Struct TransferSet 

pub struct TransferSet<'a> {
    pub rgb: [&'a [u8; 256]; 3],
    pub gray: &'a [u8; 256],
    pub cmyk: [&'a [u8; 256]; 4],
    pub device_n: &'a [[u8; 256]],
}

Borrowed references to all transfer LUTs from a GraphicsState.

Constructed via GraphicsState::transfer_set and stored in crate::PipeState. Avoids cloning the tables for each paint operation.

Fields

rgb: [&'a [u8; 256]; 3]

RGB transfer tables: [R, G, B], each 256 bytes.

gray: &'a [u8; 256]

Gray transfer table, 256 bytes.

cmyk: [&'a [u8; 256]; 4]

CMYK transfer tables: [C, M, Y, K], each 256 bytes.

device_n: &'a [[u8; 256]]

DeviceN transfer tables: SPOT_NCOMPS + 4 tables of 256 bytes each, as a slice.

Shape is intentionally &[[u8; 256]] (slice of owned arrays) rather than &[&[u8; 256]] (slice of references). Production stores these as Vec<[u8; 256]> on GraphicsState because custom transfer functions from PDF /TR produce owned tables; a slice-of-references view would require either rebuilding a Vec<&[u8; 256]> per transfer_set() call (per-paint allocation) or maintaining a parallel index that stays in sync with the owned storage. The owned-array shape keeps the hot path allocation-free at the cost of needing a separate static DN: [[u8; 256]; 8] declaration in each test site.

Implementations

impl TransferSet<'_>

pub fn is_identity_rgb(&self) -> bool

Return true if all three RGB transfer tables are the identity v → v.

Used by the AA fast path to skip the transfer step entirely when it would be a no-op. Checking pointer equality against the static identity table is O(1) and covers the common case; a full element-by-element comparison is the fallback for non-static tables that happen to be identity.

pub fn identity_rgb() -> TransferSet<'static>

Return a TransferSet backed by identity (pass-through) arrays.

Useful in tests and for the initial no-transfer state. The returned value borrows from static memory.

Trait Implementations

impl<'a> Clone for TransferSet<'a>

fn clone(&self) -> TransferSet<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for TransferSet<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for TransferSet<'a>