Trait font_types::Scalar

pub trait Scalar: Sized {
    type Raw: BeByteArray;

    // Required methods
    fn from_raw(raw: Self::Raw) -> Self;
    fn to_raw(self) -> Self::Raw;

    // Provided method
    fn read(slice: &[u8]) -> Option<Self> { ... }
}

A trait for font scalars.

This is an internal trait for encoding and decoding big-endian bytes.

You do not need to implement this trait directly; it is an implementation detail of the BigEndian wrapper.

Required Associated Types

type Raw: BeByteArray

The raw byte representation of this type.

Required Methods

fn from_raw(raw: Self::Raw) -> Self

Create an instance of this type from raw big-endian bytes

fn to_raw(self) -> Self::Raw

Encode this type as raw big-endian bytes

Provided Methods

fn read(slice: &[u8]) -> Option<Self>

Attempt to read a scalar from a slice.

This will always succeed if slice.len() == Self::RAW_BYTE_LEN, and will always return None otherwise.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl Scalar for i8

type Raw = [u8; 1]

fn to_raw(self) -> [u8; 1]

fn from_raw(raw: [u8; 1]) -> i8

impl Scalar for i16

type Raw = [u8; 2]

fn to_raw(self) -> [u8; 2]

fn from_raw(raw: [u8; 2]) -> i16

impl Scalar for i32

type Raw = [u8; 4]

fn to_raw(self) -> [u8; 4]

fn from_raw(raw: [u8; 4]) -> i32

impl Scalar for i64

type Raw = [u8; 8]

fn to_raw(self) -> [u8; 8]

fn from_raw(raw: [u8; 8]) -> i64

impl Scalar for u8

type Raw = [u8; 1]

fn to_raw(self) -> [u8; 1]

fn from_raw(raw: [u8; 1]) -> u8

impl Scalar for u16

type Raw = [u8; 2]

fn to_raw(self) -> [u8; 2]

fn from_raw(raw: [u8; 2]) -> u16

impl Scalar for u32

type Raw = [u8; 4]

fn to_raw(self) -> [u8; 4]

fn from_raw(raw: [u8; 4]) -> u32

Implementors

impl Scalar for F2Dot14

type Raw = [u8; 2]

impl Scalar for F4Dot12

type Raw = [u8; 2]

impl Scalar for F6Dot10

type Raw = [u8; 2]

impl Scalar for FWord

type Raw = [u8; 2]

impl Scalar for Fixed

type Raw = [u8; 4]

impl Scalar for GlyphId16

type Raw = [u8; 2]

impl Scalar for Int24

type Raw = [u8; 3]

impl Scalar for LongDateTime

type Raw = [u8; 8]

impl Scalar for MajorMinor

type Raw = [u8; 4]

impl Scalar for NameId

type Raw = [u8; 2]

impl Scalar for Offset16

type Raw = <u16 as Scalar>::Raw

impl Scalar for Offset24

type Raw = <Uint24 as Scalar>::Raw

impl Scalar for Offset32

type Raw = <u32 as Scalar>::Raw

impl Scalar for Tag

type Raw = [u8; 4]

impl Scalar for UfWord

type Raw = [u8; 2]

impl Scalar for Uint24

type Raw = [u8; 3]

impl Scalar for Version16Dot16

type Raw = [u8; 4]

impl<T: Scalar> Scalar for Nullable<T>

type Raw = <T as Scalar>::Raw