Handle EXIF rotation information when generating thumbnail.

1 files changed, 18 insertions, 0 deletions

diff --git a/utils/postutil.py b/utils/postutil.py
index 86bd472..1ac32c3 100644
--- a/utils/postutil.py
+++ b/utils/postutil.py
@@ -57,6 +57,24 @@ def generate_thumbnail(file):
         with Image(filename=file) as i:
             if i.height <= dim and i.width <= dim and i.format.lower() != "png":
                 return None
+            if "exif:Orientation" in i.metadata:
+                o = int(i.metadata['exif:Orientation'][:1])
+                match o:
+                    case 0: pass
+                    case 1: pass
+                    case 2: i.flop()
+                    case 3: i.rotate(180)
+                    case 4:
+                        i.flop()
+                        i.rotate(180)
+                    case 5:
+                        i.flip()
+                        i.rotate(90)
+                    case 6: i.rotate(90)
+                    case 7:
+                        i.flip()
+                        i.rotate(270)
+                    case 8: i.rotate(270)
             s = dim / max(i.height, i.width)
             i.resize(int(i.width * s), int(i.height * s), "lanczos2")
             i.format = "webp"