two additional tags for saving color images with libtiff

PIL/TiffImagePlugin.py

@@ -923,6 +923,9 @@ def _save(im, fp, filename):
                               "tiff_sgilog", "tiff_sgilog24",
                               "tiff_raw_16"]
 
+    # required for color libtiff images
+    ifd[PLANAR_CONFIGURATION] = getattr(im, '_planar_configuration', 1)
+    
     # -- multi-page -- skip TIFF header on subsequent pages
     if not libtiff and fp.tell() == 0:
         # tiff header (write via IFD to get everything right)
@@ -1014,6 +1017,8 @@ def _save(im, fp, filename):
 
         blocklist =  [STRIPOFFSETS, STRIPBYTECOUNTS, ROWSPERSTRIP, ICCPROFILE] # ICC Profile crashes.
         atts={}
+        # bits per sample is a single short in the tiff directory, not a list. 
+        atts[BITSPERSAMPLE] = bits[0]
         # Merge the ones that we have with (optional) more bits from
         # the original file, e.g x,y resolution so that we can
         # save(load('')) == original file.

Tests/test_file_libtiff.py

@@ -179,3 +179,31 @@ def test_g4_string_info():
     assert_equal('temp.tif', reread.tag[269])
 
 
+def test_blur():
+    # test case from irc, how to do blur on b/w image and save to compressed tif. 
+    from PIL import ImageFilter
+    out = tempfile('temp.tif')
+    im = Image.open('Tests/images/pport_g4.tif')
+    im = im.convert('L')
+
+    im=im.filter(ImageFilter.GaussianBlur(4))
+    im.save(out, compression='tiff_adobe_deflate')
+
+    im2 = Image.open(out)
+    im2.load()
+
+    assert_image_equal(im, im2)
+
+
+def test_packbits():
+    #im.info['compression']='packbits'
+    pass
+
+
+def test_cmyk_save():
+    im = lena('CMYK')
+    out = tempfile('temp.tif')
+
+    im.save(out, compression='tiff_adobe_deflate')
+    im2 = Image.open(out)
+    assert_image_equal(im, im2)