gtk:snapshot-push-blend (snapshot mode)

snapshot -- a gtk:snapshot object
mode -- a gsk:blend-mode value to use

Blends together two images with the given blend mode. Until the first call to the gtk:snapshot-pop function, 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 the gtk:snapshot-pop function.

Calling this function requires two subsequent calls to the gtk:snapshot-pop function.