src/image-load.cc

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "image-load.h"
  23
  24 #include <fcntl.h>
  25 #include <sys/mman.h>
  26 #include <sys/stat.h>
  27 #include <unistd.h>
  28
  29 #include <cstring>
  30
  31 #include <config.h>
  32
  33 #include "debug.h"
  34 #include "exif.h"
  35 #include "filedata.h"
  36 #include "gq-marshal.h"
  37 #include "image-load-collection.h"
  38 #include "image-load-dds.h"
  39 #if HAVE_DJVU
  40 #  include "image-load-djvu.h"
  41 #endif
  42 #include "image-load-external.h"
  43 #if HAVE_FFMPEGTHUMBNAILER
  44 #  include "image-load-ffmpegthumbnailer.h"
  45 #endif
  46 #include "image-load-gdk.h"
  47 #if HAVE_HEIF
  48 #  include "image-load-heif.h"
  49 #endif
  50 #if HAVE_J2K
  51 #  include "image-load-j2k.h"
  52 #endif
  53 #if HAVE_JPEG
  54 #  if !HAVE_RAW
  55 #    include "image-load-cr3.h"
  56 #  endif
  57 #  include "image-load-jpeg.h"
  58 #endif
  59 #if HAVE_JPEGXL
  60 #  include "image-load-jpegxl.h"
  61 #endif
  62 #include "image-load-libraw.h"
  63 #if HAVE_PDF
  64 #  include "image-load-pdf.h"
  65 #endif
  66 #include "image-load-psd.h"
  67 #include "image-load-svgz.h"
  68 #if HAVE_TIFF
  69 #  include "image-load-tiff.h"
  70 #endif
  71 #include "image-load-webp.h"
  72 #include "image-load-zxscr.h"
  73 #include "misc.h"
  74 #include "options.h"
  75 #include "typedefs.h"
  76 #include "ui-fileops.h"
  77
  78 struct ExifData;
  79
  80 enum {
  81         IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT =         4096,
  82         IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT =     1
  83 };
  84
  85 /* image loader class */
  86
  87
  88 enum {
  89         SIGNAL_AREA_READY = 0,
  90         SIGNAL_ERROR,
  91         SIGNAL_DONE,
  92         SIGNAL_PERCENT,
  93         SIGNAL_SIZE,
  94         SIGNAL_COUNT
  95 };
  96
  97 static guint signals[SIGNAL_COUNT] = { 0 };
  98
  99 static void image_loader_init(GTypeInstance *instance, gpointer g_class);
 100 static void image_loader_class_init_wrapper(void *data, void *user_data);
 101 static void image_loader_class_init(ImageLoaderClass *loader_class);
 102 static void image_loader_finalize(GObject *object);
 103 static void image_loader_stop(ImageLoader *il);
 104
 105 GType image_loader_get_type()
 106 {
 107         static GType type = 0;
 108         if (type == 0)
 109                 {
 110                 static const GTypeInfo info = {
 111                         sizeof(ImageLoaderClass),
 112                         nullptr,   /* base_init */
 113                         nullptr,   /* base_finalize */
 114                         static_cast<GClassInitFunc>(image_loader_class_init_wrapper), /* class_init */
 115                         nullptr,   /* class_finalize */
 116                         nullptr,   /* class_data */
 117                         sizeof(ImageLoader),
 118                         0,      /* n_preallocs */
 119                         static_cast<GInstanceInitFunc>(image_loader_init), /* instance_init */
 120                         nullptr /* value_table */
 121                         };
 122                 type = g_type_register_static(G_TYPE_OBJECT, "ImageLoaderType", &info, static_cast<GTypeFlags>(0));
 123                 }
 124         return type;
 125 }
 126
 127 static void image_loader_init(GTypeInstance *instance, gpointer)
 128 {
 129         auto il = reinterpret_cast<ImageLoader *>(instance);
 130
 131         il->pixbuf = nullptr;
 132         il->idle_id = 0;
 133         il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
 134         il->done = FALSE;
 135         il->backend.reset(nullptr);
 136
 137         il->bytes_read = 0;
 138         il->bytes_total = 0;
 139
 140         il->idle_done_id = 0;
 141
 142         il->idle_read_loop_count = IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT;
 143         il->read_buffer_size = IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT;
 144         il->mapped_file = nullptr;
 145         il->preview = IMAGE_LOADER_PREVIEW_NONE;
 146
 147         il->requested_width = 0;
 148         il->requested_height = 0;
 149         il->actual_width = 0;
 150         il->actual_height = 0;
 151         il->shrunk = FALSE;
 152
 153         il->can_destroy = TRUE;
 154
 155         il->data_mutex = g_new(GMutex, 1);
 156         g_mutex_init(il->data_mutex);
 157         il->can_destroy_cond = g_new(GCond, 1);
 158         g_cond_init(il->can_destroy_cond);
 159
 160         DEBUG_1("new image loader %p, bufsize=%" G_GSIZE_FORMAT " idle_loop=%u", (void *)il, il->read_buffer_size, il->idle_read_loop_count);
 161 }
 162
 163 static void image_loader_class_init_wrapper(void *data, void *)
 164 {
 165         image_loader_class_init(static_cast<ImageLoaderClass *>(data));
 166 }
 167
 168 static void image_loader_class_init(ImageLoaderClass *loader_class)
 169 {
 170         GObjectClass *gobject_class = G_OBJECT_CLASS (loader_class);
 171
 172         gobject_class->finalize = image_loader_finalize;
 173
 174
 175         signals[SIGNAL_AREA_READY] =
 176                 g_signal_new("area_ready",
 177                              G_OBJECT_CLASS_TYPE(gobject_class),
 178                              G_SIGNAL_RUN_LAST,
 179                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 180                              nullptr, nullptr,
 181                              gq_marshal_VOID__INT_INT_INT_INT,
 182                              G_TYPE_NONE, 4,
 183                              G_TYPE_INT,
 184                              G_TYPE_INT,
 185                              G_TYPE_INT,
 186                              G_TYPE_INT);
 187
 188         signals[SIGNAL_ERROR] =
 189                 g_signal_new("error",
 190                              G_OBJECT_CLASS_TYPE(gobject_class),
 191                              G_SIGNAL_RUN_LAST,
 192                              G_STRUCT_OFFSET(ImageLoaderClass, error),
 193                              nullptr, nullptr,
 194                              g_cclosure_marshal_VOID__VOID,
 195                              G_TYPE_NONE, 0);
 196
 197         signals[SIGNAL_DONE] =
 198                 g_signal_new("done",
 199                              G_OBJECT_CLASS_TYPE(gobject_class),
 200                              G_SIGNAL_RUN_LAST,
