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_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_webp.h"
  37 #include "image_load_zxscr.h"
  38 #include "image_load_j2k.h"
  39 #include "image_load_jpegxl.h"
  40 #include "image_load_libraw.h"
  41 #include "image_load_svgz.h"
  42 #include "misc.h"
  43
  44 #include "exif.h"
  45 #include "filedata.h"
  46 #include "ui_fileops.h"
  47 #include "gq-marshal.h"
  48
  49 #include <fcntl.h>
  50 #include <sys/mman.h>
  51
  52 #define IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT   4096
  53 #define IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT       1
  54
  55 /* image loader class */
  56
  57
  58 enum {
  59         SIGNAL_AREA_READY = 0,
  60         SIGNAL_ERROR,
  61         SIGNAL_DONE,
  62         SIGNAL_PERCENT,
  63         SIGNAL_SIZE,
  64         SIGNAL_COUNT
  65 };
  66
  67 static guint signals[SIGNAL_COUNT] = { 0 };
  68
  69 static void image_loader_init(GTypeInstance *instance, gpointer g_class);
  70 static void image_loader_class_init_wrapper(void *data, void *user_data);
  71 static void image_loader_class_init(ImageLoaderClass *class);
  72 static void image_loader_finalize(GObject *object);
  73 static void image_loader_stop(ImageLoader *il);
  74
  75 GType image_loader_get_type(void)
  76 {
  77         static GType type = 0;
  78         if (type == 0)
  79                 {
  80                 static const GTypeInfo info = {
  81                         sizeof(ImageLoaderClass),
  82                         NULL,   /* base_init */
  83                         NULL,   /* base_finalize */
  84                         (GClassInitFunc)image_loader_class_init_wrapper, /* class_init */
  85                         NULL,   /* class_finalize */
  86                         NULL,   /* class_data */
  87                         sizeof(ImageLoader),
  88                         0,      /* n_preallocs */
  89                         (GInstanceInitFunc)image_loader_init, /* instance_init */
  90                         NULL    /* value_table */
  91                         };
  92                 type = g_type_register_static(G_TYPE_OBJECT, "ImageLoaderType", &info, 0);
  93                 }
  94         return type;
  95 }
  96
  97 static void image_loader_init(GTypeInstance *instance, gpointer UNUSED(g_class))
  98 {
  99         ImageLoader *il = (ImageLoader *)instance;
 100
 101         il->pixbuf = NULL;
 102         il->idle_id = 0;
 103         il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
 104         il->done = FALSE;
 105         il->loader = NULL;
 106
 107         il->bytes_read = 0;
 108         il->bytes_total = 0;
 109
 110         il->idle_done_id = 0;
 111
 112         il->idle_read_loop_count = IMAGE_LOADER_IDLE_READ_LOOP_COUNT_DEFAULT;
 113         il->read_buffer_size = IMAGE_LOADER_READ_BUFFER_SIZE_DEFAULT;
 114         il->mapped_file = NULL;
 115         il->preview = IMAGE_LOADER_PREVIEW_NONE;
 116
 117         il->requested_width = 0;
 118         il->requested_height = 0;
 119         il->actual_width = 0;
 120         il->actual_height = 0;
 121         il->shrunk = FALSE;
 122
 123         il->can_destroy = TRUE;
 124
 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
 130         DEBUG_1("new image loader %p, bufsize=%" G_GSIZE_FORMAT " idle_loop=%u", (void *)il, il->read_buffer_size, il->idle_read_loop_count);
 131 }
 132
 133 static void image_loader_class_init_wrapper(void *data, void *UNUSED(user_data))
 134 {
 135         image_loader_class_init(data);
 136 }
 137
 138 static void image_loader_class_init(ImageLoaderClass *class)
 139 {
 140         GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 141
 142 //      gobject_class->set_property = image_loader_set_property;
 143 //      gobject_class->get_property = image_loader_get_property;
 144
 145         gobject_class->finalize = image_loader_finalize;
 146
 147
 148         signals[SIGNAL_AREA_READY] =
 149                 g_signal_new("area_ready",
 150                              G_OBJECT_CLASS_TYPE(gobject_class),
 151                              G_SIGNAL_RUN_LAST,
 152                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 153                              NULL, NULL,
 154                              gq_marshal_VOID__INT_INT_INT_INT,
 155                              G_TYPE_NONE, 4,
 156                              G_TYPE_INT,
 157                              G_TYPE_INT,
 158                              G_TYPE_INT,
 159                              G_TYPE_INT);
 160
 161         signals[SIGNAL_ERROR] =
 162                 g_signal_new("error",
 163                              G_OBJECT_CLASS_TYPE(gobject_class),
 164                              G_SIGNAL_RUN_LAST,
 165                              G_STRUCT_OFFSET(ImageLoaderClass, error),
 166                              NULL, NULL,
 167                              g_cclosure_marshal_VOID__VOID,
 168                              G_TYPE_NONE, 0);
 169
 170         signals[SIGNAL_DONE] =
 171                 g_signal_new("done",
 172                              G_OBJECT_CLASS_TYPE(gobject_class),
 173                              G_SIGNAL_RUN_LAST,
 174                              G_STRUCT_OFFSET(ImageLoaderClass, done),
 175                              NULL, NULL,
 176                              g_cclosure_marshal_VOID__VOID,
 177                              G_TYPE_NONE, 0);
 178
 179         signals[SIGNAL_PERCENT] =
 180                 g_signal_new("percent",
 181                              G_OBJECT_CLASS_TYPE(gobject_class),
 182                              G_SIGNAL_RUN_LAST,
 183                              G_STRUCT_OFFSET(ImageLoaderClass, percent),
 184                              NULL, NULL,
 185                              g_cclosure_marshal_VOID__DOUBLE,
 186                              G_TYPE_NONE, 1,
 187                              G_TYPE_DOUBLE);
 188
 189         signals[SIGNAL_SIZE] =
 190                 g_signal_new("size_prepared",
 191                              G_OBJECT_CLASS_TYPE(gobject_class),
 192                              G_SIGNAL_RUN_LAST,
 193                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 194                              NULL, NULL,
 195                              gq_marshal_VOID__INT_INT,
 196                              G_TYPE_NONE, 2,
 197                              G_TYPE_INT,
 198                              G_TYPE_INT);
 199
 200 }
 201
 202 static void image_loader_finalize(GObject *object)
 203 {
 204         ImageLoader *il = (ImageLoader *)object;
 205
 206         image_loader_stop(il);
 207
 208         if (il->error) DEBUG_1("%s", image_loader_get_error(il));
 209
 210         DEBUG_1("freeing image loader %p bytes_read=%" G_GSIZE_FORMAT, (void *)il, il->bytes_read);
 211
 212         if (il->idle_done_id)
 213                 {
 214                 g_source_remove(il->idle_done_id);
 215                 il->idle_done_id = 0;
 216                 }
 217
 218         while (g_source_remove_by_user_data(il))
 219                 {
 220                 DEBUG_2("pending signals detected");
 221                 }
 222
 223         while (il->area_param_list)
 224                 {
 225                 DEBUG_1("pending area_ready signals detected");
 226                 while (g_source_remove_by_user_data(il->area_param_list->data)) {}
 227                 g_free(il->area_param_list->data);
 228                 il->area_param_list = g_list_delete_link(il->area_param_list, il->area_param_list);
 229                 }
 230
 231         while (il->area_param_delayed_list)
 232                 {
 233                 g_free(il->area_param_delayed_list->data);
 234                 il->area_param_delayed_list = g_list_delete_link(il->area_param_delayed_list, il->area_param_delayed_list);
 235                 }
 236
 237         if (il->pixbuf) g_object_unref(il->pixbuf);
 238
 239         if (il->error) g_error_free(il->error);
 240
 241         file_data_unref(il->fd);
 242
 243         g_mutex_clear(il->data_mutex);
 244         g_free(il->data_mutex);
 245         g_cond_clear(il->can_destroy_cond);
 246         g_free(il->can_destroy_cond);
 247 }
 248
 249 void image_loader_free(ImageLoader *il)
 250 {
 251         if (!il) return;
 252         g_object_unref(G_OBJECT(il));
 253 }
 254
 255
 256 ImageLoader *image_loader_new(FileData *fd)
 257 {
 258         ImageLoader *il;
 259
 260         if (!fd) return NULL;
 261
 262         il = (ImageLoader *) g_object_new(TYPE_IMAGE_LOADER, NULL);
 263
 264         il->fd = file_data_ref(fd);
 265
 266         return il;
 267 }
 268
 269 /**************************************************************************************/
 270 /* send signals via idle calbacks - the callback are executed in the main thread */
 271
 272 typedef struct _ImageLoaderAreaParam ImageLoaderAreaParam;
 273 struct _ImageLoaderAreaParam {
 274         ImageLoader *il;
 275         guint x;
 276         guint y;
 277         guint w;
 278         guint h;
 279 };
 280
 281
 282 static gboolean image_loader_emit_area_ready_cb(gpointer data)
 283 {
 284         ImageLoaderAreaParam *par = data;
 285         ImageLoader *il = par->il;
 286         guint x, y, w, h;
 287         g_mutex_lock(il->data_mutex);
 288         il->area_param_list = g_list_remove(il->area_param_list, par);
 289         x = par->x;
 290         y = par->y;
 291         w = par->w;
 292         h = par->h;
 293         g_free(par);
 294         g_mutex_unlock(il->data_mutex);
 295
 296         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, x, y, w, h);
 297
 298         return FALSE;
 299 }
 300
 301 static gboolean image_loader_emit_done_cb(gpointer data)
 302 {
 303         ImageLoader *il = data;
 304         g_signal_emit(il, signals[SIGNAL_DONE], 0);
 305         return FALSE;
 306 }
 307
 308 static gboolean image_loader_emit_error_cb(gpointer data)
 309 {
 310         ImageLoader *il = data;
 311         g_signal_emit(il, signals[SIGNAL_ERROR], 0);
 312         return FALSE;
 313 }
 314
 315 static gboolean image_loader_emit_percent_cb(gpointer data)
 316 {
 317         ImageLoader *il = data;
 318         g_signal_emit(il, signals[SIGNAL_PERCENT], 0, image_loader_get_percent(il));
 319         return FALSE;
 320 }
 321
 322 static gboolean image_loader_emit_size_cb(gpointer data)
 323 {
 324         gint width, height;
 325         ImageLoader *il = data;
 326         g_mutex_lock(il->data_mutex);
 327         width = il->actual_width;
 328         height = il->actual_height;
 329         g_mutex_unlock(il->data_mutex);
 330         g_signal_emit(il, signals[SIGNAL_SIZE], 0, width, height);
 331         return FALSE;
 332 }
 333
 334
 335 /* DONE and ERROR are emitted only once, thus they can have normal priority
 336    PERCENT and AREA_READY should be processed ASAP
 337 */
 338
 339 static void image_loader_emit_done(ImageLoader *il)
 340 {
 341         g_idle_add_full(il->idle_priority, image_loader_emit_done_cb, il, NULL);
 342 }
 343
 344 static void image_loader_emit_error(ImageLoader *il)
 345 {
 346         g_idle_add_full(il->idle_priority, image_loader_emit_error_cb, il, NULL);
 347 }
 348
 349 static void image_loader_emit_percent(ImageLoader *il)
 350 {
 351         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_percent_cb, il, NULL);
 352 }
 353
 354 static void image_loader_emit_size(ImageLoader *il)
 355 {
 356         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_size_cb, il, NULL);
 357 }
 358
 359 static ImageLoaderAreaParam *image_loader_queue_area_ready(ImageLoader *il, GList **list, guint x, guint y, guint w, guint h)
 360 {
 361         if (*list)
 362                 {
 363                 ImageLoaderAreaParam *prev_par = (*list)->data;
 364                 if (prev_par->x == x && prev_par->w == w &&
 365                     prev_par->y + prev_par->h == y)
 366                         {
 367                         /* we can merge the notifications */
 368                         prev_par->h += h;
 369                         return NULL;
 370                         }
 371                 if (prev_par->x == x && prev_par->w == w &&
 372                     y + h == prev_par->y)
 373                         {
 374                         /* we can merge the notifications */
 375                         prev_par->h += h;
 376                         prev_par->y = y;
 377                         return NULL;
 378                         }
 379                 if (prev_par->y == y && prev_par->h == h &&
 380                     prev_par->x + prev_par->w == x)
 381                         {
 382                         /* we can merge the notifications */
 383                         prev_par->w += w;
 384                         return NULL;
 385                         }
 386                 if (prev_par->y == y && prev_par->h == h &&
 387                     x + w == prev_par->x)
 388                         {
 389                         /* we can merge the notifications */
 390                         prev_par->w += w;
 391                         prev_par->x = x;
 392                         return NULL;
 393                         }
 394                 }
 395
 396         ImageLoaderAreaParam *par = g_new0(ImageLoaderAreaParam, 1);
 397         par->il = il;
 398         par->x = x;
 399         par->y = y;
 400         par->w = w;
 401         par->h = h;
 402
 403         *list = g_list_prepend(*list, par);
 404         return par;
 405 }
 406
 407 /* this function expects that il->data_mutex is locked by caller */
 408 static void image_loader_emit_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 409 {
 410         ImageLoaderAreaParam *par = image_loader_queue_area_ready(il, &il->area_param_list, x, y, w, h);
 411
 412         if (par)
 413                 {
 414                 g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_area_ready_cb, par, NULL);
 415                 }
 416 }
 417
 418 /**************************************************************************************/
 419 /* the following functions may be executed in separate thread */
 420
 421 /* this function expects that il->data_mutex is locked by caller */
 422 static void image_loader_queue_delayed_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 423 {
 424         image_loader_queue_area_ready(il, &il->area_param_delayed_list, x, y, w, h);
 425 }
 426
 427
 428
 429 static gboolean image_loader_get_stopping(ImageLoader *il)
 430 {
 431         gboolean ret;
 432         if (!il) return FALSE;
 433
 434         g_mutex_lock(il->data_mutex);
 435         ret = il->stopping;
 436         g_mutex_unlock(il->data_mutex);
 437
 438         return ret;
 439 }
 440
 441
 442 static void image_loader_sync_pixbuf(ImageLoader *il)
 443 {
 444         GdkPixbuf *pb;
 445
 446         g_mutex_lock(il->data_mutex);
 447
 448         if (!il->loader)
 449                 {
 450                 g_mutex_unlock(il->data_mutex);
 451                 return;
 452                 }
 453
 454         pb = il->backend.get_pixbuf(il->loader);
 455
 456         if (pb == il->pixbuf)
 457                 {
 458                 g_mutex_unlock(il->data_mutex);
 459                 return;
 460                 }
 461
 462         if (g_ascii_strcasecmp(".jps", il->fd->extension) == 0)
 463                 {
 464                 g_object_set_data(G_OBJECT(pb), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 465                 }
 466
 467         if (il->pixbuf) g_object_unref(il->pixbuf);
 468
 469         il->pixbuf = pb;
 470         if (il->pixbuf) g_object_ref(il->pixbuf);
 471
 472         g_mutex_unlock(il->data_mutex);
 473 }
 474
 475 static void image_loader_area_updated_cb(gpointer UNUSED(loader),
 476                                  guint x, guint y, guint w, guint h,
 477                                  gpointer data)
 478 {
 479         ImageLoader *il = data;
 480
 481         if (!image_loader_get_pixbuf(il))
 482                 {
 483                 image_loader_sync_pixbuf(il);
 484                 if (!image_loader_get_pixbuf(il))
 485                         {
 486                         log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
 487                         }
 488                 }
 489
 490         g_mutex_lock(il->data_mutex);
 491         if (il->delay_area_ready)
 492                 image_loader_queue_delayed_area_ready(il, x, y, w, h);
 493         else
 494                 image_loader_emit_area_ready(il, x, y, w, h);
 495
 496         if (il->stopping) il->backend.abort(il->loader);
 497
 498         g_mutex_unlock(il->data_mutex);
 499 }
 500
 501 static void image_loader_area_prepared_cb(gpointer loader, gpointer data)
 502 {
 503         ImageLoader *il = data;
 504         GdkPixbuf *pb;
 505         guchar *pix;
 506         size_t h, rs;
 507
 508         /* a workaround for
 509            https://bugzilla.gnome.org/show_bug.cgi?id=547669
 510            https://bugzilla.gnome.org/show_bug.cgi?id=589334
 511         */
 512         gchar *format = il->backend.get_format_name(loader);
 513         if (strcmp(format, "svg") == 0 ||
 514             strcmp(format, "xpm") == 0)
 515                 {
 516                 g_free(format);
 517                 return;
 518                 }
 519
 520         g_free(format);
 521
 522         pb = il->backend.get_pixbuf(loader);
 523
 524         h = gdk_pixbuf_get_height(pb);
 525         rs = gdk_pixbuf_get_rowstride(pb);
 526         pix = gdk_pixbuf_get_pixels(pb);
 527
 528         memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
 529
 530 }
 531
 532 static void image_loader_size_cb(gpointer loader,
 533                                  gint width, gint height, gpointer data)
 534 {
 535         ImageLoader *il = data;
 536         gchar **mime_types;
 537         gboolean scale = FALSE;
 538         gint n;
 539
 540         g_mutex_lock(il->data_mutex);
 541         il->actual_width = width;
 542         il->actual_height = height;
 543         if (il->requested_width < 1 || il->requested_height < 1)
 544                 {
 545                 g_mutex_unlock(il->data_mutex);
 546                 image_loader_emit_size(il);
 547                 return;
 548                 }
 549         g_mutex_unlock(il->data_mutex);
 550
 551 #ifdef HAVE_FFMPEGTHUMBNAILER
 552         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 553                 scale = TRUE;
 554 #endif
 555         mime_types = il->backend.get_format_mime_types(loader);
 556         n = 0;
 557         while (mime_types[n] && !scale)
 558                 {
 559                 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
 560                 n++;
 561                 }
 562         g_strfreev(mime_types);
 563
 564         if (!scale)
 565                 {
 566                 image_loader_emit_size(il);
 567                 return;
 568                 }
 569
 570         g_mutex_lock(il->data_mutex);
 571
 572         gint nw, nh;
 573         if (width > il->requested_width || height > il->requested_height)
 574                 {
 575
 576                 if (((gdouble)il->requested_width / width) < ((gdouble)il->requested_height / height))
 577                         {
 578                         nw = il->requested_width;
 579                         nh = (gdouble)nw / width * height;
 580                         if (nh < 1) nh = 1;
 581                         }
 582                 else
 583                         {
 584                         nh = il->requested_height;
 585                         nw = (gdouble)nh / height * width;
 586                         if (nw < 1) nw = 1;
 587                         }
 588
 589                 il->actual_width = nw;
 590                 il->actual_height = nh;
 591                 il->backend.set_size(loader, nw, nh);
 592                 il->shrunk = TRUE;
 593                 }
 594
 595         g_mutex_unlock(il->data_mutex);
 596         image_loader_emit_size(il);
 597 }
 598
 599 static void image_loader_stop_loader(ImageLoader *il)
 600 {
 601         if (!il) return;
 602
 603         if (il->loader)
 604                 {
 605                 /* some loaders do not have a pixbuf till close, order is important here */
 606                 il->backend.close(il->loader, il->error ? NULL : &il->error); /* we are interested in the first error only */
 607                 image_loader_sync_pixbuf(il);
 608                 il->backend.free(il->loader);
 609                 il->loader = NULL;
 610                 }
 611         g_mutex_lock(il->data_mutex);
 612         il->done = TRUE;
 613         g_mutex_unlock(il->data_mutex);
 614 }
 615
 616 static void image_loader_setup_loader(ImageLoader *il)
 617 {
 618 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 619         gchar *format;
 620 #endif
 621
 622         gint external_preview = 1;
 623
 624         g_mutex_lock(il->data_mutex);
 625
 626         if (options->external_preview.enable)
 627                 {
 628                 gchar *cmd_line;
 629                 gchar *tilde_filename;
 630
 631                 tilde_filename = expand_tilde(options->external_preview.select);
 632
 633                 cmd_line = g_strdup_printf("\"%s\" \"%s\"" , tilde_filename, il->fd->path);
 634
 635                 external_preview = runcmd(cmd_line);
 636                 g_free(cmd_line);
 637                 g_free(tilde_filename);
 638                 }
 639
 640         if (external_preview == 0)
 641                 {
 642                 DEBUG_1("Using custom external loader");
 643                 image_loader_backend_set_external(&il->backend);
 644                 }
 645         else
 646
 647 #ifdef HAVE_FFMPEGTHUMBNAILER
 648         if (il->fd->format_class == FORMAT_CLASS_VIDEO)
 649                 {
 650                 DEBUG_1("Using custom ffmpegthumbnailer loader");
 651                 image_loader_backend_set_ft(&il->backend);
 652                 }
 653         else
 654 #endif
 655 #ifdef HAVE_PDF
 656         if (il->bytes_total >= 4 &&
 657             (memcmp(il->mapped_file + 0, "%PDF", 4) == 0))
 658                 {
 659                 DEBUG_1("Using custom pdf loader");
 660                 image_loader_backend_set_pdf(&il->backend);
 661                 }
 662         else
 663 #endif
 664 #ifdef HAVE_HEIF
 665         if (il->bytes_total >= 12 &&
 666                 ((memcmp(il->mapped_file + 4, "ftypheic", 8) == 0) ||
 667                 (memcmp(il->mapped_file + 4, "ftypmsf1", 8) == 0) ||
 668                 (memcmp(il->mapped_file + 4, "ftypmif1", 8) == 0) ||
 669                 (memcmp(il->mapped_file + 4, "ftypavif", 8) == 0)))
 670                 {
 671                 DEBUG_1("Using custom heif loader");
 672                 image_loader_backend_set_heif(&il->backend);
 673                 }
 674         else
 675 #endif
 676 #ifdef HAVE_WEBP
 677         if (il->bytes_total >= 12 &&
 678                 (memcmp(il->mapped_file, "RIFF", 4) == 0) &&
 679                 (memcmp(il->mapped_file + 8, "WEBP", 4) == 0))
 680                 {
 681                 DEBUG_1("Using custom webp loader");
 682                 image_loader_backend_set_webp(&il->backend);
 683                 }
 684         else
 685 #endif
 686 #ifdef HAVE_DJVU
 687         if (il->bytes_total >= 16 &&
 688                 (memcmp(il->mapped_file, "AT&TFORM", 8) == 0) &&
 689                 (memcmp(il->mapped_file + 12, "DJV", 3) == 0))
 690                 {
 691                 DEBUG_1("Using custom djvu loader");
 692                 image_loader_backend_set_djvu(&il->backend);
 693                 }
 694         else
 695 #endif
 696 #ifdef HAVE_JPEG
 697         if (il->bytes_total >= 2 && il->mapped_file[0] == 0xff && il->mapped_file[1] == 0xd8)
 698                 {
 699                 DEBUG_1("Using custom jpeg loader");
 700                 image_loader_backend_set_jpeg(&il->backend);
 701                 }
 702 #ifndef HAVE_RAW
 703         else
 704         if (il->bytes_total >= 11 &&
 705                 (memcmp(il->mapped_file + 4, "ftypcrx", 7) == 0) &&
 706                 (memcmp(il->mapped_file + 64, "CanonCR3", 8) == 0))
 707                 {
 708                 DEBUG_1("Using custom cr3 loader");
 709                 image_loader_backend_set_cr3(&il->backend);
 710                 }
 711 #endif
 712         else
 713 #endif
 714 #ifdef HAVE_TIFF
 715         if (il->bytes_total >= 10 &&
 716             (memcmp(il->mapped_file, "MM\0*", 4) == 0 ||
 717              memcmp(il->mapped_file, "MM\0+\0\x08\0\0", 8) == 0 ||
 718              memcmp(il->mapped_file, "II+\0\x08\0\0\0", 8) == 0 ||
 719              memcmp(il->mapped_file, "II*\0", 4) == 0))
 720                 {
 721                 DEBUG_1("Using custom tiff loader");
 722                 image_loader_backend_set_tiff(&il->backend);
 723                 }
 724         else
 725 #endif
 726         if (il->bytes_total >= 3 && il->mapped_file[0] == 0x44 && il->mapped_file[1] == 0x44 && il->mapped_file[2] == 0x53)
 727                 {
 728                 DEBUG_1("Using dds loader");
 729                 image_loader_backend_set_dds(&il->backend);
 730                 }
 731         else
 732         if (il->bytes_total >= 6 &&
 733                 (memcmp(il->mapped_file, "8BPS\0\x01", 6) == 0))
 734                 {
 735                 DEBUG_1("Using custom psd loader");
 736                 image_loader_backend_set_psd(&il->backend);
 737                 }
 738         else
 739 #ifdef HAVE_J2K
 740         if (il->bytes_total >= 12 &&
 741                 (memcmp(il->mapped_file, "\0\0\0\x0CjP\x20\x20\x0D\x0A\x87\x0A", 12) == 0))
 742                 {
 743                 DEBUG_1("Using custom j2k loader");
 744                 image_loader_backend_set_j2k(&il->backend);
 745                 }
 746         else
 747 #endif
 748 #ifdef HAVE_JPEGXL
 749         if (il->bytes_total >= 12 &&
 750                 (memcmp(il->mapped_file, "\0\0\0\x0C\x4A\x58\x4C\x20\x0D\x0A\x87\x0A", 12) == 0))
 751                 {
 752                 DEBUG_1("Using custom jpeg xl loader");
 753                 image_loader_backend_set_jpegxl(&il->backend);
 754                 }
 755         else
 756         if (il->bytes_total >= 2 &&
 757                 (memcmp(il->mapped_file, "\xFF\x0A", 2) == 0))
 758                 {
 759                 DEBUG_1("Using custom jpeg xl loader");
 760                 image_loader_backend_set_jpegxl(&il->backend);
 761                 }
 762         else
 763 #endif
 764         if ((il->bytes_total == 6144 || il->bytes_total == 6912) &&
 765                 (file_extension_match(il->fd->path, ".scr")))
 766                 {
 767                 DEBUG_1("Using custom zxscr loader");
 768                 image_loader_backend_set_zxscr(&il->backend);
 769                 }
 770         else
 771         if (il->fd->format_class == FORMAT_CLASS_COLLECTION)
 772                 {
 773                 DEBUG_1("Using custom collection loader");
 774                 image_loader_backend_set_collection(&il->backend);
 775                 }
 776         else
 777         if (g_strcmp0(strrchr(il->fd->path, '.'), ".svgz") == 0)
 778                 {
 779                 DEBUG_1("Using custom svgz loader");
 780                 image_loader_backend_set_svgz(&il->backend);
 781                 }
 782         else
 783                 image_loader_backend_set_default(&il->backend);
 784
 785         il->loader = il->backend.loader_new(image_loader_area_updated_cb, image_loader_size_cb, image_loader_area_prepared_cb, il);
 786
 787 #ifdef HAVE_TIFF
 788         format = il->backend.get_format_name(il->loader);
 789         if (g_strcmp0(format, "tiff") == 0)
 790                 {
 791                 il->backend.set_page_num(il->loader, il->fd->page_num);
 792                 }
 793         g_free(format);
 794 #endif
 795
 796 #ifdef HAVE_PDF
 797         format = il->backend.get_format_name(il->loader);
 798         if (g_strcmp0(format, "pdf") == 0)
 799                 {
 800                 il->backend.set_page_num(il->loader, il->fd->page_num);
 801                 }
 802         g_free(format);
 803 #endif
 804
 805 #ifdef HAVE_HEIF
 806         format = il->backend.get_format_name(il->loader);
 807         if (g_strcmp0(format, "heif") == 0)
 808                 {
 809                 il->backend.set_page_num(il->loader, il->fd->page_num);
 810                 }
 811         g_free(format);
 812 #endif
 813
 814 #ifdef HAVE_DJVU
 815         format = il->backend.get_format_name(il->loader);
 816         if (g_strcmp0(format, "djvu") == 0)
 817                 {
 818                 il->backend.set_page_num(il->loader, il->fd->page_num);
 819                 }
 820         g_free(format);
 821 #endif
 822
 823         il->fd->format_name = il->backend.get_format_name(il->loader);
 824
 825         g_mutex_unlock(il->data_mutex);
 826 }
 827
 828
 829 static void image_loader_done(ImageLoader *il)
 830 {
 831         image_loader_stop_loader(il);
 832
 833         image_loader_emit_done(il);
 834 }
 835
 836 static void image_loader_error(ImageLoader *il)
 837 {
 838         image_loader_stop_loader(il);
 839
 840         DEBUG_1("pixbuf_loader reported load error for: %s", il->fd->path);
 841
 842         image_loader_emit_error(il);
 843 }
 844
 845 static gboolean image_loader_continue(ImageLoader *il)
 846 {
 847         gint b;
 848         gint c;
 849
 850         if (!il) return FALSE;
 851
 852         c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
 853         while (c > 0 && !image_loader_get_stopping(il))
 854                 {
 855                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 856
 857                 if (b == 0)
 858                         {
 859                         image_loader_done(il);
 860                         return FALSE;
 861                         }
 862
 863                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 864                         {
 865                         image_loader_error(il);
 866                         return FALSE;
 867                         }
 868
 869                 il->bytes_read += b;
 870
 871                 c--;
 872                 }
 873
 874         if (il->bytes_total > 0)
 875                 {
 876                 image_loader_emit_percent(il);
 877                 }
 878
 879         return TRUE;
 880 }
 881
 882 static gboolean image_loader_begin(ImageLoader *il)
 883 {
 884 #if defined HAVE_TIFF || defined HAVE_PDF || defined HAVE_HEIF || defined HAVE_DJVU
 885         gchar *format;
 886 #endif
 887         gssize b;
 888
 889         if (il->pixbuf) return FALSE;
 890
 891         b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 892         if (b < 1) return FALSE;
 893
 894         image_loader_setup_loader(il);
 895
 896         g_assert(il->bytes_read == 0);
 897         if (il->backend.load) {
 898                 b = il->bytes_total;
 899                 if (!il->backend.load(il->loader, il->mapped_file, b, &il->error))
 900                         {
 901                         image_loader_stop_loader(il);
 902                         return FALSE;
 903                         }
 904         }
 905         else if (!il->backend.write(il->loader, il->mapped_file, b, &il->error))
 906                 {
 907                 image_loader_stop_loader(il);
 908                 return FALSE;
 909                 }
 910
 911 #ifdef HAVE_PDF
 912         format = il->backend.get_format_name(il->loader);
 913         if (g_strcmp0(format, "pdf") == 0)
 914                 {
 915                 gint i = il->backend.get_page_total(il->loader);
 916                 file_data_set_page_total(il->fd, i);
 917                 }
 918         g_free(format);
 919 #endif
 920 #ifdef HAVE_HEIF
 921         format = il->backend.get_format_name(il->loader);
 922         if (g_strcmp0(format, "heif") == 0)
 923                 {
 924                 gint i = il->backend.get_page_total(il->loader);
 925                 file_data_set_page_total(il->fd, i);
 926                 }
 927         g_free(format);
 928 #endif
 929 #ifdef HAVE_DJVU
 930         format = il->backend.get_format_name(il->loader);
 931         if (g_strcmp0(format, "djvu") == 0)
 932                 {
 933                 gint i = il->backend.get_page_total(il->loader);
 934                 file_data_set_page_total(il->fd, i);
 935                 }
 936         g_free(format);
 937 #endif
 938 #ifdef HAVE_TIFF
 939         format = il->backend.get_format_name(il->loader);
 940         if (g_strcmp0(format, "tiff") == 0)
 941                 {
 942                 gint i = il->backend.get_page_total(il->loader);
 943                 file_data_set_page_total(il->fd, i);
 944                 }
 945         g_free(format);
 946 #endif
 947
 948         il->bytes_read += b;
 949
 950         /* read until size is known */
 951         while (il->loader && !il->backend.get_pixbuf(il->loader) && b > 0 && !image_loader_get_stopping(il))
 952                 {
 953                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 954                 if (b < 0 || (b > 0 && !il->backend.write(il->loader, il->mapped_file + il->bytes_read, b, &il->error)))
 955                         {
 956                         image_loader_stop_loader(il);
 957                         return FALSE;
 958                         }
 959                 il->bytes_read += b;
 960                 }
 961         if (!il->pixbuf) image_loader_sync_pixbuf(il);
 962
 963         if (il->bytes_read == il->bytes_total || b < 1)
 964                 {
 965                 /* done, handle (broken) loaders that do not have pixbuf till close */
 966                 image_loader_stop_loader(il);
 967
 968                 if (!il->pixbuf) return FALSE;
 969
 970                 image_loader_done(il);
 971                 return TRUE;
 972                 }
 973
 974         if (!il->pixbuf)
 975                 {
 976                 image_loader_stop_loader(il);
 977                 return FALSE;
 978                 }
 979
 980         return TRUE;
 981 }
 982
 983 /**************************************************************************************/
 984 /* the following functions are always executed in the main thread */
 985
 986
 987 static gboolean image_loader_setup_source(ImageLoader *il)
 988 {
 989         struct stat st;
 990         gchar *pathl;
 991
 992         if (!il || il->loader || il->mapped_file) return FALSE;
 993
 994         il->mapped_file = NULL;
 995
 996         if (il->fd)
 997                 {
 998                 ExifData *exif = exif_read_fd(il->fd);
 999
1000                 if (options->thumbnails.use_exif)
1001                         {
1002                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, il->requested_width, il->requested_height);
1003
1004                         if (il->mapped_file)
1005                                 {
1006                                 il->preview = IMAGE_LOADER_PREVIEW_EXIF;
1007                                 }
1008                         }
1009                 else
1010                         {
1011                         il->mapped_file = exif_get_preview(exif, (guint *)&il->bytes_total, 0, 0); /* get the largest available preview image or NULL for normal images*/
1012
1013                         if (il->mapped_file)
1014                                 {
1015                                 /* Both exiv2 and libraw sometimes return a pointer to a file
1016                                  * section that is not a jpeg */
1017                                 if (!(il->mapped_file[0] == 0xFF && il->mapped_file[1] == 0xD8))
1018                                         {
1019                                         il->mapped_file = NULL;
1020                                         }
1021                                 else
1022                                         {
1023                                         il->preview = IMAGE_LOADER_PREVIEW_EXIF;
1024                                         }
1025                                 }
1026                         }
1027
1028                 /* If exiv2 does not find a thumbnail, try libraw (which may be slower) */
1029                 if (!il->mapped_file)
1030                         {
1031                         il->mapped_file = libraw_get_preview(il, (guint *)&il->bytes_total);
1032
1033                         if (il->mapped_file)
1034                                 {
1035                                 if (!(il->mapped_file[0] == 0xFF && il->mapped_file[1] == 0xD8))
1036                                         {
1037                                         il->mapped_file = NULL;
1038                                         }
1039                                 else
1040                                         {
1041                                         il->preview = IMAGE_LOADER_PREVIEW_LIBRAW;
1042                                         }
1043                                 }
1044                         }
1045
1046                 if (il->mapped_file)
1047                         {
1048                         DEBUG_1("Usable reduced size (preview) image loaded from file %s", il->fd->path);
1049                         }
1050                 exif_free_fd(il->fd, exif);
1051                 }
1052
1053
1054         if (!il->mapped_file)
1055                 {
1056                 /* normal file */
1057                 gint load_fd;
1058
1059                 pathl = path_from_utf8(il->fd->path);
1060                 load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
1061                 g_free(pathl);
1062                 if (load_fd == -1) return FALSE;
1063
1064                 if (fstat(load_fd, &st) == 0)
1065                         {
1066                         il->bytes_total = st.st_size;
1067                         }
1068                 else
