src/image_load_jpeg.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2011 The Geeqie Team
   5  *
   6  * Author: Vladimir Nadvornik
   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 /* based on code from GdkPixbuf library - JPEG image loader
  14  *
  15  * Copyright (C) 1999 Michael Zucchi
  16  * Copyright (C) 1999 The Free Software Foundation
  17  *
  18  * Progressive loading code Copyright (C) 1999 Red Hat, Inc.
  19  *
  20  * Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
  21  *          Federico Mena-Quintero <federico@gimp.org>
  22  *          Michael Fulbright <drmike@redhat.com>
  23  *
  24  * This library is free software; you can redistribute it and/or
  25  * modify it under the terms of the GNU Lesser General Public
  26  * License as published by the Free Software Foundation; either
  27  * version 2 of the License, or (at your option) any later version.
  28  *
  29  * This library is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  32  * Lesser General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU Lesser General Public
  35  * License along with this library; if not, write to the
  36  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  37  * Boston, MA 02111-1307, USA.
  38  */
  39
  40
  41 #include "main.h"
  42 #include "image-load.h"
  43 #include "image_load_jpeg.h"
  44 #include "jpeg_parser.h"
  45
  46 #include <setjmp.h>
  47 #include <jpeglib.h>
  48 #include <jerror.h>
  49
  50 typedef struct _ImageLoaderJpeg ImageLoaderJpeg;
  51 struct _ImageLoaderJpeg {
  52         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  53         ImageLoaderBackendCbSize size_cb;
  54         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  55
  56         gpointer data;
  57
  58         GdkPixbuf *pixbuf;
  59         guint requested_width;
  60         guint requested_height;
  61
  62         gboolean abort;
  63         gboolean stereo;
  64
  65 };
  66
  67 /* error handler data */
  68 struct error_handler_data {
  69         struct jpeg_error_mgr pub;
  70         sigjmp_buf setjmp_buffer;
  71         GError **error;
  72 };
  73
  74 /* explode gray image data from jpeg library into rgb components in pixbuf */
  75 static void
  76 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  77                        guchar **lines)
  78 {
  79         gint i, j;
  80         guint w;
  81
  82         g_return_if_fail (cinfo != NULL);
  83         g_return_if_fail (cinfo->output_components == 1);
  84         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  85
  86         /* Expand grey->colour.  Expand from the end of the
  87          * memory down, so we can use the same buffer.
  88          */
  89         w = cinfo->output_width;
  90         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  91                 guchar *from, *to;
  92
  93                 from = lines[i] + w - 1;
  94                 to = lines[i] + (w - 1) * 3;
  95                 for (j = w - 1; j >= 0; j--) {
  96                         to[0] = from[0];
  97                         to[1] = from[0];
  98                         to[2] = from[0];
  99                         to -= 3;
 100                         from--;
 101                 }
 102         }
 103 }
 104
 105
 106 static void
 107 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
 108                      guchar **lines)
 109 {
 110         gint i, j;
 111
 112         g_return_if_fail (cinfo != NULL);
 113         g_return_if_fail (cinfo->output_components == 4);
 114         g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
 115
 116         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
 117                 guchar *p;
 118
 119                 p = lines[i];
 120                 for (j = 0; j < cinfo->output_width; j++) {
 121                         int c, m, y, k;
 122                         c = p[0];
 123                         m = p[1];
 124                         y = p[2];
 125                         k = p[3];
 126                         if (cinfo->saw_Adobe_marker) {
 127                                 p[0] = k*c / 255;
 128                                 p[1] = k*m / 255;
 129                                 p[2] = k*y / 255;
 130                         }
 131                         else {
 132                                 p[0] = (255 - k)*(255 - c) / 255;
 133                                 p[1] = (255 - k)*(255 - m) / 255;
 134                                 p[2] = (255 - k)*(255 - y) / 255;
 135                         }
 136                         p[3] = 255;
 137                         p += 4;
 138                 }
 139         }
 140 }
 141
 142
 143 static gpointer image_loader_jpeg_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 144 {
 145         ImageLoaderJpeg *loader = g_new0(ImageLoaderJpeg, 1);
 146
 147         loader->area_updated_cb = area_updated_cb;
 148         loader->size_cb = size_cb;
 149         loader->area_prepared_cb = area_prepared_cb;
 150         loader->data = data;
 151         return (gpointer) loader;
 152 }
 153
 154 static void
 155 fatal_error_handler (j_common_ptr cinfo)
 156 {
 157         struct error_handler_data *errmgr;
 158         char buffer[JMSG_LENGTH_MAX];
 159
 160         errmgr = (struct error_handler_data *) cinfo->err;
 161
 162         /* Create the message */
 163         (* cinfo->err->format_message) (cinfo, buffer);
 164
 165         /* broken check for *error == NULL for robustness against
 166          * crappy JPEG library
 167          */
 168         if (errmgr->error && *errmgr->error == NULL) {
 169                 g_set_error (errmgr->error,
 170                              GDK_PIXBUF_ERROR,
 171                              cinfo->err->msg_code == JERR_OUT_OF_MEMORY
 172                              ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
 173                              : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
 174                              _("Error interpreting JPEG image file (%s)"),
 175                              buffer);
 176         }
 177
 178         siglongjmp (errmgr->setjmp_buffer, 1);
 179
 180         g_assert_not_reached ();
 181 }
 182
 183 static void
 184 output_message_handler (j_common_ptr cinfo)
 185 {
 186   /* This method keeps libjpeg from dumping crap to stderr */
 187
 188   /* do nothing */
 189 }
 190
 191
 192 void image_loader_jpeg_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
 193 {
 194         guchar *lines[4];
 195         guchar **lptr;
 196         gint i;
 197
 198         lptr = lines;
 199         for (i = 0; i < cinfo->rec_outbuf_height; i++)
 200                 {
 201                 *lptr++ = *dptr;
 202                 *dptr += rowstride;
 203                 }
 204
 205         jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
 206
 207         switch (cinfo->out_color_space)
 208                 {
 209                     case JCS_GRAYSCALE:
 210                       explode_gray_into_buf (cinfo, lines);
 211                       break;
 212                     case JCS_RGB:
 213                       /* do nothing */
 214                       break;
 215                     case JCS_CMYK:
 216                       convert_cmyk_to_rgb (cinfo, lines);
 217                       break;
 218                     default:
 219                       break;
 220                 }
 221 }
 222
 223
 224 static void init_source (j_decompress_ptr cinfo) {}
 225 static boolean fill_input_buffer (j_decompress_ptr cinfo)
 226 {
 227         ERREXIT(cinfo, JERR_INPUT_EMPTY);
 228 }
 229 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 230 {
 231         struct jpeg_source_mgr* src = (struct jpeg_source_mgr*) cinfo->src;
 232
 233         if (num_bytes > 0)
 234                 {
 235                 src->next_input_byte += (size_t) num_bytes;
 236                 src->bytes_in_buffer -= (size_t) num_bytes;
 237                 }
 238 }
 239 static void term_source (j_decompress_ptr cinfo) {}
 240 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
 241 {
 242         struct jpeg_source_mgr* src;
 243
 244         if (cinfo->src == NULL)
 245                 {   /* first time for this JPEG object? */
 246                 cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) (
 247                                         (j_common_ptr) cinfo, JPOOL_PERMANENT,
 248                                         sizeof(struct jpeg_source_mgr));
 249                 }
 250
 251         src = (struct jpeg_source_mgr*) cinfo->src;
 252         src->init_source = init_source;
 253         src->fill_input_buffer = fill_input_buffer;
 254         src->skip_input_data = skip_input_data;
 255         src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
 256         src->term_source = term_source;
 257         src->bytes_in_buffer = nbytes;
 258         src->next_input_byte = (JOCTET*)buffer;
 259 }
 260
 261
 262 static gboolean image_loader_jpeg_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 263 {
 264         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 265         struct jpeg_decompress_struct cinfo;
 266         struct jpeg_decompress_struct cinfo2;
 267         guchar *dptr, *dptr2;
 268         guint rowstride;
 269         guchar *stereo_buf2 = NULL;
 270         guint stereo_length = 0;
 271
 272         struct error_handler_data jerr;
 273
 274         lj->stereo = FALSE;
 275
 276         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 277         if (mpo && mpo->num_images > 1)
 278                 {
 279                 lj->stereo = TRUE;
 280                 stereo_buf2 = (unsigned char *)buf + mpo->images[1].offset;
 281                 stereo_length = mpo->images[1].length;
 282                 }
 283         jpeg_mpo_data_free(mpo);
 284
 285         /* setup error handler */
 286         cinfo.err = jpeg_std_error (&jerr.pub);
 287         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 288         jerr.pub.error_exit = fatal_error_handler;
 289         jerr.pub.output_message = output_message_handler;
 290
 291         jerr.error = error;
 292
 293
 294         if (setjmp(jerr.setjmp_buffer))
 295                 {
 296                 /* If we get here, the JPEG code has signaled an error.
 297                  * We need to clean up the JPEG object, close the input file, and return.
 298                 */
 299                 jpeg_destroy_decompress(&cinfo);
 300                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 301                 return FALSE;
 302                 }
 303
 304         jpeg_create_decompress(&cinfo);
 305
 306         set_mem_src(&cinfo, (unsigned char *)buf, count);
 307
 308
 309         jpeg_read_header(&cinfo, TRUE);
 310
 311         if (lj->stereo)
 312                 {
 313                 jpeg_create_decompress(&cinfo2);
 314                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 315                 jpeg_read_header(&cinfo2, TRUE);
 316
 317                 if (cinfo.image_width != cinfo2.image_width ||
 318                     cinfo.image_height != cinfo2.image_height)
 319                         {
 320                         DEBUG_1("stereo data with different size");
 321                         jpeg_destroy_decompress(&cinfo2);
 322                         lj->stereo = FALSE;
 323                         }
 324                 }
 325
 326
 327
 328         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 329         lj->requested_height = cinfo.image_height;
 330         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 331
 332         cinfo.scale_num = 1;
 333         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 334                 jpeg_calc_output_dimensions(&cinfo);
 335                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 336                         cinfo.scale_denom /= 2;
 337                         break;
 338                 }
 339         }
 340         jpeg_calc_output_dimensions(&cinfo);
 341         if (lj->stereo)
 342                 {
 343                 cinfo2.scale_num = cinfo.scale_num;
 344                 cinfo2.scale_denom = cinfo.scale_denom;
 345                 jpeg_calc_output_dimensions(&cinfo2);
 346                 jpeg_start_decompress(&cinfo2);
 347                 }
 348
 349
 350         jpeg_start_decompress(&cinfo);
 351
 352
 353         if (lj->stereo)
 354                 {
 355                 if (cinfo.output_width != cinfo2.output_width ||
 356                     cinfo.output_height != cinfo2.output_height ||
 357                     cinfo.out_color_components != cinfo2.out_color_components)
 358                         {
 359                         DEBUG_1("stereo data with different output size");
 360                         jpeg_destroy_decompress(&cinfo2);
 361                         lj->stereo = FALSE;
 362                         }
 363                 }
 364
 365
 366         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 367                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 368                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 369
 370         if (!lj->pixbuf)
 371                 {
 372                 jpeg_destroy_decompress (&cinfo);
 373                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 374                 return 0;
 375                 }
 376         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 377         lj->area_prepared_cb(loader, lj->data);
 378
 379         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 380         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 381         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 382
 383
 384         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 385                 {
 386                 guint scanline = cinfo.output_scanline;
 387                 image_loader_jpeg_read_scanline(&cinfo, &dptr, rowstride);
 388                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 389                 if (lj->stereo)
 390                         {
 391                         guint scanline = cinfo2.output_scanline;
 392                         image_loader_jpeg_read_scanline(&cinfo2, &dptr2, rowstride);
 393                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 394                         }
 395                 }
 396
 397         jpeg_finish_decompress(&cinfo);
 398         jpeg_destroy_decompress(&cinfo);
 399         if (lj->stereo)
 400                 {
 401                 jpeg_finish_decompress(&cinfo);
 402                 jpeg_destroy_decompress(&cinfo);
 403                 }
 404
 405         return TRUE;
 406 }
 407
 408 static void image_loader_jpeg_set_size(gpointer loader, int width, int height)
 409 {
 410         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 411         lj->requested_width = width;
 412         lj->requested_height = height;
 413 }
 414
 415 static GdkPixbuf* image_loader_jpeg_get_pixbuf(gpointer loader)
 416 {
 417         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 418         return lj->pixbuf;
 419 }
 420
 421 static gchar* image_loader_jpeg_get_format_name(gpointer loader)
 422 {
 423         return g_strdup("jpeg");
 424 }
 425 static gchar** image_loader_jpeg_get_format_mime_types(gpointer loader)
 426 {
 427         static gchar *mime[] = {"image/jpeg", NULL};
 428         return g_strdupv(mime);
 429 }
 430
 431 static gboolean image_loader_jpeg_close(gpointer loader, GError **error)
 432 {
 433         return TRUE;
 434 }
 435
 436 static void image_loader_jpeg_abort(gpointer loader)
 437 {
 438         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 439         lj->abort = TRUE;
 440 }
 441
 442 static void image_loader_jpeg_free(gpointer loader)
 443 {
 444         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 445         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 446         g_free(lj);
 447 }
 448
 449
 450 void image_loader_backend_set_jpeg(ImageLoaderBackend *funcs)
 451 {
 452         funcs->loader_new = image_loader_jpeg_new;
 453         funcs->set_size = image_loader_jpeg_set_size;
 454         funcs->load = image_loader_jpeg_load;
 455         funcs->write = NULL;
 456         funcs->get_pixbuf = image_loader_jpeg_get_pixbuf;
 457         funcs->close = image_loader_jpeg_close;
 458         funcs->abort = image_loader_jpeg_abort;
 459         funcs->free = image_loader_jpeg_free;
 460
 461         funcs->get_format_name = image_loader_jpeg_get_format_name;
 462         funcs->get_format_mime_types = image_loader_jpeg_get_format_mime_types;
 463 }
 464
 465
 466