Blends together two images with the given blend mode.
Until the first call to gtk.snapshot.Snapshot.pop, the
bottom image for the blend operation will be recorded.
After that call, the top image to be blended will be
recorded until the second call to gtk.snapshot.Snapshot.pop.
Blends together two images with the given blend mode.
Until the first call to gtk.snapshot.Snapshot.pop, the bottom image for the blend operation will be recorded. After that call, the top image to be blended will be recorded until the second call to gtk.snapshot.Snapshot.pop.
Calling this function requires two subsequent calls to gtk.snapshot.Snapshot.pop.