Enum tiny_skia::AlphaType

pub enum AlphaType {
    Unknown,
    Opaque,
    Premultiplied,
    Unpremultiplied,
}

Describes how to interpret the alpha component of a pixel.

A pixel may be opaque, or alpha, describing multiple levels of transparency.

In simple blending, alpha weights the draw color and the destination color to create a new color. If alpha describes a weight from zero to one:

new color = draw color * alpha + destination color * (1 - alpha)

In practice alpha is encoded in two or more bits, where 1.0 equals all bits set.

RGB may have alpha included in each component value; the stored value is the original RGB multiplied by alpha. Premultiplied color components improve performance.

Variants

Unknown

Opaque

Premultiplied

Unpremultiplied

Trait Implementations

impl Clone for AlphaType

fn clone(&self) -> AlphaType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for AlphaType

impl Debug for AlphaType

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

Formats the value using the given formatter.

impl Eq for AlphaType

impl Hash for AlphaType

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, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<AlphaType> for AlphaType

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

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

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralEq for AlphaType

impl StructuralPartialEq for AlphaType