feat: improved emscripten-compatible asset loading api

src/asset.rs

@@ -0,0 +1,71 @@
+//! Cross-platform asset loading abstraction.
+//! On desktop, assets are embedded using include_bytes!; on Emscripten, assets are loaded from the filesystem.
+
+use std::borrow::Cow;
+use std::io;
+
+#[derive(Debug)]
+pub enum AssetError {
+    Io(io::Error),
+}
+
+impl From<io::Error> for AssetError {
+    fn from(e: io::Error) -> Self {
+        AssetError::Io(e)
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Asset {
+    Wav1,
+    Wav2,
+    Wav3,
+    Wav4,
+    Pacman,
+    Pellet,
+    Energizer,
+    Map,
+    FontKonami,
+    GhostBody,
+    GhostEyes,
+    // Add more as needed
+}
+
+#[cfg(not(target_os = "emscripten"))]
+mod imp {
+    use super::*;
+    macro_rules! asset_bytes_enum {
+        ( $asset:expr ) => {
+            match $asset {
+                Asset::Wav1 => Cow::Borrowed(include_bytes!("../assets/wav/1.ogg")),
+                Asset::Wav2 => Cow::Borrowed(include_bytes!("../assets/wav/2.ogg")),
+                Asset::Wav3 => Cow::Borrowed(include_bytes!("../assets/wav/3.ogg")),
+                Asset::Wav4 => Cow::Borrowed(include_bytes!("../assets/wav/4.ogg")),
+                Asset::Pacman => Cow::Borrowed(include_bytes!("../assets/32/pacman.png")),
+                Asset::Pellet => Cow::Borrowed(include_bytes!("../assets/24/pellet.png")),
+                Asset::Energizer => Cow::Borrowed(include_bytes!("../assets/24/energizer.png")),
+                Asset::Map => Cow::Borrowed(include_bytes!("../assets/map.png")),
+                Asset::FontKonami => Cow::Borrowed(include_bytes!("../assets/font/konami.ttf")),
+                Asset::GhostBody => Cow::Borrowed(include_bytes!("../assets/32/ghost_body.png")),
+                Asset::GhostEyes => Cow::Borrowed(include_bytes!("../assets/32/ghost_eyes.png")),
+            }
+        };
+    }
+    pub fn get_asset_bytes(asset: Asset) -> Result<Cow<'static, [u8]>, AssetError> {
+        Ok(asset_bytes_enum!(asset))
+    }
+}
+
+#[cfg(target_os = "emscripten")]
+mod imp {
+    use super::*;
+    use std::fs;
+    use std::path::Path;
+    pub fn get_asset_bytes(asset: Asset) -> Result<Cow<'static, [u8]>, AssetError> {
+        let path = Path::new("assets").join(asset.path());
+        let bytes = fs::read(&path)?;
+        Ok(Cow::Owned(bytes))
+    }
+}
+
+pub use imp::get_asset_bytes;