Toolkit.UI.Controls.Avalonia

2024-04-13 11:41:33 +01:00
parent 62a7e94e19
commit 862e7b2e34
97 changed files with 8558 additions and 0 deletions
@@ -0,0 +1,84 @@
+using Gma.QrCodeNet.Encoding.ReedSolomon;
+using System;
+using System.Collections.Generic;
+
+namespace Gma.QrCodeNet.Encoding.ErrorCorrection;
+
+internal static class ECGenerator
+{
+	internal static BitList FillECCodewords(BitList dataCodewords, VersionDetail vd)
+	{
+		List<byte> dataCodewordsByte = dataCodewords.List;
+
+		int ecBlockGroup1 = vd.ECBlockGroup1;
+		int numDataBytesGroup1 = vd.NumDataBytesGroup1;
+		int numDataBytesGroup2 = vd.NumDataBytesGroup2;
+
+		int ecBytesPerBlock = vd.NumECBytesPerBlock;
+
+		int dataBytesOffset = 0;
+		byte[][] dByteJArray = new byte[vd.NumECBlocks][];
+		byte[][] ecByteJArray = new byte[vd.NumECBlocks][];
+
+		GaloisField256 gf256 = GaloisField256.QRCodeGaloisField;
+		GeneratorPolynomial generator = new(gf256);
+
+		for (int blockId = 0; blockId < vd.NumECBlocks; blockId++)
+		{
+			if (blockId < ecBlockGroup1)
+			{
+				dByteJArray[blockId] = new byte[numDataBytesGroup1];
+				for (int index = 0; index < numDataBytesGroup1; index++)
+				{
+					dByteJArray[blockId][index] = dataCodewordsByte[dataBytesOffset + index];
+				}
+				dataBytesOffset += numDataBytesGroup1;
+			}
+			else
+			{
+				dByteJArray[blockId] = new byte[numDataBytesGroup2];
+				for (int index = 0; index < numDataBytesGroup2; index++)
+				{
+					dByteJArray[blockId][index] = dataCodewordsByte[dataBytesOffset + index];
+				}
+				dataBytesOffset += numDataBytesGroup2;
+			}
+
+			ecByteJArray[blockId] = ReedSolomonEncoder.Encode(dByteJArray[blockId], ecBytesPerBlock, generator);
+		}
+		if (vd.NumDataBytes != dataBytesOffset)
+		{
+			throw new ArgumentException("Data bytes do not match offset");
+		}
+
+		BitList codewords = new();
+
+		int maxDataLength = ecBlockGroup1 == vd.NumECBlocks ? numDataBytesGroup1 : numDataBytesGroup2;
+
+		for (int dataId = 0; dataId < maxDataLength; dataId++)
+		{
+			for (int blockId = 0; blockId < vd.NumECBlocks; blockId++)
+			{
+				if (!(dataId == numDataBytesGroup1 && blockId < ecBlockGroup1))
+				{
+					codewords.Add(dByteJArray[blockId][dataId], 8);
+				}
+			}
+		}
+
+		for (int ecId = 0; ecId < ecBytesPerBlock; ecId++)
+		{
+			for (int blockId = 0; blockId < vd.NumECBlocks; blockId++)
+			{
+				codewords.Add(ecByteJArray[blockId][ecId], 8);
+			}
+		}
+
+		if (vd.NumTotalBytes != codewords.Count >> 3)
+		{
+			throw new ArgumentException($"Total bytes: {vd.NumTotalBytes}. Actual bits: {codewords.Count}");
+		}
+
+		return codewords;
+	}
+}