Initial upload

src/lib.rs

@@ -0,0 +1,31 @@
+use wasm_bindgen::prelude::*;
+use web_sys::console::log_1 as log;
+use base64::{ encode, decode };
+use image::load_from_memory;
+use image::ImageOutputFormat::Png;
+
+#[wasm_bindgen]
+pub fn grayscale(encoded_file: &str) -> String {
+    log(&"Grayscale called".into());
+
+    let base64_to_vector = decode(encoded_file).unwrap();
+    log(&"Image decoded".into());
+
+    let mut img = load_from_memory(&base64_to_vector).unwrap();
+    log(&"Image loaded".into());
+
+    img = img.grayscale();
+    log(&"Grayscale effect applied".into());
+
+    let mut buffer = vec![];
+    img.write_to(&mut buffer, Png).unwrap();
+    log(&"New image written".into());
+
+    let encoded_img = encode(&buffer);
+    let data_url = format!(
+        "data:image/png;base64,{}",
+        encoded_img
+    );
+
+    data_url
+}