Enum FilterStrategy 

pub enum FilterStrategy {
    None,
    Sub,
    Up,
    Average,
    Paeth,
    Fast,
    Best,
}

Filter strategy for encoding.

Variants

None

No filtering (fastest).

Sub

Use Sub filter only.

Up

Use Up filter only.

Average

Use Average filter only.

Paeth

Use Paeth filter only.

Fast

Fast heuristic selection (None, Sub, Up).

Best

Best compression (tries all filters).

Implementations

impl FilterStrategy

pub fn apply( &self, scanline: &[u8], prev_scanline: Option<&[u8]>, bytes_per_pixel: usize, ) -> (FilterType, Vec<u8>)

Apply filter strategy to a scanline.

Returns

Tuple of (filter type, filtered data).

Trait Implementations

impl Clone for FilterStrategy

fn clone(&self) -> FilterStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FilterStrategy

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

Formats the value using the given formatter.

impl Default for FilterStrategy

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for FilterStrategy

fn eq(&self, other: &FilterStrategy) -> 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 FilterStrategy

impl Eq for FilterStrategy

impl StructuralPartialEq for FilterStrategy