Enum Interpolation 

#[non_exhaustive]
#[repr(u32)]
pub enum Interpolation {
    Bilinear = 0,
    Nearest = 1,
    Bicubic = 2,
    Area = 3,
}

Resampling filter. The code is the one the C EF_INTERPOLATION_* enumerators use; the string is the edgefirst.json and Python name.

The image crate runs Nearest and Bilinear (half-pixel centres, two taps per axis at every scale, matching OpenCV INTER_LINEAR). Bicubic and Area describe reference pipelines; asking the image crate for them logs a warning and runs supported.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Bilinear = 0

Bilinear (the default).

Nearest = 1

Nearest neighbour.

Bicubic = 2

Bicubic.

Area = 3

Pixel-area averaging.

Implementations

impl Interpolation

pub const fn code(self) -> u32

The shared code for this variant. Identical on every surface.

const, deliberately: a downstream binding that cannot write Variant = OtherEnum::Variant.code() in a #[pyclass] discriminant position (PyO3 requires a literal there) can still pin that literal to this value with a const _: () = assert!(...) – a build-time check instead of a hand-synced comment. See PyTensorMemory/PyPixelFormat in crates/python-common/src/tensor.rs for the consumer.

pub fn from_code(code: u32) -> Option<Interpolation>

Reject an unknown code rather than guessing at one.

pub fn as_str(self) -> &'static str

The wire string form – stable, unlike Debug.

pub fn from_str_code(s: &str) -> Option<Interpolation>

Reject an unknown string rather than guessing at one.

pub fn all() -> &'static [Interpolation]

Every variant, for exhaustive cross-surface tests.

impl Interpolation

pub const fn supported(self) -> Interpolation

The filter the image crate runs for this one: itself for Nearest and Bilinear, else Bilinear.

Trait Implementations

impl Clone for Interpolation

fn clone(&self) -> Interpolation

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Interpolation

impl Debug for Interpolation

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Interpolation

fn default() -> Interpolation

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Interpolation

fn deserialize<D>( d: D, ) -> Result<Interpolation, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Interpolation

impl Hash for Interpolation

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Interpolation

fn eq(&self, other: &Interpolation) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Interpolation

fn serialize<S>( &self, s: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Interpolation