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package datamatrix
import (
"github.com/boombuler/barcode/utils"
)
type setValFunc func(byte)
type codeLayout struct {
matrix *utils.BitList
occupy *utils.BitList
size *dmCodeSize
}
func newCodeLayout(size *dmCodeSize) *codeLayout {
result := new(codeLayout)
result.matrix = utils.NewBitList(size.MatrixColumns() * size.MatrixRows())
result.occupy = utils.NewBitList(size.MatrixColumns() * size.MatrixRows())
result.size = size
return result
}
func (l *codeLayout) Occupied(row, col int) bool {
return l.occupy.GetBit(col + row*l.size.MatrixColumns())
}
func (l *codeLayout) Set(row, col int, value, bitNum byte, occupy bool) {
val := ((value >> (7 - bitNum)) & 1) == 1
if row < 0 {
row += l.size.MatrixRows()
col += 4 - ((l.size.MatrixRows() + 4) % 8)
}
if col < 0 {
col += l.size.MatrixColumns()
row += 4 - ((l.size.MatrixColumns() + 4) % 8)
}
l.matrix.SetBit(col+row*l.size.MatrixColumns(), val)
if occupy {
l.occupy.SetBit(col+row*l.size.MatrixColumns(), true)
}
}
func (l *codeLayout) SetSimple(row, col int, value byte) {
l.Set(row-2, col-2, value, 0, true)
l.Set(row-2, col-1, value, 1, true)
l.Set(row-1, col-2, value, 2, true)
l.Set(row-1, col-1, value, 3, true)
l.Set(row-1, col-0, value, 4, true)
l.Set(row-0, col-2, value, 5, true)
l.Set(row-0, col-1, value, 6, true)
l.Set(row-0, col-0, value, 7, true)
}
func (l *codeLayout) Corner1(value byte) {
l.Set(l.size.MatrixRows()-1, 0, value, 0, true)
l.Set(l.size.MatrixRows()-1, 1, value, 1, true)
l.Set(l.size.MatrixRows()-1, 2, value, 2, true)
l.Set(0, l.size.MatrixColumns()-2, value, 3, true)
l.Set(0, l.size.MatrixColumns()-1, value, 4, true)
l.Set(1, l.size.MatrixColumns()-1, value, 5, true)
l.Set(2, l.size.MatrixColumns()-1, value, 6, true)
l.Set(3, l.size.MatrixColumns()-1, value, 7, true)
}
func (l *codeLayout) Corner2(value byte) {
l.Set(l.size.MatrixRows()-3, 0, value, 0, true)
l.Set(l.size.MatrixRows()-2, 0, value, 1, true)
l.Set(l.size.MatrixRows()-1, 0, value, 2, true)
l.Set(0, l.size.MatrixColumns()-4, value, 3, true)
l.Set(0, l.size.MatrixColumns()-3, value, 4, true)
l.Set(0, l.size.MatrixColumns()-2, value, 5, true)
l.Set(0, l.size.MatrixColumns()-1, value, 6, true)
l.Set(1, l.size.MatrixColumns()-1, value, 7, true)
}
func (l *codeLayout) Corner3(value byte) {
l.Set(l.size.MatrixRows()-3, 0, value, 0, true)
l.Set(l.size.MatrixRows()-2, 0, value, 1, true)
l.Set(l.size.MatrixRows()-1, 0, value, 2, true)
l.Set(0, l.size.MatrixColumns()-2, value, 3, true)
l.Set(0, l.size.MatrixColumns()-1, value, 4, true)
l.Set(1, l.size.MatrixColumns()-1, value, 5, true)
l.Set(2, l.size.MatrixColumns()-1, value, 6, true)
l.Set(3, l.size.MatrixColumns()-1, value, 7, true)
}
func (l *codeLayout) Corner4(value byte) {
l.Set(l.size.MatrixRows()-1, 0, value, 0, true)
l.Set(l.size.MatrixRows()-1, l.size.MatrixColumns()-1, value, 1, true)
l.Set(0, l.size.MatrixColumns()-3, value, 2, true)
l.Set(0, l.size.MatrixColumns()-2, value, 3, true)
l.Set(0, l.size.MatrixColumns()-1, value, 4, true)
l.Set(1, l.size.MatrixColumns()-3, value, 5, true)
l.Set(1, l.size.MatrixColumns()-2, value, 6, true)
l.Set(1, l.size.MatrixColumns()-1, value, 7, true)
}
func (l *codeLayout) IterateSetter() <-chan setValFunc {
result := make(chan setValFunc)
go func() {
row := 4
col := 0
for (row < l.size.MatrixRows()) || (col < l.size.MatrixColumns()) {
if (row == l.size.MatrixRows()) && (col == 0) {
result <- l.Corner1
}
if (row == l.size.MatrixRows()-2) && (col == 0) && (l.size.MatrixColumns()%4 != 0) {
result <- l.Corner2
}
if (row == l.size.MatrixRows()-2) && (col == 0) && (l.size.MatrixColumns()%8 == 4) {
result <- l.Corner3
}
if (row == l.size.MatrixRows()+4) && (col == 2) && (l.size.MatrixColumns()%8 == 0) {
result <- l.Corner4
}
for true {
if (row < l.size.MatrixRows()) && (col >= 0) && !l.Occupied(row, col) {
r := row
c := col
result <- func(b byte) {
l.SetSimple(r, c, b)
}
}
row -= 2
col += 2
if (row < 0) || (col >= l.size.MatrixColumns()) {
break
}
}
row += 1
col += 3
for true {
if (row >= 0) && (col < l.size.MatrixColumns()) && !l.Occupied(row, col) {
r := row
c := col
result <- func(b byte) {
l.SetSimple(r, c, b)
}
}
row += 2
col -= 2
if (row >= l.size.MatrixRows()) || (col < 0) {
break
}
}
row += 3
col += 1
}
close(result)
}()
return result
}
func (l *codeLayout) Merge() *datamatrixCode {
result := newDataMatrixCode(l.size)
//dotted horizontal lines
for r := 0; r < l.size.Rows; r += (l.size.RegionRows() + 2) {
for c := 0; c < l.size.Columns; c += 2 {
result.set(c, r, true)
}
}
//solid horizontal line
for r := l.size.RegionRows() + 1; r < l.size.Rows; r += (l.size.RegionRows() + 2) {
for c := 0; c < l.size.Columns; c++ {
result.set(c, r, true)
}
}
//dotted vertical lines
for c := l.size.RegionColumns() + 1; c < l.size.Columns; c += (l.size.RegionColumns() + 2) {
for r := 1; r < l.size.Rows; r += 2 {
result.set(c, r, true)
}
}
//solid vertical line
for c := 0; c < l.size.Columns; c += (l.size.RegionColumns() + 2) {
for r := 0; r < l.size.Rows; r++ {
result.set(c, r, true)
}
}
count := 0
for hRegion := 0; hRegion < l.size.RegionCountHorizontal; hRegion++ {
for vRegion := 0; vRegion < l.size.RegionCountVertical; vRegion++ {
for x := 0; x < l.size.RegionColumns(); x++ {
colMatrix := (l.size.RegionColumns() * hRegion) + x
colResult := ((2 + l.size.RegionColumns()) * hRegion) + x + 1
for y := 0; y < l.size.RegionRows(); y++ {
rowMatrix := (l.size.RegionRows() * vRegion) + y
rowResult := ((2 + l.size.RegionRows()) * vRegion) + y + 1
val := l.matrix.GetBit(colMatrix + rowMatrix*l.size.MatrixColumns())
if val {
count++
}
result.set(colResult, rowResult, val)
}
}
}
}
return result
}
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