Enum read_fonts::tables::layout::DeltaFormat

#[repr(u16)]
pub enum DeltaFormat {
    Local2BitDeltas = 1,
    Local4BitDeltas = 2,
    Local8BitDeltas = 3,
    VariationIndex = 32_768,
    // some variants omitted
}

Device delta formats

Variants

Local2BitDeltas = 1

Signed 2-bit value, 8 values per uint16

Local4BitDeltas = 2

Signed 4-bit value, 4 values per uint16

Local8BitDeltas = 3

Signed 8-bit value, 2 values per uint16

VariationIndex = 32_768

VariationIndex table, contains a delta-set index pair.

Implementations

impl DeltaFormat

pub fn new(raw: u16) -> Self

Create from a raw scalar.

This will never fail; unknown values will be mapped to the Unknown variant

Trait Implementations

impl Clone for DeltaFormat

fn clone(&self) -> DeltaFormat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeltaFormat

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

Formats the value using the given formatter.

impl Default for DeltaFormat

fn default() -> DeltaFormat

Returns the “default value” for a type.

impl<'a> From<DeltaFormat> for FieldType<'a>

fn from(src: DeltaFormat) -> FieldType<'a>

Converts to this type from the input type.

impl From<DeltaFormat> for i64

fn from(value: DeltaFormat) -> Self

Converts to this type from the input type.

impl Hash for DeltaFormat

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 Ord for DeltaFormat

fn cmp(&self, other: &DeltaFormat) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for DeltaFormat

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for DeltaFormat

fn partial_cmp(&self, other: &DeltaFormat) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Scalar for DeltaFormat

type Raw = <u16 as Scalar>::Raw

The raw byte representation of this type.

fn to_raw(self) -> Self::Raw

Encode this type as raw big-endian bytes

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

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

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

Attempt to read a scalar from a slice.

impl Copy for DeltaFormat

impl Eq for DeltaFormat

impl StructuralPartialEq for DeltaFormat