src/image-load.c

   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 "main.h"
  23 #include "image-load.h"
  24 #include "image_load_cr3.h"
  25 #include "image_load_gdk.h"
  26 #include "image_load_jpeg.h"
  27 #include "image_load_tiff.h"
  28 #include "image_load_dds.h"
  29 #include "image_load_djvu.h"
  30 #include "image_load_pdf.h"
  31 #include "image_load_psd.h"
  32 #include "image_load_heif.h"
  33 #include "image_load_ffmpegthumbnailer.h"
  34 #include "image_load_collection.h"
  35 #include "image_load_webp.h"
  36 #include "image_load_j2k.h"
  37 #include "image_load_libraw.h"
  38 #include "image_load_svgz.h"
  39
  40 #include "exif.h"
  41 #include "filedata.h"
  42 #include "ui_fileops.h"
  43 #include "gq-marshal.h"
  44
  45 #include <fcntl.h>
  46 #include <sys/mman.h>
  47
  48 #define IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT   4096
  49 #define IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT       1
  50
  51
  52 /**************************************************************************************/
  53 /* image loader class */
  54
  55
  56 enum {
  57         SIGNAL_AREA_READY = 0,
  58         SIGNAL_ERROR,
  59         SIGNAL_DONE,
  60         SIGNAL_PERCENT,
  61         SIGNAL_SIZE,
  62         SIGNAL_COUNT
  63 };
  64
  65 static guint signals[SIGNAL_COUNT] = { 0 };
  66
  67 static void image_loader_init(GTypeInstance *instance, gpointer g_class);
  68 static void image_loader_class_init_wrapper(void *data, void *user_data);
  69 static void image_loader_class_init(ImageLoaderClass *class);
  70 static void image_loader_finalize(GObject *object);
  71 static void image_loader_stop(ImageLoader *il);
  72
  73 GType image_loader_get_type(void)
  74 {
  75         static GType type = 0;
  76         if (type == 0)
  77                 {
  78                 static const GTypeInfo info = {
  79                         sizeof(ImageLoaderClass),
  80                         NULL,   /* base_init */
  81                         NULL,   /* base_finalize */
  82                         (GClassInitFunc)image_loader_class_init_wrapper, /* class_init */
  83                         NULL,   /* class_finalize */
  84                         NULL,   /* class_data */
  85                         sizeof(ImageLoader),
  86                         0,      /* n_preallocs */
  87                         (GInstanceInitFunc)image_loader_init, /* instance_init */
  88                         NULL    /* value_table */
  89                         };
  90                 type = g_type_register_static(G_TYPE_OBJECT, "ImageLoaderType", &info, 0);
  91                 }
  92         return type;
  93 }
  94
  95 static void image_loader_init(GTypeInstance *instance, gpointer g_class)
  96 {
  97         ImageLoader *il = (ImageLoader *)instance;
  98
  99         il->pixbuf = NULL;
 100         il->idle_id = 0;
 101         il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
 102         il->done = FALSE;
 103         il->loader = NULL;
 104
 105         il->bytes_read = 0;
 106         il->bytes_total = 0;
 107
 108         il->idle_done_id = 0;
 109
 110         il->idle_read_loop_count = IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT;
 111         il->read_buffer_size = IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT;
 112         il->mapped_file = NULL;
 113         il->preview = IMAGE_LOADER_PREVIEW_NONE;
 114
 115         il->requested_width = 0;
 116         il->requested_height = 0;
 117         il->actual_width = 0;
 118         il->actual_height = 0;
 119         il->shrunk = FALSE;
 120
 121         il->can_destroy = TRUE;
 122
 123 #ifdef HAVE_GTHREAD
 124 #if GLIB_CHECK_VERSION(2,32,0)
 125         il->data_mutex = g_new(GMutex, 1);
 126         g_mutex_init(il->data_mutex);
 127         il->can_destroy_cond = g_new(GCond, 1);
 128         g_cond_init(il->can_destroy_cond);
 129 #else
 130         il->data_mutex = g_mutex_new();
 131         il->can_destroy_cond = g_cond_new();
 132 #endif
 133 #endif
 134         DEBUG_1("new image loader %p, bufsize=%" G_GSIZE_FORMAT " idle_loop=%u", il, il->read_buffer_size, il->idle_read_loop_count);
 135 }
 136
 137 static void image_loader_class_init_wrapper(void *data, void *user_data)
 138 {
 139         image_loader_class_init(data);
 140 }
 141
 142 static void image_loader_class_init(ImageLoaderClass *class)
 143 {
 144         GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 145
 146 //      gobject_class->set_property = image_loader_set_property;
 147 //      gobject_class->get_property = image_loader_get_property;
 148
 149         gobject_class->finalize = image_loader_finalize;
 150
 151
 152         signals[SIGNAL_AREA_READY] =
 153                 g_signal_new("area_ready",
 154                              G_OBJECT_CLASS_TYPE(gobject_class),
 155                              G_SIGNAL_RUN_LAST,
 156                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 157                              NULL, NULL,
 158                              gq_marshal_VOID__INT_INT_INT_INT,
 159                              G_TYPE_NONE, 4,
 160                              G_TYPE_INT,
 161                              G_TYPE_INT,
 162                              G_TYPE_INT,
 163                              G_TYPE_INT);
 164
 165         signals[SIGNAL_ERROR] =
 166                 g_signal_new("error",
 167                              G_OBJECT_CLASS_TYPE(gobject_class),
 168                              G_SIGNAL_RUN_LAST,
 169                              G_STRUCT_OFFSET(ImageLoaderClass, error),
 170                              NULL, NULL,
 171                              g_cclosure_marshal_VOID__VOID,
 172                              G_TYPE_NONE, 0);
 173
 174         signals[SIGNAL_DONE] =
 175                 g_signal_new("done",
 176                              G_OBJECT_CLASS_TYPE(gobject_class),
 177                              G_SIGNAL_RUN_LAST,
 178                              G_STRUCT_OFFSET(ImageLoaderClass, done),
 179                              NULL, NULL,
 180                              g_cclosure_marshal_VOID__VOID,
 181                              G_TYPE_NONE, 0);
 182
 183         signals[SIGNAL_PERCENT] =
 184                 g_signal_new("percent",
 185                              G_OBJECT_CLASS_TYPE(gobject_class),
 186                              G_SIGNAL_RUN_LAST,
 187                              G_STRUCT_OFFSET(ImageLoaderClass, percent),
 188                              NULL, NULL,
 189                              g_cclosure_marshal_VOID__DOUBLE,
 190                              G_TYPE_NONE, 1,
 191                              G_TYPE_DOUBLE);
 192
 193         signals[SIGNAL_SIZE] =
 194                 g_signal_new("size_prepared",
 195                              G_OBJECT_CLASS_TYPE(gobject_class),
 196                              G_SIGNAL_RUN_LAST,
 197                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 198                              NULL, NULL,
 199                              gq_marshal_VOID__INT_INT,
 200                              G_TYPE_NONE, 2,
 201                              G_TYPE_INT,
 202                              G_TYPE_INT);
 203
 204 }
 205
 206 static void image_loader_finalize(GObject *object)
 207 {
 208         ImageLoader *il = (ImageLoader *)object;
 209
 210         image_loader_stop(il);
 211
 212         if (il->error) DEBUG_1("%s", image_loader_get_error(il));
 213
 214         DEBUG_1("freeing image loader %p bytes_read=%" G_GSIZE_FORMAT, il, il->bytes_read);
 215
 216         if (il->idle_done_id)
 217                 {
 218                 g_source_remove(il->idle_done_id);
 219                 il->idle_done_id = 0;
 220                 }
 221
 222         while (g_source_remove_by_user_data(il))
 223                 {
 224                 DEBUG_2("pending signals detected");
 225                 }
 226
 227         while (il->area_param_list)
 228                 {
 229                 DEBUG_1("pending area_ready signals detected");
 230                 while (g_source_remove_by_user_data(il->area_param_list->data)) {}
 231                 g_free(il->area_param_list->data);
 232                 il->area_param_list = g_list_delete_link(il->area_param_list, il->area_param_list);
 233                 }
 234
 235         while (il->area_param_delayed_list)
 236                 {
 237                 g_free(il->area_param_delayed_list->data);
 238                 il->area_param_delayed_list = g_list_delete_link(il->area_param_delayed_list, il->area_param_delayed_list);
 239                 }
 240
 241         if (il->pixbuf) g_object_unref(il->pixbuf);
 242
 243         if (il->error) g_error_free(il->error);
 244
 245         file_data_unref(il->fd);
 246 #ifdef HAVE_GTHREAD
 247 #if GLIB_CHECK_VERSION(2,32,0)
 248         g_mutex_clear(il->data_mutex);
 249         g_free(il->data_mutex);
 250         g_cond_clear(il->can_destroy_cond);
 251         g_free(il->can_destroy_cond);
 252 #else
 253         g_mutex_free(il->data_mutex);
 254         g_cond_free(il->can_destroy_cond);
 255 #endif
 256 #endif
 257 }
 258
 259 void image_loader_free(ImageLoader *il)
 260 {
 261         if (!il) return;
 262         g_object_unref(G_OBJECT(il));
 263 }
 264
 265
 266 ImageLoader *image_loader_new(FileData *fd)
 267 {
 268         ImageLoader *il;
 269
 270         if (!fd) return NULL;
 271
 272         il = (ImageLoader *) g_object_new(TYPE_IMAGE_LOADER, NULL);
 273
 274         il->fd = file_data_ref(fd);
 275
 276         return il;
 277 }
 278
 279 /**************************************************************************************/
 280 /* send signals via idle calbacks - the callback are executed in the main thread */
 281
 282 typedef struct _ImageLoaderAreaParam ImageLoaderAreaParam;
 283 struct _ImageLoaderAreaParam {
 284         ImageLoader *il;
 285         guint x;
 286         guint y;
 287         guint w;
 288         guint h;
 289 };
 290
 291
 292 static gboolean image_loader_emit_area_ready_cb(gpointer data)
 293 {
 294         ImageLoaderAreaParam *par = data;
 295         ImageLoader *il = par->il;
 296         guint x, y, w, h;
 297         g_mutex_lock(il->data_mutex);
 298         il->area_param_list = g_list_remove(il->area_param_list, par);
 299         x = par->x;
 300         y = par->y;
 301         w = par->w;
 302         h = par->h;
 303         g_free(par);
 304         g_mutex_unlock(il->data_mutex);
 305
 306         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, x, y, w, h);
 307
 308         return FALSE;
 309 }
 310
 311 static gboolean image_loader_emit_done_cb(gpointer data)
 312 {
 313         ImageLoader *il = data;
 314         g_signal_emit(il, signals[SIGNAL_DONE], 0);
 315         return FALSE;
 316 }
 317
 318 static gboolean image_loader_emit_error_cb(gpointer data)
 319 {
 320         ImageLoader *il = data;
 321         g_signal_emit(il, signals[SIGNAL_ERROR], 0);
 322         return FALSE;
 323 }
 324
 325 static gboolean image_loader_emit_percent_cb(gpointer data)
 326 {
 327         ImageLoader *il = data;
 328         g_signal_emit(il, signals[SIGNAL_PERCENT], 0, image_loader_get_percent(il));
 329         return FALSE;
 330 }
 331
 332 static gboolean image_loader_emit_size_cb(gpointer data)
 333 {
 334         gint width, height;
 335         ImageLoader *il = data;
 336         g_mutex_lock(il->data_mutex);
 337         width = il->actual_width;
 338         height = il->actual_height;
 339         g_mutex_unlock(il->data_mutex);
 340         g_signal_emit(il, signals[SIGNAL_SIZE], 0, width, height);
 341         return FALSE;
 342 }
 343
 344
 345 /* DONE and ERROR are emitted only once, thus they can have normal priority
 346    PERCENT and AREA_READY should be processed ASAP
 347 */
 348
 349 static void image_loader_emit_done(ImageLoader *il)
 350 {
 351         g_idle_add_full(il->idle_priority, image_loader_emit_done_cb, il, NULL);
 352 }
 353
 354 static void image_loader_emit_error(ImageLoader *il)
 355 {
 356         g_idle_add_full(il->idle_priority, image_loader_emit_error_cb, il, NULL);
 357 }
 358
 359 static void image_loader_emit_percent(ImageLoader *il)
 360 {
 361         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_percent_cb, il, NULL);
 362 }
 363
 364 static void image_loader_emit_size(ImageLoader *il)
 365 {
 366         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_size_cb, il, NULL);
 367 }
 368
 369 static ImageLoaderAreaParam *image_loader_queue_area_ready(ImageLoader *il, GList **list, guint x, guint y, guint w, guint h)
 370 {
 371         if (*list)
 372                 {
 373                 ImageLoaderAreaParam *prev_par = (*list)->data;
 374                 if (prev_par->x == x && prev_par->w == w &&
 375                     prev_par->y + prev_par->h == y)
 376                         {
 377                         /* we can merge the notifications */
 378                         prev_par->h += h;
 379                         return NULL;
 380                         }
 381                 if (prev_par->x == x && prev_par->w == w &&
 382                     y + h == prev_par->y)
 383                         {
 384                         /* we can merge the notifications */
 385                         prev_par->h += h;
 386                         prev_par->y = y;
 387                         return NULL;
 388                         }
 389                 if (prev_par->y == y && prev_par->h == h &&
 390                     prev_par->x + prev_par->w == x)
 391                         {
 392                         /* we can merge the notifications */
 393                         prev_par->w += w;
 394                         return NULL;
 395                         }
 396                 if (prev_par->y == y && prev_par->h == h &&
 397                     x + w == prev_par->x)
 398                         {
 399                         /* we can merge the notifications */
 400                         prev_par->w += w;
 401                         prev_par->x = x;
 402                         return NULL;
 403                         }
 404                 }
 405
 406         ImageLoaderAreaParam *par = g_new0(ImageLoaderAreaParam, 1);
 407         par->il = il;
 408         par->x = x;
 409         par->y = y;
 410         par->w = w;
 411         par->h = h;
 412
 413         *list = g_list_prepend(*list, par);
 414         return par;
 415 }
 416
 417 /* this function expects that il->data_mutex is locked by caller */
 418 static void image_loader_emit_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 419 {
 420         ImageLoaderAreaParam *par = image_loader_queue_area_ready(il, &il->area_param_list, x, y, w, h);
 421
 422         if (par)
 423                 {
 424                 g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_area_ready_cb, par, NULL);
 425                 }
 426 }
 427
 428 /**************************************************************************************/
 429 /* the following functions may be executed in separate thread */
 430
 431 /* this function expects that il->data_mutex is locked by caller */
 432 static void image_loader_queue_delayed_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 433 {
 434         image_loader_queue_area_ready(il, &il->area_param_delayed_list, x, y, w, h);
 435 }
 436
 437
 438
 439 static gboolean image_loader_get_stopping(ImageLoader *il)
 440 {
 441         gboolean ret;
 442         if (!il) return FALSE;
 443
 444         g_mutex_lock(il->data_mutex);
 445         ret = il->stopping;
 446         g_mutex_unlock(il->data_mutex);
 447
 448         return ret;
 449 }
 450
 451
 452 static void image_loader_sync_pixbuf(ImageLoader *il)
 453 {
 454         GdkPixbuf *pb;
 455
 456         g_mutex_lock(il->data_mutex);
 457
 458         if (!il->loader)
 459                 {
 460                 g_mutex_unlock(il->data_mutex);
 461                 return;
 462                 }
 463
 464         pb = il->backend.get_pixbuf(il->loader);
 465
 466         if (pb == il->pixbuf)
 467                 {
 468                 g_mutex_unlock(il->data_mutex);
 469                 return;
 470                 }
 471
 472         if (g_ascii_strcasecmp(".jps", il->fd->extension) == 0)
 473                 {
 474                 g_object_set_data(G_OBJECT(pb), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 475                 }
 476
 477         if (il->pixbuf) g_object_unref(il->pixbuf);
 478
 479         il->pixbuf = pb;
 480         if (il->pixbuf) g_object_ref(il->pixbuf);
 481
 482         g_mutex_unlock(il->data_mutex);
 483 }
 484
 485 static void image_loader_area_updated_cb(gpointer loader,
 486                                  guint x, guint y, guint w, guint h,
 487                                  gpointer data)
 488 {
 489         ImageLoader *il = data;
 490
 491         if (!image_loader_get_pixbuf(il))
 492                 {
 493                 image_loader_sync_pixbuf(il);
 494                 if (!image_loader_get_pixbuf(il))
 495                         {
 496                         log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
 497                         }
 498                 }
 499
 500         g_mutex_lock(il->data_mutex);
 501         if (il->delay_area_ready)
 502                 image_loader_queue_delayed_area_ready(il, x, y, w, h);
 503         else
 504                 image_loader_emit_area_ready(il, x, y, w, h);
 505
 506         if (il->stopping) il->backend.abort(il->loader);
 507
 508         g_mutex_unlock(il->data_mutex);
 509 }
 510
 511 static void image_loader_area_prepared_cb(gpointer loader, gpointer data)
 512 {
 513         ImageLoader *il = data;
 514         GdkPixbuf *pb;
 515         guchar *pix;
 516         size_t h, rs;
 517
 518         /* a workaround for
 519            http://bugzilla.gnome.org/show_bug.cgi?id=547669
 520            http://bugzilla.gnome.org/show_bug.cgi?id=589334
 521         */
 522         gchar *format = il->backend.get_format_name(loader);
 523         if (strcmp(format, "svg") == 0 ||
 524             strcmp(format, "xpm") == 0)
 525                 {
 526                 g_free(format);
 527                 return;
 528                 }
 529
 530         g_free(format);
 531
 532         pb = il->backend.get_pixbuf(loader);
 533
