Enum ComputeBackend 

#[repr(u32)]
pub enum ComputeBackend {
    Auto = 0,
    Cpu = 1,
    G2d = 2,
    OpenGl = 3,
}

Compute backend selection for ImageProcessor.

Use with ImageProcessorConfig::backend to select which backend the processor should prefer. When a specific backend is selected, the processor initializes that backend plus CPU as a fallback. When Auto is used, the existing environment-variable-driven selection applies.

The code is the one the C EF_COMPUTE_BACKEND_* enumerators use.

Variants

Auto = 0

Auto-detect based on available hardware and environment variables.

Cpu = 1

CPU-only processing (no hardware acceleration).

G2d = 2

Prefer G2D hardware blitter (+ CPU fallback).

OpenGl = 3

Prefer OpenGL ES (+ CPU fallback).

Implementations

impl ComputeBackend

pub const fn code(self) -> u32

The shared code for this variant. Identical on every surface.

const, deliberately: a downstream binding that cannot write Variant = OtherEnum::Variant.code() in a #[pyclass] discriminant position (PyO3 requires a literal there) can still pin that literal to this value with a const _: () = assert!(...) – a build-time check instead of a hand-synced comment. See PyTensorMemory/PyPixelFormat in crates/python-common/src/tensor.rs for the consumer.

pub fn from_code(code: u32) -> Option<Self>

Reject an unknown code rather than guessing at one.

pub fn as_str(self) -> &'static str

The wire string form – stable, unlike Debug.

pub fn from_str_code(s: &str) -> Option<Self>

Reject an unknown string rather than guessing at one.

pub fn all() -> &'static [Self]

Every variant, for exhaustive cross-surface tests.

Trait Implementations

impl Clone for ComputeBackend

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 ComputeBackend

impl Debug for ComputeBackend

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

Formats the value using the given formatter.

impl Default for ComputeBackend

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ComputeBackend

impl Hash for ComputeBackend

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 ComputeBackend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ComputeBackend