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