src/compositor-android.c

   1 /*
   2  * Copyright © 2012 Collabora, Ltd.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #define _GNU_SOURCE
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <math.h>
  29 #include <sys/types.h>
  30 #include <dirent.h>
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34
  35 #include <EGL/egl.h>
  36 #include <GLES2/gl2.h>
  37
  38 #include "compositor.h"
  39 #include "android-framebuffer.h"
  40 #include "evdev.h"
  41
  42 struct android_compositor;
  43
  44 struct android_output {
  45         struct android_compositor *compositor;
  46         struct weston_output base;
  47
  48         struct weston_mode mode;
  49         struct android_framebuffer *fb;
  50 };
  51
  52 struct android_seat {
  53         struct weston_seat base;
  54         struct wl_list devices_list;
  55 };
  56
  57 struct android_compositor {
  58         struct weston_compositor base;
  59
  60         struct android_seat *seat;
  61 };
  62
  63 static inline struct android_output *
  64 to_android_output(struct weston_output *base)
  65 {
  66         return container_of(base, struct android_output, base);
  67 }
  68
  69 static inline struct android_seat *
  70 to_android_seat(struct weston_seat *base)
  71 {
  72         return container_of(base, struct android_seat, base);
  73 }
  74
  75 static inline struct android_compositor *
  76 to_android_compositor(struct weston_compositor *base)
  77 {
  78         return container_of(base, struct android_compositor, base);
  79 }
  80
  81 static const char *
  82 egl_error_string(EGLint code)
  83 {
  84 #define MYERRCODE(x) case x: return #x;
  85         switch (code) {
  86         MYERRCODE(EGL_SUCCESS)
  87         MYERRCODE(EGL_NOT_INITIALIZED)
  88         MYERRCODE(EGL_BAD_ACCESS)
  89         MYERRCODE(EGL_BAD_ALLOC)
  90         MYERRCODE(EGL_BAD_ATTRIBUTE)
  91         MYERRCODE(EGL_BAD_CONTEXT)
  92         MYERRCODE(EGL_BAD_CONFIG)
  93         MYERRCODE(EGL_BAD_CURRENT_SURFACE)
  94         MYERRCODE(EGL_BAD_DISPLAY)
  95         MYERRCODE(EGL_BAD_SURFACE)
  96         MYERRCODE(EGL_BAD_MATCH)
  97         MYERRCODE(EGL_BAD_PARAMETER)
  98         MYERRCODE(EGL_BAD_NATIVE_PIXMAP)
  99         MYERRCODE(EGL_BAD_NATIVE_WINDOW)
 100         MYERRCODE(EGL_CONTEXT_LOST)
 101         default:
 102                 return "unknown";
 103         }
 104 #undef MYERRCODE
 105 }
 106
 107 static void
 108 print_egl_error_state(void)
 109 {
 110         EGLint code;
 111
 112         code = eglGetError();
 113         weston_log("EGL error state: %s (0x%04lx)\n",
 114                 egl_error_string(code), (long)code);
 115 }
 116
 117 static void
 118 android_finish_frame(void *data)
 119 {
 120         struct android_output *output = data;
 121
 122         weston_output_finish_frame(&output->base,
 123                                    weston_compositor_get_time());
 124 }
 125
 126 static void
 127 android_output_repaint(struct weston_output *base, pixman_region32_t *damage)
 128 {
 129         struct android_output *output = to_android_output(base);
 130         struct android_compositor *compositor = output->compositor;
 131         struct wl_event_loop *loop;
 132
 133         compositor->base.renderer->repaint_output(&output->base, damage);
 134
 135         /* FIXME: does Android have a way to signal page flip done? */
 136         loop = wl_display_get_event_loop(compositor->base.wl_display);
 137         wl_event_loop_add_idle(loop, android_finish_frame, output);
 138 }
 139
 140 static void
 141 android_output_destroy(struct weston_output *base)
 142 {
 143         struct android_output *output = to_android_output(base);
 144
 145         wl_list_remove(&output->base.link);
 146         weston_output_destroy(&output->base);
 147
 148         android_framebuffer_destroy(output->fb);
 149
 150         free(output);
 151 }
 152
 153 static struct android_output *
 154 android_output_create(struct android_compositor *compositor)
 155 {
 156         struct android_output *output;
 157
 158         output = calloc(1, sizeof *output);
 159         if (!output)
 160                 return NULL;
 161
 162         output->fb = android_framebuffer_create();
 163         if (!output->fb) {
 164                 free(output);
 165                 return NULL;
 166         }
 167
 168         output->compositor = compositor;
 169         return output;
 170 }
 171
 172 static void
 173 android_compositor_add_output(struct android_compositor *compositor,
 174                               struct android_output *output)
 175 {
 176         float mm_width, mm_height;
 177
 178         output->base.repaint = android_output_repaint;
 179         output->base.destroy = android_output_destroy;
 180         output->base.assign_planes = NULL;
 181         output->base.set_backlight = NULL;
 182         output->base.set_dpms = NULL;
 183         output->base.switch_mode = NULL;
 184
 185         /* only one static mode in list */
 186         output->mode.flags =
 187                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 188         output->mode.width = output->fb->width;
 189         output->mode.height = output->fb->height;
 190         output->mode.refresh = ceilf(1000.0f * output->fb->refresh_rate);
 191         wl_list_init(&output->base.mode_list);
 192         wl_list_insert(&output->base.mode_list, &output->mode.link);
 193
 194         output->base.current = &output->mode;
 195         output->base.origin = &output->mode;
 196         output->base.subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
 197         output->base.make = "unknown";
 198         output->base.model = "unknown";
 199
 200         mm_width  = output->fb->width / output->fb->xdpi * 25.4f;
 201         mm_height = output->fb->height / output->fb->ydpi * 25.4f;
 202         weston_output_init(&output->base, &compositor->base,
 203                            0, 0, round(mm_width), round(mm_height),
 204                            WL_OUTPUT_TRANSFORM_NORMAL);
 205         wl_list_insert(compositor->base.output_list.prev, &output->base.link);
 206 }
 207
 208 static void
 209 android_led_update(struct weston_seat *seat_base, enum weston_led leds)
 210 {
 211         struct android_seat *seat = to_android_seat(seat_base);
 212         struct evdev_device *device;
 213
 214         wl_list_for_each(device, &seat->devices_list, link)
 215                 evdev_led_update(device, leds);
 216 }
 217
 218 static void
 219 android_seat_open_device(struct android_seat *seat, const char *devnode)
 220 {
 221         struct evdev_device *device;
 222         int fd;
 223
 224         /* XXX: check the Android excluded list */
 225
 226         fd = open(devnode, O_RDWR | O_NONBLOCK | O_CLOEXEC);
 227         if (fd < 0) {
 228                 weston_log_continue("opening '%s' failed: %s\n", devnode,
 229                                     strerror(errno));
 230                 return;
 231         }
 232
 233         device = evdev_device_create(&seat->base, devnode, fd);
 234         if (!device) {
 235                 close(fd);
 236                 return;
 237         }
 238
 239         wl_list_insert(seat->devices_list.prev, &device->link);
 240 }
 241
 242 static int
 243 is_dot_or_dotdot(const char *str)
 244 {
 245         return (str[0] == '.' &&
 246                 (str[1] == 0 || (str[1] == '.' && str[2] == 0)));
 247 }
 248
 249 static void
 250 android_seat_scan_devices(struct android_seat *seat, const char *dirpath)
 251 {
 252         int ret;
 253         DIR *dir;
 254         struct dirent *dent;
 255         char *devnode = NULL;
 256
 257         dir = opendir(dirpath);
 258         if (!dir) {
 259                 weston_log("Could not open input device directory '%s': %s\n",
 260                            dirpath, strerror(errno));
 261                 return;
 262         }
 263
 264         while ((dent = readdir(dir)) != NULL) {
 265                 if (is_dot_or_dotdot(dent->d_name))
 266                         continue;
 267
 268                 ret = asprintf(&devnode, "%s/%s", dirpath, dent->d_name);
 269                 if (ret < 0)
 270                         continue;
 271
 272                 android_seat_open_device(seat, devnode);
 273                 free(devnode);
 274         }
 275
 276         closedir(dir);
 277 }
 278
 279 static void
 280 android_seat_destroy(struct android_seat *seat)
 281 {
 282         struct evdev_device *device, *next;
 283
 284         wl_list_for_each_safe(device, next, &seat->devices_list, link)
 285                 evdev_device_destroy(device);
 286
 287         if (seat->base.seat.keyboard)
 288                 notify_keyboard_focus_out(&seat->base);
 289
 290         weston_seat_release(&seat->base);
 291         free(seat);
 292 }
 293
 294 static struct android_seat *
 295 android_seat_create(struct android_compositor *compositor)
 296 {
 297         struct android_seat *seat;
 298
 299         seat = calloc(1, sizeof *seat);
 300         if (!seat)
 301                 return NULL;
 302
 303         weston_seat_init(&seat->base, &compositor->base);
 304         seat->base.led_update = android_led_update;
 305         wl_list_init(&seat->devices_list);
 306
 307         android_seat_scan_devices(seat, "/dev/input");
 308
 309         evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
 310
 311         if (wl_list_empty(&seat->devices_list))
 312                 weston_log("Warning: no input devices found.\n");
 313
 314         /* XXX: implement hotplug support */
 315
 316         return seat;
 317 }
 318
 319 static int
 320 android_egl_choose_config(struct android_compositor *compositor,
 321                           struct android_framebuffer *fb,
 322                           const EGLint *attribs)
 323 {
 324         EGLBoolean ret;
 325         EGLint count = 0;
 326         EGLint matched = 0;
 327         EGLConfig *configs;
 328         int i;
 329
 330         /*
 331          * The logic is copied from Android frameworks/base/services/
 332          * surfaceflinger/DisplayHardware/DisplayHardware.cpp
 333          */
 334
 335         compositor->base.egl_config = NULL;
 336
 337         ret = eglGetConfigs(compositor->base.egl_display, NULL, 0, &count);
 338         if (ret == EGL_FALSE || count < 1)
 339                 return -1;
 340
 341         configs = calloc(count, sizeof *configs);
 342         if (!configs)
 343                 return -1;
 344
 345         ret = eglChooseConfig(compositor->base.egl_display, attribs, configs,
 346                               count, &matched);
 347         if (ret == EGL_FALSE || matched < 1)
 348                 goto out;
 349
 350         for (i = 0; i < matched; ++i) {
 351                 EGLint id;
 352                 ret = eglGetConfigAttrib(compositor->base.egl_display,
 353                                          configs[i], EGL_NATIVE_VISUAL_ID,
 354                                          &id);
 355                 if (ret == EGL_FALSE)
 356                         continue;
 357                 if (id > 0 && fb->format == id) {
 358                         compositor->base.egl_config = configs[i];
 359                         break;
 360                 }
 361         }
 362
 363 out:
 364         free(configs);
 365         if (!compositor->base.egl_config)
 366                 return -1;
 367
 368         return 0;
 369 }
 370
 371 static int
 372 android_init_egl(struct android_compositor *compositor,
 373                  struct android_output *output)
 374 {
 375         EGLint eglmajor, eglminor;
 376         int ret;
 377
 378         static const EGLint config_attrs[] = {
 379                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 380                 EGL_RED_SIZE, 1,
 381                 EGL_GREEN_SIZE, 1,
 382                 EGL_BLUE_SIZE, 1,
 383                 EGL_ALPHA_SIZE, 0,
 384                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 385                 EGL_NONE
 386         };
 387
 388         compositor->base.egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 389         if (compositor->base.egl_display == EGL_NO_DISPLAY) {
 390                 weston_log("Failed to create EGL display.\n");
 391                 print_egl_error_state();
 392                 return -1;
 393         }
 394
 395         ret = eglInitialize(compositor->base.egl_display, &eglmajor, &eglminor);
 396         if (!ret) {
 397                 weston_log("Failed to initialise EGL.\n");
 398                 print_egl_error_state();
 399                 return -1;
 400         }
 401
 402         ret = android_egl_choose_config(compositor, output->fb, config_attrs);
 403         if (ret < 0) {
 404                 weston_log("Failed to find an EGL config.\n");
 405                 print_egl_error_state();
 406                 return -1;
 407         }
 408
 409         output->base.egl_surface =
 410                 eglCreateWindowSurface(compositor->base.egl_display,
 411                                        compositor->base.egl_config,
 412                                        output->fb->native_window,
 413                                        NULL);
 414         if (output->base.egl_surface == EGL_NO_SURFACE) {
 415                 weston_log("Failed to create FB EGLSurface.\n");
 416                 print_egl_error_state();
 417                 return -1;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static void
 424 android_fini_egl(struct android_compositor *compositor)
 425 {
 426         gles2_renderer_destroy(&compositor->base);
 427
 428         eglMakeCurrent(compositor->base.egl_display,
 429                        EGL_NO_SURFACE, EGL_NO_SURFACE,
 430                        EGL_NO_CONTEXT);
 431
 432         eglTerminate(compositor->base.egl_display);
 433         eglReleaseThread();
 434 }
 435
 436 static void
 437 android_compositor_destroy(struct weston_compositor *base)
 438 {
 439         struct android_compositor *compositor = to_android_compositor(base);
 440
 441         android_seat_destroy(compositor->seat);
 442
 443         /* destroys outputs, too */
 444         weston_compositor_shutdown(&compositor->base);
 445
 446         android_fini_egl(compositor);
 447
 448         free(compositor);
 449 }
 450
 451 static struct weston_compositor *
 452 android_compositor_create(struct wl_display *display, int argc, char *argv[],
 453                           const char *config_file)
 454 {
 455         struct android_compositor *compositor;
 456         struct android_output *output;
 457
 458         weston_log("initializing android backend\n");
 459
 460         compositor = calloc(1, sizeof *compositor);
 461         if (compositor == NULL)
 462                 return NULL;
 463
 464         if (weston_compositor_init(&compositor->base, display, argc, argv,
 465                                    config_file) < 0)
 466                 goto err_free;
 467
 468         compositor->base.destroy = android_compositor_destroy;
 469
 470         compositor->base.focus = 1;
 471
 472         output = android_output_create(compositor);
 473         if (!output)
 474                 goto err_compositor;
 475
 476         if (android_init_egl(compositor, output) < 0)
 477                 goto err_output;
 478
 479         android_compositor_add_output(compositor, output);
 480
 481         if (gles2_renderer_init(&compositor->base) < 0)
 482                 goto err_egl;
 483
 484         compositor->seat = android_seat_create(compositor);
 485         if (!compositor->seat)
 486                 goto err_egl;
 487
 488         return &compositor->base;
 489
 490 err_egl:
 491         android_fini_egl(compositor);
 492 err_output:
 493         android_output_destroy(&output->base);
 494 err_compositor:
 495         weston_compositor_shutdown(&compositor->base);
 496 err_free:
 497         free(compositor);
 498         return NULL;
 499 }
 500
 501 WL_EXPORT struct weston_compositor *
 502 backend_init(struct wl_display *display, int argc, char *argv[],
 503              const char *config_file)
 504 {
 505         return android_compositor_create(display, argc, argv, config_file);
 506 }