src/image_load_cr3.c

   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 /** @FIXME This is just a copy of image_load_jpeg.c, with an adjusted
  22  * start address for a .cr3 file
  23  */
  24 #include "main.h"
  25
  26 #include "image-load.h"
  27 #include "image_load_cr3.h"
  28 #include "jpeg_parser.h"
  29
  30 #ifdef HAVE_JPEG
  31
  32 #include <setjmp.h>
  33 #include <jpeglib.h>
  34 #include <jerror.h>
  35
  36 typedef struct _ImageLoaderJpeg ImageLoaderJpeg;
  37 struct _ImageLoaderJpeg {
  38         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  39         ImageLoaderBackendCbSize size_cb;
  40         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  41
  42         gpointer data;
  43
  44         GdkPixbuf *pixbuf;
  45         guint requested_width;
  46         guint requested_height;
  47
  48         gboolean abort;
  49         gboolean stereo;
  50
  51 };
  52
  53 /* error handler data */
  54 struct error_handler_data {
  55         struct jpeg_error_mgr pub;
  56         sigjmp_buf setjmp_buffer;
  57         GError **error;
  58 };
  59
  60 /* explode gray image data from jpeg library into rgb components in pixbuf */
  61 static void
  62 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
  63                        guchar **lines)
  64 {
  65         gint i, j;
  66         guint w;
  67
  68         g_return_if_fail (cinfo != NULL);
  69         g_return_if_fail (cinfo->output_components == 1);
  70         g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
  71
  72         /* Expand grey->colour.  Expand from the end of the
  73          * memory down, so we can use the same buffer.
  74          */
  75         w = cinfo->output_width;
  76         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
  77                 guchar *from, *to;
  78
  79                 from = lines[i] + w - 1;
  80                 to = lines[i] + (w - 1) * 3;
  81                 for (j = w - 1; j >= 0; j--) {
  82                         to[0] = from[0];
  83                         to[1] = from[0];
  84                         to[2] = from[0];
  85                         to -= 3;
  86                         from--;
  87                 }
  88         }
  89 }
  90
  91
  92 static void
  93 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
  94                      guchar **lines)
  95 {
  96         gint i, j;
  97
  98         g_return_if_fail (cinfo != NULL);
  99         g_return_if_fail (cinfo->output_components == 4);
 100         g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
 101
 102         for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
 103                 guchar *p;
 104
 105                 p = lines[i];
 106                 for (j = 0; j < cinfo->output_width; j++) {
 107                         int c, m, y, k;
 108                         c = p[0];
 109                         m = p[1];
 110                         y = p[2];
 111                         k = p[3];
 112                         if (cinfo->saw_Adobe_marker) {
 113                                 p[0] = k*c / 255;
 114                                 p[1] = k*m / 255;
 115                                 p[2] = k*y / 255;
 116                         }
 117                         else {
 118                                 p[0] = (255 - k)*(255 - c) / 255;
 119                                 p[1] = (255 - k)*(255 - m) / 255;
 120                                 p[2] = (255 - k)*(255 - y) / 255;
 121                         }
 122                         p[3] = 255;
 123                         p += 4;
 124                 }
 125         }
 126 }
 127
 128
 129 static gpointer image_loader_cr3_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 130 {
 131         ImageLoaderJpeg *loader = g_new0(ImageLoaderJpeg, 1);
 132
 133         loader->area_updated_cb = area_updated_cb;
 134         loader->size_cb = size_cb;
 135         loader->area_prepared_cb = area_prepared_cb;
 136         loader->data = data;
 137         return (gpointer) loader;
 138 }
 139
 140 static void
 141 fatal_error_handler (j_common_ptr cinfo)
 142 {
 143         struct error_handler_data *errmgr;
 144         char buffer[JMSG_LENGTH_MAX];
 145
 146         errmgr = (struct error_handler_data *) cinfo->err;
 147
 148         /* Create the message */
 149         (* cinfo->err->format_message) (cinfo, buffer);
 150
 151         /* broken check for *error == NULL for robustness against
 152          * crappy JPEG library
 153          */
 154         if (errmgr->error && *errmgr->error == NULL) {
 155                 g_set_error (errmgr->error,
 156                              GDK_PIXBUF_ERROR,
 157                              cinfo->err->msg_code == JERR_OUT_OF_MEMORY
 158                              ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
 159                              : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
 160                              _("Error interpreting JPEG image file (%s)"),
 161                              buffer);
 162         }
 163
 164         siglongjmp (errmgr->setjmp_buffer, 1);
 165
 166         g_assert_not_reached ();
 167 }
 168
 169 static void
 170 output_message_handler (j_common_ptr cinfo)
 171 {
 172   /* This method keeps libjpeg from dumping crap to stderr */
 173
 174   /* do nothing */
 175 }
 176
 177
 178 static void image_loader_cr3_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
 179 {
 180         guchar *lines[4];
 181         guchar **lptr;
 182         gint i;
 183
 184         lptr = lines;
 185         for (i = 0; i < cinfo->rec_outbuf_height; i++)
 186                 {
 187                 *lptr++ = *dptr;
 188                 *dptr += rowstride;
 189                 }
 190
 191         jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
 192
 193         switch (cinfo->out_color_space)
 194                 {
 195                     case JCS_GRAYSCALE:
 196                       explode_gray_into_buf (cinfo, lines);
 197                       break;
 198                     case JCS_RGB:
 199                       /* do nothing */
 200                       break;
 201                     case JCS_CMYK:
 202                       convert_cmyk_to_rgb (cinfo, lines);
 203                       break;
 204                     default:
 205                       break;
 206                 }
 207 }
 208
 209
 210 static void init_source (j_decompress_ptr cinfo) {}
 211 static boolean fill_input_buffer (j_decompress_ptr cinfo)
 212 {
 213         ERREXIT(cinfo, JERR_INPUT_EMPTY);
 214         return TRUE;
 215 }
 216 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 217 {
 218         struct jpeg_source_mgr* src = (struct jpeg_source_mgr*) cinfo->src;
 219
 220         if (num_bytes > src->bytes_in_buffer)
 221                 {
 222                 ERREXIT(cinfo, JERR_INPUT_EOF);
 223                 }
 224         else if (num_bytes > 0)
 225                 {
 226                 src->next_input_byte += (size_t) num_bytes;
 227                 src->bytes_in_buffer -= (size_t) num_bytes;
 228                 }
 229 }
 230 static void term_source (j_decompress_ptr cinfo) {}
 231 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
 232 {
 233         struct jpeg_source_mgr* src;
 234
 235         if (cinfo->src == NULL)
 236                 {   /* first time for this JPEG object? */
 237                 cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) (
 238                                         (j_common_ptr) cinfo, JPOOL_PERMANENT,
 239                                         sizeof(struct jpeg_source_mgr));
 240                 }
 241
 242         src = (struct jpeg_source_mgr*) cinfo->src;
 243         src->init_source = init_source;
 244         src->fill_input_buffer = fill_input_buffer;
 245         src->skip_input_data = skip_input_data;
 246         src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
 247         src->term_source = term_source;
 248         src->bytes_in_buffer = nbytes;
 249         src->next_input_byte = (JOCTET*)buffer;
 250 }
 251
 252
 253 static gboolean image_loader_cr3_load (gpointer loader, const guchar *buf, gsize count, GError **error)
 254 {
 255         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 256         struct jpeg_decompress_struct cinfo;
 257         struct jpeg_decompress_struct cinfo2;
 258         guchar *dptr, *dptr2;
 259         guint rowstride;
 260         guchar *stereo_buf2 = NULL;
 261         guint stereo_length = 0;
 262
 263         struct error_handler_data jerr;
 264
 265 /** @FIXME Just start search at where full size jpeg should be,
 266  * / then search through the file looking for a jpeg end-marker
 267  */
 268         gboolean found = FALSE;
 269         gint i;
 270         gint n;
 271
 272         n = 0;
 273         while (n < count - 4 && !found)
 274                 {
 275                 if (memcmp(&buf[n], "mdat", 4) == 0)
 276                         {
 277                         if (memcmp(&buf[n + 12], "\xFF\xD8", 2) == 0)
 278                                 {
 279                                 i = 0;
 280                                 while (!found )
 281                                         {
 282                                         if (memcmp(&buf[n + 12 + i], "\xFF\xD9", 2) == 0)
 283                                                 {
 284                                                 found = TRUE;
 285                                                 }
 286                                         i++;
 287                                         }
 288                                 }
 289                         else
 290                                 {
 291                                 break;
 292                                 }
 293                         }
 294                 else
 295                         {
 296                         n++;
 297                         }
 298                 }
 299
 300         if (!found)
 301                 {
 302                 return FALSE;
 303                 }
 304
 305         count = i;
 306         buf = (unsigned char *)buf + n + 12;
 307
 308         lj->stereo = FALSE;
 309
 310         MPOData *mpo = jpeg_get_mpo_data(buf, count);
 311         if (mpo && mpo->num_images > 1)
 312                 {
 313                 guint i;
 314                 gint idx1 = -1, idx2 = -1;
 315                 guint num2 = 1;
 316
 317                 for (i = 0; i < mpo->num_images; i++)
 318                         {
 319                         if (mpo->images[i].type_code == 0x20002)
 320                                 {
 321                                 if (mpo->images[i].MPIndividualNum == 1)
 322                                         {
 323                                         idx1 = i;
 324                                         }
 325                                 else if (mpo->images[i].MPIndividualNum > num2)
 326                                         {
 327                                         idx2 = i;
 328                                         num2 = mpo->images[i].MPIndividualNum;
 329                                         }
 330                                 }
 331                         }
 332
 333                 if (idx1 >= 0 && idx2 >= 0)
 334                         {
 335                         lj->stereo = TRUE;
 336                         stereo_buf2 = (unsigned char *)buf + mpo->images[idx2].offset;
 337                         stereo_length = mpo->images[idx2].length;
 338                         buf = (unsigned char *)buf + mpo->images[idx1].offset;
 339                         count = mpo->images[idx1].length;
 340                         }
 341                 }
 342         jpeg_mpo_data_free(mpo);
 343
 344         /* setup error handler */
 345         cinfo.err = jpeg_std_error (&jerr.pub);
 346         if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
 347         jerr.pub.error_exit = fatal_error_handler;
 348         jerr.pub.output_message = output_message_handler;
 349
 350         jerr.error = error;
 351
 352
 353         if (setjmp(jerr.setjmp_buffer))
 354                 {
 355                 /* If we get here, the JPEG code has signaled an error.
 356                  * We need to clean up the JPEG object, close the input file, and return.
 357                 */
 358                 jpeg_destroy_decompress(&cinfo);
 359                 if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
 360                 return FALSE;
 361                 }
 362
 363         jpeg_create_decompress(&cinfo);
 364
 365         set_mem_src(&cinfo, (unsigned char *)buf, count);
 366
 367
 368         jpeg_read_header(&cinfo, TRUE);
 369
 370         if (lj->stereo)
 371                 {
 372                 jpeg_create_decompress(&cinfo2);
 373                 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
 374                 jpeg_read_header(&cinfo2, TRUE);
 375
 376                 if (cinfo.image_width != cinfo2.image_width ||
 377                     cinfo.image_height != cinfo2.image_height)
 378                         {
 379                         DEBUG_1("stereo data with different size");
 380                         jpeg_destroy_decompress(&cinfo2);
 381                         lj->stereo = FALSE;
 382                         }
 383                 }
 384
 385
 386
 387         lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
 388         lj->requested_height = cinfo.image_height;
 389         lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
 390
 391         cinfo.scale_num = 1;
 392         for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
 393                 jpeg_calc_output_dimensions(&cinfo);
 394                 if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
 395                         cinfo.scale_denom /= 2;
 396                         break;
 397                 }
 398         }
 399         jpeg_calc_output_dimensions(&cinfo);
 400         if (lj->stereo)
 401                 {
 402                 cinfo2.scale_num = cinfo.scale_num;
 403                 cinfo2.scale_denom = cinfo.scale_denom;
 404                 jpeg_calc_output_dimensions(&cinfo2);
 405                 jpeg_start_decompress(&cinfo2);
 406                 }
 407
 408
 409         jpeg_start_decompress(&cinfo);
 410
 411
 412         if (lj->stereo)
 413                 {
 414                 if (cinfo.output_width != cinfo2.output_width ||
 415                     cinfo.output_height != cinfo2.output_height ||
 416                     cinfo.out_color_components != cinfo2.out_color_components)
 417                         {
 418                         DEBUG_1("stereo data with different output size");
 419                         jpeg_destroy_decompress(&cinfo2);
 420                         lj->stereo = FALSE;
 421                         }
 422                 }
 423
 424
 425         lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
 426                                      cinfo.out_color_components == 4 ? TRUE : FALSE,
 427                                      8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
 428
 429         if (!lj->pixbuf)
 430                 {
 431                 jpeg_destroy_decompress (&cinfo);
 432                 if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
 433                 return 0;
 434                 }
 435         if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
 436         lj->area_prepared_cb(loader, lj->data);
 437
 438         rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
 439         dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
 440         dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
 441
 442
 443         while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
 444                 {
 445                 guint scanline = cinfo.output_scanline;
 446                 image_loader_cr3_read_scanline(&cinfo, &dptr, rowstride);
 447                 lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
 448                 if (lj->stereo)
 449                         {
 450                         guint scanline = cinfo2.output_scanline;
 451                         image_loader_cr3_read_scanline(&cinfo2, &dptr2, rowstride);
 452                         lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
 453                         }
 454                 }
 455
 456         jpeg_finish_decompress(&cinfo);
 457         jpeg_destroy_decompress(&cinfo);
 458         if (lj->stereo)
 459                 {
 460                 jpeg_finish_decompress(&cinfo);
 461                 jpeg_destroy_decompress(&cinfo);
 462                 }
 463
 464         return TRUE;
 465 }
 466
 467 static void image_loader_cr3_set_size(gpointer loader, int width, int height)
 468 {
 469         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 470         lj->requested_width = width;
 471         lj->requested_height = height;
 472 }
 473
 474 static GdkPixbuf* image_loader_cr3_get_pixbuf(gpointer loader)
 475 {
 476         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 477         return lj->pixbuf;
 478 }
 479
 480 static gchar* image_loader_cr3_get_format_name(gpointer loader)
 481 {
 482         return g_strdup("cr3");
 483 }
 484 static gchar** image_loader_cr3_get_format_mime_types(gpointer loader)
 485 {
 486         static gchar *mime[] = {"image/x-canon-cr3", NULL};
 487         return g_strdupv(mime);
 488 }
 489
 490 static gboolean image_loader_cr3_close(gpointer loader, GError **error)
 491 {
 492         return TRUE;
 493 }
 494
 495 static void image_loader_cr3_abort(gpointer loader)
 496 {
 497         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 498         lj->abort = TRUE;
 499 }
 500
 501 static void image_loader_cr3_free(gpointer loader)
 502 {
 503         ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
 504         if (lj->pixbuf) g_object_unref(lj->pixbuf);
 505         g_free(lj);
 506 }
 507
 508
 509 void image_loader_backend_set_cr3(ImageLoaderBackend *funcs)
 510 {
 511         funcs->loader_new = image_loader_cr3_new;
 512         funcs->set_size = image_loader_cr3_set_size;
 513         funcs->load = image_loader_cr3_load;
 514         funcs->write = NULL;
 515         funcs->get_pixbuf = image_loader_cr3_get_pixbuf;
 516         funcs->close = image_loader_cr3_close;
 517         funcs->abort = image_loader_cr3_abort;
 518         funcs->free = image_loader_cr3_free;
 519
 520         funcs->get_format_name = image_loader_cr3_get_format_name;
 521         funcs->get_format_mime_types = image_loader_cr3_get_format_mime_types;
 522 }
 523
 524
 525
 526 #endif
 527
 528
 529 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */