- Add an example file where we can pass a relative file path as an ar…

examples/convert_by_args.rs

@@ -0,0 +1,65 @@
+use image::*;
+use std::{env::args, fmt::format, path::Path};
+use webp::*;
+
+
+/// cargo run --example convert_by_args lake.jpg.
+fn main() {
+
+    //Add a get args functions
+    let arg: Vec<String> = args().collect();
+    if arg.len() != 2 {
+        eprintln!("Usage: command <name.extension>");
+        return;
+    }
+
+    //Add a format functions for a new Path by String
+    let path = format(format_args!("assets/{}", arg[1]));
+    let path = Path::new(&path);
+
+
+    // Using `image` crate, open the included .jpg file
+    let img = image::open(path).unwrap();
+    let (w, h) = img.dimensions();
+    // Optionally, resize the existing photo and convert back into DynamicImage
+    let size_factor = 1.0;
+    let img: DynamicImage = image::DynamicImage::ImageRgba8(imageops::resize(
+        &img,
+        (w as f64 * size_factor) as u32,
+        (h as f64 * size_factor) as u32,
+        imageops::FilterType::Triangle,
+    ));
+
+    // Create the WebP encoder for the above image
+    let encoder: Encoder = Encoder::from_image(&img).unwrap();
+    // Encode the image at a specified quality 0-100
+    let webp: WebPMemory = encoder.encode(90f32);
+    // Define and write the WebP-encoded file to a given path
+    let output_path = Path::new("assets").join("lake").with_extension("webp");
+    std::fs::write(&output_path, &*webp).unwrap();
+}
+
+#[test]
+fn test_convert() {
+    let path = format(format_args!("assets/{}", "lake.jpg"));
+    let path = Path::new(&path);
+    // Using `image` crate, open the included .jpg file
+    let img = image::open(path).unwrap();
+    let (w, h) = img.dimensions();
+    // Optionally, resize the existing photo and convert back into DynamicImage
+    let size_factor = 1.0;
+    let img: DynamicImage = image::DynamicImage::ImageRgba8(imageops::resize(
+        &img,
+        (w as f64 * size_factor) as u32,
+        (h as f64 * size_factor) as u32,
+        imageops::FilterType::Triangle,
+    ));
+
+    // Create the WebP encoder for the above image
+    let encoder: Encoder = Encoder::from_image(&img).unwrap();
+    // Encode the image at a specified quality 0-100
+    let webp: WebPMemory = encoder.encode(90f32);
+    // Define and write the WebP-encoded file to a given path
+    let output_path = Path::new("assets").join("lake").with_extension("webp");
+    std::fs::write(&output_path, &*webp).unwrap();
+}