allow to read barcode from image

example/ios/Podfile.lock

@@ -1,50 +1,85 @@
 PODS:
   - camera (0.0.1):
     - Flutter
+  - connectivity_plus (0.0.1):
+    - Flutter
+    - ReachabilitySwift
   - Flutter (1.0.0)
   - flutter_beep (0.0.1):
     - Flutter
   - flutter_zxing (0.0.1):
     - Flutter
+  - fluttertoast (0.0.2):
+    - Flutter
+    - Toast
+  - nb_utils (0.0.1):
+    - Flutter
   - path_provider_ios (0.0.1):
     - Flutter
+  - ReachabilitySwift (5.0.0)
   - share_plus (0.0.1):
     - Flutter
+  - shared_preferences_ios (0.0.1):
+    - Flutter
+  - Toast (4.0.0)
   - url_launcher_ios (0.0.1):
     - Flutter
 
 DEPENDENCIES:
   - camera (from `.symlinks/plugins/camera/ios`)
+  - connectivity_plus (from `.symlinks/plugins/connectivity_plus/ios`)
   - Flutter (from `Flutter`)
   - flutter_beep (from `.symlinks/plugins/flutter_beep/ios`)
   - flutter_zxing (from `.symlinks/plugins/flutter_zxing/ios`)
+  - fluttertoast (from `.symlinks/plugins/fluttertoast/ios`)
+  - nb_utils (from `.symlinks/plugins/nb_utils/ios`)
   - path_provider_ios (from `.symlinks/plugins/path_provider_ios/ios`)
   - share_plus (from `.symlinks/plugins/share_plus/ios`)
+  - shared_preferences_ios (from `.symlinks/plugins/shared_preferences_ios/ios`)
   - url_launcher_ios (from `.symlinks/plugins/url_launcher_ios/ios`)
 
+SPEC REPOS:
+  trunk:
+    - ReachabilitySwift
+    - Toast
+
 EXTERNAL SOURCES:
   camera:
     :path: ".symlinks/plugins/camera/ios"
+  connectivity_plus:
+    :path: ".symlinks/plugins/connectivity_plus/ios"
   Flutter:
     :path: Flutter
   flutter_beep:
     :path: ".symlinks/plugins/flutter_beep/ios"
   flutter_zxing:
     :path: ".symlinks/plugins/flutter_zxing/ios"
+  fluttertoast:
+    :path: ".symlinks/plugins/fluttertoast/ios"
+  nb_utils:
+    :path: ".symlinks/plugins/nb_utils/ios"
   path_provider_ios:
     :path: ".symlinks/plugins/path_provider_ios/ios"
   share_plus:
     :path: ".symlinks/plugins/share_plus/ios"
+  shared_preferences_ios:
+    :path: ".symlinks/plugins/shared_preferences_ios/ios"
   url_launcher_ios:
     :path: ".symlinks/plugins/url_launcher_ios/ios"
 
 SPEC CHECKSUMS:
   camera: 9993f92f2c793e87b65e35f3a23c70582afb05b1
+  connectivity_plus: 413a8857dd5d9f1c399a39130850d02fe0feaf7e
   Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
   flutter_beep: 54fb393b22dfa0f0e4573c81b1c74dd71c4e5af8
   flutter_zxing: 19a866d17c8a87ee1026d68521c69d2f008635f6
+  fluttertoast: 16fbe6039d06a763f3533670197d01fc73459037
+  nb_utils: ada4338858d8827ec92fdab2a545206b4ba4cfb1
   path_provider_ios: 14f3d2fd28c4fdb42f44e0f751d12861c43cee02
+  ReachabilitySwift: 985039c6f7b23a1da463388634119492ff86c825
   share_plus: 056a1e8ac890df3e33cb503afffaf1e9b4fbae68
+  shared_preferences_ios: 548a61f8053b9b8a49ac19c1ffbc8b92c50d68ad
+  Toast: 91b396c56ee72a5790816f40d3a94dd357abc196
   url_launcher_ios: 839c58cdb4279282219f5e248c3321761ff3c4de
 
 PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c

example/lib/pages/creator_page.dart

@@ -1,13 +1,8 @@
 import 'dart:io';
 import 'dart:typed_data';
 
-import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_zxing/flutter_zxing.dart';
-import 'package:flutter_zxing/generated_bindings.dart';
-import 'package:flutter_zxing/zxing_reader_widget.dart';
-import 'package:flutter_zxing/zxing_writer_widget.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:share_plus/share_plus.dart';
 
@@ -23,22 +18,12 @@ class CreatorPage extends StatefulWidget {
   State<CreatorPage> createState() => _CreatorPageState();
 }
 
-class _CreatorPageState extends State<CreatorPage>
-    with TickerProviderStateMixin {
-  CameraController? controller;
-  TabController? _tabController;
-
+class _CreatorPageState extends State<CreatorPage> {
   bool isAndroid() => Theme.of(context).platform == TargetPlatform.android;
 
-  // Scan result queue
-  final _resultQueue = <CodeResult>[];
-
   // Write result
   Uint8List? writeResult;
 
-  // true when the camera is active
-  bool _isScanning = true;
-
   @override
   void initState() {
     super.initState();
@@ -47,64 +32,18 @@ class _CreatorPageState extends State<CreatorPage>
   }
 
   void initStateAsync() async {
-    _tabController = TabController(length: 3, vsync: this);
-    _tabController?.addListener(() {
-      _isScanning = _tabController?.index == 0;
-      if (_isScanning) {
-        controller?.resumePreview();
-      } else {
-        controller?.pausePreview();
-      }
-    });
     getTemporaryDirectory().then((value) {
       tempDir = value;
     });
   }
 
-  @override
-  void dispose() {
-    super.dispose();
-    controller?.dispose();
-  }
-
-  void showInSnackBar(String message) {}
-
-  void logError(String code, String? message) {
-    if (message != null) {
-      debugPrint('Error: $code\nError Message: $message');
-    } else {
-      debugPrint('Error: $code');
-    }
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Creator'),
-        bottom: TabBar(
-          controller: _tabController,
-          tabs: const [
-            Tab(text: 'Scanner'),
-            Tab(text: 'Result'),
-            Tab(text: 'Writer'),
-          ],
       ),
-      ),
-      body: TabBarView(
-        controller: _tabController,
-        children: [
-          // Scanner
-          ZxingReaderWidget(onScan: (result) async {
-            _resultQueue.insert(0, result);
-            _tabController?.index = 1;
-            await Future.delayed(const Duration(milliseconds: 500));
-            setState(() {});
-          }),
-          // Result
-          _buildResultList(),
-          // Writer
-          SingleChildScrollView(
+      body: SingleChildScrollView(
         child: Column(
           children: [
             ZxingWriterWidget(
@@ -120,11 +59,14 @@ class _CreatorPageState extends State<CreatorPage>
                 ScaffoldMessenger.of(context).hideCurrentSnackBar();
                 ScaffoldMessenger.of(context).showSnackBar(
                   SnackBar(
-                        content: Text(
+                    content: Padding(
+                      padding: const EdgeInsets.only(bottom: 30.0),
+                      child: Text(
                         error,
                         textAlign: TextAlign.center,
                       ),
                     ),
+                  ),
                 );
               },
             ),
@@ -132,8 +74,6 @@ class _CreatorPageState extends State<CreatorPage>
           ],
         ),
       ),
-        ],
-      ),
     );
   }
 
@@ -157,44 +97,4 @@ class _CreatorPageState extends State<CreatorPage>
       ],
     );
   }
-
-  _buildResultList() {
-    return _resultQueue.isEmpty
-        ? const Center(
-            child: Text(
-            'No Results',
-            style: TextStyle(fontSize: 24),
-          ))
-        : ListView.builder(
-            itemCount: _resultQueue.length,
-            itemBuilder: (context, index) {
-              final result = _resultQueue[index];
-              return ListTile(
-                title: Text(result.textString),
-                subtitle: Text(result.formatString),
-                trailing: ButtonBar(
-                  mainAxisSize: MainAxisSize.min,
-                  children: [
-                    // Copy button
-                    TextButton(
-                      child: const Text('Copy'),
-                      onPressed: () {
-                        Clipboard.setData(
-                            ClipboardData(text: result.textString));
-                      },
-                    ),
-                    // Remove button
-                    IconButton(
-                      icon: const Icon(Icons.delete, color: Colors.red),
-                      onPressed: () {
-                        _resultQueue.removeAt(index);
-                        setState(() {});
-                      },
-                    ),
-                  ],
-                ),
-              );
-            },
-          );
-  }
 }

example/lib/pages/history_page.dart

@@ -1,18 +1,6 @@
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_zxing/flutter_zxing.dart';
-import 'package:flutter_zxing/generated_bindings.dart';
-import 'package:flutter_zxing/zxing_reader_widget.dart';
-import 'package:flutter_zxing/zxing_writer_widget.dart';
-import 'package:path_provider/path_provider.dart';
-import 'package:share_plus/share_plus.dart';
-
-late Directory tempDir;
-String get tempPath => '${tempDir.path}/zxing.jpg';
 
 class HistoryPage extends StatefulWidget {
   const HistoryPage({
@@ -23,137 +11,16 @@ class HistoryPage extends StatefulWidget {
   State<HistoryPage> createState() => _HistoryPageState();
 }
 
-class _HistoryPageState extends State<HistoryPage> with TickerProviderStateMixin {
-  CameraController? controller;
-  TabController? _tabController;
-
-  bool isAndroid() => Theme.of(context).platform == TargetPlatform.android;
-
-  // Scan result queue
+class _HistoryPageState extends State<HistoryPage> {
   final _resultQueue = <CodeResult>[];
 
-  // Write result
-  Uint8List? writeResult;
-
-  // true when the camera is active
-  bool _isScanning = true;
-
-  @override
-  void initState() {
-    super.initState();
-
-    initStateAsync();
-  }
-
-  void initStateAsync() async {
-    _tabController = TabController(length: 3, vsync: this);
-    _tabController?.addListener(() {
-      _isScanning = _tabController?.index == 0;
-      if (_isScanning) {
-        controller?.resumePreview();
-      } else {
-        controller?.pausePreview();
-      }
-    });
-    getTemporaryDirectory().then((value) {
-      tempDir = value;
-    });
-  }
-
-  @override
-  void dispose() {
-    super.dispose();
-    controller?.dispose();
-  }
-
-  void showInSnackBar(String message) {}
-
-  void logError(String code, String? message) {
-    if (message != null) {
-      debugPrint('Error: $code\nError Message: $message');
-    } else {
-      debugPrint('Error: $code');
-    }
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Flutter Scanner'),
-        bottom: TabBar(
-          controller: _tabController,
-          tabs: const [
-            Tab(text: 'Scanner'),
-            Tab(text: 'Result'),
-            Tab(text: 'Writer'),
-          ],
-        ),
+        title: const Text('History'),
       ),
-      body: TabBarView(
-        controller: _tabController,
-        children: [
-          // Scanner
-          ZxingReaderWidget(onScan: (result) async {
-            _resultQueue.insert(0, result);
-            _tabController?.index = 1;
-            await Future.delayed(const Duration(milliseconds: 500));
-            setState(() {});
-          }),
-          // Result
-          _buildResultList(),
-          // Writer
-          SingleChildScrollView(
-            child: Column(
-              children: [
-                ZxingWriterWidget(
-                  onSuccess: (result) {
-                    setState(() {
-                      writeResult = result;
-                    });
-                  },
-                  onError: (error) {
-                    setState(() {
-                      writeResult = null;
-                    });
-                    ScaffoldMessenger.of(context).hideCurrentSnackBar();
-                    ScaffoldMessenger.of(context).showSnackBar(
-                      SnackBar(
-                        content: Text(
-                          error,
-                          textAlign: TextAlign.center,
-                        ),
-                      ),
-                    );
-                  },
-                ),
-                if (writeResult != null) buildWriteResult(),
-              ],
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-
-  Column buildWriteResult() {
-    return Column(
-      children: [
-        // Barcode image
-        Image.memory(writeResult ?? Uint8List(0)),
-        // Share button
-        ElevatedButton(
-          onPressed: () {
-            // Save image to device
-            final file = File(tempPath);
-            file.writeAsBytesSync(writeResult ?? Uint8List(0));
-            final path = file.path;
-            // Share image
-            Share.shareFiles([path]);
-          },
-          child: const Text('Share'),
-        ),
-      ],
+      body: _buildResultList(),
     );
   }
 
@@ -169,7 +36,7 @@ class _HistoryPageState extends State<HistoryPage> with TickerProviderStateMixin
             itemBuilder: (context, index) {
               final result = _resultQueue[index];
               return ListTile(
-                title: Text(result.textString),
+                title: Text(result.textString ?? ''),
                 subtitle: Text(result.formatString),
                 trailing: ButtonBar(
                   mainAxisSize: MainAxisSize.min,

example/lib/pages/scanner_page.dart

@@ -1,5 +1,10 @@
+import 'dart:typed_data';
+
 import 'package:flutter/material.dart';
-import 'package:flutter_zxing/zxing_reader_widget.dart';
+import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:image/image.dart' as imglib;
 
 class ScannerPage extends StatefulWidget {
   const ScannerPage({
@@ -10,60 +15,45 @@ class ScannerPage extends StatefulWidget {
   State<ScannerPage> createState() => _ScannerPageState();
 }
 
-class _ScannerPageState extends State<ScannerPage>
-    with TickerProviderStateMixin {
-  TabController? _tabController;
-
-  @override
-  void initState() {
-    super.initState();
-
-    initStateAsync();
-  }
-
-  void initStateAsync() async {
-    _tabController = TabController(length: 3, vsync: this);
-  }
-
-  @override
-  void dispose() {
-    super.dispose();
-    _tabController?.dispose();
-  }
+class _ScannerPageState extends State<ScannerPage> {
+  final ImagePicker _picker = ImagePicker();
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Scanner'),
-        bottom: TabBar(
-          controller: _tabController,
-          tabs: const [
-            Tab(text: 'Single code'),
-            Tab(text: 'Multi code'),
-            Tab(text: 'Image'),
-          ],
       ),
-      ),
-      body: TabBarView(
-        controller: _tabController,
-        children: [
-          // Single code scanner
-          ZxingReaderWidget(onScan: (result) async {
+      body: ZxingReaderWidget(
+        onScan: (result) async {
           // _resultQueue.insert(0, result);
           // await Future.delayed(const Duration(milliseconds: 500));
           // setState(() {});
-          }),
-          // Multi code scanner
-          Container(),
-          // ZxingReaderWidget(onScan: (result) async {
-          //   // _resultQueue.insert(0, result);
-          //   // await Future.delayed(const Duration(milliseconds: 500));
-          //   // setState(() {});
-          // }),
-          // Image scanner
-          Container(),
-        ],
+        },
+      ),
+      floatingActionButton: FloatingActionButton(
+        child: const Icon(FontAwesomeIcons.image),
+        onPressed: () async {
+          final XFile? file =
+              await _picker.pickImage(source: ImageSource.gallery);
+          if (file != null) {
+            final Uint8List bytes = await file.readAsBytes();
+            imglib.Image? image = imglib.decodeImage(bytes);
+            if (image != null) {
+              final CodeResult result = FlutterZxing.readBarcode(
+                image.getBytes(format: imglib.Format.luminance),
+                Format.Any,
+                image.width,
+                image.height,
+                0,
+                0,
+              );
+              if (result.isValidBool) {
+                debugPrint(result.textString);
+              }
+            }
+          }
+        },
       ),
     );
   }

example/pubspec.lock

@@ -105,7 +105,7 @@ packages:
       name: camera
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.4+19"
+    version: "0.9.4+21"
   camera_platform_interface:
     dependency: transitive
     description:
@@ -378,6 +378,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.13.4"
   http_multi_server:
     dependency: transitive
     description:
@@ -399,6 +406,41 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.3"
+  image_picker:
+    dependency: "direct main"
+    description:
+      name: image_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.5"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.4+11"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.6"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.5"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.4"
   intl:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -18,6 +18,7 @@ dependencies:
   flutter_zxing:
     path: ../
   font_awesome_flutter: ^10.1.0
+  image_picker: ^0.8.5
   nb_utils: ^4.5.0
   path_provider: ^2.0.9
   share_plus: ^4.0.4

ios/Classes/src/native_zxing.cpp

@@ -10,13 +10,13 @@ using namespace ZXing;
 extern "C"
 {
     FUNCTION_ATTRIBUTE
-    char *zxingVersion()
+    char *version()
     {
         return "1.3.0";
     }
 
     FUNCTION_ATTRIBUTE
-    struct CodeResult zxingRead(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled)
+    struct CodeResult readBarcode(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled)
     {
         long long start = get_now();
 