 201                              G_STRUCT_OFFSET(ImageLoaderClass, done),
 202                              nullptr, nullptr,
 203                              g_cclosure_marshal_VOID__VOID,
 204                              G_TYPE_NONE, 0);
 205
 206         signals[SIGNAL_PERCENT] =
 207                 g_signal_new("percent",
 208                              G_OBJECT_CLASS_TYPE(gobject_class),
 209                              G_SIGNAL_RUN_LAST,
 210                              G_STRUCT_OFFSET(ImageLoaderClass, percent),
 211                              nullptr, nullptr,
 212                              g_cclosure_marshal_VOID__DOUBLE,
 213                              G_TYPE_NONE, 1,
 214                              G_TYPE_DOUBLE);
 215
 216         signals[SIGNAL_SIZE] =
 217                 g_signal_new("size_prepared",
 218                              G_OBJECT_CLASS_TYPE(gobject_class),
 219                              G_SIGNAL_RUN_LAST,
 220                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 221                              nullptr, nullptr,
 222                              gq_marshal_VOID__INT_INT,
 223                              G_TYPE_NONE, 2,
 224                              G_TYPE_INT,
 225                              G_TYPE_INT);
 226
 227 }
 228
 229 static void image_loader_finalize(GObject *object)
 230 {
 231         auto il = reinterpret_cast<ImageLoader *>(object);
 232
 233         image_loader_stop(il);
 234
 235         if (il->error) DEBUG_1("%s", image_loader_get_error(il));
 236
 237         DEBUG_1("freeing image loader %p bytes_read=%" G_GSIZE_FORMAT, (void *)il, il->bytes_read);
 238
 239         if (il->idle_done_id)
 240                 {
 241                 g_source_remove(il->idle_done_id);
 242                 il->idle_done_id = 0;
 243                 }
 244
 245         while (g_source_remove_by_user_data(il))
 246                 {
 247                 DEBUG_2("pending signals detected");
 248                 }
 249
 250         while (il->area_param_list)
 251                 {
 252                 DEBUG_1("pending area_ready signals detected");
 253                 while (g_source_remove_by_user_data(il->area_param_list->data)) {}
 254                 g_free(il->area_param_list->data);
 255                 il->area_param_list = g_list_delete_link(il->area_param_list, il->area_param_list);
 256                 }
 257
 258         while (il->area_param_delayed_list)
 259                 {
 260                 g_free(il->area_param_delayed_list->data);
 261                 il->area_param_delayed_list = g_list_delete_link(il->area_param_delayed_list, il->area_param_delayed_list);
 262                 }
 263
 264         if (il->pixbuf) g_object_unref(il->pixbuf);
 265
 266         if (il->error) g_error_free(il->error);
 267
 268         file_data_unref(il->fd);
 269
 270         g_mutex_clear(il->data_mutex);
 271         g_free(il->data_mutex);
 272         g_cond_clear(il->can_destroy_cond);
 273         g_free(il->can_destroy_cond);
 274 }
 275
 276 void image_loader_free(ImageLoader *il)
 277 {
 278         if (!il) return;
 279         g_object_unref(G_OBJECT(il));
 280 }
 281
 282
 283 ImageLoader *image_loader_new(FileData *fd)
 284 {
 285         ImageLoader *il;
 286
 287         if (!fd) return nullptr;
 288
 289         il = static_cast<ImageLoader *>(g_object_new(TYPE_IMAGE_LOADER, nullptr));
 290
 291         il->fd = file_data_ref(fd);
 292
 293         return il;
 294 }
 295
 296 /**************************************************************************************/
 297 /* send signals via idle calbacks - the callback are executed in the main thread */
 298
 299 struct ImageLoaderAreaParam {
 300         ImageLoader *il;
 301         guint x;
 302         guint y;
 303         guint w;
 304         guint h;
 305 };
 306
 307
 308 static gboolean image_loader_emit_area_ready_cb(gpointer data)
 309 {
 310         auto par = static_cast<ImageLoaderAreaParam *>(data);
 311         ImageLoader *il = par->il;
 312         guint x;
 313         guint y;
 314         guint w;
 315         guint h;
 316         g_mutex_lock(il->data_mutex);
 317         il->area_param_list = g_list_remove(il->area_param_list, par);
 318         x = par->x;
 319         y = par->y;
 320         w = par->w;
 321         h = par->h;
 322         g_free(par);
 323         g_mutex_unlock(il->data_mutex);
 324
 325         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, x, y, w, h);
 326
 327         return G_SOURCE_REMOVE;
 328 }
 329
 330 static gboolean image_loader_emit_done_cb(gpointer data)
 331 {
 332         auto il = static_cast<ImageLoader *>(data);
 333         g_signal_emit(il, signals[SIGNAL_DONE], 0);
 334         return G_SOURCE_REMOVE;
 335 }
 336
 337 static gboolean image_loader_emit_error_cb(gpointer data)
 338 {
 339         auto il = static_cast<ImageLoader *>(data);
 340         g_signal_emit(il, signals[SIGNAL_ERROR], 0);
 341         return G_SOURCE_REMOVE;
 342 }
 343
 344 static gboolean image_loader_emit_percent_cb(gpointer data)
 345 {
 346         auto il = static_cast<ImageLoader *>(data);
 347         g_signal_emit(il, signals[SIGNAL_PERCENT], 0, image_loader_get_percent(il));
 348         return G_SOURCE_REMOVE;
 349 }
 350
 351 static gboolean image_loader_emit_size_cb(gpointer data)
 352 {
 353         gint width;
 354         gint height;
 355         auto il = static_cast<ImageLoader *>(data);
 356         g_mutex_lock(il->data_mutex);
 357         width = il->actual_width;
 358         height = il->actual_height;
 359         g_mutex_unlock(il->data_mutex);
 360         g_signal_emit(il, signals[SIGNAL_SIZE], 0, width, height);
 361         return G_SOURCE_REMOVE;
 362 }
 363
 364
 365 /* DONE and ERROR are emitted only once, thus they can have normal priority
 366    PERCENT and AREA_READY should be processed ASAP
 367 */
 368
 369 static void image_loader_emit_done(ImageLoader *il)
 370 {
 371         g_idle_add_full(il->idle_priority, image_loader_emit_done_cb, il, nullptr);
 372 }
 373
 374 static void image_loader_emit_error(ImageLoader *il)
 375 {
 376         g_idle_add_full(il->idle_priority, image_loader_emit_error_cb, il, nullptr);
 377 }
 378
 379 static void image_loader_emit_percent(ImageLoader *il)
 380 {
 381         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_percent_cb, il, nullptr);
 382 }
 383
 384 static void image_loader_emit_size(ImageLoader *il)
 385 {
 386         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_size_cb, il, nullptr);
 387 }
 388
 389 static ImageLoaderAreaParam *image_loader_queue_area_ready(ImageLoader *il, GList **list, guint x, guint y, guint w, guint h)
 390 {
 391         if (*list)
 392                 {
 393                 auto prev_par = static_cast<ImageLoaderAreaParam *>((*list)->data);
 394                 if (prev_par->x == x && prev_par->w == w &&
 395                     prev_par->y + prev_par->h == y)
 396                         {
 397                         /* we can merge the notifications */
 398                         prev_par->h += h;
 399                         return nullptr;
 400                         }
 401                 if (prev_par->x == x && prev_par->w == w &&
 402                     y + h == prev_par->y)
 403                         {
 404                         /* we can merge the notifications */
 405                         prev_par->h += h;
 406                         prev_par->y = y;
 407                         return nullptr;
 408                         }
 409                 if (prev_par->y == y && prev_par->h == h &&
 410                     prev_par->x + prev_par->w == x)
 411                         {
 412                         /* we can merge the notifications */
 413                         prev_par->w += w;
 414                         return nullptr;
 415                         }
 416                 if (prev_par->y == y && prev_par->h == h &&
 417                     x + w == prev_par->x)
 418                         {
 419                         /* we can merge the notifications */
 420                         prev_par->w += w;
 421                         prev_par->x = x;
 422                         return nullptr;
 423                         }
 424                 }
 425
 426         auto par = g_new0(ImageLoaderAreaParam, 1);
 427         par->il = il;
 428         par->x = x;
 429         par->y = y;
 430         par->w = w;
 431         par->h = h;
 432
 433         *list = g_list_prepend(*list, par);
 434         return par;
 435 }
 436
 437 /* this function expects that il->data_mutex is locked by caller */
 438 static void image_loader_emit_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 439 {
 440         ImageLoaderAreaParam *par = image_loader_queue_area_ready(il, &il->area_param_list, x, y, w, h);
 441
 442         if (par)
 443                 {
 444                 g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_area_ready_cb, par, nullptr);
 445                 }
 446 }
 447
 448 /**************************************************************************************/
 449 /* the following functions may be executed in separate thread */
 450
 451 /* this function expects that il->data_mutex is locked by caller */
 452 static void image_loader_queue_delayed_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 453 {
 454         image_loader_queue_area_ready(il, &il->area_param_delayed_list, x, y, w, h);
 455 }
 456
 457
 458
 459 static gboolean image_loader_get_stopping(ImageLoader *il)
 460 {
 461         gboolean ret;
 462         if (!il) return FALSE;
 463
 464         g_mutex_lock(il->data_mutex);
 465         ret = il->stopping;
 466         g_mutex_unlock(il->data_mutex);
 467
 468         return ret;
 469 }
 470
 471
 472 static void image_loader_sync_pixbuf(ImageLoader *il)
 473 {
 474         GdkPixbuf *pb;
 475
 476         g_mutex_lock(il->data_mutex);
 477
 478         if (!il->backend)
 479                 {
 480                 g_mutex_unlock(il->data_mutex);
 481                 return;
 482                 }
 483
 484         pb = il->backend->get_pixbuf();
 485
 486         if (pb == il->pixbuf)
 487                 {
 488                 g_mutex_unlock(il->data_mutex);
 489                 return;
 490                 }
 491
 492         if (g_ascii_strcasecmp(".jps", il->fd->extension) == 0)
 493                 {
 494                 g_object_set_data(G_OBJECT(pb), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 495                 }
 496
 497         if (il->pixbuf) g_object_unref(il->pixbuf);
 498
 499         il->pixbuf = pb;
 500         if (il->pixbuf) g_object_ref(il->pixbuf);
 501
 502         g_mutex_unlock(il->data_mutex);
 503 }
 504
 505 static void image_loader_area_updated_cb(gpointer,
 506                                  guint x, guint y, guint w, guint h,
 507                                  gpointer data)
 508 {
 509         auto il = static_cast<ImageLoader *>(data);
 510
 511         if (!image_loader_get_pixbuf(il))
 512                 {
 513                 image_loader_sync_pixbuf(il);
 514                 if (!image_loader_get_pixbuf(il))
 515                         {
 516                         log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
 517                         }
 518                 }
 519
 520         g_mutex_lock(il->data_mutex);
 521         if (il->delay_area_ready)
 522                 image_loader_queue_delayed_area_ready(il, x, y, w, h);
 523         else
 524                 image_loader_emit_area_ready(il, x, y, w, h);
 525
 526         if (il->stopping) il->backend->abort();
 527
 528         g_mutex_unlock(il->data_mutex);
 529 }
 530
 531 static void image_loader_area_prepared_cb(gpointer, gpointer data)
 532 {
 533         auto il = static_cast<ImageLoader *>(data);
 534         GdkPixbuf *pb;
 535         guchar *pix;
 536         size_t h;
 537         size_t rs;
 538
 539         /* a workaround for
 540            https://bugzilla.gnome.org/show_bug.cgi?id=547669
 541            https://bugzilla.gnome.org/show_bug.cgi?id=589334
 542         */
 543         gchar *format = il->backend->get_format_name();
 544         if (strcmp(format, "svg") == 0 ||
 545             strcmp(format, "xpm") == 0)
 546                 {
 547                 g_free(format);
 548                 return;
 549                 }
 550
 551         g_free(format);
 552
 553         pb = il->backend->get_pixbuf();
 554
 555         h = gdk_pixbuf_get_height(pb);
 556         rs = gdk_pixbuf_get_rowstride(pb);
 557         pix = gdk_pixbuf_get_pixels(pb);
 558
 559         memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
 560
 561 }
 562
