some small refactoring

src/lib.rs

@@ -0,0 +1,36 @@
+#![feature(lazy_cell)]
+
+pub mod assets;
+pub mod constants;
+pub mod renderer;
+    
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use renderer::*;
+    use assets::*;
+
+    // not actually used, just for benchmarking
+    use std::time::Instant;
+        
+    #[test]
+    fn it_works() {
+        let game_sheet_02 = load_spritesheet("assets/GJ_GameSheet02-uhd.plist");
+        let game_sheet_glow = load_spritesheet("assets/GJ_GameSheetGlow-uhd.plist");
+
+        let start = Instant::now();
+        let rendered_img = render_normal(
+            "ship_18".to_string(),
+            [0.0/255.0, 0.0/255.0, 0.0/255.0],
+            [0.0/255.0, 0.0/255.0, 0.0/255.0],
+            true,
+            game_sheet_02,
+            game_sheet_glow,
+        );
+
+        rendered_img.save("rendered_icon.png").expect("saving image failed");
+        let end = Instant::now();
+        println!("Time elapsed: {:?}", end.duration_since(start));
+    }
+}