src/image-load.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "image-load.h"
  16
  17 #include "exif.h"
  18 #include "filedata.h"
  19 #include "ui_fileops.h"
  20 #include "gq-marshal.h"
  21
  22 #include <fcntl.h>
  23 #include <sys/mman.h>
  24
  25
  26 /**************************************************************************************/
  27 /* image looader class */
  28
  29
  30 enum {
  31         SIGNAL_AREA_READY = 0,
  32         SIGNAL_ERROR,
  33         SIGNAL_DONE,
  34         SIGNAL_PERCENT,
  35         SIGNAL_COUNT
  36 };
  37
  38 static guint signals[SIGNAL_COUNT] = { 0 };
  39
  40 static void image_loader_init (GTypeInstance *instance, gpointer g_class);
  41 static void image_loader_class_init (ImageLoaderClass *class);
  42 static void image_loader_finalize(GObject *object);
  43 static void image_loader_stop(ImageLoader *il);
  44
  45 GType image_loader_get_type (void)
  46 {
  47         static GType type = 0;
  48         if (type == 0)
  49                 {
  50                 static const GTypeInfo info = {
  51                         sizeof (ImageLoaderClass),
  52                         NULL,   /* base_init */
  53                         NULL,   /* base_finalize */
  54                         (GClassInitFunc)image_loader_class_init, /* class_init */
  55                         NULL,   /* class_finalize */
  56                         NULL,   /* class_data */
  57                         sizeof (ImageLoader),
  58                         0,      /* n_preallocs */
  59                         (GInstanceInitFunc)image_loader_init, /* instance_init */
  60                         NULL    /* value_table */
  61                         };
  62                 type = g_type_register_static (G_TYPE_OBJECT, "ImageLoaderType", &info, 0);
  63                 }
  64         return type;
  65 }
  66
  67 static void image_loader_init (GTypeInstance *instance, gpointer g_class)
  68 {
  69         ImageLoader *il = (ImageLoader *)instance;
  70
  71         il->pixbuf = NULL;
  72         il->idle_id = -1;
  73         il->idle_priority = G_PRIORITY_DEFAULT_IDLE;
  74         il->done = FALSE;
  75         il->loader = NULL;
  76
  77         il->bytes_read = 0;
  78         il->bytes_total = 0;
  79
  80         il->idle_done_id = -1;
  81
  82         il->idle_read_loop_count = options->image.idle_read_loop_count;
  83         il->read_buffer_size = options->image.read_buffer_size;
  84         il->mapped_file = NULL;
  85
  86         il->requested_width = 0;
  87         il->requested_height = 0;
  88         il->shrunk = FALSE;
  89
  90 #ifdef HAVE_GTHREAD
  91         il->data_mutex = g_mutex_new();
  92 #endif
  93         DEBUG_1("new image loader %p, bufsize=%u idle_loop=%u", il, il->read_buffer_size, il->idle_read_loop_count);
  94 }
  95
  96 static void image_loader_class_init (ImageLoaderClass *class)
  97 {
  98         GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  99
 100 //      gobject_class->set_property = image_loader_set_property;
 101 //      gobject_class->get_property = image_loader_get_property;
 102
 103         gobject_class->finalize = image_loader_finalize;
 104
 105
 106         signals[SIGNAL_AREA_READY] =
 107                 g_signal_new("area_ready",
 108                              G_OBJECT_CLASS_TYPE(gobject_class),
 109                              G_SIGNAL_RUN_LAST,
 110                              G_STRUCT_OFFSET(ImageLoaderClass, area_ready),
 111                              NULL, NULL,
 112                              gq_marshal_VOID__INT_INT_INT_INT,
 113                              G_TYPE_NONE, 4,
 114                              G_TYPE_INT,
 115                              G_TYPE_INT,
 116                              G_TYPE_INT,
 117                              G_TYPE_INT);
 118
 119         signals[SIGNAL_ERROR] =
 120                 g_signal_new("error",
 121                              G_OBJECT_CLASS_TYPE(gobject_class),
 122                              G_SIGNAL_RUN_LAST,
 123                              G_STRUCT_OFFSET(ImageLoaderClass, error),
 124                              NULL, NULL,
 125                              g_cclosure_marshal_VOID__VOID,
 126                              G_TYPE_NONE, 1,
 127                              GDK_TYPE_EVENT);
 128
 129         signals[SIGNAL_DONE] =
 130                 g_signal_new("done",
 131                              G_OBJECT_CLASS_TYPE(gobject_class),
 132                              G_SIGNAL_RUN_LAST,
 133                              G_STRUCT_OFFSET(ImageLoaderClass, done),
 134                              NULL, NULL,
 135                              g_cclosure_marshal_VOID__VOID,
 136                              G_TYPE_NONE, 0);
 137
 138         signals[SIGNAL_PERCENT] =
 139                 g_signal_new("percent",
 140                              G_OBJECT_CLASS_TYPE(gobject_class),
 141                              G_SIGNAL_RUN_LAST,
 142                              G_STRUCT_OFFSET(ImageLoaderClass, percent),
 143                              NULL, NULL,
 144                              g_cclosure_marshal_VOID__DOUBLE,
 145                              G_TYPE_NONE, 1,
 146                              G_TYPE_DOUBLE);
 147
 148 }
 149
 150 static void image_loader_finalize(GObject *object)
 151 {
 152         ImageLoader *il = (ImageLoader *)object;
 153
 154         image_loader_stop(il);
 155
 156         DEBUG_1("freeing image loader %p bytes_read=%d", il, il->bytes_read);
 157
 158         if (il->idle_done_id != -1) g_source_remove(il->idle_done_id);
 159
 160         while (g_source_remove_by_user_data(il))
 161                 {
 162                 DEBUG_1("pending signals detected");
 163                 }
 164
 165         while (il->area_param_list)
 166                 {
 167                 DEBUG_1("pending area_ready signals detected");
 168                 while (g_source_remove_by_user_data(il->area_param_list->data)) {}
 169                 g_free(il->area_param_list->data);
 170                 il->area_param_list = g_list_delete_link(il->area_param_list, il->area_param_list);
 171                 }
 172
 173         if (il->pixbuf) gdk_pixbuf_unref(il->pixbuf);
 174         file_data_unref(il->fd);
 175 #ifdef HAVE_GTHREAD
 176         g_mutex_free(il->data_mutex);
 177 #endif
 178 }
 179
 180 void image_loader_free(ImageLoader *il)
 181 {
 182         if (!il) return;
 183         g_object_unref(G_OBJECT(il));
 184 }
 185
 186
 187 ImageLoader *image_loader_new(FileData *fd)
 188 {
 189         ImageLoader *il;
 190
 191         if (!fd) return NULL;
 192
 193         il = (ImageLoader *) g_object_new(TYPE_IMAGE_LOADER, NULL);
 194
 195         il->fd = file_data_ref(fd);
 196
 197         return il;
 198 }
 199
 200 /**************************************************************************************/
 201 /* send signals via idle calbacks - the callback are executed in the main thread */
 202
 203 typedef struct _ImageLoaderAreaParam ImageLoaderAreaParam;
 204 struct _ImageLoaderAreaParam {
 205         ImageLoader *il;
 206         guint x;
 207         guint y;
 208         guint w;
 209         guint h;
 210 };
 211
 212
 213 static gint image_loader_emit_area_ready_cb(gpointer data)
 214 {
 215         ImageLoaderAreaParam *par = data;
 216         ImageLoader *il = par->il;
 217         g_signal_emit(il, signals[SIGNAL_AREA_READY], 0, par->x, par->y, par->w, par->h);
 218         g_mutex_lock(il->data_mutex);
 219         il->area_param_list = g_list_remove(il->area_param_list, par);
 220         g_free(par);
 221         g_mutex_unlock(il->data_mutex);
 222
 223         return FALSE;
 224 }
 225
 226 static gint image_loader_emit_done_cb(gpointer data)
 227 {
 228         ImageLoader *il = data;
 229         g_signal_emit(il, signals[SIGNAL_DONE], 0);
 230         return FALSE;
 231 }
 232
 233 static gint image_loader_emit_error_cb(gpointer data)
 234 {
 235         ImageLoader *il = data;
 236         g_signal_emit(il, signals[SIGNAL_ERROR], 0);
 237         return FALSE;
 238 }
 239
 240 static gint image_loader_emit_percent_cb(gpointer data)
 241 {
 242         ImageLoader *il = data;
