Snapshot.pushMask
void pushMask(gsk.types.MaskMode maskMode)Until the first call to [gtk.snapshot.Snapshot.pop], the mask image for the mask operation will be recorded.
After that call, the source image will be recorded until the second call to [gtk.snapshot.Snapshot.pop].
Calling this function requires 2 subsequent calls to [gtk.snapshot.Snapshot.pop].
Parameters
maskMode | mask mode to use |