# HG changeset patch
# User magedrifaat <magedrifaat@gmail.com>
# Date 1662146456 -7200
# Node ID be6ccdcd5775782452663aa89c8635d9f919bf5b
# Parent  e5e8cb049b4b3ea62e8e42ffc38adcea987b8836
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.

diff -r e5e8cb049b4b -r be6ccdcd5775 libinterp/corefcn/__tiff__.cc
--- 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")
   {
diff -r e5e8cb049b4b -r be6ccdcd5775 scripts/image/private/__tiff_imfinfo__.m
--- a/scripts/image/private/__tiff_imfinfo__.m	Fri Sep 02 20:52:47 2022 +0200
+++ b/scripts/image/private/__tiff_imfinfo__.m	Fri Sep 02 21:20:56 2022 +0200
@@ -17,7 +17,7 @@
     for dir_idx = 1:dir_count
       info(dir_idx).Filename = filename;
       info(dir_idx).FileModDate = strftime ("%e-%b-%Y %H:%M:%S",
-                                  localtime (file_stat.ctime));
+                                  localtime (file_stat.mtime));
       info(dir_idx).FileSize = file_stat.size;
       info(dir_idx).Format = "tif";
       info(dir_idx).FormatVersion = "";
@@ -73,12 +73,11 @@
       endif
     endif
     
-    ## FIXME: implement isBigEndian
-    # if (tif.isBigEndian ())
-    #   info(dir_idx).ByteOrder = "big-endian";
-    # else
-    #   info(dir_idx).ByteOrder = "little-endian";
-    # endif
+    if (tif.isBigEndian ())
+      info(dir_idx).ByteOrder = "big-endian";
+    else
+      info(dir_idx).ByteOrder = "little-endian";
+    endif
     
     info(dir_idx).NewSubFileType ...
       = get_tag_defaulted (tif, Tiff.TagID.SubFileType,
@@ -153,8 +152,7 @@
       = get_tag_defaulted (tif, Tiff.TagID.Thresholding,
                            Tiff.Thresholding.BiLevel);
 
-    ## FIXME: implement getDirectoryOffset method
-    # info(dir_idx).Offset = tif.getDirectoryOffset ();
+    info(dir_idx).Offset = tif.getDirectoryOffset ();
 
     info(dir_idx).ImageDescription ...
       = get_tag_defaulted (tif, Tiff.TagID.ImageDescription, "");
diff -r e5e8cb049b4b -r be6ccdcd5775 scripts/io/Tiff.m
--- a/scripts/io/Tiff.m	Fri Sep 02 20:52:47 2022 +0200
+++ b/scripts/io/Tiff.m	Fri Sep 02 21:20:56 2022 +0200
@@ -227,6 +227,10 @@
       stripLength = __tiff_default_strip_length__ (t.tiff_handle);
     endfunction
 
+    function tf = isBigEndian (t)
+      tf = __tiff_is_big_endian__ (t.tiff_handle);
+    endfunction
+
     function dirNum = currentDirectory (t)
       dirNum = __tiff_current_directory__ (t.tiff_handle);
     endfunction
@@ -255,6 +259,10 @@
       __tiff_set_sub_directory__ (t.tiff_handle, offset);
     endfunction
 
+    function offset = getDirectoryOffset (t)
+      offset = __tiff_get_directory_offset__ (t.tiff_handle);
+    endfunction
+
     % TODO(maged): add documentation and make print_usage work
   endmethods