From 4eb8bde10a77f3d3eae9b83afc68d5cbb0edbddb Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Fri, 10 Jul 2015 16:05:30 -0700
Subject: [PATCH] Add serde serialization support.

Necessary for multiprocess Servo.
---
 Cargo.toml | 13 +++++++++++++
 src/lib.rs |  8 +++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 44d7c4d..7d77fa6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,5 +14,18 @@ path = "png-sys"
 [dependencies]
 libc = "0.1.5"
 
+[dependencies.serde]
+version = "*"
+optional = true
+
+[dependencies.serde_macros]
+version = "*"
+optional = true
+
 [build-dependencies]
 gcc = "0.3.4"
+
+[features]
+serde-serialization = [ "serde", "serde_macros" ]
+
+
diff --git a/src/lib.rs b/src/lib.rs
index 0eba0fd..c632e96 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,9 +9,14 @@
 
 #![crate_name = "png"]
 #![crate_type = "rlib"]
+#![cfg_attr(feature="serde-serialization", feature(custom_derive, plugin))]
+#![cfg_attr(feature="serde-serialization", plugin(serde_macros))]
 
 extern crate libc;
 
+#[cfg(feature="serde-serialization")]
+extern crate serde;
+
 use libc::{c_int, size_t};
 use std::error::Error;
 use std::fs::File;
@@ -24,7 +29,7 @@ use std::slice;
 
 pub mod ffi;
 
-
+#[cfg_attr(feature="serde-serialization", derive(Deserialize, Serialize))]
 pub enum PixelsByColorType {
     K8(Vec<u8>),
     KA8(Vec<u8>),
@@ -32,6 +37,7 @@ pub enum PixelsByColorType {
     RGBA8(Vec<u8>),
 }
 
+#[cfg_attr(feature="serde-serialization", derive(Deserialize, Serialize))]
 pub struct Image {
     pub width: u32,
     pub height: u32,