 534         h = gdk_pixbuf_get_height(pb);
 535         rs = gdk_pixbuf_get_rowstride(pb);
 536         pix = gdk_pixbuf_get_pixels(pb);
 537
 538         memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
 539
 540 }
 541
 542 static void image_loader_size_cb(gpointer loader,
 543                                  gint width, gint height, gpointer data)
 544 {
 545         ImageLoader *il = data;
 546         gchar **mime_types;
 547         gboolean scale = FALSE;
 548         gint n;
 549
 550         g_mutex_lock(il->data_mutex);
 551         il->actual_width = width;
 552         il->actual_height = height;
 553         if (il->requested_width < 1 || il->requested_height < 1)
 554                 {
 555                 g_mutex_unlock(il->data_mutex);
 556                 image_loader_emit_size(il);
 557                 return;
 558                 }
 559         g_mutex_unlock(il->data_mutex);
 560
 561 #ifdef HAVE_FFMPEGTHUMBNAILER
 562         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 563                 scale = TRUE;
 564 #endif
 565         mime_types = il->backend.get_format_mime_types(loader);
 566         n = 0;
 567         while (mime_types[n] && !scale)
 568                 {
 569                 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
 570                 n++;
 571                 }
 572         g_strfreev(mime_types);
 573
 574         if (!scale)
 575                 {
 576                 image_loader_emit_size(il);
 577                 return;
 578                 }
 579
 580         g_mutex_lock(il->data_mutex);
 581
 582         gint nw, nh;
 583         if (width > il->requested_width || height > il->requested_height)
 584                 {
 585
 586                 if (((gdouble)il->requested_width / width) < ((gdouble)il->requested_height / height))
 587                         {
 588                         nw = il->requested_width;
 589                         nh = (gdouble)nw / width * height;
 590                         if (nh < 1) nh = 1;
 591                         }
 592                 else
 593                         {
 594                         nh = il->requested_height;
 595                         nw = (gdouble)nh / height * width;
 596                         if (nw < 1) nw = 1;
 597                         }
 598
 599                 il->actual_width = nw;
 600                 il->actual_height = nh;
 601                 il->backend.set_size(loader, nw, nh);
 602                 il->shrunk = TRUE;
 603                 }
 604
 605         g_mutex_unlock(il->data_mutex);
 606         image_loader_emit_size(il);
 607 }
 608
 609 static void image_loader_stop_loader(ImageLoader *il)
 610 {
 611         if (!il) return;
 612
 613         if (il->loader)
 614                 {
 615                 /* some loaders do not have a pixbuf till close, order is important here */
 616                 il->backend.close(il->loader, il->error ? NULL : &il->error); /* we are interested in the first error only */
 617                 image_loader_sync_pixbuf(il);
 618                 il->backend.free(il->loader);
 619                 il->loader = NULL;
 620                 }
 621         g_mutex_lock(il->data_mutex);
 622         il->done = TRUE;
 623         g_mutex_unlock(il->data_mutex);
 624 }
 625
 626 static void image_loader_setup_loader(ImageLoader *il)
 627 {
 628 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 629         gchar *format;
 630 #endif
 631
 632         g_mutex_lock(il->data_mutex);
 633 #ifdef HAVE_FFMPEGTHUMBNAILER
 634         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 635                 {
 636                 DEBUG_1("Using custom ffmpegthumbnailer loader");
 637                 image_loader_backend_set_ft(&il->backend);
 638                 }
 639         else
 640 #endif
 641 #ifdef HAVE_PDF
 642         if (il->bytes_total >= 4 &&
 643             (memcmp(il->mapped_file + 0, "%PDF", 4) == 0))
 644                 {
 645                 DEBUG_1("Using custom pdf loader");
 646                 image_loader_backend_set_pdf(&il->backend);
 647                 }
 648         else
 649 #endif
 650 #ifdef HAVE_HEIF
 651         if (il->bytes_total >= 12 &&
 652                 ((memcmp(il->mapped_file + 4, "ftypheic", 8) == 0) ||
 653                 (memcmp(il->mapped_file + 4, "ftypmsf1", 8) == 0) ||
 654                 (memcmp(il->mapped_file + 4, "ftypmif1", 8) == 0)))
 655                 {
 656                 DEBUG_1("Using custom heif loader");
 657                 image_loader_backend_set_heif(&il->backend);
 658                 }
 659         else
 660 #endif
 661 #ifdef HAVE_WEBP
 662         if (il->bytes_total >= 12 &&
 663                 (memcmp(il->mapped_file, "RIFF", 4) == 0) &&
 664                 (memcmp(il->mapped_file + 8, "WEBP", 4) == 0))
 665                 {
 666                 DEBUG_1("Using custom webp loader");
 667                 image_loader_backend_set_webp(&il->backend);
 668                 }
 669         else
 670 #endif
 671 #ifdef HAVE_DJVU
 672         if (il->bytes_total >= 16 &&
 673                 (memcmp(il->mapped_file, "AT&TFORM", 8) == 0) &&
 674                 (memcmp(il->mapped_file + 12, "DJV", 3) == 0))
 675                 {
 676                 DEBUG_1("Using custom djvu loader");
 677                 image_loader_backend_set_djvu(&il->backend);
 678                 }
 679         else
 680 #endif
 681 #ifdef HAVE_JPEG
 682         if (il->bytes_total >= 2 && il->mapped_file[0] == 0xff && il->mapped_file[1] == 0xd8)
 683                 {
 684                 DEBUG_1("Using custom jpeg loader");
 685                 image_loader_backend_set_jpeg(&il->backend);
 686                 }
 687 #ifndef HAVE_RAW
 688         else
 689         if (il->bytes_total >= 11 &&
 690                 (memcmp(il->mapped_file + 4, "ftypcrx", 7) == 0) &&
 691                 (memcmp(il->mapped_file + 64, "CanonCR3", 8) == 0))
 692                 {
 693                 DEBUG_1("Using custom cr3 loader");
 694                 image_loader_backend_set_cr3(&il->backend);
 695                 }
 696 #endif
 697         else
 698 #endif
 699 #ifdef HAVE_TIFF
 700         if (il->bytes_total >= 10 &&
 701             (memcmp(il->mapped_file, "MM\0*", 4) == 0 ||
 702              memcmp(il->mapped_file, "MM\0+\0\x08\0\0", 8) == 0 ||
 703              memcmp(il->mapped_file, "II+\0\x08\0\0\0", 8) == 0 ||
 704              memcmp(il->mapped_file, "II*\0", 4) == 0))
 705                 {
 706                 DEBUG_1("Using custom tiff loader");
 707                 image_loader_backend_set_tiff(&il->backend);
 708                 }
 709         else
 710 #endif
 711         if (il->bytes_total >= 3 && il->mapped_file[0] == 0x44 && il->mapped_file[1] == 0x44 && il->mapped_file[2] == 0x53)
 712                 {
 713                 DEBUG_1("Using dds loader");
 714                 image_loader_backend_set_dds(&il->backend);
 715                 }
 716         else
 717         if (il->bytes_total >= 6 &&
 718                 (memcmp(il->mapped_file, "8BPS\0\x01", 6) == 0))
 719                 {
 720                 DEBUG_1("Using custom psd loader");
 721                 image_loader_backend_set_psd(&il->backend);
 722                 }
 723         else
 724 #ifdef HAVE_J2K
 725         if (il->bytes_total >= 12 &&
 726                 (memcmp(il->mapped_file, "\0\0\0\x0CjP\x20\x20\x0D\x0A\x87\x0A", 12) == 0))
 727                 {
 728                 DEBUG_1("Using custom j2k loader");
 729                 image_loader_backend_set_j2k(&il->backend);
 730                 }
 731         else
 732 #endif
 733         if (il->fd->format_class == FORMAT_CLASS_COLLECTION)
 734                 {
 735                 DEBUG_1("Using custom collection loader");
 736                 image_loader_backend_set_collection(&il->backend);
 737                 }
 738         else
 739         if (g_strcmp0(strrchr(il->fd->path, '.'), ".svgz") == 0)
 740                 {
 741                 DEBUG_1("Using custom svgz loader");
 742                 image_loader_backend_set_svgz(&il->backend);
 743                 }
 744         else
 745                 image_loader_backend_set_default(&il->backend);
 746
 747         il->loader = il->backend.loader_new(image_loader_area_updated_cb, image_loader_size_cb, image_loader_area_prepared_cb, il);
 748
 749 #ifdef HAVE_TIFF
 750         format = il->backend.get_format_name(il->loader);
 751         if (g_strcmp0(format, "tiff") == 0)
 752                 {
 753                 il->backend.set_page_num(il->loader, il->fd->page_num);
 754                 }
 755         g_free(format);
 756 #endif
 757
 758 #ifdef HAVE_PDF
 759         format = il->backend.get_format_name(il->loader);
 760         if (g_strcmp0(format, "pdf") == 0)
 761                 {
 762                 il->backend.set_page_num(il->loader, il->fd->page_num);
 763                 }
 764         g_free(format);
 765 #endif
 766
 767 #ifdef HAVE_HEIF
 768         format = il->backend.get_format_name(il->loader);
 769         if (g_strcmp0(format, "heif") == 0)
 770                 {
 771                 il->backend.set_page_num(il->loader, il->fd->page_num);
 772                 }
 773         g_free(format);
 774 #endif
 775
 776 #ifdef HAVE_DJVU
 777         format = il->backend.get_format_name(il->loader);
 778         if (g_strcmp0(format, "djvu") == 0)
 779                 {
 780                 il->backend.set_page_num(il->loader, il->fd->page_num);
 781                 }
 782         g_free(format);
 783 #endif
 784
 785         g_mutex_unlock(il->data_mutex);
 786 }
 787
 788
 789 static void image_loader_done(ImageLoader *il)
 790 {
 791         image_loader_stop_loader(il);
 792
 793         image_loader_emit_done(il);
 794 }
 795
 796 static void image_loader_error(ImageLoader *il)
 797 {
 798         image_loader_stop_loader(il);
 799
 800         DEBUG_1("pixbuf_loader reported load error for: %s", il->fd->path);
 801
 802         image_loader_emit_error(il);
 803 }
 804
 805 static gboolean image_loader_continue(ImageLoader *il)
 806 {
 807         gint b;
 808         gint c;
 809
 810         if (!il) return FALSE;
 811
 812         c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
 813         while (c > 0 && !image_loader_get_stopping(il))
 814                 {
 815                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 816
 817                 if (b == 0)
 818                         {
 819                         image_loader_done(il);
 820                         return FALSE;
 821                         }
 822
 823                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 824                         {
 825                         image_loader_error(il);
 826                         return FALSE;
 827                         }
 828
 829                 il->bytes_read += b;
 830
 831                 c--;
 832                 }
 833
 834         if (il->bytes_total > 0)
 835                 {
 836                 image_loader_emit_percent(il);
 837                 }
 838
 839         return TRUE;
 840 }
 841
 842 static gboolean image_loader_begin(ImageLoader *il)
 843 {
 844 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 845         gchar *format;
 846 #endif
 847         gssize b;
 848
 849         if (il->pixbuf) return FALSE;
 850
 851         b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 852         if (b < 1) return FALSE;
 853
 854         image_loader_setup_loader(il);
 855
 856         g_assert(il->bytes_read == 0);
 857         if (il->backend.load) {
 858                 b = il->bytes_total;
 859                 if (!il->backend.load(il->loader, il->mapped_file, b, &il->error))
 860                         {
 861                         image_loader_stop_loader(il);
 862                         return FALSE;
 863                         }
 864         }
 865         else if (!il->backend.write(il->loader, il->mapped_file, b, &il->error))
 866                 {
 867                 image_loader_stop_loader(il);
 868                 return FALSE;
 869                 }
 870
 871 #ifdef HAVE_PDF
 872         format = il->backend.get_format_name(il->loader);
 873         if (g_strcmp0(format, "pdf") == 0)
 874                 {
 875                 gint i = il->backend.get_page_total(il->loader);
 876                 file_data_set_page_total(il->fd, i);
 877                 }
 878         g_free(format);
 879 #endif
 880 #ifdef HAVE_HEIF
 881         format = il->backend.get_format_name(il->loader);
 882         if (g_strcmp0(format, "heif") == 0)
 883                 {
 884                 gint i = il->backend.get_page_total(il->loader);
 885                 file_data_set_page_total(il->fd, i);
 886                 }
 887         g_free(format);
 888 #endif
 889 #ifdef HAVE_DJVU
 890         format = il->backend.get_format_name(il->loader);
 891         if (g_strcmp0(format, "djvu") == 0)
 892                 {
 893                 gint i = il->backend.get_page_total(il->loader);
 894                 file_data_set_page_total(il->fd, i);
 895                 }
 896         g_free(format);
 897 #endif
 898 #ifdef HAVE_TIFF
 899         format = il->backend.get_format_name(il->loader);
 900         if (g_strcmp0(format, "tiff") == 0)
 901                 {
 902                 gint i = il->backend.get_page_total(il->loader);
 903                 file_data_set_page_total(il->fd, i);
 904                 }
 905         g_free(format);
 906 #endif
 907
 908         il->bytes_read += b;
 909
 910         /* read until size is known */
 911         while (il->loader && !il->backend.get_pixbuf(il->loader) && b > 0 && !image_loader_get_stopping(il))
 912                 {
 913                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 914                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 915                         {
 916                         image_loader_stop_loader(il);
 917                         return FALSE;
 918                         }
 919                 il->bytes_read += b;
 920                 }
 921         if (!il->pixbuf) image_loader_sync_pixbuf(il);
 922
 923         if (il->bytes_read == il->bytes_total || b < 1)
 924                 {
 925                 /* done, handle (broken) loaders that do not have pixbuf till close */
 926                 image_loader_stop_loader(il);
 927
 928                 if (!il->pixbuf) return FALSE;
 929
 930                 image_loader_done(il);
 931                 return TRUE;
 932                 }
 933
 934         if (!il->pixbuf)
 935                 {
 936                 image_loader_stop_loader(il);
 937                 return FALSE;
 938                 }
 939
 940         return TRUE;
 941 }
 942
 943 /**************************************************************************************/
 944 /* the following functions are always executed in the main thread */
 945
 946
 947 static gboolean image_loader_setup_source(ImageLoader *il)
 948 {
 949         struct stat st;
 950         gchar *pathl;
 951
 952         if (!il || il->loader || il->mapped_file) return FALSE;
 953
 954         il->mapped_file = NULL;
 955
 956         if (il->fd)
 957                 {
 958                 ExifData *exif = exif_read_fd(il->fd);
 959
 960                 if (options->thumbnails.use_exif)
 961                         {
 962                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, il->requested_width, il->requested_height);
 963
 964                         if (il->mapped_file)
 965                                 {
 966                                 il->preview = IMAGE_LOADER_PREVIEW_EXIF;
 967                                 }
 968                         }
 969                 else
 970                         {
 971                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, 0, 0); /* get the largest available preview image or NULL for normal images*/
 972
 973                         if (il->mapped_file)
 974                                 {
 975                                 il->preview = IMAGE_LOADER_PREVIEW_EXIF;
 976                                 }
 977                         }
 978
 979                 /* If exiv2 does not find a thumbnail, try libraw (which may be slower) */
 980                 if (!il->mapped_file)
 981                         {
 982                         il->mapped_file = libraw_get_preview(il, (guint *)&il->bytes_total);
 983
 984                         if (il->mapped_file)
 985                                 {
 986                                 il->preview = IMAGE_LOADER_PREVIEW_LIBRAW;
 987                                 }
 988                         }
 989
 990                 if (il->mapped_file)
 991                         {
 992                         DEBUG_1("Usable reduced size (preview) image loaded from file %s", il->fd->path);
 993                         }
 994                 exif_free_fd(il->fd, exif);
 995                 }
 996
 997
 998         if (!il->mapped_file)
 999                 {
1000                 /* normal file */
1001                 gint load_fd;
1002
1003                 pathl = path_from_utf8(il->fd->path);
1004                 load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
1005                 g_free(pathl);
1006                 if (load_fd == -1) return FALSE;
1007
1008                 if (fstat(load_fd, &st) == 0)
1009                         {
1010                         il->bytes_total = st.st_size;
1011                         }
1012                 else
1013                         {
1014                         close(load_fd);
1015                         return FALSE;
1016                         }
1017
1018                 il->mapped_file = mmap(0, il->bytes_total, PROT_READ|PROT_WRITE, MAP_PRIVATE, load_fd, 0);
1019                 close(load_fd);
1020                 if (il->mapped_file == MAP_FAILED)
1021                         {
1022                         il->mapped_file = 0;
1023                         return FALSE;
1024                         }
1025                 il->preview = IMAGE_LOADER_PREVIEW_NONE;
1026                 }
1027
1028         return TRUE;
1029 }
1030
1031 static void image_loader_stop_source(ImageLoader *il)
1032 {
1033         if (!il) return;
1034
1035         if (il->mapped_file)
1036                 {
1037                 if (il->preview == IMAGE_LOADER_PREVIEW_EXIF)
1038                         {
1039                         exif_free_preview(il->mapped_file);
1040                         }
1041                 else if (il->preview == IMAGE_LOADER_PREVIEW_LIBRAW)
1042                         {
1043                         libraw_free_preview(il->mapped_file);
1044                         }
1045                 else
1046                         {
1047                         munmap(il->mapped_file, il->bytes_total);
1048                         }
1049                 il->mapped_file = NULL;
1050                 }
1051 }
1052
1053 static void image_loader_stop(ImageLoader *il)
1054 {
1055         if (!il) return;
1056
1057         if (il->idle_id)
1058                 {
1059                 g_source_remove(il->idle_id);
1060                 il->idle_id = 0;
1061                 }
1062
1063         if (il->thread)
1064                 {
1065                 /* stop loader in the other thread */
1066                 g_mutex_lock(il->data_mutex);
1067                 il->stopping = TRUE;
1068                 while (!il->can_destroy) g_cond_wait(il->can_destroy_cond, il->data_mutex);
1069                 g_mutex_unlock(il->data_mutex);
1070                 }
1071
1072         image_loader_stop_loader(il);
1073         image_loader_stop_source(il);
1074
1075 }
1076
1077 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable)
1078 {
1079         g_mutex_lock(il->data_mutex);
1080         il->delay_area_ready = enable;
1081         if (!enable)
1082                 {
1083                 /* send delayed */
1084                 GList *list, *work;
1085                 list = g_list_reverse(il->area_param_delayed_list);
1086                 il->area_param_delayed_list = NULL;
1087                 g_mutex_unlock(il->data_mutex);
1088
1089                 work = list;
1090
1091                 while (work)
1092                         {
1093                         ImageLoaderAreaParam *par = work->data;
1094                         work = work->next;
1095
1096                         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, par->x, par->y, par->w, par->h);
1097                         g_free(par);
1098                         }
1099                 g_list_free(list);
1100                 }
1101         else
1102                 {
1103                 /* just unlock */
1104                 g_mutex_unlock(il->data_mutex);
1105                 }
1106 }
1107
1108
1109 /**************************************************************************************/
1110 /* execution via idle calls */
1111
1112 static gboolean image_loader_idle_cb(gpointer data)
1113 {
1114         gboolean ret = FALSE;
1115         ImageLoader *il = data;
1116
1117         if (il->idle_id)
1118                 {
1119                 ret = image_loader_continue(il);
1120                 }
1121
1122         if (!ret)
1123                 {
1124                 image_loader_stop_source(il);
1125                 }
1126
1127         return ret;
1128 }
1129
1130
1131 static gboolean image_loader_start_idle(ImageLoader *il)
1132 {
1133         gboolean ret;
1134
1135         if (!il) return FALSE;
1136
1137         if (!il->fd) return FALSE;
1138
1139         if (!image_loader_setup_source(il)) return FALSE;
1140
1141         ret = image_loader_begin(il);
1142
1143         if (ret && !il->done) il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, NULL);
1144         return ret;
1145 }
1146
1147 /**************************************************************************************/
1148 /* execution via thread */
1149
1150 #ifdef HAVE_GTHREAD
1151 static GThreadPool *image_loader_thread_pool = NULL;
1152
1153 static GCond *image_loader_prio_cond = NULL;
1154 static GMutex *image_loader_prio_mutex = NULL;
1155 static gint image_loader_prio_num = 0;
1156
1157
1158 static void image_loader_thread_enter_high(void)
1159 {
1160         g_mutex_lock(image_loader_prio_mutex);
1161         image_loader_prio_num++;
1162         g_mutex_unlock(image_loader_prio_mutex);
1163 }
1164
1165 static void image_loader_thread_leave_high(void)
1166 {
1167         g_mutex_lock(image_loader_prio_mutex);
1168         image_loader_prio_num--;
1169         if (image_loader_prio_num == 0) g_cond_broadcast(image_loader_prio_cond); /* wake up all low prio threads */
1170         g_mutex_unlock(image_loader_prio_mutex);
1171 }
1172
1173 static void image_loader_thread_wait_high(void)
1174 {
1175         g_mutex_lock(image_loader_prio_mutex);
1176         while (image_loader_prio_num)
1177                 {
1178                 g_cond_wait(image_loader_prio_cond, image_loader_prio_mutex);
1179                 }
1180
1181         g_mutex_unlock(image_loader_prio_mutex);
1182 }
1183
1184
1185 static void image_loader_thread_run(gpointer data, gpointer user_data)
1186 {
1187         ImageLoader *il = data;
1188         gboolean cont;
1189         gboolean err;
1190
1191         if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1192                 {
1193                 /* low prio, wait until high prio tasks finishes */
1194                 image_loader_thread_wait_high();
1195                 }
1196         else
1197                 {
1198                 /* high prio */
1199                 image_loader_thread_enter_high();
1200                 }
1201
1202         err = !image_loader_begin(il);
1203
1204         if (err)
1205                 {
1206                 /*
1207                 loader failed, we have to send signal
1208                 (idle mode returns the image_loader_begin return value directly)
1209                 (success is always reported indirectly from image_loader_begin)
1210                 */
1211                 image_loader_emit_error(il);
1212                 }
1213
1214         cont = !err;
1215
1216         while (cont && !image_loader_get_is_done(il) && !image_loader_get_stopping(il))
1217                 {
1218                 if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1219                         {
1220                         /* low prio, wait until high prio tasks finishes */
1221                         image_loader_thread_wait_high();
1222                         }
1223                 cont = image_loader_continue(il);
1224                 }
1225         image_loader_stop_loader(il);
1226
1227         if (il->idle_priority <= G_PRIORITY_DEFAULT_IDLE)
1228                 {
1229                 /* high prio */
1230                 image_loader_thread_leave_high();
1231                 }
1232
1233         g_mutex_lock(il->data_mutex);
1234         il->can_destroy = TRUE;
1235         g_cond_signal(il->can_destroy_cond);
1236         g_mutex_unlock(il->data_mutex);
1237
1238 }
1239
1240
1241 static gboolean image_loader_start_thread(ImageLoader *il)
1242 {
1243         if (!il) return FALSE;
1244
1245         if (!il->fd) return FALSE;
1246
1247         il->thread = TRUE;
1248
1249         if (!image_loader_setup_source(il)) return FALSE;
1250
1251         if (!image_loader_thread_pool)
1252                 {
1253                 image_loader_thread_pool = g_thread_pool_new(image_loader_thread_run, NULL, -1, FALSE, NULL);
1254 #if GLIB_CHECK_VERSION(2,32,0)
1255                 if (!image_loader_prio_cond) image_loader_prio_cond = g_new(GCond, 1);
1256                 g_cond_init(image_loader_prio_cond);
1257                 if (!image_loader_prio_mutex) image_loader_prio_mutex = g_new(GMutex, 1);
1258                 g_mutex_init(image_loader_prio_mutex);
1259 #else
1260                 image_loader_prio_cond = g_cond_new();
1261                 image_loader_prio_mutex = g_mutex_new();
1262 #endif
1263                 }
1264
1265         il->can_destroy = FALSE; /* ImageLoader can't be freed until image_loader_thread_run finishes */
1266
1267         g_thread_pool_push(image_loader_thread_pool, il, NULL);
1268         DEBUG_1("Thread pool num threads: %d", g_thread_pool_get_num_threads(image_loader_thread_pool));
1269
1270         return TRUE;
1271 }
1272 #endif /* HAVE_GTHREAD */
1273
1274
1275 /**************************************************************************************/
1276 /* public interface */
1277
1278
1279 gboolean image_loader_start(ImageLoader *il)
1280 {
1281         if (!il) return FALSE;
1282
1283         if (!il->fd) return FALSE;
1284
1285 #ifdef HAVE_GTHREAD
1286         return image_loader_start_thread(il);
1287 #else
1288         return image_loader_start_idle(il);
1289 #endif
1290 }
1291
1292
1293 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
1294 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
1295 {
1296         GdkPixbuf *ret;
1297         if (!il) return NULL;
1298
1299         g_mutex_lock(il->data_mutex);
1300         ret = il->pixbuf;
1301         g_mutex_unlock(il->data_mutex);
1302         return ret;
1303 }
1304
1305 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
1306 {
1307         if (!il) return;
1308
1309         g_mutex_lock(il->data_mutex);
1310         il->requested_width = width;
1311         il->requested_height = height;
1312         g_mutex_unlock(il->data_mutex);
1313 }
1314
1315 void image_loader_set_buffer_size(ImageLoader *il, guint count)
1316 {
1317         if (!il) return;
1318
1319         g_mutex_lock(il->data_mutex);
1320         il->idle_read_loop_count = count ? count : 1;
1321         g_mutex_unlock(il->data_mutex);
1322 }
1323
1324 void image_loader_set_priority(ImageLoader *il, gint priority)
1325 {
1326         if (!il) return;
1327
1328         if (il->thread) return; /* can't change prio if the thread already runs */
1329         il->idle_priority = priority;
1330 }
1331
1332
1333 gdouble image_loader_get_percent(ImageLoader *il)
1334 {
1335         gdouble ret;
1336         if (!il) return 0.0;
1337
1338         g_mutex_lock(il->data_mutex);
1339         if (il->bytes_total == 0)
1340                 {
1341                 ret = 0.0;
1342                 }
1343         else
1344                 {
1345                 ret = (gdouble)il->bytes_read / il->bytes_total;
1346                 }
1347         g_mutex_unlock(il->data_mutex);
1348         return ret;
1349 }
1350
1351 gboolean image_loader_get_is_done(ImageLoader *il)
1352 {
1353         gboolean ret;
1354         if (!il) return FALSE;
1355
1356         g_mutex_lock(il->data_mutex);
1357         ret = il->done;
1358         g_mutex_unlock(il->data_mutex);
1359
1360         return ret;
1361 }
1362
1363 FileData *image_loader_get_fd(ImageLoader *il)
1364 {
1365         FileData *ret;
1366         if (!il) return NULL;
1367
1368         g_mutex_lock(il->data_mutex);
1369         ret = il->fd;
1370         g_mutex_unlock(il->data_mutex);
1371
1372         return ret;
1373 }
1374
1375 gboolean image_loader_get_shrunk(ImageLoader *il)
1376 {
1377         gboolean ret;
1378         if (!il) return FALSE;
1379
1380         g_mutex_lock(il->data_mutex);
1381         ret = il->shrunk;
1382         g_mutex_unlock(il->data_mutex);
1383         return ret;
1384 }
1385
1386 const gchar *image_loader_get_error(ImageLoader *il)
1387 {
1388         const gchar *ret = NULL;
1389         if (!il) return NULL;
1390         g_mutex_lock(il->data_mutex);
1391         if (il->error) ret = il->error->message;
1392         g_mutex_unlock(il->data_mutex);
1393         return ret;
1394 }
1395
1396
1397 /**
1398  *  @FIXME this can be rather slow and blocks until the size is known
1399  */
1400 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height)
1401 {
1402         ImageLoader *il;
1403         gboolean success;
1404
1405         il = image_loader_new(fd);
1406
1407         success = image_loader_start_idle(il);
1408
1409         if (success && il->pixbuf)
1410                 {
1411                 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
1412                 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
1413                 }
1414         else
1415                 {
1416                 if (width) *width = -1;
1417                 if (height) *height = -1;
1418                 }
1419
1420         image_loader_free(il);
1421
1422         return success;
1423 }
1424 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */