deepzoom: add ICC profile in returned tiles

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>

Author: bgilbert

openslide/deepzoom.py

@@ -171,6 +171,7 @@ def get_tile(self, level, address):
         # Read tile
         args, z_size = self._get_tile_info(level, address)
         tile = self._osr.read_region(*args)
+        profile = tile.info.get('icc_profile')
 
         # Apply on solid background
         bg = Image.new('RGB', tile.size, self._bg_color)
@@ -182,6 +183,10 @@ def get_tile(self, level, address):
             # Image.LANCZOS removed in Pillow 10
             tile.thumbnail(z_size, getattr(Image, 'Resampling', Image).LANCZOS)
 
+        # Reference ICC profile
+        if profile is not None:
+            tile.info['icc_profile'] = profile
+
         return tile
 
     def _get_tile_info(self, dz_level, t_location):

tests/test_deepzoom.py

@@ -21,7 +21,7 @@
 
 from common import file_path
 
-from openslide import ImageSlide, OpenSlide
+from openslide import ImageSlide, OpenSlide, lowlevel
 from openslide.deepzoom import DeepZoomGenerator
 
 
@@ -77,6 +77,11 @@ def test_metadata(self):
     def test_get_tile(self):
         self.assertEqual(self.dz.get_tile(9, (1, 0)).size, (47, 250))
 
+    def test_tile_color_profile(self):
+        if self.CLASS is OpenSlide and not lowlevel.read_icc_profile.available:
+            self.skipTest("requires OpenSlide 4.0.0")
+        self.assertEqual(len(self.dz.get_tile(9, (1, 0)).info['icc_profile']), 588)
+
     def test_get_tile_bad_level(self):
         self.assertRaises(ValueError, lambda: self.dz.get_tile(-1, (0, 0)))
         self.assertRaises(ValueError, lambda: self.dz.get_tile(10, (0, 0)))