Struct write_fonts::tables::cmap::Cmap4

pub struct Cmap4 {
    pub length: u16,
    pub language: u16,
    pub seg_count_x2: u16,
    pub search_range: u16,
    pub entry_selector: u16,
    pub range_shift: u16,
    pub end_code: Vec<u16>,
    pub start_code: Vec<u16>,
    pub id_delta: Vec<i16>,
    pub id_range_offsets: Vec<u16>,
    pub glyph_id_array: Vec<u16>,
}

cmap Format 4: Segment mapping to delta values

Fields

length: u16

This is the length in bytes of the subtable.

language: u16

For requirements on use of the language field, see “Use of the language field in ‘cmap’ subtables” in this document.

seg_count_x2: u16

2 × segCount.

search_range: u16

Maximum power of 2 less than or equal to segCount, times 2 ((2floor(log2(segCount))) * 2, where “” is an exponentiation operator)

entry_selector: u16

Log2 of the maximum power of 2 less than or equal to numTables (log2(searchRange/2), which is equal to floor(log2(segCount)))

range_shift: u16

segCount times 2, minus searchRange ((segCount * 2) - searchRange)

end_code: Vec<u16>

End characterCode for each segment, last=0xFFFF.

start_code: Vec<u16>

Start character code for each segment.

id_delta: Vec<i16>

Delta for all character codes in segment.

id_range_offsets: Vec<u16>

Offsets into glyphIdArray or 0

glyph_id_array: Vec<u16>

Glyph index array (arbitrary length)

Implementations

impl Cmap4

pub fn new( length: u16, language: u16, seg_count_x2: u16, search_range: u16, entry_selector: u16, range_shift: u16, end_code: Vec<u16>, start_code: Vec<u16>, id_delta: Vec<i16>, id_range_offsets: Vec<u16>, glyph_id_array: Vec<u16> ) -> Self

Construct a new Cmap4

Trait Implementations

impl Clone for Cmap4

fn clone(&self) -> Cmap4

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Cmap4

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

Formats the value using the given formatter.

impl Default for Cmap4

fn default() -> Cmap4

Returns the “default value” for a type.

impl<'a> FontRead<'a> for Cmap4

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

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

impl FontWrite for Cmap4

fn write_into(&self, writer: &mut TableWriter)

Write our data and information about offsets into this TableWriter.

fn table_type(&self) -> TableType

The type of this table.

impl From<Cmap4> for CmapSubtable

fn from(src: Cmap4) -> CmapSubtable

Converts to this type from the input type.

impl Hash for Cmap4

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 Cmap4

fn cmp(&self, other: &Cmap4) -> 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 Cmap4

fn eq(&self, other: &Cmap4) -> 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 Cmap4

fn partial_cmp(&self, other: &Cmap4) -> 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 Validate for Cmap4

fn validate_impl(&self, _ctx: &mut ValidationCtx)

Validate this table.

fn validate(&self) -> Result<(), ValidationReport>

Ensure that this table is well-formed, reporting any errors.

impl Eq for Cmap4

impl StructuralEq for Cmap4

impl StructuralPartialEq for Cmap4