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 "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-external.h"
  31 #include "image-load-pdf.h"
  32 #include "image-load-psd.h"
  33 #include "image-load-heif.h"
  34 #include "image-load-ffmpegthumbnailer.h"
  35 #include "image-load-collection.h"
  36 #include "image-load-zxscr.h"
  37 #include "image-load-j2k.h"
  38 #include "image-load-jpegxl.h"
  39 #include "image-load-libraw.h"
  40 #include "image-load-svgz.h"
  41 #include "misc.h"
  42
  43 #include "exif.h"
  44 #include "filedata.h"
  45 #include "ui-fileops.h"
  46 #include "gq-marshal.h"
  47
  48 #include <fcntl.h>
  49 #include <sys/mman.h>
  50
  51 #define IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT   4096
  52 #define IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT       1
  53
  54 /* image loader class */
  55
  56
  57 enum {
  58         SIGNAL_AREA_READY = 0,
  59         SIGNAL_ERROR,
  60         SIGNAL_DONE,
  61         SIGNAL_PERCENT,
  62         SIGNAL_SIZE,
  63         SIGNAL_COUNT
  64 };
  65
  66 static guint signals[SIGNAL_COUNT] = { 0 };
  67
  68 static void image_loader_init(GTypeInstance *instance, gpointer g_class);
  69 static void image_loader_class_init_wrapper(void *data, void *user_data);
  70 static void image_loader_class_init(ImageLoaderClass *loader_class);
  71 static void image_loader_finalize(GObject *object);
  72 static void image_loader_stop(ImageLoader *il);
  73
  74 GType image_loader_get_type(void)
  75 {
  76         static GType type = 0;
  77         if (type == 0)
  78                 {
  79                 static const GTypeInfo info = {
  80                         sizeof(ImageLoaderClass),
  81                         NULL,   /* base_init */
  82                         NULL,   /* base_finalize */
  83                         (GClassInitFunc)image_loader_class_init_wrapper, /* class_init */
  84                         NULL,   /* class_finalize */
  85                         NULL,   /* class_data */
  86                         sizeof(ImageLoader),
  87                         0,      /* n_preallocs */
  88                         (GInstanceInitFunc)image_loader_init, /* instance_init */
  89                         NULL    /* value_table */
  90                         };
  91                 type = g_type_register_static(G_TYPE_OBJECT, "ImageLoaderType", &info, GTypeFlags(0));
  92                 }
  93         return type;
  94 }
  95
  96 static void image_loader_init(GTypeInstance *instance, gpointer UNUSED(g_class))
  97 {
  98         ImageLoader *il = (ImageLoader *)instance;
  99
 100         il->pixbuf = NULL;
 101         il->idle_id = 0;
 102         il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
 103         il->done = FALSE;
 104         il->loader = NULL;
 105
 106         il->bytes_read = 0;
 107         il->bytes_total = 0;
 108
 109         il->idle_done_id = 0;
 110
 111         il->idle_read_loop_count = IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT;
 112         il->read_buffer_size = IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT;
 113         il->mapped_file = NULL;
 114         il->preview = IMAGE_LOADER_PREVIEW_NONE;
 115
 116         il->requested_width = 0;
 117         il->requested_height = 0;
 118         il->actual_width = 0;
 119         il->actual_height = 0;
 120         il->shrunk = FALSE;
 121
 122         il->can_destroy = TRUE;
 123
 124         il->data_mutex = g_new(GMutex, 1);
 125         g_mutex_init(il->data_mutex);
 126         il->can_destroy_cond = g_new(GCond, 1);
 127         g_cond_init(il->can_destroy_cond);
 128
 129         DEBUG_1("new image loader %p, bufsize=%" G_GSIZE_FORMAT " idle_loop=%u", (void *)il, il->read_buffer_size, il->idle_read_loop_count);
 130 }
 131
 132 static void image_loader_class_init_wrapper(void *data, void *UNUSED(user_data))
 133 {
 134         image_loader_class_init(static_cast<ImageLoaderClass *>(data));
 135 }
 136
 137 static void image_loader_class_init(ImageLoaderClass *loader_class)
 138 {
 139         GObjectClass *gobject_class = G_OBJECT_CLASS (loader_class);
 140
 141 //      gobject_class->set_property = image_loader_set_property;
 142 //      gobject_class->get_property = image_loader_get_property;
 143
 144         gobject_class->finalize = image_loader_finalize;
 145
 146
 147         signals[SIGNAL_AREA_READY] =
 148                 g_signal_new("area_ready",
 149                              G_OBJECT_CLASS_TYPE(gobject_class),
 150                              G_SIGNAL_RUN_LAST,
 151                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 152                              NULL, NULL,
 153                              gq_marshal_VOID__INT_INT_INT_INT,
 154                              G_TYPE_NONE, 4,
 155                              G_TYPE_INT,
 156                              G_TYPE_INT,
 157                              G_TYPE_INT,
 158                              G_TYPE_INT);
 159
 160         signals[SIGNAL_ERROR] =
 161                 g_signal_new("error",
 162                              G_OBJECT_CLASS_TYPE(gobject_class),
 163                              G_SIGNAL_RUN_LAST,
 164                              G_STRUCT_OFFSET(ImageLoaderClass, error),
 165                              NULL, NULL,
 166                              g_cclosure_marshal_VOID__VOID,
 167                              G_TYPE_NONE, 0);
 168
 169         signals[SIGNAL_DONE] =
 170                 g_signal_new("done",
 171                              G_OBJECT_CLASS_TYPE(gobject_class),
 172                              G_SIGNAL_RUN_LAST,
 173                              G_STRUCT_OFFSET(ImageLoaderClass, done),
 174                              NULL, NULL,
 175                              g_cclosure_marshal_VOID__VOID,
 176                              G_TYPE_NONE, 0);
 177
 178         signals[SIGNAL_PERCENT] =
 179                 g_signal_new("percent",
 180                              G_OBJECT_CLASS_TYPE(gobject_class),
 181                              G_SIGNAL_RUN_LAST,
 182                              G_STRUCT_OFFSET(ImageLoaderClass, percent),
 183                              NULL, NULL,
 184                              g_cclosure_marshal_VOID__DOUBLE,
 185                              G_TYPE_NONE, 1,
 186                              G_TYPE_DOUBLE);
 187
 188         signals[SIGNAL_SIZE] =
 189                 g_signal_new("size_prepared",
 190                              G_OBJECT_CLASS_TYPE(gobject_class),
 191                              G_SIGNAL_RUN_LAST,
 192                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 193                              NULL, NULL,
 194                              gq_marshal_VOID__INT_INT,
 195                              G_TYPE_NONE, 2,
 196                              G_TYPE_INT,
 197                              G_TYPE_INT);
 198
 199 }
 200
 201 static void image_loader_finalize(GObject *object)
 202 {
 203         ImageLoader *il = (ImageLoader *)object;
 204
 205         image_loader_stop(il);
 206
 207         if (il->error) DEBUG_1("%s", image_loader_get_error(il));
 208
 209         DEBUG_1("freeing image loader %p bytes_read=%" G_GSIZE_FORMAT, (void *)il, il->bytes_read);
 210
 211         if (il->idle_done_id)
 212                 {
 213                 g_source_remove(il->idle_done_id);
 214                 il->idle_done_id = 0;
 215                 }
 216
 217         while (g_source_remove_by_user_data(il))
 218                 {
 219                 DEBUG_2("pending signals detected");
 220                 }
 221
 222         while (il->area_param_list)
 223                 {
 224                 DEBUG_1("pending area_ready signals detected");
 225                 while (g_source_remove_by_user_data(il->area_param_list->data)) {}
 226                 g_free(il->area_param_list->data);
 227                 il->area_param_list = g_list_delete_link(il->area_param_list, il->area_param_list);
 228                 }
 229
 230         while (il->area_param_delayed_list)
 231                 {
 232                 g_free(il->area_param_delayed_list->data);
 233                 il->area_param_delayed_list = g_list_delete_link(il->area_param_delayed_list, il->area_param_delayed_list);
 234                 }
 235
 236         if (il->pixbuf) g_object_unref(il->pixbuf);
 237
 238         if (il->error) g_error_free(il->error);
 239
 240         file_data_unref(il->fd);
 241
 242         g_mutex_clear(il->data_mutex);
 243         g_free(il->data_mutex);
 244         g_cond_clear(il->can_destroy_cond);
 245         g_free(il->can_destroy_cond);
 246 }
 247
 248 void image_loader_free(ImageLoader *il)
 249 {
 250         if (!il) return;
 251         g_object_unref(G_OBJECT(il));
 252 }
 253
 254
 255 ImageLoader *image_loader_new(FileData *fd)
 256 {
 257         ImageLoader *il;
 258
 259         if (!fd) return NULL;
 260
 261         il = (ImageLoader *) g_object_new(TYPE_IMAGE_LOADER, NULL);
 262
 263         il->fd = file_data_ref(fd);
 264
 265         return il;
 266 }
 267
 268 /**************************************************************************************/
 269 /* send signals via idle calbacks - the callback are executed in the main thread */
 270
 271 typedef struct _ImageLoaderAreaParam ImageLoaderAreaParam;
 272 struct _ImageLoaderAreaParam {
 273         ImageLoader *il;
 274         guint x;
 275         guint y;
 276         guint w;
 277         guint h;
 278 };
 279
 280
 281 static gboolean image_loader_emit_area_ready_cb(gpointer data)
 282 {
 283         ImageLoaderAreaParam *par = static_cast<ImageLoaderAreaParam *>(data);
 284         ImageLoader *il = par->il;
 285         guint x, y, w, h;
 286         g_mutex_lock(il->data_mutex);
 287         il->area_param_list = g_list_remove(il->area_param_list, par);
 288         x = par->x;
 289         y = par->y;
 290         w = par->w;
 291         h = par->h;
 292         g_free(par);
 293         g_mutex_unlock(il->data_mutex);
 294
 295         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, x, y, w, h);
 296
 297         return FALSE;
 298 }
 299
 300 static gboolean image_loader_emit_done_cb(gpointer data)
 301 {
 302         ImageLoader *il = static_cast<ImageLoader *>(data);
 303         g_signal_emit(il, signals[SIGNAL_DONE], 0);
 304         return FALSE;
 305 }
 306
 307 static gboolean image_loader_emit_error_cb(gpointer data)
 308 {
 309         ImageLoader *il = static_cast<ImageLoader *>(data);
 310         g_signal_emit(il, signals[SIGNAL_ERROR], 0);
 311         return FALSE;
 312 }
 313
 314 static gboolean image_loader_emit_percent_cb(gpointer data)
 315 {
 316         ImageLoader *il = static_cast<ImageLoader *>(data);
 317         g_signal_emit(il, signals[SIGNAL_PERCENT], 0, image_loader_get_percent(il));
 318         return FALSE;
 319 }
 320
 321 static gboolean image_loader_emit_size_cb(gpointer data)
 322 {
 323         gint width, height;
 324         ImageLoader *il = static_cast<ImageLoader *>(data);
 325         g_mutex_lock(il->data_mutex);
 326         width = il->actual_width;
 327         height = il->actual_height;
 328         g_mutex_unlock(il->data_mutex);
 329         g_signal_emit(il, signals[SIGNAL_SIZE], 0, width, height);
 330         return FALSE;
 331 }
 332
 333
 334 /* DONE and ERROR are emitted only once, thus they can have normal priority
 335    PERCENT and AREA_READY should be processed ASAP
 336 */
 337
 338 static void image_loader_emit_done(ImageLoader *il)
 339 {
 340         g_idle_add_full(il->idle_priority, image_loader_emit_done_cb, il, NULL);
 341 }
 342
 343 static void image_loader_emit_error(ImageLoader *il)
 344 {
 345         g_idle_add_full(il->idle_priority, image_loader_emit_error_cb, il, NULL);
 346 }
 347
 348 static void image_loader_emit_percent(ImageLoader *il)
 349 {
 350         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_percent_cb, il, NULL);
 351 }
 352
 353 static void image_loader_emit_size(ImageLoader *il)
 354 {
 355         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_size_cb, il, NULL);
 356 }
 357
 358 static ImageLoaderAreaParam *image_loader_queue_area_ready(ImageLoader *il, GList **list, guint x, guint y, guint w, guint h)
 359 {
 360         if (*list)
 361                 {
 362                 ImageLoaderAreaParam *prev_par = static_cast<ImageLoaderAreaParam *>((*list)->data);
 363                 if (prev_par->x == x && prev_par->w == w &&
 364                     prev_par->y + prev_par->h == y)
 365                         {
 366                         /* we can merge the notifications */
 367                         prev_par->h += h;
 368                         return NULL;
 369                         }
 370                 if (prev_par->x == x && prev_par->w == w &&
 371                     y + h == prev_par->y)
 372                         {
 373                         /* we can merge the notifications */
 374                         prev_par->h += h;
 375                         prev_par->y = y;
 376                         return NULL;
 377                         }
 378                 if (prev_par->y == y && prev_par->h == h &&
 379                     prev_par->x + prev_par->w == x)
 380                         {
 381                         /* we can merge the notifications */
 382                         prev_par->w += w;
 383                         return NULL;
 384                         }
 385                 if (prev_par->y == y && prev_par->h == h &&
 386                     x + w == prev_par->x)
 387                         {
 388                         /* we can merge the notifications */
 389                         prev_par->w += w;
 390                         prev_par->x = x;
 391                         return NULL;
 392                         }
 393                 }
 394
 395         ImageLoaderAreaParam *par = g_new0(ImageLoaderAreaParam, 1);
 396         par->il = il;
 397         par->x = x;
 398         par->y = y;
 399         par->w = w;
 400         par->h = h;
 401
 402         *list = g_list_prepend(*list, par);
 403         return par;
 404 }
 405
 406 /* this function expects that il->data_mutex is locked by caller */
 407 static void image_loader_emit_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 408 {
 409         ImageLoaderAreaParam *par = image_loader_queue_area_ready(il, &il->area_param_list, x, y, w, h);
 410
 411         if (par)
 412                 {
 413                 g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_area_ready_cb, par, NULL);
 414                 }
 415 }
 416
 417 /**************************************************************************************/
 418 /* the following functions may be executed in separate thread */
 419
 420 /* this function expects that il->data_mutex is locked by caller */
 421 static void image_loader_queue_delayed_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 422 {
 423         image_loader_queue_area_ready(il, &il->area_param_delayed_list, x, y, w, h);
 424 }
 425
 426
 427
 428 static gboolean image_loader_get_stopping(ImageLoader *il)
 429 {
 430         gboolean ret;
 431         if (!il) return FALSE;
 432
 433         g_mutex_lock(il->data_mutex);
 434         ret = il->stopping;
 435         g_mutex_unlock(il->data_mutex);
 436
 437         return ret;
 438 }
 439
 440
 441 static void image_loader_sync_pixbuf(ImageLoader *il)
 442 {
 443         GdkPixbuf *pb;
 444
 445         g_mutex_lock(il->data_mutex);
 446
 447         if (!il->loader)
 448                 {
 449                 g_mutex_unlock(il->data_mutex);
 450                 return;
 451                 }
 452
 453         pb = il->backend.get_pixbuf(il->loader);
 454
 455         if (pb == il->pixbuf)
 456                 {
 457                 g_mutex_unlock(il->data_mutex);
 458                 return;
 459                 }
 460
 461         if (g_ascii_strcasecmp(".jps", il->fd->extension) == 0)
 462                 {
 463                 g_object_set_data(G_OBJECT(pb), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 464                 }
 465
 466         if (il->pixbuf) g_object_unref(il->pixbuf);
 467
 468         il->pixbuf = pb;
 469         if (il->pixbuf) g_object_ref(il->pixbuf);
 470
 471         g_mutex_unlock(il->data_mutex);
 472 }
 473
 474 static void image_loader_area_updated_cb(gpointer UNUSED(loader),
 475                                  guint x, guint y, guint w, guint h,
 476                                  gpointer data)
 477 {
 478         ImageLoader *il = static_cast<ImageLoader *>(data);
 479
 480         if (!image_loader_get_pixbuf(il))
 481                 {
 482                 image_loader_sync_pixbuf(il);
 483                 if (!image_loader_get_pixbuf(il))
 484                         {
 485                         log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
 486                         }
 487                 }
 488
 489         g_mutex_lock(il->data_mutex);
 490         if (il->delay_area_ready)
 491                 image_loader_queue_delayed_area_ready(il, x, y, w, h);
 492         else
 493                 image_loader_emit_area_ready(il, x, y, w, h);
 494
 495         if (il->stopping) il->backend.abort(il->loader);
 496
 497         g_mutex_unlock(il->data_mutex);
 498 }
 499
 500 static void image_loader_area_prepared_cb(gpointer loader, gpointer data)
 501 {
 502         ImageLoader *il = static_cast<ImageLoader *>(data);
 503         GdkPixbuf *pb;
 504         guchar *pix;
 505         size_t h, rs;
 506
 507         /* a workaround for
 508            https://bugzilla.gnome.org/show_bug.cgi?id=547669
 509            https://bugzilla.gnome.org/show_bug.cgi?id=589334
 510         */
 511         gchar *format = il->backend.get_format_name(loader);
 512         if (strcmp(format, "svg") == 0 ||
 513             strcmp(format, "xpm") == 0)
 514                 {
 515                 g_free(format);
 516                 return;
 517                 }
 518
 519         g_free(format);
 520
 521         pb = il->backend.get_pixbuf(loader);
 522
 523         h = gdk_pixbuf_get_height(pb);
 524         rs = gdk_pixbuf_get_rowstride(pb);
 525         pix = gdk_pixbuf_get_pixels(pb);
 526
 527         memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
 528
 529 }
 530
 531 static void image_loader_size_cb(gpointer loader,
 532                                  gint width, gint height, gpointer data)
 533 {
 534         ImageLoader *il = static_cast<ImageLoader *>(data);
 535         gchar **mime_types;
 536         gboolean scale = FALSE;
 537         gint n;
 538
 539         g_mutex_lock(il->data_mutex);
 540         il->actual_width = width;
 541         il->actual_height = height;
 542         if (il->requested_width < 1 || il->requested_height < 1)
 543                 {
 544                 g_mutex_unlock(il->data_mutex);
 545                 image_loader_emit_size(il);
 546                 return;
 547                 }
 548         g_mutex_unlock(il->data_mutex);
 549
 550 #ifdef HAVE_FFMPEGTHUMBNAILER
 551         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 552                 scale = TRUE;
 553 #endif
 554         mime_types = il->backend.get_format_mime_types(loader);
 555         n = 0;
 556         while (mime_types[n] && !scale)
 557                 {
 558                 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
 559                 n++;
 560                 }
 561         g_strfreev(mime_types);
 562
 563         if (!scale)
 564                 {
 565                 image_loader_emit_size(il);
 566                 return;
 567                 }
 568
 569         g_mutex_lock(il->data_mutex);
 570
 571         gint nw, nh;
 572         if (width > il->requested_width || height > il->requested_height)
 573                 {
 574
 575                 if (((gdouble)il->requested_width / width) < ((gdouble)il->requested_height / height))
 576                         {
 577                         nw = il->requested_width;
 578                         nh = (gdouble)nw / width * height;
 579                         if (nh < 1) nh = 1;
 580                         }
 581                 else
 582                         {
 583                         nh = il->requested_height;
 584                         nw = (gdouble)nh / height * width;
 585                         if (nw < 1) nw = 1;
 586                         }
 587
 588                 il->actual_width = nw;
 589                 il->actual_height = nh;
 590                 il->backend.set_size(loader, nw, nh);
 591                 il->shrunk = TRUE;
 592                 }
 593
 594         g_mutex_unlock(il->data_mutex);
 595         image_loader_emit_size(il);
 596 }
 597
 598 static void image_loader_stop_loader(ImageLoader *il)
 599 {
 600         if (!il) return;
 601
 602         if (il->loader)
 603                 {
 604                 /* some loaders do not have a pixbuf till close, order is important here */
 605                 il->backend.close(il->loader, il->error ? NULL : &il->error); /* we are interested in the first error only */
 606                 image_loader_sync_pixbuf(il);
 607                 il->backend.free(il->loader);
 608                 il->loader = NULL;
 609                 }
 610         g_mutex_lock(il->data_mutex);
 611         il->done = TRUE;
 612         g_mutex_unlock(il->data_mutex);
 613 }
 614
 615 static void image_loader_setup_loader(ImageLoader *il)
 616 {
 617 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 618         gchar *format;
 619 #endif
 620
 621         gint external_preview = 1;
 622
 623         g_mutex_lock(il->data_mutex);
 624
 625         if (options->external_preview.enable)
 626                 {
 627                 gchar *cmd_line;
 628                 gchar *tilde_filename;
 629
 630                 tilde_filename = expand_tilde(options->external_preview.select);
 631
 632                 cmd_line = g_strdup_printf("\"%s\" \"%s\"" , tilde_filename, il->fd->path);
 633
 634                 external_preview = runcmd(cmd_line);
 635                 g_free(cmd_line);
 636                 g_free(tilde_filename);
 637                 }
 638
 639         if (external_preview == 0)
 640                 {
 641                 DEBUG_1("Using custom external loader");
 642                 image_loader_backend_set_external(&il->backend);
 643                 }
 644         else
 645
 646 #ifdef HAVE_FFMPEGTHUMBNAILER
 647         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 648                 {
 649                 DEBUG_1("Using custom ffmpegthumbnailer loader");
 650                 image_loader_backend_set_ft(&il->backend);
 651                 }
 652         else
 653 #endif
 654 #ifdef HAVE_PDF
 655         if (il->bytes_total >= 4 &&
 656             (memcmp(il->mapped_file + 0, "%PDF", 4) == 0))
 657                 {
 658                 DEBUG_1("Using custom pdf loader");
 659                 image_loader_backend_set_pdf(&il->backend);
 660                 }
 661         else
 662 #endif
 663 #ifdef HAVE_HEIF
 664         if (il->bytes_total >= 12 &&
 665                 ((memcmp(il->mapped_file + 4, "ftypheic", 8) == 0) ||
 666                 (memcmp(il->mapped_file + 4, "ftypmsf1", 8) == 0) ||
 667                 (memcmp(il->mapped_file + 4, "ftypmif1", 8) == 0) ||
 668                 (memcmp(il->mapped_file + 4, "ftypavif", 8) == 0)))
 669                 {
 670                 DEBUG_1("Using custom heif loader");
 671                 image_loader_backend_set_heif(&il->backend);
 672                 }
 673         else
 674 #endif
 675 #ifdef HAVE_DJVU
 676         if (il->bytes_total >= 16 &&
 677                 (memcmp(il->mapped_file, "AT&TFORM", 8) == 0) &&
 678                 (memcmp(il->mapped_file + 12, "DJV", 3) == 0))
 679                 {
 680                 DEBUG_1("Using custom djvu loader");
 681                 image_loader_backend_set_djvu(&il->backend);
 682                 }
 683         else
 684 #endif
 685 #ifdef HAVE_JPEG
 686         if (il->bytes_total >= 2 && il->mapped_file[0] == 0xff && il->mapped_file[1] == 0xd8)
 687                 {
 688                 DEBUG_1("Using custom jpeg loader");
 689                 image_loader_backend_set_jpeg(&il->backend);
 690                 }
 691 #ifndef HAVE_RAW
 692         else
 693         if (il->bytes_total >= 11 &&
 694                 (memcmp(il->mapped_file + 4, "ftypcrx", 7) == 0) &&
 695                 (memcmp(il->mapped_file + 64, "CanonCR3", 8) == 0))
 696                 {
 697                 DEBUG_1("Using custom cr3 loader");
 698                 image_loader_backend_set_cr3(&il->backend);
 699                 }
 700 #endif
 701         else
 702 #endif
 703 #ifdef HAVE_TIFF
 704         if (il->bytes_total >= 10 &&
 705             (memcmp(il->mapped_file, "MM\0*", 4) == 0 ||
 706              memcmp(il->mapped_file, "MM\0+\0\x08\0\0", 8) == 0 ||
 707              memcmp(il->mapped_file, "II+\0\x08\0\0\0", 8) == 0 ||
 708              memcmp(il->mapped_file, "II*\0", 4) == 0))
 709                 {
 710                 DEBUG_1("Using custom tiff loader");
 711                 image_loader_backend_set_tiff(&il->backend);
 712                 }
 713         else
 714 #endif
 715         if (il->bytes_total >= 3 && il->mapped_file[0] == 0x44 && il->mapped_file[1] == 0x44 && il->mapped_file[2] == 0x53)
 716                 {
 717                 DEBUG_1("Using dds loader");
 718                 image_loader_backend_set_dds(&il->backend);
 719                 }
 720         else
 721         if (il->bytes_total >= 6 &&
 722                 (memcmp(il->mapped_file, "8BPS\0\x01", 6) == 0))
 723                 {
 724                 DEBUG_1("Using custom psd loader");
 725                 image_loader_backend_set_psd(&il->backend);
 726                 }
 727         else
 728 #ifdef HAVE_J2K
 729         if (il->bytes_total >= 12 &&
 730                 (memcmp(il->mapped_file, "\0\0\0\x0CjP\x20\x20\x0D\x0A\x87\x0A", 12) == 0))
 731                 {
 732                 DEBUG_1("Using custom j2k loader");
 733                 image_loader_backend_set_j2k(&il->backend);
 734                 }
 735         else
 736 #endif
 737 #ifdef HAVE_JPEGXL
 738         if (il->bytes_total >= 12 &&
 739                 (memcmp(il->mapped_file, "\0\0\0\x0C\x4A\x58\x4C\x20\x0D\x0A\x87\x0A", 12) == 0))
 740                 {
 741                 DEBUG_1("Using custom jpeg xl loader");
 742                 image_loader_backend_set_jpegxl(&il->backend);
 743                 }
 744         else
 745         if (il->bytes_total >= 2 &&
 746                 (memcmp(il->mapped_file, "\xFF\x0A", 2) == 0))
 747                 {
 748                 DEBUG_1("Using custom jpeg xl loader");
 749                 image_loader_backend_set_jpegxl(&il->backend);
 750                 }
 751         else
 752 #endif
 753         if ((il->bytes_total == 6144 || il->bytes_total == 6912) &&
 754                 (file_extension_match(il->fd->path, ".scr")))
 755                 {
 756                 DEBUG_1("Using custom zxscr loader");
 757                 image_loader_backend_set_zxscr(&il->backend);
 758                 }
 759         else
 760         if (il->fd->format_class == FORMAT_CLASS_COLLECTION)
 761                 {
 762                 DEBUG_1("Using custom collection loader");
 763                 image_loader_backend_set_collection(&il->backend);
 764                 }
 765         else
 766         if (g_strcmp0(strrchr(il->fd->path, '.'), ".svgz") == 0)
 767                 {
 768                 DEBUG_1("Using custom svgz loader");
 769                 image_loader_backend_set_svgz(&il->backend);
 770                 }
 771         else
 772                 image_loader_backend_set_default(&il->backend);
 773
 774         il->loader = static_cast<void **>(il->backend.loader_new(image_loader_area_updated_cb, image_loader_size_cb, image_loader_area_prepared_cb, il));
 775
 776 #ifdef HAVE_TIFF
 777         format = il->backend.get_format_name(il->loader);
 778         if (g_strcmp0(format, "tiff") == 0)
 779                 {
 780                 il->backend.set_page_num(il->loader, il->fd->page_num);
 781                 }
 782         g_free(format);
 783 #endif
 784
 785 #ifdef HAVE_PDF
 786         format = il->backend.get_format_name(il->loader);
 787         if (g_strcmp0(format, "pdf") == 0)
 788                 {
 789                 il->backend.set_page_num(il->loader, il->fd->page_num);
 790                 }
 791         g_free(format);
 792 #endif
 793
 794 #ifdef HAVE_HEIF
 795         format = il->backend.get_format_name(il->loader);
 796         if (g_strcmp0(format, "heif") == 0)
 797                 {
 798                 il->backend.set_page_num(il->loader, il->fd->page_num);
 799                 }
 800         g_free(format);
 801 #endif
 802
 803 #ifdef HAVE_DJVU
 804         format = il->backend.get_format_name(il->loader);
 805         if (g_strcmp0(format, "djvu") == 0)
 806                 {
 807                 il->backend.set_page_num(il->loader, il->fd->page_num);
 808                 }
 809         g_free(format);
 810 #endif
 811
 812         il->fd->format_name = il->backend.get_format_name(il->loader);
 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 b;
 837         gint c;
 838
 839         if (!il) return FALSE;
 840
 841         c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
 842         while (c > 0 && !image_loader_get_stopping(il))
 843                 {
 844                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 845
 846                 if (b == 0)
 847                         {
 848                         image_loader_done(il);
 849                         return FALSE;
 850                         }
 851
 852                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 853                         {
 854                         image_loader_error(il);
 855                         return FALSE;
 856                         }
 857
 858                 il->bytes_read += b;
 859
 860                 c--;
 861                 }
 862
 863         if (il->bytes_total > 0)
 864                 {
 865                 image_loader_emit_percent(il);
 866                 }
 867
 868         return TRUE;
 869 }
 870
 871 static gboolean image_loader_begin(ImageLoader *il)
 872 {
 873 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 874         gchar *format;
 875 #endif
 876         gssize b;
 877
 878         if (il->pixbuf) return FALSE;
 879
 880         b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 881         if (b < 1) return FALSE;
 882
 883         image_loader_setup_loader(il);
 884
 885         g_assert(il->bytes_read == 0);
 886         if (il->backend.load) {
 887                 b = il->bytes_total;
 888                 if (!il->backend.load(il->loader, il->mapped_file, b, &il->error))
 889                         {
 890                         image_loader_stop_loader(il);
 891                         return FALSE;
 892                         }
 893         }
 894         else if (!il->backend.write(il->loader, il->mapped_file, b, &il->error))
 895                 {
 896                 image_loader_stop_loader(il);
 897                 return FALSE;
 898                 }
 899
 900 #ifdef HAVE_PDF
 901         format = il->backend.get_format_name(il->loader);
 902         if (g_strcmp0(format, "pdf") == 0)
 903                 {
 904                 gint i = il->backend.get_page_total(il->loader);
 905                 file_data_set_page_total(il->fd, i);
 906                 }
 907         g_free(format);
 908 #endif
 909 #ifdef HAVE_HEIF
 910         format = il->backend.get_format_name(il->loader);
 911         if (g_strcmp0(format, "heif") == 0)
 912                 {
 913                 gint i = il->backend.get_page_total(il->loader);
 914                 file_data_set_page_total(il->fd, i);
 915                 }
 916         g_free(format);
 917 #endif
 918 #ifdef HAVE_DJVU
 919         format = il->backend.get_format_name(il->loader);
 920         if (g_strcmp0(format, "djvu") == 0)
 921                 {
 922                 gint i = il->backend.get_page_total(il->loader);
 923                 file_data_set_page_total(il->fd, i);
 924                 }
 925         g_free(format);
 926 #endif
 927 #ifdef HAVE_TIFF
 928         format = il->backend.get_format_name(il->loader);
 929         if (g_strcmp0(format, "tiff") == 0)
 930                 {
 931                 gint i = il->backend.get_page_total(il->loader);
 932                 file_data_set_page_total(il->fd, i);
 933                 }
 934         g_free(format);
 935 #endif
 936
 937         il->bytes_read += b;
 938
 939         /* read until size is known */
 940         while (il->loader && !il->backend.get_pixbuf(il->loader) && b > 0 && !image_loader_get_stopping(il))
 941                 {
 942                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 943                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 944                         {
 945                         image_loader_stop_loader(il);
 946                         return FALSE;
 947                         }
 948                 il->bytes_read += b;
 949                 }
 950         if (!il->pixbuf) image_loader_sync_pixbuf(il);
 951
 952         if (il->bytes_read == il->bytes_total || b < 1)
 953                 {
 954                 /* done, handle (broken) loaders that do not have pixbuf till close */
 955                 image_loader_stop_loader(il);
 956
 957                 if (!il->pixbuf) return FALSE;
 958
 959                 image_loader_done(il);
 960                 return TRUE;
 961                 }
 962
 963         if (!il->pixbuf)
 964                 {
 965                 image_loader_stop_loader(il);
 966                 return FALSE;
 967                 }
 968
 969         return TRUE;
 970 }
 971
 972 /**************************************************************************************/
 973 /* the following functions are always executed in the main thread */
 974
 975
 976 static gboolean image_loader_setup_source(ImageLoader *il)
 977 {
 978         struct stat st;
 979         gchar *pathl;
 980
 981         if (!il || il->loader || il->mapped_file) return FALSE;
 982
 983         il->mapped_file = NULL;
 984
 985         if (il->fd)
 986                 {
 987                 ExifData *exif = exif_read_fd(il->fd);
 988
 989                 if (options->thumbnails.use_exif)
 990                         {
 991                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, il->requested_width, il->requested_height);
 992
 993                         if (il->mapped_file)
 994                                 {
 995                                 il->preview = IMAGE_LOADER_PREVIEW_EXIF;
 996                                 }
 997                         }
 998                 else
 999                         {
1000                         il->mapped_file = libraw_get_preview(il, (guint *)&il->bytes_total);
1001
1002                         if (il->mapped_file)
1003                                 {
1004                                 /* Both exiv2 and libraw sometimes return a pointer to a file
1005                                  * section that is not a jpeg */
1006                                 if (!(il->mapped_file[0] == 0xFF && il->mapped_file[1] == 0xD8))
1007                                         {
1008                                         il->mapped_file = NULL;
1009                                         }
1010                                 else
1011                                         {
1012                                         il->preview = IMAGE_LOADER_PREVIEW_LIBRAW;
1013                                         }
1014                                 }
1015                         }
1016
1017                 /* If libraw does not find a thumbnail, try exiv2 */
1018                 if (!il->mapped_file)
1019                         {
1020                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, 0, 0); /* get the largest available preview image or NULL for normal images*/
1021
1022                         if (il->mapped_file)
1023                                 {
1024                                 /* Both exiv2 and libraw sometimes return a pointer to a file
1025                                  * section that is not a jpeg */
1026                                 if (!(il->mapped_file[0] == 0xFF && il->mapped_file[1] == 0xD8))
1027                                         {
1028                                         il->mapped_file = NULL;
1029                                         }
1030                                 else
1031                                         {
1032                                         il->preview = IMAGE_LOADER_PREVIEW_EXIF;
1033                                         }
1034                                 }
1035                         }
1036
1037                 if (il->mapped_file)
1038                         {
1039                         DEBUG_1("Usable reduced size (preview) image loaded from file %s", il->fd->path);
1040                         }
1041                 exif_free_fd(il->fd, exif);
1042                 }
1043
1044
1045         if (!il->mapped_file)
1046                 {
1047                 /* normal file */
1048                 gint load_fd;
1049
1050                 pathl = path_from_utf8(il->fd->path);
1051                 load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
1052                 g_free(pathl);
1053                 if (load_fd == -1) return FALSE;
1054
1055                 if (fstat(load_fd, &st) == 0)
1056                         {
1057                         il->bytes_total = st.st_size;
1058                         }
1059                 else
1060                         {
1061                         close(load_fd);
1062                         return FALSE;
1063                         }
1064