@@ -52,7 +52,50 @@ extern "C"
     }
 
     FUNCTION_ATTRIBUTE
-    struct EncodeResult zxingEncode(char *contents, int width, int height, int format, int margin, int eccLevel, int logEnabled)
+    struct CodeResult* readBarcodes(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled)
+    {
+        long long start = get_now();
+
+        long length = width * height;
+        uint8_t *data = new uint8_t[length];
+        memcpy(data, bytes, length);
+
+        BarcodeFormats formats = BarcodeFormat(format); // BarcodeFormat::Any;
+        DecodeHints hints = DecodeHints().setTryHarder(false).setTryRotate(true).setFormats(formats);
+        ImageView image{data, width, height, ImageFormat::Lum};
+        if (cropWidth > 0 && cropHeight > 0 && cropWidth < width && cropHeight < height)
+        {
+            image = image.cropped(width / 2 - cropWidth / 2, height / 2 - cropHeight / 2, cropWidth, cropHeight);
+        }
+        Results results = ReadBarcodes(image, hints);
+
+        struct CodeResult *codes = new struct CodeResult [results.size()];
+        int i = 0;
+        for (auto &result : results)
+        {
+            struct CodeResult code = {false, nullptr};
+            if (result.isValid())
+            {
+                code.isValid = result.isValid();
+                code.text = new char[result.text().length() + 1];
+                std::string text = std::string(result.text().begin(), result.text().end());
+                strcpy(code.text, text.c_str());
+                code.format = Format(static_cast<int>(result.format()));
+                codes[i] = code;
+                i++;
+            }
+        }
+
+        int evalInMillis = static_cast<int>(get_now() - start);
+        if (logEnabled)
+        {
+            platform_log("zxingRead: %d ms", evalInMillis);
+        }
+        return codes;
+    }
+
+    FUNCTION_ATTRIBUTE
+    struct EncodeResult encodeBarcode(char *contents, int width, int height, int format, int margin, int eccLevel, int logEnabled)
     {
         long long start = get_now();
 

ios/Classes/src/native_zxing.h

@@ -48,7 +48,7 @@ extern "C"
      *
      * @return The version of the zxing library.
      */
-    char *zxingVersion();
+    char *version();
 
     /**
      * @brief Reads barcode from image.
@@ -61,7 +61,20 @@ extern "C"
      * @param logEnabled Log enabled.
      * @return Barcode result.
      */
-    struct CodeResult zxingRead(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled);
+    struct CodeResult readBarcode(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled);
+
+    /**
+     * @brief Reads barcodes from image.
+     * @param bytes Image bytes.
+     * @param format The format of the barcode
+     * @param width Image width.
+     * @param height Image height.
+     * @param cropWidth Crop width.
+     * @param cropHeight Crop height.
+     * @param logEnabled Log enabled.
+     * @return Barcode results.
+     */ 
+    struct CodeResult* readBarcodes(char *bytes, int format, int width, int height, int cropWidth, int cropHeight, int logEnabled);
 
     /**
      * @brief Encode a string into a barcode
@@ -74,7 +87,7 @@ extern "C"
      * @param eccLevel The error correction level of the barcode. Used for Aztec, PDF417, and QRCode only, [0-8].
      * @return The barcode data
      */
-    struct EncodeResult zxingEncode(char *contents, int width, int height, int format, int margin, int eccLevel, int logEnabled);
+    struct EncodeResult encodeBarcode(char *contents, int width, int height, int format, int margin, int eccLevel, int logEnabled);
 
 #ifdef __cplusplus
 }

lib/flutter_zxing.dart

@@ -4,10 +4,15 @@ import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:ffi/ffi.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 import 'generated_bindings.dart';
 
+export 'generated_bindings.dart';
+export 'zxing_reader_widget.dart';
+export 'zxing_writer_widget.dart';
+
 class FlutterZxing {
   static const MethodChannel _channel = MethodChannel('flutter_zxing');
 
@@ -20,19 +25,27 @@ class FlutterZxing {
 
   static bool logEnabled = true;
 
-  static String zxingVersion() {
-    return bindings.zxingVersion().cast<Utf8>().toDartString();
+  static String version() {
+    return bindings.version().cast<Utf8>().toDartString();
   }
 
-  static CodeResult zxingRead(Uint8List bytes, int format, int width,
+  static CodeResult readBarcode(Uint8List bytes, int format, int width,
       int height, int cropWidth, int cropHeight) {
-    return bindings.zxingRead(bytes.allocatePointer(), format, width, height,
+    return bindings.readBarcode(bytes.allocatePointer(), format, width, height,
         cropWidth, cropHeight, _logEnabled);
   }
 
