Struct GlyphEntry 

pub struct GlyphEntry {
    value: u32,
}

GlyphEntry is a port of Gecko’s CompressedGlyph scheme for storing glyph data compactly.

In the common case (reasonable glyph advances, no offsets from the font em-box, and one glyph per character), we pack glyph advance, glyph id, and some flags into a single u32.

In the uncommon case (multiple glyphs per unicode character, large glyph index/advance, or glyph offsets), we create a DetailedGlyphEntry for the glyph and pack its index into the GlyphEntry.

Fields

value: u32

Implementations

impl GlyphEntry

fn new(value: u32) -> GlyphEntry

fn simple(id: u32, advance: Au) -> GlyphEntry

fn complex(detailed_glyph_index: usize) -> GlyphEntry

impl GlyphEntry

fn advance(&self) -> Au

fn id(&self) -> u32

fn char_is_word_separator(&self) -> bool

True if the original character was a word separator. These include spaces (U+0020), non-breaking spaces (U+00A0), and a few other characters non-exhaustively listed in the specification. Other characters may map to the same glyphs, but this function does not take mapping into account.

See https://drafts.csswg.org/css-text/#word-separator.

fn set_char_is_word_separator(&mut self)

fn detailed_glyph_index(&self) -> usize

fn is_simple(&self) -> bool

fn has_flag(&self, flag: u32) -> bool

Trait Implementations

impl Clone for GlyphEntry

fn clone(&self) -> GlyphEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GlyphEntry

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

Formats the value using the given formatter.

impl MallocSizeOf for GlyphEntry

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 PartialEq for GlyphEntry

fn eq(&self, other: &GlyphEntry) -> 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 Copy for GlyphEntry

impl StructuralPartialEq for GlyphEntry