feat: add rainbow effect

Cargo.lock

@@ -49,6 +49,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bracket-color"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c1d1b160817fb74eebedccd678055cd688d1a73dc1a14519fa30ff4c9a5bdee"
+
 [[package]]
 name = "bumpalo"
 version = "3.10.0"
@@ -662,6 +668,7 @@ name = "splink_client"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "bracket-color",
  "clap",
  "image",
  "rand",

Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.57"
+bracket-color = "0.8.2"
 clap = { version = "3.1.18", features = ["derive", "deprecated"] }
 image = "0.24.2"
 rand = "0.8.5"

src/main.rs

@@ -10,6 +10,7 @@ use std::{
     time::Duration,
 };
 
+use bracket_color::prelude::{HSV, RGB};
 use clap::{Parser, Subcommand};
 use image::{Pixel, Rgb, RgbImage};
 use rand::Rng;
@@ -78,6 +79,7 @@ impl From<Color> for Rgb<u8> {
 
 #[derive(Clone, Debug, PartialEq, Eq, Subcommand)]
 enum Action {
+    Rainbow,
     Solid { color: Color },
     Clear,
 }
@@ -122,6 +124,24 @@ fn get_frame(layout: Layout, frame: u32) -> RgbImage {
     })
 }
 
+fn rainbow(layout: Layout, frame: u32) -> RgbImage {
+    #![allow(
+        clippy::cast_precision_loss,
+        clippy::cast_lossless,
+        clippy::cast_possible_truncation,
+        clippy::cast_sign_loss
+    )]
+
+    let w = layout.width_px();
+    let h = layout.height_px();
+
+    RgbImage::from_fn(w, h, |x, y| {
+        let RGB { r, g, b } =
+            HSV::from_f32((x + y + frame) as f32 / 100.0 % 1.0, 1.0, 0.1).to_rgb();
+        Rgb([(r * 255.0) as u8, (g * 255.0) as u8, (b * 255.0) as u8])
+    })
+}
+
 fn print_image(image: &RgbImage) {
     let _hide = termion::cursor::HideCursor::from(stdout());
 
@@ -170,6 +190,20 @@ fn main() -> anyhow::Result<()> {
             let frame_num: u32 = rand::thread_rng().gen();
             send_frame(&socket, layout, frame_num, &image)?;
         }
+        Action::Rainbow => {
+            print!("{}", termion::clear::All);
+
+            for frame in 0.. {
+                let image = rainbow(layout, frame);
+
+                print_image(&image);
+
+                let frame_num: u32 = rand::thread_rng().gen();
+                send_frame(&socket, layout, frame_num, &image)?;
+
+                sleep(Duration::from_millis(16));
+            }
+        }
     }
 
     Ok(())