Begin resize option

src/main.rs

@@ -1,9 +1,15 @@
+#![windows_subsystem = "windows"]
+
 use anyhow::{anyhow, Result};
+use clap::{Arg, Command};
+use image::{imageops::FilterType, io::Reader as ImageReader};
 use log::info;
-use rfd::FileDialog;
+use native_dialog::{FileDialog, MessageDialog};
+use rexiv2::Metadata;
 use rust_embed::RustEmbed;
 use simplelog::{ColorChoice, ConfigBuilder, LevelFilter, TermLogger, TerminalMode};
-use std::{path::PathBuf, thread::JoinHandle};
+use std::{fs::File, io::BufWriter, path::PathBuf, thread::JoinHandle};
+use tempfile::tempdir;
 use warp::Filter;
 use wry::{
     application::{
@@ -30,7 +36,17 @@ fn main() -> Result<()> {
         ColorChoice::Auto,
     )?;
 
-    let img_path = if let Some(img_path) = std::env::args_os().skip(1).next() {
+    let tmp_dir = tempdir()?;
+
+    let cmd = Command::new("Simple panorama viewer")
+        .arg(
+            Arg::new("filename")
+                .allow_invalid_utf8(true)
+                .help("Image path"),
+        )
+        .get_matches();
+
+    let img_path = if let Some(img_path) = cmd.value_of_os("filename") {
         PathBuf::from(img_path)
     } else {
         let user_dirs = directories::UserDirs::new().unwrap();
@@ -46,13 +62,49 @@ fn main() -> Result<()> {
                     "jpg", "JPG", "jpeg", "pjpeg", "pjpg", "PJPG", "webp", "avif",
                 ],
             )
-            .set_directory(dir)
-            .pick_file()
+            .set_location(dir)
+            .show_open_single_file()?
             .ok_or_else(|| anyhow!("No file"))?
     };
 
     info!("Open `{}`", img_path.display());
-    let img_data = std::fs::read(img_path)?;
+    let (width, height) = image::image_dimensions(&img_path)?;
+    const MAX_IMG_SIZE: u32 = 20_000_000;
+    let img_data_path = if height * width > MAX_IMG_SIZE {
+        // @todo Option pas de resize / taille en ligne de commande
+        // @todo Option pas de resize / taille dans une config
+        // @todo Icon
+        let ratio = (height * width) as f64 / MAX_IMG_SIZE as f64;
+        let new_height = (height as f64 / ratio.sqrt()) as u32;
+        let new_width = (width as f64 / ratio.sqrt()) as u32;
+
+        if MessageDialog::new()
+            .set_title("Resize")
+            .set_text(&format!("Resize the file to {} × {}", new_width, new_height))
+            .show_confirm()?
+        {
+            // Resize image
+            let img = ImageReader::open(&img_path)?.decode()?;
+            info!("Resize image to {} × {}", new_width, new_height);
+            let image_resized = img.resize(new_width, new_height, FilterType::Triangle);
+
+            // Save file and add metadata
+            let tmp_img_path = tmp_dir.path().join("img.jpg");
+            image_resized.write_to(
+                &mut BufWriter::new(File::create(&tmp_img_path)?),
+                image::ImageOutputFormat::Jpeg(95),
+            )?;
+            let metadata = Metadata::new_from_path(&img_path)?;
+            metadata.save_to_file(&tmp_img_path)?;
+            tmp_img_path
+        } else {
+            img_path
+        }
+    } else {
+        img_path
+    };
+    let img_data = std::fs::read(&img_data_path)?;
+    tmp_dir.close()?;
     let img_base_64 = base64::encode(img_data);
 
     info!("Generate HTML");