可以使用ZXing创建qr码吗?没有安静地带的网络?

Question

(如何)使用ZXing创建qr码。没有安静地带的网络?

这是我当前的代码:

BarcodeWriter barcodeWriter = new BarcodeWriter();
barcodeWriter.Format = BarcodeFormat.QR_CODE;
barcodeWriter.Renderer = new BitmapRenderer();
EncodingOptions encodingOptions = new EncodingOptions();
encodingOptions.Width = 500;
encodingOptions.Height = 500;
encodingOptions.Margin = 0;
encodingOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
barcodeWriter.Options = encodingOptions;
bitmap = barcodeWriter.Write(compressedText);

谢谢!

Answer 1

ZXing。Net不支持带有抗锯齿的图像缩放。这意味着它只能通过整数值来调整大小。在这种情况下，你应该创建尽可能小的图像，并使用图像处理库或框架中的Bitmap和Graphics类来调整结果图像的大小。

var barcodeWriter = new BarcodeWriter
{
Format = BarcodeFormat.QR_CODE
};
// set width and height to 1 to get the smallest possible representation without a quiet zone around the qr code
var encodingOptions = new EncodingOptions
{
Width = 1,
Height = 1,
Margin = 0
};
encodingOptions.Hints.Add(EncodeHintType.ERROR_CORRECTION,    ErrorCorrectionLevel.L);
barcodeWriter.Options = encodingOptions;
var bitmap = barcodeWriter.Write(compressedText);
// scale the image to the desired size
var scaledBitmap = ScaleImage(bitmap, 500, 500);
private static Bitmap ScaleImage(Bitmap bmp, int maxWidth, int maxHeight)
{
var ratioX = (double)maxWidth / bmp.Width;
var ratioY = (double)maxHeight / bmp.Height;
var ratio = Math.Min(ratioX, ratioY);
var newWidth = (int)(bmp.Width * ratio);
var newHeight = (int)(bmp.Height * ratio);
var newImage = new Bitmap(newWidth, newHeight, PixelFormat.Format24bppRgb);
using (var graphics = Graphics.FromImage(newImage))
{
graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.DrawImage(bmp, 0, 0, newWidth, newHeight);
}
return newImage;
}