Enum TextAa 

pub enum TextAa {
    Grayscale,
    None,
    LcdSubpixel,
}

How glyphs are antialiased.

TextAa::Grayscale is the oracle’s own choice on an ordinary page: the three subpixel coverages are averaged back to grey. TextAa::LcdSubpixel is reachable, but only per-draw — see its own note.

Variants

Grayscale

Grayscale coverage — the oracle’s conformance setting.

None

Hard-edged glyph fills.

LcdSubpixel

ClearType: each pixel’s three LCD stripes keep their own coverage and merge into their own destination channel, so a glyph drawn in one colour carries colour fringes.

It is not something only a caller asks for: a live edit’s text — and only that text — is drawn with ClearType on while the rest of the page is not, which is why this is a per-draw selection rather than a whole-render one. See RenderOptions::text_aa_override.

Trait Implementations

impl Clone for TextAa

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TextAa

impl Debug for TextAa

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

Formats the value using the given formatter.

impl Default for TextAa

fn default() -> Self

Returns the “default value” for a type.

impl Eq for TextAa

impl PartialEq for TextAa

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TextAa