-  static EncodeResult zxingEncode(String contents, int width, int height,
+  static List<CodeResult> readBarcodes(Uint8List bytes, int format, int width,
+      int height, int cropWidth, int cropHeight) {
+    final result = bindings.readBarcodes(bytes.allocatePointer(), format, width,
+        height, cropWidth, cropHeight, _logEnabled);
+    debugPrint(result.toString());
+    return [];
+  }
+
+  static EncodeResult encodeBarcode(String contents, int width, int height,
       int format, int margin, int eccLevel) {
-    var result = bindings.zxingEncode(contents.toNativeUtf8().cast<Int8>(),
+    var result = bindings.encodeBarcode(contents.toNativeUtf8().cast<Int8>(),
         width, height, format, margin, eccLevel, _logEnabled);
     return result;
   }
@@ -70,7 +83,8 @@ extension Encode on EncodeResult {
 
 extension Code on CodeResult {
   bool get isValidBool => isValid == 1;
-  String get textString => text.cast<Utf8>().toDartString();
+  String? get textString =>
+      text == nullptr ? null : text.cast<Utf8>().toDartString();
 
   String get formatString {
     return CodeFormat.formatName(format);

lib/generated_bindings.dart

@@ -22,15 +22,14 @@ class GeneratedBindings {
   /// Returns the version of the zxing library.
   ///
   /// @return The version of the zxing library.
-  ffi.Pointer<ffi.Int8> zxingVersion() {
-    return _zxingVersion();
+  ffi.Pointer<ffi.Int8> version() {
+    return _version();
   }
 
-  late final _zxingVersionPtr =
-      _lookup<ffi.NativeFunction<ffi.Pointer<ffi.Int8> Function()>>(
-          'zxingVersion');
-  late final _zxingVersion =
-      _zxingVersionPtr.asFunction<ffi.Pointer<ffi.Int8> Function()>();
+  late final _versionPtr =
+      _lookup<ffi.NativeFunction<ffi.Pointer<ffi.Int8> Function()>>('version');
+  late final _version =
+      _versionPtr.asFunction<ffi.Pointer<ffi.Int8> Function()>();
 
   /// @brief Reads barcode from image.
   /// @param bytes Image bytes.
@@ -41,7 +40,7 @@ class GeneratedBindings {
   /// @param cropHeight Crop height.
   /// @param logEnabled Log enabled.
   /// @return Barcode result.
-  CodeResult zxingRead(
+  CodeResult readBarcode(
     ffi.Pointer<ffi.Int8> bytes,
     int format,
     int width,
@@ -50,7 +49,7 @@ class GeneratedBindings {
     int cropHeight,
     int logEnabled,
   ) {
-    return _zxingRead(
+    return _readBarcode(
       bytes,
       format,
       width,
@@ -61,14 +60,57 @@ class GeneratedBindings {
     );
   }
 
-  late final _zxingReadPtr = _lookup<
+  late final _readBarcodePtr = _lookup<
       ffi.NativeFunction<
           CodeResult Function(ffi.Pointer<ffi.Int8>, ffi.Int32, ffi.Int32,
-              ffi.Int32, ffi.Int32, ffi.Int32, ffi.Int32)>>('zxingRead');
-  late final _zxingRead = _zxingReadPtr.asFunction<
+              ffi.Int32, ffi.Int32, ffi.Int32, ffi.Int32)>>('readBarcode');
+  late final _readBarcode = _readBarcodePtr.asFunction<
       CodeResult Function(
           ffi.Pointer<ffi.Int8>, int, int, int, int, int, int)>();
 
