src/image-load-jpeg.cc

   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 /** This is a Will Not Fix */
  28 #pragma GCC diagnostic ignored "-Wclobbered"
  29
  30 #include <config.h>
  31
  32 #ifdef HAVE_JPEG
  33
  34 #include "image-load-jpeg.h"
  35
  36 #include <csetjmp>
  37 #include <cstdio> // for FILE and size_t in jpeglib.h
  38
  39 #include <jerror.h>
  40 #include <jpeglib.h>
  41
  42 #include "debug.h"
  43 #include "image-load.h"
  44 #include "intl.h"
  45 #include "jpeg-parser.h"
  46 #include "typedefs.h"
  47
  48 struct ImageLoaderJpeg {
  49         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  50         ImageLoaderBackendCbSize size_cb;
  51         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  52
  53         gpointer data;
  54
  55         GdkPixbuf *pixbuf;
  56         guint requested_width;
  57         guint requested_height;
  58
  59         gboolean abort;
  60         gboolean stereo;
  61
  62 };
  63
  64 /* error handler data */
  65 struct error_handler_data {
  66         struct jpeg_error_mgr pub;
  67         sigjmp_buf setjmp_buffer;
  68         GError **error;
  69 };
  70
  71 /* explode gray image data from jpeg library into rgb components in pixbuf */
  72 static void
  73 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  74                        guchar **lines)
  75 {
  76         gint i;
  77         gint j;
  78         guint w;
  79
  80         g_return_if_fail (cinfo != nullptr);
  81         g_return_if_fail (cinfo->output_components == 1);
  82         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  83
  84         /* Expand grey->colour.  Expand from the end of the
  85          * memory down, so we can use the same buffer.
  86          */
  87         w = cinfo->output_width;
  88         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  89                 guchar *from;
  90                 guchar *to;
  91
  92                 from = lines[i] + w - 1;
  93                 to = lines[i] + (w - 1) * 3;
  94                 for (j = w - 1; j >= 0; j--) {
  95                         to[0] = from[0];
  96                         to[1] = from[0];
  97                         to[2] = from[0];
  98                         to -= 3;
  99                         from--;
 100                 }
 101         }
 102 }
 103
 104
 105 static void
 106 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
 107                      guchar **lines)
 108 {
 109         gint i;
 110         guint j;
 111
 112         g_return_if_fail (cinfo != nullptr);
 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;
 122                         int m;
 123                         int y;
 124                         int k;
 125                         c = p[0];
 126                         m = p[1];
 127                         y = p[2];
 128                         k = p[3];
 129                         if (cinfo->saw_Adobe_marker) {
 130                                 p[0] = k*c / 255;
 131                                 p[1] = k*m / 255;
 132                                 p[2] = k*y / 255;
 133                         }
 134                         else {
 135                                 p[0] = (255 - k)*(255 - c) / 255;
 136                                 p[1] = (255 - k)*(255 - m) / 255;
 137                                 p[2] = (255 - k)*(255 - y) / 255;
 138                         }
 139                         p[3] = 255;
 140                         p += 4;
 141                 }
 142         }
 143 }
 144
 145
 146 static gpointer image_loader_jpeg_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 147 {
 148         auto loader = g_new0(ImageLoaderJpeg, 1);
 149
 150         loader->area_updated_cb = area_updated_cb;
 151         loader->size_cb = size_cb;
 152         loader->area_prepared_cb = area_prepared_cb;
 153         loader->data = data;
 154         return loader;
 155 }
 156
 157 static void
 158 fatal_error_handler (j_common_ptr cinfo)
 159 {
 160         struct error_handler_data *errmgr;
 161         char buffer[JMSG_LENGTH_MAX];
 162
 163         errmgr = reinterpret_cast<struct error_handler_data *>(cinfo->err);
 164
 165         /* Create the message */
 166         (* cinfo->err->format_message) (cinfo, buffer);
 167
 168         /* broken check for *error == NULL for robustness against
 169          * crappy JPEG library
 170          */
 171         if (errmgr->error && *errmgr->error == nullptr) {
 172                 g_set_error (errmgr->error,
 173                              GDK_PIXBUF_ERROR,
 174                              cinfo->err->msg_code == JERR_OUT_OF_MEMORY
 175                              ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
 176                              : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
 177                              _("Error interpreting JPEG image file (%s)"),
 178                              buffer);
 179         }
 180
 181         siglongjmp (errmgr->setjmp_buffer, 1);
 182
 183         g_assert_not_reached ();
 184 }
 185
 186 static void
 187 output_message_handler (j_common_ptr)
 188 {
 189   /* This method keeps libjpeg from dumping crap to stderr */
 190
 191   /* do nothing */
 192 }
 193
 194
 195 void image_loader_jpeg_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
 196 {
 197         guchar *lines[4];
 198         guchar **lptr;
 199         gint i;
 200
 201         lptr = lines;
 202         for (i = 0; i < cinfo->rec_outbuf_height; i++)
 203                 {
 204                 *lptr++ = *dptr;
 205                 *dptr += rowstride;
 206                 }
 207
 208         jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
 209
 210         switch (cinfo->out_color_space)
 211                 {
 212                     case JCS_GRAYSCALE:
 213                       explode_gray_into_buf (cinfo, lines);
 214                       break;
 215                     case JCS_RGB:
 216                       /* do nothing */
 217                       break;
 218                     case JCS_CMYK:
 219                       convert_cmyk_to_rgb (cinfo, lines);
 220                       break;
 221                     default:
 222                       break;
 223                 }
 224 }
 225
 226
 227 static void init_source (j_decompress_ptr) {}
 228 static boolean fill_input_buffer (j_decompress_ptr cinfo)
 229 {
 230         ERREXIT(cinfo, JERR_INPUT_EMPTY);
 231         return TRUE;
 232 }
 233 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 234 {
 235         auto src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
 236
 237         if (static_cast<gulong>(num_bytes) > src->bytes_in_buffer)
 238                 {
 239                 ERREXIT(cinfo, JERR_INPUT_EOF);
 240                 }
 241         else if (num_bytes > 0)
 242                 {
 243                 src->next_input_byte += static_cast<size_t>(num_bytes);
 244                 src->bytes_in_buffer -= static_cast<size_t>(num_bytes);
 245                 }
 246 }
 247 static void term_source (j_decompress_ptr) {}
 248 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
 249 {
 250         struct jpeg_source_mgr* src;
 251
 252         if (cinfo->src == nullptr)
 253                 {   /* first time for this JPEG object? */
 254                 cinfo->src = static_cast<struct jpeg_source_mgr *>((*cinfo->mem->alloc_small) (
 255                                         reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT,
 256                                         sizeof(struct jpeg_source_mgr)));
 257                 }
 258
 259         src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
 260         src->init_source = init_source;
 261         src->fill_input_buffer = fill_input_buffer;
 262         src->skip_input_data = skip_input_data;
 263         src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
 264         src->term_source = term_source;
 265         src->bytes_in_buffer = nbytes;
 266         src->next_input_byte = static_cast<JOCTET*>(buffer);
 267 }
 268
 269
 270 static gboolean image_loader_jpeg_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 271 {
 272         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 273         struct jpeg_decompress_struct cinfo;
 274         struct jpeg_decompress_struct cinfo2;
 275         guchar *dptr;
 276         guchar *dptr2;
 277         guint rowstride;
 278         guchar *stereo_buf2 = nullptr;
 279         guint stereo_length = 0;
 280
 281         struct error_handler_data jerr;
 282
 283         lj->stereo = FALSE;
 284
 285         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 286         if (mpo && mpo->num_images > 1)
 287                 {
 288                 guint i;
 289                 gint idx1 = -1;
 290                 gint idx2 = -1;
 291                 guint num2 = 1;
 292
 293                 for (i = 0; i < mpo->num_images; i++)
 294                         {
 295                         if (mpo->images[i].type_code == 0x20002)
 296                                 {
 297                                 if (mpo->images[i].MPIndividualNum == 1)
 298                                         {
 299                                         idx1 = i;
 300                                         }
 301                                 else if (mpo->images[i].MPIndividualNum > num2)
 302                                         {
 303                                         idx2 = i;
 304                                         num2 = mpo->images[i].MPIndividualNum;
 305                                         }
 306                                 }
 307                         }
 308
 309                 if (idx1 >= 0 && idx2 >= 0)
 310                         {
 311                         lj->stereo = TRUE;
 312                         stereo_buf2 = const_cast<unsigned char *>(buf) + mpo->images[idx2].offset;
 313                         stereo_length = mpo->images[idx2].length;
 314                         buf = const_cast<unsigned char *>(buf) + mpo->images[idx1].offset;
 315                         count = mpo->images[idx1].length;
 316                         }
 317                 }
 318         jpeg_mpo_data_free(mpo);
 319
 320         /* setup error handler */
 321         cinfo.err = jpeg_std_error (&jerr.pub);
 322         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 323         jerr.pub.error_exit = fatal_error_handler;
 324         jerr.pub.output_message = output_message_handler;
 325
 326         jerr.error = error;
 327
 328
 329         if (sigsetjmp(jerr.setjmp_buffer, 0))
 330                 {
 331                 /* If we get here, the JPEG code has signaled an error.
 332                  * We need to clean up the JPEG object, close the input file, and return.
 333                 */
 334                 jpeg_destroy_decompress(&cinfo);
 335                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 336                 return FALSE;
 337                 }
 338
 339         jpeg_create_decompress(&cinfo);
 340
 341         set_mem_src(&cinfo, const_cast<unsigned char *>(buf), count);
 342
 343
 344         jpeg_read_header(&cinfo, TRUE);
 345
 346         if (lj->stereo)
 347                 {
 348                 jpeg_create_decompress(&cinfo2);
 349                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 350                 jpeg_read_header(&cinfo2, TRUE);
 351
 352                 if (cinfo.image_width != cinfo2.image_width ||
 353                     cinfo.image_height != cinfo2.image_height)
 354                         {
 355                         DEBUG_1("stereo data with different size");
 356                         jpeg_destroy_decompress(&cinfo2);
 357                         lj->stereo = FALSE;
 358                         }
 359                 }
 360
 361
 362
 363         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 364         lj->requested_height = cinfo.image_height;
 365         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 366
 367         cinfo.scale_num = 1;
 368         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 369                 jpeg_calc_output_dimensions(&cinfo);
 370                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 371                         cinfo.scale_denom /= 2;
 372                         break;
 373                 }
 374         }
 375         jpeg_calc_output_dimensions(&cinfo);
 376         if (lj->stereo)
 377                 {
 378                 cinfo2.scale_num = cinfo.scale_num;
 379                 cinfo2.scale_denom = cinfo.scale_denom;
 380                 jpeg_calc_output_dimensions(&cinfo2);
 381                 jpeg_start_decompress(&cinfo2);
 382                 }
 383
 384
 385         jpeg_start_decompress(&cinfo);
 386
 387
 388         if (lj->stereo)
 389                 {
 390                 if (cinfo.output_width != cinfo2.output_width ||
 391                     cinfo.output_height != cinfo2.output_height ||
 392                     cinfo.out_color_components != cinfo2.out_color_components)
 393                         {
 394                         DEBUG_1("stereo data with different output size");
 395                         jpeg_destroy_decompress(&cinfo2);
 396                         lj->stereo = FALSE;
 397                         }
 398                 }
 399
 400
 401         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 402                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 403                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 404
 405         if (!lj->pixbuf)
 406                 {
 407                 jpeg_destroy_decompress (&cinfo);
 408                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 409                 return 0;
 410                 }
 411         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 412         lj->area_prepared_cb(loader, lj->data);
 413
 414         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 415         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 416         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 417
 418
 419         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 420                 {
 421                 guint scanline = cinfo.output_scanline;
 422                 image_loader_jpeg_read_scanline(&cinfo, &dptr, rowstride);
 423                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 424                 if (lj->stereo)
 425                         {
 426                         guint scanline = cinfo2.output_scanline;
 427                         image_loader_jpeg_read_scanline(&cinfo2, &dptr2, rowstride);
 428                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 429                         }
 430                 }
 431
 432         jpeg_finish_decompress(&cinfo);
 433         jpeg_destroy_decompress(&cinfo);
 434         if (lj->stereo)
 435                 {
 436                 jpeg_finish_decompress(&cinfo);
 437                 jpeg_destroy_decompress(&cinfo);
 438                 }
 439
 440         return TRUE;
 441 }
 442
 443 static void image_loader_jpeg_set_size(gpointer loader, int width, int height)
 444 {
 445         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 446         lj->requested_width = width;
 447         lj->requested_height = height;
 448 }
 449
 450 static GdkPixbuf* image_loader_jpeg_get_pixbuf(gpointer loader)
 451 {
 452         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 453         return lj->pixbuf;
 454 }
 455
 456 static gchar* image_loader_jpeg_get_format_name(gpointer)
 457 {
 458         return g_strdup("jpeg");
 459 }
 460 static gchar** image_loader_jpeg_get_format_mime_types(gpointer)
 461 {
 462         static const gchar *mime[] = {"image/jpeg", nullptr};
 463         return g_strdupv(const_cast<gchar **>(mime));
 464 }
 465
 466 static gboolean image_loader_jpeg_close(gpointer, GError **)
 467 {
 468         return TRUE;
 469 }
 470
 471 static void image_loader_jpeg_abort(gpointer loader)
 472 {
 473         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 474         lj->abort = TRUE;
 475 }
 476
 477 static void image_loader_jpeg_free(gpointer loader)
 478 {
 479         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 480         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 481         g_free(lj);
 482 }
 483
 484
 485 void image_loader_backend_set_jpeg(ImageLoaderBackend *funcs)
 486 {
 487         funcs->loader_new = image_loader_jpeg_new;
 488         funcs->set_size = image_loader_jpeg_set_size;
 489         funcs->load = image_loader_jpeg_load;
 490         funcs->write = nullptr;
 491         funcs->get_pixbuf = image_loader_jpeg_get_pixbuf;
 492         funcs->close = image_loader_jpeg_close;
 493         funcs->abort = image_loader_jpeg_abort;
 494         funcs->free = image_loader_jpeg_free;
 495
 496         funcs->get_format_name = image_loader_jpeg_get_format_name;
 497         funcs->get_format_mime_types = image_loader_jpeg_get_format_mime_types;
 498 }
 499
 500
 501 #endif
 502
 503 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */