git.sr.ht/~pingoo/stdx@v0.0.0-20240218134121-094174641f6e/barcode/datamatrix/codesize.go (about)

     1  package datamatrix
     2  
     3  type dmCodeSize struct {
     4  	Rows                  int
     5  	Columns               int
     6  	RegionCountHorizontal int
     7  	RegionCountVertical   int
     8  	ECCCount              int
     9  	BlockCount            int
    10  }
    11  
    12  func (s *dmCodeSize) RegionRows() int {
    13  	return (s.Rows - (s.RegionCountVertical * 2)) / s.RegionCountVertical
    14  }
    15  
    16  func (s *dmCodeSize) RegionColumns() int {
    17  	return (s.Columns - (s.RegionCountHorizontal * 2)) / s.RegionCountHorizontal
    18  }
    19  
    20  func (s *dmCodeSize) MatrixRows() int {
    21  	return s.RegionRows() * s.RegionCountVertical
    22  }
    23  
    24  func (s *dmCodeSize) MatrixColumns() int {
    25  	return s.RegionColumns() * s.RegionCountHorizontal
    26  }
    27  
    28  func (s *dmCodeSize) DataCodewords() int {
    29  	return ((s.MatrixColumns() * s.MatrixRows()) / 8) - s.ECCCount
    30  }
    31  
    32  func (s *dmCodeSize) DataCodewordsForBlock(idx int) int {
    33  	if s.Rows == 144 && s.Columns == 144 {
    34  		// Special Case...
    35  		if idx < 8 {
    36  			return 156
    37  		} else {
    38  			return 155
    39  		}
    40  	}
    41  	return s.DataCodewords() / s.BlockCount
    42  }
    43  
    44  func (s *dmCodeSize) ErrorCorrectionCodewordsPerBlock() int {
    45  	return s.ECCCount / s.BlockCount
    46  }
    47  
    48  var codeSizes []*dmCodeSize = []*dmCodeSize{
    49  	&dmCodeSize{10, 10, 1, 1, 5, 1},
    50  	&dmCodeSize{12, 12, 1, 1, 7, 1},
    51  	&dmCodeSize{14, 14, 1, 1, 10, 1},
    52  	&dmCodeSize{16, 16, 1, 1, 12, 1},
    53  	&dmCodeSize{18, 18, 1, 1, 14, 1},
    54  	&dmCodeSize{20, 20, 1, 1, 18, 1},
    55  	&dmCodeSize{22, 22, 1, 1, 20, 1},
    56  	&dmCodeSize{24, 24, 1, 1, 24, 1},
    57  	&dmCodeSize{26, 26, 1, 1, 28, 1},
    58  	&dmCodeSize{32, 32, 2, 2, 36, 1},
    59  	&dmCodeSize{36, 36, 2, 2, 42, 1},
    60  	&dmCodeSize{40, 40, 2, 2, 48, 1},
    61  	&dmCodeSize{44, 44, 2, 2, 56, 1},
    62  	&dmCodeSize{48, 48, 2, 2, 68, 1},
    63  	&dmCodeSize{52, 52, 2, 2, 84, 2},
    64  	&dmCodeSize{64, 64, 4, 4, 112, 2},
    65  	&dmCodeSize{72, 72, 4, 4, 144, 4},
    66  	&dmCodeSize{80, 80, 4, 4, 192, 4},
    67  	&dmCodeSize{88, 88, 4, 4, 224, 4},
    68  	&dmCodeSize{96, 96, 4, 4, 272, 4},
    69  	&dmCodeSize{104, 104, 4, 4, 336, 6},
    70  	&dmCodeSize{120, 120, 6, 6, 408, 6},
    71  	&dmCodeSize{132, 132, 6, 6, 496, 8},
    72  	&dmCodeSize{144, 144, 6, 6, 620, 10},
    73  }