Add a guard if PIL doesn't support ImageCms.

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## 1.20.6
 
+### Changes
+- Add a guard if PIL doesn't support ImageCms ([#1032](../../pull/1032))
+
 ### Bug Fixes
 - Allow clearing the min/max fields of the frame selector ([#1030](../../pull/1030))
 - Fix a bug with caching tiles and styling ([#1031](../../pull/1031))

large_image/tilesource/base.py

@@ -1281,7 +1281,16 @@ def _applyICCProfile(self, sc, frame):
             intent = getattr(PIL.ImageCms, 'INTENT_' + str(sc.style.get('icc')).upper(),
                              PIL.ImageCms.INTENT_PERCEPTUAL)
         if not hasattr(self, '_iccsrgbprofile'):
-            self._iccsrgbprofile = PIL.ImageCms.createProfile('sRGB')
+            try:
+                self._iccsrgbprofile = PIL.ImageCms.createProfile('sRGB')
+            except ImportError:
+                self._iccsrgbprofile = None
+                self.logger.warning(
+                    'Failed to import PIL.ImageCms.  Cannot perform ICC '
+                    'color adjustments.  Does your platform support '
+                    'PIL.ImageCms?')
+        if self._iccsrgbprofile is None:
+            return sc.image
         try:
             key = (mode, intent)
             if self._iccprofilesObjects[profileIdx] is None: