fix: use sdl2 internal methods for loading resources for emscripten asset handling

.github/workflows/build.yaml

@@ -11,8 +11,6 @@ env:
 jobs:
   build:
     name: Build (${{ matrix.target }})
-    env:
-      VCPKG_SYSTEM_LIBRARIES: "OFF"
     strategy:
       fail-fast: false
       matrix:
@@ -47,15 +45,16 @@ jobs:
         uses: actions/cache@v4
         with:
           path: target/vcpkg
-          key: ${{ runner.os }}-vcpkg-${{ hashFiles('Cargo.toml', 'Cargo.lock') }}
+          key: vcpkg-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('Cargo.toml', 'Cargo.lock') }}
           restore-keys: |
-            ${{ runner.os }}-vcpkg-
+            ${{ runner.os }}-vcpkg
+            vcpkg-${{ runner.os }}-${{ matrix.target }}-
 
       - name: Vcpkg Linux Dependencies
         if: runner.os == 'Linux'
         run: |
           sudo apt-get update
-          sudo apt-get install -y build-essential gettext libltdl-dev
+          sudo apt-get install -y build-essential gettext libltdl-dev zlib1g-dev
 
       - name: Vcpkg
         run: |
@@ -125,7 +124,7 @@ jobs:
           mkdir -p dist
           cp assets/site/{build.css,favicon.ico,index.html} dist
           output_folder="target/wasm32-unknown-emscripten/release"
-          cp $output_folder/pacman.{wasm,js,data} dist
+          cp $output_folder/pacman.{wasm,js} $output_folder/deps/pacman.data dist
 
       - name: Upload Artifact
         uses: actions/upload-pages-artifact@v3

src/asset.rs

@@ -78,15 +78,17 @@ mod imp {
 #[cfg(target_os = "emscripten")]
 mod imp {
     use super::*;
-    use std::fs;
+    use sdl2::rwops::RWops;
-    use std::path::Path;
+    use std::io::Read;
     pub fn get_asset_bytes(asset: Asset) -> Result<Cow<'static, [u8]>, AssetError> {
-        let path = Path::new("assets/game").join(asset.path());
+        let path = format!("assets/game/{}", asset.path());
-        if !path.exists() {
+        let mut rwops = RWops::from_file(&path, "rb").map_err(|_| AssetError::NotFound(asset.path().to_string()))?;
-            return Err(AssetError::NotFound(asset.path().to_string()));
+        let len = rwops.len().ok_or_else(|| AssetError::NotFound(asset.path().to_string()))?;
-        }
+        let mut buf = vec![0u8; len];
-        let bytes = fs::read(&path)?;
+        rwops
-        Ok(Cow::Owned(bytes))
+            .read_exact(&mut buf)
+            .map_err(|e| AssetError::Io(std::io::Error::new(std::io::ErrorKind::Other, e)))?;
+        Ok(Cow::Owned(buf))
     }
 }