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Text: note that the 1.2 line pitch was measured on one Windows install 

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Brandon Thomas 2026-10-12 17:35:13 -04:00
parent f2db8f30e7
commit 662fca6e97
1 changed files with 4 additions and 0 deletions
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crates/text/src/lib.rs
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@ -705,6 +705,10 @@ fn measure_str(face: &FontFace, size: f64, s: &str) -> (f64, Vec<(u32, f64)>) {
/// Single line spacing as a multiple of the font size. PowerPoint spaces single-spaced lines 1.2
/// times the size apart in every font (observed on twenty Latin, CJK, Thai and Indic fonts at 18
/// and 40 pt), whatever the font's own ascent and descent.
///
/// Caveat: this was measured on one Windows install of desktop PowerPoint. It may be a Windows or
/// machine setting; PowerPoint on macOS or the web may space lines by the font's own metrics.
/// Keep it a single tunable value, and re-measure on the other platform before changing it.
const LINE_PITCH: f64 = 1.2;
/// A line's height above and below the baseline at `size`: [`LINE_PITCH`] × size, split where