Struct Subtable 

pub struct Subtable<'a> {
    data: FontData<'a>,
}

A subtable in a kerx table.

Fields

data: FontData<'a>

Implementations

impl<'a> Subtable<'a>

pub const MIN_SIZE: usize

pub fn resolve_offset<O: Offset, R: FontRead<'a>>( &self, offset: O, ) -> Result<R, ReadError>

Resolve the provided offset from the start of this table.

pub fn offset_data(&self) -> FontData<'a>

Return a reference to this table’s raw data.

We use this in the compile crate to resolve offsets.

pub fn shape(&self) -> &Self

👎Deprecated: just use the base type directly

Return a reference to the table’s ‘Shape’ struct.

This is a low level implementation detail, but it can be useful in some cases where you want to know things about a table’s layout, such as the byte offsets of specific fields.

pub fn length(&self) -> u32

The length of this subtable in bytes, including this header.

pub fn coverage(&self) -> u32

Circumstances under which this table is used.

pub fn tuple_count(&self) -> u32

The tuple count. This value is only used with variation fonts and should be 0 for all other fonts. The subtable’s tupleCount will be ignored if the ‘kerx’ table version is less than 4.

pub fn data(&self) -> &'a [u8]

Subtable specific data.

pub fn length_byte_range(&self) -> Range<usize>

pub fn coverage_byte_range(&self) -> Range<usize>

pub fn tuple_count_byte_range(&self) -> Range<usize>

pub fn data_byte_range(&self) -> Range<usize>

impl<'a> Subtable<'a>

pub const HEADER_LEN: usize

pub fn is_vertical(&self) -> bool

True if the table has vertical kerning values.

pub fn is_horizontal(&self) -> bool

True if the table has horizontal kerning values.

pub fn is_cross_stream(&self) -> bool

True if the table has cross-stream kerning values.

If text is normally written horizontally, adjustments will be vertical. If adjustment values are positive, the text will be moved up. If they are negative, the text will be moved down. If text is normally written vertically, adjustments will be horizontal. If adjustment values are positive, the text will be moved to the right. If they are negative, the text will be moved to the left.

pub fn is_variable(&self) -> bool

True if the table has variation kerning values.

pub fn process_direction(&self) -> bool

Process direction flag. If clear, process the glyphs forwards, that is, from first to last in the glyph stream. If we, process them from last to first. This flag only applies to state-table based ‘kerx’ subtables (types 1 and 4).

pub fn kind(&self) -> Result<SubtableKind<'a>, ReadError>

Returns an enum representing the actual subtable data.

Trait Implementations

impl<'a> Clone for Subtable<'a>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> FontRead<'a> for Subtable<'a>

fn read(data: FontData<'a>) -> Result<Self, ReadError>

Read an instance of Self from the provided data, performing validation.

impl<'a> MinByteRange<'a> for Subtable<'a>

fn min_byte_range(&self) -> Range<usize>

fn min_table_bytes(&self) -> &'a [u8]

impl VarSize for Subtable<'_>

type Size = u32

The type of the first (length) field of the item.