Enum BlendMode 

pub enum BlendMode {
    SourceOver,
    Plus,
    Multiply,
    Screen,
    Darken,
    Lighten,
    Difference,
    Exclusion,
    Overlay,
    HardLight,
    SoftLight,
    ColorDodge,
    ColorBurn,
    Hue,
    Saturation,
    Color,
    Luminosity,
    // some variants omitted
}

Linear-light layer blending, with explicit compositing space.

Separable modes evaluate straight linear channels with source-over alpha. Extended RGB is not gamut-clipped. Plus instead adds premultiplied RGB and clamps the summed alpha to one. Dodge/Burn retain their formula’s intrinsic endpoints and saturation; other modes extend their piecewise formulas without input clipping. Nonseparable modes use hue/saturation/luminosity replacement.

Variants

SourceOver

Premultiplied source-over; the default.

Plus

Unclipped additive RGB with saturated additive alpha.

Multiply

Product of straight source and backdrop channels.

Screen

Source plus backdrop minus their product.

Darken

Minimum of straight source and backdrop channels.

Lighten

Maximum of straight source and backdrop channels.

Difference

Absolute difference of straight channels.

Exclusion

Source plus backdrop minus twice their product.

Overlay

Multiply or screen, selected by the backdrop channel at one half.

HardLight

Multiply or screen, selected by the source channel at one half.

SoftLight

Piecewise soft lighting, with the low-backdrop cubic and upper square root.

ColorDodge

Backdrop divided by one minus source, saturated above at one.

Nonpositive backdrop returns zero before source at or above one returns one.

ColorBurn

One minus the saturated ratio of one minus backdrop to source.

Backdrop at or above one returns one before nonpositive source returns zero.

Hue

Source hue with backdrop saturation and luminosity.

Saturation

Source saturation with backdrop hue and luminosity.

Color

Source hue/saturation with backdrop luminosity.

Luminosity

Source luminosity with backdrop hue/saturation.

Trait Implementations

impl Clone for BlendMode

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 BlendMode

impl Debug for BlendMode

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

Formats the value using the given formatter.

impl Default for BlendMode

fn default() -> Self

Returns the “default value” for a type.

impl Eq for BlendMode

impl PartialEq for BlendMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BlendMode