Enum AlphFiltering 

pub enum AlphFiltering {
    None,
    Horizontal,
    Vertical,
    Gradient,
}

Filtering method (F) per RFC 9649 §2.7.1.2.

The four values are exhaustive within the 2-bit field; the spec defines a prediction rule for each (None / A / B / clip(A+B-C)).

Variants

None

0: predictor = 0 for every pixel (no filter).

Horizontal

1: predictor = A (the pixel to the left).

Vertical

2: predictor = B (the pixel above).

Gradient

3: predictor = clip(A + B - C) — the gradient predictor.

Trait Implementations

impl Clone for AlphFiltering

fn clone(&self) -> AlphFiltering

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AlphFiltering

impl Debug for AlphFiltering

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

Formats the value using the given formatter.

impl Eq for AlphFiltering

impl PartialEq for AlphFiltering

fn eq(&self, other: &AlphFiltering) -> 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 StructuralPartialEq for AlphFiltering