Struct fonts::GlyphStore

pub struct GlyphStore {
    entry_buffer: Vec<GlyphEntry>,
    detail_store: DetailedGlyphStore,
    total_advance: Au,
    total_word_separators: usize,
    has_detailed_glyphs: bool,
    is_whitespace: bool,
    ends_with_whitespace: bool,
    is_single_preserved_newline: bool,
    is_rtl: bool,
}

Stores the glyph data belonging to a text run.

Simple glyphs are stored inline in the entry_buffer, detailed glyphs are stored as pointers into the detail_store.

+- GlyphStore --------------------------------+
|               +---+---+---+---+---+---+---+ |
| entry_buffer: |   | s |   | s |   | s | s | |  d = detailed
|               +-|-+---+-|-+---+-|-+---+---+ |  s = simple
|                 |       |       |           |
|                 |   +---+-------+           |
|                 |   |                       |
|               +-V-+-V-+                     |
| detail_store: | d | d |                     |
|               +---+---+                     |
+---------------------------------------------+

Fields

entry_buffer: Vec<GlyphEntry>

A buffer of glyphs within the text run, in the order in which they appear in the input text. Any changes will also need to be reflected in transmute_entry_buffer_to_u32_buffer().

detail_store: DetailedGlyphStore

A store of the detailed glyph data. Detailed glyphs contained in the entry_buffer point to locations in this data structure.

total_advance: Au

A cache of the advance of the entire glyph store.

total_word_separators: usize

A cache of the number of word separators in the entire glyph store. See https://drafts.csswg.org/css-text/#word-separator.

has_detailed_glyphs: bool

Used to check if fast path should be used in glyph iteration.

is_whitespace: bool

Whether or not this glyph store contains only glyphs for whitespace.

ends_with_whitespace: bool

Whether or not this glyph store ends with whitespace glyphs. Typically whitespace glyphs are placed in a separate store, but that may not be the case with white-space: break-spaces.

is_single_preserved_newline: bool

Whether or not this glyph store contains only a single glyph for a single preserved newline.

is_rtl: bool

Implementations

impl<'a> GlyphStore

pub fn new( length: usize, is_whitespace: bool, ends_with_whitespace: bool, is_single_preserved_newline: bool, is_rtl: bool, ) -> GlyphStore

Initializes the glyph store, but doesn’t actually shape anything.

Use the add_* methods to store glyph data.

pub fn total_advance(&self) -> Au

pub fn len(&self) -> ByteIndex

pub fn is_whitespace(&self) -> bool

pub fn ends_with_whitespace(&self) -> bool

pub fn total_word_separators(&self) -> usize

pub fn finalize_changes(&mut self)

fn cache_total_advance_and_word_separators(&mut self)

pub fn add_glyph_for_byte_index( &mut self, i: ByteIndex, character: char, data: &GlyphData, )

Adds a single glyph.

pub fn add_glyphs_for_byte_index( &mut self, i: ByteIndex, data_for_glyphs: &[GlyphData], )

pub fn iter_glyphs_for_byte_range( &self, range: &Range<ByteIndex>, ) -> impl Iterator<Item = GlyphInfo<'_>>

pub fn range_index_of_advance( &self, range: &Range<ByteIndex>, advance: Au, extra_word_spacing: Au, ) -> (usize, Au)

pub fn advance_for_byte_range( &self, range: &Range<ByteIndex>, extra_word_spacing: Au, ) -> Au

pub fn advance_for_byte_range_simple_glyphs( &self, range: &Range<ByteIndex>, extra_word_spacing: Au, ) -> Au

pub fn char_is_word_separator(&self, i: ByteIndex) -> bool

pub fn word_separator_count_in_range(&self, range: &Range<ByteIndex>) -> u32

Trait Implementations

impl Clone for GlyphStore

fn clone(&self) -> GlyphStore

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for GlyphStore

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for GlyphStore

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl MallocSizeOf for GlyphStore

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl Serialize for GlyphStore

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.