Add HImage application icon and Windows packaging resources

2026-11-02 19:12:18 +08:00
parent ac85474438
commit 58b47746df
27 changed files with 1356 additions and 1 deletions
@@ -0,0 +1,48 @@
+//! Regenerate the PNG and multi-resolution Windows ICO from the editable SVG.
+use image::codecs::ico::{IcoEncoder, IcoFrame};
+use std::{error::Error, fs::File};
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let tree = resvg::usvg::Tree::from_data(
+        include_bytes!("../assets/icon.svg"),
+        &resvg::usvg::Options::default(),
+    )?;
+    let mut frames = Vec::new();
+    for size in [16, 24, 32, 48, 64, 128, 256, 512] {
+        let mut pixmap = resvg::tiny_skia::Pixmap::new(size, size).ok_or("invalid size")?;
+        resvg::render(
+            &tree,
+            resvg::tiny_skia::Transform::from_scale(size as f32 / 512.0, size as f32 / 512.0),
+            &mut pixmap.as_mut(),
+        );
+        // tiny-skia stores premultiplied pixels; PNG and ICO need straight alpha.
+        let mut rgba = pixmap.take();
+        for pixel in rgba.as_chunks_mut::<4>().0 {
+            let alpha = pixel[3] as u32;
+            for channel in &mut pixel[..3] {
+                *channel = (*channel as u32 * 255 + alpha / 2)
+                    .checked_div(alpha)
+                    .unwrap_or(0)
+                    .min(255) as u8;
+            }
+        }
+        if size == 512 {
+            image::save_buffer(
+                "assets/icon.png",
+                &rgba,
+                size,
+                size,
+                image::ColorType::Rgba8,
+            )?;
+        } else {
+            frames.push(IcoFrame::as_png(
+                &rgba,
+                size,
+                size,
+                image::ExtendedColorType::Rgba8,
+            )?);
+        }
+    }
+    IcoEncoder::new(File::create("assets/icon.ico")?).encode_images(&frames)?;
+    Ok(())
+}