Derived from the stored image, not from the screenshot it was cut out of, so the
thumbnail is a picture of the photo rather than a second, independently-framed crop of
the world. That matters in LANDSCAPE, where the two are different shapes. It costs one
extra decode of an image the engine has just encoded, on a path that is already waiting
on a round trip.
The thumbnail for a finished capture.
Derived from the stored image, not from the screenshot it was cut out of, so the thumbnail is a picture of the photo rather than a second, independently-framed crop of the world. That matters in LANDSCAPE, where the two are different shapes. It costs one extra decode of an image the engine has just encoded, on a path that is already waiting on a round trip.