clients/simple-egl.c

   1 /*
   2  * Copyright © 2011 Benjamin Franzke
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <stdbool.h>
  27 #include <math.h>
  28 #include <assert.h>
  29 #include <signal.h>
  30
  31 #include <linux/input.h>
  32
  33 #include <wayland-client.h>
  34 #include <wayland-egl.h>
  35 #include <wayland-cursor.h>
  36
  37 #include <GLES2/gl2.h>
  38 #include <EGL/egl.h>
  39 #include <EGL/eglext.h>
  40
  41 #ifndef EGL_EXT_swap_buffers_with_damage
  42 #define EGL_EXT_swap_buffers_with_damage 1
  43 typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)(EGLDisplay dpy, EGLSurface surface, EGLint *rects, EGLint n_rects);
  44 #endif
  45
  46 #ifndef EGL_EXT_buffer_age
  47 #define EGL_EXT_buffer_age 1
  48 #define EGL_BUFFER_AGE_EXT                      0x313D
  49 #endif
  50
  51 struct window;
  52 struct seat;
  53
  54 struct display {
  55         struct wl_display *display;
  56         struct wl_registry *registry;
  57         struct wl_compositor *compositor;
  58         struct wl_shell *shell;
  59         struct wl_seat *seat;
  60         struct wl_pointer *pointer;
  61         struct wl_touch *touch;
  62         struct wl_keyboard *keyboard;
  63         struct wl_shm *shm;
  64         struct wl_cursor_theme *cursor_theme;
  65         struct wl_cursor *default_cursor;
  66         struct wl_surface *cursor_surface;
  67         struct {
  68                 EGLDisplay dpy;
  69                 EGLContext ctx;
  70                 EGLConfig conf;
  71         } egl;
  72         struct window *window;
  73
  74         PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC swap_buffers_with_damage;
  75 };
  76
  77 struct geometry {
  78         int width, height;
  79 };
  80
  81 struct window {
  82         struct display *display;
  83         struct geometry geometry, window_size;
  84         struct {
  85                 GLuint rotation_uniform;
  86                 GLuint pos;
  87                 GLuint col;
  88         } gl;
  89
  90         struct wl_egl_window *native;
  91         struct wl_surface *surface;
  92         struct wl_shell_surface *shell_surface;
  93         EGLSurface egl_surface;
  94         struct wl_callback *callback;
  95         int fullscreen, configured, opaque, buffer_size;
  96 };
  97
  98 static const char *vert_shader_text =
  99         "uniform mat4 rotation;\n"
 100         "attribute vec4 pos;\n"
 101         "attribute vec4 color;\n"
 102         "varying vec4 v_color;\n"
 103         "void main() {\n"
 104         "  gl_Position = rotation * pos;\n"
 105         "  v_color = color;\n"
 106         "}\n";
 107
 108 static const char *frag_shader_text =
 109         "precision mediump float;\n"
 110         "varying vec4 v_color;\n"
 111         "void main() {\n"
 112         "  gl_FragColor = v_color;\n"
 113         "}\n";
 114
 115 static int running = 1;
 116
 117 static void
 118 init_egl(struct display *display, struct window *window)
 119 {
 120         static const EGLint context_attribs[] = {
 121                 EGL_CONTEXT_CLIENT_VERSION, 2,
 122                 EGL_NONE
 123         };
 124         const char *extensions;
 125
 126         EGLint config_attribs[] = {
 127                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 128                 EGL_RED_SIZE, 1,
 129                 EGL_GREEN_SIZE, 1,
 130                 EGL_BLUE_SIZE, 1,
 131                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 132                 EGL_NONE
 133         };
 134
 135         EGLint major, minor, n, count, i, size;
 136         EGLConfig *configs;
 137         EGLBoolean ret;
 138
 139         if (window->opaque || window->buffer_size == 16)
 140                 config_attribs[9] = 0;
 141
 142         display->egl.dpy = eglGetDisplay(display->display);
 143         assert(display->egl.dpy);
 144
 145         ret = eglInitialize(display->egl.dpy, &major, &minor);
 146         assert(ret == EGL_TRUE);
 147         ret = eglBindAPI(EGL_OPENGL_ES_API);
 148         assert(ret == EGL_TRUE);
 149
