introduce windows app icons

neothesia/Cargo.toml

@@ -47,3 +47,7 @@ iced_widget = { git = "https://github.com/iced-rs/iced.git", rev="fc285d3e461626
 
 [[bin]]
 name = "neothesia"
+
+[target.'cfg(target_os = "windows")'.build-dependencies]
+image = "0.24"
+embed-resource = "2.4.0"

neothesia/build.rs

@@ -0,0 +1,27 @@
+fn main() {
+    #[cfg(target_os = "windows")]
+    {
+        use image::io::Reader as ImageReader;
+        use std::{
+            env,
+            fs::File,
+            path::{Path, PathBuf},
+        };
+
+        let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+        let out_ico = out_dir.join("icon.ico");
+        let out_manifest = out_dir.join("manifest.rc");
+
+        let img = ImageReader::open("../flatpak/com.github.polymeilex.neothesia.png")
+            .unwrap()
+            .decode()
+            .unwrap();
+
+        img.save(&out_ico);
+
+        let manifest = "neothesia_icon ICON \"icon.ico\"";
+        std::fs::write(&out_manifest, &manifest);
+
+        embed_resource::compile(&out_manifest, embed_resource::NONE);
+    }
+}

neothesia/src/main.rs

@@ -291,6 +291,10 @@ fn init(builder: winit::window::WindowBuilder) -> (EventLoop<NeothesiaEvent>, Ta
 
     let window = builder.build(&event_loop).unwrap();
 
+    if let Err(err) = set_window_icon(&window) {
+        log::error!("Failed to load window icon: {}", err);
+    }
+
     let window_state = WindowState::new(&window);
     let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
         backends: wgpu_jumpstart::default_backends(),
@@ -308,3 +312,25 @@ fn init(builder: winit::window::WindowBuilder) -> (EventLoop<NeothesiaEvent>, Ta
 
     (event_loop, target, surface)
 }
+
+fn set_window_icon(window: &winit::window::Window) -> Result<(), Box<dyn std::error::Error>> {
+    use iced_graphics::image::image_rs;
+    use image_rs::codecs::png::PngDecoder;
+    use image_rs::ImageDecoder;
+    use std::io::{Cursor, Read};
+
+    let icon = PngDecoder::new(Cursor::new(include_bytes!(
+        "../../flatpak/com.github.polymeilex.neothesia.png"
+    )))?;
+
+    let (w, h) = icon.dimensions();
+
+    let mut icon = icon.into_reader()?;
+
+    let mut buff = Vec::new();
+    icon.read_to_end(&mut buff)?;
+
+    window.set_window_icon(Some(winit::window::Icon::from_rgba(buff, w, h)?));
+
+    Ok(())
+}