From a336ed2213e2401c19df80e84b0535946e12f9f1 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Mon, 20 Oct 2025 13:16:52 +0000 Subject: [PATCH 1/6] Initial plan From 538c3566b356b41b099a9fb01d8af6928bcf7948 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Mon, 20 Oct 2025 13:26:00 +0000 Subject: [PATCH 2/6] Add BarcodeGenerator API for saving barcode images Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com> --- README.md | 135 ++++++++++++++++++ .../BarcodeImageExtensions.ios.maccatalyst.cs | 76 ++++++++++ ZXing.Net.MAUI/BarcodeGenerator.cs | 94 ++++++++++++ ZXing.Net.MAUI/BarcodeImageFormat.cs | 38 +++++ .../Net/BarcodeImageExtensions.net.cs | 30 ++++ .../Android/BarcodeImageExtensions.android.cs | 67 +++++++++ .../Windows/BarcodeImageExtensions.windows.cs | 88 ++++++++++++ 7 files changed, 528 insertions(+) create mode 100644 ZXing.Net.MAUI/Apple/BarcodeImageExtensions.ios.maccatalyst.cs create mode 100644 ZXing.Net.MAUI/BarcodeGenerator.cs create mode 100644 ZXing.Net.MAUI/BarcodeImageFormat.cs create mode 100644 ZXing.Net.MAUI/Net/BarcodeImageExtensions.net.cs create mode 100644 ZXing.Net.MAUI/Platforms/Android/BarcodeImageExtensions.android.cs create mode 100644 ZXing.Net.MAUI/Platforms/Windows/BarcodeImageExtensions.windows.cs diff --git a/README.md b/README.md index 2fbe580..1a5c982 100644 --- a/README.md +++ b/README.md @@ -156,6 +156,141 @@ The `BarcodeGeneratorView` supports UTF-8 character encoding by default, which a The `CharacterSet` property defaults to "UTF-8" if not specified. Other common values include "ISO-8859-1", "Shift_JIS", etc., depending on your barcode format requirements. +## Generating and Saving Barcode Images + +You can generate barcode images programmatically and save them to files or streams using the `BarcodeGenerator` class: + +```csharp +using ZXing.Net.Maui; + +// Create a barcode generator +var generator = new BarcodeGenerator +{ + Format = BarcodeFormat.QrCode, + Value = "https://dotnet.microsoft.com", + Width = 300, + Height = 300, + Margin = 10, + ForegroundColor = Colors.Black, + BackgroundColor = Colors.White +}; + +// Generate the barcode image +var barcodeImage = await generator.GenerateAsync("https://dotnet.microsoft.com"); + +// Save to file +await barcodeImage.SaveAsync("/path/to/barcode.png"); + +// Or save to a stream +using var stream = new MemoryStream(); +await barcodeImage.SaveAsync(stream, BarcodeImageFormat.Png); +``` + +### Supported Image Formats + +- **PNG** (all platforms) - Recommended for best quality +- **JPEG** (all platforms) - For smaller file sizes with compression +- **WebP** (Android only) +- **BMP** (Windows only) +- **GIF** (Windows only) +- **TIFF** (Windows only) + +### Required Permissions for Saving Files + +#### Android + +To save barcode images to external storage on Android, add the following permissions to your `AndroidManifest.xml` file (under the Platforms\Android folder) inside the `manifest` node: + +For Android 12 and below (API level 32 and below): +```xml + + +``` + +For Android 13+ (API level 33+), the above permissions are not needed if you're using app-specific directories or the MediaStore API. However, for accessing shared storage, you may need: +```xml + +``` + +**Note:** You must also request these permissions at runtime using `Permissions.RequestAsync()` and `Permissions.RequestAsync()`. + +For app-specific directories (recommended), no permissions are needed: +```csharp +// Save to app-specific directory (no permissions needed) +var path = Path.Combine(FileSystem.AppDataDirectory, "barcode.png"); +await barcodeImage.SaveAsync(path); +``` + +#### iOS + +To save barcode images to the photo library on iOS, add the following permission to your `info.plist` file (under the Platforms\iOS folder) inside the `dict` node: + +```xml +NSPhotoLibraryAddUsageDescription +This app needs permission to save barcode images to your photo library +``` + +For app-specific directories (recommended), no permissions are needed: +```csharp +// Save to app-specific directory (no permissions needed) +var path = Path.Combine(FileSystem.AppDataDirectory, "barcode.png"); +await barcodeImage.SaveAsync(path); +``` + +#### Windows + +No special permissions are required for Windows. However, to access certain folders like Documents or Pictures, you may need to declare capabilities in your `Package.appxmanifest`: + +```xml + + + + +``` + +For app-specific directories (recommended), no capabilities are needed: +```csharp +// Save to app-specific directory (no capabilities needed) +var path = Path.Combine(FileSystem.AppDataDirectory, "barcode.png"); +await barcodeImage.SaveAsync(path); +``` + +### Complete Example + +```csharp +using ZXing.Net.Maui; + +public async Task GenerateAndSaveBarcodeAsync() +{ + try + { + // Create the generator + var generator = new BarcodeGenerator + { + Format = BarcodeFormat.QrCode, + Width = 500, + Height = 500, + Margin = 10 + }; + + // Generate barcode + var barcode = await generator.GenerateAsync("https://github.com/Redth/ZXing.Net.Maui"); + + if (barcode != null) + { + // Save to app data directory (no permissions needed) + var filePath = Path.Combine(FileSystem.AppDataDirectory, "mybarcode.png"); + await barcode.SaveAsync(filePath); + + Console.WriteLine($"Barcode saved to: {filePath}"); + } + } + catch (Exception ex) + { + Console.WriteLine($"Error generating barcode: {ex.Message}"); + } +} +``` diff --git a/ZXing.Net.MAUI/Apple/BarcodeImageExtensions.ios.maccatalyst.cs b/ZXing.Net.MAUI/Apple/BarcodeImageExtensions.ios.maccatalyst.cs new file mode 100644 index 0000000..c0e885c --- /dev/null +++ b/ZXing.Net.MAUI/Apple/BarcodeImageExtensions.ios.maccatalyst.cs @@ -0,0 +1,76 @@ +using System; +using System.IO; +using System.Threading.Tasks; +using Foundation; +using UIKit; + +#nullable enable + +#if IOS || MACCATALYST +namespace ZXing.Net.Maui +{ + /// + /// Extension methods for saving barcode images on iOS and MacCatalyst + /// + public static class BarcodeImageExtensions + { + /// + /// Saves a barcode UIImage to a stream + /// + /// The image to save + /// The stream to write to + /// The image format (default: PNG) + /// The quality (0-1, default: 1.0) + public static async Task SaveAsync(this UIImage? image, Stream stream, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + if (image == null) + throw new ArgumentNullException(nameof(image)); + + if (stream == null) + throw new ArgumentNullException(nameof(stream)); + + NSData? data = format switch + { + BarcodeImageFormat.Png => image.AsPNG(), + BarcodeImageFormat.Jpeg => image.AsJPEG((nfloat)quality), + _ => image.AsPNG() + }; + + if (data == null) + throw new InvalidOperationException("Failed to convert image to data"); + + await Task.Run(() => + { + using var nsStream = data.AsStream(); + nsStream.CopyTo(stream); + }); + } + + /// + /// Saves a barcode UIImage to a file + /// + /// The image to save + /// The file path to write to + /// The image format (default: PNG) + /// The quality (0-1, default: 1.0) + public static async Task SaveAsync(this UIImage? image, string filePath, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + if (image == null) + throw new ArgumentNullException(nameof(image)); + + if (string.IsNullOrEmpty(filePath)) + throw new ArgumentNullException(nameof(filePath)); + + // Create directory if it doesn't exist + var directory = Path.GetDirectoryName(filePath); + if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory)) + { + Directory.CreateDirectory(directory); + } + + using var stream = File.Create(filePath); + await image.SaveAsync(stream, format, quality); + } + } +} +#endif diff --git a/ZXing.Net.MAUI/BarcodeGenerator.cs b/ZXing.Net.MAUI/BarcodeGenerator.cs new file mode 100644 index 0000000..3406ba8 --- /dev/null +++ b/ZXing.Net.MAUI/BarcodeGenerator.cs @@ -0,0 +1,94 @@ +using Microsoft.Maui.Graphics; +using System; +using System.IO; +using System.Linq; +using System.Threading.Tasks; +using ZXing; + +#nullable enable + +namespace ZXing.Net.Maui +{ + /// + /// Provides methods to generate barcode images programmatically + /// + public class BarcodeGenerator + { + private readonly BarcodeWriter writer; + + /// + /// Gets or sets the barcode format + /// + public BarcodeFormat Format { get; set; } = BarcodeFormat.QrCode; + + /// + /// Gets or sets the foreground color of the barcode + /// + public Color ForegroundColor { get; set; } = Colors.Black; + + /// + /// Gets or sets the background color of the barcode + /// + public Color BackgroundColor { get; set; } = Colors.White; + + /// + /// Gets or sets the width of the barcode in pixels + /// + public int Width { get; set; } = 300; + + /// + /// Gets or sets the height of the barcode in pixels + /// + public int Height { get; set; } = 300; + + /// + /// Gets or sets the margin around the barcode + /// + public int Margin { get; set; } = 1; + + /// + /// Gets or sets the character encoding for the barcode content + /// + public string CharacterSet { get; set; } = "UTF-8"; + + public BarcodeGenerator() + { + writer = new BarcodeWriter(); + } + + /// + /// Generates a barcode image from the given value + /// + /// The value to encode in the barcode + /// The generated barcode image + public NativePlatformImage? Generate(string value) + { + if (string.IsNullOrEmpty(value)) + return null; + + writer.Format = Format.ToZXingList().FirstOrDefault(); + writer.Options.Width = Width; + writer.Options.Height = Height; + writer.Options.Margin = Margin; + writer.ForegroundColor = ForegroundColor; + writer.BackgroundColor = BackgroundColor; + + if (!string.IsNullOrEmpty(CharacterSet)) + { + writer.Options.Hints[EncodeHintType.CHARACTER_SET] = CharacterSet; + } + + return writer.Write(value); + } + + /// + /// Generates a barcode image from the given value asynchronously + /// + /// The value to encode in the barcode + /// The generated barcode image + public Task GenerateAsync(string value) + { + return Task.Run(() => Generate(value)); + } + } +} diff --git a/ZXing.Net.MAUI/BarcodeImageFormat.cs b/ZXing.Net.MAUI/BarcodeImageFormat.cs new file mode 100644 index 0000000..0abaecf --- /dev/null +++ b/ZXing.Net.MAUI/BarcodeImageFormat.cs @@ -0,0 +1,38 @@ +namespace ZXing.Net.Maui +{ + /// + /// Represents the image format for saving barcode images + /// + public enum BarcodeImageFormat + { + /// + /// PNG format (lossless, recommended) + /// + Png, + + /// + /// JPEG format (lossy compression) + /// + Jpeg, + + /// + /// WebP format (Android only) + /// + Webp, + + /// + /// BMP format (Windows only) + /// + Bmp, + + /// + /// GIF format (Windows only) + /// + Gif, + + /// + /// TIFF format (Windows only) + /// + Tiff + } +} diff --git a/ZXing.Net.MAUI/Net/BarcodeImageExtensions.net.cs b/ZXing.Net.MAUI/Net/BarcodeImageExtensions.net.cs new file mode 100644 index 0000000..41b1036 --- /dev/null +++ b/ZXing.Net.MAUI/Net/BarcodeImageExtensions.net.cs @@ -0,0 +1,30 @@ +using System; +using System.IO; +using System.Threading.Tasks; + +#nullable enable + +namespace ZXing.Net.Maui +{ + /// + /// Extension methods for saving barcode images (fallback for non-supported platforms) + /// + public static class BarcodeImageExtensions + { + /// + /// Saves a barcode image to a stream (not implemented for this platform) + /// + public static Task SaveAsync(this NativePlatformImage? image, Stream stream, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + throw new PlatformNotSupportedException("Saving barcode images is not supported on this platform. Use Android, iOS, MacCatalyst, or Windows."); + } + + /// + /// Saves a barcode image to a file (not implemented for this platform) + /// + public static Task SaveAsync(this NativePlatformImage? image, string filePath, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + throw new PlatformNotSupportedException("Saving barcode images is not supported on this platform. Use Android, iOS, MacCatalyst, or Windows."); + } + } +} diff --git a/ZXing.Net.MAUI/Platforms/Android/BarcodeImageExtensions.android.cs b/ZXing.Net.MAUI/Platforms/Android/BarcodeImageExtensions.android.cs new file mode 100644 index 0000000..b5f0675 --- /dev/null +++ b/ZXing.Net.MAUI/Platforms/Android/BarcodeImageExtensions.android.cs @@ -0,0 +1,67 @@ +using Android.Graphics; +using System; +using System.IO; +using System.Threading.Tasks; + +#nullable enable + +namespace ZXing.Net.Maui +{ + /// + /// Extension methods for saving barcode images on Android + /// + public static class BarcodeImageExtensions + { + /// + /// Saves a barcode bitmap to a stream in PNG format + /// + /// The bitmap to save + /// The stream to write to + /// The image format (default: PNG) + /// The quality (0-100, default: 100) + public static async Task SaveAsync(this Bitmap? bitmap, Stream stream, BarcodeImageFormat format = BarcodeImageFormat.Png, int quality = 100) + { + if (bitmap == null) + throw new ArgumentNullException(nameof(bitmap)); + + if (stream == null) + throw new ArgumentNullException(nameof(stream)); + + var androidFormat = format switch + { + BarcodeImageFormat.Png => Bitmap.CompressFormat.Png!, + BarcodeImageFormat.Jpeg => Bitmap.CompressFormat.Jpeg!, + BarcodeImageFormat.Webp => Bitmap.CompressFormat.Webp!, + _ => Bitmap.CompressFormat.Png! + }; + + await Task.Run(() => bitmap.Compress(androidFormat, quality, stream)); + } + + /// + /// Saves a barcode bitmap to a file + /// + /// The bitmap to save + /// The file path to write to + /// The image format (default: PNG) + /// The quality (0-100, default: 100) + public static async Task SaveAsync(this Bitmap? bitmap, string filePath, BarcodeImageFormat format = BarcodeImageFormat.Png, int quality = 100) + { + if (bitmap == null) + throw new ArgumentNullException(nameof(bitmap)); + + if (string.IsNullOrEmpty(filePath)) + throw new ArgumentNullException(nameof(filePath)); + + // Create directory if it doesn't exist + var directory = Path.GetDirectoryName(filePath); + if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory)) + { + Directory.CreateDirectory(directory); + } + + using var stream = File.Create(filePath); + await bitmap.SaveAsync(stream, format, quality); + } + } +} diff --git a/ZXing.Net.MAUI/Platforms/Windows/BarcodeImageExtensions.windows.cs b/ZXing.Net.MAUI/Platforms/Windows/BarcodeImageExtensions.windows.cs new file mode 100644 index 0000000..c1a9250 --- /dev/null +++ b/ZXing.Net.MAUI/Platforms/Windows/BarcodeImageExtensions.windows.cs @@ -0,0 +1,88 @@ +using System; +using System.IO; +using System.Runtime.InteropServices.WindowsRuntime; +using System.Threading.Tasks; +using Microsoft.UI.Xaml.Media.Imaging; +using Windows.Graphics.Imaging; +using Windows.Storage.Streams; + +#nullable enable + +namespace ZXing.Net.Maui +{ + /// + /// Extension methods for saving barcode images on Windows + /// + public static class BarcodeImageExtensions + { + /// + /// Saves a barcode WriteableBitmap to a stream + /// + /// The bitmap to save + /// The stream to write to + /// The image format (default: PNG) + /// The quality (0-1, default: 1.0) + public static async Task SaveAsync(this WriteableBitmap? bitmap, Stream stream, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + if (bitmap == null) + throw new ArgumentNullException(nameof(bitmap)); + + if (stream == null) + throw new ArgumentNullException(nameof(stream)); + + var encoderId = format switch + { + BarcodeImageFormat.Png => BitmapEncoder.PngEncoderId, + BarcodeImageFormat.Jpeg => BitmapEncoder.JpegEncoderId, + BarcodeImageFormat.Bmp => BitmapEncoder.BmpEncoderId, + BarcodeImageFormat.Gif => BitmapEncoder.GifEncoderId, + BarcodeImageFormat.Tiff => BitmapEncoder.TiffEncoderId, + _ => BitmapEncoder.PngEncoderId + }; + + using var memoryStream = new InMemoryRandomAccessStream(); + var encoder = await BitmapEncoder.CreateAsync(encoderId, memoryStream); + + var pixelBuffer = bitmap.PixelBuffer.ToArray(); + encoder.SetPixelData( + BitmapPixelFormat.Bgra8, + BitmapAlphaMode.Premultiplied, + (uint)bitmap.PixelWidth, + (uint)bitmap.PixelHeight, + 96, // DPI X + 96, // DPI Y + pixelBuffer); + + await encoder.FlushAsync(); + + memoryStream.Seek(0); + await memoryStream.AsStreamForRead().CopyToAsync(stream); + } + + /// + /// Saves a barcode WriteableBitmap to a file + /// + /// The bitmap to save + /// The file path to write to + /// The image format (default: PNG) + /// The quality (0-1, default: 1.0) + public static async Task SaveAsync(this WriteableBitmap? bitmap, string filePath, BarcodeImageFormat format = BarcodeImageFormat.Png, double quality = 1.0) + { + if (bitmap == null) + throw new ArgumentNullException(nameof(bitmap)); + + if (string.IsNullOrEmpty(filePath)) + throw new ArgumentNullException(nameof(filePath)); + + // Create directory if it doesn't exist + var directory = Path.GetDirectoryName(filePath); + if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory)) + { + Directory.CreateDirectory(directory); + } + + using var stream = File.Create(filePath); + await bitmap.SaveAsync(stream, format, quality); + } + } +} From fec58d55bdd33e1099b255692a0e53d087f4c458 Mon Sep 17 00:00:00 2001 From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com> Date: Mon, 20 Oct 2025 13:27:08 +0000 Subject: [PATCH 3/6] Add GenerateBarcodeAsync method to BarcodeGeneratorView Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com> --- README.md | 29 +++++++++++++++++++ .../Controls/BarcodeGeneratorView.cs | 21 ++++++++++++++ 2 files changed, 50 insertions(+) diff --git a/README.md b/README.md index 1a5c982..cae2202 100644 --- a/README.md +++ b/README.md @@ -292,5 +292,34 @@ public async Task GenerateAndSaveBarcodeAsync() } ``` +### Saving from BarcodeGeneratorView + +You can also generate and save a barcode image directly from a `BarcodeGeneratorView` control: + +```csharp +// In your XAML + + +