--- a/degal/exif.py	Sun Jun 14 23:57:50 2009 +0300
+++ b/degal/exif.py	Mon Jun 15 00:23:55 2009 +0300
@@ -6,6 +6,15 @@
 
 import utils
 
+MIRROR_NONE         = 0
+MIRROR_HORIZONTAL   = 1
+MIRROR_VERTICAL     = 2
+
+ROTATE_NONE         = 0
+ROTATE_90           = 90
+ROTATE_180          = 180
+ROTATE_270          = 270
+
 class ExifHandler (object) :
     """
         Our generic interface for Exif data
@@ -18,12 +27,19 @@
 
         self.file = file
     
+    def image_tag_value (self, tag, default=None) :
+        """
+            Load and return the raw binary value for the given main image tag.
+        """
+
+        return default
+
     def image_tag (self, tag, default=None) :
         """
             Load and return the human-readable unicode-safe value for the given main image tag.
         """
 
-        abstract
+        return default
 
     def image_tags (self, tags) :
         """
@@ -41,6 +57,32 @@
             # filter out default not-found
             if value is not None :
                 yield tag, value
+    
+
+    def get_orientation (self) :
+        """
+            Get the orientation of the image in terms of mirroring and rotation in integer degrees clockwise.
+            
+            Returns a (MIRROR_*, ROTATE_*) tuple, or None if the Orientation tag could not be found.
+
+            Returns None if it could not be found.
+        """
+        
+        # load value
+        orientation = self.image_tag_value('Orientation')
+
+        # map to tuple or None
+        # XXX: these are from EXIFpy, verify
+        return {
+            1:  (MIRROR_NONE,       ROTATE_NONE ),  # Horizontal (normal)
+            2:  (MIRROR_HORIZONTAL, ROTATE_NONE ),  # Mirrored horizontal
+            3:  (MIRROR_NONE,       ROTATE_180  ),  # Rotated 180
+            4:  (MIRROR_VERTICAL,   ROTATE_NONE ),  # Mirrored vertical
+            5:  (MIRROR_HORIZONTAL, ROTATE_270  ),  # Mirrored horizontal then rotated 90 CCW
+            6:  (MIRROR_NONE,       ROTATE_90   ),  # Rotated 90 CW
+            7:  (MIRROR_HORIZONTAL, ROTATE_90   ),  # Mirrored horizontal then rotated 90 CW
+            8:  (MIRROR_NONE,       ROTATE_270  ),  # Rotated 90 CCW
+        }.get(orientation, None)
 
 try :
     import pyexiv2
@@ -63,6 +105,20 @@
             # load
             self.image.readMetadata()
         
+        def image_tag_value (self, tag, default=None) :
+            # try with likely prefixes
+            for prefix in ('Exif.Photo', 'Exif.Image') :
+                try :
+                    return self.image["%s.%s" % (prefix, tag)]
+                
+                except (IndexError, KeyError) :
+                    # nope...
+                    continue
+
+            else :
+                # not ofund
+                return default
+
         def image_tag (self, tag, default=None) :
             # try with likely prefixes
             for prefix in ('Exif.Photo', 'Exif.Image') :