1 files changed, 104 insertions, 0 deletions
diff --git a/konq-plugins/imagerotation/orient.py b/konq-plugins/imagerotation/orient.py
new file mode 100755
index 0000000..0671876
--- /dev/null
+++ b/konq-plugins/imagerotation/orient.py
@@ -0,0 +1,104 @@
+#! /usr/bin/env python
+import os
+import sys
+import exif
+
+def compose(delta, old):
+  map=[0, 4, 2, 6, 5, 1, 7, 3]
+  unmap=[1, 6, 3, 8, 2, 5, 4, 7]
+  x = map[delta-1]
+  y = map[old-1]
+  z = ((x^y)&4) + ((y+(x&3)*(((y&4)>>1)+1))&3)
+  return unmap[z]
+
+def deg2o(d):
+  map={90:6, 270:8, 180:3}
+  if map.has_key(d):
+    return map[d]
+  else:
+    return 0
+
+if len(sys.argv) < 2:
+  print 'Usage: %s [[+]orientnum] file\n' % sys.argv[0]
+  sys.exit(1)
+try:
+  if len(sys.argv) == 2:
+    filename=sys.argv[1]
+    file=open(filename, "r");
+  else:
+    filename=sys.argv[2]
+    mod=sys.argv[1]
+    fd = os.open(filename, os.O_RDWR)
+    file=os.fdopen(fd,'r')
+    # check file exists and is readable
+    file.read(1)
+    file.seek(0,0)
+except:
+  print 'Cannot open', filename
+  sys.exit(1)
+
+tags=exif.process_file(file,0,1)
+if not tags:
+  print 'no EXIF information in', filename
+  sys.exit(1)
+if not tags.has_key('Exif Offset') \
+    or not tags.has_key('Image Orientation'):
+  print 'cannot get orientation info in', filename
+  sys.exit(1)
+
+exifp = tags['Exif Offset']
+endian = tags['Exif Endian']
+tagp = tags['Image Orientation'].field_offset
+
+orientp = exifp + tagp
+
+if endian == 'M': # MM byte order
+  orientp += 1
+
+file.seek(orientp)
+o = ord(file.read(1))
+
+if o < 1 or o > 8:
+  print 'orientation out of range', o
+  sys.exit(1)
+
+if len(sys.argv) == 2:
+  print 'orientation is', o
+  sys.exit(0)
+
+try:
+  if mod[0] == '+':
+    deltao = int(mod)
+    if 1 <= deltao and deltao <= 8:
+      newo = compose(deltao, o)
+    elif deg2o(deltao) != 0:
+      newo = compose(deg2o(deltao), o)
+    else:
+      print 'cannot understand orientation modification', mod
+      sys.exit(1) # it will still hit the except ... how to fix?
+  else:
+    newo = int(mod)
+except:
+  print 'expected numeric orientation and got',mod
+  sys.exit(1)
+
+if newo < 1 or newo > 8:
+  newo = deg2o(newo)
+  if newo == 0:
+    print 'cannot understand orientation', deltao
+    sys.exit(1)
+
+os.lseek(fd,orientp,0)
+os.write(fd,chr(newo))
+
+# Thumbnail orientation :
+thumb_ifdp = 0
+if tags.has_key('Thumbnail Orientation'):
+  thumb_tagp = tags['Thumbnail Orientation'].field_offset
+  thumb_orientp = exifp + thumb_tagp
+  if endian == 'M': # MM byte order
+    thumb_orientp += 1
+  os.lseek(fd,thumb_orientp,0)
+  os.write(fd,chr(newo))
+
+print 'orientation changed from', o, 'to', newo