ClassLibraryWeiBao/QR二维码/Positioning/Stencils/AlignmentPattern.cs

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using System;
using System.Linq;
using System.Collections.Generic;

namespace Gma.QrCodeNet.Encoding.Positioning.Stencils
{
    internal class AlignmentPattern : PatternStencilBase
    {
        private static readonly bool[,] s_AlignmentPattern = new[,]
                                                                          {
                                                                              { x, x, x, x, x }, 
                                                                              { x, o, o, o, x }, 
                                                                              { x, o, x, o, x }, 
                                                                              { x, o, o, o, x }, 
                                                                              { x, x, x, x, x }
                                                                          };

        public AlignmentPattern(int version) 
            : base(version)
        {
        }

        public override bool[,] Stencil
        {
            get { return s_AlignmentPattern; }
        }

        public override void ApplyTo(TriStateMatrix matrix)
        {
            foreach (MatrixPoint coordinatePair in GetNonColidingCoordinatePairs(matrix))
            {
                this.CopyTo(matrix, coordinatePair, MatrixStatus.NoMask);
            }
        }

        public IEnumerable<MatrixPoint> GetNonColidingCoordinatePairs(TriStateMatrix matrix)
        {
            return
                GetAllCoordinatePairs()
                    .Where(point => matrix.MStatus(point.Offset(2, 2)) == MatrixStatus.None);
        }

        private IEnumerable<MatrixPoint> GetAllCoordinatePairs()
        {
            IEnumerable<byte> coordinates = GetPatternCoordinatesByVersion(Version);
            foreach (byte centerX in coordinates)
            {
                foreach (byte centerY in coordinates)
                {
                    MatrixPoint location = new MatrixPoint(centerX - 2, centerY - 2);
                    yield return location;
                }
            }
        }

        private static IEnumerable<byte> GetPatternCoordinatesByVersion(int version)
        {
            return s_AlignmentPatternCoordinatesByVersion[version];
        }