Struct rusttype::PositionedGlyph
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pub struct PositionedGlyph<'a> { /* fields omitted */ }
A glyph augmented with positioning and scaling information. You can query such a glyph for information that depends on the scale and position of the glyph.
Methods
impl<'a> PositionedGlyph<'a>
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pub fn id(&self) -> GlyphId
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The glyph identifier for this glyph.
pub fn font(&self) -> Option<&Font<'a>>
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The font to which this glyph belongs. If the glyph is a standalone glyph that owns its resources,
it no longer has a reference to the font which it was created from (using standalone()
). In which
case, None
is returned.
pub fn unpositioned(&self) -> &ScaledGlyph<'a>
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A reference to this glyph without positioning
pub fn into_unpositioned(self) -> ScaledGlyph<'a>
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Removes the positioning from this glyph
pub fn pixel_bounding_box(&self) -> Option<Rect<i32>>
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The conservative pixel-boundary bounding box for this glyph. This is the smallest rectangle aligned to pixel boundaries that encloses the shape of this glyph at this position.
pub fn shape(&self) -> Option<Vec<Contour>>
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Similar to ScaledGlyph::shape()
, but with the position of the glyph taken into account.
pub fn scale(&self) -> Scale
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pub fn position(&self) -> Point<f32>
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pub fn draw<O: FnMut(u32, u32, f32)>(&self, o: O)
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Rasterises this glyph. For each pixel in the rect given by pixel_bounding_box()
, o
is called:
o(x, y, v)
where x
and y
are the coordinates of the pixel relative to the min
coordinates of the bounding box,
and v
is the analytically calculated coverage of the pixel by the shape of the glyph.
Calls to o
proceed in horizontal scanline order, similar to this pseudo-code:
let bb = glyph.pixel_bounding_box(); for y in 0..bb.height() { for x in 0..bb.width() { o(x, y, calc_coverage(&glyph, x, y)); } }
pub fn standalone(&self) -> PositionedGlyph<'static>
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Constructs a glyph that owns its data from this glyph. This is similar to Glyph::standalone
. See
that function for more details.
Trait Implementations
impl<'a> Clone for PositionedGlyph<'a>
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fn clone(&self) -> PositionedGlyph<'a>
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more