 150         if (!eglGetConfigs(display->egl.dpy, NULL, 0, &count) || count < 1)
 151                 assert(0);
 152
 153         configs = calloc(count, sizeof *configs);
 154         assert(configs);
 155
 156         ret = eglChooseConfig(display->egl.dpy, config_attribs,
 157                               configs, count, &n);
 158         assert(ret && n >= 1);
 159
 160         for (i = 0; i < n; i++) {
 161                 eglGetConfigAttrib(display->egl.dpy,
 162                                    configs[i], EGL_BUFFER_SIZE, &size);
 163                 if (window->buffer_size == size) {
 164                         display->egl.conf = configs[i];
 165                         break;
 166                 }
 167         }
 168         free(configs);
 169         if (display->egl.conf == NULL) {
 170                 fprintf(stderr, "did not find config with buffer size %d\n",
 171                         window->buffer_size);
 172                 exit(EXIT_FAILURE);
 173         }
 174
 175         display->egl.ctx = eglCreateContext(display->egl.dpy,
 176                                             display->egl.conf,
 177                                             EGL_NO_CONTEXT, context_attribs);
 178         assert(display->egl.ctx);
 179
 180         display->swap_buffers_with_damage = NULL;
 181         extensions = eglQueryString(display->egl.dpy, EGL_EXTENSIONS);
 182         if (extensions &&
 183             strstr(extensions, "EGL_EXT_swap_buffers_with_damage") &&
 184             strstr(extensions, "EGL_EXT_buffer_age"))
 185                 display->swap_buffers_with_damage =
 186                         (PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)
 187                         eglGetProcAddress("eglSwapBuffersWithDamageEXT");
 188
 189         if (display->swap_buffers_with_damage)
 190                 printf("has EGL_EXT_buffer_age and EGL_EXT_swap_buffers_with_damage\n");
 191
 192 }
 193
 194 static void
 195 fini_egl(struct display *display)
 196 {
 197         eglTerminate(display->egl.dpy);
 198         eglReleaseThread();
 199 }
 200
 201 static GLuint
 202 create_shader(struct window *window, const char *source, GLenum shader_type)
 203 {
 204         GLuint shader;
 205         GLint status;
 206
 207         shader = glCreateShader(shader_type);
 208         assert(shader != 0);
 209
 210         glShaderSource(shader, 1, (const char **) &source, NULL);
 211         glCompileShader(shader);
 212
 213         glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
 214         if (!status) {
 215                 char log[1000];
 216                 GLsizei len;
 217                 glGetShaderInfoLog(shader, 1000, &len, log);
 218                 fprintf(stderr, "Error: compiling %s: %*s\n",
 219                         shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
 220                         len, log);
 221                 exit(1);
 222         }
 223
 224         return shader;
 225 }
 226
 227 static void
 228 init_gl(struct window *window)
 229 {
 230         GLuint frag, vert;
 231         GLuint program;
 232         GLint status;
 233
 234         frag = create_shader(window, frag_shader_text, GL_FRAGMENT_SHADER);
 235         vert = create_shader(window, vert_shader_text, GL_VERTEX_SHADER);
 236
 237         program = glCreateProgram();
 238         glAttachShader(program, frag);
 239         glAttachShader(program, vert);
 240         glLinkProgram(program);
 241
 242         glGetProgramiv(program, GL_LINK_STATUS, &status);
 243         if (!status) {
 244                 char log[1000];
 245                 GLsizei len;
 246                 glGetProgramInfoLog(program, 1000, &len, log);
 247                 fprintf(stderr, "Error: linking:\n%*s\n", len, log);
 248                 exit(1);
 249         }
 250
 251         glUseProgram(program);
 252
 253         window->gl.pos = 0;
 254         window->gl.col = 1;
 255
 256         glBindAttribLocation(program, window->gl.pos, "pos");
 257         glBindAttribLocation(program, window->gl.col, "color");
 258         glLinkProgram(program);
 259
 260         window->gl.rotation_uniform =
 261                 glGetUniformLocation(program, "rotation");
 262 }
 263
 264 static void
 265 handle_ping(void *data, struct wl_shell_surface *shell_surface,
 266             uint32_t serial)
 267 {
 268         wl_shell_surface_pong(shell_surface, serial);
 269 }
 270
 271 static void
 272 handle_configure(void *data, struct wl_shell_surface *shell_surface,
 273                  uint32_t edges, int32_t width, int32_t height)
 274 {
 275         struct window *window = data;
 276
 277         if (window->native)
 278                 wl_egl_window_resize(window->native, width, height, 0, 0);
 279
 280         window->geometry.width = width;
 281         window->geometry.height = height;
 282
 283         if (!window->fullscreen)
 284                 window->window_size = window->geometry;
 285 }
 286
 287 static void
 288 handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
 289 {
 290 }
 291
 292 static const struct wl_shell_surface_listener shell_surface_listener = {
 293         handle_ping,
 294         handle_configure,
 295         handle_popup_done
 296 };
 297
 298 static void
 299 redraw(void *data, struct wl_callback *callback, uint32_t time);
 300
 301 static void
 302 configure_callback(void *data, struct wl_callback *callback, uint32_t  time)
 303 {
 304         struct window *window = data;
 305
 306         wl_callback_destroy(callback);
 307
 308         window->configured = 1;
 309
 310         if (window->callback == NULL)
 311                 redraw(data, NULL, time);
 312 }
 313
 314 static struct wl_callback_listener configure_callback_listener = {
 315         configure_callback,
 316 };
 317
 318 static void
 319 toggle_fullscreen(struct window *window, int fullscreen)
 320 {
 321         struct wl_callback *callback;
 322
 323         window->fullscreen = fullscreen;
 324         window->configured = 0;
 325
 326         if (fullscreen) {
 327                 wl_shell_surface_set_fullscreen(window->shell_surface,
 328                                                 WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
 329                                                 0, NULL);
 330         } else {
 331                 wl_shell_surface_set_toplevel(window->shell_surface);
 332                 handle_configure(window, window->shell_surface, 0,
 333                                  window->window_size.width,
 334                                  window->window_size.height);
 335         }
 336
 337         callback = wl_display_sync(window->display->display);
 338         wl_callback_add_listener(callback, &configure_callback_listener,
 339                                  window);
 340 }
 341
 342 static void
 343 create_surface(struct window *window)
 344 {
 345         struct display *display = window->display;
 346         EGLBoolean ret;
 347
 348         window->surface = wl_compositor_create_surface(display->compositor);
 349         window->shell_surface = wl_shell_get_shell_surface(display->shell,
 350                                                            window->surface);
 351
 352         wl_shell_surface_add_listener(window->shell_surface,
 353                                       &shell_surface_listener, window);
 354
 355         window->native =
 356                 wl_egl_window_create(window->surface,
 357                                      window->window_size.width,
 358                                      window->window_size.height);
 359         window->egl_surface =
 360                 eglCreateWindowSurface(display->egl.dpy,
 361                                        display->egl.conf,
 362                                        window->native, NULL);
 363
 364         wl_shell_surface_set_title(window->shell_surface, "simple-egl");
 365
 366         ret = eglMakeCurrent(window->display->egl.dpy, window->egl_surface,
 367                              window->egl_surface, window->display->egl.ctx);
 368         assert(ret == EGL_TRUE);
 369
 370         toggle_fullscreen(window, window->fullscreen);
