Khoren Markosyan
2 years ago
21 changed files with 314 additions and 277 deletions
@ -1,242 +1,7 @@
|
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import 'dart:async'; |
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import 'dart:ffi'; |
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import 'dart:io'; |
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import 'dart:isolate'; |
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import 'dart:typed_data'; |
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|
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import 'package:camera/camera.dart'; |
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import 'package:ffi/ffi.dart'; |
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import 'package:flutter/services.dart'; |
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import 'package:image/image.dart' as imglib; |
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import 'generated_bindings.dart'; |
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import 'isolate_utils.dart'; |
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export 'generated_bindings.dart'; |
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export 'image_converter.dart'; |
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export 'reader_widget.dart'; |
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export 'scanner_overlay.dart'; |
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export 'writer_widget.dart'; |
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// TODO: fix below warning from lint |
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// ignore: avoid_classes_with_only_static_members |
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/// The main class for reading barcodes from images or camera. |
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class FlutterZxing { |
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static const MethodChannel _channel = MethodChannel('flutter_zxing'); |
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static Future<String?> get platformVersion async { |
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final String? version = await _channel.invokeMethod('getPlatformVersion'); |
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return version; |
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} |
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static final GeneratedBindings bindings = GeneratedBindings(dylib); |
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static IsolateUtils? isolateUtils; |
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/// Enables or disables the logging of the library |
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static void setLogEnabled(bool enabled) => |
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bindings.setLogEnabled(enabled ? 1 : 0); |
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/// Returns a version of the zxing library |
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static String version() => bindings.version().cast<Utf8>().toDartString(); |
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/// Starts reading barcode from the camera |
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static Future<void> startCameraProcessing() async { |
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// Spawn a new isolate |
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isolateUtils = IsolateUtils(); |
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await isolateUtils?.startReadingBarcode(); |
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} |
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/// Stops reading barcode from the camera |
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static void stopCameraProcessing() => isolateUtils?.stopReadingBarcode(); |
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/// Reads barcode from String image path |
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static Future<CodeResult?> readImagePathString( |
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String path, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) => |
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readImagePath(XFile(path), |
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format: format, cropWidth: cropWidth, cropHeight: cropHeight); |
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/// Reads barcode from XFile image path |
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static Future<CodeResult?> readImagePath( |
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XFile path, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) async { |
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final Uint8List imageBytes = await path.readAsBytes(); |
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final imglib.Image? image = imglib.decodeImage(imageBytes); |
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if (image == null) { |
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return null; |
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} |
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return readBarcode( |
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image.getBytes(format: imglib.Format.luminance), |
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format, |
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image.width, |
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image.height, |
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cropWidth, |
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cropHeight, |
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); |
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} |
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/// Reads barcode from image url |
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static Future<CodeResult?> readImageUrl( |
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String url, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) async { |
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final Uint8List imageBytes = |
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(await NetworkAssetBundle(Uri.parse(url)).load(url)) |
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.buffer |
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.asUint8List(); |
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final imglib.Image? image = imglib.decodeImage(imageBytes); |
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if (image == null) { |
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return null; |
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} |
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return readBarcode( |
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image.getBytes(format: imglib.Format.luminance), |
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format, |
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image.width, |
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image.height, |
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cropWidth, |
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cropHeight, |
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); |
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} |
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|
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static CodeResult readBarcode(Uint8List bytes, int format, int width, |
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int height, int cropWidth, int cropHeight) { |
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return bindings.readBarcode( |
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bytes.allocatePointer(), format, width, height, cropWidth, cropHeight); |
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} |
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static List<CodeResult> readBarcodes(Uint8List bytes, int format, int width, |
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int height, int cropWidth, int cropHeight) { |
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final CodeResults result = bindings.readBarcodes( |
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bytes.allocatePointer(), format, width, height, cropWidth, cropHeight); |
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final List<CodeResult> results = <CodeResult>[]; |
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for (int i = 0; i < result.count; i++) { |
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results.add(result.results.elementAt(i).ref); |
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} |
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return results; |
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} |
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static EncodeResult encodeBarcode(String contents, int width, int height, |
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int format, int margin, int eccLevel) { |
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final EncodeResult result = bindings.encodeBarcode( |
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contents.toNativeUtf8().cast<Char>(), |
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width, |
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height, |
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format, |
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margin, |
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eccLevel); |
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return result; |
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} |
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|
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static Future<CodeResult> processCameraImage(CameraImage image, |
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{int format = Format.Any, double cropPercent = 0.5}) async { |
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final IsolateData isolateData = IsolateData(image, format, cropPercent); |
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final CodeResult result = await _inference(isolateData); |
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return result; |
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} |
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|
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/// Runs inference in another isolate |
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static Future<CodeResult> _inference(IsolateData isolateData) async { |
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final ReceivePort responsePort = ReceivePort(); |
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isolateUtils?.sendPort |
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?.send(isolateData..responsePort = responsePort.sendPort); |
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// TODO: fix below warning from lint |
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// ignore: always_specify_types |
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final results = await responsePort.first; |
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return results; |
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} |
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static String formatName(int format) => _formatNames[format] ?? 'Unknown'; |
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} |
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// Getting a library that holds needed symbols |
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DynamicLibrary _openDynamicLibrary() { |
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if (Platform.isAndroid) { |
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return DynamicLibrary.open('libflutter_zxing.so'); |
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} else if (Platform.isWindows) { |
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return DynamicLibrary.open('flutter_zxing_windows_plugin.dll'); |
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} |
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return DynamicLibrary.process(); |
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} |
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DynamicLibrary dylib = _openDynamicLibrary(); |
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extension Uint8ListBlobConversion on Uint8List { |
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/// Allocates a pointer filled with the Uint8List data. |
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Pointer<Char> allocatePointer() { |
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final Pointer<Int8> blob = calloc<Int8>(length); |
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final Int8List blobBytes = blob.asTypedList(length); |
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blobBytes.setAll(0, this); |
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return blob.cast<Char>(); |
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} |
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} |
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extension CodeExt on CodeResult { |
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bool get isValidBool => isValid == 1; |
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String? get textString => |
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text == nullptr ? null : text.cast<Utf8>().toDartString(); |
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String get formatString => FlutterZxing.formatName(format); |
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} |
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extension EncodeExt on EncodeResult { |
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bool get isValidBool => isValid == 1; |
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String? get textString => |
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text == nullptr ? null : text.cast<Utf8>().toDartString(); |
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String get formatString => FlutterZxing.formatName(format); |
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Uint32List get bytes => data.cast<Uint32>().asTypedList(length); |
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String get errorMessage => error.cast<Utf8>().toDartString(); |
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} |
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extension CodeFormat on Format { |
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String get name => _formatNames[this] ?? 'Unknown'; |
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static final List<int> writerFormats = <int>[ |
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Format.QRCode, |
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Format.DataMatrix, |
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Format.Aztec, |
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Format.PDF417, |
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Format.Codabar, |
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Format.Code39, |
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Format.Code93, |
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Format.Code128, |
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Format.EAN8, |
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Format.EAN13, |
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Format.ITF, |
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Format.UPCA, |
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Format.UPCE, |
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// Format.DataBar, |
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// Format.DataBarExpanded, |
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// Format.MaxiCode, |
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]; |
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} |
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final Map<int, String> _formatNames = <int, String>{ |
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Format.None: 'None', |
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Format.Aztec: 'Aztec', |
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Format.Codabar: 'CodaBar', |
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Format.Code39: 'Code39', |
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Format.Code93: 'Code93', |
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Format.Code128: 'Code128', |
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Format.DataBar: 'DataBar', |
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Format.DataBarExpanded: 'DataBarExpanded', |
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Format.DataMatrix: 'DataMatrix', |
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Format.EAN8: 'EAN8', |
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Format.EAN13: 'EAN13', |
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Format.ITF: 'ITF', |
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Format.MaxiCode: 'MaxiCode', |
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Format.PDF417: 'PDF417', |
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Format.QRCode: 'QR Code', |
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Format.UPCA: 'UPCA', |
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Format.UPCE: 'UPCE', |
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Format.OneDCodes: 'OneD', |
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Format.TwoDCodes: 'TwoD', |
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Format.Any: 'Any', |
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}; |
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export 'src/logic/zxing.dart'; |
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export 'src/ui/reader_widget.dart'; |
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export 'src/ui/scanner_overlay.dart'; |
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export 'src/ui/writer_widget.dart'; |
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export 'src/utils/extentions.dart'; |
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export 'src/utils/image_converter.dart'; |
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@ -0,0 +1,13 @@
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part of 'zxing.dart'; |
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EncodeResult encodeBarcode(String contents, int width, int height, int format, |
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int margin, int eccLevel) { |
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return bindings.encodeBarcode( |