1065                 il->mapped_file = static_cast<guchar *>(mmap(0, il->bytes_total, PROT_READ|PROT_WRITE, MAP_PRIVATE, load_fd, 0));
1066                 close(load_fd);
1067                 if (il->mapped_file == MAP_FAILED)
1068                         {
1069                         il->mapped_file = 0;
1070                         return FALSE;
1071                         }
1072                 il->preview = IMAGE_LOADER_PREVIEW_NONE;
1073                 }
1074
1075         return TRUE;
1076 }
1077
1078 static void image_loader_stop_source(ImageLoader *il)
1079 {
1080         if (!il) return;
1081
1082         if (il->mapped_file)
1083                 {
1084                 if (il->preview == IMAGE_LOADER_PREVIEW_EXIF)
1085                         {
1086                         exif_free_preview(il->mapped_file);
1087                         }
1088                 else if (il->preview == IMAGE_LOADER_PREVIEW_LIBRAW)
1089                         {
1090                         libraw_free_preview(il->mapped_file);
1091                         }
1092                 else
1093                         {
1094                         munmap(il->mapped_file, il->bytes_total);
1095                         }
1096                 il->mapped_file = NULL;
1097                 }
1098 }
1099
1100 static void image_loader_stop(ImageLoader *il)
1101 {
1102         if (!il) return;
1103
1104         if (il->idle_id)
1105                 {
1106                 g_source_remove(il->idle_id);
1107                 il->idle_id = 0;
1108                 }
1109
1110         if (il->thread)
1111                 {
1112                 /* stop loader in the other thread */
1113                 g_mutex_lock(il->data_mutex);
1114                 il->stopping = TRUE;
1115                 while (!il->can_destroy) g_cond_wait(il->can_destroy_cond, il->data_mutex);
1116                 g_mutex_unlock(il->data_mutex);
1117                 }
1118
1119         image_loader_stop_loader(il);
1120         image_loader_stop_source(il);
1121
1122 }
1123
1124 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable)
1125 {
1126         g_mutex_lock(il->data_mutex);
1127         il->delay_area_ready = enable;
1128         if (!enable)
1129                 {
1130                 /* send delayed */
1131                 GList *list, *work;
1132                 list = g_list_reverse(il->area_param_delayed_list);
1133                 il->area_param_delayed_list = NULL;
1134                 g_mutex_unlock(il->data_mutex);
1135
1136                 work = list;
1137
1138                 while (work)
1139                         {
1140                         ImageLoaderAreaParam *par = static_cast<ImageLoaderAreaParam *>(work->data);
1141                         work = work->next;
1142
1143                         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, par->x, par->y, par->w, par->h);
1144                         g_free(par);
1145                         }
1146                 g_list_free(list);
1147                 }
1148         else
1149                 {
1150                 /* just unlock */
1151                 g_mutex_unlock(il->data_mutex);
1152                 }
1153 }
1154
1155
1156 /**************************************************************************************/
1157 /* execution via idle calls */
1158
1159 //static gboolean image_loader_idle_cb(gpointer data)
1160 //{
1161         //gboolean ret = FALSE;
1162         //ImageLoader *il = static_cast<ImageLoader *>(data);
1163
1164         //if (il->idle_id)
1165                 //{
1166                 //ret = image_loader_continue(il);
1167                 //}
1168
1169         //if (!ret)
1170                 //{
1171                 //image_loader_stop_source(il);
1172                 //}
1173
1174         //return ret;
1175 //}
1176
1177
1178 //static gboolean image_loader_start_idle(ImageLoader *il)
1179 //{
1180         //gboolean ret;
1181
1182         //if (!il) return FALSE;
1183
1184         //if (!il->fd) return FALSE;
1185
1186         //if (!image_loader_setup_source(il)) return FALSE;
1187
1188         //ret = image_loader_begin(il);
1189
1190         //if (ret && !il->done) il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, NULL);
1191         //return ret;
1192 //}
1193
1194 /**************************************************************************************/
1195 /* execution via thread */
1196
1197 static GThreadPool *image_loader_thread_pool = NULL;
1198
1199 static GCond *image_loader_prio_cond = NULL;
1200 static GMutex *image_loader_prio_mutex = NULL;
1201 static gint image_loader_prio_num = 0;
1202
1203
1204 static void image_loader_thread_enter_high(void)
1205 {
1206         g_mutex_lock(image_loader_prio_mutex);
1207         image_loader_prio_num++;
1208         g_mutex_unlock(image_loader_prio_mutex);
1209 }
1210
1211 static void image_loader_thread_leave_high(void)
1212 {
1213         g_mutex_lock(image_loader_prio_mutex);
1214         image_loader_prio_num--;
1215         if (image_loader_prio_num == 0) g_cond_broadcast(image_loader_prio_cond); /* wake up all low prio threads */
1216         g_mutex_unlock(image_loader_prio_mutex);
1217 }
1218
1219 static void image_loader_thread_wait_high(void)
1220 {
1221         g_mutex_lock(image_loader_prio_mutex);
1222         while (image_loader_prio_num)
1223                 {
1224                 g_cond_wait(image_loader_prio_cond, image_loader_prio_mutex);
1225                 }
1226
1227         g_mutex_unlock(image_loader_prio_mutex);
1228 }
1229
1230
1231 static void image_loader_thread_run(gpointer data, gpointer UNUSED(user_data))
1232 {
1233         ImageLoader *il = static_cast<ImageLoader *>(data);
1234         gboolean cont;
1235         gboolean err;
1236
1237         if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1238                 {
1239                 /* low prio, wait until high prio tasks finishes */
1240                 image_loader_thread_wait_high();
1241                 }
1242         else
1243                 {
1244                 /* high prio */
1245                 image_loader_thread_enter_high();
1246                 }
1247
1248         err = !image_loader_begin(il);
1249
1250         if (err)
1251                 {
1252                 /*
1253                 loader failed, we have to send signal
