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