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contents.toNativeUtf8().cast<Char>(), |
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width, |
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height, |
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format, |
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margin, |
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eccLevel, |
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); |
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} |
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@ -0,0 +1,74 @@
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part of 'zxing.dart'; |
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/// Reads barcode from String image path |
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Future<CodeResult?> readImagePathString( |
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String path, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) => |
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readImagePath(XFile(path), |
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format: format, cropWidth: cropWidth, cropHeight: cropHeight); |
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|
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/// Reads barcode from XFile image path |
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Future<CodeResult?> readImagePath( |
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XFile path, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) async { |
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final Uint8List imageBytes = await path.readAsBytes(); |
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final imglib.Image? image = imglib.decodeImage(imageBytes); |
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if (image == null) { |
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return null; |
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} |
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return readBarcode( |
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image.getBytes(format: imglib.Format.luminance), |
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format, |
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image.width, |
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image.height, |
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cropWidth, |
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cropHeight, |
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); |
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} |
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|
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/// Reads barcode from image url |
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Future<CodeResult?> readImageUrl( |
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String url, { |
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int format = Format.Any, |
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int cropWidth = 0, |
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int cropHeight = 0, |
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}) async { |
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final Uint8List imageBytes = |
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(await NetworkAssetBundle(Uri.parse(url)).load(url)).buffer.asUint8List(); |
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final imglib.Image? image = imglib.decodeImage(imageBytes); |
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if (image == null) { |
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return null; |
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} |
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return readBarcode( |
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image.getBytes(format: imglib.Format.luminance), |
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format, |
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image.width, |
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image.height, |
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cropWidth, |
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cropHeight, |
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); |
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} |
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|
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// Reads barcode from Uint8List image bytes |
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CodeResult readBarcode( |
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Uint8List bytes, |
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int format, |
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int width, |
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int height, |
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int cropWidth, |
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int cropHeight, |
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) => |
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bindings.readBarcode( |
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bytes.allocatePointer(), |
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format, |
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width, |
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height, |
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cropWidth, |
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cropHeight, |
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); |
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@ -0,0 +1,13 @@
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part of 'zxing.dart'; |
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// Reads barcodes from Uint8List image bytes |
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List<CodeResult> readBarcodes(Uint8List bytes, int format, int width, |
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int height, int cropWidth, int cropHeight) { |
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final CodeResults result = bindings.readBarcodes( |
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bytes.allocatePointer(), format, width, height, cropWidth, cropHeight); |
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final List<CodeResult> results = <CodeResult>[]; |
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for (int i = 0; i < result.count; i++) { |
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results.add(result.results.elementAt(i).ref); |
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} |
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return results; |
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} |
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@ -0,0 +1,15 @@
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part of 'zxing.dart'; |
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final GeneratedBindings bindings = GeneratedBindings(dylib); |
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// Getting a library that holds needed symbols |
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DynamicLibrary _openDynamicLibrary() { |
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if (Platform.isAndroid) { |
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return DynamicLibrary.open('libflutter_zxing.so'); |
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} else if (Platform.isWindows) { |
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return DynamicLibrary.open('flutter_zxing_windows_plugin.dll'); |
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} |
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return DynamicLibrary.process(); |
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} |
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DynamicLibrary dylib = _openDynamicLibrary(); |
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@ -0,0 +1,28 @@
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part of 'zxing.dart'; |
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IsolateUtils? isolateUtils; |
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/// Starts reading barcode from the camera |
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Future<void> startCameraProcessing() async { |
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isolateUtils = IsolateUtils(); |
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await isolateUtils?.startReadingBarcode(); |
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} |
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/// Stops reading barcode from the camera |
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void stopCameraProcessing() => isolateUtils?.stopReadingBarcode(); |
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Future<CodeResult> processCameraImage(CameraImage image, |
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{int format = Format.Any, double cropPercent = 0.5}) async { |
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final IsolateData isolateData = IsolateData(image, format, cropPercent); |
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final CodeResult result = await _inference(isolateData); |
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return result; |
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} |
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|
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/// Runs inference in another isolate |
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Future<CodeResult> _inference(IsolateData isolateData) async { |
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final ReceivePort responsePort = ReceivePort(); |
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isolateUtils?.sendPort |
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?.send(isolateData..responsePort = responsePort.sendPort); |
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final dynamic results = await responsePort.first; |
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return results; |
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} |
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@ -0,0 +1,29 @@
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import 'dart:ffi'; |
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import 'dart:io'; |
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import 'dart:isolate'; |
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import 'dart:typed_data'; |
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|
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import 'package:camera/camera.dart'; |
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import 'package:ffi/ffi.dart'; |
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import 'package:flutter/services.dart'; |
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import 'package:image/image.dart' as imglib; |
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|
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import '../../generated_bindings.dart'; |
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import '../utils/extentions.dart'; |
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import '../utils/isolate_utils.dart'; |
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part 'barcode_encoder.dart'; |
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part 'barcode_reader.dart'; |
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part 'barcodes_reader.dart'; |
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part 'bindings.dart'; |
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part 'camera_stream.dart'; |
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/// Returns a version of the zxing library |
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String zxingVersion() => bindings.version().cast<Utf8>().toDartString(); |
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/// Enables or disables the logging of the library |
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void setZxingLogEnabled(bool enabled) => |
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bindings.setLogEnabled(enabled ? 1 : 0); |
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/// Returns a readable barcode format name |
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String barcodeFormatName(int format) => formatNames[format] ?? 'Unknown'; |
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@ -0,0 +1,78 @@
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import 'dart:ffi'; |
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import 'dart:typed_data'; |
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|
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import 'package:ffi/ffi.dart'; |
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|
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import '../../flutter_zxing.dart'; |
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|
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extension Uint8ListBlobConversion on Uint8List { |
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/// Allocates a pointer filled with the Uint8List data. |
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Pointer<Char> allocatePointer() { |
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final Pointer<Int8> blob = calloc<Int8>(length); |
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final Int8List blobBytes = blob.asTypedList(length); |
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blobBytes.setAll(0, this); |
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return blob.cast<Char>(); |
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} |
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} |
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|
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extension CodeExt on CodeResult { |
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bool get isValidBool => isValid == 1; |
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String? get textString => |
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text == nullptr ? null : text.cast<Utf8>().toDartString(); |
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String get formatString => barcodeFormatName(format); |
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} |
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|
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extension EncodeExt on EncodeResult { |
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bool get isValidBool => isValid == 1; |
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String? get textString => |
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text == nullptr ? null : text.cast<Utf8>().toDartString(); |
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String get formatString => barcodeFormatName(format); |
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Uint32List get bytes => data.cast<Uint32>().asTypedList(length); |
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String get errorMessage => error.cast<Utf8>().toDartString(); |
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} |
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|
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extension CodeFormat on Format { |
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String get name => formatNames[this] ?? 'Unknown'; |
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|
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static final List<int> writerFormats = <int>[ |
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Format.QRCode, |
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Format.DataMatrix, |
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Format.Aztec, |
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Format.PDF417, |
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Format.Codabar, |
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Format.Code39, |
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Format.Code93, |
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Format.Code128, |
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Format.EAN8, |
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Format.EAN13, |
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Format.ITF, |
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Format.UPCA, |
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Format.UPCE, |
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// Format.DataBar, |
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// Format.DataBarExpanded, |
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// Format.MaxiCode, |
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]; |
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} |
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|
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final Map<int, String> formatNames = <int, String>{ |
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Format.None: 'None', |
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Format.Aztec: 'Aztec', |
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Format.Codabar: 'CodaBar', |
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Format.Code39: 'Code39', |
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Format.Code93: 'Code93', |
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Format.Code128: 'Code128', |
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Format.DataBar: 'DataBar', |
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Format.DataBarExpanded: 'DataBarExpanded', |
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Format.DataMatrix: 'DataMatrix', |
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Format.EAN8: 'EAN8', |
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Format.EAN13: 'EAN13', |
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Format.ITF: 'ITF', |
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Format.MaxiCode: 'MaxiCode', |
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Format.PDF417: 'PDF417', |
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Format.QRCode: 'QR Code', |
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Format.UPCA: 'UPCA', |
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Format.UPCE: 'UPCE', |
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Format.OneDCodes: 'OneD', |
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Format.TwoDCodes: 'TwoD', |
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Format.Any: 'Any', |
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}; |
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