1254                 (idle mode returns the image_loader_begin return value directly)
1255                 (success is always reported indirectly from image_loader_begin)
1256                 */
1257                 image_loader_emit_error(il);
1258                 }
1259
1260         cont = !err;
1261
1262         while (cont && !image_loader_get_is_done(il) && !image_loader_get_stopping(il))
1263                 {
1264                 if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1265                         {
1266                         /* low prio, wait until high prio tasks finishes */
1267                         image_loader_thread_wait_high();
1268                         }
1269                 cont = image_loader_continue(il);
1270                 }
1271         image_loader_stop_loader(il);
1272
1273         if (il->idle_priority <= G_PRIORITY_DEFAULT_IDLE)
1274                 {
1275                 /* high prio */
1276                 image_loader_thread_leave_high();
1277                 }
1278
1279         g_mutex_lock(il->data_mutex);
1280         il->can_destroy = TRUE;
1281         g_cond_signal(il->can_destroy_cond);
1282         g_mutex_unlock(il->data_mutex);
1283
1284 }
1285
1286
1287 static gboolean image_loader_start_thread(ImageLoader *il)
1288 {
1289         if (!il) return FALSE;
1290
1291         if (!il->fd) return FALSE;
1292
1293         il->thread = TRUE;
1294
1295         if (!image_loader_setup_source(il)) return FALSE;
1296
1297         if (!image_loader_thread_pool)
1298                 {
1299                 image_loader_thread_pool = g_thread_pool_new(image_loader_thread_run, NULL, -1, FALSE, NULL);
1300                 if (!image_loader_prio_cond) image_loader_prio_cond = g_new(GCond, 1);
1301                 g_cond_init(image_loader_prio_cond);
1302                 if (!image_loader_prio_mutex) image_loader_prio_mutex = g_new(GMutex, 1);
1303                 g_mutex_init(image_loader_prio_mutex);
1304                 }
1305
1306         il->can_destroy = FALSE; /* ImageLoader can't be freed until image_loader_thread_run finishes */
1307
1308         g_thread_pool_push(image_loader_thread_pool, il, NULL);
1309         DEBUG_1("Thread pool num threads: %d", g_thread_pool_get_num_threads(image_loader_thread_pool));
1310
1311         return TRUE;
1312 }
1313
1314
1315 /**************************************************************************************/
1316 /* public interface */
1317
1318
1319 gboolean image_loader_start(ImageLoader *il)
1320 {
1321         if (!il) return FALSE;
1322
1323         if (!il->fd) return FALSE;
1324
1325         return image_loader_start_thread(il);
1326 }
1327
1328
1329 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
1330 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
1331 {
1332         GdkPixbuf *ret;
1333         if (!il) return NULL;
1334
1335         g_mutex_lock(il->data_mutex);
1336         ret = il->pixbuf;
1337         g_mutex_unlock(il->data_mutex);
1338         return ret;
1339 }
1340
1341 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
1342 {
1343         if (!il) return;
1344
1345         g_mutex_lock(il->data_mutex);
1346         il->requested_width = width;
1347         il->requested_height = height;
1348         g_mutex_unlock(il->data_mutex);
1349 }
1350
1351 void image_loader_set_buffer_size(ImageLoader *il, guint count)
1352 {
1353         if (!il) return;
1354
1355         g_mutex_lock(il->data_mutex);
1356         il->idle_read_loop_count = count ? count : 1;
1357         g_mutex_unlock(il->data_mutex);
1358 }
1359
1360 void image_loader_set_priority(ImageLoader *il, gint priority)
1361 {
1362         if (!il) return;
1363
1364         if (il->thread) return; /* can't change prio if the thread already runs */
1365         il->idle_priority = priority;
1366 }
1367
1368
1369 gdouble image_loader_get_percent(ImageLoader *il)
1370 {
1371         gdouble ret;
1372         if (!il) return 0.0;
1373
1374         g_mutex_lock(il->data_mutex);
1375         if (il->bytes_total == 0)
1376                 {
1377                 ret = 0.0;
1378                 }
1379         else
1380                 {
1381                 ret = (gdouble)il->bytes_read / il->bytes_total;
1382                 }
1383         g_mutex_unlock(il->data_mutex);
1384         return ret;
1385 }
1386
1387 gboolean image_loader_get_is_done(ImageLoader *il)
1388 {
1389         gboolean ret;
1390         if (!il) return FALSE;
1391
1392         g_mutex_lock(il->data_mutex);
1393         ret = il->done;
1394         g_mutex_unlock(il->data_mutex);
1395
1396         return ret;
1397 }
1398
1399 FileData *image_loader_get_fd(ImageLoader *il)
1400 {
1401         FileData *ret;
1402         if (!il) return NULL;
1403
1404         g_mutex_lock(il->data_mutex);
1405         ret = il->fd;
1406         g_mutex_unlock(il->data_mutex);
1407
1408         return ret;
1409 }
1410
1411 gboolean image_loader_get_shrunk(ImageLoader *il)
1412 {
1413         gboolean ret;
1414         if (!il) return FALSE;
1415
1416         g_mutex_lock(il->data_mutex);
1417         ret = il->shrunk;
1418         g_mutex_unlock(il->data_mutex);
1419         return ret;
1420 }
1421
1422 const gchar *image_loader_get_error(ImageLoader *il)
1423 {
1424         const gchar *ret = NULL;
1425         if (!il) return NULL;
1426         g_mutex_lock(il->data_mutex);
1427         if (il->error) ret = il->error->message;
1428         g_mutex_unlock(il->data_mutex);
1429         return ret;
1430 }
1431
1432
1433 /**
1434  *  @FIXME this can be rather slow and blocks until the size is known
1435  */
1436 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height)
1437 {
1438         ImageLoader *il;
1439         gboolean success;
1440
1441         il = image_loader_new(fd);
1442
1443         success = image_loader_start_idle(il);
1444
1445         if (success && il->pixbuf)
1446                 {
1447                 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
1448                 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
1449                 }
1450         else
1451                 {
1452                 if (width) *width = -1;
1453                 if (height) *height = -1;
1454                 }
1455
1456         image_loader_free(il);
1457
1458         return success;
1459 }
1460 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */