From 69b77db71642e26b77aa54b89884d7e237dc414f Mon Sep 17 00:00:00 2001
From: Jonathan Flueren <jonathan.flueren@tu-dortmund.de>
Date: Thu, 5 May 2022 13:19:56 +0200
Subject: [PATCH] use image library to output other formats

---
 Cargo.lock   | 589 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml   |   1 +
 src/color.rs |  11 +-
 src/main.rs  |  23 +-
 4 files changed, 613 insertions(+), 11 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 4309644..359aa4a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,595 @@
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+name = "weezl"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c97e489d8f836838d497091de568cf16b117486d529ec5579233521065bd5e4"
diff --git a/Cargo.toml b/Cargo.toml
index 813dcf9..c91bb34 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+image = "0.24.2"
\ No newline at end of file
diff --git a/src/color.rs b/src/color.rs
index baf2c2a..a9d8bcd 100644
--- a/src/color.rs
+++ b/src/color.rs
@@ -1,7 +1,7 @@
-use super::Color;
+use super::{Color, Rgb, RgbImage};
 use std::io::Write;
 
-pub fn write_color(out: &mut impl Write, pixel_color: Color) {
+pub fn write_color(out: &mut impl Write, pixel_color: &Color) {
     write!(
         out,
         "{} {} {}\n",
@@ -11,3 +11,10 @@ pub fn write_color(out: &mut impl Write, pixel_color: Color) {
     )
     .unwrap();
 }
+
+pub fn put_color(img: &mut RgbImage, pixel_color: &Color, x: u32, y: u32) {
+    img.put_pixel(x, y, Rgb(
+        [(255.999 * pixel_color.x()) as u8,
+        (255.999 * pixel_color.y()) as u8,
+        (255.999 * pixel_color.z()) as u8]));
+}
diff --git a/src/main.rs b/src/main.rs
index 54f36e8..b0e9c4a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,21 +1,20 @@
+extern crate image;
+
 mod color;
 mod hittable;
 mod hittable_list;
 mod ray;
 mod vec3;
 mod utility;
-use ray::Ray;
 use std::env;
 use std::fs::File;
 use std::io::BufWriter;
 use std::io::Write;
-use vec3::Color;
-use vec3::Point3;
-use vec3::Vec3;
-use hittable::Hittable;
-use hittable::Sphere;
+use vec3::{Color, Point3, Vec3};
+use hittable::{Hittable, Sphere, HitRecord};
 use hittable_list::HittableList;
-use hittable::HitRecord;
+use ray::Ray;
+use image::{ImageBuffer, Rgb, RgbImage};
 
 fn hit_sphere(center: &Point3, radius: f64, r: &Ray) -> f64 {
     let oc = r.origin() - *center;
@@ -49,7 +48,7 @@ fn main() {
     // Image
     let aspect_ratio = 16.0 / 9.0;
     let image_width = 1000;
-    let image_height = (image_width as f64 / aspect_ratio) as u64;
+    let image_height = (image_width as f64 / aspect_ratio) as u32;
 
     // World
     let mut world = HittableList::new();
@@ -72,6 +71,9 @@ fn main() {
     if args.len() > 1 && args[1] != "" {
         default_file = &args[1];
     }
+
+    //let mut image = RgbImage::new(image_width, image_height);
+
     let mut file = BufWriter::new(File::create(default_file).unwrap());
     writeln!(&mut file, "P3\n{image_width} {image_height}\n255\n").unwrap();
 
@@ -86,8 +88,11 @@ fn main() {
             );
             let pixel_color = ray_color(&r, &mut world);
 
-            color::write_color(&mut file, pixel_color);
+            color::write_color(&mut file, &pixel_color);
+            //color::put_color(&mut image, &pixel_color, image_width-i-1, image_height-j-1);
+
         }
     }
+    //image.save(default_file).unwrap();
     eprintln!("\nDone!");
 }