preWarm static method

Implementation

static Future<void> preWarm() async {
  if (_cachedProgram != null || _isPreparing) return;
  _isPreparing = true;
  const path = 'packages/liquid_glass_widgets/shaders/lightweight_glass.frag';
  const testPath = 'shaders/lightweight_glass.frag';

  try {
    ui.FragmentProgram program;
    try {
      program = await ui.FragmentProgram.fromAsset(path);
    } catch (_) {
      // Fallback for unit tests where package prefix may not be resolved
      program = await ui.FragmentProgram.fromAsset(testPath);
    }
    _cachedProgram = program;

    // On native platforms, create the shared shader instance
    if (!kIsWeb) {
      _sharedShader = program.fragmentShader();
    }
  } catch (e) {
    debugPrint('[LightweightGlass] Pre-warm failed: $e');
  } finally {
    _isPreparing = false;
  }
}