Refactor darwin code

The ascent calculation on darwin was more complicated than it needed to
be. By running a `.ceil()` instead of adding one, checking if it's 0,
substracting if it is, and then flooring it, a few instructions could be
shaved off.

1 files changed, 3 insertions, 5 deletions

diff --git a/font/src/darwin/mod.rs b/font/src/darwin/mod.rs
index 56685dd5..7dde899a 100644
--- a/font/src/darwin/mod.rs
+++ b/font/src/darwin/mod.rs
@@ -475,13 +475,11 @@ impl Font {
                 // Get the top of the bounding box
                 let metrics = self.metrics();
                 let height = metrics.line_height;
-                let mut ascent = height - self.ct_font.descent() + 1.;
-                if ascent.floor() == ascent {
-                    // Fix off-by-one with an exact X.0 ascent
-                    ascent -= 1.;
-                }
+                let ascent = (height - self.ct_font.descent()).ceil();
+
                 // Get the width of the cell
                 let width = self.glyph_advance('0') as i32;
+
                 // Return the new custom glyph
                 if character == super::BEAM_CURSOR_CHAR {
                     return super::get_beam_cursor_glyph(ascent as i32, height as i32, width);