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 "image-load-cr3.h"
  28
  29 #include <config.h>
  30
  31 #include "debug.h"
  32 #include "image-load.h"
  33 #include "intl.h"
  34 #include "jpeg-parser.h"
  35 #include "typedefs.h"
  36
  37 #ifdef HAVE_JPEG
  38
  39 #include <csetjmp>
  40 #include <jerror.h>
  41 #include <jpeglib.h>
  42
  43 struct ImageLoaderJpeg {
  44         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  45         ImageLoaderBackendCbSize size_cb;
  46         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  47
  48         gpointer data;
  49
  50         GdkPixbuf *pixbuf;
  51         guint requested_width;
  52         guint requested_height;
  53
  54         gboolean abort;
  55         gboolean stereo;
  56
  57 };
  58
  59 /* error handler data */
  60 struct error_handler_data {
  61         struct jpeg_error_mgr pub;
  62         sigjmp_buf setjmp_buffer;
  63         GError **error;
  64 };
  65
  66 /* explode gray image data from jpeg library into rgb components in pixbuf */
  67 static void
  68 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  69                        guchar **lines)
  70 {
  71         gint i;
  72         gint j;
  73         guint w;
  74
  75         g_return_if_fail (cinfo != nullptr);
  76         g_return_if_fail (cinfo->output_components == 1);
  77         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  78
  79         /* Expand grey->colour.  Expand from the end of the
  80          * memory down, so we can use the same buffer.
  81          */
  82         w = cinfo->output_width;
  83         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  84                 guchar *from;
  85                 guchar *to;
  86
  87                 from = lines[i] + w - 1;
  88                 to = lines[i] + (w - 1) * 3;
  89                 for (j = w - 1; j >= 0; j--) {
  90                         to[0] = from[0];
  91                         to[1] = from[0];
  92                         to[2] = from[0];
  93                         to -= 3;
  94                         from--;
  95                 }
  96         }
  97 }
  98
  99
 100 static void
 101 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
 102                      guchar **lines)
 103 {
 104         gint i;
 105         guint j;
 106
 107         g_return_if_fail (cinfo != nullptr);
 108         g_return_if_fail (cinfo->output_components == 4);
 109         g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
 110
 111         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
 112                 guchar *p;
 113
 114                 p = lines[i];
 115                 for (j = 0; j < cinfo->output_width; j++) {
 116                         int c;
 117                         int m;
 118                         int y;
 119                         int k;
 120                         c = p[0];
 121                         m = p[1];
 122                         y = p[2];
 123                         k = p[3];
 124                         if (cinfo->saw_Adobe_marker) {
 125                                 p[0] = k*c / 255;
 126                                 p[1] = k*m / 255;
 127                                 p[2] = k*y / 255;
 128                         }
 129                         else {
 130                                 p[0] = (255 - k)*(255 - c) / 255;
 131                                 p[1] = (255 - k)*(255 - m) / 255;
 132                                 p[2] = (255 - k)*(255 - y) / 255;
 133                         }
 134                         p[3] = 255;
 135                         p += 4;
 136                 }
 137         }
 138 }
 139
 140
 141 static gpointer image_loader_cr3_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 142 {
 143         auto loader = g_new0(ImageLoaderJpeg, 1);
 144
 145         loader->area_updated_cb = area_updated_cb;
 146         loader->size_cb = size_cb;
 147         loader->area_prepared_cb = area_prepared_cb;
 148         loader->data = data;
 149         return loader;
 150 }
 151
 152 static void
 153 fatal_error_handler (j_common_ptr cinfo)
 154 {
 155         struct error_handler_data *errmgr;
 156         char buffer[JMSG_LENGTH_MAX];
 157
 158         errmgr = reinterpret_cast<struct error_handler_data *>(cinfo->err);
 159
 160         /* Create the message */
 161         (* cinfo->err->format_message) (cinfo, buffer);
 162
 163         /* broken check for *error == NULL for robustness against
 164          * crappy JPEG library
 165          */
 166         if (errmgr->error && *errmgr->error == nullptr) {
 167                 g_set_error (errmgr->error,
 168                              GDK_PIXBUF_ERROR,
 169                              cinfo->err->msg_code == JERR_OUT_OF_MEMORY
 170                              ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
 171                              : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
 172                              _("Error interpreting JPEG image file (%s)"),
 173                              buffer);
 174         }
 175
 176         siglongjmp (errmgr->setjmp_buffer, 1);
 177
 178         g_assert_not_reached ();
 179 }
 180
 181 static void
 182 output_message_handler (j_common_ptr)
 183 {
 184   /* This method keeps libjpeg from dumping crap to stderr */
 185
 186   /* do nothing */
 187 }
 188
 189
 190 static void image_loader_cr3_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
 191 {
 192         guchar *lines[4];
 193         guchar **lptr;
 194         gint i;
 195
 196         lptr = lines;
 197         for (i = 0; i < cinfo->rec_outbuf_height; i++)
 198                 {
 199                 *lptr++ = *dptr;
 200                 *dptr += rowstride;
 201                 }
 202
 203         jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
 204
 205         switch (cinfo->out_color_space)
 206                 {
 207                     case JCS_GRAYSCALE:
 208                       explode_gray_into_buf (cinfo, lines);
 209                       break;
 210                     case JCS_RGB:
 211                       /* do nothing */
 212                       break;
 213                     case JCS_CMYK:
 214                       convert_cmyk_to_rgb (cinfo, lines);
 215                       break;
 216                     default:
 217                       break;
 218                 }
 219 }
 220
 221
 222 static void init_source (j_decompress_ptr) {}
 223 static boolean fill_input_buffer (j_decompress_ptr cinfo)
 224 {
 225         ERREXIT(cinfo, JERR_INPUT_EMPTY);
 226         return TRUE;
 227 }
 228 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 229 {
 230         auto src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
 231
 232         if (static_cast<gulong>(num_bytes) > src->bytes_in_buffer)
 233                 {
 234                 ERREXIT(cinfo, JERR_INPUT_EOF);
 235                 }
 236         else if (num_bytes > 0)
 237                 {
 238                 src->next_input_byte += static_cast<size_t>(num_bytes);
 239                 src->bytes_in_buffer -= static_cast<size_t>(num_bytes);
 240                 }
 241 }
 242 static void term_source (j_decompress_ptr) {}
 243 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
 244 {
 245         struct jpeg_source_mgr* src;
 246
 247         if (cinfo->src == nullptr)
 248                 {   /* first time for this JPEG object? */
 249                 cinfo->src = static_cast<struct jpeg_source_mgr *>((*cinfo->mem->alloc_small) (
 250                                         reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT,
 251                                         sizeof(struct jpeg_source_mgr)));
 252                 }
 253
 254         src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
 255         src->init_source = init_source;
 256         src->fill_input_buffer = fill_input_buffer;
 257         src->skip_input_data = skip_input_data;
 258         src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
 259         src->term_source = term_source;
 260         src->bytes_in_buffer = nbytes;
 261         src->next_input_byte = static_cast<JOCTET*>(buffer);
 262 }
 263
 264
 265 static gboolean image_loader_cr3_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 266 {
 267         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 268         struct jpeg_decompress_struct cinfo;
 269         struct jpeg_decompress_struct cinfo2;
 270         guchar *dptr;
 271         guchar *dptr2;
 272         guint rowstride;
 273         guchar *stereo_buf2 = nullptr;
 274         guint stereo_length = 0;
 275
 276         struct error_handler_data jerr;
 277
 278 /** @FIXME Just start search at where full size jpeg should be,
 279  * / then search through the file looking for a jpeg end-marker
 280  */
 281         gboolean found = FALSE;
 282         gint i;
 283         guint n;
 284
 285         n = 0;
 286         while (n < count - 4 && !found)
 287                 {
 288                 if (memcmp(&buf[n], "mdat", 4) == 0)
 289                         {
 290                         if (memcmp(&buf[n + 12], "\xFF\xD8", 2) == 0)
 291                                 {
 292                                 i = 0;
 293                                 while (!found )
 294                                         {
 295                                         if (memcmp(&buf[n + 12 + i], "\xFF\xD9", 2) == 0)
 296                                                 {
 297                                                 found = TRUE;
 298                                                 }
 299                                         i++;
 300                                         }
 301                                 }
 302                         else
 303                                 {
 304                                 break;
 305                                 }
 306                         }
 307                 else
 308                         {
 309                         n++;
 310                         }
 311                 }
 312
 313         if (!found)
 314                 {
 315                 return FALSE;
 316                 }
 317
 318         count = i;
 319         buf = const_cast<unsigned char *>(buf) + n + 12;
 320
 321         lj->stereo = FALSE;
 322
 323         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 324         if (mpo && mpo->num_images > 1)
 325                 {
 326                 guint i;
 327                 gint idx1 = -1;
 328                 gint idx2 = -1;
 329                 guint num2 = 1;
 330
 331                 for (i = 0; i < mpo->num_images; i++)
 332                         {
 333                         if (mpo->images[i].type_code == 0x20002)
 334                                 {
 335                                 if (mpo->images[i].MPIndividualNum == 1)
 336                                         {
 337                                         idx1 = i;
 338                                         }
 339                                 else if (mpo->images[i].MPIndividualNum > num2)
 340                                         {
 341                                         idx2 = i;
 342                                         num2 = mpo->images[i].MPIndividualNum;
 343                                         }
 344                                 }
 345                         }
 346
 347                 if (idx1 >= 0 && idx2 >= 0)
 348                         {
 349                         lj->stereo = TRUE;
 350                         stereo_buf2 = const_cast<unsigned char *>(buf) + mpo->images[idx2].offset;
 351                         stereo_length = mpo->images[idx2].length;
 352                         buf = const_cast<unsigned char *>(buf) + mpo->images[idx1].offset;
 353                         count = mpo->images[idx1].length;
 354                         }
 355                 }
 356         jpeg_mpo_data_free(mpo);
 357
 358         /* setup error handler */
 359         cinfo.err = jpeg_std_error (&jerr.pub);
 360         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 361         jerr.pub.error_exit = fatal_error_handler;
 362         jerr.pub.output_message = output_message_handler;
 363
 364         jerr.error = error;
 365
 366
 367         if (sigsetjmp(jerr.setjmp_buffer, 0))
 368                 {
 369                 /* If we get here, the JPEG code has signaled an error.
 370                  * We need to clean up the JPEG object, close the input file, and return.
 371                 */
 372                 jpeg_destroy_decompress(&cinfo);
 373                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 374                 return FALSE;
 375                 }
 376
 377         jpeg_create_decompress(&cinfo);
 378
 379         set_mem_src(&cinfo, const_cast<unsigned char *>(buf), count);
 380
 381
 382         jpeg_read_header(&cinfo, TRUE);
 383
 384         if (lj->stereo)
 385                 {
 386                 jpeg_create_decompress(&cinfo2);
 387                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 388                 jpeg_read_header(&cinfo2, TRUE);
 389
 390                 if (cinfo.image_width != cinfo2.image_width ||
 391                     cinfo.image_height != cinfo2.image_height)
 392                         {
 393                         DEBUG_1("stereo data with different size");
 394                         jpeg_destroy_decompress(&cinfo2);
 395                         lj->stereo = FALSE;
 396                         }
 397                 }
 398
 399
 400
 401         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 402         lj->requested_height = cinfo.image_height;
 403         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 404
 405         cinfo.scale_num = 1;
 406         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 407                 jpeg_calc_output_dimensions(&cinfo);
 408                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 409                         cinfo.scale_denom /= 2;
 410                         break;
 411                 }
 412         }
 413         jpeg_calc_output_dimensions(&cinfo);
 414         if (lj->stereo)
 415                 {
 416                 cinfo2.scale_num = cinfo.scale_num;
 417                 cinfo2.scale_denom = cinfo.scale_denom;
 418                 jpeg_calc_output_dimensions(&cinfo2);
 419                 jpeg_start_decompress(&cinfo2);
 420                 }
 421
 422
 423         jpeg_start_decompress(&cinfo);
 424
 425
 426         if (lj->stereo)
 427                 {
 428                 if (cinfo.output_width != cinfo2.output_width ||
 429                     cinfo.output_height != cinfo2.output_height ||
 430                     cinfo.out_color_components != cinfo2.out_color_components)
 431                         {
 432                         DEBUG_1("stereo data with different output size");
 433                         jpeg_destroy_decompress(&cinfo2);
 434                         lj->stereo = FALSE;
 435                         }
 436                 }
 437
 438
 439         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 440                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 441                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 442
 443         if (!lj->pixbuf)
 444                 {
 445                 jpeg_destroy_decompress (&cinfo);
 446                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 447                 return 0;
 448                 }
 449         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 450         lj->area_prepared_cb(loader, lj->data);
 451
 452         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 453         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 454         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 455
 456
 457         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 458                 {
 459                 guint scanline = cinfo.output_scanline;
 460                 image_loader_cr3_read_scanline(&cinfo, &dptr, rowstride);
 461                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 462                 if (lj->stereo)
 463                         {
 464                         guint scanline = cinfo2.output_scanline;
 465                         image_loader_cr3_read_scanline(&cinfo2, &dptr2, rowstride);
 466                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 467                         }
 468                 }
 469
 470         jpeg_finish_decompress(&cinfo);
 471         jpeg_destroy_decompress(&cinfo);
 472         if (lj->stereo)
 473                 {
 474                 jpeg_finish_decompress(&cinfo);
 475                 jpeg_destroy_decompress(&cinfo);
 476                 }
 477
 478         return TRUE;
 479 }
 480
 481 static void image_loader_cr3_set_size(gpointer loader, int width, int height)
 482 {
 483         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 484         lj->requested_width = width;
 485         lj->requested_height = height;
 486 }
 487
 488 static GdkPixbuf* image_loader_cr3_get_pixbuf(gpointer loader)
 489 {
 490         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 491         return lj->pixbuf;
 492 }
 493
 494 static gchar* image_loader_cr3_get_format_name(gpointer)
 495 {
 496         return g_strdup("cr3");
 497 }
 498 static gchar** image_loader_cr3_get_format_mime_types(gpointer)
 499 {
 500         static const gchar *mime[] = {"image/x-canon-cr3", nullptr};
 501         return g_strdupv(const_cast<gchar **>(mime));
 502 }
 503
 504 static gboolean image_loader_cr3_close(gpointer, GError **)
 505 {
 506         return TRUE;
 507 }
 508
 509 static void image_loader_cr3_abort(gpointer loader)
 510 {
 511         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 512         lj->abort = TRUE;
 513 }
 514
 515 static void image_loader_cr3_free(gpointer loader)
 516 {
 517         auto lj = static_cast<ImageLoaderJpeg *>(loader);
 518         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 519         g_free(lj);
 520 }
 521
 522
 523 void image_loader_backend_set_cr3(ImageLoaderBackend *funcs)
 524 {
 525         funcs->loader_new = image_loader_cr3_new;
 526         funcs->set_size = image_loader_cr3_set_size;
 527         funcs->load = image_loader_cr3_load;
 528         funcs->write = nullptr;
 529         funcs->get_pixbuf = image_loader_cr3_get_pixbuf;
 530         funcs->close = image_loader_cr3_close;
 531         funcs->abort = image_loader_cr3_abort;
 532         funcs->free = image_loader_cr3_free;
 533
 534         funcs->get_format_name = image_loader_cr3_get_format_name;
 535         funcs->get_format_mime_types = image_loader_cr3_get_format_mime_types;
 536 }
 537
 538
 539
 540 #endif
 541
 542
 543 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */