor *compositor = data;
1130
1131         if (compositor->idle_inhibit)
1132                 return 1;
1133
1134         wlsc_compositor_fade(compositor, 1.0);
1135
1136         return 1;
1137 }
1138
1139 WL_EXPORT void
1140 notify_motion(struct wl_input_device *device, uint32_t time, int x, int y)
1141 {
1142         struct wlsc_surface *es;
1143         struct wlsc_compositor *ec =
1144                 (struct wlsc_compositor *) device->compositor;
1145         struct wlsc_output *output;
1146         const struct wl_grab_interface *interface;
1147         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1148         int32_t sx, sy;
1149         int x_valid = 0, y_valid = 0;
1150         int min_x = INT_MAX, min_y = INT_MAX, max_x = INT_MIN, max_y = INT_MIN;
1151
1152         wlsc_compositor_wake(ec);
1153
1154         wl_list_for_each(output, &ec->output_list, link) {
1155                 if (output->x <= x && x <= output->x + output->current->width)
1156                         x_valid = 1;
1157
1158                 if (output->y <= y && y <= output->y + output->current->height)
1159                         y_valid = 1;
1160
1161                 /* FIXME: calculate this only on output addition/deletion */
1162                 if (output->x < min_x)
1163                         min_x = output->x;
1164                 if (output->y < min_y)
1165                         min_y = output->y;
1166
1167                 if (output->x + output->current->width > max_x)
1168                         max_x = output->x + output->current->width;
1169                 if (output->y + output->current->height > max_y)
1170                         max_y = output->y + output->current->height;
1171         }
1172
1173         if (!x_valid) {
1174                 if (x < min_x)
1175                         x = min_x;
1176                 else if (x >= max_x)
1177                         x = max_x;
1178         }
1179         if (!y_valid) {
1180                 if (y < min_y)
1181                         y = min_y;
1182                 else  if (y >= max_y)
1183                         y = max_y;
1184         }
1185
1186         device->x = x;
1187         device->y = y;
1188
1189         if (device->grab) {
1190                 interface = device->grab->interface;
1191                 interface->motion(device->grab, time, x, y);
1192         } else {
1193                 es = pick_surface(device, &sx, &sy);
1194                 wl_input_device_set_pointer_focus(device,
1195                                                   &es->surface,
1196                                                   time, x, y, sx, sy);
1197                 if (es)
1198                         wl_client_post_event(es->surface.client,
1199                                              &device->object,
1200                                              WL_INPUT_DEVICE_MOTION,
1201                                              time, x, y, sx, sy);
1202         }
1203
1204         wlsc_surface_damage(wd->sprite);
1205
1206         wd->sprite->x = device->x - wd->hotspot_x;
1207         wd->sprite->y = device->y - wd->hotspot_y;
1208
1209         wlsc_surface_damage(wd->sprite);
1210 }
1211
1212 WL_EXPORT void
1213 wlsc_surface_activate(struct wlsc_surface *surface,
1214                       struct wlsc_input_device *device, uint32_t time)
1215 {
1216         struct wlsc_shell *shell = surface->compositor->shell;
1217
1218         wlsc_surface_raise(surface);
1219         if (device->selection)
1220                 shell->set_selection_focus(shell,
1221                                            device->selection,
1222                                            &surface->surface, time);
1223
1224         wl_input_device_set_keyboard_focus(&device->input_device,
1225                                            &surface->surface,
1226                                            time);
1227 }
1228
1229 struct wlsc_binding {
1230         uint32_t key;
1231         uint32_t button;
1232         uint32_t modifier;
1233         wlsc_binding_handler_t handler;
1234         void *data;
1235         struct wl_list link;
1236 };
1237
1238 WL_EXPORT void
1239 notify_button(struct wl_input_device *device,
1240               uint32_t time, int32_t button, int32_t state)
1241 {
1242         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1243         struct wlsc_compositor *compositor =
1244                 (struct wlsc_compositor *) device->compositor;
1245         struct wlsc_binding *b;
1246         struct wlsc_surface *surface =
1247                 (struct wlsc_surface *) device->pointer_focus;
1248
1249         if (state)
1250                 wlsc_compositor_idle_inhibit(compositor);
1251         else
