Returns the maximum sampling radius for a resampling filter.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The resampling filter to query.
The flags you intend to pass to the horizontal or vertical shear function.
The maximum sampling radius for the specified resampling filter.
This function returns the maximum distance from any pixel that the filter will look, either horizontally or vertically, depending on whether a horizontal or vertical shear is used. It's analogous to
v, but might be slightly larger to allow for extra slope when dealing with subpixel coordinates during resampling.