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# Replace ab_glyph with the more capable cosmic-text Fixes #7616. Cosmic-text is a more mature text-rendering library that handles scripts and ligatures better than ab_glyph, it can also handle system fonts which can be implemented in bevy in the future Rebase of https://github.com/bevyengine/bevy/pull/8808 ## Changelog Replaces text renderer ab_glyph with cosmic-text The definition of the font size has changed with the migration to cosmic text. The behavior is now consistent with other platforms (e.g. the web), where the font size in pixels measures the height of the font (the distance between the top of the highest ascender and the bottom of the lowest descender). Font sizes in your app need to be rescaled to approximately 1.2x smaller; for example, if you were using a font size of 60.0, you should now use a font size of 50.0. ## Migration guide - `Text2dBounds` has been replaced with `TextBounds`, and it now accepts `Option`s to the bounds, instead of using `f32::INFINITY` to inidicate lack of bounds - Textsizes should be changed, dividing the current size with 1.2 will result in the same size as before. - `TextSettings` struct is removed - Feature `subpixel_alignment` has been removed since cosmic-text already does this automatically - TextBundles and things rendering texts requires the `CosmicBuffer` Component on them as well ## Suggested followups: - TextPipeline: reconstruct byte indices for keeping track of eventual cursors in text input - TextPipeline: (future work) split text entities into section entities - TextPipeline: (future work) text editing - Support line height as an option. Unitless `1.2` is the default used in browsers (1.2x font size). - Support System Fonts and font families - Example showing of animated text styles. Eg. throbbing hyperlinks --------- Co-authored-by: tigregalis <anak.harimau@gmail.com> Co-authored-by: Nico Burns <nico@nicoburns.com> Co-authored-by: sam edelsten <samedelsten1@gmail.com> Co-authored-by: Dimchikkk <velo.app1@gmail.com> Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: Rob Parrett <robparrett@gmail.com> |
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Bevy Text