1252                 wlsc_compositor_idle_release(compositor);
1253
1254         if (state && surface && device->grab == NULL) {
1255                 wlsc_surface_activate(surface, wd, time);
1256                 wl_input_device_start_grab(device,
1257                                            &device->motion_grab,
1258                                            button, time);
1259         }
1260
1261         wl_list_for_each(b, &compositor->binding_list, link) {
1262                 if (b->button == button &&
1263                     b->modifier == wd->modifier_state && state) {
1264                         b->handler(&wd->input_device,
1265                                    time, 0, button, state, b->data);
1266                         break;
1267                 }
1268         }
1269
1270         if (device->grab)
1271                 device->grab->interface->button(device->grab, time,
1272                                                 button, state);
1273
1274         if (!state && device->grab && device->grab_button == button)
1275                 wl_input_device_end_grab(device, time);
1276 }
1277
1278 static void
1279 terminate_binding(struct wl_input_device *device, uint32_t time,
1280                   uint32_t key, uint32_t button, uint32_t state, void *data)
1281 {
1282         struct wlsc_compositor *compositor = data;
1283
1284         if (state)
1285                 wl_display_terminate(compositor->wl_display);
1286 }
1287
1288 WL_EXPORT struct wlsc_binding *
1289 wlsc_compositor_add_binding(struct wlsc_compositor *compositor,
1290                             uint32_t key, uint32_t button, uint32_t modifier,
1291                             wlsc_binding_handler_t handler, void *data)
1292 {
1293         struct wlsc_binding *binding;
1294
1295         binding = malloc(sizeof *binding);
1296         if (binding == NULL)
1297                 return NULL;
1298
1299         binding->key = key;
1300         binding->button = button;
1301         binding->modifier = modifier;
1302         binding->handler = handler;
1303         binding->data = data;
1304         wl_list_insert(compositor->binding_list.prev, &binding->link);
1305
1306         return binding;
1307 }
1308
1309 WL_EXPORT void
1310 wlsc_binding_destroy(struct wlsc_binding *binding)
1311 {
1312         wl_list_remove(&binding->link);
1313         free(binding);
1314 }
1315
1316 static void
1317 update_modifier_state(struct wlsc_input_device *device,
1318                       uint32_t key, uint32_t state)
1319 {
1320         uint32_t modifier;
1321
1322         switch (key) {
1323         case KEY_LEFTCTRL:
1324         case KEY_RIGHTCTRL:
1325                 modifier = MODIFIER_CTRL;
1326                 break;
1327
1328         case KEY_LEFTALT:
1329         case KEY_RIGHTALT:
1330                 modifier = MODIFIER_ALT;
1331                 break;
1332
1333         case KEY_LEFTMETA:
1334         case KEY_RIGHTMETA:
1335                 modifier = MODIFIER_SUPER;
1336                 break;
1337
1338         default:
1339                 modifier = 0;
1340                 break;
1341         }
1342
1343         if (state)
1344                 device->modifier_state |= modifier;
1345         else
1346                 device->modifier_state &= ~modifier;
1347 }
1348
1349 WL_EXPORT void
1350 notify_key(struct wl_input_device *device,
1351            uint32_t time, uint32_t key, uint32_t state)
1352 {
1353         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1354         struct wlsc_compositor *compositor =
1355                 (struct wlsc_compositor *) device->compositor;
1356         uint32_t *k, *end;
1357         struct wlsc_binding *b;
1358
1359         if (state)
1360                 wlsc_compositor_idle_inhibit(compositor);
1361         else
1362                 wlsc_compositor_idle_release(compositor);
1363
1364         wl_list_for_each(b, &compositor->binding_list, link) {
1365                 if (b->key == key &&
1366                     b->modifier == wd->modifier_state) {
1367                         b->handler(&wd->input_device,
1368                                    time, key, 0, state, b->data);
1369                         break;
1370                 }
1371         }
1372
1373         update_modifier_state(wd, key, state);
1374         end = device->keys.data + device->keys.size;
1375         for (k = device->keys.data; k < end; k++) {
1376                 if (*k == key)
1377                         *k = *--end;
1378         }
1379         device->keys.size = (void *) end - device->keys.data;
1380         if (state) {
1381                 k = wl_array_add(&device->keys, sizeof *k);
1382                 *k = key;
1383         }
1384
1385         if (device->keyboard_focus != NULL)
1386                 wl_client_post_event(device->keyboard_focus->client,
1387                                      &device->object,
1388                                      WL_INPUT_DEVICE_KEY, time, key, state);
1389 }
1390
1391 WL_EXPORT void
1392 notify_pointer_focus(struct wl_input_device *device,
1393                      uint32_t time, struct wlsc_output *output,
1394                      int32_t x, int32_t y)
1395 {
1396         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
1397         struct wlsc_compositor *compositor =
1398                 (struct wlsc_compositor *) device->compositor;
1399         struct wlsc_surface *es;
1400         int32_t sx, sy;
1401
1402         if (output) {
1403                 device->x = x;
1404                 device->y = y;
1405                 es = pick_surface(device, &sx, &sy);
1406                 wl_input_device_set_pointer_focus(device,
1407                                                   &es->surface,
1408                                                   time, x, y, sx, sy);
1409
1410                 compositor->focus = 1;
1411
1412                 wd->sprite->x = device->x - wd->hotspot_x;
1413                 wd->sprite->y = device->y - wd->hotspot_y;
1414         } else {
1415                 wl_input_device_set_pointer_focus(device, NULL,
1416                                                   time, 0, 0, 0, 0);
1417                 compositor->focus = 0;
1418         }
1419
1420         wlsc_surface_damage(wd->sprite);
1421 }
1422
1423 WL_EXPORT void
1424 notify_keyboard_focus(struct wl_input_device *device,
1425                       uint32_t time, struct wlsc_output *output,
1426                       struct wl_array *keys)
1427 {
1428         struct wlsc_input_device *wd =
1429                 (struct wlsc_input_device *) device;
1430         struct wlsc_compositor *compositor =
1431                 (struct wlsc_compositor *) device->compositor;
1432         struct wlsc_surface *es;
1433         uint32_t *k, *end;
1434
1435         if (!wl_list_empty(&compositor->surface_list))
1436                 es = container_of(compositor->surface_list.next,
1437                                   struct wlsc_surface, link);
1438         else
1439                 es = NULL;
1440
1441         if (output) {
1442                 wl_array_copy(&wd->input_device.keys, keys);
1443                 wd->modifier_state = 0;
1444                 end = device->keys.data + device->keys.size;
1445                 for (k = device->keys.data; k < end; k++) {
1446                         wlsc_compositor_idle_inhibit(compositor);
1447                         update_modifier_state(wd, *k, 1);
1448                 }
1449
1450                 wl_input_device_set_keyboard_focus(&wd->input_device,
1451                                                    &es->surface, time);
1452         } else {
1453                 end = device->keys.data + device->keys.size;
1454                 for (k = device->keys.data; k < end; k++)
1455                         wlsc_compositor_idle_release(compositor);
1456
1457                 wd->modifier_state = 0;
1458                 wl_input_device_set_keyboard_focus(&wd->input_device,
1459                                                    NULL, time);
1460         }
1461 }
1462
1463
1464 static void
1465 input_device_attach(struct wl_client *client,
1466                     struct wl_input_device *device_base,
1467                     uint32_t time,
1468                     struct wl_buffer *buffer, int32_t x, int32_t y)
1469 {
1470         struct wlsc_input_device *device =
1471                 (struct wlsc_input_device *) device_base;
1472
1473         if (time < device->input_device.pointer_focus_time)
1474                 return;
1475         if (device->input_device.pointer_focus == NULL)
1476                 return;
1477         if (device->input_device.pointer_focus->client != client)
1478                 return;
1479
1480         if (buffer == NULL) {
1481                 wlsc_input_device_set_pointer_image(device,
1482                                                     WLSC_POINTER_LEFT_PTR);
1483                 return;
1484         }
1485
1486         wlsc_input_device_attach_buffer(device, buffer, x, y);
1487 }
1488
1489 const static struct wl_input_device_interface input_device_interface = {
1490         input_device_attach,
1491 };
1492
1493 WL_EXPORT void
1494 wlsc_input_device_init(struct wlsc_input_device *device,
1495                        struct wlsc_compositor *ec)
1496 {
1497         wl_input_device_init(&device->input_device, &ec->compositor);
1498
1499         device->input_device.object.interface = &wl_input_device_interface;
1500         device->input_device.object.implementation =
1501                 (void (**)(void)) &input_device_interface;
1502         wl_display_add_object(ec->wl_display, &device->input_device.object);
1503         wl_display_add_global(ec->wl_display, &device->input_device.object, NULL);
1504
1505         device->sprite = wlsc_surface_create(ec,
1506                                              device->input_device.x,
1507                                              device->input_device.y, 32, 32);
1508         device->hotspot_x = 16;
1509         device->hotspot_y = 16;
1510         device->modifier_state = 0;
1511
1512         device->input_device.motion_grab.interface = &motion_grab_interface;
1513
1514         wl_list_insert(ec->input_device_list.prev, &device->link);
1515
1516         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1517 }
1518
1519 static void
1520 wlsc_output_post_geometry(struct wl_client *client,
1521                           struct wl_object *global, uint32_t version)
1522 {
1523         struct wlsc_output *output =
1524                 container_of(global, struct wlsc_output, object);
1525         struct wlsc_mode *mode;
1526
1527         wl_client_post_event(client, global,
1528                              WL_OUTPUT_GEOMETRY,
1529                              output->x,
1530                              output->y,
1531                              output->mm_width,
1532                              output->mm_height,
1533                              output->subpixel,
1534                              output->make, output->model);
1535
1536         wl_list_for_each (mode, &output->mode_list, link) {
1537                 wl_client_post_event(client, global,
1538                                      WL_OUTPUT_MODE,
1539                                      mode->flags,
1540                                      mode->width, mode->height, mode->refresh);
1541         }
1542 }
1543
1544 static const char vertex_shader[] =
1545         "uniform mat4 proj;\n"
1546         "attribute vec2 position;\n"
1547         "attribute vec2 texcoord;\n"
1548         "varying vec2 v_texcoord;\n"
1549         "void main()\n"
1550         "{\n"
1551         "   gl_Position = proj * vec4(position, 0.0, 1.0);\n"
1552         "   v_texcoord = texcoord;\n"
1553         "}\n";
1554
1555 static const char texture_fragment_shader[] =
1556         "precision mediump float;\n"
1557         "varying vec2 v_texcoord;\n"
1558         "uniform sampler2D tex;\n"
1559         "void main()\n"
1560         "{\n"
1561         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1562         "}\n";
1563
1564 static const char solid_fragment_shader[] =
1565         "precision mediump float;\n"
1566         "uniform vec4 color;\n"
1567         "void main()\n"
1568         "{\n"
1569         "   gl_FragColor = color\n;"
1570         "}\n";
1571
1572 static int
1573 compile_shader(GLenum type, const char *source)
1574 {
1575         GLuint s;
1576         char msg[512];
1577         GLint status;
1578
1579         s = glCreateShader(type);
1580         glShaderSource(s, 1, &source, NULL);
1581         glCompileShader(s);
1582         glGetShaderiv(s, GL_COMPILE_STATUS, &status);
1583         if (!status) {
1584                 glGetShaderInfoLog(s, sizeof msg, NULL, msg);
1585                 fprintf(stderr, "shader info: %s\n", msg);
1586                 return GL_NONE;
1587         }
1588
1589         return s;
1590 }
1591
1592 static int
1593 wlsc_shader_init(struct wlsc_shader *shader,
1594                  const char *vertex_source, const char *fragment_source)
1595 {
1596         char msg[512];
1597         GLint status;
1598
1599         shader->vertex_shader =
1600                 compile_shader(GL_VERTEX_SHADER, vertex_source);
1601         shader->fragment_shader =
1602                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1603
1604         shader->program = glCreateProgram();
1605         glAttachShader(shader->program, shader->vertex_shader);
1606         glAttachShader(shader->program, shader->fragment_shader);
1607         glBindAttribLocation(shader->program, 0, "position");
1608         glBindAttribLocation(shader->program, 1, "texcoord");
1609
1610         glLinkProgram(shader->program);
1611         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1612         if (!status) {
1613                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1614                 fprintf(stderr, "link info: %s\n", msg);
1615                 return -1;
1616         }
1617
1618         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1619         shader->tex_uniform = glGetUniformLocation(shader->program, "tex");
1620
1621         return 0;
1622 }
1623
1624 static int
1625 init_solid_shader(struct wlsc_shader *shader,
1626                   GLuint vertex_shader, const char *fragment_source)
1627 {
1628         GLint status;
1629         char msg[512];
1630
1631         shader->vertex_shader = vertex_shader;
1632         shader->fragment_shader =
1633                 compile_shader(GL_FRAGMENT_SHADER, fragment_source);
1634
1635         shader->program = glCreateProgram();
1636         glAttachShader(shader->program, shader->vertex_shader);
1637         glAttachShader(shader->program, shader->fragment_shader);
1638         glBindAttribLocation(shader->program, 0, "position");
1639         glBindAttribLocation(shader->program, 1, "texcoord");
1640
1641         glLinkProgram(shader->program);
1642         glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
1643         if (!status) {
1644                 glGetProgramInfoLog(shader->program, sizeof msg, NULL, msg);
1645                 fprintf(stderr, "link info: %s\n", msg);
1646                 return -1;
1647         }
1648
1649         shader->proj_uniform = glGetUniformLocation(shader->program, "proj");
1650         shader->color_uniform = glGetUniformLocation(shader->program, "color");
1651
1652         return 0;
1653 }
1654
1655 WL_EXPORT void
1656 wlsc_output_destroy(struct wlsc_output *output)
1657 {
1658         destroy_surface(&output->background->surface.resource, NULL);
1659 }
1660
1661 WL_EXPORT void
1662 wlsc_output_move(struct wlsc_output *output, int x, int y)
1663 {
1664         struct wlsc_compositor *c = output->compositor;
1665         int flip;
1666
1667         output->x = x;
1668         output->y = y;
1669
1670         if (output->background) {
1671                 output->background->x = x;
1672                 output->background->y = y;
1673         }
1674
1675         pixman_region32_init(&output->previous_damage_region);
1676
1677         wlsc_matrix_init(&output->matrix);
1678         wlsc_matrix_translate(&output->matrix,
1679                               -output->x - output->current->width / 2.0,
1680                               -output->y - output->current->height / 2.0, 0);
1681
1682         flip = (output->flags & WL_OUTPUT_FLIPPED) ? -1 : 1;
1683         wlsc_matrix_scale(&output->matrix,
1684                           2.0 / output->current->width,
1685                           flip * 2.0 / output->current->height, 1);
1686
1687         pixman_region32_union_rect(&c->damage_region,
1688                                    &c->damage_region,
1689                                    x, y,
1690                                    output->current->width,
1691                                    output->current->height);
1692 }
1693
1694 WL_EXPORT void
1695 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1696                  int x, int y, int width, int height, uint32_t flags)
1697 {
1698         output->compositor = c;
1699         output->x = x;
1700         output->y = y;
1701         output->mm_width = width;
1702         output->mm_height = height;
1703
1704         output->background =
1705                 background_create(output, option_background);
1706
1707         output->flags = flags;
1708         wlsc_output_move(output, x, y);
1709
1710         output->scanout_buffer_destroy_listener.func =
1711                 output_handle_scanout_buffer_destroy;
1712         wl_list_init(&output->scanout_buffer_destroy_listener.link);
1713
1714         output->object.interface = &wl_output_interface;
1715         wl_display_add_object(c->wl_display, &output->object);
1716         wl_display_add_global(c->wl_display, &output->object,
1717                               wlsc_output_post_geometry);
1718 }
1719
1720 static void
1721 shm_buffer_created(struct wl_buffer *buffer)
1722 {
1723         struct wl_list *surfaces_attached_to;
1724
1725         surfaces_attached_to = malloc(sizeof *surfaces_attached_to);
1726         if (!surfaces_attached_to) {
1727                 buffer->user_data = NULL;
1728                 return;
1729         }
1730
1731         wl_list_init(surfaces_attached_to);
1732
1733         buffer->user_data = surfaces_attached_to;
1734 }
1735
1736 static void
1737 shm_buffer_damaged(struct wl_buffer *buffer,
1738                    int32_t x, int32_t y, int32_t width, int32_t height)
1739 {
1740         struct wl_list *surfaces_attached_to = buffer->user_data;
1741         struct wlsc_surface *es;
1742         GLsizei tex_width = wl_shm_buffer_get_stride(buffer) / 4;
1743
1744         wl_list_for_each(es, surfaces_attached_to, buffer_link) {
1745                 glBindTexture(GL_TEXTURE_2D, es->texture);
1746                 glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
1747                              tex_width, buffer->height, 0,
1748                              GL_BGRA_EXT, GL_UNSIGNED_BYTE,
1749                              wl_shm_buffer_get_data(buffer));
1750                 /* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
1751                  * support any unpack attributes except GL_UNPACK_ALIGNMENT. */
1752         }
1753 }
1754
1755 static void
1756 shm_buffer_destroyed(struct wl_buffer *buffer)
1757 {
1758         struct wl_list *surfaces_attached_to = buffer->user_data;
1759         struct wlsc_surface *es, *next;
1760
1761         wl_list_for_each_safe(es, next, surfaces_attached_to, buffer_link) {
1762                 wl_list_remove(&es->buffer_link);
1763                 wl_list_init(&es->buffer_link);
1764         }
1765
1766         free(surfaces_attached_to);
1767 }
1768
1769 const static struct wl_shm_callbacks shm_callbacks = {
1770         shm_buffer_created,
1771         shm_buffer_damaged,
1772         shm_buffer_destroyed
1773 };
1774
1775 WL_EXPORT int
1776 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1777 {
1778         struct wl_event_loop *loop;
1779         const char *extensions;
1780
1781         ec->wl_display = display;
1782
1783         wl_compositor_init(&ec->compositor, &compositor_interface, display);
1784
1785         ec->shm = wl_shm_init(display, &shm_callbacks);
1786
1787         ec->image_target_texture_2d =
1788                 (void *) eglGetProcAddress("glEGLImageTargetTexture2DOES");
1789         ec->image_target_renderbuffer_storage = (void *)
1790                 eglGetProcAddress("glEGLImageTargetRenderbufferStorageOES");
1791         ec->create_image = (void *) eglGetProcAddress("eglCreateImageKHR");
1792         ec->destroy_image = (void *) eglGetProcAddress("eglDestroyImageKHR");
1793         ec->bind_display =
1794                 (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
1795         ec->unbind_display =
1796                 (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
1797
1798         extensions = (const char *) glGetString(GL_EXTENSIONS);
1799         if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
1800                 fprintf(stderr,
1801                         "GL_EXT_texture_format_BGRA8888 not available\n");
1802                 return -1;
1803         }
1804
1805         extensions =
1806                 (const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
1807         if (strstr(extensions, "EGL_WL_bind_wayland_display"))
1808                 ec->has_bind_display = 1;
1809         if (ec->has_bind_display)
1810                 ec->bind_display(ec->display, ec->wl_display);
1811
1812         wl_list_init(&ec->surface_list);
1813         wl_list_init(&ec->input_device_list);
1814         wl_list_init(&ec->output_list);
1815         wl_list_init(&ec->binding_list);
1816         wl_list_init(&ec->animation_list);
1817         wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
1818         ec->fade.animation.frame = fade_frame;
1819         wl_list_init(&ec->fade.animation.link);
1820
1821         wlsc_compositor_add_binding(ec, KEY_BACKSPACE, 0,
1822                                     MODIFIER_CTRL | MODIFIER_ALT,
1823                                     terminate_binding, ec);
1824
1825         create_pointer_images(ec);
1826
1827         screenshooter_create(ec);
1828
1829         glActiveTexture(GL_TEXTURE0);
1830
1831         if (wlsc_shader_init(&ec->texture_shader,
1832                              vertex_shader, texture_fragment_shader) < 0)
1833                 return -1;
1834         if (init_solid_shader(&ec->solid_shader,
1835                               ec->texture_shader.vertex_shader,
1836                               solid_fragment_shader) < 0)
1837                 return -1;
1838
1839         loop = wl_display_get_event_loop(ec->wl_display);
1840         ec->idle_source = wl_event_loop_add_timer(loop, idle_handler, ec);
1841         wl_event_source_timer_update(ec->idle_source, option_idle_time * 1000);
1842
1843         pixman_region32_init(&ec->damage_region);
1844         wlsc_compositor_schedule_repaint(ec);
1845
1846         return 0;
1847 }
1848
1849 static int on_term_signal(int signal_number, void *data)
1850 {
1851         struct wlsc_compositor *ec = data;
1852
1853         wl_display_terminate(ec->wl_display);
1854
1855         return 1;
1856 }
1857
1858 static void *
1859 load_module(const char *name, const char *entrypoint, void **handle)
1860 {
1861         char path[PATH_MAX];
1862         void *module, *init;
1863
1864         if (name[0] != '/')
1865                 snprintf(path, sizeof path, MODULEDIR "/%s", name);
1866         else
