Make matrices, points, rects, side offsets, and sizes serializable using

`serde`.

This is preparation for multiprocess Servo.

Cargo.toml

@@ -11,3 +11,5 @@ rustc-serialize = "0.3.2"
 rand = "0.3.7"
 num = "0.1.24"
 log = "0.3.1"
+serde = "*"
+serde_macros = "*"

src/lib.rs

@@ -7,11 +7,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(asm, simd, zero_one, test)]
+#![feature(asm, custom_derive, plugin, simd, zero_one, test)]
+
+#![plugin(serde_macros)]
 
 #[macro_use]
 extern crate log;
 extern crate rustc_serialize;
+extern crate serde;
 
 extern crate rand;
 extern crate test;

src/matrix.rs

@@ -11,7 +11,7 @@ use approxeq::ApproxEq;
 use point::{Point2D, Point4D};
 
 
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Deserialize, Serialize)]
 pub struct Matrix4 {
     pub m11: f32, pub m12: f32, pub m13: f32, pub m14: f32,
     pub m21: f32, pub m22: f32, pub m23: f32, pub m24: f32,

src/point.rs

@@ -15,7 +15,7 @@ use num_lib::NumCast;
 use std::fmt::{self, Formatter};
 use std::ops::{Add, Neg, Mul, Sub, Div};
 
-#[derive(Clone, Copy, RustcDecodable, RustcEncodable, Eq, Hash, PartialEq)]
+#[derive(Clone, Copy, RustcDecodable, RustcEncodable, Eq, Hash, PartialEq, Deserialize, Serialize)]
 pub struct Point2D<T> {
     pub x: T,
     pub y: T

src/rect.rs

@@ -17,7 +17,7 @@ use std::cmp::PartialOrd;
 use std::fmt::{self, Formatter};
 use std::ops::{Add, Sub, Mul, Div};
 
-#[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq)]
+#[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq, Deserialize, Serialize)]
 pub struct Rect<T> {
     pub origin: Point2D<T>,
     pub size: Size2D<T>,

src/side_offsets.rs

@@ -15,7 +15,7 @@ use std::ops::Add;
 
 /// A group of side offsets, which correspond to top/left/bottom/right for borders, padding,
 /// and margins in CSS.
-#[derive(Clone, Copy, PartialEq, Debug)]
+#[derive(Clone, Copy, PartialEq, Debug, Deserialize, Serialize)]
 pub struct SideOffsets2D<T> {
     pub top: T,
     pub right: T,

src/size.rs

@@ -14,7 +14,7 @@ use num_lib::NumCast;
 use std::fmt::{self, Formatter};
 use std::ops::{Mul, Div};
 
-#[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq)]
+#[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq, Deserialize, Serialize)]
 pub struct Size2D<T> {
     pub width: T,
     pub height: T