textium: geometry: conversion from rusttype Rects

textium/src/geometry.rs

@@ -1,8 +1,9 @@
 //! Some generic geometry routines used in atlas packing.
 
 use std::ops::{Add, Sub, Mul};
-
+use std::convert::From;
 use num_traits::cast::NumCast;
+use rusttype;
 
 /// A rectangle.
 #[derive(Debug, Hash, Eq, PartialEq, Copy, Clone)]
@@ -66,6 +67,16 @@ impl<T> Rect<T>
     }
 }
 
+impl<T> From<rusttype::Rect<T>> for Rect<T> where T: Sub<Output=T> + Copy {
+    fn from(rect: rusttype::Rect<T>) -> Self {
+        Rect {
+            x: rect.min.x,
+            y: rect.min.y,
+            w: rect.width(),
+            h: rect.height(),
+        }
+    }
+}
 /// A 2D vector
 #[derive(Debug, Hash, Eq, PartialEq, Copy, Clone)]
 pub struct Vec2<T> {