textium: fonts should not own a texture

textium/src/rasterizer.rs

@@ -4,15 +4,15 @@ use rusttype;
 
 use std::collections::HashMap;
 
-use ::{FontTexture, FontAtlas, GlyphMetadata};
+use ::{FontAtlas, GlyphMetadata};
 use ::geometry::Rect;
 use ::texture::{Buffer2d, Bitmap};
 use ::packer::{Packer, GrowingPacker, SkylinePacker};
 
 /// Wraps a rusttype font and provides atlas packing and rasterization functions.
+#[derive(Clone)]
 pub struct Font<'a> {
     font: rusttype::Font<'a>,
-    texture: Option<FontTexture>,
 }
 
 #[allow(dead_code)]
@@ -21,7 +21,6 @@ impl<'a> Font<'a> {
     pub fn new(rt_font: rusttype::Font<'a>) -> Font {
         Font {
             font: rt_font,
-            texture: None,
         }
     }