update README.md

README.md

@@ -2,6 +2,76 @@
 
 A barcode and QR code scanner based on [ZXing C++](https://github.com/nu-book/zxing-cpp) library natively in Flutter with Dart FFI.
 
+## Supported Formats
+
+| 1D product | 1D industrial     | 2D
+| ---------- | ----------------- | --------------
+| UPC-A      | Code 39           | QR Code
+| UPC-E      | Code 93           | DataMatrix
+| EAN-8      | Code 128          | Aztec
+| EAN-13     | Codabar           | PDF417
+| DataBar    | ITF               | MaxiCode (beta)
+|            | DataBar Expanded  |
+
+## Getting Started
+### To read barcode:
+```dart
+import 'package:flutter_zxing/flutter_zxing.dart';
+
+// Use ZxingReaderWidget to quickly read barcode from camera image
+@override
+Widget build(BuildContext context) {
+    return Scaffold(
+        body: ZxingReaderWidget(
+            onScan: (result) async {
+                // Do something with the result
+            },
+        ),
+    ),
+);
+
+// Or use FlutterZxing to read barcode from camera image directly
+cameraController?.startImageStream((img) async {
+    final bytes = await convertImage(img);
+    final result = FlutterZxing.readBarcode(bytes, Format.Any, img.width, img.height, 200, 200);
+    if (result.isValidBool) {
+        debugPrint(result.textString);
+    }
+    return null;
+});
+```
+
+### To create barcode:
+```dart
+import 'package:flutter_zxing/flutter_zxing.dart';
+import 'dart:typed_data';
+import 'package:image/image.dart' as imglib;
+
+// Use ZxingWriterWidget to quickly read barcode from camera image
+@override
+Widget build(BuildContext context) {
+    return Scaffold(
+        body: ZxingWriterWidget(
+            onSuccess: (result, bytes) {
+                // Do something with the result
+            },
+            onError: (error) {
+                // Do something with the error
+            },
+        ),
+    ),
+);
+
+// Or use FlutterZxing to create barcode directly
+final text = 'Text to encode';
+final result = FlutterZxing.encodeBarcode(text, 300, 300, Format.Any, 10, 0);
+if (result.isValidBool) {
+    final img = imglib.Image.fromBytes(width, height, result.bytes);
+    final encodedBytes = Uint8List.fromList(imglib.encodeJpg(img));
+    // use encodedBytes as you wish
+}
+```
+
 ## License
 
 MIT License. See [LICENSE](https://github.com/khoren93/flutter_zxing/blob/master/LICENSE).

lib/flutter_zxing.dart

@@ -12,6 +12,8 @@ import 'generated_bindings.dart';
 export 'generated_bindings.dart';
 export 'zxing_reader_widget.dart';
 export 'zxing_writer_widget.dart';
+export 'image_converter.dart';
+export 'scanner_overlay.dart';
 
 class FlutterZxing {
   static const MethodChannel _channel = MethodChannel('flutter_zxing');

lib/isolate_utils.dart

@@ -4,7 +4,6 @@ import 'dart:math';
 import 'package:camera/camera.dart';
 
 import 'flutter_zxing.dart';
-import 'image_converter.dart';
 
 // Inspired from https://github.com/am15h/object_detection_flutter
 

lib/zxing_reader_widget.dart

@@ -10,7 +10,6 @@ import 'package:flutter_beep/flutter_beep.dart';
 import 'flutter_zxing.dart';
 
 import 'isolate_utils.dart';
-import 'scanner_overlay.dart';
 
 class ZxingReaderWidget extends StatefulWidget {
   const ZxingReaderWidget({