add scale field to CustomGlyphInput

examples/custom-glyphs.rs

@@ -105,10 +105,11 @@ async fn run() {
             _ => return None,
         };
 
-        // Calculate the scale based on the "font size".
+        // Calculate the scale based on the "glyph size".
+        let glyph_size = input.size * input.scale;
         let svg_size = svg.size();
         let max_side_len = svg_size.width().max(svg_size.height());
-        let scale = input.size / max_side_len;
+        let scale = glyph_size / max_side_len;
 
         // Create a buffer to write pixels to.
         let width = (svg_size.width() * scale).ceil() as u32;

src/text_render.rs

@@ -171,6 +171,7 @@ impl TextRenderer {
                     let input = CustomGlyphInput {
                         id: glyph.id,
                         size: glyph.size,
+                        scale: text_area.scale,
                         x_bin: cache_key.x_bin,
                         y_bin: cache_key.y_bin,
                     };
@@ -537,8 +538,10 @@ fn zero_depth(_: usize) -> f32 {
 pub struct CustomGlyphInput {
     /// The unique identifier of the glyph.
     pub id: crate::CustomGlyphID,
-    /// The size of the glyph.
+    /// The size of the glyph in points (not scaled by the text area's scaling factor)
     pub size: f32,
+    /// The scaling factor applied to the text area.
+    pub scale: f32,
     /// Binning of fractional X offset
     pub x_bin: cosmic_text::SubpixelBin,
     /// Binning of fractional Y offset