ft: 2.1+2.2: image output

src/main.rs

@@ -0,0 +1,23 @@
+fn main() {
+    let image_width = 256;
+    let image_height = 256;
+
+    let mut imgbuf = image::ImageBuffer::new(image_width, image_height);
+
+    for j in 0..image_height {
+        for i in 0..image_width {
+            let r = i as f32 / (image_width - 1) as f32;
+            let g = j as f32 / (image_height - 1) as f32;
+            let b = 0.0;
+
+            let ir = (255.599 * r) as u8;
+            let ig = (255.599 * g) as u8;
+            let ib = (255.599 * b) as u8;
+
+            let pixel = imgbuf.get_pixel_mut(i, j);
+            *pixel = image::Rgb([ir, ig, ib]);
+        }
+    }
+
+    imgbuf.save("output.png").unwrap();
+}