Mercurial > octave-libtiff

diff libinterp/corefcn/__tiff__.cc @ 31202:be6ccdcd5775

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Tiff: added isBigEndian and getDirectoryOffset methods to the class * scripts/io/Tiff.m: added isBigEndian and getDirectoryOffset methods to the class. * libtinterp/corefcn/tiff.cc: added __tiff_is_big_endian__ and __tiff_get_directory_offset__ as internal functions for isBigEndian and getDirectoryOffset repectively. * scripts/image/private/__tiff_imfinfo__.m: used the two new methods to get the corresponding info fields.
author magedrifaat <magedrifaat@gmail.com>
date Fri, 02 Sep 2022 21:20:56 +0200
parents e5e8cb049b4b
children fa50e2c17568
line wrap: on
line diff
--- a/libinterp/corefcn/__tiff__.cc	Fri Sep 02 20:52:47 2022 +0200
+++ b/libinterp/corefcn/__tiff__.cc	Fri Sep 02 21:20:56 2022 +0200
@@ -3348,6 +3348,31 @@
 #endif
   }
 
+  DEFUN (__tiff_is_big_endian__, args, ,
+         "Get the whether the tiff file is big-endian")
+  {
+#if defined (HAVE_TIFF)
+    int nargin = args.length ();
+
+    if (nargin != 1)
+      error ("Wrong number of arguments\n");
+    
+    octave_tiff_handle *tiff_handle
+      = octave_tiff_handle::get_tiff_handle (args(0));
+    check_closed (tiff_handle);
+
+    set_internal_handlers ();
+
+    TIFF *tif = tiff_handle->get_file ();
+
+    bool is_big_endian = TIFFIsBigEndian (tif);
+    
+    return ovl (is_big_endian);
+#else
+    err_disabled_feature ("isBigEndian", "Tiff");
+#endif
+  }
+
   DEFUN (__tiff_current_directory__, args, ,
          "Get the index of the current directory")
   {
@@ -3559,6 +3584,31 @@
 #endif
   }
 
+  DEFUN (__tiff_get_directory_offset__, args, ,
+         "Get the offset of the current directory in file")
+  {
+#if defined (HAVE_TIFF)
+    int nargin = args.length ();
+
+    if (nargin != 1)
+      error ("Wrong number of arguments\n");
+    
+    octave_tiff_handle *tiff_handle
+      = octave_tiff_handle::get_tiff_handle (args(0));
+    check_closed (tiff_handle);
+    
+    set_internal_handlers ();
+    
+    TIFF *tif = tiff_handle->get_file ();
+    
+    uint64_t offset = TIFFCurrentDirOffset (tif);
+
+    return ovl (offset);
+#else
+    err_disabled_feature ("getDirectoryOffset", "Tiff");
+#endif
+  }
+
   DEFUN (__tiff_version__, , ,
              "Get the version stamp of LibTIFF")
   {