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 #include <stdio.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <stdint.h>
  23 #include <stdarg.h>
  24 #include <sys/ioctl.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #include <gdk-pixbuf/gdk-pixbuf.h>
  28 #include <math.h>
  29 #include <time.h>
  30 #include <linux/input.h>
  31
  32 #include "wayland-server-protocol.h"
  33 #include "compositor.h"
  34
  35 const char *option_background = "background.jpg";
  36 int option_connector = 0;
  37
  38 static const GOptionEntry option_entries[] = {
  39         { "background", 'b', 0, G_OPTION_ARG_STRING,
  40           &option_background, "Background image" },
  41         { "connector", 'c', 0, G_OPTION_ARG_INT,
  42           &option_connector, "KMS connector" },
  43         { NULL }
  44 };
  45
  46 static void
  47 wlsc_input_device_set_pointer_focus(struct wlsc_input_device *device,
  48                                     struct wlsc_surface *surface,
  49                                     uint32_t time,
  50                                     int32_t x, int32_t y,
  51                                     int32_t sx, int32_t sy);
  52
  53 static void
  54 wlsc_matrix_init(struct wlsc_matrix *matrix)
  55 {
  56         static const struct wlsc_matrix identity = {
  57                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  0, 0, 0, 1 }
  58         };
  59
  60         memcpy(matrix, &identity, sizeof identity);
  61 }
  62
  63 static void
  64 wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
  65 {
  66         struct wlsc_matrix tmp;
  67         const GLfloat *row, *column;
  68         div_t d;
  69         int i, j;
  70
  71         for (i = 0; i < 16; i++) {
  72                 tmp.d[i] = 0;
  73                 d = div(i, 4);
  74                 row = m->d + d.quot * 4;
  75                 column = n->d + d.rem;
  76                 for (j = 0; j < 4; j++)
  77                         tmp.d[i] += row[j] * column[j * 4];
  78         }
  79         memcpy(m, &tmp, sizeof tmp);
  80 }
  81
  82 static void
  83 wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  84 {
  85         struct wlsc_matrix translate = {
  86                 { 1, 0, 0, 0,  0, 1, 0, 0,  0, 0, 1, 0,  x, y, z, 1 }
  87         };
  88
  89         wlsc_matrix_multiply(matrix, &translate);
  90 }
  91
  92 static void
  93 wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
  94 {
  95         struct wlsc_matrix scale = {
  96                 { x, 0, 0, 0,  0, y, 0, 0,  0, 0, z, 0,  0, 0, 0, 1 }
  97         };
  98
  99         wlsc_matrix_multiply(matrix, &scale);
 100 }
 101
 102 static void
 103 wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 104 {
 105         int i, j;
 106         struct wlsc_vector t;
 107
 108         for (i = 0; i < 4; i++) {
 109                 t.f[i] = 0;
 110                 for (j = 0; j < 4; j++)
 111                         t.f[i] += v->f[j] * matrix->d[i + j * 4];
 112         }
 113
 114         *v = t;
 115 }
 116
 117 static struct wlsc_surface *
 118 wlsc_surface_create(struct wlsc_compositor *compositor,
 119                     struct wl_visual *visual,
 120                     int32_t x, int32_t y, int32_t width, int32_t height)
 121 {
 122         struct wlsc_surface *surface;
 123
 124         surface = malloc(sizeof *surface);
 125         if (surface == NULL)
 126                 return NULL;
 127
 128         glGenTextures(1, &surface->texture);
 129         glBindTexture(GL_TEXTURE_2D, surface->texture);
 130         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 131         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 132         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 133         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 134
 135         surface->compositor = compositor;
 136         surface->visual = visual;
 137         surface->x = x;
 138         surface->y = y;
 139         surface->width = width;
 140         surface->height = height;
 141         wlsc_matrix_init(&surface->matrix);
 142         wlsc_matrix_scale(&surface->matrix, width, height, 1);
 143         wlsc_matrix_translate(&surface->matrix, x, y, 0);
 144
 145         wlsc_matrix_init(&surface->matrix_inv);
 146         wlsc_matrix_translate(&surface->matrix_inv, -x, -y, 0);
 147         wlsc_matrix_scale(&surface->matrix_inv, 1.0 / width, 1.0 / height, 1);
 148
 149         return surface;
 150 }
 151
 152 static void
 153 destroy_surface(struct wl_resource *resource, struct wl_client *client)
 154 {
 155         struct wlsc_surface *surface =
 156                 container_of(resource, struct wlsc_surface, base.base);
 157         struct wlsc_compositor *compositor = surface->compositor;
 158         struct wlsc_listener *l;
 159
 160         wl_list_remove(&surface->link);
 161         glDeleteTextures(1, &surface->texture);
 162
 163         wl_list_for_each(l, &compositor->surface_destroy_listener_list, link)
 164                 l->func(l, surface);
 165
 166         free(surface);
 167
 168         wlsc_compositor_schedule_repaint(compositor);
 169 }
 170
 171 static int
 172 texture_from_png(const char *filename, int width, int height)
 173 {
 174         GdkPixbuf *pixbuf;
 175         GError *error = NULL;
 176         void *data;
 177         GLenum format;
 178
 179         pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
 180                                                    width, height,
 181                                                    FALSE, &error);
 182         if (error != NULL)
 183                 return -1;
 184
 185         data = gdk_pixbuf_get_pixels(pixbuf);
 186
 187         if (gdk_pixbuf_get_has_alpha(pixbuf))
 188                 format = GL_RGBA;
 189         else
 190                 format = GL_RGB;
 191
 192         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 193                      width, height, 0, format, GL_UNSIGNED_BYTE, data);
 194
 195         gdk_pixbuf_unref(pixbuf);
 196
 197         return 0;
 198 }
 199
 200 static const struct {
 201         const char *filename;
 202         int hotspot_x, hotspot_y;
 203 } pointer_images[] = {
 204         { DATADIR "/wayland/bottom_left_corner.png",     6, 30 },
 205         { DATADIR "/wayland/bottom_right_corner.png",   28, 28 },
 206         { DATADIR "/wayland/bottom_side.png",           16, 20 },
 207         { DATADIR "/wayland/grabbing.png",              20, 17 },
 208         { DATADIR "/wayland/left_ptr.png",              10,  5 },
 209         { DATADIR "/wayland/left_side.png",             10, 20 },
 210         { DATADIR "/wayland/right_side.png",            30, 19 },
 211         { DATADIR "/wayland/top_left_corner.png",        8,  8 },
 212         { DATADIR "/wayland/top_right_corner.png",      26,  8 },
 213         { DATADIR "/wayland/top_side.png",              18,  8 },
 214         { DATADIR "/wayland/xterm.png",                 15, 15 }
