Enum jpeg_decoder::UnsupportedFeature

pub enum UnsupportedFeature {
    Hierarchical,
    ArithmeticEntropyCoding,
    SamplePrecision(u8),
    ComponentCount(u8),
    DNL,
    SubsamplingRatio,
    NonIntegerSubsamplingRatio,
    ColorTransform(ColorTransform),
}

An enumeration over JPEG features (currently) unsupported by this library.

Support for features listed here may be included in future versions of this library.

Variants

Hierarchical

Hierarchical JPEG.

ArithmeticEntropyCoding

JPEG using arithmetic entropy coding instead of Huffman coding.

SamplePrecision(u8)

Sample precision in bits. 8 bit sample precision is what is currently supported in non-lossless coding process.

ComponentCount(u8)

Number of components in an image. 1, 3 and 4 components are currently supported.

DNL

An image can specify a zero height in the frame header and use the DNL (Define Number of Lines) marker at the end of the first scan to define the number of lines in the frame.

SubsamplingRatio

Subsampling ratio.

NonIntegerSubsamplingRatio

A subsampling ratio not representable as an integer.

ColorTransform(ColorTransform)

Colour transform

Trait Implementations

impl Clone for UnsupportedFeature

fn clone(&self) -> UnsupportedFeature

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for UnsupportedFeature

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

Formats the value using the given formatter.

impl Hash for UnsupportedFeature

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,

Feeds a slice of this type into the given Hasher.

impl PartialEq<UnsupportedFeature> for UnsupportedFeature

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

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

const 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 Eq for UnsupportedFeature

impl StructuralEq for UnsupportedFeature

impl StructuralPartialEq for UnsupportedFeature