readShaderUniformsFromAsset function

Future<ShaderUniformBindings> readShaderUniformsFromAsset(String filePath)

Reads a shader asset and returns all uniform declarations.

Uses UTF-8 decoding with malformed fallback to handle compiled payloads.

Implementation

Future<ShaderUniformBindings> readShaderUniformsFromAsset(
    String filePath) async {
  try {
    final byteData = await rootBundle.load(filePath);
    final bytes = byteData.buffer
        .asUint8List(byteData.offsetInBytes, byteData.lengthInBytes);

    String shaderSource;
    try {
      shaderSource = utf8.decode(bytes);
    } on FormatException {
      // Some Android shader assets are not strict UTF-8, but still contain
      // enough text/JSON metadata for uniform extraction.
      shaderSource = const Utf8Decoder(allowMalformed: true).convert(bytes);
    }

    return parseShaderUniforms(shaderSource);
  } on PlatformException catch (e) {
    debugPrint('readShaderUniformsFromAsset.error: $e');
    rethrow;
  } on FormatException {
    rethrow;
  }
}