 371 }
 372
 373 static void
 374 destroy_surface(struct window *window)
 375 {
 376         /* Required, otherwise segfault in egl_dri2.c: dri2_make_current()
 377          * on eglReleaseThread(). */
 378         eglMakeCurrent(window->display->egl.dpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
 379                        EGL_NO_CONTEXT);
 380
 381         eglDestroySurface(window->display->egl.dpy, window->egl_surface);
 382         wl_egl_window_destroy(window->native);
 383
 384         wl_shell_surface_destroy(window->shell_surface);
 385         wl_surface_destroy(window->surface);
 386
 387         if (window->callback)
 388                 wl_callback_destroy(window->callback);
 389 }
 390
 391 static const struct wl_callback_listener frame_listener;
 392
 393 static void
 394 redraw(void *data, struct wl_callback *callback, uint32_t time)
 395 {
 396         struct window *window = data;
 397         struct display *display = window->display;
 398         static const GLfloat verts[3][2] = {
 399                 { -0.5, -0.5 },
 400                 {  0.5, -0.5 },
 401                 {  0,    0.5 }
 402         };
 403         static const GLfloat colors[3][3] = {
 404                 { 1, 0, 0 },
 405                 { 0, 1, 0 },
 406                 { 0, 0, 1 }
 407         };
 408         GLfloat angle;
 409         GLfloat rotation[4][4] = {
 410                 { 1, 0, 0, 0 },
 411                 { 0, 1, 0, 0 },
 412                 { 0, 0, 1, 0 },
 413                 { 0, 0, 0, 1 }
 414         };
 415         static const int32_t speed_div = 5;
 416         static uint32_t start_time = 0;
 417         struct wl_region *region;
 418         EGLint rect[4];
 419         EGLint buffer_age = 0;
 420
 421         assert(window->callback == callback);
 422         window->callback = NULL;
 423
 424         if (callback)
 425                 wl_callback_destroy(callback);
 426
 427         if (!window->configured)
 428                 return;
 429
 430         if (start_time == 0)
 431                 start_time = time;
 432
 433         angle = ((time-start_time) / speed_div) % 360 * M_PI / 180.0;
 434         rotation[0][0] =  cos(angle);
 435         rotation[0][2] =  sin(angle);
 436         rotation[2][0] = -sin(angle);
 437         rotation[2][2] =  cos(angle);
 438
 439         if (display->swap_buffers_with_damage)
 440                 eglQuerySurface(display->egl.dpy, window->egl_surface,
 441                                 EGL_BUFFER_AGE_EXT, &buffer_age);
 442
 443         glViewport(0, 0, window->geometry.width, window->geometry.height);
 444
 445         glUniformMatrix4fv(window->gl.rotation_uniform, 1, GL_FALSE,
 446                            (GLfloat *) rotation);
 447
 448         glClearColor(0.0, 0.0, 0.0, 0.5);
 449         glClear(GL_COLOR_BUFFER_BIT);
 450
 451         glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
 452         glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors);
 453         glEnableVertexAttribArray(window->gl.pos);
 454         glEnableVertexAttribArray(window->gl.col);
 455
 456         glDrawArrays(GL_TRIANGLES, 0, 3);
 457
 458         glDisableVertexAttribArray(window->gl.pos);
 459         glDisableVertexAttribArray(window->gl.col);
 460
 461         if (window->opaque || window->fullscreen) {
 462                 region = wl_compositor_create_region(window->display->compositor);
 463                 wl_region_add(region, 0, 0,
 464                               window->geometry.width,
 465                               window->geometry.height);
 466                 wl_surface_set_opaque_region(window->surface, region);
 467                 wl_region_destroy(region);
 468         } else {
 469                 wl_surface_set_opaque_region(window->surface, NULL);
 470         }
 471
 472         window->callback = wl_surface_frame(window->surface);
 473         wl_callback_add_listener(window->callback, &frame_listener, window);
 474
 475         if (display->swap_buffers_with_damage && buffer_age > 0) {
 476                 rect[0] = window->geometry.width / 4 - 1;
 477                 rect[1] = window->geometry.height / 4 - 1;
 478                 rect[2] = window->geometry.width / 2 + 2;
 479                 rect[3] = window->geometry.height / 2 + 2;
 480                 display->swap_buffers_with_damage(display->egl.dpy,
 481                                                   window->egl_surface,
 482                                                   rect, 1);
 483         } else {
 484                 eglSwapBuffers(display->egl.dpy, window->egl_surface);
 485         }
 486 }
 487
 488 static const struct wl_callback_listener frame_listener = {
 489         redraw
 490 };
 491
 492 static void
 493 pointer_handle_enter(void *data, struct wl_pointer *pointer,
 494                      uint32_t serial, struct wl_surface *surface,
 495                      wl_fixed_t sx, wl_fixed_t sy)
 496 {
 497         struct display *display = data;
 498         struct wl_buffer *buffer;
 499         struct wl_cursor *cursor = display->default_cursor;
 500         struct wl_cursor_image *image;
 501
 502         if (display->window->fullscreen)
 503                 wl_pointer_set_cursor(pointer, serial, NULL, 0, 0);
 504         else if (cursor) {
 505                 image = display->default_cursor->images[0];
 506                 buffer = wl_cursor_image_get_buffer(image);
 507                 wl_pointer_set_cursor(pointer, serial,
 508                                       display->cursor_surface,
 509                                       image->hotspot_x,
 510                                       image->hotspot_y);
 511                 wl_surface_attach(display->cursor_surface, buffer, 0, 0);
 512                 wl_surface_damage(display->cursor_surface, 0, 0,
 513                                   image->width, image->height);
 514                 wl_surface_commit(display->cursor_surface);
 515         }
 516 }
 517
 518 static void
 519 pointer_handle_leave(void *data, struct wl_pointer *pointer,
 520                      uint32_t serial, struct wl_surface *surface)
 521 {
 522 }
 523
 524 static void
 525 pointer_handle_motion(void *data, struct wl_pointer *pointer,
 526                       uint32_t time, wl_fixed_t sx, wl_fixed_t sy)
 527 {
 528 }
 529
 530 static void
 531 pointer_handle_button(void *data, struct wl_pointer *wl_pointer,
 532                       uint32_t serial, uint32_t time, uint32_t button,
 533                       uint32_t state)
 534 {
 535         struct display *display = data;
 536
 537         if (button == BTN_LEFT && state == WL_POINTER_BUTTON_STATE_PRESSED)
 538                 wl_shell_surface_move(display->window->shell_surface,
 539                                       display->seat, serial);
 540 }
 541
 542 static void
 543 pointer_handle_axis(void *data, struct wl_pointer *wl_pointer,
 544                     uint32_t time, uint32_t axis, wl_fixed_t value)
 545 {
 546 }
 547
 548 static const struct wl_pointer_listener pointer_listener = {
 549         pointer_handle_enter,
 550         pointer_handle_leave,
 551         pointer_handle_motion,
 552         pointer_handle_button,
 553         pointer_handle_axis,
 554 };
 555
 556 static void
 557 touch_handle_down(void *data, struct wl_touch *wl_touch,
 558                   uint32_t serial, uint32_t time, struct wl_surface *surface,
 559                   int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
 560 {
 561         struct display *d = (struct display *)data;
 562
 563         wl_shell_surface_move(d->window->shell_surface, d->seat, serial);
 564 }
 565
 566 static void
 567 touch_handle_up(void *data, struct wl_touch *wl_touch,
 568                 uint32_t serial, uint32_t time, int32_t id)
 569 {
 570 }
 571
 572 static void
 573 touch_handle_motion(void *data, struct wl_touch *wl_touch,
 574                     uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
 575 {
 576 }
 577
 578 static void
 579 touch_handle_frame(void *data, struct wl_touch *wl_touch)
 580 {
 581 }
 582
 583 static void
 584 touch_handle_cancel(void *data, struct wl_touch *wl_touch)
