Enum Quality 

#[non_exhaustive]
pub enum Quality {
    Traditional(f32),
    Distance(f32),
}

Quality representation that can be either traditional (1-100) or butteraugli distance.

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.

Traditional(f32)

Traditional JPEG quality (1-100, where 100 is best)

Distance(f32)

Butteraugli distance (0.0 = lossless, higher = more compression) Typical values: 0.5 = very high quality, 1.0 = high, 2.0 = medium

Implementations

impl Quality

pub fn from_quality(q: f32) -> Self

Creates a quality setting from traditional JPEG quality (1-100).

pub fn from_distance(d: f32) -> Self

Creates a quality setting from butteraugli distance.

pub fn to_distance(self) -> f32

Converts to butteraugli distance.

pub fn to_quality(self) -> f32

Converts to traditional quality (approximate).

pub fn to_linear(self) -> f32

Converts to linear quality (0.0-1.0 where 1.0 is best).

Trait Implementations

impl Clone for Quality

fn clone(&self) -> Quality

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Quality

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

Formats the value using the given formatter.

impl Default for Quality

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Quality

fn eq(&self, other: &Quality) -> 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 Copy for Quality

impl StructuralPartialEq for Quality