Enum Alpha 

#[non_exhaustive]
pub enum Alpha {
    Lossless,
    Discard,
}

What the encoder does with the alpha plane of an RGBA input.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Lossless

Keep the plane and write it so it decodes byte for byte.

Discard

Drop the plane and write an opaque image.

Trait Implementations

impl Clone for Alpha

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Alpha

impl Debug for Alpha

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

Formats the value using the given formatter.

impl Default for Alpha

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Alpha

impl PartialEq for Alpha

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Alpha