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Implement subpixel glyph positioning and scaling

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The latest `cosmic-text` release performs bucketing calculations after
layouting. This allows us to provide proper subpixel offsets, as well as
scale any buffer thanks to its linear layout properties.

See https://github.com/pop-os/cosmic-text/pull/143.
This commit is contained in:
Héctor Ramón Jiménez 2023-06-20 06:08:41 +02:00 • committed by Josh Groves
parent 595e09a497
commit 81dedbd042
4 changed files with 34 additions and 19 deletions
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9
src/lib.rs
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@ -19,7 +19,8 @@ pub use cosmic_text::{
self, fontdb, Action, Affinity, Attrs, AttrsList, AttrsOwned, Buffer, BufferLine, CacheKey,
Color, Command, Cursor, Edit, Editor, Family, FamilyOwned, Font, FontSystem, LayoutCursor,
LayoutGlyph, LayoutLine, LayoutRun, LayoutRunIter, Metrics, ShapeGlyph, ShapeLine, ShapeSpan,
ShapeWord, Stretch, Style, SubpixelBin, SwashCache, SwashContent, SwashImage, Weight, Wrap,
ShapeWord, Shaping, Stretch, Style, SubpixelBin, SwashCache, SwashContent, SwashImage, Weight,
Wrap,
};
use etagere::AllocId;
@ -101,9 +102,11 @@ pub struct TextArea<'a> {
/// The buffer containing the text to be rendered.
pub buffer: &'a Buffer,
/// The left edge of the buffer.
pub left: i32,
pub left: f32,
/// The top edge of the buffer.
pub top: i32,
pub top: f32,
/// The scaling to apply to the buffer.
pub scale: f32,
/// The visible bounds of the text area. This is used to clip the text and doesn't have to
/// match the `left` and `top` values.
pub bounds: TextBounds,