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