Enum jpeg_encoder::SamplingFactor

#[repr(u8)]
pub enum SamplingFactor {
    F_1_1 = 17,
    F_2_1 = 33,
    F_1_2 = 18,
    F_2_2 = 34,
    F_4_1 = 65,
    F_4_2 = 66,
    F_1_4 = 20,
    F_2_4 = 36,
    R_4_4_4 = 145,
    R_4_4_0 = 146,
    R_4_4_1 = 148,
    R_4_2_2 = 161,
    R_4_2_0 = 162,
    R_4_2_1 = 164,
    R_4_1_1 = 193,
    R_4_1_0 = 194,
}

Sampling factors for chroma subsampling

Warning

Sampling factor of 4 are not supported by all decoders or applications

Variants

F_1_1 = 17

F_2_1 = 33

F_1_2 = 18

F_2_2 = 34

F_4_1 = 65

F_4_2 = 66

F_1_4 = 20

F_2_4 = 36

R_4_4_4 = 145

Alias for F_1_1

R_4_4_0 = 146

Alias for F_1_2

R_4_4_1 = 148

Alias for F_1_4

R_4_2_2 = 161

Alias for F_2_1

R_4_2_0 = 162

Alias for F_2_2

R_4_2_1 = 164

Alias for F_2_4

R_4_1_1 = 193

Alias for F_4_1

R_4_1_0 = 194

Alias for F_4_2

Implementations

impl SamplingFactor

pub fn from_factors(horizontal: u8, vertical: u8) -> Option<SamplingFactor>

Get variant for supplied factors or None if not supported

Trait Implementations

impl Clone for SamplingFactor

fn clone(&self) -> SamplingFactor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SamplingFactor

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

Formats the value using the given formatter.

impl PartialEq for SamplingFactor

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for SamplingFactor

impl Eq for SamplingFactor

impl StructuralEq for SamplingFactor

impl StructuralPartialEq for SamplingFactor