 563 static void image_loader_size_cb(gpointer,
 564                                  gint width, gint height, gpointer data)
 565 {
 566         auto il = static_cast<ImageLoader *>(data);
 567         gchar **mime_types;
 568         gboolean scale = FALSE;
 569         gint n;
 570
 571         g_mutex_lock(il->data_mutex);
 572         il->actual_width = width;
 573         il->actual_height = height;
 574         if (il->requested_width < 1 || il->requested_height < 1)
 575                 {
 576                 g_mutex_unlock(il->data_mutex);
 577                 image_loader_emit_size(il);
 578                 return;
 579                 }
 580         g_mutex_unlock(il->data_mutex);
 581
 582 #if HAVE_FFMPEGTHUMBNAILER
 583         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 584                 scale = TRUE;
 585 #endif
 586         mime_types = il->backend->get_format_mime_types();
 587         n = 0;
 588         while (mime_types[n] && !scale)
 589                 {
 590                 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
 591                 n++;
 592                 }
 593         g_strfreev(mime_types);
 594
 595         if (!scale)
 596                 {
 597                 image_loader_emit_size(il);
 598                 return;
 599                 }
 600
 601         g_mutex_lock(il->data_mutex);
 602
 603         gint nw;
 604         gint nh;
 605         if (width > il->requested_width || height > il->requested_height)
 606                 {
 607
 608                 if ((static_cast<gdouble>(il->requested_width) / width) < (static_cast<gdouble>(il->requested_height) / height))
 609                         {
 610                         nw = il->requested_width;
 611                         nh = static_cast<gdouble>(nw) / width * height;
 612                         if (nh < 1) nh = 1;
 613                         }
 614                 else
 615                         {
 616                         nh = il->requested_height;
 617                         nw = static_cast<gdouble>(nh) / height * width;
 618                         if (nw < 1) nw = 1;
 619                         }
 620
 621                 il->actual_width = nw;
 622                 il->actual_height = nh;
 623                 il->backend->set_size(nw, nh);
 624                 il->shrunk = TRUE;
 625                 }
 626
 627         g_mutex_unlock(il->data_mutex);
 628         image_loader_emit_size(il);
 629 }
 630
 631 static void image_loader_stop_loader(ImageLoader *il)
 632 {
 633         if (!il) return;
 634
 635         if (il->backend)
 636                 {
 637                 /* some loaders do not have a pixbuf till close, order is important here */
 638                 il->backend->close(il->error ? nullptr : &il->error); /* we are interested in the first error only */
 639                 image_loader_sync_pixbuf(il);
 640                 il->backend.reset(nullptr);
 641                 }
 642         g_mutex_lock(il->data_mutex);
 643         il->done = TRUE;
 644         g_mutex_unlock(il->data_mutex);
 645 }
 646
 647 static void image_loader_setup_loader(ImageLoader *il)
 648 {
 649         gint external_preview = 1;
 650
 651         g_mutex_lock(il->data_mutex);
 652
 653         if (options->external_preview.enable)
 654                 {
 655                 gchar *cmd_line;
 656                 gchar *tilde_filename;
 657
 658                 tilde_filename = expand_tilde(options->external_preview.select);
 659
 660                 cmd_line = g_strdup_printf("\"%s\" \"%s\"" , tilde_filename, il->fd->path);
 661
 662                 external_preview = runcmd(cmd_line);
 663                 g_free(cmd_line);
 664                 g_free(tilde_filename);
 665                 }
 666
 667         if (external_preview == 0)
 668                 {
 669                 DEBUG_1("Using custom external loader");
 670                 il->backend = get_image_loader_backend_external();
 671                 }
 672         else
 673                 {
 674 #if HAVE_FFMPEGTHUMBNAILER
 675                 if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 676                         {
 677                         DEBUG_1("Using custom ffmpegthumbnailer loader");
 678                         il->backend = get_image_loader_backend_ft();
 679                         }
 680                 else
 681 #endif
 682 #if HAVE_PDF
 683                 if (il->bytes_total >= 4 &&
 684                     (memcmp(il->mapped_file + 0, "%PDF", 4) == 0))
 685                         {
 686                         DEBUG_1("Using custom pdf loader");
 687                         il->backend = get_image_loader_backend_pdf();
 688                         }
 689                 else
 690 #endif
 691 #if HAVE_HEIF
 692                 if (il->bytes_total >= 12 &&
 693                     ((memcmp(il->mapped_file + 4, "ftypheic", 8) == 0) ||
 694                      (memcmp(il->mapped_file + 4, "ftypheix", 8) == 0) ||
 695                      (memcmp(il->mapped_file + 4, "ftypmsf1", 8) == 0) ||
 696                      (memcmp(il->mapped_file + 4, "ftypmif1", 8) == 0) ||
 697                      (memcmp(il->mapped_file + 4, "ftypavif", 8) == 0)))
 698                         {
 699                         DEBUG_1("Using custom heif loader");
 700                         il->backend = get_image_loader_backend_heif();
 701                         }
 702                 else
 703         #endif
 704         #if HAVE_WEBP
 705                 if (il->bytes_total >= 12 &&
 706                         (memcmp(il->mapped_file, "RIFF", 4) == 0) &&
 707                         (memcmp(il->mapped_file + 8, "WEBP", 4) == 0))
 708                         {
 709                         DEBUG_1("Using custom webp loader");
 710                         il->backend = get_image_loader_backend_webp();
 711                         }
 712                 else
 713 #endif
 714 #if HAVE_DJVU
 715                 if (il->bytes_total >= 16 &&
 716                         (memcmp(il->mapped_file, "AT&TFORM", 8) == 0) &&
 717                         (memcmp(il->mapped_file + 12, "DJV", 3) == 0))
 718                         {
 719                         DEBUG_1("Using custom djvu loader");
 720                         il->backend = get_image_loader_backend_djvu();
 721                         }
