From 06bb73cac56ac19b46e6d9de1bd3dad6a22ea5d3 Mon Sep 17 00:00:00 2001
From: Greg Burri <greg.burri@gmail.com>
Date: Tue, 18 Apr 2023 23:51:01 +0200
Subject: [PATCH] Move the parameters to the main module

---
 .gitignore   |  1 +
 src/main.rs  | 11 ++++++++++-
 src/rayon.rs | 17 +++++++++--------
 3 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/.gitignore b/.gitignore
index ea8c4bf..e39cff4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /target
+*.png
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 15aa600..ca724fa 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,10 +1,19 @@
 use std::thread;
 
+use num::Complex;
+
 mod rayon;
 
 fn main() {
     // spawn_and_join();
-    rayon::mandelbrot();
+
+    rayon::mandelbrot(
+        1920,
+        1080,
+        Complex { re: -1.2, im: 0.35 },
+        Complex { re: -1.0, im: 0.2 },
+        "output.png",
+    );
 }
 
 // Page 500.
diff --git a/src/rayon.rs b/src/rayon.rs
index 7d3e259..9ef6fc3 100644
--- a/src/rayon.rs
+++ b/src/rayon.rs
@@ -1,18 +1,19 @@
-use std::fs::File;
+use std::{fs::File, ops::DerefMut};
 
 use image::{codecs::png::PngEncoder, ColorType, ImageEncoder};
 use num::Complex;
 use rayon::prelude::{IntoParallelIterator, ParallelIterator};
 
 // Page 508.
-pub fn mandelbrot() {
+pub fn mandelbrot(
+    width: usize,
+    height: usize,
+    upper_left: Complex<f64>,
+    lower_right: Complex<f64>,
+    filename: &str,
+) {
     println!("===== rayon =====");
 
-    let width = 1920;
-    let height = 1080;
-    let upper_left = Complex { re: -1.2, im: 0.35 };
-    let lower_right = Complex { re: -1.0, im: 0.2 };
-
     let mut pixels = vec![0; width * height];
     let bands: Vec<(usize, &mut [u8])> = pixels.chunks_mut(width).enumerate().collect();
 
@@ -25,7 +26,7 @@ pub fn mandelbrot() {
         render(band, band_bounds, band_upper_left, band_lower_right);
     });
 
-    write_image("output.png", &pixels, (width, height)).unwrap();
+    write_image(filename, &pixels, (width, height)).unwrap();
 }
 
 // page 32.
-- 
2.45.2