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 struct ImageLoaderCr3 : public ImageLoaderJpeg
  40 {
  41 public:
  42         gboolean write(const guchar *buf, gsize &chunk_size, gsize count, GError **error) override;
  43         gchar *get_format_name() override;
  44         gchar **get_format_mime_types() override;
  45 };
  46
  47 gboolean ImageLoaderCr3::write(const guchar *buf, gsize &chunk_size, gsize count, GError **error)
  48 {
  49         /** @FIXME Just start search at where full size jpeg should be,
  50          * then search through the file looking for a jpeg end-marker
  51          */
  52         gboolean found = FALSE;
  53         gint i;
  54         guint n;
  55
  56         n = 0;
  57         while (n < count - 4 && !found)
  58                 {
  59                 if (memcmp(&buf[n], "mdat", 4) == 0)
  60                         {
  61                         if (memcmp(&buf[n + 12], "\xFF\xD8", 2) == 0)
  62                                 {
  63                                 i = 0;
  64                                 while (!found )
  65                                         {
  66                                         if (memcmp(&buf[n + 12 + i], "\xFF\xD9", 2) == 0)
  67                                                 {
  68                                                 found = TRUE;
  69                                                 }
  70                                         i++;
  71                                         }
  72                                 }
  73                         else
  74                                 {
  75                                 break;
  76                                 }
  77                         }
  78                 else
  79                         {
  80                         n++;
  81                         }
  82                 }
  83
  84         if (!found)
  85                 {
  86                 return FALSE;
  87                 }
  88
  89         gboolean ret = ImageLoaderJpeg::write(buf + n + 12, chunk_size, i, error);
  90         if (ret)
  91                 {
  92                 chunk_size = count;
  93                 }
  94         return ret;
  95 }
  96
  97 gchar *ImageLoaderCr3::get_format_name()
  98 {
  99         return g_strdup("cr3");
 100 }
 101
 102 gchar **ImageLoaderCr3::get_format_mime_types()
 103 {
 104         static const gchar *mime[] = {"image/x-canon-cr3", nullptr};
 105         return g_strdupv(const_cast<gchar **>(mime));
 106 }
 107
 108 } // namespace
 109
 110 std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_cr3()
 111 {
 112         return std::make_unique<ImageLoaderCr3>();
 113 }
 114
 115 #endif // HAVE_JPEG && !HAVE_RAW
 116
 117 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */