Struct Flags

#[repr(transparent)]
pub struct Flags {
    bits: u16,
}

The flags field for the head table.

Fields

bits: u16

Implementations

impl Flags

pub const BASELINE_AT_Y_0: Self

Bit 0: Baseline for font at y=0.

pub const LSB_AT_X_0: Self

Bit 1: Left sidebearing point at x=0 (relevant only for TrueType rasterizers).

pub const INSTRUCTIONS_MAY_DEPEND_ON_POINT_SIZE: Self

Bit 2: Instructions may depend on point size.

pub const FORCE_INTEGER_PPEM: Self

Bit 3: Force ppem to integer values for all internal scaler math; may use fractional ppem sizes if this bit is clear. It is strongly recommended that this be set in hinted fonts.

pub const INSTRUCTIONS_MAY_ALTER_ADVANCE_WIDTH: Self

Bit 4: Instructions may alter advance width (the advance widths might not scale linearly).

pub const LOSSLESS_TRANSFORMED_FONT_DATA: Self

Bit 11: Font data is “lossless” as a result of having been subjected to optimizing transformation and/or compression (such as compression mechanisms defined by ISO/IEC 14496-18, MicroType® Express, WOFF 2.0, or similar) where the original font functionality and features are retained but the binary compatibility between input and output font files is not guaranteed. As a result of the applied transform, the DSIG table may also be invalidated.

pub const CONVERTED_FONT: Self

Bit 12: Font converted (produce compatible metrics).

pub const OPTIMIZED_FOR_CLEARTYPE: Self

Bit 13: Font optimized for ClearType. Note, fonts that rely on embedded bitmaps (EBDT) for rendering should not be considered optimized for ClearType, and therefore should keep this bit cleared.

pub const LAST_RESORT_FONT: Self

Bit 14: Last Resort font. If set, indicates that the glyphs encoded in the ‘cmap’ subtables are simply generic symbolic representations of code point ranges and do not truly represent support for those code points. If unset, indicates that the glyphs encoded in the ‘cmap’ subtables represent proper support for those code points.

impl Flags

pub const fn empty() -> Self

Returns an empty set of flags.

pub const fn all() -> Self

Returns the set containing all flags.

pub const fn bits(&self) -> u16

Returns the raw value of the flags currently stored.

pub const fn from_bits(bits: u16) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u16) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both.

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

Trait Implementations

impl Binary for Flags

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

Formats the value using the given formatter.

impl BitAnd for Flags

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

Returns the intersection between the two sets of flags.

type Output = Flags

The resulting type after applying the & operator.

impl BitAndAssign for Flags

fn bitand_assign(&mut self, other: Self)

Disables all flags disabled in the set.

impl BitOr for Flags

fn bitor(self, other: Flags) -> Self

Returns the union of the two sets of flags.

type Output = Flags

The resulting type after applying the | operator.

impl BitOrAssign for Flags

fn bitor_assign(&mut self, other: Self)

Adds the set of flags.

impl BitXor for Flags

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

Returns the left flags, but with all the right flags toggled.

type Output = Flags

The resulting type after applying the ^ operator.

impl BitXorAssign for Flags

fn bitxor_assign(&mut self, other: Self)

Toggles the set of flags.

impl Clone for Flags

fn clone(&self) -> Flags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Flags

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

Formats the value using the given formatter.

impl Default for Flags

fn default() -> Flags

Returns the “default value” for a type.

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

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

Converts to this type from the input type.

impl Hash for Flags

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 LowerHex for Flags

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

Formats the value using the given formatter.

impl Not for Flags

fn not(self) -> Self

Returns the complement of this set of flags.

type Output = Flags

The resulting type after applying the ! operator.

impl Octal for Flags

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

Formats the value using the given formatter.

impl Ord for Flags

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

Restrict a value to a certain interval.

impl PartialEq for Flags

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Flags

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Scalar for Flags

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 Sub for Flags

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

Returns the set difference of the two sets of flags.

type Output = Flags

The resulting type after applying the - operator.

impl SubAssign for Flags

fn sub_assign(&mut self, other: Self)

Disables all flags enabled in the set.

impl UpperHex for Flags

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

Formats the value using the given formatter.

impl Zeroable for Flags

fn zeroed() -> Self

Calls zeroed.

impl AnyBitPattern for Flags

impl Copy for Flags

impl Eq for Flags

impl StructuralPartialEq for Flags