Enum LetterboxPlacement 

#[non_exhaustive]
#[repr(u32)]
pub enum LetterboxPlacement {
    Center = 0,
    TopLeft = 1,
}

Where a letterboxed image sits inside the destination. The code is the one the C EF_LETTERBOX_PLACEMENT_* enumerators and the Python LetterboxPlacement enum use; the string is the edgefirst.json name.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Center = 0

Centred, padding split between both sides (the default). On odd slack the extra pixel goes to the right or bottom.

TopLeft = 1

Anchored at the top-left corner, padding on the right and bottom.

Implementations

impl LetterboxPlacement

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 LetterboxPlacement

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 LetterboxPlacement

impl Debug for LetterboxPlacement

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

Formats the value using the given formatter.

impl Default for LetterboxPlacement

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for LetterboxPlacement

fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Eq for LetterboxPlacement

impl Hash for LetterboxPlacement

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 LetterboxPlacement

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for LetterboxPlacement

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LetterboxPlacement