Remove the EXIF orientation tag when loading

The HEIF specification states that the EXIF orientation tag is only informational and should not be used to rotate the image. See strukturag/libheif#227 (comment)
0xC0000054 · Aug 20, 2020 · 46cbcb1 · 46cbcb1
1 parent b50311f
commit 46cbcb1
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/HeicFile.cs b/src/HeicFile.cs
@@ -156,6 +156,10 @@ private static void AddMetadataToDocument(Document document, SafeHeifImageHandle
                     if (metadataEntries != null)
                     {
                         metadataEntries.Remove(MetadataKeys.Image.InterColorProfile);
+                        // The HEIF specification states that the EXIF orientation tag is only
+                        // informational and should not be used to rotate the image.
+                        // See https://github.com/strukturag/libheif/issues/227#issuecomment-642165942
+                        metadataEntries.Remove(MetadataKeys.Image.Orientation);
 
                         foreach (MetadataEntry item in metadataEntries)
                         {