 722                 else
 723 #endif
 724 #if HAVE_JPEG
 725                 if (il->bytes_total >= 2 && il->mapped_file[0] == 0xff && il->mapped_file[1] == 0xd8)
 726                         {
 727                         DEBUG_1("Using custom jpeg loader");
 728                         il->backend = get_image_loader_backend_jpeg();
 729                         }
 730 #if !HAVE_RAW
 731                 else
 732                 if (il->bytes_total >= 11 &&
 733                     (memcmp(il->mapped_file + 4, "ftypcrx", 7) == 0) &&
 734                     (memcmp(il->mapped_file + 64, "CanonCR3", 8) == 0))
 735                         {
 736                         DEBUG_1("Using custom cr3 loader");
 737                         il->backend = get_image_loader_backend_cr3();
 738                         }
 739 #endif
 740                 else
 741 #endif
 742 #if HAVE_TIFF
 743                 if (il->bytes_total >= 10 &&
 744                     (memcmp(il->mapped_file, "MM\0*", 4) == 0 ||
 745                      memcmp(il->mapped_file, "MM\0+\0\x08\0\0", 8) == 0 ||
 746                      memcmp(il->mapped_file, "II+\0\x08\0\0\0", 8) == 0 ||
 747                      memcmp(il->mapped_file, "II*\0", 4) == 0))
 748                         {
 749                         DEBUG_1("Using custom tiff loader");
 750                         il->backend = get_image_loader_backend_tiff();
 751                         }
 752                 else
 753 #endif
 754                 if (il->bytes_total >= 3 && il->mapped_file[0] == 0x44 && il->mapped_file[1] == 0x44 && il->mapped_file[2] == 0x53)
 755                         {
 756                         DEBUG_1("Using dds loader");
 757                         il->backend = get_image_loader_backend_dds();
 758                         }
 759                 else
 760                 if (il->bytes_total >= 6 &&
 761                         (memcmp(il->mapped_file, "8BPS\0\x01", 6) == 0))
 762                         {
 763                         DEBUG_1("Using custom psd loader");
 764                         il->backend = get_image_loader_backend_psd();
 765                         }
 766                 else
 767 #if HAVE_J2K
 768                 if (il->bytes_total >= 12 &&
 769                         (memcmp(il->mapped_file, "\0\0\0\x0CjP\x20\x20\x0D\x0A\x87\x0A", 12) == 0))
 770                         {
 771                         DEBUG_1("Using custom j2k loader");
 772                         il->backend = get_image_loader_backend_j2k();
 773                         }
 774                 else
 775 #endif
 776 #if HAVE_JPEGXL
 777                 if ((il->bytes_total >= 12 &&
 778                      (memcmp(il->mapped_file, "\0\0\0\x0C\x4A\x58\x4C\x20\x0D\x0A\x87\x0A", 12) == 0)) ||
 779                     (il->bytes_total >= 2 &&
 780                      (memcmp(il->mapped_file, "\xFF\x0A", 2) == 0)))
 781                         {
 782                         DEBUG_1("Using custom jpeg xl loader");
 783                         il->backend = get_image_loader_backend_jpegxl();
 784                         }
 785                 else
 786 #endif
 787                 if ((il->bytes_total == 6144 || il->bytes_total == 6912) &&
 788                         (file_extension_match(il->fd->path, ".scr")))
 789                         {
 790                         DEBUG_1("Using custom zxscr loader");
 791                         il->backend = get_image_loader_backend_zxscr();
 792                         }
 793                 else
 794                 if (il->fd->format_class == FORMAT_CLASS_COLLECTION)
 795                         {
 796                         DEBUG_1("Using custom collection loader");
 797                         il->backend = get_image_loader_backend_collection();
 798                         }
 799                 else
 800                 if (g_strcmp0(strrchr(il->fd->path, '.'), ".svgz") == 0)
 801                         {
 802                         DEBUG_1("Using custom svgz loader");
 803                         il->backend = get_image_loader_backend_svgz();
 804                         }
 805                 else
 806                         il->backend = get_image_loader_backend_default();
 807                 }
 808
 809         il->backend->init(image_loader_area_updated_cb, image_loader_size_cb, image_loader_area_prepared_cb, il);
 810         il->backend->set_page_num(il->fd->page_num);
 811
 812         il->fd->format_name = il->backend->get_format_name();
 813
 814         g_mutex_unlock(il->data_mutex);
 815 }
 816
 817
 818 static void image_loader_done(ImageLoader *il)
 819 {
 820         image_loader_stop_loader(il);
 821
 822         image_loader_emit_done(il);
 823 }
 824
 825 static void image_loader_error(ImageLoader *il)
 826 {
 827         image_loader_stop_loader(il);
 828
 829         DEBUG_1("pixbuf_loader reported load error for: %s", il->fd->path);
 830
 831         image_loader_emit_error(il);
 832 }
 833
 834 static gboolean image_loader_continue(ImageLoader *il)
 835 {
 836         gint c;
 837
 838         if (!il) return G_SOURCE_REMOVE;
 839
 840         c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
 841         while (c > 0 && !image_loader_get_stopping(il))
 842                 {
 843                 if (il->bytes_total == il->bytes_read)
 844                         {
 845                         image_loader_done(il);
 846                         return G_SOURCE_REMOVE;
 847                         }
 848
 849                 if (il->bytes_total < il->bytes_read)
 850                         {
 851                         image_loader_error(il);
 852                         return G_SOURCE_REMOVE;
 853                         }
 854
 855                 gsize b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 856
 857                 if (!il->backend->write(il->mapped_file + il->bytes_read, b, il->bytes_total, &il->error))
 858                         {
 859                         image_loader_error(il);
 860                         return G_SOURCE_REMOVE;
 861                         }
 862
 863                 il->bytes_read += b;
 864
 865                 c--;
 866                 }
 867
 868         if (il->bytes_total > 0)
 869                 {
 870                 image_loader_emit_percent(il);
 871                 }
 872
 873         return G_SOURCE_CONTINUE;
 874 }
 875
 876 static gboolean image_loader_begin(ImageLoader *il)
 877 {
 878         if (il->pixbuf) return FALSE;
 879
 880         if (il->bytes_total <= il->bytes_read) return FALSE;
 881
 882         gsize b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 883
 884         image_loader_setup_loader(il);
 885
 886         g_assert(il->bytes_read == 0);
 887         if (!il->backend->write(il->mapped_file, b, il->bytes_total, &il->error))
 888                 {
 889                 image_loader_stop_loader(il);
 890                 return FALSE;
 891                 }
 892
 893         file_data_set_page_total(il->fd, il->backend->get_page_total());
 894
 895         il->bytes_read += b;
 896
 897         /* read until size is known */
 898         while (il->backend && !il->backend->get_pixbuf() && b > 0 && !image_loader_get_stopping(il))
 899                 {
 900                 if (il->bytes_total < il->bytes_read)
 901                         {
 902                         image_loader_stop_loader(il);
 903                         return FALSE;
 904                         }
 905
 906                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 907                 if (b > 0 && !il->backend->write(il->mapped_file + il->bytes_read, b, il->bytes_total, &il->error))
 908                         {
 909                         image_loader_stop_loader(il);
 910                         return FALSE;
 911                         }
 912                 il->bytes_read += b;
 913                 }
 914         if (!il->pixbuf) image_loader_sync_pixbuf(il);
 915
 916         if (il->bytes_read == il->bytes_total || b < 1)
 917                 {
 918                 /* done, handle (broken) loaders that do not have pixbuf till close */
 919                 image_loader_stop_loader(il);
 920
 921                 if (!il->pixbuf) return FALSE;
 922
 923                 image_loader_done(il);
 924                 return TRUE;
 925                 }
 926
 927         if (!il->pixbuf)
 928                 {
 929                 image_loader_stop_loader(il);
 930                 return FALSE;
 931                 }
 932
 933         return TRUE;
 934 }
 935
 936 /**************************************************************************************/
 937 /* the following functions are always executed in the main thread */
 938
 939
 940 static gboolean image_loader_setup_source(ImageLoader *il)
 941 {
 942         struct stat st;
 943         gchar *pathl;
 944
 945         if (!il || il->backend || il->mapped_file) return FALSE;
 946
 947         il->mapped_file = nullptr;
 948
 949         if (il->fd)
 950                 {
 951                 ExifData *exif = exif_read_fd(il->fd);
 952
 953                 if (options->thumbnails.use_exif)
 954                         {
 955                         il->mapped_file = exif_get_preview(exif, reinterpret_cast<guint *>(&il->bytes_total), il->requested_width, il->requested_height);
 956
 957                         if (il->mapped_file)
 958                                 {
 959                                 il->preview = IMAGE_LOADER_PREVIEW_EXIF;
 960                                 }
 961                         }
 962                 else
 963                         {
 964                         il->mapped_file = libraw_get_preview(il, reinterpret_cast<guint *>(&il->bytes_total));
 965
 966                         if (il->mapped_file)
 967                                 {
 968                                 /* Both exiv2 and libraw sometimes return a pointer to a file
 969                                  * section that is not a jpeg */
 970                                 if (il->mapped_file[0] != 0xFF || il->mapped_file[1] != 0xD8)
 971                                         {
 972                                         il->mapped_file = nullptr;
 973                                         }
 974                                 else
 975                                         {
 976                                         il->preview = IMAGE_LOADER_PREVIEW_LIBRAW;
 977                                         }
 978                                 }
 979                         }
 980
 981                 /* If libraw does not find a thumbnail, try exiv2 */
 982                 if (!il->mapped_file)
 983                         {
 984                         il->mapped_file = exif_get_preview(exif, reinterpret_cast<guint *>(&il->bytes_total), 0, 0); /* get the largest available preview image or NULL for normal images*/
 985
 986                         if (il->mapped_file)
 987                                 {
 988                                 /* Both exiv2 and libraw sometimes return a pointer to a file
 989                                  * section that is not a jpeg */
 990                                 if (il->mapped_file[0] != 0xFF || il->mapped_file[1] != 0xD8)
 991                                         {
 992                                         il->mapped_file = nullptr;
 993                                         }
 994                                 else
 995                                         {
 996                                         il->preview = IMAGE_LOADER_PREVIEW_EXIF;
 997                                         }
 998                                 }
 999                         }
1000
1001                 if (il->mapped_file)
1002                         {
1003                         DEBUG_1("Usable reduced size (preview) image loaded from file %s", il->fd->path);
1004                         }
1005                 exif_free_fd(il->fd, exif);
1006                 }
1007
1008
1009         if (!il->mapped_file)
1010                 {
1011                 /* normal file */
1012                 gint load_fd;
1013
1014                 pathl = path_from_utf8(il->fd->path);
1015                 load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
1016                 g_free(pathl);
1017                 if (load_fd == -1) return FALSE;
1018
1019                 if (fstat(load_fd, &st) == 0)
1020                         {
1021                         il->bytes_total = st.st_size;
1022                         }
1023                 else
1024                         {
1025                         close(load_fd);
1026                         return FALSE;
1027                         }
1028
1029                 il->mapped_file = static_cast<guchar *>(mmap(nullptr, il->bytes_total, PROT_READ|PROT_WRITE, MAP_PRIVATE, load_fd, 0));
1030                 close(load_fd);
1031                 if (il->mapped_file == MAP_FAILED)
1032                         {
1033                         il->mapped_file = nullptr;
1034                         return FALSE;
1035                         }
1036                 il->preview = IMAGE_LOADER_PREVIEW_NONE;
1037                 }
1038
1039         return TRUE;
1040 }
1041
1042 static void image_loader_stop_source(ImageLoader *il)
1043 {
1044         if (!il) return;
1045
1046         if (il->mapped_file)
1047                 {
1048                 if (il->preview == IMAGE_LOADER_PREVIEW_EXIF)
1049                         {
1050                         exif_free_preview(il->mapped_file);
1051                         }
1052                 else if (il->preview == IMAGE_LOADER_PREVIEW_LIBRAW)
1053                         {
1054                         libraw_free_preview(il->mapped_file);
1055                         }
1056                 else
1057                         {
1058                         munmap(il->mapped_file, il->bytes_total);
1059                         }
1060                 il->mapped_file = nullptr;
1061                 }
1062 }
1063
1064 static void image_loader_stop(ImageLoader *il)
1065 {
1066         if (!il) return;
1067
1068         if (il->idle_id)
1069                 {
1070                 g_source_remove(il->idle_id);
1071                 il->idle_id = 0;
1072                 }
1073
1074         if (il->thread)
1075                 {
1076                 /* stop loader in the other thread */
1077                 g_mutex_lock(il->data_mutex);
1078                 il->stopping = TRUE;
1079                 while (!il->can_destroy) g_cond_wait(il->can_destroy_cond, il->data_mutex);
1080                 g_mutex_unlock(il->data_mutex);
1081                 }
1082
1083         image_loader_stop_loader(il);
1084         image_loader_stop_source(il);
1085
1086 }
1087
1088 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable)
1089 {
1090         g_mutex_lock(il->data_mutex);
1091         il->delay_area_ready = enable;
1092         if (!enable)
1093                 {
1094                 /* send delayed */
1095                 GList *list;
1096                 GList *work;
1097                 list = g_list_reverse(il->area_param_delayed_list);
1098                 il->area_param_delayed_list = nullptr;
1099                 g_mutex_unlock(il->data_mutex);
1100
1101                 work = list;
1102
1103                 while (work)
1104                         {
1105                         auto par = static_cast<ImageLoaderAreaParam *>(work->data);
1106                         work = work->next;
1107
1108                         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, par->x, par->y, par->w, par->h);
1109                         }
1110                 g_list_free_full(list, g_free);
1111                 }
1112         else
1113                 {
1114                 /* just unlock */
1115                 g_mutex_unlock(il->data_mutex);
1116                 }
1117 }
1118
1119
1120 /**************************************************************************************/
1121 /* execution via idle calls */
1122
1123 static gboolean image_loader_idle_cb(gpointer data)
1124 {
1125         gboolean ret = G_SOURCE_REMOVE;
1126         auto il = static_cast<ImageLoader *>(data);
1127
1128         if (il->idle_id)
1129                 {
1130                 ret = image_loader_continue(il);
1131                 }
1132
1133         if (!ret)
1134                 {
1135                 image_loader_stop_source(il);
1136                 }
1137
1138         return ret;
1139 }
1140
1141 static gboolean image_loader_start_idle(ImageLoader *il)
1142 {
1143         gboolean ret;
1144
1145         if (!il) return FALSE;
1146
1147         if (!il->fd) return FALSE;
1148
1149         if (!image_loader_setup_source(il)) return FALSE;
1150
1151         ret = image_loader_begin(il);
1152
1153         if (ret && !il->done) il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, nullptr);
1154         return ret;
1155 }
1156
1157 /**************************************************************************************/
1158 /* execution via thread */
1159
1160 static GThreadPool *image_loader_thread_pool = nullptr;
1161
1162 static GCond *image_loader_prio_cond = nullptr;
1163 static GMutex *image_loader_prio_mutex = nullptr;
1164 static gint image_loader_prio_num = 0;
1165
1166
1167 static void image_loader_thread_enter_high()
1168 {
1169         g_mutex_lock(image_loader_prio_mutex);
1170         image_loader_prio_num++;
1171         g_mutex_unlock(image_loader_prio_mutex);
1172 }
1173
1174 static void image_loader_thread_leave_high()
1175 {
1176         g_mutex_lock(image_loader_prio_mutex);
1177         image_loader_prio_num--;
1178         if (image_loader_prio_num == 0) g_cond_broadcast(image_loader_prio_cond); /* wake up all low prio threads */
1179         g_mutex_unlock(image_loader_prio_mutex);
1180 }
1181
1182 static void image_loader_thread_wait_high()
1183 {
1184         g_mutex_lock(image_loader_prio_mutex);
1185         while (image_loader_prio_num)
1186                 {
1187                 g_cond_wait(image_loader_prio_cond, image_loader_prio_mutex);
1188                 }
1189
1190         g_mutex_unlock(image_loader_prio_mutex);
1191 }
1192
1193
1194 static void image_loader_thread_run(gpointer data, gpointer)
1195 {
1196         auto il = static_cast<ImageLoader *>(data);
1197         gboolean cont;
1198         gboolean err;
1199
1200         if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1201                 {
1202                 /* low prio, wait until high prio tasks finishes */
1203                 image_loader_thread_wait_high();
1204                 }
1205         else
1206                 {
1207                 /* high prio */
1208                 image_loader_thread_enter_high();
1209                 }
1210
1211         err = !image_loader_begin(il);
1212
1213         if (err)
1214                 {
1215                 /*
1216                 loader failed, we have to send signal
1217                 (idle mode returns the image_loader_begin return value directly)
1218                 (success is always reported indirectly from image_loader_begin)
1219                 */
1220                 image_loader_emit_error(il);
1221                 }
1222
1223         cont = !err;
1224
1225         while (cont && !image_loader_get_is_done(il) && !image_loader_get_stopping(il))
1226                 {
1227                 if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1228                         {
1229                         /* low prio, wait until high prio tasks finishes */
1230                         image_loader_thread_wait_high();
1231                         }
1232                 cont = image_loader_continue(il);
1233                 }
1234         image_loader_stop_loader(il);
1235
1236         if (il->idle_priority <= G_PRIORITY_DEFAULT_IDLE)
1237                 {
1238                 /* high prio */
1239                 image_loader_thread_leave_high();
1240                 }
1241
1242         g_mutex_lock(il->data_mutex);
1243         il->can_destroy = TRUE;
1244         g_cond_signal(il->can_destroy_cond);
1245         g_mutex_unlock(il->data_mutex);
1246
1247 }
1248
1249
1250 static gboolean image_loader_start_thread(ImageLoader *il)
1251 {
1252         if (!il) return FALSE;
1253
1254         if (!il->fd) return FALSE;
1255
1256         il->thread = TRUE;
1257
1258         if (!image_loader_setup_source(il)) return FALSE;
1259
1260         if (!image_loader_thread_pool)
1261                 {
1262                 image_loader_thread_pool = g_thread_pool_new(image_loader_thread_run, nullptr, -1, FALSE, nullptr);
1263                 if (!image_loader_prio_cond) image_loader_prio_cond = g_new(GCond, 1);
1264                 g_cond_init(image_loader_prio_cond);
1265                 if (!image_loader_prio_mutex) image_loader_prio_mutex = g_new(GMutex, 1);
1266                 g_mutex_init(image_loader_prio_mutex);
1267                 }
1268
1269         il->can_destroy = FALSE; /* ImageLoader can't be freed until image_loader_thread_run finishes */
1270
1271         g_thread_pool_push(image_loader_thread_pool, il, nullptr);
1272         DEBUG_1("Thread pool num threads: %d", g_thread_pool_get_num_threads(image_loader_thread_pool));
1273
1274         return TRUE;
1275 }
1276
1277
1278 /**************************************************************************************/
1279 /* public interface */
1280
1281
1282 gboolean image_loader_start(ImageLoader *il)
1283 {
1284         if (!il) return FALSE;
1285
1286         if (!il->fd) return FALSE;
1287
1288         return image_loader_start_thread(il);
1289 }
1290
1291
1292 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
1293 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
1294 {
1295         GdkPixbuf *ret;
1296         if (!il) return nullptr;
1297
1298         g_mutex_lock(il->data_mutex);
1299         ret = il->pixbuf;
1300         g_mutex_unlock(il->data_mutex);
1301         return ret;
1302 }
1303
1304 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
1305 {
1306         if (!il) return;
1307
1308         g_mutex_lock(il->data_mutex);
1309         il->requested_width = width;
1310         il->requested_height = height;
1311         g_mutex_unlock(il->data_mutex);
1312 }
1313
1314 void image_loader_set_buffer_size(ImageLoader *il, guint count)
1315 {
1316         if (!il) return;
1317
1318         g_mutex_lock(il->data_mutex);
1319         il->idle_read_loop_count = count ? count : 1;
1320         g_mutex_unlock(il->data_mutex);
1321 }
1322
1323 void image_loader_set_priority(ImageLoader *il, gint priority)
1324 {
1325         if (!il) return;
1326
1327         if (il->thread) return; /* can't change prio if the thread already runs */
1328         il->idle_priority = priority;
1329 }
1330
1331
1332 gdouble image_loader_get_percent(ImageLoader *il)
1333 {
1334         gdouble ret;
1335         if (!il) return 0.0;
1336
1337         g_mutex_lock(il->data_mutex);
1338         if (il->bytes_total == 0)
1339                 {
1340                 ret = 0.0;
1341                 }
1342         else
1343                 {
1344                 ret = static_cast<gdouble>(il->bytes_read) / il->bytes_total;
1345                 }
1346         g_mutex_unlock(il->data_mutex);
1347         return ret;
1348 }
1349
1350 gboolean image_loader_get_is_done(ImageLoader *il)
1351 {
1352         gboolean ret;
1353         if (!il) return FALSE;
1354
1355         g_mutex_lock(il->data_mutex);
1356         ret = il->done;
1357         g_mutex_unlock(il->data_mutex);
1358
1359         return ret;
1360 }
1361
1362 FileData *image_loader_get_fd(ImageLoader *il)
1363 {
1364         FileData *ret;
1365         if (!il) return nullptr;
1366
1367         g_mutex_lock(il->data_mutex);
1368         ret = il->fd;
1369         g_mutex_unlock(il->data_mutex);
1370
1371         return ret;
1372 }
1373
1374 gboolean image_loader_get_shrunk(ImageLoader *il)
1375 {
1376         gboolean ret;
1377         if (!il) return FALSE;
1378
1379         g_mutex_lock(il->data_mutex);
1380         ret = il->shrunk;
1381         g_mutex_unlock(il->data_mutex);
1382         return ret;
1383 }
1384
1385 const gchar *image_loader_get_error(ImageLoader *il)
1386 {
1387         const gchar *ret = nullptr;
1388         if (!il) return nullptr;
1389         g_mutex_lock(il->data_mutex);
1390         if (il->error) ret = il->error->message;
1391         g_mutex_unlock(il->data_mutex);
1392         return ret;
1393 }
1394
1395
1396 /**
1397  *  @FIXME this can be rather slow and blocks until the size is known
1398  */
1399 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height)
1400 {
1401         ImageLoader *il;
1402         gboolean success;
1403
1404         il = image_loader_new(fd);
1405
1406         success = image_loader_start_idle(il);
1407
1408         if (success && il->pixbuf)
1409                 {
1410                 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
1411                 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
1412                 }
1413         else
1414                 {
1415                 if (width) *width = -1;
1416                 if (height) *height = -1;
1417                 }
1418
1419         image_loader_free(il);
1420
1421         return success;
1422 }
1423 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */