src/image-load-cr3.cc

   1 /*
   2  * Copyright (C) 2020 The Geeqie Team
   3  *
   4  * Authors: Colin Clark
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 /** This is a Will Not Fix */
  22 #pragma GCC diagnostic ignored "-Wclobbered"
  23
  24 /** @FIXME This is just a copy of image-load-jpeg.cc, with an adjusted
  25  * start address for a .cr3 file
  26  */
  27 #include "main.h"
  28
  29 #include "image-load.h"
  30 #include "image-load-cr3.h"
  31 #include "jpeg-parser.h"
  32
  33 #ifdef HAVE_JPEG
  34
  35 #include <csetjmp>
  36 #include <jerror.h>
  37 #include <jpeglib.h>
  38
  39 struct ImageLoaderJpeg {
  40         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  41         ImageLoaderBackendCbSize size_cb;
  42         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  43
  44         gpointer data;
  45
  46         GdkPixbuf *pixbuf;
  47         guint requested_width;
  48         guint requested_height;
  49
  50         gboolean abort;
  51         gboolean stereo;
  52
  53 };
  54
  55 /* error handler data */
  56 struct error_handler_data {
  57         struct jpeg_error_mgr pub;
  58         sigjmp_buf setjmp_buffer;
  59         GError **error;
  60 };
  61
  62 /* explode gray image data from jpeg library into rgb components in pixbuf */
  63 static void
  64 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  65                        guchar **lines)
  66 {
  67         gint i, j;
  68         guint w;
  69
  70         g_return_if_fail (cinfo != nullptr);
  71         g_return_if_fail (cinfo->output_components == 1);
  72         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  73
  74         /* Expand grey->colour.  Expand from the end of the
  75          * memory down, so we can use the same buffer.
  76          */
  77         w = cinfo->output_width;
  78         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  79                 guchar *from, *to;
  80
  81                 from = lines[i] + w - 1;
  82                 to = lines[i] + (w - 1) * 3;
  83                 for (j = w - 1; j >= 0; j--) {
  84                         to[0] = from[0];
  85                         to[1] = from[0];
  86                         to[2] = from[0];
  87                         to -= 3;
  88                         from--;
  89                 }
  90         }
  91 }
  92
  93
  94 static void
  95 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
  96                      guchar **lines)
  97 {
  98         gint i;
  99         guint j;
 100
 101         g_return_if_fail (cinfo != nullptr);
 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_cr3_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 133 {
 134         auto 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 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 = reinterpret_cast<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 == nullptr) {
 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)
 174 {
 175   /* This method keeps libjpeg from dumping crap to stderr */
 176
 177   /* do nothing */
 178 }
 179
 180
 181 static void image_loader_cr3_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) {}
 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         auto src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
 222
 223         if (static_cast<gulong>(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 += static_cast<size_t>(num_bytes);
 230                 src->bytes_in_buffer -= static_cast<size_t>(num_bytes);
 231                 }
 232 }
 233 static void term_source (j_decompress_ptr) {}
 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 == nullptr)
 239                 {   /* first time for this JPEG object? */
 240                 cinfo->src = static_cast<struct jpeg_source_mgr *>((*cinfo->mem->alloc_small) (
 241                                         reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT,
 242                                         sizeof(struct jpeg_source_mgr)));
 243                 }
 244
 245         src = static_cast<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 = static_cast<JOCTET*>(buffer);
 253 }
 254
 255
 256 static gboolean image_loader_cr3_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 257 {
 258         auto lj = static_cast<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 = nullptr;
 264         guint stereo_length = 0;
 265
 266         struct error_handler_data jerr;
 267
 268 /** @FIXME Just start search at where full size jpeg should be,
 269  * / then search through the file looking for a jpeg end-marker
 270  */
 271         gboolean found = FALSE;
 272         gint i;
 273         guint n;
 274
 275         n = 0;
 276         while (n < count - 4 && !found)
 277                 {
 278                 if (memcmp(&buf[n], "mdat", 4) == 0)
 279                         {
 280                         if (memcmp(&buf[n + 12], "\xFF\xD8", 2) == 0)
 281                                 {
 282                                 i = 0;
 283                                 while (!found )
 284                                         {
 285                                         if (memcmp(&buf[n + 12 + i], "\xFF\xD9", 2) == 0)
 286                                                 {
 287                                                 found = TRUE;
 288                                                 }
 289                                         i++;
 290                                         }
 291                                 }
 292                         else
 293                                 {
 294                                 break;
 295                                 }
 296                         }
 297                 else
 298                         {
 299                         n++;
 300                         }
 301                 }
 302
 303         if (!found)
 304                 {
 305                 return FALSE;
 306                 }
 307
 308         count = i;
 309         buf = const_cast<unsigned char *>(buf) + n + 12;
 310
 311         lj->stereo = FALSE;
 312
 313         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 314         if (mpo && mpo->num_images > 1)
 315                 {
 316                 guint i;
 317                 gint idx1 = -1, idx2 = -1;
 318                 guint num2 = 1;
 319
 320                 for (i = 0; i < mpo->num_images; i++)
 321                         {
 322                         if (mpo->images[i].type_code == 0x20002)
 323                                 {
 324                                 if (mpo->images[i].MPIndividualNum == 1)
 325                                         {
 326                                         idx1 = i;
 327                                         }
 328                                 else if (mpo->images[i].MPIndividualNum > num2)
 329                                         {
 330                                         idx2 = i;
 331                                         num2 = mpo->images[i].MPIndividualNum;
 332                                         }
 333                                 }
 334                         }
 335
 336                 if (idx1 >= 0 && idx2 >= 0)
 337                         {
 338                         lj->stereo = TRUE;
 339                         stereo_buf2 = const_cast<unsigned char *>(buf) + mpo->images[idx2].offset;
 340                         stereo_length = mpo->images[idx2].length;
 341                         buf = const_cast<unsigned char *>(buf) + mpo->images[idx1].offset;
 342                         count = mpo->images[idx1].length;
 343                         }
 344                 }
 345         jpeg_mpo_data_free(mpo);
 346
 347         /* setup error handler */
 348         cinfo.err = jpeg_std_error (&jerr.pub);
 349         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 350         jerr.pub.error_exit = fatal_error_handler;
 351         jerr.pub.output_message = output_message_handler;
 352
 353         jerr.error = error;
 354
 355
 356         if (sigsetjmp(jerr.setjmp_buffer, 0))
 357                 {
 358                 /* If we get here, the JPEG code has signaled an error.
 359                  * We need to clean up the JPEG object, close the input file, and return.
 360                 */
 361                 jpeg_destroy_decompress(&cinfo);
 362                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 363                 return FALSE;
 364                 }
 365
 366         jpeg_create_decompress(&cinfo);
 367
 368         set_mem_src(&cinfo, const_cast<unsigned char *>(buf), count);
 369
 370
 371         jpeg_read_header(&cinfo, TRUE);
 372
 373         if (lj->stereo)
 374                 {
 375                 jpeg_create_decompress(&cinfo2);
 376                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 377                 jpeg_read_header(&cinfo2, TRUE);
 378
 379                 if (cinfo.image_width != cinfo2.image_width ||
 380                     cinfo.image_height != cinfo2.image_height)
 381                         {
 382                         DEBUG_1("stereo data with different size");
 383                         jpeg_destroy_decompress(&cinfo2);
 384                         lj->stereo = FALSE;
 385                         }
 386                 }
 387
 388
 389
 390         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 391         lj->requested_height = cinfo.image_height;
 392         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 393
 394         cinfo.scale_num = 1;
 395         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 396                 jpeg_calc_output_dimensions(&cinfo);
 397                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 398                         cinfo.scale_denom /= 2;
 399                         break;
 400                 }
 401         }
 402         jpeg_calc_output_dimensions(&cinfo);
 403         if (lj->stereo)
 404                 {
 405                 cinfo2.scale_num = cinfo.scale_num;
 406                 cinfo2.scale_denom = cinfo.scale_denom;
 407                 jpeg_calc_output_dimensions(&cinfo2);
 408                 jpeg_start_decompress(&cinfo2);
 409                 }
 410
 411
 412         jpeg_start_decompress(&cinfo);
 413
 414
 415         if (lj->stereo)
 416                 {
 417                 if (cinfo.output_width != cinfo2.output_width ||
 418                     cinfo.output_height != cinfo2.output_height ||
 419                     cinfo.out_color_components != cinfo2.out_color_components)
 420                         {
 421                         DEBUG_1("stereo data with different output size");
 422                         jpeg_destroy_decompress(&cinfo2);
 423                         lj->stereo = FALSE;
 424                         }
 425                 }
 426
 427
 428         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 429                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 430                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 431
 432         if (!lj->pixbuf)
 433                 {
 434                 jpeg_destroy_decompress (&cinfo);
 435                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 436                 return 0;
 437                 }
 438         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 439         lj->area_prepared_cb(loader, lj->data);
 440
 441         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 442         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 443         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 444
 445
 446         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 447                 {
 448                 guint scanline = cinfo.output_scanline;
 449                 image_loader_cr3_read_scanline(&cinfo, &dptr, rowstride);
 450                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 451                 if (lj->stereo)
 452                         {
 453                         guint scanline = cinfo2.output_scanline;
 454                         image_loader_cr3_read_scanline(&cinfo2, &dptr2, rowstride);
 455                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 456                         }
 457                 }
 458
 459         jpeg_finish_decompress(&cinfo);
 460         jpeg_destroy_decompress(&cinfo);
 461         if (lj->stereo)
 462                 {
 463                 jpeg_finish_decompress(&cinfo);
 464                 jpeg_destroy_decompress(&cinfo);
 465                 }
 466
 467         return TRUE;
 468 }
 469
 470 static void image_loader_cr3_set_size(gpointer loader, int width, int height)
 471 {
 472         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 473         lj->requested_width = width;
 474         lj->requested_height = height;
 475 }
 476
 477 static GdkPixbuf* image_loader_cr3_get_pixbuf(gpointer loader)
 478 {
 479         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 480         return lj->pixbuf;
 481 }
 482
 483 static gchar* image_loader_cr3_get_format_name(gpointer)
 484 {
 485         return g_strdup("cr3");
 486 }
 487 static gchar** image_loader_cr3_get_format_mime_types(gpointer)
 488 {
 489         static const gchar *mime[] = {"image/x-canon-cr3", nullptr};
 490         return g_strdupv(const_cast<gchar **>(mime));
 491 }
 492
 493 static gboolean image_loader_cr3_close(gpointer, GError **)
 494 {
 495         return TRUE;
 496 }
 497
 498 static void image_loader_cr3_abort(gpointer loader)
 499 {
 500         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 501         lj->abort = TRUE;
 502 }
 503
 504 static void image_loader_cr3_free(gpointer loader)
 505 {
 506         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 507         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 508         g_free(lj);
 509 }
 510
 511
 512 void image_loader_backend_set_cr3(ImageLoaderBackend *funcs)
 513 {
 514         funcs->loader_new = image_loader_cr3_new;
 515         funcs->set_size = image_loader_cr3_set_size;
 516         funcs->load = image_loader_cr3_load;
 517         funcs->write = nullptr;
 518         funcs->get_pixbuf = image_loader_cr3_get_pixbuf;
 519         funcs->close = image_loader_cr3_close;
 520         funcs->abort = image_loader_cr3_abort;
 521         funcs->free = image_loader_cr3_free;
 522
 523         funcs->get_format_name = image_loader_cr3_get_format_name;
 524         funcs->get_format_mime_types = image_loader_cr3_get_format_mime_types;
 525 }
 526
 527
 528
 529 #endif
 530
 531
 532 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */