Enum sierra::BlendFactor

pub enum BlendFactor {
    Zero,
    One,
    SrcColor,
    OneMinusSrcColor,
    DstColor,
    OneMinusDstColor,
    SrcAlpha,
    OneMinusSrcAlpha,
    DstAlpha,
    OneMinusDstAlpha,
    ConstantColor,
    OneMinusConstantColor,
    ConstantAlpha,
    OneMinusConstantAlpha,
    SrcAlphaSaturate,
}

Defines how blend factor is calculated.

For each variant comment contains an equivalent Rust expression where Rs, Gs, Bs and As are value components from fragment shader’s color output, Rd, Gd, Bd and Ad are value components stored in attachment, and Rc, Gc, Bc and Ac are value components defined in constants.

Variants

Zero

Color: (0.0, 0.0, 0.0) Alpha: 0.0

One

Color: (1.0, 1.0, 1.0) Alpha: 1.0

SrcColor

Color: (Rs, Gs, Bs) Alpha: As

OneMinusSrcColor

Color: (1.0 - Rs, 1.0 - Gs, 1.0 - Bs) Alpha: 1.0 - As

DstColor

Color: (Rd, Gd, Bd) Alpha: Ad

OneMinusDstColor

Color: (1.0 - Rd, 1.0 - Gd, 1.0 - Bd) Alpha: 1.0 - Ad

SrcAlpha

Color: (As, As, As) Alpha: As

OneMinusSrcAlpha

Color: (1.0 - As, 1.0 - As, 1.0 - As) Alpha: 1.0 - As

DstAlpha

Color: (Ad, Ad, Ad) Alpha: Ad

OneMinusDstAlpha

Color: (1.0 - Ad, 1.0 - Ad, 1.0 - Ad) Alpha: 1.0 - Ad

ConstantColor

Color: (Rc, Gc, Bc) Alpha: Ac

OneMinusConstantColor

Color: (1.0 - Rc, 1.0 - Gc, 1.0 - Bc) Alpha: 1.0 - Ac

ConstantAlpha

Color: (Ac, Ac, Ac) Alpha: Ac

OneMinusConstantAlpha

Color: (1.0 - Ac, 1.0 - Ac, 1.0 - Ac) Alpha: 1.0 - Ac

SrcAlphaSaturate

Color: {let f = min(As, 1.0 - Ad); (f,f,f)} Alpha: 1.0

Trait Implementations

impl Clone for BlendFactor

fn clone(&self) -> BlendFactor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BlendFactor

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

Formats the value using the given formatter.

impl Hash for BlendFactor

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

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<BlendFactor> for BlendFactor

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BlendFactor

impl Eq for BlendFactor

impl StructuralEq for BlendFactor

impl StructuralPartialEq for BlendFactor