 215 };
 216
 217 static void
 218 create_pointer_images(struct wlsc_compositor *ec)
 219 {
 220         int i, count;
 221         GLuint texture;
 222         const int width = 32, height = 32;
 223
 224         EGLint image_attribs[] = {
 225                 EGL_WIDTH,              0,
 226                 EGL_HEIGHT,             0,
 227                 EGL_IMAGE_FORMAT_MESA,  EGL_IMAGE_FORMAT_ARGB8888_MESA,
 228                 EGL_IMAGE_USE_MESA,     EGL_IMAGE_USE_SCANOUT_MESA,
 229                 EGL_NONE
 230         };
 231
 232         glGenTextures(1, &texture);
 233         glBindTexture(GL_TEXTURE_2D, texture);
 234         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 235         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 236         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 237         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 238
 239         image_attribs[1] = width;
 240         image_attribs[3] = height;
 241         count = ARRAY_LENGTH(pointer_images);
 242         ec->pointer_buffers = malloc(count * sizeof *ec->pointer_buffers);
 243         for (i = 0; i < count; i++) {
 244                 ec->pointer_buffers[i].image =
 245                         eglCreateDRMImageMESA(ec->display, image_attribs);
 246                 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,
 247                                              ec->pointer_buffers[i].image);
 248                 texture_from_png(pointer_images[i].filename, width, height);
 249                 ec->pointer_buffers[i].visual = &ec->argb_visual;
 250                 ec->pointer_buffers[i].width = width;
 251                 ec->pointer_buffers[i].height = height;
 252         }
 253 }
 254
 255 static struct wlsc_surface *
 256 background_create(struct wlsc_output *output, const char *filename)
 257 {
 258         struct wlsc_surface *background;
 259         GdkPixbuf *pixbuf;
 260         GError *error = NULL;
 261         void *data;
 262         GLenum format;
 263
 264         background = wlsc_surface_create(output->compositor,
 265                                          &output->compositor->rgb_visual,
 266                                          output->x, output->y,
 267                                          output->width, output->height);
 268         if (background == NULL)
 269                 return NULL;
 270
 271         pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
 272                                                    output->width,
 273                                                    output->height,
 274                                                    FALSE, &error);
 275         if (error != NULL) {
 276                 free(background);
 277                 return NULL;
 278         }
 279
 280         data = gdk_pixbuf_get_pixels(pixbuf);
 281
 282         if (gdk_pixbuf_get_has_alpha(pixbuf))
 283                 format = GL_RGBA;
 284         else
 285                 format = GL_RGB;
 286
 287         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
 288                      output->width, output->height, 0,
 289                      format, GL_UNSIGNED_BYTE, data);
 290
 291         return background;
 292 }
 293
 294 static void
 295 wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output)
 296 {
 297         struct wlsc_compositor *ec = es->compositor;
 298         struct wlsc_matrix tmp;
 299
 300         tmp = es->matrix;
 301         wlsc_matrix_multiply(&tmp, &output->matrix);
 302         glUniformMatrix4fv(ec->proj_uniform, 1, GL_FALSE, tmp.d);
 303         glUniform1i(ec->tex_uniform, 0);
 304
 305         if (es->visual == &ec->argb_visual) {
 306                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 307                 glEnable(GL_BLEND);
 308         } else if (es->visual == &ec->premultiplied_argb_visual) {
 309                 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 310                 glEnable(GL_BLEND);
 311         } else {
 312                 glDisable(GL_BLEND);
 313         }
 314
 315         glBindTexture(GL_TEXTURE_2D, es->texture);
 316         glEnable(GL_TEXTURE_2D);
 317         glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
 318         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
 319                               5 * sizeof(GLfloat), NULL);
 320         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE,
 321                               5 * sizeof(GLfloat), (GLfloat *) 0 + 3);
 322         glEnableVertexAttribArray(0);
 323         glEnableVertexAttribArray(1);
 324         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 325 }
 326
 327 static void
 328 wlsc_surface_raise(struct wlsc_surface *surface)
 329 {
 330         struct wlsc_compositor *compositor = surface->compositor;
 331
 332         wl_list_remove(&surface->link);
 333         wl_list_insert(&compositor->surface_list, &surface->link);
 334 }
 335
 336 static void
 337 wlsc_surface_update_matrix(struct wlsc_surface *es)
 338 {
 339         wlsc_matrix_init(&es->matrix);
 340         wlsc_matrix_scale(&es->matrix, es->width, es->height, 1);
 341         wlsc_matrix_translate(&es->matrix, es->x, es->y, 0);
 342
 343         wlsc_matrix_init(&es->matrix_inv);
 344         wlsc_matrix_translate(&es->matrix_inv, -es->x, -es->y, 0);
 345         wlsc_matrix_scale(&es->matrix_inv,
 346                           1.0 / es->width, 1.0 / es->height, 1);
 347 }
 348
 349 void
 350 wlsc_compositor_finish_frame(struct wlsc_compositor *compositor, int msecs)
 351 {
 352         wl_display_post_frame(compositor->wl_display,
 353                               &compositor->base,
 354                               compositor->current_frame, msecs);
 355
 356         wl_event_source_timer_update(compositor->timer_source, 5);
 357         compositor->current_frame++;
 358 }
 359
 360 static void
 361 wlsc_output_repaint(struct wlsc_output *output)
 362 {
 363         struct wlsc_compositor *ec = output->compositor;
 364         struct wlsc_surface *es;
 365         struct wlsc_input_device *eid;
 366
 367         glViewport(0, 0, output->width, output->height);
 368
 369         if (output->background)
 370                 wlsc_surface_draw(output->background, output);
 371         else
 372                 glClear(GL_COLOR_BUFFER_BIT);
 373
 374         wl_list_for_each_reverse(es, &ec->surface_list, link)
 375                 wlsc_surface_draw(es, output);
 376
 377         if (ec->focus)
 378                 wl_list_for_each(eid, &ec->input_device_list, link)
 379                         wlsc_surface_draw(eid->sprite, output);
 380 }
 381
 382 static void
 383 repaint(void *data)
 384 {
 385         struct wlsc_compositor *ec = data;
 386         struct wlsc_output *output;
 387
 388         if (!ec->repaint_needed) {
 389                 ec->repaint_on_timeout = 0;
 390                 return;
 391         }
 392
 393         wl_list_for_each(output, &ec->output_list, link)
 394                 wlsc_output_repaint(output);
 395
 396         ec->present(ec);
 397
 398         ec->repaint_needed = 0;
 399 }
 400
 401 void
 402 wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
 403 {
 404         compositor->repaint_needed = 1;
 405         if (compositor->repaint_on_timeout)
 406                 return;
 407
 408         wl_event_source_timer_update(compositor->timer_source, 1);
 409         compositor->repaint_on_timeout = 1;
 410 }
 411
 412 static void
 413 surface_destroy(struct wl_client *client,
 414                 struct wl_surface *surface)
 415 {
 416         wl_resource_destroy(&surface->base, client);
 417 }
 418
 419 static void
 420 surface_attach(struct wl_client *client,
 421                struct wl_surface *surface, struct wl_buffer *buffer_base)
 422 {
 423         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 424         struct wlsc_buffer *buffer = (struct wlsc_buffer *) buffer_base;
 425
 426         glBindTexture(GL_TEXTURE_2D, es->texture);
 427         glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, buffer->image);
 428         es->visual = buffer->visual;
 429 }
 430
 431 static void
 432 surface_map(struct wl_client *client,
 433             struct wl_surface *surface,
 434             int32_t x, int32_t y, int32_t width, int32_t height)
 435 {
 436         struct wlsc_surface *es = (struct wlsc_surface *) surface;
 437
 438         es->x = x;
 439         es->y = y;
 440         es->width = width;
 441         es->height = height;
 442
 443         wlsc_surface_update_matrix(es);
 444 }
 445
 446 static void
 447 surface_damage(struct wl_client *client,
 448                struct wl_surface *surface,
 449                int32_t x, int32_t y, int32_t width, int32_t height)
 450 {
 451         /* FIXME: This need to take a damage region, of course. */
 452 }
 453
 454 const static struct wl_surface_interface surface_interface = {
 455         surface_destroy,
 456         surface_attach,
 457         surface_map,
 458         surface_damage
 459 };
 460
 461 static void
 462 wlsc_input_device_attach(struct wlsc_input_device *device,
 463                          struct wlsc_buffer *buffer, int x, int y)
 464 {
 465         struct wlsc_compositor *ec = device->ec;
 466
 467         glBindTexture(GL_TEXTURE_2D, device->sprite->texture);
 468         glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, buffer->image);
 469         device->sprite->visual = buffer->visual;
 470         device->hotspot_x = x;
 471         device->hotspot_y = y;
 472
 473         device->sprite->x = device->x - device->hotspot_x;
 474         device->sprite->y = device->y - device->hotspot_y;
 475         device->sprite->width = buffer->width;
 476         device->sprite->height = buffer->height;
 477         wlsc_surface_update_matrix(device->sprite);
 478
 479         wlsc_compositor_schedule_repaint(ec);
 480 }
 481
 482
 483 static void
 484 wlsc_input_device_set_pointer_image(struct wlsc_input_device *device,
 485                                     enum wlsc_pointer_type type)
 486 {
 487         struct wlsc_compositor *compositor = device->ec;
 488
 489         wlsc_input_device_attach(device,
 490                                  &compositor->pointer_buffers[type],
 491                                  pointer_images[type].hotspot_x,
 492                                  pointer_images[type].hotspot_y);
 493 }
 494
 495 static void
 496 wlsc_input_device_start_grab(struct wlsc_input_device *device,
 497                              uint32_t time,
 498                              enum wlsc_grab_type grab)
 499 {
 500         device->grab = grab;
 501         device->grab_surface = device->pointer_focus;
 502         device->grab_dx = device->pointer_focus->x - device->grab_x;
 503         device->grab_dy = device->pointer_focus->y - device->grab_y;
 504         device->grab_width = device->pointer_focus->width;
 505         device->grab_height = device->pointer_focus->height;
 506
 507         wlsc_input_device_set_pointer_focus(device,
 508                                             (struct wlsc_surface *) &wl_grab_surface,
 509                                             time, 0, 0, 0, 0);
 510 }
 511
 512 static void
 513 shell_move(struct wl_client *client, struct wl_shell *shell,
 514            struct wl_surface *surface,
 515            struct wl_input_device *device, uint32_t time)
 516 {
 517         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 518
 519         if (wd->grab != WLSC_DEVICE_GRAB_MOTION ||
 520             wd->grab_time != time ||
 521             &wd->pointer_focus->base != surface)
 522                 return;
 523
 524         wlsc_input_device_start_grab(wd, time, WLSC_DEVICE_GRAB_MOVE);
 525         wlsc_input_device_set_pointer_image(wd, WLSC_POINTER_DRAGGING);
 526 }
 527
 528 static void
 529 shell_resize(struct wl_client *client, struct wl_shell *shell,
 530              struct wl_surface *surface,
 531              struct wl_input_device *device, uint32_t time, uint32_t edges)
 532 {
 533         struct wlsc_input_device *wd = (struct wlsc_input_device *) device;
 534         enum wlsc_pointer_type pointer = WLSC_POINTER_LEFT_PTR;
 535
 536         if (edges == 0 || edges > 15 ||
 537             (edges & 3) == 3 || (edges & 12) == 12)
 538                 return;
 539
 540         if (wd->grab != WLSC_DEVICE_GRAB_MOTION ||
 541             wd->grab_time != time ||
 542             &wd->pointer_focus->base != surface)
 543                 return;
 544
 545         switch (edges) {
 546         case WLSC_DEVICE_GRAB_RESIZE_TOP:
 547                 pointer = WLSC_POINTER_TOP;
 548                 break;
 549         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM:
 550                 pointer = WLSC_POINTER_BOTTOM;
 551                 break;
 552         case WLSC_DEVICE_GRAB_RESIZE_LEFT:
 553                 pointer = WLSC_POINTER_LEFT;
 554                 break;
 555         case WLSC_DEVICE_GRAB_RESIZE_TOP_LEFT:
 556                 pointer = WLSC_POINTER_TOP_LEFT;
 557                 break;
 558         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM_LEFT:
 559                 pointer = WLSC_POINTER_BOTTOM_LEFT;
 560                 break;
 561         case WLSC_DEVICE_GRAB_RESIZE_RIGHT:
 562                 pointer = WLSC_POINTER_RIGHT;
 563                 break;
 564         case WLSC_DEVICE_GRAB_RESIZE_TOP_RIGHT:
 565                 pointer = WLSC_POINTER_TOP_RIGHT;
 566                 break;
 567         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM_RIGHT:
 568                 pointer = WLSC_POINTER_BOTTOM_RIGHT;
 569                 break;
 570         }
 571
 572         wlsc_input_device_start_grab(wd, time, edges);
 573         wlsc_input_device_set_pointer_image(wd, pointer);
 574 }
 575
 576 const static struct wl_shell_interface shell_interface = {
 577         shell_move,
 578         shell_resize
 579 };
 580
 581 static void
 582 compositor_create_surface(struct wl_client *client,
 583                           struct wl_compositor *compositor, uint32_t id)
 584 {
 585         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
 586         struct wlsc_surface *surface;
 587
 588         surface = wlsc_surface_create(ec, NULL, 0, 0, 0, 0);
 589         if (surface == NULL) {
 590                 wl_client_post_event(client,
 591                                      (struct wl_object *) ec->wl_display,
 592                                      WL_DISPLAY_NO_MEMORY, 0);
 593                 return;
 594         }
 595
 596         wl_list_insert(ec->surface_list.prev, &surface->link);
 597         surface->base.base.destroy = destroy_surface;
 598         wl_client_add_surface(client, &surface->base,
 599                               &surface_interface, id);
 600 }
 601
 602 static void
 603 compositor_commit(struct wl_client *client,
 604                   struct wl_compositor *compositor, uint32_t key)
 605 {
 606         struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
 607
 608         wlsc_compositor_schedule_repaint(ec);
 609         wl_client_send_acknowledge(client, compositor, key, ec->current_frame);
 610 }
 611
 612 const static struct wl_compositor_interface compositor_interface = {
 613         compositor_create_surface,
 614         compositor_commit
 615 };
 616
 617 static void
 618 wlsc_surface_transform(struct wlsc_surface *surface,
 619                        int32_t x, int32_t y, int32_t *sx, int32_t *sy)
 620 {
 621         struct wlsc_vector v = { { x, y, 0, 1 } };
 622
 623         wlsc_matrix_transform(&surface->matrix_inv, &v);
 624         *sx = v.f[0] * surface->width;
 625         *sy = v.f[1] * surface->height;
 626 }
 627
 628 static void
 629 wlsc_input_device_set_keyboard_focus(struct wlsc_input_device *device,
 630                                      struct wlsc_surface *surface,
 631                                      uint32_t time)
 632 {
 633         if (device->keyboard_focus == surface)
 634                 return;
 635
 636         if (device->keyboard_focus &&
 637             (!surface || device->keyboard_focus->base.client != surface->base.client))
 638                 wl_surface_post_event(&device->keyboard_focus->base,
 639                                       &device->base.base,
 640                                       WL_INPUT_DEVICE_KEYBOARD_FOCUS,
 641                                       time, NULL, &device->keys);
 642
 643         if (surface)
 644                 wl_surface_post_event(&surface->base,
 645                                       &device->base.base,
 646                                       WL_INPUT_DEVICE_KEYBOARD_FOCUS,
 647                                       time, &surface->base, &device->keys);
 648
 649         device->keyboard_focus = surface;
 650 }
 651
 652 static void
 653 wlsc_input_device_set_pointer_focus(struct wlsc_input_device *device,
 654                                     struct wlsc_surface *surface,
 655                                     uint32_t time,
 656                                     int32_t x, int32_t y,
 657                                     int32_t sx, int32_t sy)
 658 {
 659         if (device->pointer_focus == surface)
 660                 return;
 661
 662         if (device->pointer_focus &&
 663             (!surface || device->pointer_focus->base.client != surface->base.client))
 664                 wl_surface_post_event(&device->pointer_focus->base,
 665                                       &device->base.base,
 666                                       WL_INPUT_DEVICE_POINTER_FOCUS,
 667                                       time, NULL, 0, 0, 0, 0);
 668         if (surface)
 669                 wl_surface_post_event(&surface->base,
 670                                       &device->base.base,
 671                                       WL_INPUT_DEVICE_POINTER_FOCUS,
 672                                       time, &surface->base,
 673                                       x, y, sx, sy);
 674
 675         if (!surface)
 676                 wlsc_input_device_set_pointer_image(device,
 677                                                     WLSC_POINTER_LEFT_PTR);
 678
 679         device->pointer_focus = surface;
 680 }
 681
 682 static struct wlsc_surface *
 683 pick_surface(struct wlsc_input_device *device, int32_t *sx, int32_t *sy)
 684 {
 685         struct wlsc_compositor *ec = device->ec;
 686         struct wlsc_surface *es;
 687
 688         wl_list_for_each(es, &ec->surface_list, link) {
 689                 wlsc_surface_transform(es, device->x, device->y, sx, sy);
 690                 if (0 <= *sx && *sx < es->width &&
 691                     0 <= *sy && *sy < es->height)
 692                         return es;
 693         }
 694
 695         return NULL;
 696 }
 697
 698 static void
 699 wl_drag_reset(struct wl_drag *drag);
 700 static void
 701 wl_drag_set_pointer_focus(struct wl_drag *drag,
 702                           struct wlsc_surface *surface, uint32_t time,
 703                           int32_t x, int32_t y, int32_t sx, int32_t sy);
 704
 705 void
 706 notify_motion(struct wlsc_input_device *device, uint32_t time, int x, int y)
 707 {
 708         struct wlsc_surface *es;
 709         struct wlsc_compositor *ec = device->ec;
 710         struct wlsc_output *output;
 711         int32_t sx, sy, width, height;
 712
 713         /* FIXME: We need some multi head love here. */
 714         output = container_of(ec->output_list.next, struct wlsc_output, link);
 715         if (x < output->x)
 716                 x = 0;
 717         if (y < output->y)
 718                 y = 0;
 719         if (x >= output->x + output->width)
 720                 x = output->x + output->width - 1;
 721         if (y >= output->y + output->height)
 722                 y = output->y + output->height - 1;
 723
 724         device->x = x;
 725         device->y = y;
 726
 727         switch (device->grab) {
 728         case WLSC_DEVICE_GRAB_NONE:
 729                 es = pick_surface(device, &sx, &sy);
 730                 wlsc_input_device_set_pointer_focus(device, es,
 731                                                     time, x, y, sx, sy);
 732                 if (es)
 733                         wl_surface_post_event(&es->base, &device->base.base,
 734                                               WL_INPUT_DEVICE_MOTION,
 735                                               time, x, y, sx, sy);
 736                 break;
 737
 738         case WLSC_DEVICE_GRAB_MOTION:
 739                 es = device->pointer_focus;
 740                 wlsc_surface_transform(es, x, y, &sx, &sy);
 741                 wl_surface_post_event(&es->base, &device->base.base,
 742                                       WL_INPUT_DEVICE_MOTION,
 743                                       time, x, y, sx, sy);
 744                 break;
 745
 746         case WLSC_DEVICE_GRAB_MOVE:
 747                 es = device->grab_surface;
 748                 es->x = x + device->grab_dx;
 749                 es->y = y + device->grab_dy;;
 750                 wl_surface_post_event(&es->base, &ec->shell.base,
 751                                       WL_SHELL_CONFIGURE,
 752                                       time, device->grab,
 753                                       &es->base, es->x, es->y,
 754                                       es->width, es->height);
 755
 756                 wlsc_surface_update_matrix(es);
 757
 758                 break;
 759
 760         case WLSC_DEVICE_GRAB_RESIZE_TOP:
 761         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM:
 762         case WLSC_DEVICE_GRAB_RESIZE_LEFT:
 763         case WLSC_DEVICE_GRAB_RESIZE_TOP_LEFT:
 764         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM_LEFT:
 765         case WLSC_DEVICE_GRAB_RESIZE_RIGHT:
 766         case WLSC_DEVICE_GRAB_RESIZE_TOP_RIGHT:
 767         case WLSC_DEVICE_GRAB_RESIZE_BOTTOM_RIGHT:
 768         case WLSC_DEVICE_GRAB_RESIZE_MASK:
 769                 es = device->grab_surface;
 770
 771                 if (device->grab & WLSC_DEVICE_GRAB_RESIZE_LEFT) {
 772                         sx = x + device->grab_dx;
 773                         width = device->grab_x - x + device->grab_width;
 774                 } else if (device->grab & WLSC_DEVICE_GRAB_RESIZE_RIGHT) {
 775                         sx = device->grab_x + device->grab_dx;
 776                         width = x - device->grab_x + device->grab_width;
 777                 } else {
 778                         sx = device->grab_x + device->grab_dx;
 779                         width = device->grab_width;
 780                 }
 781
 782                 if (device->grab & WLSC_DEVICE_GRAB_RESIZE_TOP) {
 783                         sy = y + device->grab_dy;
 784                         height = device->grab_y - y + device->grab_height;
 785                 } else if (device->grab & WLSC_DEVICE_GRAB_RESIZE_BOTTOM) {
 786                         sy = device->grab_y + device->grab_dy;
 787                         height = y - device->grab_y + device->grab_height;
 788                 } else {
 789                         sy = device->grab_y + device->grab_dy;
 790                         height = device->grab_height;
 791                 }
 792
 793                 wl_surface_post_event(&es->base, &ec->shell.base,
 794                                       WL_SHELL_CONFIGURE, time, device->grab,
 795                                       &es->base, sx, sy, width, height);
 796                 break;
 797
 798         case WLSC_DEVICE_GRAB_DRAG:
 799                 es = pick_surface(device, &sx, &sy);
 800                 wl_drag_set_pointer_focus(&device->drag,
 801                                           es, time, x, y, sx, sy);
 802                 if (es)
 803                         wl_surface_post_event(&es->base, &device->drag.base,
 804                                               WL_DRAG_MOTION,
 805                                               time, x, y, sx, sy);
 806                 break;
 807
 808         }
 809
 810         device->sprite->x = device->x - device->hotspot_x;
 811         device->sprite->y = device->y - device->hotspot_y;
 812         wlsc_surface_update_matrix(device->sprite);
 813
 814         wlsc_compositor_schedule_repaint(device->ec);
 815 }
 816
 817 static void
 818 wlsc_input_device_end_grab(struct wlsc_input_device *device, uint32_t time)
 819 {
 820         struct wl_drag *drag = &device->drag;
 821         struct wlsc_surface *es;
 822         int32_t sx, sy;
 823
 824         switch (device->grab) {
 825         case WLSC_DEVICE_GRAB_DRAG:
 826                 wl_drag_set_pointer_focus(drag, NULL, time, 0, 0, 0, 0);
 827                 wl_surface_post_event(drag->source, &drag->base,
 828                                       WL_DRAG_FINISH);
 829                 wl_drag_reset(drag);
 830                 break;
 831         default:
 832                 break;
 833         }
 834
 835         device->grab = WLSC_DEVICE_GRAB_NONE;
 836         es = pick_surface(device, &sx, &sy);
 837         wlsc_input_device_set_pointer_focus(device, es, time,
 838                                             device->x, device->y, sx, sy);
 839 }
 840
 841 void
 842 notify_button(struct wlsc_input_device *device,
 843               uint32_t time, int32_t button, int32_t state)
 844 {
 845         struct wlsc_surface *surface;
 846         struct wlsc_compositor *compositor = device->ec;
 847
 848         surface = device->pointer_focus;
 849         if (surface) {
 850                 if (state && device->grab == WLSC_DEVICE_GRAB_NONE) {
 851                         wlsc_surface_raise(surface);
 852                         device->grab = WLSC_DEVICE_GRAB_MOTION;
 853                         device->grab_button = button;
 854                         device->grab_time = time;
 855                         device->grab_x = device->x;
 856                         device->grab_y = device->y;
 857                         wlsc_input_device_set_keyboard_focus(device,
 858                                                              surface, time);
 859                 }
 860
 861                 if (state && button == BTN_LEFT &&
 862                     device->grab == WLSC_DEVICE_GRAB_MOTION &&
 863                     (device->modifier_state & MODIFIER_SUPER))
 864                         shell_move(NULL, (struct wl_shell *) &compositor->shell,
 865                                    &surface->base, &device->base, time);
 866                 else if (state && button == BTN_MIDDLE &&
 867                            device->grab == WLSC_DEVICE_GRAB_MOTION &&
 868                            (device->modifier_state & MODIFIER_SUPER))
 869                         shell_resize(NULL, (struct wl_shell *) &compositor->shell,
 870
 871                                      &surface->base, &device->base, time,
 872                                      WLSC_DEVICE_GRAB_RESIZE_BOTTOM_RIGHT);
 873                 else if (device->grab == WLSC_DEVICE_GRAB_NONE ||
 874                          device->grab == WLSC_DEVICE_GRAB_MOTION)
 875                         wl_surface_post_event(&surface->base,
 876                                               &device->base.base,
 877                                               WL_INPUT_DEVICE_BUTTON,
 878                                               time, button, state);
 879
 880                 if (!state &&
 881                     device->grab != WLSC_DEVICE_GRAB_NONE &&
 882                     device->grab_button == button) {
 883                         wlsc_input_device_end_grab(device, time);
 884                 }
 885
 886                 wlsc_compositor_schedule_repaint(compositor);
 887         }
 888 }
 889
 890 void
 891 notify_key(struct wlsc_input_device *device,
 892            uint32_t time, uint32_t key, uint32_t state)
 893 {
 894         uint32_t *k, *end;
 895         uint32_t modifier;
 896
 897         switch (key | device->modifier_state) {
 898         case KEY_BACKSPACE | MODIFIER_CTRL | MODIFIER_ALT:
 899                 kill(0, SIGTERM);
 900                 return;
 901         }
 902
 903         switch (key) {
 904         case KEY_LEFTCTRL:
 905         case KEY_RIGHTCTRL:
 906                 modifier = MODIFIER_CTRL;
 907                 break;
 908
 909         case KEY_LEFTALT:
 910         case KEY_RIGHTALT:
 911                 modifier = MODIFIER_ALT;
 912                 break;
 913
 914         case KEY_LEFTMETA:
 915         case KEY_RIGHTMETA:
 916                 modifier = MODIFIER_SUPER;
 917                 break;
 918
 919         default:
 920                 modifier = 0;
 921                 break;
 922         }
 923
 924         if (state)
 925                 device->modifier_state |= modifier;
 926         else
 927                 device->modifier_state &= ~modifier;
 928
 929         end = device->keys.data + device->keys.size;
 930         for (k = device->keys.data; k < end; k++) {
 931                 if (*k == key)
 932                         *k = *--end;
 933         }
 934         device->keys.size = (void *) end - device->keys.data;
 935         if (state) {
 936                 k = wl_array_add(&device->keys, sizeof *k);
 937                 *k = key;
 938         }
 939
 940         if (device->keyboard_focus != NULL)
 941                 wl_surface_post_event(&device->keyboard_focus->base,
 942                                       &device->base.base,
 943                                       WL_INPUT_DEVICE_KEY, time, key, state);
 944 }
 945
 946 static void
 947 input_device_attach(struct wl_client *client,
 948                     struct wl_input_device *device_base,
 949                     struct wl_buffer *buffer_base, int32_t x, int32_t y)
 950 {
 951         struct wlsc_input_device *device =
 952                 (struct wlsc_input_device *) device_base;
 953         struct wlsc_buffer *buffer = (struct wlsc_buffer *) buffer_base;
 954
 955         if (device->pointer_focus == NULL ||
 956             device->pointer_focus->base.client != client)
 957                 return;
 958
 959         if (buffer == NULL) {
 960                 wlsc_input_device_set_pointer_image(device,
 961                                                     WLSC_POINTER_LEFT_PTR);
 962                 return;
 963         }
 964
 965         wlsc_input_device_attach(device, buffer, x, y);
 966 }
 967
 968 const static struct wl_input_device_interface input_device_interface = {
 969         input_device_attach,
 970 };
 971
 972 static uint32_t
 973 get_time(void)
 974 {
 975         struct timeval tv;
 976
 977         gettimeofday(&tv, NULL);
 978
 979         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 980 }
 981
 982 static void
 983 handle_surface_destroy(struct wlsc_listener *listener,
 984                        struct wlsc_surface *surface)
 985 {
 986         struct wlsc_input_device *device =
 987                 container_of(listener, struct wlsc_input_device, listener);
 988         uint32_t time = get_time();
 989
 990         if (device->keyboard_focus == surface)
 991                 wlsc_input_device_set_keyboard_focus(device, NULL, time);
 992         if (device->pointer_focus == surface ||
 993             (&device->pointer_focus->base == &wl_grab_surface &&
 994              device->grab_surface == surface))
 995                 wlsc_input_device_end_grab(device, time);
 996 }
 997
 998 static void
 999 wl_drag_set_pointer_focus(struct wl_drag *drag,
1000                           struct wlsc_surface *surface, uint32_t time,
1001                           int32_t x, int32_t y, int32_t sx, int32_t sy)
1002 {
1003         if (drag->pointer_focus == &surface->base)
1004                 return;
1005
1006         if (drag->pointer_focus &&
1007             (!surface || drag->pointer_focus->client != surface->base.client))
1008                 wl_surface_post_event(drag->pointer_focus,
1009                                       &drag->base,
1010                                       WL_DRAG_POINTER_FOCUS,
1011                                       time, NULL, 0, 0, 0, 0);
1012         if (surface)
1013                 wl_surface_post_event(&surface->base,
1014                                       &drag->base,
1015                                       WL_DRAG_POINTER_FOCUS,
1016                                       time, &surface->base,
1017                                       x, y, sx, sy);
1018
1019         drag->pointer_focus = &surface->base;
1020 }
1021
1022 static void
1023 wl_drag_reset(struct wl_drag *drag)
1024 {
1025         char **p, **end;
1026
1027         end = drag->types.data + drag->types.size;
1028         for (p = drag->types.data; p < end; p++)
1029                 free(*p);
1030         wl_array_release(&drag->types);
1031         wl_array_init(&drag->types);
1032
1033         drag->source = NULL;
1034         drag->target = NULL;
1035         drag->time = 0;
1036         drag->pointer_focus = NULL;
1037 }
1038
1039 static void
1040 drag_prepare(struct wl_client *client,
1041              struct wl_drag *drag, struct wl_surface *surface, uint32_t time,
1042              struct wl_buffer *buffer, int32_t hotspot_x, int32_t hotspot_y)
1043 {
1044         struct wlsc_input_device *device =
1045                 (struct wlsc_input_device *) drag->input_device;
1046
1047         if (&device->pointer_focus->base != surface ||
1048             device->grab_time != time)
1049                 return;
1050
1051         wl_drag_reset(drag);
1052         drag->source = surface;
1053         drag->time = time;
1054         drag->buffer = buffer;
1055         drag->hotspot_x = hotspot_x;
1056         drag->hotspot_y = hotspot_y;
1057 }
1058
1059 static void
1060 drag_offer(struct wl_client *client, struct wl_drag *drag, const char *type)
1061 {
1062         struct wl_display *display = wl_client_get_display (client);
1063         struct wlsc_input_device *device =
1064                 (struct wlsc_input_device *) drag->input_device;
1065         char **p;
1066
1067         if (drag->source == NULL ||
1068             drag->source->client != client ||
1069             device->grab != WLSC_DEVICE_GRAB_MOTION ||
1070             &device->pointer_focus->base != drag->source ||
1071             device->grab_time != drag->time)
1072                 return;
1073
1074         p = wl_array_add(&drag->types, sizeof *p);
1075         if (p)
1076                 *p = strdup(type);
1077         if (!p || !*p)
1078                 wl_client_post_event(client,
1079                                      (struct wl_object *) display,
1080                                      WL_DISPLAY_NO_MEMORY);
1081 }
1082
1083 static void
1084 drag_activate(struct wl_client *client,
1085               struct wl_drag *drag)
1086 {
1087         struct wlsc_input_device *device =
1088                 (struct wlsc_input_device *) drag->input_device;
1089         struct wlsc_surface *surface;
1090         int32_t sx, sy;
1091
1092         if (drag->source == NULL ||
1093             drag->source->client != client ||
1094             device->grab != WLSC_DEVICE_GRAB_MOTION ||
1095             &device->pointer_focus->base != drag->source ||
1096             device->grab_time != drag->time)
1097                 return;
1098
1099         wlsc_input_device_start_grab(device, drag->time,
1100                                      WLSC_DEVICE_GRAB_DRAG);
1101         wlsc_input_device_attach(device, (struct wlsc_buffer *) drag->buffer,
1102                                  drag->hotspot_x, drag->hotspot_y);
1103
1104         surface = pick_surface(device, &sx, &sy);
1105         wl_drag_set_pointer_focus(&device->drag, surface, drag->time,
1106                                   device->x, device->y, sx, sy);
1107 }
1108
1109 static void
1110 drag_cancel(struct wl_client *client, struct wl_drag *drag)
1111 {
1112         struct wlsc_input_device *device =
1113                 (struct wlsc_input_device *) drag->input_device;
1114
1115         if (drag->source == NULL ||
1116             drag->source->client != client ||
1117             device->grab != WLSC_DEVICE_GRAB_DRAG)
1118                 return;
1119
1120         wlsc_input_device_end_grab(device, get_time());
1121 }
1122
1123 static void
1124 drag_send(struct wl_client *client,
1125           struct wl_drag *drag, struct wl_array *contents)
1126 {
1127         wl_client_post_event(client, &drag->base, WL_DRAG_DROP, contents);
1128 }
1129
1130 static void
1131 drag_accept(struct wl_client *client,
1132             struct wl_drag *drag, const char *type)
1133 {
1134         char **p, **end;
1135
1136         if (drag->pointer_focus->client != client)
1137                 return;
1138
1139         /* FIXME: We need a serial number here to correlate the accept
1140          * request with a pointer_focus/motion event. */
1141         drag->target = client;
1142
1143         end = drag->types.data + drag->types.size;
1144         for (p = drag->types.data; p < end; p++)
1145                 if (strcmp(*p, type) == 0)
1146                     drag->type = *p;
1147
1148         wl_surface_post_event(drag->source, &drag->base,
1149                               WL_DRAG_TARGET, drag->type);
1150 }
1151
1152 static const struct wl_drag_interface drag_interface = {
1153         drag_prepare,
1154         drag_offer,
1155         drag_activate,
1156         drag_cancel,
1157         drag_send,
1158         drag_accept
1159 };
1160
1161 static void
1162 wl_drag_post_device(struct wl_client *client, struct wl_object *global)
1163 {
1164         struct wl_drag *drag = container_of(global, struct wl_drag, base);
1165
1166         wl_client_post_event(client, global,
1167                              WL_DRAG_DEVICE, drag->input_device);
1168 }
1169
1170 static void
1171 wl_drag_init(struct wl_drag *drag,
1172              struct wl_display *display, struct wl_input_device *input_device)
1173 {
1174         drag->base.interface = &wl_drag_interface;
1175         drag->base.implementation = (void (**)(void))
1176                 &drag_interface;
1177
1178         wl_display_add_object(display, &drag->base);
1179         wl_display_add_global(display, &drag->base, wl_drag_post_device);
1180
1181         drag->source = NULL;
1182         wl_array_init(&drag->types);
1183         drag->input_device = input_device;
1184 }
1185
1186 void
1187 wlsc_input_device_init(struct wlsc_input_device *device,
1188                        struct wlsc_compositor *ec)
1189 {
1190         device->base.base.interface = &wl_input_device_interface;
1191         device->base.base.implementation =
1192                 (void (**)(void)) &input_device_interface;
1193         wl_display_add_object(ec->wl_display, &device->base.base);
1194         wl_display_add_global(ec->wl_display, &device->base.base, NULL);
1195
1196         wl_drag_init(&device->drag, ec->wl_display, &device->base);
1197
1198         device->x = 100;
1199         device->y = 100;
1200         device->ec = ec;
1201         device->sprite = wlsc_surface_create(ec, &ec->argb_visual,
1202                                              device->x, device->y, 32, 32);
1203         device->hotspot_x = 16;
1204         device->hotspot_y = 16;
1205
1206         device->listener.func = handle_surface_destroy;
1207         wl_list_insert(ec->surface_destroy_listener_list.prev,
1208                        &device->listener.link);
1209         wl_list_insert(ec->input_device_list.prev, &device->link);
1210
1211         wlsc_input_device_set_pointer_image(device, WLSC_POINTER_LEFT_PTR);
1212 }
1213
1214 static void
1215 wlsc_output_post_geometry(struct wl_client *client, struct wl_object *global)
1216 {
1217         struct wlsc_output *output =
1218                 container_of(global, struct wlsc_output, base);
1219
1220         wl_client_post_event(client, global,
1221                              WL_OUTPUT_GEOMETRY,
1222                              output->width, output->height);
1223 }
1224
1225 static const char vertex_shader[] =
1226         "uniform mat4 proj;\n"
1227         "attribute vec4 position;\n"
1228         "attribute vec2 texcoord;\n"
1229         "varying vec2 v_texcoord;\n"
1230         "void main()\n"
1231         "{\n"
1232         "   gl_Position = proj * position;\n"
1233         "   v_texcoord = texcoord;\n"
1234         "}\n";
1235
1236 static const char fragment_shader[] =
1237         /* "precision mediump float;\n" */
1238         "varying vec2 v_texcoord;\n"
1239         "uniform sampler2D tex;\n"
1240         "void main()\n"
1241         "{\n"
1242         "   gl_FragColor = texture2D(tex, v_texcoord)\n;"
1243         "}\n";
1244
1245 static int
1246 init_shaders(struct wlsc_compositor *ec)
1247 {
1248         GLuint v, f, program;
1249         const char *p;
1250         char msg[512];
1251         GLfloat vertices[4 * 5];
1252         GLint status;
1253
1254         p = vertex_shader;
1255         v = glCreateShader(GL_VERTEX_SHADER);
1256         glShaderSource(v, 1, &p, NULL);
1257         glCompileShader(v);
1258         glGetShaderiv(v, GL_COMPILE_STATUS, &status);
1259         if (!status) {
1260                 glGetShaderInfoLog(v, sizeof msg, NULL, msg);
1261                 fprintf(stderr, "vertex shader info: %s\n", msg);
1262                 return -1;
1263         }
1264
1265         p = fragment_shader;
1266         f = glCreateShader(GL_FRAGMENT_SHADER);
1267         glShaderSource(f, 1, &p, NULL);
1268         glCompileShader(f);
1269         glGetShaderiv(f, GL_COMPILE_STATUS, &status);
1270         if (!status) {
1271                 glGetShaderInfoLog(f, sizeof msg, NULL, msg);
1272                 fprintf(stderr, "fragment shader info: %s\n", msg);
1273                 return -1;
1274         }
1275
1276         program = glCreateProgram();
1277         glAttachShader(program, v);
1278         glAttachShader(program, f);
1279         glBindAttribLocation(program, 0, "position");
1280         glBindAttribLocation(program, 1, "texcoord");
1281
1282         glLinkProgram(program);
1283         glGetProgramiv(program, GL_LINK_STATUS, &status);
1284         if (!status) {
1285                 glGetProgramInfoLog(program, sizeof msg, NULL, msg);
1286                 fprintf(stderr, "link info: %s\n", msg);
1287                 return -1;
1288         }
1289
1290         glUseProgram(program);
1291         ec->proj_uniform = glGetUniformLocation(program, "proj");
1292         ec->tex_uniform = glGetUniformLocation(program, "tex");
1293
1294         vertices[ 0] = 0.0;
1295         vertices[ 1] = 0.0;
1296         vertices[ 2] = 0.0;
1297         vertices[ 3] = 0.0;
1298         vertices[ 4] = 0.0;
1299
1300         vertices[ 5] = 0.0;
1301         vertices[ 6] = 1.0;
1302         vertices[ 7] = 0.0;
1303         vertices[ 8] = 0.0;
1304         vertices[ 9] = 1.0;
1305
1306         vertices[10] = 1.0;
1307         vertices[11] = 0.0;
1308         vertices[12] = 0.0;
1309         vertices[13] = 1.0;
1310         vertices[14] = 0.0;
1311
1312         vertices[15] = 1.0;
1313         vertices[16] = 1.0;
1314         vertices[17] = 0.0;
1315         vertices[18] = 1.0;
1316         vertices[19] = 1.0;
1317
1318         glGenBuffers(1, &ec->vbo);
1319         glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
1320         glBufferData(GL_ARRAY_BUFFER, sizeof vertices, vertices, GL_STATIC_DRAW);
1321
1322         return 0;
1323 }
1324
1325 static const struct wl_interface visual_interface = {
1326         "visual", 1,
1327 };
1328
1329 static void
1330 add_visuals(struct wlsc_compositor *ec)
1331 {
1332         ec->argb_visual.base.interface = &visual_interface;
1333         ec->argb_visual.base.implementation = NULL;
1334         wl_display_add_object(ec->wl_display, &ec->argb_visual.base);
1335         wl_display_add_global(ec->wl_display, &ec->argb_visual.base, NULL);
1336
1337         ec->premultiplied_argb_visual.base.interface = &visual_interface;
1338         ec->premultiplied_argb_visual.base.implementation = NULL;
1339         wl_display_add_object(ec->wl_display,
1340                               &ec->premultiplied_argb_visual.base);
1341         wl_display_add_global(ec->wl_display,
1342                               &ec->premultiplied_argb_visual.base, NULL);
1343
1344         ec->rgb_visual.base.interface = &visual_interface;
1345         ec->rgb_visual.base.implementation = NULL;
1346         wl_display_add_object(ec->wl_display, &ec->rgb_visual.base);
1347         wl_display_add_global(ec->wl_display, &ec->rgb_visual.base, NULL);
1348 }
1349
1350 void
1351 wlsc_output_init(struct wlsc_output *output, struct wlsc_compositor *c,
1352                  int x, int y, int width, int height)
1353 {
1354         output->compositor = c;
1355         output->x = x;
1356         output->y = y;
1357         output->width = width;
1358         output->height = height;
1359
1360         output->background =
1361                 background_create(output, option_background);
1362
1363         wlsc_matrix_init(&output->matrix);
1364         wlsc_matrix_translate(&output->matrix,
1365                               -output->x - output->width / 2.0,
1366                               -output->y - output->height / 2.0, 0);
1367         wlsc_matrix_scale(&output->matrix,
1368                           2.0 / output->width, 2.0 / output->height, 1);
1369
1370         output->base.interface = &wl_output_interface;
1371         wl_display_add_object(c->wl_display, &output->base);
1372         wl_display_add_global(c->wl_display, &output->base,
1373                               wlsc_output_post_geometry);
1374 }
1375
1376 int
1377 wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
1378 {
1379         struct wl_event_loop *loop;
1380
1381         ec->wl_display = display;
1382
1383         wl_display_set_compositor(display, &ec->base, &compositor_interface);
1384
1385         ec->shell.base.interface = &wl_shell_interface;
1386         ec->shell.base.implementation = (void (**)(void)) &shell_interface;
1387         wl_display_add_object(display, &ec->shell.base);
1388         if (wl_display_add_global(display, &ec->shell.base, NULL))
1389                 return -1;
1390
1391         add_visuals(ec);
1392
1393         wl_list_init(&ec->surface_list);
1394         wl_list_init(&ec->input_device_list);
1395         wl_list_init(&ec->output_list);
1396         wl_list_init(&ec->surface_destroy_listener_list);
1397
1398         create_pointer_images(ec);
1399
1400         screenshooter_create(ec);
1401
1402         glGenFramebuffers(1, &ec->fbo);
1403         glBindFramebuffer(GL_FRAMEBUFFER, ec->fbo);
1404         glActiveTexture(GL_TEXTURE0);
1405         if (init_shaders(ec) < 0)
1406                 return -1;
1407
1408         loop = wl_display_get_event_loop(ec->wl_display);
1409         ec->timer_source = wl_event_loop_add_timer(loop, repaint, ec);
1410         wlsc_compositor_schedule_repaint(ec);
1411
1412         return 0;
1413 }
1414
1415 /* The plan here is to generate a random anonymous socket name and
1416  * advertise that through a service on the session dbus.
1417  */
1418 static const char socket_name[] = "\0wayland";
1419
1420 int main(int argc, char *argv[])
1421 {
1422         struct wl_display *display;
1423         struct wlsc_compositor *ec;
1424         GError *error = NULL;
1425         GOptionContext *context;
1426
1427         g_type_init(); /* GdkPixbuf needs this, it seems. */
1428
1429         context = g_option_context_new(NULL);
1430         g_option_context_add_main_entries(context, option_entries, "Wayland");
1431         if (!g_option_context_parse(context, &argc, &argv, &error)) {
1432                 fprintf(stderr, "option parsing failed: %s\n", error->message);
1433                 exit(EXIT_FAILURE);
1434         }
1435
1436         display = wl_display_create();
1437
1438         if (getenv("DISPLAY"))
1439                 ec = x11_compositor_create(display);
1440         else
1441                 ec = drm_compositor_create(display);
1442
1443         if (ec == NULL) {
1444                 fprintf(stderr, "failed to create compositor\n");
1445                 exit(EXIT_FAILURE);
1446         }
1447
1448         if (wl_display_add_socket(display, socket_name, sizeof socket_name)) {
1449                 fprintf(stderr, "failed to add socket: %m\n");
1450                 exit(EXIT_FAILURE);
1451         }
1452
1453         wl_display_run(display);
1454
1455         return 0;
1456 }