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 #include <config.h>
  25
  26 #if HAVE_JPEG && !HAVE_RAW
  27 #include "image-load-cr3.h"
  28
  29 #include <cstring>
  30
  31 #include <glib.h>
  32
  33 #include "image-load-jpeg.h"
  34 #include "image-load.h"
  35
  36 namespace
  37 {
  38
  39 gboolean image_loader_cr3_load(gpointer loader, const guchar *buf, gsize count, GError **error)
  40 {
  41         /** @FIXME Just start search at where full size jpeg should be,
  42          * then search through the file looking for a jpeg end-marker
  43          */
  44         gboolean found = FALSE;
  45         gint i;
  46         guint n;
  47
  48         n = 0;
  49         while (n < count - 4 && !found)
  50                 {
  51                 if (memcmp(&buf[n], "mdat", 4) == 0)
  52                         {
  53                         if (memcmp(&buf[n + 12], "\xFF\xD8", 2) == 0)
  54                                 {
  55                                 i = 0;
  56                                 while (!found )
  57                                         {
  58                                         if (memcmp(&buf[n + 12 + i], "\xFF\xD9", 2) == 0)
  59                                                 {
  60                                                 found = TRUE;
  61                                                 }
  62                                         i++;
  63                                         }
  64                                 }
  65                         else
  66                                 {
  67                                 break;
  68                                 }
  69                         }
  70                 else
  71                         {
  72                         n++;
  73                         }
  74                 }
  75
  76         if (!found)
  77                 {
  78                 return FALSE;
  79                 }
  80
  81         return image_loader_jpeg_load(loader, buf + n + 12, i, error);
  82 }
  83
  84 gchar* image_loader_cr3_get_format_name(gpointer)
  85 {
  86         return g_strdup("cr3");
  87 }
  88
  89 gchar** image_loader_cr3_get_format_mime_types(gpointer)
  90 {
  91         static const gchar *mime[] = {"image/x-canon-cr3", nullptr};
  92         return g_strdupv(const_cast<gchar **>(mime));
  93 }
  94
  95 } // namespace
  96
  97 void image_loader_backend_set_cr3(ImageLoaderBackend *funcs)
  98 {
  99         image_loader_backend_set_jpeg(funcs);
 100
 101         funcs->load = image_loader_cr3_load;
 102
 103         funcs->get_format_name = image_loader_cr3_get_format_name;
 104         funcs->get_format_mime_types = image_loader_cr3_get_format_mime_types;
 105 }
 106
 107 #endif // HAVE_JPEG && !HAVE_RAW
 108
 109 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */