MPSImageEdgeMode.zero
Out-of-bound pixels are set to (0.0, 0.0, 0.0, 1.0) for images without an alpha channel or (0.0, 0.0, 0.0, 0.0) for images with an alpha channel, as defined by their pixel format.
Declaration
case zeroOut-of-bound pixels are set to (0.0, 0.0, 0.0, 1.0) for images without an alpha channel or (0.0, 0.0, 0.0, 0.0) for images with an alpha channel, as defined by their pixel format.
case zero