Enum BlendMode 

pub enum BlendMode {
    Src,
    Dst,
    SrcOver,
    DstOver,
    SrcIn,
    DstIn,
    SrcOut,
    DstOut,
    SrcAtop,
    DstAtop,
    Xor,
    Plus,
    Modulate,
    Multiply,
    Screen,
    Overlay,
    Darken,
    Lighten,
}

How a source colour is combined with the destination underneath it.

The Porter–Duff set plus the separable blends, evaluated on premultiplied, sRGB-encoded values. SrcOver is the ordinary “paint this on top” and the default nearly everywhere; the rest exist because a mask or a colour filter is often defined by one of them — a fade-out is DstIn, a tint is Modulate, a highlight is Screen.

Variants

Src

The source only; the destination is discarded.

Dst

The destination only; the source is discarded.

SrcOver

The source over the destination — the ordinary one.

DstOver

The destination over the source.

SrcIn

The source, kept only where the destination is opaque.

DstIn

The destination, kept only where the source is opaque.

SrcOut

The source, kept only where the destination is transparent.

DstOut

The destination, kept only where the source is transparent.

SrcAtop

The source over the destination, clipped to the destination’s shape.

DstAtop

The destination over the source, clipped to the source’s shape.

Xor

Whichever of the two is alone there.

Plus

The two added, clamped at white.

Modulate

The two multiplied, ignoring coverage — the classic tint, and what a ShaderMask uses by default.

Multiply

The two multiplied, respecting coverage: always darker.

Screen

The inverse of multiplying the inverses: always lighter.

Overlay

Multiply where the destination is dark, Screen where it is light.

Darken

The darker of the two, per channel.

Lighten

The lighter of the two, per channel.

Implementations

impl BlendMode

pub const fn code(self) -> u32

The mode’s rank in the shader’s branch — the one number the GPU is given. Public because frus-gpu is a separate crate; there is no other reason to look at it.

Trait Implementations

impl Clone for BlendMode

fn clone(&self) -> BlendMode

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<(), Error>

Formats the value using the given formatter.

impl Default for BlendMode

fn default() -> BlendMode

Returns the “default value” for a type.

impl Eq for BlendMode

impl Hash for BlendMode

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BlendMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BlendMode