add Into<ggez::Rect> for our internal Rect<T>

src/common.rs

@@ -1,4 +1,4 @@
-use num_traits::Num;
+use num_traits::{Num, AsPrimitive};
 
 use crate::bitfield;
 
@@ -215,3 +215,12 @@ impl<T: Num + Copy> Rect<T> {
         }
     }
 }
+
+impl<T: Num + Copy + AsPrimitive<f32>> Into<crate::ggez::graphics::Rect> for Rect<T> {
+    fn into(self) -> crate::ggez::graphics::Rect {
+        crate::ggez::graphics::Rect::new(self.top.as_(),
+                                         self.left.as_(),
+                                         self.bottom.sub(self.top).as_(),
+                                         self.right.sub(self.left).as_())
+    }
+}