Struct read_fonts::tables::layout::LookupFlag

pub struct LookupFlag(/* private fields */);

The LookupFlag bit enumeration.

Implementations

impl LookupFlag

pub const RIGHT_TO_LEFT: Self = _

This bit relates only to the correct processing of GPOS type 3 (cursive attachment) lookups

When this bit is set, the last glyph in a given sequence to which the cursive attachment lookup is applied, will be positioned on the baseline.

pub const IGNORE_BASE_GLYPHS: Self = _

If set, skips over base glyphs

pub const IGNORE_LIGATURES: Self = _

If set, skips over ligatures

pub const IGNORE_MARKS: Self = _

If set, skips over all combining marks

pub const USE_MARK_FILTERING_SET: Self = _

If set, indicates that the lookup table structure is followed by a MarkFilteringSet field.

The layout engine skips over all mark glyphs not in the mark filtering set indicated.

pub fn empty() -> Self

Return new, empty flags

pub fn from_bits_truncate(bits: u16) -> Self

Construct a LookupFlag from a raw value, discarding invalid bits

pub fn to_bits(self) -> u16

Raw transmutation to u16.

pub fn right_to_left(self) -> bool

This bit relates only to the correct processing of the cursive attachment lookup type (GPOS lookup type 3).

When this bit is set, the last glyph in a given sequence to which the cursive attachment lookup is applied, will be positioned on the baseline.

pub fn set_right_to_left(&mut self, val: bool)

This bit relates only to the correct processing of the cursive attachment lookup type (GPOS lookup type 3).

When this bit is set, the last glyph in a given sequence to which the cursive attachment lookup is applied, will be positioned on the baseline.

pub fn ignore_base_glyphs(self) -> bool

If set, skips over base glyphs

pub fn set_ignore_base_glyphs(&mut self, val: bool)

If set, skips over base glyphs

pub fn ignore_ligatures(self) -> bool

If set, skips over ligatures

pub fn set_ignore_ligatures(&mut self, val: bool)

If set, skips over ligatures

pub fn ignore_marks(self) -> bool

If set, skips over all combining marks

pub fn set_ignore_marks(&mut self, val: bool)

If set, skips over all combining marks

pub fn use_mark_filtering_set(self) -> bool

If set, indicates that the lookup table structure is followed by a MarkFilteringSet field.

The layout engine skips over all mark glyphs not in the mark filtering set indicated.

pub fn set_use_mark_filtering_set(&mut self, val: bool)

If set, indicates that the lookup table structure is followed by a MarkFilteringSet field.

The layout engine skips over all mark glyphs not in the mark filtering set indicated.

pub fn mark_attachment_type_mask(self) -> Option<u16>

If not zero, skips over all marks of attachment type different from specified.

pub fn set_mark_attachment_type(&mut self, val: u16)

If not zero, skips over all marks of attachment type different from specified.

Trait Implementations

impl BitOr for LookupFlag

type Output = LookupFlag

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation.

impl BitOrAssign for LookupFlag

fn bitor_assign(&mut self, rhs: Self)

Performs the |= operation.

impl Clone for LookupFlag

fn clone(&self) -> LookupFlag

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LookupFlag

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

Formats the value using the given formatter.

impl Default for LookupFlag

fn default() -> LookupFlag

Returns the “default value” for a type.

impl Hash for LookupFlag

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 LookupFlag

fn cmp(&self, other: &LookupFlag) -> 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 LookupFlag

fn eq(&self, other: &LookupFlag) -> 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 LookupFlag

fn partial_cmp(&self, other: &LookupFlag) -> 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 LookupFlag

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 LookupFlag

impl Eq for LookupFlag

impl StructuralPartialEq for LookupFlag