+  /// @brief Reads barcodes from image.
+  /// @param bytes Image bytes.
+  /// @param format The format of the barcode
+  /// @param width Image width.
+  /// @param height Image height.
+  /// @param cropWidth Crop width.
+  /// @param cropHeight Crop height.
+  /// @param logEnabled Log enabled.
+  /// @return Barcode results.
+  ffi.Pointer<CodeResult> readBarcodes(
+    ffi.Pointer<ffi.Int8> bytes,
+    int format,
+    int width,
+    int height,
+    int cropWidth,
+    int cropHeight,
+    int logEnabled,
+  ) {
+    return _readBarcodes(
+      bytes,
+      format,
+      width,
+      height,
+      cropWidth,
+      cropHeight,
+      logEnabled,
+    );
+  }
+
+  late final _readBarcodesPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Pointer<CodeResult> Function(
+              ffi.Pointer<ffi.Int8>,
+              ffi.Int32,
+              ffi.Int32,
+              ffi.Int32,
+              ffi.Int32,
+              ffi.Int32,
+              ffi.Int32)>>('readBarcodes');
+  late final _readBarcodes = _readBarcodesPtr.asFunction<
+      ffi.Pointer<CodeResult> Function(
+          ffi.Pointer<ffi.Int8>, int, int, int, int, int, int)>();
+
   /// @brief Encode a string into a barcode
   /// @param contents The string to encode
   /// @param width The width of the barcode
@@ -78,7 +120,7 @@ class GeneratedBindings {
   /// @param logEnabled Log enabled.
   /// @param eccLevel The error correction level of the barcode. Used for Aztec, PDF417, and QRCode only, [0-8].
   /// @return The barcode data
-  EncodeResult zxingEncode(
+  EncodeResult encodeBarcode(
     ffi.Pointer<ffi.Int8> contents,
     int width,
     int height,
@@ -87,7 +129,7 @@ class GeneratedBindings {
     int eccLevel,
     int logEnabled,
   ) {
-    return _zxingEncode(
+    return _encodeBarcode(
       contents,
       width,
       height,
@@ -98,11 +140,11 @@ class GeneratedBindings {
     );
   }
 
-  late final _zxingEncodePtr = _lookup<
+  late final _encodeBarcodePtr = _lookup<
       ffi.NativeFunction<
           EncodeResult Function(ffi.Pointer<ffi.Int8>, ffi.Int32, ffi.Int32,
-              ffi.Int32, ffi.Int32, ffi.Int32, ffi.Int32)>>('zxingEncode');
-  late final _zxingEncode = _zxingEncodePtr.asFunction<
+              ffi.Int32, ffi.Int32, ffi.Int32, ffi.Int32)>>('encodeBarcode');
+  late final _encodeBarcode = _encodeBarcodePtr.asFunction<
       EncodeResult Function(
           ffi.Pointer<ffi.Int8>, int, int, int, int, int, int)>();
 }

lib/isolate_utils.dart

@@ -63,7 +63,7 @@ class IsolateUtils {
           final cropSize =
               (min(image.width, image.height) * cropPercent).round();
 
-          final result = FlutterZxing.zxingRead(bytes, isolateData.format,
+          final result = FlutterZxing.readBarcode(bytes, isolateData.format,
               image.width, image.height, cropSize, cropSize);
 
           isolateData.responsePort?.send(result);

lib/zxing_reader_widget.dart

@@ -8,7 +8,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_beep/flutter_beep.dart';
 import 'flutter_zxing.dart';
-import 'generated_bindings.dart';
 
 import 'isolate_utils.dart';
 import 'scanner_overlay.dart';

lib/zxing_writer_widget.dart

@@ -4,7 +4,6 @@ import 'package:flutter/material.dart';
 import 'package:image/image.dart' as imglib;
 
 import 'flutter_zxing.dart';
-import 'generated_bindings.dart';
 
 class ZxingWriterWidget extends StatefulWidget {
   const ZxingWriterWidget({
@@ -71,7 +70,7 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
                 decoration: InputDecoration(
                   border: const OutlineInputBorder(),
                   filled: true,
-                  hintText: 'Enter text to encode',
+                  hintText: 'Enter text to create a barcode',
                   counterText:
                       '${_textController.value.text.length} / $_maxTextLength',
                 ),
@@ -85,7 +84,7 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
                     final text = _textController.value.text;
                     const width = 300;
                     const height = 300;
-                    final result = FlutterZxing.zxingEncode(
+                    final result = FlutterZxing.encodeBarcode(
                         text, width, height, _codeFormat, 5, 0);
                     String? error;
                     if (result.isValidBool) {
@@ -107,7 +106,7 @@ class _ZxingWriterWidgetState extends State<ZxingWriterWidget>
                     }
                   }
                 },
-                child: const Text('Encode'),
+                child: const Text('Create'),
               ),
               const SizedBox(height: 20),
             ],

pubspec.yaml

@@ -8,7 +8,7 @@ environment:
   flutter: ">=2.5.0"
 
 dependencies:
-  camera: 0.9.4+19
+  camera: ^0.9.4
   ffi: ^1.1.2
   flutter:
     sdk: flutter