Use Verovio renderData for score SVGs

apps/theme_lab/app.py

@@ -386,14 +386,18 @@ def render_musicxml_with_python_verovio(musicxml_path: Path, svg_path: Path) ->
     try:
         import verovio
 
+        musicxml_data = musicxml_path.read_text(encoding="utf-8")
         toolkit = verovio.toolkit()
         toolkit.setOptions({"scale": 42})
-        loaded = toolkit.loadFile(str(musicxml_path))
-        if not loaded and hasattr(toolkit, "loadData"):
-            loaded = toolkit.loadData(musicxml_path.read_text(encoding="utf-8"))
-        if not loaded:
+        svg = toolkit.renderData(musicxml_data, {}) if hasattr(toolkit, "renderData") else ""
+        if not svg:
+            loaded = toolkit.loadData(musicxml_data) if hasattr(toolkit, "loadData") else toolkit.loadFile(str(musicxml_path))
+            if not loaded:
+                return None
+            svg = toolkit.renderToSVG(1)
+        if "<svg" not in svg:
             return None
-        svg_path.write_text(toolkit.renderToSVG(1), encoding="utf-8")
+        svg_path.write_text(svg, encoding="utf-8")
     except Exception:
         return None
     return svg_path if svg_path.exists() else None