src/image_load_jpeg.c

   1 /*
   2  * Copyright (C) 1999 Michael Zucchi
   3  * Copyright (C) 1999 The Free Software Foundation
   4  * Copyright (C) 2004 John Ellis
   5  * Copyright (C) 2008 - 2016 The Geeqie Team
   6  *
   7  * Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
   8  *          Federico Mena-Quintero <federico@gimp.org>
   9  *          Michael Fulbright <drmike@redhat.com>
  10  *          Vladimir Nadvornik
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with this program; if not, write to the Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "main.h"
  28
  29 #include "image-load.h"
  30 #include "image_load_jpeg.h"
  31 #include "jpeg_parser.h"
  32
  33 #ifdef HAVE_JPEG
  34
  35 #include <setjmp.h>
  36 #include <jpeglib.h>
  37 #include <jerror.h>
  38
  39 typedef struct _ImageLoaderJpeg ImageLoaderJpeg;
  40 struct _ImageLoaderJpeg {
  41         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  42         ImageLoaderBackendCbSize size_cb;
  43         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  44
  45         gpointer data;
  46
  47         GdkPixbuf *pixbuf;
  48         guint requested_width;
  49         guint requested_height;
  50
  51         gboolean abort;
  52         gboolean stereo;
  53
  54 };
  55
  56 /* error handler data */
  57 struct error_handler_data {
  58         struct jpeg_error_mgr pub;
  59         sigjmp_buf setjmp_buffer;
  60         GError **error;
  61 };
  62
  63 /* explode gray image data from jpeg library into rgb components in pixbuf */
  64 static void
  65 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  66                        guchar **lines)
  67 {
  68         gint i, j;
  69         guint w;
  70
  71         g_return_if_fail (cinfo != NULL);
  72         g_return_if_fail (cinfo->output_components == 1);
  73         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  74
  75         /* Expand grey->colour.  Expand from the end of the
  76          * memory down, so we can use the same buffer.
  77          */
  78         w = cinfo->output_width;
  79         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  80                 guchar *from, *to;
  81
  82                 from = lines[i] + w - 1;
  83                 to = lines[i] + (w - 1) * 3;
  84                 for (j = w - 1; j >= 0; j--) {
  85                         to[0] = from[0];
  86                         to[1] = from[0];
  87                         to[2] = from[0];
  88                         to -= 3;
  89                         from--;
  90                 }
  91         }
  92 }
  93
  94
  95 static void
  96 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
  97                      guchar **lines)
  98 {
  99         gint i, j;
 100
 101         g_return_if_fail (cinfo != NULL);
 102         g_return_if_fail (cinfo->output_components == 4);
 103         g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
 104
 105         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
 106                 guchar *p;
 107
 108                 p = lines[i];
 109                 for (j = 0; j < cinfo->output_width; j++) {
 110                         int c, m, y, k;
 111                         c = p[0];
 112                         m = p[1];
 113                         y = p[2];
 114                         k = p[3];
 115                         if (cinfo->saw_Adobe_marker) {
 116                                 p[0] = k*c / 255;
 117                                 p[1] = k*m / 255;
 118                                 p[2] = k*y / 255;
 119                         }
 120                         else {
 121                                 p[0] = (255 - k)*(255 - c) / 255;
 122                                 p[1] = (255 - k)*(255 - m) / 255;
 123                                 p[2] = (255 - k)*(255 - y) / 255;
 124                         }
 125                         p[3] = 255;
 126                         p += 4;
 127                 }
 128         }
 129 }
 130
 131
 132 static gpointer image_loader_jpeg_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 133 {
 134         ImageLoaderJpeg *loader = g_new0(ImageLoaderJpeg, 1);
 135
 136         loader->area_updated_cb = area_updated_cb;
 137         loader->size_cb = size_cb;
 138         loader->area_prepared_cb = area_prepared_cb;
 139         loader->data = data;
 140         return (gpointer) loader;
 141 }
 142
 143 static void
 144 fatal_error_handler (j_common_ptr cinfo)
 145 {
 146         struct error_handler_data *errmgr;
 147         char buffer[JMSG_LENGTH_MAX];
 148
 149         errmgr = (struct error_handler_data *) cinfo->err;
 150
 151         /* Create the message */
 152         (* cinfo->err->format_message) (cinfo, buffer);
 153
 154         /* broken check for *error == NULL for robustness against
 155          * crappy JPEG library
 156          */
 157         if (errmgr->error && *errmgr->error == NULL) {
 158                 g_set_error (errmgr->error,
 159                              GDK_PIXBUF_ERROR,
 160                              cinfo->err->msg_code == JERR_OUT_OF_MEMORY
 161                              ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
 162                              : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
 163                              _("Error interpreting JPEG image file (%s)"),
 164                              buffer);
 165         }
 166
 167         siglongjmp (errmgr->setjmp_buffer, 1);
 168
 169         g_assert_not_reached ();
 170 }
 171
 172 static void
 173 output_message_handler (j_common_ptr cinfo)
 174 {
 175   /* This method keeps libjpeg from dumping crap to stderr */
 176
 177   /* do nothing */
 178 }
 179
 180
 181 void image_loader_jpeg_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
 182 {
 183         guchar *lines[4];
 184         guchar **lptr;
 185         gint i;
 186
 187         lptr = lines;
 188         for (i = 0; i < cinfo->rec_outbuf_height; i++)
 189                 {
 190                 *lptr++ = *dptr;
 191                 *dptr += rowstride;
 192                 }
 193
 194         jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
 195
 196         switch (cinfo->out_color_space)
 197                 {
 198                     case JCS_GRAYSCALE:
 199                       explode_gray_into_buf (cinfo, lines);
 200                       break;
 201                     case JCS_RGB:
 202                       /* do nothing */
 203                       break;
 204                     case JCS_CMYK:
 205                       convert_cmyk_to_rgb (cinfo, lines);
 206                       break;
 207                     default:
 208                       break;
 209                 }
 210 }
 211
 212
 213 static void init_source (j_decompress_ptr cinfo) {}
 214 static boolean fill_input_buffer (j_decompress_ptr cinfo)
 215 {
 216         ERREXIT(cinfo, JERR_INPUT_EMPTY);
 217         return TRUE;
 218 }
 219 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 220 {
 221         struct jpeg_source_mgr* src = (struct jpeg_source_mgr*) cinfo->src;
 222
 223         if (num_bytes > src->bytes_in_buffer)
 224                 {
 225                 ERREXIT(cinfo, JERR_INPUT_EOF);
 226                 }
 227         else if (num_bytes > 0)
 228                 {
 229                 src->next_input_byte += (size_t) num_bytes;
 230                 src->bytes_in_buffer -= (size_t) num_bytes;
 231                 }
 232 }
 233 static void term_source (j_decompress_ptr cinfo) {}
 234 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
 235 {
 236         struct jpeg_source_mgr* src;
 237
 238         if (cinfo->src == NULL)
 239                 {   /* first time for this JPEG object? */
 240                 cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) (
 241                                         (j_common_ptr) cinfo, JPOOL_PERMANENT,
 242                                         sizeof(struct jpeg_source_mgr));
 243                 }
 244
 245         src = (struct jpeg_source_mgr*) cinfo->src;
 246         src->init_source = init_source;
 247         src->fill_input_buffer = fill_input_buffer;
 248         src->skip_input_data = skip_input_data;
 249         src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
 250         src->term_source = term_source;
 251         src->bytes_in_buffer = nbytes;
 252         src->next_input_byte = (JOCTET*)buffer;
 253 }
 254
 255
 256 static gboolean image_loader_jpeg_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 257 {
 258         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 259         struct jpeg_decompress_struct cinfo;
 260         struct jpeg_decompress_struct cinfo2;
 261         guchar *dptr, *dptr2;
 262         guint rowstride;
 263         guchar *stereo_buf2 = NULL;
 264         guint stereo_length = 0;
 265
 266         struct error_handler_data jerr;
 267
 268         lj->stereo = FALSE;
 269 //      DEBUG_1("TG: JPG requested size w=%d:h=%d", lj->requested_width > 0, lj->requested_height);
 270
 271         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 272         if (mpo && mpo->num_images > 1)
 273                 {
 274                 guint i;
 275                 gint idx1 = -1, idx2 = -1;
 276                 guint num2 = 1;
 277
 278                 for (i = 0; i < mpo->num_images; i++)
 279                         {
 280                         if (mpo->images[i].type_code == 0x20002)
 281                                 {
 282                                 if (mpo->images[i].MPIndividualNum == 1)
 283                                         {
 284                                         idx1 = i;
 285                                         }
 286                                 else if (mpo->images[i].MPIndividualNum > num2)
 287                                         {
 288                                         idx2 = i;
 289                                         num2 = mpo->images[i].MPIndividualNum;
 290                                         }
 291                                 }
 292                         }
 293
 294                 if (idx1 >= 0 && idx2 >= 0)
 295                         {
 296                         lj->stereo = TRUE;
 297                         stereo_buf2 = (unsigned char *)buf + mpo->images[idx2].offset;
 298                         stereo_length = mpo->images[idx2].length;
 299                         buf = (unsigned char *)buf + mpo->images[idx1].offset;
 300                         count = mpo->images[idx1].length;
 301                         }
 302                 }
 303         jpeg_mpo_data_free(mpo);
 304
 305         /* setup error handler */
 306         cinfo.err = jpeg_std_error (&jerr.pub);
 307         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 308         jerr.pub.error_exit = fatal_error_handler;
 309         jerr.pub.output_message = output_message_handler;
 310
 311         jerr.error = error;
 312
 313
 314         if (setjmp(jerr.setjmp_buffer))
 315                 {
 316                 /* If we get here, the JPEG code has signaled an error.
 317                  * We need to clean up the JPEG object, close the input file, and return.
 318                 */
 319                 jpeg_destroy_decompress(&cinfo);
 320                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 321                 return FALSE;
 322                 }
 323
 324         jpeg_create_decompress(&cinfo);
 325
 326         set_mem_src(&cinfo, (unsigned char *)buf, count);
 327
 328
 329         jpeg_read_header(&cinfo, TRUE);
 330
 331         if (lj->stereo)
 332                 {
 333                 jpeg_create_decompress(&cinfo2);
 334                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 335                 jpeg_read_header(&cinfo2, TRUE);
 336
 337                 if (cinfo.image_width != cinfo2.image_width ||
 338                     cinfo.image_height != cinfo2.image_height)
 339                         {
 340                         DEBUG_1("stereo data with different size");
 341                         jpeg_destroy_decompress(&cinfo2);
 342                         lj->stereo = FALSE;
 343                         }
 344                 }
 345
 346
 347
 348         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 349         lj->requested_height = cinfo.image_height;
 350 //      DEBUG_1("TG: JPG requested size v2 w=%d:h=%d", lj->requested_width > 0, lj->requested_height);
 351         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 352
 353         cinfo.scale_num = 1;
 354         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 355                 jpeg_calc_output_dimensions(&cinfo);
 356                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 357                         cinfo.scale_denom /= 2;
 358                         break;
 359                 }
 360         }
 361         jpeg_calc_output_dimensions(&cinfo);
 362         if (lj->stereo)
 363                 {
 364                 cinfo2.scale_num = cinfo.scale_num;
 365                 cinfo2.scale_denom = cinfo.scale_denom;
 366                 jpeg_calc_output_dimensions(&cinfo2);
 367                 jpeg_start_decompress(&cinfo2);
 368                 }
 369
 370
 371         jpeg_start_decompress(&cinfo);
 372
 373
 374         if (lj->stereo)
 375                 {
 376                 if (cinfo.output_width != cinfo2.output_width ||
 377                     cinfo.output_height != cinfo2.output_height ||
 378                     cinfo.out_color_components != cinfo2.out_color_components)
 379                         {
 380                         DEBUG_1("stereo data with different output size");
 381                         jpeg_destroy_decompress(&cinfo2);
 382                         lj->stereo = FALSE;
 383                         }
 384                 }
 385
 386
 387         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 388                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 389                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 390
 391         if (!lj->pixbuf)
 392                 {
 393                 jpeg_destroy_decompress (&cinfo);
 394                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 395                 return 0;
 396                 }
 397         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 398         lj->area_prepared_cb(loader, lj->data);
 399
 400         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 401         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 402         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 403
 404
 405         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 406                 {
 407                 guint scanline = cinfo.output_scanline;
 408                 image_loader_jpeg_read_scanline(&cinfo, &dptr, rowstride);
 409                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 410                 if (lj->stereo)
 411                         {
 412                         guint scanline = cinfo2.output_scanline;
 413                         image_loader_jpeg_read_scanline(&cinfo2, &dptr2, rowstride);
 414                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 415                         }
 416                 }
 417
 418         jpeg_finish_decompress(&cinfo);
 419         jpeg_destroy_decompress(&cinfo);
 420         if (lj->stereo)
 421                 {
 422                 jpeg_finish_decompress(&cinfo);
 423                 jpeg_destroy_decompress(&cinfo);
 424                 }
 425
 426         return TRUE;
 427 }
 428
 429 static void image_loader_jpeg_set_size(gpointer loader, int width, int height)
 430 {
 431         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 432         lj->requested_width = width;
 433         lj->requested_height = height;
 434 }
 435
 436 static GdkPixbuf* image_loader_jpeg_get_pixbuf(gpointer loader)
 437 {
 438         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 439         return lj->pixbuf;
 440 }
 441
 442 static gchar* image_loader_jpeg_get_format_name(gpointer loader)
 443 {
 444         return g_strdup("jpeg");
 445 }
 446 static gchar** image_loader_jpeg_get_format_mime_types(gpointer loader)
 447 {
 448         static gchar *mime[] = {"image/jpeg", NULL};
 449         return g_strdupv(mime);
 450 }
 451
 452 static gboolean image_loader_jpeg_close(gpointer loader, GError **error)
 453 {
 454         return TRUE;
 455 }
 456
 457 static void image_loader_jpeg_abort(gpointer loader)
 458 {
 459         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 460         lj->abort = TRUE;
 461 }
 462
 463 static void image_loader_jpeg_free(gpointer loader)
 464 {
 465         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 466         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 467         g_free(lj);
 468 }
 469
 470
 471 void image_loader_backend_set_jpeg(ImageLoaderBackend *funcs)
 472 {
 473         funcs->loader_new = image_loader_jpeg_new;
 474         funcs->set_size = image_loader_jpeg_set_size;
 475         funcs->load = image_loader_jpeg_load;
 476         funcs->write = NULL;
 477         funcs->get_pixbuf = image_loader_jpeg_get_pixbuf;
 478         funcs->close = image_loader_jpeg_close;
 479         funcs->abort = image_loader_jpeg_abort;
 480         funcs->free = image_loader_jpeg_free;
 481
 482         funcs->get_format_name = image_loader_jpeg_get_format_name;
 483         funcs->get_format_mime_types = image_loader_jpeg_get_format_mime_types;
 484 }
 485
 486
 487
 488 #endif
 489
 490
 491 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */