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 +1,72 @@
+using System;
+
+namespace Gma.QrCodeNet.Encoding.EncodingRegion;
+
+/// <remarks>ISO/IEC 18004:2000 Chapter 8.7.3 Page 46</remarks>
+internal static class Codeword
+{
+	internal static void TryEmbedCodewords(this TriStateMatrix tsMatrix, BitList codewords)
+	{
+		int sWidth = tsMatrix.Width;
+		int codewordsSize = codewords.Count;
+
+		int bitIndex = 0;
+		int directionUp = -1;
+
+		int x = sWidth - 1;
+		int y = sWidth - 1;
+
+		while (x > 0)
+		{
+			// Skip vertical timing pattern
+			if (x == 6)
+			{
+				x -= 1;
+			}
+
+			while (y >= 0 && y < sWidth)
+			{
+				for (int xOffset = 0; xOffset < 2; xOffset++)
+				{
+					int xPos = x - xOffset;
+					if (tsMatrix.MStatus(xPos, y) == MatrixStatus.None)
+					{
+						bool bit;
+						if (bitIndex < codewordsSize)
+						{
+							bit = codewords[bitIndex];
+							bitIndex++;
+						}
+						else
+						{
+							bit = false;
+						}
+
+						tsMatrix[xPos, y, MatrixStatus.Data] = bit;
+					}
+				}
+
+				y = NextY(y, directionUp);
+			}
+
+			directionUp = ChangeDirection(directionUp);
+			y = NextY(y, directionUp);
+			x -= 2;
+		}
+
+		if (bitIndex != codewordsSize)
+		{
+			throw new Exception($"Not all bits from {nameof(codewords)} consumed by matrix: {bitIndex} / {codewordsSize}.");
+		}
+	}
+
+	internal static int NextY(int y, int directionUp)
+	{
+		return y + directionUp;
+	}
+
+	internal static int ChangeDirection(int directionUp)
+	{
+		return -directionUp;
+	}
+}