Enum LayerOperation 

pub enum LayerOperation {
    Multiply,
    Add,
    Overlay,
}

How a LaidLayer’s value l combines with the value b it changes (per channel), weighted by the layer’s own opacity w.

Variants

Multiply

b * (1 + (l - 1) * w): b * l where the layer is opaque, b where it is clear.

Add

b + l * w.

Overlay

b + (overlay(b, l) - b) * w, where overlay(b, l) is 2 b l for b below 0.5 and 1 - 2 (1 - b) (1 - l) otherwise.

Implementations

impl LayerOperation

pub fn apply(self, b: f32, l: f32, w: f32) -> f32

b changed by l at weight w.

Trait Implementations

impl Clone for LayerOperation

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 LayerOperation

impl Debug for LayerOperation

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

Formats the value using the given formatter.

impl Eq for LayerOperation

impl PartialEq for LayerOperation

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for LayerOperation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LayerOperation