1069                         {
1070                         close(load_fd);
1071                         return FALSE;
1072                         }
1073
1074                 il->mapped_file = mmap(0, il->bytes_total, PROT_READ|PROT_WRITE, MAP_PRIVATE, load_fd, 0);
1075                 close(load_fd);
1076                 if (il->mapped_file == MAP_FAILED)
1077                         {
1078                         il->mapped_file = 0;
1079                         return FALSE;
1080                         }
1081                 il->preview = IMAGE_LOADER_PREVIEW_NONE;
1082                 }
1083
1084         return TRUE;
1085 }
1086
1087 static void image_loader_stop_source(ImageLoader *il)
1088 {
1089         if (!il) return;
1090
1091         if (il->mapped_file)
1092                 {
1093                 if (il->preview == IMAGE_LOADER_PREVIEW_EXIF)
1094                         {
1095                         exif_free_preview(il->mapped_file);
1096                         }
1097                 else if (il->preview == IMAGE_LOADER_PREVIEW_LIBRAW)
1098                         {
1099                         libraw_free_preview(il->mapped_file);
1100                         }
1101                 else
1102                         {
1103                         munmap(il->mapped_file, il->bytes_total);
1104                         }
1105                 il->mapped_file = NULL;
1106                 }
1107 }
1108
1109 static void image_loader_stop(ImageLoader *il)
1110 {
1111         if (!il) return;
1112
1113         if (il->idle_id)
1114                 {
1115                 g_source_remove(il->idle_id);
1116                 il->idle_id = 0;
1117                 }
1118
1119         if (il->thread)
1120                 {
1121                 /* stop loader in the other thread */
1122                 g_mutex_lock(il->data_mutex);
1123                 il->stopping = TRUE;
1124                 while (!il->can_destroy) g_cond_wait(il->can_destroy_cond, il->data_mutex);
1125                 g_mutex_unlock(il->data_mutex);
1126                 }
1127
1128         image_loader_stop_loader(il);
1129         image_loader_stop_source(il);
1130
1131 }
1132
1133 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable)
1134 {
1135         g_mutex_lock(il->data_mutex);
1136         il->delay_area_ready = enable;
1137         if (!enable)
1138                 {
1139                 /* send delayed */
1140                 GList *list, *work;
1141                 list = g_list_reverse(il->area_param_delayed_list);
1142                 il->area_param_delayed_list = NULL;
1143                 g_mutex_unlock(il->data_mutex);
1144
1145                 work = list;
1146
1147                 while (work)
1148                         {
1149                         ImageLoaderAreaParam *par = work->data;
1150                         work = work->next;
1151
1152                         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, par->x, par->y, par->w, par->h);
1153                         g_free(par);
1154                         }
1155                 g_list_free(list);
1156                 }
1157         else
1158                 {
1159                 /* just unlock */
1160                 g_mutex_unlock(il->data_mutex);
1161                 }
1162 }
1163
1164
1165 /**************************************************************************************/
1166 /* execution via idle calls */
1167
1168 static gboolean image_loader_idle_cb(gpointer data)
1169 {
1170         gboolean ret = FALSE;
1171         ImageLoader *il = data;
1172
1173         if (il->idle_id)
1174                 {
1175                 ret = image_loader_continue(il);
1176                 }
1177
1178         if (!ret)
1179                 {
1180                 image_loader_stop_source(il);
1181                 }
1182
1183         return ret;
1184 }
1185
1186
1187 static gboolean image_loader_start_idle(ImageLoader *il)
1188 {
1189         gboolean ret;
1190
1191         if (!il) return FALSE;
1192
1193         if (!il->fd) return FALSE;
1194
1195         if (!image_loader_setup_source(il)) return FALSE;
1196
1197         ret = image_loader_begin(il);
1198
1199         if (ret && !il->done) il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, NULL);
1200         return ret;
1201 }
1202
1203 /**************************************************************************************/
1204 /* execution via thread */
1205
1206 static GThreadPool *image_loader_thread_pool = NULL;
1207
1208 static GCond *image_loader_prio_cond = NULL;
1209 static GMutex *image_loader_prio_mutex = NULL;
1210 static gint image_loader_prio_num = 0;
1211
1212
1213 static void image_loader_thread_enter_high(void)
1214 {
1215         g_mutex_lock(image_loader_prio_mutex);
1216         image_loader_prio_num++;
1217         g_mutex_unlock(image_loader_prio_mutex);
1218 }
1219
1220 static void image_loader_thread_leave_high(void)
1221 {
1222         g_mutex_lock(image_loader_prio_mutex);
1223         image_loader_prio_num--;
1224         if (image_loader_prio_num == 0) g_cond_broadcast(image_loader_prio_cond); /* wake up all low prio threads */
1225         g_mutex_unlock(image_loader_prio_mutex);
1226 }
1227
1228 static void image_loader_thread_wait_high(void)
1229 {
1230         g_mutex_lock(image_loader_prio_mutex);
1231         while (image_loader_prio_num)
1232                 {
1233                 g_cond_wait(image_loader_prio_cond, image_loader_prio_mutex);
1234                 }
1235
1236         g_mutex_unlock(image_loader_prio_mutex);
1237 }
1238
1239
1240 static void image_loader_thread_run(gpointer data, gpointer UNUSED(user_data))
1241 {
1242         ImageLoader *il = data;
1243         gboolean cont;
1244         gboolean err;
1245
1246         if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1247                 {
1248                 /* low prio, wait until high prio tasks finishes */
1249                 image_loader_thread_wait_high();
1250                 }
1251         else
1252                 {
1253                 /* high prio */
1254                 image_loader_thread_enter_high();
1255                 }
1256
1257         err = !image_loader_begin(il);
1258
1259         if (err)
1260                 {
1261                 /*
1262                 loader failed, we have to send signal
1263                 (idle mode returns the image_loader_begin return value directly)
1264                 (success is always reported indirectly from image_loader_begin)
1265                 */
1266                 image_loader_emit_error(il);
1267                 }
1268
1269         cont = !err;
1270
1271         while (cont && !image_loader_get_is_done(il) && !image_loader_get_stopping(il))
1272                 {
1273                 if (il->idle_priority > G_PRIORITY_DEFAULT_IDLE)
1274                         {
1275                         /* low prio, wait until high prio tasks finishes */
1276                         image_loader_thread_wait_high();
1277                         }
1278                 cont = image_loader_continue(il);
1279                 }
1280         image_loader_stop_loader(il);
1281
1282         if (il->idle_priority <= G_PRIORITY_DEFAULT_IDLE)
1283                 {
1284                 /* high prio */
1285                 image_loader_thread_leave_high();
1286                 }
1287
1288         g_mutex_lock(il->data_mutex);
1289         il->can_destroy = TRUE;
1290         g_cond_signal(il->can_destroy_cond);
1291         g_mutex_unlock(il->data_mutex);
1292
1293 }
1294
1295
1296 static gboolean image_loader_start_thread(ImageLoader *il)
1297 {
1298         if (!il) return FALSE;
1299
1300         if (!il->fd) return FALSE;
1301
1302         il->thread = TRUE;
1303
1304         if (!image_loader_setup_source(il)) return FALSE;
1305
1306         if (!image_loader_thread_pool)
1307                 {
1308                 image_loader_thread_pool = g_thread_pool_new(image_loader_thread_run, NULL, -1, FALSE, NULL);
1309                 if (!image_loader_prio_cond) image_loader_prio_cond = g_new(GCond, 1);
1310                 g_cond_init(image_loader_prio_cond);
1311                 if (!image_loader_prio_mutex) image_loader_prio_mutex = g_new(GMutex, 1);
1312                 g_mutex_init(image_loader_prio_mutex);
1313                 }
1314
1315         il->can_destroy = FALSE; /* ImageLoader can't be freed until image_loader_thread_run finishes */
1316
1317         g_thread_pool_push(image_loader_thread_pool, il, NULL);
1318         DEBUG_1("Thread pool num threads: %d", g_thread_pool_get_num_threads(image_loader_thread_pool));
1319
1320         return TRUE;
1321 }
1322
1323
1324 /**************************************************************************************/
1325 /* public interface */
1326
1327
1328 gboolean image_loader_start(ImageLoader *il)
1329 {
1330         if (!il) return FALSE;
1331
1332         if (!il->fd) return FALSE;
1333
1334         return image_loader_start_thread(il);
1335 }
1336
1337
1338 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
1339 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
1340 {
1341         GdkPixbuf *ret;
1342         if (!il) return NULL;
1343
1344         g_mutex_lock(il->data_mutex);
1345         ret = il->pixbuf;
1346         g_mutex_unlock(il->data_mutex);
1347         return ret;
1348 }
1349
1350 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
1351 {
1352         if (!il) return;
1353
1354         g_mutex_lock(il->data_mutex);
1355         il->requested_width = width;
1356         il->requested_height = height;
1357         g_mutex_unlock(il->data_mutex);
1358 }
1359
1360 void image_loader_set_buffer_size(ImageLoader *il, guint count)
1361 {
1362         if (!il) return;
1363
1364         g_mutex_lock(il->data_mutex);
1365         il->idle_read_loop_count = count ? count : 1;
1366         g_mutex_unlock(il->data_mutex);
1367 }
1368
1369 void image_loader_set_priority(ImageLoader *il, gint priority)
1370 {
1371         if (!il) return;
1372
1373         if (il->thread) return; /* can't change prio if the thread already runs */
1374         il->idle_priority = priority;
1375 }
1376
1377
1378 gdouble image_loader_get_percent(ImageLoader *il)
1379 {
1380         gdouble ret;
1381         if (!il) return 0.0;
1382
1383         g_mutex_lock(il->data_mutex);
1384         if (il->bytes_total == 0)
1385                 {
1386                 ret = 0.0;
1387                 }
1388         else
1389                 {
1390                 ret = (gdouble)il->bytes_read / il->bytes_total;
1391                 }
1392         g_mutex_unlock(il->data_mutex);
1393         return ret;
1394 }
1395
1396 gboolean image_loader_get_is_done(ImageLoader *il)
1397 {
1398         gboolean ret;
1399         if (!il) return FALSE;
1400
1401         g_mutex_lock(il->data_mutex);
1402         ret = il->done;
1403         g_mutex_unlock(il->data_mutex);
1404
1405         return ret;
1406 }
1407
1408 FileData *image_loader_get_fd(ImageLoader *il)
1409 {
1410         FileData *ret;
1411         if (!il) return NULL;
1412
1413         g_mutex_lock(il->data_mutex);
1414         ret = il->fd;
1415         g_mutex_unlock(il->data_mutex);
1416
1417         return ret;
1418 }
1419
1420 gboolean image_loader_get_shrunk(ImageLoader *il)
1421 {
1422         gboolean ret;
1423         if (!il) return FALSE;
1424
1425         g_mutex_lock(il->data_mutex);
1426         ret = il->shrunk;
1427         g_mutex_unlock(il->data_mutex);
1428         return ret;
1429 }
1430
1431 const gchar *image_loader_get_error(ImageLoader *il)
1432 {
1433         const gchar *ret = NULL;
1434         if (!il) return NULL;
1435         g_mutex_lock(il->data_mutex);
1436         if (il->error) ret = il->error->message;
1437         g_mutex_unlock(il->data_mutex);
1438         return ret;
1439 }
1440
1441
1442 /**
1443  *  @FIXME this can be rather slow and blocks until the size is known
1444  */
1445 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height)
1446 {
1447         ImageLoader *il;
1448         gboolean success;
1449
1450         il = image_loader_new(fd);
1451
1452         success = image_loader_start_idle(il);
1453
1454         if (success && il->pixbuf)
1455                 {
1456                 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
1457                 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
1458                 }
1459         else
1460                 {
1461                 if (width) *width = -1;
1462                 if (height) *height = -1;
1463                 }
1464
1465         image_loader_free(il);
1466
1467         return success;
1468 }
1469 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */