From 9c6b9af31abf4e2c2688db72912f8fb1f637082a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <brunobelanyi@gmail.com>
Date: Sun, 29 Mar 2020 21:23:42 +0200
Subject: [PATCH] library: render: add Renderer trait

---
 pathtracer/src/render/mod.rs       | 9 +++++++++
 pathtracer/src/render/raytracer.rs | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/pathtracer/src/render/mod.rs b/pathtracer/src/render/mod.rs
index dd37450..89cde0c 100644
--- a/pathtracer/src/render/mod.rs
+++ b/pathtracer/src/render/mod.rs
@@ -1,4 +1,13 @@
 //! Define the different kinds of renderers for use on a given scene.
+use image::RgbImage;
+
+/// Each renderer implements this trait, to be called after being built.
+pub trait Renderer {
+    /// Render the [`Scene`] using the chosen rendering technique.
+    ///
+    /// [`Scene`]: ../scene/scene/struct.Scene.html
+    fn render(&self) -> RgbImage;
+}
 
 mod raytracer;
 pub use raytracer::*;
diff --git a/pathtracer/src/render/raytracer.rs b/pathtracer/src/render/raytracer.rs
index f231189..b6c564d 100644
--- a/pathtracer/src/render/raytracer.rs
+++ b/pathtracer/src/render/raytracer.rs
@@ -1,4 +1,5 @@
 use super::utils::*;
+use super::Renderer;
 use crate::scene::{Object, Scene};
 use crate::{
     core::{LightProperties, LinearColor, ReflTransEnum},
@@ -247,3 +248,9 @@ impl Raytracer {
             .sum()
     }
 }
+
+impl Renderer for Raytracer {
+    fn render(&self) -> RgbImage {
+        self.render()
+    }
+}