lightweight_barcode_scanner 0.4.0

Lightweight, offline, ML-free barcode & QR scanner for Flutter powered by a shared ZXing-C++ core.

0.4.0

• ScanMode.distinct: keeps scanning like continuous, but only reports a barcode whose format + value differs from the last one reported, so a symbol held in view fires onDetected once instead of every time the duplicate filter expires. Filtered in Dart; the native side runs it as continuous.

0.3.0

• Auto zoom, on by default (ScannerOptions.autoZoom, an AutoZoom mode: enabled, enabledIosOnly, enabledAndroidOnly or disabled, so the ramp can be kept on the platform whose lens needs it). When nothing decodes for about a second the scanner zooms in gradually, up to an absolute 2x, and steps back to its resting point on the first read. Linear symbologies are limited by focus rather than resolution: at 1x the only way to fill the frame with a barcode is to move inside the lens's minimum focus distance, where it can no longer focus. setZoom hands control back to the app and switches it off for the session. See "Auto zoom" in the README for the measurements behind it.
• The camera now opens at 1.4x (ScannerOptions.initialZoom), which is also where auto zoom rests. 1x is the ratio that forces the user closest to the symbol, and it made handing the framing back a visible lurch. Pass initialZoom: 1 for the previous full field of view.
• The ramp runs in Dart, over the existing setZoom call, so neither platform carries its own copy of the logic.

0.2.1

• Fixed the Android camera preview opening sideways. A SurfaceTexture-backed CameraX preview is already rotated by the producer, and the plugin rotated it a second time in Dart. Android now reports the already-rotated preview size and a texture rotation of 0; iOS, where the capture buffer really does reach Flutter untouched, is unchanged. Decoding was never affected - the analysis stream is a separate buffer with its own per-frame rotation.

0.2.0

• Swift Package Manager support on iOS. The plugin now ships a Package.swift alongside the podspec; Flutter picks whichever integration your project uses and neither needs configuration. SPM requires Flutter 3.44 or newer, CocoaPods keeps working everywhere.
  • The iOS sources moved into the Swift package layout (ios/lightweight_barcode_scanner/Sources/), split into an Objective-C++/C++ target (lbs_core) and a Swift target, because SPM will not mix languages inside one target.
  • tool/generate_ios_sources.sh now also mirrors the shared core's headers into the package. SPM rejects a header search path that leaves the package root, and the C++ core has to stay at the package root for the Android build and the host tests.
• Fixed the LICENSE file so pub.dev recognises it as Apache-2.0 again. The licence text was intact, but a duplicated boilerplate block after the appendix pushed it past pub's "unclaimed text" limit and the package was listed with an unknown licence.
• Added repository and issue_tracker to the pubspec.

0.1.0

Initial release.

• Live scanning with a shared ZXing-C++ reader core: CameraX on Android, AVFoundation on iOS. Camera frames are decoded natively; only results cross into Dart.
• QR Code (including Micro QR and rMQR), EAN-8, EAN-13, UPC-A, UPC-E, Code 39, Code 93, Code 128, ITF, Codabar, GS1 DataBar and DataBar Expanded.
• Texture-based preview, torch, zoom, tap-to-focus, camera switching.
• Region of interest, frame throttling, duplicate suppression and format filtering, all applied natively.
• Single, continuous and multi-barcode scan modes.
• Static image decoding over dart:ffi (BarcodeScanner.decodeImage).
• Explicit scanner state machine and error model.