Enum ExternalTextureNameKey

pub enum ExternalTextureNameKey {
    Plane(usize),
    Params,
}

A component of a lowered external texture.

Whereas the WGSL backend implements ImageClass::External images directly, most other Naga backends lower them to a collection of ordinary textures that represent individual planes (as received from a video decoder, perhaps), together with a struct of parameters saying how they should be cropped, sampled, and color-converted.

This lowering means that individual globals and function parameters in Naga IR must be split out by the backends into collections of globals and parameters of simpler types.

A value of this enum serves as a name key for one specific component in the lowered representation of an external texture. That is, these keys are for variables/parameters that do not exist in the Naga IR, only in its lowered form.

Variants

Plane(usize)

Params

Implementations

impl ExternalTextureNameKey

const ALL: &[(&str, ExternalTextureNameKey)]

Trait Implementations

impl Clone for ExternalTextureNameKey

fn clone(&self) -> ExternalTextureNameKey

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExternalTextureNameKey

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

Formats the value using the given formatter.

impl Hash for ExternalTextureNameKey

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 for ExternalTextureNameKey

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for ExternalTextureNameKey

impl Eq for ExternalTextureNameKey

impl StructuralPartialEq for ExternalTextureNameKey