Initial commit

plugins/png_to_jpeg.rs

@@ -0,0 +1,23 @@
+use crate::plugin::Plugin;
+use image::ImageFormat;
+use std::io::Cursor;
+
+pub struct PluginImpl;
+
+impl Plugin for PluginImpl {
+    fn name(&self) -> &'static str { "png_to_jpeg" }
+    fn from_formats(&self) -> Vec<&'static str> { vec!["png"] }
+    fn to_formats(&self) -> Vec<&'static str> { vec!["jpeg"] }
+    fn familiarity(&self) -> u8 { 255 }
+    fn quality(&self) -> u8 { 200 } // JPEG has some compression loss
+    fn speed(&self) -> u8 { 220 }
+    
+    fn convert(&self, input: &[u8], _from: &str, _to: &str) -> Result<Vec<u8>, String> {
+        let img = image::load_from_memory_with_format(input, ImageFormat::Png)
+            .map_err(|e| e.to_string())?;
+        let mut buf = Vec::new();
+        img.write_to(&mut Cursor::new(&mut buf), ImageFormat::Jpeg)
+            .map_err(|e| e.to_string())?;
+        Ok(buf)
+    }
+}