1867                 snprintf(path, sizeof path, "%s", name);
1868
1869         module = dlopen(path, RTLD_LAZY);
1870         if (!module) {
1871                 fprintf(stderr,
1872                         "failed to load module: %s\n", dlerror());
1873                 return NULL;
1874         }
1875
1876         init = dlsym(module, entrypoint);
1877         if (!init) {
1878                 fprintf(stderr,
1879                         "failed to lookup init function: %s\n", dlerror());
1880                 return NULL;
1881         }
1882
1883         return init;
1884 }
1885
1886 int main(int argc, char *argv[])
1887 {
1888         struct wl_display *display;
1889         struct wlsc_compositor *ec;
1890         struct wl_event_loop *loop;
1891         int o;
1892         void *shell_module, *backend_module;
1893         int (*shell_init)(struct wlsc_compositor *ec);
1894         struct wlsc_compositor
1895                 *(*backend_init)(struct wl_display *display, char *options);
1896         char *backend = NULL;
1897         char *backend_options = "";
1898         char *shell = NULL;
1899         char *p;
1900
1901         static const char opts[] = "B:b:o:S:i:s:";
1902         static const struct option longopts[ ] = {
1903                 { "backend", 1, NULL, 'B' },
1904                 { "backend-options", 1, NULL, 'o' },
1905                 { "background", 1, NULL, 'b' },
1906                 { "socket", 1, NULL, 'S' },
1907                 { "idle-time", 1, NULL, 'i' },
1908                 { "shell", 1, NULL, 's' },
1909                 { NULL, }
1910         };
1911
1912         while (o = getopt_long(argc, argv, opts, longopts, &o), o > 0) {
1913                 switch (o) {
1914                 case 'b':
1915                         option_background = optarg;
1916                         break;
1917                 case 'B':
1918                         backend = optarg;
1919                         break;
1920                 case 'o':
1921                         backend_options = optarg;
1922                         break;
1923                 case 'S':
1924                         option_socket_name = optarg;
1925                         break;
1926                 case 'i':
1927                         option_idle_time = strtol(optarg, &p, 0);
1928                         if (*p != '\0') {
1929                                 fprintf(stderr,
1930                                         "invalid idle time option: %s\n",
1931                                         optarg);
1932                                 exit(EXIT_FAILURE);
1933                         }
1934                         break;
1935                 case 's':
1936                         shell = optarg;
1937                         break;
1938                 }
1939         }
1940
1941         display = wl_display_create();
1942
1943         ec = NULL;
1944
1945         if (!backend) {
1946                 if (getenv("WAYLAND_DISPLAY"))
1947                         backend = "wayland-backend.so";
1948                 else if (getenv("DISPLAY"))
1949                         backend = "x11-backend.so";
1950                 else if (getenv("OPENWFD"))
1951                         backend = "openwfd-backend.so";
1952                 else
1953                         backend = "drm-backend.so";
1954         }
1955
1956         if (!shell)
1957                 shell = "desktop-shell.so";
1958
1959         backend_init = load_module(backend, "backend_init", &backend_module);
1960         if (!backend_init)
1961                 exit(EXIT_FAILURE);
1962
1963         shell_init = load_module(shell, "shell_init", &shell_module);
1964         if (!shell_init)
1965                 exit(EXIT_FAILURE);
1966
1967         ec = backend_init(display, backend_options);
1968         if (ec == NULL) {
1969                 fprintf(stderr, "failed to create compositor\n");
1970                 exit(EXIT_FAILURE);
1971         }
1972
1973         if (shell_init(ec) < 0)
1974                 exit(EXIT_FAILURE);
1975
1976         if (wl_display_add_socket(display, option_socket_name)) {
1977                 fprintf(stderr, "failed to add socket: %m\n");
1978                 exit(EXIT_FAILURE);
1979         }
1980
1981         loop = wl_display_get_event_loop(ec->wl_display);
1982         wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
1983         wl_event_loop_add_signal(loop, SIGINT, on_term_signal, ec);
1984
1985         wl_display_run(display);
1986
1987         if (ec->has_bind_display)
1988                 ec->unbind_display(ec->display, display);
1989         wl_display_destroy(display);
1990
1991         ec->destroy(ec);
1992
1993         return 0;
1994 }