fonts: remove some unused code and fixup some warnings

src/font/locator/mod.rs

@@ -18,8 +18,15 @@ pub mod font_loader;
 /// collection if the data represents a collection of
 /// fonts.
 pub enum FontDataHandle {
-    OnDisk { path: PathBuf, index: u32 },
-    Memory { data: Vec<u8>, index: u32 },
+    OnDisk {
+        path: PathBuf,
+        index: u32,
+    },
+    #[allow(dead_code)]
+    Memory {
+        data: Vec<u8>,
+        index: u32,
+    },
 }
 
 impl std::fmt::Debug for FontDataHandle {

src/font/units.rs

@@ -1,38 +1,3 @@
-use euclid::{Length, Scale};
-
 pub type PixelUnit = window::PixelUnit;
-pub struct FontUnit;
-pub struct PointUnit;
-pub struct EMUnit;
-
-/// The length of a side of the imaginary EM square
-/// which sets the resolution of a glyph.
-/// eg: an EMSize of 2048 means that there are 2048
-/// FontUnit's per em square.
-/// 1em corresponds to the selected point size of a font.
-pub type EMSize = Length<usize, EMUnit>;
-
-/// A dimension expressed in font coordinates.
-/// For example, if the EMSize is 2000 and we have a FontLength
-/// of 500, it represents 500/2000 or 1/4 of the nominal size
-/// of a glyph.
-pub type FontLength = Length<isize, FontUnit>;
-
-/// Describes a distance measured in points.
-pub type PointLength = Length<f64, PointUnit>;
-
-/// Returns the scaling factor required to convert from
-/// points to pixels at a given dpi; multiply a `PointLength` by
-/// this to produce a `PixelLength`
-pub fn pixels_per_point(dpi: u32) -> Scale<f64, PointUnit, PixelUnit> {
-    Scale::new(dpi as f64 / 72.)
-}
-
-/// Returns the scaling factor required to convert from
-/// font units in a particular font to points.
-pub fn units_per_em(units_per_em: EMSize) -> Scale<f64, FontUnit, PointUnit> {
-    Scale::new(1.0 / units_per_em.get() as f64)
-}
-
 pub type PixelLength = euclid::Length<f64, PixelUnit>;
-pub type IntPixelLength = isize; // euclid::Length<isize, PixelUnit>;
+pub type IntPixelLength = isize;

window/src/bitmaps/atlas.rs

@@ -66,8 +66,6 @@ where
         // We pad each sprite reservation with blank space to avoid
         // surprising and unexpected artifacts when the texture is
         // interpolated on to the render surface.
-        // In addition, we need to ensure that the bottom left pixel
-        // is blank as we use that for whitespace glyphs.
         let reserve_width = width + 2;
         let reserve_height = height + 2;