Native Masks

Mask images control the alpha of a painted native view while its content stays in place.

.photo-star {
  mask-image: radial-gradient(circle, black 46%, transparent 68%);
  mask-position: center;
  mask-repeat: no-repeat;
  mask-size: contain;
}

Nitrowind supports URL and gradient alpha masks with native size, position, repeat, and animation updates on iOS and Android.

Mask animation changes the mask transform or opacity track; it does not rotate the underlying image or outer border.