Flutter plugin for scanning and generating QR codes using the ZXing library, supporting Android, iOS, and desktop platforms
flutterbarcode-generatorbarcode-scannergeneratorqrqrcodeqrcode-generatorqrcode-scannerscannerzxingbarcodezxscanner
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120 lines
3.2 KiB
120 lines
3.2 KiB
import 'dart:async'; |
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import 'dart:ffi'; |
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import 'dart:io'; |
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import 'dart:typed_data'; |
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import 'package:ffi/ffi.dart'; |
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import 'package:flutter/services.dart'; |
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import 'generated_bindings.dart'; |
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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 bindings = GeneratedBindings(dylib); |
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static String zxingVersion() { |
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return bindings.zxingVersion().cast<Utf8>().toDartString(); |
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} |
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static CodeResult zxingRead( |
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Uint8List bytes, int width, int height, int cropSize) { |
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return bindings.zxingRead(bytes.allocatePointer(), width, height, cropSize); |
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} |
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static EncodeResult zxingEncode(String contents, int width, int height, |
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int format, int margin, int eccLevel) { |
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var result = bindings.zxingEncode(contents.toNativeUtf8().cast<Int8>(), |
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width, height, format, margin, eccLevel); |
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return result; |
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} |
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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<Int8> allocatePointer() { |
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final blob = calloc<Int8>(length); |
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final blobBytes = blob.asTypedList(length); |
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blobBytes.setAll(0, this); |
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return blob; |
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} |
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} |
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extension Encode on EncodeResult { |
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bool get isValidBool => isValid == 1; |
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Uint32List get bytes => data.asTypedList(length); |
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String get errorMessage => error.cast<Utf8>().toDartString(); |
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} |
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extension Code on CodeResult { |
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bool get isValidBool => isValid == 1; |
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String get textString => text.cast<Utf8>().toDartString(); |
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String get formatString { |
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return CodeFormat.formatName(format); |
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} |
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} |
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extension CodeFormat on Format { |
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static String formatName(int format) => formatNames[format] ?? 'Unknown'; |
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String get name => formatNames[this] ?? 'Unknown'; |
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static final formatNames = { |
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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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static final writerFormats = [ |
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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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