Print random easter egg

Cargo.lock

@@ -1388,6 +1388,7 @@ dependencies = [
  "rand",
  "rust-embed",
  "serde",
+ "showbits-assets",
  "showbits-common",
  "taffy",
  "time",

showbits-assets/src/lib.rs

@@ -3,3 +3,14 @@ pub const UNIFONT_JP: &[u8] = include_bytes!("../data/unifont_jp-15.1.05.otf");
 pub const UNIFONT_UPPER: &[u8] = include_bytes!("../data/unifont_upper-15.1.05.otf");
 pub const UNIFONT_NAME: &str = "Unifont";
 pub const UNIFONT_SIZE: f32 = 16.0;
+
+pub const EGG_COVER: &[u8] = include_bytes!("../data/egg_cover.png");
+pub const EGG_PATTERNS: &[&[u8]] = &[
+    include_bytes!("../data/egg_pattern_0.png"),
+    include_bytes!("../data/egg_pattern_1.png"),
+    include_bytes!("../data/egg_pattern_2.png"),
+    include_bytes!("../data/egg_pattern_3.png"),
+    include_bytes!("../data/egg_pattern_4.png"),
+    include_bytes!("../data/egg_pattern_5.png"),
+    include_bytes!("../data/egg_pattern_6.png"),
+];

showbits-thermal-printer/Cargo.toml

@@ -15,6 +15,7 @@ palette.workspace = true
 rand = "0.8.5"
 rust-embed = "8.3.0"
 serde = { version = "1.0.197", features = ["derive"] }
+showbits-assets.workspace = true
 showbits-common.workspace = true
 taffy.workspace = true
 time = "0.3.34"

showbits-thermal-printer/src/drawer.rs

@@ -1,6 +1,7 @@
 mod calendar;
 mod cells;
 mod chat_message;
+mod egg;
 mod image;
 mod photo;
 mod text;
@@ -12,7 +13,7 @@ use crate::printer::Printer;
 
 pub use self::{
     calendar::CalendarDrawing, cells::CellsDrawing, chat_message::ChatMessageDrawing,
-    image::ImageDrawing, photo::PhotoDrawing, text::TextDrawing,
+    egg::EggDrawing, image::ImageDrawing, photo::PhotoDrawing, text::TextDrawing,
 };
 
 #[derive(Default)]

showbits-thermal-printer/src/drawer/egg.rs

@@ -0,0 +1,82 @@
+use image::{imageops, RgbaImage};
+use rand::Rng;
+use showbits_assets::{EGG_COVER, EGG_PATTERNS};
+use showbits_common::{
+    color::{self, WHITE},
+    widgets::{Image, Text},
+    Node, Tree, WidgetExt,
+};
+use taffy::{style_helpers::percent, AlignItems, Display, FlexDirection};
+
+use crate::printer::Printer;
+
+use super::{Context, Drawing};
+
+pub struct EggDrawing;
+
+fn load_image(bytes: &[u8]) -> anyhow::Result<RgbaImage> {
+    Ok(image::load_from_memory(bytes)?.into_rgba8())
+}
+
+impl Drawing for EggDrawing {
+    fn draw(&self, printer: &mut Printer, ctx: &mut Context) -> anyhow::Result<()> {
+        // Load image data from memory
+        let cover = load_image(EGG_COVER)?;
+        let mut patterns = vec![];
+        for pattern in EGG_PATTERNS {
+            patterns.push(load_image(pattern)?);
+        }
+
+        // Prepare egg image
+        let mut image =
+            RgbaImage::from_pixel(cover.width(), cover.height(), color::to_image_color(WHITE));
+
+        // Draw patterns onto egg
+        let mut last_idx = None;
+        let mut y = rand::thread_rng().gen_range(-100_i64..0);
+        while y < image.height().into() {
+            let idx = loop {
+                let idx = rand::thread_rng().gen_range(0..patterns.len());
+                if Some(idx) != last_idx {
+                    break idx;
+                }
+            };
+
+            let paint = &patterns[idx];
+            imageops::overlay(&mut image, paint, 0, y);
+            y += <_ as Into<i64>>::into(paint.height());
+            last_idx = Some(idx);
+        }
+
+        // Finally, draw the cover
+        imageops::overlay(&mut image, &cover, 0, 0);
+
+        let mut tree = Tree::<Context>::new(WHITE);
+
+        let image = Image::new(image)
+            .with_grow(false)
+            .with_shrink(false)
+            .node()
+            .register(&mut tree)?;
+
+        let text = Text::new()
+            .with_metrics(Text::default_metrics().scale(2.0))
+            .and_plain("Frohe Ostern!")
+            .widget(&mut ctx.font_stuff)
+            .node()
+            .register(&mut tree)?;
+
+        let root = Node::empty()
+            .with_size_width(percent(1.0))
+            .with_display(Display::Flex)
+            .with_flex_direction(FlexDirection::Column)
+            .with_align_items(Some(AlignItems::Center))
+            .and_child(image)
+            .and_child(text)
+            .register(&mut tree)?;
+
+        printer.print_tree(&mut tree, ctx, root)?;
+        printer.feed()?;
+        Ok(())
+    }
+}

showbits-thermal-printer/src/server.rs

@@ -13,8 +13,8 @@ use serde::Deserialize;
 use tokio::{net::TcpListener, sync::mpsc};
 
 use crate::drawer::{
-    CalendarDrawing, CellsDrawing, ChatMessageDrawing, Command, ImageDrawing, PhotoDrawing,
-    TextDrawing,
+    CalendarDrawing, CellsDrawing, ChatMessageDrawing, Command, EggDrawing, ImageDrawing,
+    PhotoDrawing, TextDrawing,
 };
 
 use self::{r#static::get_static_file, statuscode::status_code};
@@ -29,6 +29,7 @@ pub async fn run(tx: mpsc::Sender<Command>, addr: String) -> anyhow::Result<()>
         .route("/calendar", post(post_calendar))
         .route("/cells", post(post_cells))
         .route("/chat_message", post(post_chat_message))
+        .route("/egg", post(post_egg))
         .route("/image", post(post_image).fallback(get_static_file))
         .route("/photo", post(post_photo).fallback(get_static_file))
         .route("/text", post(post_text))
@@ -97,6 +98,12 @@ async fn post_chat_message(server: State<Server>, request: Form<PostChatMessageF
         .await;
 }
 
+// /egg
+
+async fn post_egg(server: State<Server>) {
+    let _ = server.tx.send(Command::draw(EggDrawing)).await;
+}
+
 // /image
 
 async fn post_image(server: State<Server>, mut multipart: Multipart) -> somehow::Result<Response> {