 243         g_signal_emit(il, signals[SIGNAL_PERCENT], 0, image_loader_get_percent(il));
 244         return FALSE;
 245 }
 246
 247 /* DONE and ERROR are emited only once, thus they can have normal priority
 248    PERCENT and AREA_READY should be processed ASAP
 249 */
 250
 251 static void image_loader_emit_done(ImageLoader *il)
 252 {
 253         g_idle_add_full(il->idle_priority, image_loader_emit_done_cb, il, NULL);
 254 }
 255
 256 static void image_loader_emit_error(ImageLoader *il)
 257 {
 258         g_idle_add_full(il->idle_priority, image_loader_emit_error_cb, il, NULL);
 259 }
 260
 261 static void image_loader_emit_percent(ImageLoader *il)
 262 {
 263         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_percent_cb, il, NULL);
 264 }
 265
 266 static void image_loader_emit_area_ready(ImageLoader *il, guint x, guint y, guint w, guint h)
 267 {
 268         ImageLoaderAreaParam *par = g_new0(ImageLoaderAreaParam, 1);
 269         par->il = il;
 270         par->x = x;
 271         par->y = y;
 272         par->w = w;
 273         par->h = h;
 274
 275         g_mutex_lock(il->data_mutex);
 276         il->area_param_list = g_list_prepend(il->area_param_list, par);
 277         g_mutex_unlock(il->data_mutex);
 278
 279         g_idle_add_full(G_PRIORITY_HIGH, image_loader_emit_area_ready_cb, par, NULL);
 280 }
 281
 282 /**************************************************************************************/
 283 /* the following functions may be executed in separate thread */
 284
 285 static gint image_loader_get_stopping(ImageLoader *il)
 286 {
 287         gint ret;
 288         if (!il) return FALSE;
 289
 290         g_mutex_lock(il->data_mutex);
 291         ret = il->stopping;
 292         g_mutex_unlock(il->data_mutex);
 293
 294         return ret;
 295 }
 296
 297 static void image_loader_sync_pixbuf(ImageLoader *il)
 298 {
 299         GdkPixbuf *pb;
 300
 301         g_mutex_lock(il->data_mutex);
 302
 303         if (!il->loader)
 304                 {
 305                 g_mutex_unlock(il->data_mutex);
 306                 return;
 307                 }
 308
 309         pb = gdk_pixbuf_loader_get_pixbuf(il->loader);
 310
 311         if (pb == il->pixbuf)
 312                 {
 313                 g_mutex_unlock(il->data_mutex);
 314                 return;
 315                 }
 316
 317         if (il->pixbuf) gdk_pixbuf_unref(il->pixbuf);
 318         il->pixbuf = pb;
 319         if (il->pixbuf) gdk_pixbuf_ref(il->pixbuf);
 320         g_mutex_unlock(il->data_mutex);
 321 }
 322
 323 static void image_loader_area_updated_cb(GdkPixbufLoader *loader,
 324                                  guint x, guint y, guint w, guint h,
 325                                  gpointer data)
 326 {
 327         ImageLoader *il = data;
 328
 329         if (!image_loader_get_pixbuf(il))
 330                 {
 331                 image_loader_sync_pixbuf(il);
 332                 if (!image_loader_get_pixbuf(il))
 333                         {
 334                         log_printf("critical: area_ready signal with NULL pixbuf (out of mem?)\n");
 335                         }
 336                 }
 337         image_loader_emit_area_ready(il, x, y, w, h);
 338 }
 339
 340 static void image_loader_area_prepared_cb(GdkPixbufLoader *loader, gpointer data)
 341 {
 342         GdkPixbuf *pb;
 343         guchar *pix;
 344         size_t h, rs;
 345
 346         /* a workaround for http://bugzilla.gnome.org/show_bug.cgi?id=547669 */
 347         gchar *format = gdk_pixbuf_format_get_name(gdk_pixbuf_loader_get_format(loader));
 348         if (strcmp(format, "svg") == 0)
 349                 {
 350                 g_free(format);
 351                 return;
 352                 }
 353
 354         g_free(format);
 355
 356         pb = gdk_pixbuf_loader_get_pixbuf(loader);
 357
 358         h = gdk_pixbuf_get_height(pb);
 359         rs = gdk_pixbuf_get_rowstride(pb);
 360         pix = gdk_pixbuf_get_pixels(pb);
 361
 362         memset(pix, 0, rs * h); /*this should be faster than pixbuf_fill */
 363
 364 }
 365
 366 static void image_loader_size_cb(GdkPixbufLoader *loader,
 367                                  gint width, gint height, gpointer data)
 368 {
 369         ImageLoader *il = data;
 370         GdkPixbufFormat *format;
 371         gchar **mime_types;
 372         gint scale = FALSE;
 373         gint n;
 374
 375         g_mutex_lock(il->data_mutex);
 376         if (il->requested_width < 1 || il->requested_height < 1)
 377                 {
 378                 g_mutex_unlock(il->data_mutex);
 379                 return;
 380                 }
 381         g_mutex_unlock(il->data_mutex);
 382
 383         format = gdk_pixbuf_loader_get_format(loader);
 384         if (!format) return;
 385
 386         mime_types = gdk_pixbuf_format_get_mime_types(format);
 387         n = 0;
 388         while (mime_types[n])
 389                 {
 390                 if (strstr(mime_types[n], "jpeg")) scale = TRUE;
 391                 n++;
 392                 }
 393         g_strfreev(mime_types);
 394
 395         if (!scale) return;
 396
 397         g_mutex_lock(il->data_mutex);
 398
 399         if (width > il->requested_width || height > il->requested_height)
 400                 {
 401                 gint nw, nh;
 402
 403                 if (((gdouble)il->requested_width / width) < ((gdouble)il->requested_height / height))
 404                         {
 405                         nw = il->requested_width;
 406                         nh = (gdouble)nw / width * height;
 407                         if (nh < 1) nh = 1;
 408                         }
 409                 else
 410                         {
 411                         nh = il->requested_height;
 412                         nw = (gdouble)nh / height * width;
 413                         if (nw < 1) nw = 1;
 414                         }
 415
 416                 gdk_pixbuf_loader_set_size(loader, nw, nh);
 417                 il->shrunk = TRUE;
 418                 }
 419         g_mutex_unlock(il->data_mutex);
 420
 421 }
 422
 423 static void image_loader_stop_loader(ImageLoader *il)
 424 {
 425         if (!il) return;
 426
 427         if (il->loader)
 428                 {
 429                 /* some loaders do not have a pixbuf till close, order is important here */
 430                 gdk_pixbuf_loader_close(il->loader, NULL);
 431                 image_loader_sync_pixbuf(il);
 432                 g_object_unref(G_OBJECT(il->loader));
 433                 il->loader = NULL;
 434                 }
 435         g_mutex_lock(il->data_mutex);
 436         il->done = TRUE;
 437         g_mutex_unlock(il->data_mutex);
 438 }
 439
 440 static void image_loader_setup_loader(ImageLoader *il)
 441 {
 442         g_mutex_lock(il->data_mutex);
 443         il->loader = gdk_pixbuf_loader_new();
 444
 445         g_signal_connect(G_OBJECT(il->loader), "area_updated",
 446                          G_CALLBACK(image_loader_area_updated_cb), il);
 447         g_signal_connect(G_OBJECT(il->loader), "size_prepared",
 448                          G_CALLBACK(image_loader_size_cb), il);
 449         g_signal_connect(G_OBJECT(il->loader), "area_prepared",
 450                          G_CALLBACK(image_loader_area_prepared_cb), il);
 451         g_mutex_unlock(il->data_mutex);
 452 }
 453
 454
 455 static void image_loader_done(ImageLoader *il)
 456 {
 457         image_loader_stop_loader(il);
 458
 459         image_loader_emit_done(il);
 460 }
 461
 462 static void image_loader_error(ImageLoader *il)
 463 {
 464         image_loader_stop_loader(il);
 465
 466         DEBUG_1("pixbuf_loader reported load error for: %s", il->fd->path);
 467
 468         image_loader_emit_error(il);
 469 }
 470
 471 static gint image_loader_continue(ImageLoader *il)
 472 {
 473         gint b;
 474         gint c;
 475
 476         if (!il) return FALSE;
 477
 478         c = il->idle_read_loop_count ? il->idle_read_loop_count : 1;
 479         while (c > 0 && !image_loader_get_stopping(il))
 480                 {
 481                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 482
 483                 if (b == 0)
 484                         {
 485                         image_loader_done(il);
 486                         return FALSE;
 487                         }
 488
 489                 if (b < 0 || (b > 0 && !gdk_pixbuf_loader_write(il->loader, il->mapped_file + il->bytes_read, b, NULL)))
 490                         {
 491                         image_loader_error(il);
 492                         return FALSE;
 493                         }
 494
 495                 il->bytes_read += b;
 496
 497                 c--;
 498                 }
 499
 500         if (il->bytes_total > 0)
 501                 {
 502                 image_loader_emit_percent(il);
 503                 }
 504
 505         return TRUE;
 506 }
 507
 508 static gint image_loader_begin(ImageLoader *il)
 509 {
 510         gint b;
 511
 512         if (il->pixbuf) return FALSE;
 513
 514         b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 515         if (b < 1) return FALSE;
 516
 517         image_loader_setup_loader(il);
 518
 519         if (!gdk_pixbuf_loader_write(il->loader, il->mapped_file + il->bytes_read, b, NULL))
 520                 {
 521                 image_loader_stop_loader(il);
 522                 return FALSE;
 523                 }
 524
 525         il->bytes_read += b;
 526
 527         /* read until size is known */
 528         while (il->loader && !gdk_pixbuf_loader_get_pixbuf(il->loader) && b > 0 && !image_loader_get_stopping(il))
 529                 {
 530                 b = MIN(il->read_buffer_size, il->bytes_total - il->bytes_read);
 531                 if (b < 0 || (b > 0 && !gdk_pixbuf_loader_write(il->loader, il->mapped_file + il->bytes_read, b, NULL)))
 532                         {
 533                         image_loader_stop_loader(il);
 534                         return FALSE;
 535                         }
 536                 il->bytes_read += b;
 537                 }
 538         if (!il->pixbuf) image_loader_sync_pixbuf(il);
 539
 540         if (il->bytes_read == il->bytes_total || b < 1)
 541                 {
 542                 /* done, handle (broken) loaders that do not have pixbuf till close */
 543                 image_loader_stop_loader(il);
 544
 545                 if (!il->pixbuf) return FALSE;
 546
 547                 image_loader_done(il);
 548                 return TRUE;
 549                 }
 550
 551         if (!il->pixbuf)
 552                 {
 553                 image_loader_stop_loader(il);
 554                 return FALSE;
 555                 }
 556
 557         return TRUE;
 558 }
 559
 560 /**************************************************************************************/
 561 /* the following functions are always executed in the main thread */
 562
 563
 564 static gint image_loader_setup_source(ImageLoader *il)
 565 {
 566         struct stat st;
 567         gchar *pathl;
 568
 569         if (!il || il->loader || il->mapped_file) return FALSE;
 570
 571         il->mapped_file = NULL;
 572
 573         if (il->fd)
 574                 {
 575                 ExifData *exif = exif_read_fd(il->fd);
 576
 577                 il->mapped_file = exif_get_preview(exif, &il->bytes_total);
 578
 579                 if (il->mapped_file)
 580                         {
 581                         il->preview = TRUE;
 582                         DEBUG_1("Raw file %s contains embedded image", il->fd->path);
 583                         }
 584                 exif_free_fd(il->fd, exif);
 585                 }
 586
 587
 588         if (!il->mapped_file)
 589                 {
 590                 /* normal file */
 591                 gint load_fd;
 592
 593                 pathl = path_from_utf8(il->fd->path);
 594                 load_fd = open(pathl, O_RDONLY | O_NONBLOCK);
 595                 g_free(pathl);
 596                 if (load_fd == -1) return FALSE;
 597
 598                 if (fstat(load_fd, &st) == 0)
 599                         {
 600                         il->bytes_total = st.st_size;
 601                         }
 602                 else
 603                         {
 604                         close(load_fd);
 605                         return FALSE;
 606                         }
 607
 608                 il->mapped_file = mmap(0, il->bytes_total, PROT_READ|PROT_WRITE, MAP_PRIVATE, load_fd, 0);
 609                 close(load_fd);
 610                 if (il->mapped_file == MAP_FAILED)
 611                         {
 612                         il->mapped_file = 0;
 613                         return FALSE;
 614                         }
 615                 il->preview = FALSE;
 616                 }
 617
 618         return TRUE;
 619 }
 620
 621 static void image_loader_stop_source(ImageLoader *il)
 622 {
 623         if (!il) return;
 624
 625         if (il->mapped_file)
 626                 {
 627                 if (il->preview)
 628                         {
 629                         exif_free_preview(il->mapped_file);
 630                         }
 631                 else
 632                         {
 633                         munmap(il->mapped_file, il->bytes_total);
 634                         }
 635                 il->mapped_file = NULL;
 636                 }
 637 }
 638
 639 static void image_loader_stop(ImageLoader *il)
 640 {
 641         if (!il) return;
 642
 643         if (il->idle_id != -1)
 644                 {
 645                 g_source_remove(il->idle_id);
 646                 il->idle_id = -1;
 647                 }
 648
 649         if (il->thread)
 650                 {
 651                 g_mutex_lock(il->data_mutex);
 652                 il->stopping = TRUE;
 653                 g_mutex_unlock(il->data_mutex);
 654                 g_thread_join(il->thread);
 655                 }
 656
 657         image_loader_stop_loader(il);
 658         image_loader_stop_source(il);
 659
 660 }
 661
 662 /**************************************************************************************/
 663 /* execution via idle calls */
 664
 665 static gint image_loader_idle_cb(gpointer data)
 666 {
 667         gint ret = FALSE;
 668         ImageLoader *il = data;
 669         if (il->idle_id != -1)
 670                 {
 671                 ret = image_loader_continue(il);
 672                 }
 673         if (!ret)
 674                 {
 675                 image_loader_stop_source(il);
 676                 }
 677         return ret;
 678 }
 679
 680
 681 gint image_loader_start_idle(ImageLoader *il)
 682 {
 683         gint ret;
 684         if (!il) return FALSE;
 685
 686         if (!il->fd) return FALSE;
 687
 688         if (!image_loader_setup_source(il)) return FALSE;
 689
 690         ret = image_loader_begin(il);
 691
 692         if (ret && !il->done) il->idle_id = g_idle_add_full(il->idle_priority, image_loader_idle_cb, il, NULL);
 693         return ret;
 694 }
 695
 696 /**************************************************************************************/
 697 /* execution via thread */
 698
 699 gpointer image_loader_thread_run(gpointer data)
 700 {
 701         ImageLoader *il = data;
 702         gint cont = image_loader_begin(il);
 703
 704         while (cont && !image_loader_get_is_done(il) && !image_loader_get_stopping(il))
 705                 {
 706                 cont = image_loader_continue(il);
 707                 }
 708         image_loader_stop_loader(il);
 709         return NULL;
 710 }
 711
 712 gint image_loader_start_thread(ImageLoader *il)
 713 {
 714         if (!il) return FALSE;
 715
 716         if (!il->fd) return FALSE;
 717
 718         if (!image_loader_setup_source(il)) return FALSE;
 719
 720         il->thread = g_thread_create(image_loader_thread_run, il, TRUE, NULL);
 721         if (!il->thread) return FALSE;
 722
 723         return TRUE;
 724 }
 725
 726
 727 /**************************************************************************************/
 728 /* public interface */
 729
 730
 731 gint image_loader_start(ImageLoader *il)
 732 {
 733         if (!il) return FALSE;
 734
 735         if (!il->fd) return FALSE;
 736
 737 #ifdef HAVE_GTHREAD
 738         return image_loader_start_thread(il);
 739 #else
 740         return image_loader_start_idle(il);
 741 #endif
 742 }
 743
 744
 745 /* don't forget to gdk_pixbuf_ref() it if you want to use it after image_loader_free() */
 746 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il)
 747 {
 748         GdkPixbuf *ret;
 749         if (!il) return NULL;
 750
 751         g_mutex_lock(il->data_mutex);
 752         ret = il->pixbuf;
 753         g_mutex_unlock(il->data_mutex);
 754         return ret;
 755 }
 756
 757 gchar *image_loader_get_format(ImageLoader *il)
 758 {
 759         GdkPixbufFormat *format;
 760         gchar **mimev;
 761         gchar *mime;
 762
 763         if (!il || !il->loader) return NULL;
 764
 765         format = gdk_pixbuf_loader_get_format(il->loader);
 766         if (!format) return NULL;
 767
 768         mimev = gdk_pixbuf_format_get_mime_types(format);
 769         if (!mimev) return NULL;
 770
 771         /* return first member of mimev, as GdkPixbufLoader has no way to tell us which exact one ? */
 772         mime = g_strdup(mimev[0]);
 773         g_strfreev(mimev);
 774
 775         return mime;
 776 }
 777
 778 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height)
 779 {
 780         if (!il) return;
 781
 782         g_mutex_lock(il->data_mutex);
 783         il->requested_width = width;
 784         il->requested_height = height;
 785         g_mutex_unlock(il->data_mutex);
 786 }
 787
 788 void image_loader_set_buffer_size(ImageLoader *il, guint count)
 789 {
 790         if (!il) return;
 791
 792         g_mutex_lock(il->data_mutex);
 793         il->idle_read_loop_count = count ? count : 1;
 794         g_mutex_unlock(il->data_mutex);
 795 }
 796
 797 void image_loader_set_priority(ImageLoader *il, gint priority)
 798 {
 799         if (!il) return;
 800
 801         g_mutex_lock(il->data_mutex);
 802         il->idle_priority = priority;
 803         g_mutex_unlock(il->data_mutex);
 804 }
 805
 806
 807 gdouble image_loader_get_percent(ImageLoader *il)
 808 {
 809         gdouble ret;
 810         if (!il) return 0.0;
 811
 812         g_mutex_lock(il->data_mutex);
 813         if (il->bytes_total == 0)
 814                 {
 815                 ret = 0.0;
 816                 }
 817         else
 818                 {
 819                 ret = (gdouble)il->bytes_read / il->bytes_total;
 820                 }
 821         g_mutex_unlock(il->data_mutex);
 822         return ret;
 823 }
 824
 825 gint image_loader_get_is_done(ImageLoader *il)
 826 {
 827         gint ret;
 828         if (!il) return FALSE;
 829
 830         g_mutex_lock(il->data_mutex);
 831         ret = il->done;
 832         g_mutex_unlock(il->data_mutex);
 833
 834         return ret;
 835 }
 836
 837 FileData *image_loader_get_fd(ImageLoader *il)
 838 {
 839         FileData *ret;
 840         if (!il) return NULL;
 841
 842         g_mutex_lock(il->data_mutex);
 843         ret = il->fd;
 844         g_mutex_unlock(il->data_mutex);
 845
 846         return ret;
 847 }
 848
 849 gint image_loader_get_shrunk(ImageLoader *il)
 850 {
 851         gint ret;
 852         if (!il) return FALSE;
 853
 854         g_mutex_lock(il->data_mutex);
 855         ret = il->shrunk;
 856         g_mutex_unlock(il->data_mutex);
 857         return ret;
 858 }
 859
 860
 861 /* FIXME - this can be rather slow and blocks until the size is known */
 862 gint image_load_dimensions(FileData *fd, gint *width, gint *height)
 863 {
 864         ImageLoader *il;
 865         gint success;
 866
 867         il = image_loader_new(fd);
 868
 869         success = image_loader_start_idle(il);
 870
 871         if (success && il->pixbuf)
 872                 {
 873                 if (width) *width = gdk_pixbuf_get_width(il->pixbuf);
 874                 if (height) *height = gdk_pixbuf_get_height(il->pixbuf);;
 875                 }
 876         else
 877                 {
 878                 if (width) *width = -1;
 879                 if (height) *height = -1;
 880                 }
 881
 882         image_loader_free(il);
 883
 884         return success;
 885 }