feat: saving as jxl

src/main.rs

@@ -1,4 +1,10 @@
-use std::{env, ffi::OsStr, fs, io::Read, path::Path};
+use std::{
+    env,
+    ffi::OsStr,
+    fs,
+    io::{Read, Write},
+    path::Path,
+};
 
 use iced::{
     Alignment, Color, Element, Length, Renderer, Subscription, Task, Theme, color, event,
@@ -6,8 +12,7 @@ use iced::{
     theme, widget, window,
 };
 use image::{
-    DynamicImage, EncodableLayout, ImageDecoder, ImageReader, RgbImage, RgbaImage,
-    codecs::webp::WebPEncoder, imageops,
+    DynamicImage, EncodableLayout, ImageDecoder, ImageReader, RgbImage, RgbaImage, imageops,
 };
 use jpegxl_rs::decode::JxlDecoder;
 use rfd::FileDialog;
@@ -197,14 +202,27 @@ impl State {
 
         match path.extension().map(OsStr::to_string_lossy).as_deref() {
             Some("jxl") => {
-                jpegxl_rs::encoder_builder().build().unwrap().encode(
-                    RgbImage::from(DynamicImage::from(*image)).as_bytes(),
-                    image.width(),
-                    image.height(),
-                );
+                let mut encoder = jpegxl_rs::encoder_builder().build().unwrap();
+                let rgb_image = DynamicImage::from(image.to_owned()).into_rgb8();
+                let jxl = match encoder.encode::<u8, u8>(
+                    &rgb_image,
+                    rgb_image.width(),
+                    rgb_image.height(),
+                ) {
+                    Ok(j) => j,
+                    Err(e) => {
+                        return Some(format!("failed to encode jxl '{}': {e}", path.display()));
+                    }
+                };
+
+                if let Err(e) = file.write(&jxl.data) {
+                    return Some(format!("failed to write jxl to '{}': {e}", path.display()));
+                };
             }
             None | Some(_) => {
-                image.save(path);
+                if let Err(e) = image.save(&path) {
+                    return Some(format!("failed to save '{}': {e}", path.display()));
+                };
             }
         };