 585 {
 586 }
 587
 588 static const struct wl_touch_listener touch_listener = {
 589         touch_handle_down,
 590         touch_handle_up,
 591         touch_handle_motion,
 592         touch_handle_frame,
 593         touch_handle_cancel,
 594 };
 595
 596 static void
 597 keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard,
 598                        uint32_t format, int fd, uint32_t size)
 599 {
 600 }
 601
 602 static void
 603 keyboard_handle_enter(void *data, struct wl_keyboard *keyboard,
 604                       uint32_t serial, struct wl_surface *surface,
 605                       struct wl_array *keys)
 606 {
 607 }
 608
 609 static void
 610 keyboard_handle_leave(void *data, struct wl_keyboard *keyboard,
 611                       uint32_t serial, struct wl_surface *surface)
 612 {
 613 }
 614
 615 static void
 616 keyboard_handle_key(void *data, struct wl_keyboard *keyboard,
 617                     uint32_t serial, uint32_t time, uint32_t key,
 618                     uint32_t state)
 619 {
 620         struct display *d = data;
 621
 622         if (key == KEY_F11 && state)
 623                 toggle_fullscreen(d->window, d->window->fullscreen ^ 1);
 624         else if (key == KEY_ESC && state)
 625                 running = 0;
 626 }
 627
 628 static void
 629 keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 630                           uint32_t serial, uint32_t mods_depressed,
 631                           uint32_t mods_latched, uint32_t mods_locked,
 632                           uint32_t group)
 633 {
 634 }
 635
 636 static const struct wl_keyboard_listener keyboard_listener = {
 637         keyboard_handle_keymap,
 638         keyboard_handle_enter,
 639         keyboard_handle_leave,
 640         keyboard_handle_key,
 641         keyboard_handle_modifiers,
 642 };
 643
 644 static void
 645 seat_handle_capabilities(void *data, struct wl_seat *seat,
 646                          enum wl_seat_capability caps)
 647 {
 648         struct display *d = data;
 649
 650         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !d->pointer) {
 651                 d->pointer = wl_seat_get_pointer(seat);
 652                 wl_pointer_add_listener(d->pointer, &pointer_listener, d);
 653         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && d->pointer) {
 654                 wl_pointer_destroy(d->pointer);
 655                 d->pointer = NULL;
 656         }
 657
 658         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !d->keyboard) {
 659                 d->keyboard = wl_seat_get_keyboard(seat);
 660                 wl_keyboard_add_listener(d->keyboard, &keyboard_listener, d);
 661         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && d->keyboard) {
 662                 wl_keyboard_destroy(d->keyboard);
 663                 d->keyboard = NULL;
 664         }
 665
 666         if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !d->touch) {
 667                 d->touch = wl_seat_get_touch(seat);
 668                 wl_touch_set_user_data(d->touch, d);
 669                 wl_touch_add_listener(d->touch, &touch_listener, d);
 670         } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && d->touch) {
 671                 wl_touch_destroy(d->touch);
 672                 d->touch = NULL;
 673         }
 674 }
 675
 676 static const struct wl_seat_listener seat_listener = {
 677         seat_handle_capabilities,
 678 };
 679
 680 static void
 681 registry_handle_global(void *data, struct wl_registry *registry,
 682                        uint32_t name, const char *interface, uint32_t version)
 683 {
 684         struct display *d = data;
 685
 686         if (strcmp(interface, "wl_compositor") == 0) {
 687                 d->compositor =
 688                         wl_registry_bind(registry, name,
 689                                          &wl_compositor_interface, 1);
 690         } else if (strcmp(interface, "wl_shell") == 0) {
 691                 d->shell = wl_registry_bind(registry, name,
 692                                             &wl_shell_interface, 1);
 693         } else if (strcmp(interface, "wl_seat") == 0) {
 694                 d->seat = wl_registry_bind(registry, name,
 695                                            &wl_seat_interface, 1);
 696                 wl_seat_add_listener(d->seat, &seat_listener, d);
 697         } else if (strcmp(interface, "wl_shm") == 0) {
 698                 d->shm = wl_registry_bind(registry, name,
 699                                           &wl_shm_interface, 1);
 700                 d->cursor_theme = wl_cursor_theme_load(NULL, 32, d->shm);
 701                 d->default_cursor =
 702                         wl_cursor_theme_get_cursor(d->cursor_theme, "left_ptr");
 703         }
 704 }
 705
 706 static void
 707 registry_handle_global_remove(void *data, struct wl_registry *registry,
 708                               uint32_t name)
 709 {
 710 }
 711
 712 static const struct wl_registry_listener registry_listener = {
 713         registry_handle_global,
 714         registry_handle_global_remove
 715 };
 716
 717 static void
 718 signal_int(int signum)
 719 {
 720         running = 0;
 721 }
 722
 723 static void
 724 usage(int error_code)
 725 {
 726         fprintf(stderr, "Usage: simple-egl [OPTIONS]\n\n"
 727                 "  -f\tRun in fullscreen mode\n"
 728                 "  -o\tCreate an opaque surface\n"
 729                 "  -s\tUse a 16 bpp EGL config\n"
 730                 "  -h\tThis help text\n\n");
 731
 732         exit(error_code);
 733 }
 734
 735 int
 736 main(int argc, char **argv)
 737 {
 738         struct sigaction sigint;
 739         struct display display = { 0 };
 740         struct window  window  = { 0 };
 741         int i, ret = 0;
 742
 743         window.display = &display;
 744         display.window = &window;
 745         window.window_size.width  = 250;
 746         window.window_size.height = 250;
 747         window.buffer_size = 32;
 748
 749         for (i = 1; i < argc; i++) {
 750                 if (strcmp("-f", argv[i]) == 0)
 751                         window.fullscreen = 1;
 752                 else if (strcmp("-o", argv[i]) == 0)
 753                         window.opaque = 1;
 754                 else if (strcmp("-s", argv[i]) == 0)
 755                         window.buffer_size = 16;
 756                 else if (strcmp("-h", argv[i]) == 0)
 757                         usage(EXIT_SUCCESS);
 758                 else
 759                         usage(EXIT_FAILURE);
 760         }
 761
 762         display.display = wl_display_connect(NULL);
 763         assert(display.display);
 764
 765         display.registry = wl_display_get_registry(display.display);
 766         wl_registry_add_listener(display.registry,
 767                                  &registry_listener, &display);
 768
 769         wl_display_dispatch(display.display);
 770
 771         init_egl(&display, &window);
 772         create_surface(&window);
 773         init_gl(&window);
 774
 775         display.cursor_surface =
 776                 wl_compositor_create_surface(display.compositor);
 777
 778         sigint.sa_handler = signal_int;
 779         sigemptyset(&sigint.sa_mask);
 780         sigint.sa_flags = SA_RESETHAND;
 781         sigaction(SIGINT, &sigint, NULL);
 782
 783         while (running && ret != -1)
 784                 ret = wl_display_dispatch(display.display);
 785
 786         fprintf(stderr, "simple-egl exiting\n");
 787
 788         destroy_surface(&window);
 789         fini_egl(&display);
 790
 791         wl_surface_destroy(display.cursor_surface);
 792         if (display.cursor_theme)
 793                 wl_cursor_theme_destroy(display.cursor_theme);
 794
 795         if (display.shell)
 796                 wl_shell_destroy(display.shell);
 797
 798         if (display.compositor)
 799                 wl_compositor_destroy(display.compositor);
 800
 801         wl_registry_destroy(display.registry);
 802         wl_display_flush(display.display);
 803         wl_display_disconnect(display.display);
 804
 805         return 0;
 806 }