Enum Filter 

#[non_exhaustive]
#[repr(u8)]
pub enum Filter {
    RobidouxFast = 1,
    Robidoux = 2,
    RobidouxSharp = 3,
    Ginseng = 4,
    GinsengSharp = 5,
    Lanczos = 6,
    LanczosSharp = 7,
    Lanczos2 = 8,
    Lanczos2Sharp = 9,
    CubicFast = 10,
    Cubic = 11,
    CubicSharp = 12,
    CatmullRom = 13,
    Mitchell = 14,
    CubicBSpline = 15,
    Hermite = 16,
    Jinc = 17,
    RawLanczos3 = 18,
    RawLanczos3Sharp = 19,
    RawLanczos2 = 20,
    RawLanczos2Sharp = 21,
    Triangle = 22,
    Linear = 23,
    Box = 24,
    CatmullRomFast = 25,
    CatmullRomFastSharp = 26,
    Fastest = 27,
    MitchellFast = 28,
    NCubic = 29,
    NCubicSharp = 30,
    LegacyIDCTFilter = 31,
}

Named interpolation filter presets.

These match imageflow’s filter names exactly for compatibility.

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.

RobidouxFast = 1

Robidoux with smaller window — faster, slight quality loss

Robidoux = 2

Balanced cubic filter — good default for downscaling

RobidouxSharp = 3

Robidoux with sharpening — more detail, slight ringing

Ginseng = 4

Jinc-windowed sinc — excellent for upscaling

GinsengSharp = 5

Ginseng with sharpening

Lanczos = 6

Lanczos-3 windowed sinc — sharp, some ringing

LanczosSharp = 7

Lanczos-3 with sharpening

Lanczos2 = 8

Lanczos-2 windowed sinc — less ringing than Lanczos-3

Lanczos2Sharp = 9

Lanczos-2 with sharpening

CubicFast = 10

Fast bicubic approximation

Cubic = 11

Standard cubic (B=0, C=1)

CubicSharp = 12

Cubic with sharpening

CatmullRom = 13

Catmull-Rom spline (B=0, C=0.5)

Mitchell = 14

Mitchell-Netravali (B=1/3, C=1/3) — balanced blur/ringing

CubicBSpline = 15

Cubic B-spline (B=1, C=0) — very smooth, blurs

Hermite = 16

Hermite (B=0, C=0) — smooth interpolation

Jinc = 17

Jinc function — circular sinc

RawLanczos3 = 18

Raw Lanczos-3 without windowing

RawLanczos3Sharp = 19

Raw Lanczos-3 with sharpening

RawLanczos2 = 20

Raw Lanczos-2 without windowing

RawLanczos2Sharp = 21

Raw Lanczos-2 with sharpening

Triangle = 22

Triangle/tent filter — linear interpolation

Linear = 23

Linear interpolation (same as Triangle)

Box = 24

Box/nearest neighbor — fastest, blocky

CatmullRomFast = 25

Fast Catmull-Rom with smaller window

CatmullRomFastSharp = 26

Fast Catmull-Rom with sharpening

Fastest = 27

Fastest filter — minimal quality

MitchellFast = 28

Fast Mitchell with smaller window

NCubic = 29

NCubic — optimized cubic

NCubicSharp = 30

NCubic with sharpening

LegacyIDCTFilter = 31

Legacy IDCT filter

Implementations

impl Filter

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

Get all filter variants for iteration.

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

Get the filter name as a string.

Trait Implementations

impl Clone for Filter

fn clone(&self) -> Filter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Filter

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

Formats the value using the given formatter.

impl Default for Filter

fn default() -> Filter

Returns the “default value” for a type.

impl Hash for Filter

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

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 Ord for Filter

fn cmp(&self, other: &Filter) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Filter

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Filter

fn partial_cmp(&self, other: &Filter) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Filter

impl Eq for Filter

impl StructuralPartialEq for Filter