[−][src]Struct alacritty::renderer::Atlas
Manages a single texture atlas.
The strategy for filling an atlas looks roughly like this:
(width, height)
┌─────┬─────┬─────┬─────┬─────┐
│ 10 │ │ │ │ │ <- Empty spaces; can be filled while
│ │ │ │ │ │ glyph_height < height - row_baseline
├─────┼─────┼─────┼─────┼─────┤
│ 5 │ 6 │ 7 │ 8 │ 9 │
│ │ │ │ │ │
├─────┼─────┼─────┼─────┴─────┤ <- Row height is tallest glyph in row; this is
│ 1 │ 2 │ 3 │ 4 │ used as the baseline for the following row.
│ │ │ │ │ <- Row considered full when next glyph doesn't
└─────┴─────┴─────┴───────────┘ fit in the row.
(0, 0) x->
Fields
id: c_uint
Texture id for this atlas.
width: i32
Width of atlas.
height: i32
Height of atlas.
row_extent: i32
Left-most free pixel in a row.
This is called the extent because it is the upper bound of used pixels in a row.
row_baseline: i32
Baseline for glyphs in the current row.
row_tallest: i32
Tallest glyph in current row.
This is used as the advance when end of row is reached.
Implementations
impl Atlas
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fn new(size: i32) -> Self
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pub fn clear(&mut self)
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pub fn insert(
&mut self,
glyph: &RasterizedGlyph,
active_tex: &mut u32
) -> Result<Glyph, AtlasInsertError>
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&mut self,
glyph: &RasterizedGlyph,
active_tex: &mut u32
) -> Result<Glyph, AtlasInsertError>
Insert a RasterizedGlyph into the texture atlas.
fn insert_inner(
&mut self,
glyph: &RasterizedGlyph,
active_tex: &mut u32
) -> Glyph
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&mut self,
glyph: &RasterizedGlyph,
active_tex: &mut u32
) -> Glyph
Insert the glyph without checking for room.
Internal function for use once atlas has been checked for space. GL errors could still occur at this point if we were checking for them; hence, the Result.
fn room_in_row(&self, raw: &RasterizedGlyph) -> bool
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Check if there's room in the current row for given glyph.
fn advance_row(&mut self) -> Result<(), AtlasInsertError>
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Mark current row as finished and prepare to insert into the next row.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for Atlas
impl Send for Atlas
impl Sync for Atlas
impl Unpin for Atlas
impl UnwindSafe for Atlas
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,