UPC A - It is not generating correctly

[drma-tech]

how it should be generated

how it is being generated

[aoeuidh]

There are a number of renderers you can use. Which renderer are you using, and how are you initializing it? I've had better results with the AlternateBitmapRenderer.

[drma-tech]

I tried this, but it didn't make any difference.
I found this in a very old post, but I don't know what it means.

Only the C# port of zxing (https://github.com/micjahn/ZXing.Net) generates a footer. The original java version doesn't. But the C# implementation is very simple. It doesn't divide the content into different parts.

zxing/zxing#1298

[HeinziAT]

@drma-tech: I cannot reproduce your issue, it works for me with AlternateBitmapRenderer. Minimal example:

        var writer = new BarcodeWriter()
        {
            Format = BarcodeFormat.UPC_A,
            Renderer = new AlternateBitmapRenderer(),
            Options =
            {
                Width = 300,
                Height = 150
            }
        };
        using var bitmap = writer.Write("011245365786");
        bitmap.Save(@"C:\...\upc_a.png");

The only issue I see is that the small numbers are top-aligned with the large numbers, although they should be bottom-aligned (see Chapter 5.2.5 of the GS1 General Specifications Standard, Release 25.0).