Enum nannou::image::png::FilterType

pub enum FilterType {
    NoFilter,
    Sub,
    Up,
    Avg,
    Paeth,
    // some variants omitted
}

Filter algorithms used to process image data to improve compression.

The default filter is Sub though this default may change in the future, most notable if an adaptive encoding option is implemented.

Variants

NoFilter

No processing done, best used for low bit depth greyscale or data with a low color count

Sub

Filters based on previous pixel in the same scanline

Up

Filters based on the scanline above

Avg

Filters based on the average of left and right neighbor pixels

Paeth

Algorithm that takes into account the left, upper left, and above pixels

Trait Implementations

impl Clone for FilterType

pub fn clone(&self) -> FilterType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for FilterType

impl Debug for FilterType

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

Formats the value using the given formatter.

impl Default for FilterType

pub fn default() -> FilterType

Returns the “default value” for a type.

impl Eq for FilterType

impl PartialEq<FilterType> for FilterType

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

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

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

This method tests for !=.

impl StructuralEq for FilterType

impl StructuralPartialEq for FilterType