Don't assume /Mask is always a Stream

Fixes #1377
2024-08-31 00:37:52 -07:00
parent b38cac6931
commit b3324c3b4e
1 changed files with 6 additions and 2 deletions
@@ -382,8 +382,12 @@ class ImageInfo:
            self._height = max(smask.get(Name.Height, 0), self._height)
        if (mask := pim.obj.get(Name.Mask, None)) is not None:
            # If the image has a /Mask entry, it has an explicit mask.
-            self._width = max(mask.get(Name.Width, 0), self._width)
-            self._height = max(mask.get(Name.Height, 0), self._height)
+            # /Mask can be a Stream or an Array. If it's a Stream,
+            # use its /Width and /Height if they are larger than the main
+            # image's.
+            if isinstance(mask, Stream):
+                self._width = max(mask.get(Name.Width, 0), self._width)
+                self._height = max(mask.get(Name.Height, 0), self._height)

        # If /ImageMask is true, then this image is a stencil mask
        # (Images that draw with this stencil mask will have a reference to