unit Barcode;

{
Barcode Component
Version 1.5 (23 Apr 1999)
Copyright 1998-99 Andreas Schmidt and friends

Freeware

for use with Delphi 2/3/4


this component is for private use only !
i'am not responsible for wrong barcodes

bug-reports, enhancements:
mailto:shmia@bizerba.de or a_j_schmidt@rocketmail.com

get latest version from
http://members.tripod.de/AJSchmidt/index.html


thanx to Nikolay Simeonov, Wolfgang Koranda, Norbert Waas,
Richard Hugues and Olivier Guilbaud.



Diese Komponente darf nur in privaten Projekten verwendet werden.
Die Weitergabe von veränderte Dateien ist nicht zulässig.
Für die Korrektheit der erzeugten Barcodes kann keine Garantie
übernommen werden.
Anregungen, Bug-Reports, Danksagungen an:
mailto:shmia@bizerba.de



History:
----------------------------------------------------------------------
Version 1.0:
- initial release
Version 1.1:
- more comments
- changed function Code_93Extended (now correct ?)
Version 1.2:
- Bugs (found by Nikolay Simeonov) removed
Version 1.3:
- EAN8/EAN13 added by Wolfgang Koranda (wkoranda@csi.com)
Version 1.4:
- Bug (found by Norbert Waas) removed
  Component must save the Canvas-properties Font,Pen and Brush
Version 1.5:
- Bug (found by Richard Hugues) removed
  Last line of barcode was 1 Pixel too wide
Version 1.6:
- new read-only property 'Width'



Todo (missing features)
-----------------------
- Code128C not implemented (could someone else
  do this for me ?)
- Wrapper Class for Quick Reports



}



interface

{$I lr_vers.inc}

uses
   Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
        TBarcodeType = (bcCode_2_5_interleaved,
                bcCode_2_5_industrial,
                bcCode_2_5_matrix,
                bcCode39,
                bcCode39Extended,
                bcCode128A,
                bcCode128B,
                bcCode128C,
                bcCode93,
                bcCode93Extended,
                bcCodeMSI,
                bcCodePostNet,
                bcCodeCodabar,
                bcCodeEAN8,
                bcCodeEAN13
                                );


        TBarLineType = (white, black, black_half);  // for internal use only
        // black_half means a black line with 2/5 height (used for PostNet)


        TBarcode = class(TComponent)
        private
          { Private-Deklarationen }
                FHeight : integer;
                FText  : string;
                FTop    : integer;
                FLeft   : integer;
                FModul  : integer;
                FRatio  : double;
                FTyp    : TBarcodeType;
                FCheckSum:boolean;
                FShowText:boolean;
                FAngle  : double;

                modules:array[0..3] of shortint;


                procedure OneBarProps(code:char; var aWidth:integer; var lt:TBarLineType);

                procedure DoLines(data:string; Canvas:TCanvas);

                function Code_2_5_interleaved:string;
                function Code_2_5_industrial:string;
                function Code_2_5_matrix:string;
                function Code_39:string;
                function Code_39Extended:string;
                function Code_128:string;
                function Code_93:string;
                function Code_93Extended:string;
                function Code_MSI:string;
                function Code_PostNet:string;
                function Code_Codabar:string;
                function Code_EAN8:string;
                function Code_EAN13:string;

                function GetTypText:string;
                procedure MakeModules;

                procedure SetModul(v:integer);

                function GetWidth : integer;

        protected
          { Protected-Deklarationen }
                function MakeData : string;

        public
          { Public-Deklarationen }
                constructor Create(aOwner:TComponent); override;
                procedure DrawBarcode(Canvas:TCanvas);
                procedure DrawText(Canvas:TCanvas);
        published
          { Published-Deklarationen }
                // Height of Barcode (Pixel)
                property Height : integer read FHeight write FHeight;
                property Text   : string  read FText   write FText;
                property Top    : integer read FTop    write FTop;
                property Left   : integer read FLeft   write FLeft;
                // Width of the smallest line in a Barcode
                property Modul  : integer read FModul  write SetModul;
                property Ratio  : double  read FRatio  write FRatio;
                property Typ    : TBarcodeType read FTyp write FTyp default bcCode_2_5_interleaved;
                // build CheckSum ?
                property Checksum:boolean read FCheckSum write FCheckSum default FALSE;
                // 0 - 360 degree
                property Angle  :double read FAngle write FAngle;

                property ShowText:boolean read FShowText write FShowText default FALSE;
                property Width : integer read GetWidth;
        end;

// procedure Register; // Removed by TZ

implementation


{
        converts a string from '321' to the internal representation '715'
        i need this function because some pattern tables have a different
        format :

        '00111'
        converts to '05161'

}
function Convert(s:string):string;
var
        i, v : integer;
        t : string;
begin
        t := '';
        for i:=1 to Length(s) do
        begin
                v := ord(s[i]) - 1;

                if odd(i) then
                        Inc(v, 5);
                t := t + Chr(v);
        end;
        Convert := t;
end;

(*
 * Berechne die Quersumme aus einer Zahl x
 * z.B.: Quersumme von 1234 ist 10
 *)
function quersumme(x:integer):integer;
var
        sum:integer;
begin
        sum := 0;

        while x > 0 do
        begin
                sum := sum + (x mod 10);
                x := x div 10;
        end;
        result := sum;
end;


{
        Rotate a Point by Angle 'alpha'
}
function Rotate2D(p:TPoint; alpha:double): TPoint;
var
        sinus, cosinus : Extended;
begin
        sinus   := sin(alpha);
        cosinus := cos(alpha);
        result.x := Round(p.x*cosinus + p.y*sinus);
        result.y := Round(-p.x*sinus + p.y*cosinus);
end;

{
        Move Point a by Vector b
}
function Translate2D(a, b:TPoint): TPoint;
begin
        result.x := a.x + b.x;
        result.y := a.y + b.y;
end;





constructor TBarcode.Create(aOwner:TComponent);
begin
  inherited Create(aOwner);

  FAngle := 0.0;
  FRatio := 2.0;
  FModul := 1;
  FTyp   := bcCodeEAN13;
  FCheckSum := FALSE;
  FShowText := FALSE;
end;


function TBarcode.GetTypText:string;

const bcNames:array[bcCode_2_5_interleaved..bcCodeEAN13] of string =
        (
                ('2_5_interleaved'),
                ('2_5_industrial'),
                ('2_5_matrix'),
                ('Code39'),
                ('Code39 Extended'),
                ('Code128A'),
                ('Code128B'),
                ('Code128C'),
                ('Code93'),
                ('Code93 Extended'),
                ('MSI'),
                ('PostNet'),
                ('Codebar'),
                ('EAN8'),
                ('EAN13')
        );

begin
        result := bcNames[FTyp];
end;



// set Modul Width
procedure TBarcode.SetModul(v:integer);
begin
        if (v >= 1) and (v < 50) then
                FModul := v;
end;


{
calculate the width and the linetype of a sigle bar


  Code   Line-Color      Width               Height
------------------------------------------------------------------
        '0'   white           100%                full
        '1'   white           100%*Ratio          full
        '2'   white           150%*Ratio          full
        '3'   white           200%*Ratio          full
        '5'   black           100%                full
        '6'   black           100%*Ratio          full
        '7'   black           150%*Ratio          full
        '8'   black           200%*Ratio          full
        'A'   black           100%                2/5  (used for PostNet)
        'B'   black           100%*Ratio          2/5  (used for PostNet)
        'C'   black           150%*Ratio          2/5  (used for PostNet)
        'D'   black           200%*Ratio          2/5  (used for PostNet)
}
procedure TBarcode.OneBarProps(code:char; var aWidth:integer; var lt:TBarLineType);
begin
        case code of
                '0': begin aWidth := modules[0]; lt := white; end;
                '1': begin aWidth := modules[1]; lt := white; end;
                '2': begin aWidth := modules[2]; lt := white; end;
                '3': begin aWidth := modules[3]; lt := white; end;


                '5': begin aWidth := modules[0]; lt := black; end;
                '6': begin aWidth := modules[1]; lt := black; end;
                '7': begin aWidth := modules[2]; lt := black; end;
                '8': begin aWidth := modules[3]; lt := black; end;

                'A': begin aWidth := modules[0]; lt := black_half; end;
                'B': begin aWidth := modules[1]; lt := black_half; end;
                'C': begin aWidth := modules[2]; lt := black_half; end;
                'D': begin aWidth := modules[3]; lt := black_half; end;
        else
                begin
                // something went wrong  :-(
                // mistyped pattern table
                raise Exception.CreateFmt('%s: internal Error', [self.ClassName]);
                end;
        end;
end;


function TBarcode.MakeData : string;
begin
        // calculate the with of the different lines (modules)
        MakeModules;

        // get the pattern of the barcode
        case Typ of
                bcCode_2_5_interleaved: Result := Code_2_5_interleaved;
                bcCode_2_5_industrial:  Result := Code_2_5_industrial;
                bcCode_2_5_matrix:      Result := Code_2_5_matrix;
                bcCode39:               Result := Code_39;
                bcCode39Extended:       Result := Code_39Extended;
                bcCode128A,
                bcCode128B,
                bcCode128C:                                     Result := Code_128;
                bcCode93:               Result := Code_93;
                bcCode93Extended:       Result := Code_93Extended;
                bcCodeMSI:              Result := Code_MSI;
                bcCodePostNet:          Result := Code_PostNet;
                bcCodeCodabar:          Result := Code_Codabar;
                bcCodeEAN8:             Result := Code_EAN8;
                bcCodeEAN13:            Result := Code_EAN13;
        else
                raise Exception.CreateFmt('%s: wrong BarcodeType', [self.ClassName]);
        end;

//Showmessage(Format('Data <%s>', [Result]));
end;



function TBarcode.GetWidth:integer;
var
        data : string;
        i : integer;
        w : integer;
        lt : TBarLineType;
begin
        Result := 0;

        // get barcode pattern
        data := MakeData;

        for i:=1 to Length(data) do  // examine the pattern string
        begin
                OneBarProps(data[i], w, lt);
                Inc(Result, w);
        end;
end;



////////////////////////////// EAN /////////////////////////////////////////

function getEAN(Nr : String) : String;
   var i,fak,sum : Integer;
       tmp   : String;
begin
     sum := 0;
     tmp := copy(nr,1,Length(Nr)-1);
     fak := Length(tmp);
          for i:=1 to length(tmp) do
                        begin
         if (fak mod 2) = 0 then
            sum := sum + (StrToInt(tmp[i])*1)
         else
            sum := sum + (StrToInt(tmp[i])*3);
         dec(fak);
                        end;
     if (sum mod 10) = 0 then
        result := tmp+'0'
     else
                  result := tmp+IntToStr(10-(sum mod 10));
end;

////////////////////////////// EAN8 /////////////////////////////////////////

// Pattern for Barcode EAN Zeichensatz A
//       L1   S1   L2   S2
const tabelle_EAN_A:array['0'..'9', 1..4] of char =
        (
        ('2', '6', '0', '5'),    // 0
        ('1', '6', '1', '5'),    // 1
        ('1', '5', '1', '6'),    // 2
        ('0', '8', '0', '5'),    // 3
        ('0', '5', '2', '6'),    // 4
        ('0', '6', '2', '5'),    // 5
        ('0', '5', '0', '8'),    // 6
        ('0', '7', '0', '6'),    // 7
        ('0', '6', '0', '7'),    // 8
        ('2', '5', '0', '6')     // 9
        );

// Pattern for Barcode EAN Zeichensatz C
//       S1   L1   S2   L2
const tabelle_EAN_C:array['0'..'9', 1..4] of char =
        (
        ('7', '1', '5', '0' ),    // 0
        ('6', '1', '6', '0' ),    // 1
        ('6', '0', '6', '1' ),    // 2
        ('5', '3', '5', '0' ),    // 3
        ('5', '0', '7', '1' ),    // 4
        ('5', '1', '7', '0' ),    // 5
        ('5', '0', '5', '3' ),    // 6
        ('5', '2', '5', '1' ),    // 7
        ('5', '1', '5', '2' ),    // 8
        ('7', '0', '5', '1' )     // 9
        );


function TBarcode.Code_EAN8:string;
var
        i, j: integer;
        tmp : String;
begin
        if FCheckSum then
           begin
           tmp := '00000000'+FText;
                          tmp := getEAN(copy(tmp,length(tmp)-6,7)+'0');
           end
        else
           tmp := Ftext;

        result := '505';   // Startcode

        for i:=1 to 4 do
            for j:= 1 to 4 do
                begin
                                         result := result + tabelle_EAN_A[tmp[i], j] ;
                end;

        result := result + '05050';   // Trennzeichen

        for i:=5 to 8 do
            for j:= 1 to 4 do
                begin
                                         result := result + tabelle_EAN_C[tmp[i], j] ;
                                         end;

        result := result + '505';   // Stopcode
end;

////////////////////////////// EAN13 ///////////////////////////////////////

// Pattern for Barcode EAN Zeichensatz B
//       L1   S1   L2   S2
const tabelle_EAN_B:array['0'..'9', 1..4] of char =
        (
        ('0', '5', '1', '7'),    // 0
        ('0', '6', '1', '6'),    // 1
        ('1', '6', '0', '6'),    // 2
        ('0', '5', '3', '5'),    // 3
        ('1', '7', '0', '5'),    // 4
        ('0', '7', '1', '5'),    // 5
        ('3', '5', '0', '5'),    // 6
        ('1', '5', '2', '5'),    // 7
        ('2', '5', '1', '5'),    // 8
        ('1', '5', '0', '7')     // 9
        );

// Zuordung der Paraitaetsfolgen für EAN13
const tabelle_ParityEAN13:array[0..9, 1..6] of char =
        (
        ('A', 'A', 'A', 'A', 'A', 'A'),    // 0
        ('A', 'A', 'B', 'A', 'B', 'B'),    // 1
        ('A', 'A', 'B', 'B', 'A', 'B'),    // 2
        ('A', 'A', 'B', 'B', 'B', 'A'),    // 3
        ('A', 'B', 'A', 'A', 'B', 'B'),    // 4
        ('A', 'B', 'B', 'A', 'A', 'B'),    // 5
        ('A', 'B', 'B', 'B', 'A', 'A'),    // 6
        ('A', 'B', 'A', 'B', 'A', 'B'),    // 7
        ('A', 'B', 'A', 'B', 'B', 'A'),    // 8
        ('A', 'B', 'B', 'A', 'B', 'A')     // 9
        );

function TBarcode.Code_EAN13:string;
var
        i, j, LK: integer;
        tmp : String;
begin
        if FCheckSum then
        begin
                tmp := '0000000000000'+FText;
                tmp := getEAN(copy(tmp,length(tmp)-11,12)+'0');
        end
        else
                tmp := Ftext;

        LK := StrToInt(tmp[1]);
        tmp := copy(tmp,2,12);

        result := '505';   // Startcode

        for i:=1 to 6 do
        begin
                case tabelle_ParityEAN13[LK,i] of
                        'A' : for j:= 1 to 4 do
                                                result := result + tabelle_EAN_A[tmp[i], j] ;
                        'B' : for j:= 1 to 4 do
                                                result := result + tabelle_EAN_B[tmp[i], j] ;
                        'C' : for j:= 1 to 4 do
                                                result := result + tabelle_EAN_C[tmp[i], j] ;
        end;
        end;

        result := result + '05050';   // Trennzeichen

        for i:=7 to 12 do
                for j:= 1 to 4 do
                begin
                        result := result + tabelle_EAN_C[tmp[i], j] ;
                end;

        result := result + '505';   // Stopcode
end;

// Pattern for Barcode 2 of 5
const tabelle_2_5:array['0'..'9', 1..5] of char =
        (
        ('0', '0', '1', '1', '0'),    // 0
        ('1', '0', '0', '0', '1'),    // 1
        ('0', '1', '0', '0', '1'),    // 2
        ('1', '1', '0', '0', '0'),    // 3
        ('0', '0', '1', '0', '1'),    // 4
        ('1', '0', '1', '0', '0'),    // 5
        ('0', '1', '1', '0', '0'),    // 6
        ('0', '0', '0', '1', '1'),    // 7
        ('1', '0', '0', '1', '0'),    // 8
        ('0', '1', '0', '1', '0')     // 9
        );

function TBarcode.Code_2_5_interleaved:string;
var
        i, j: integer;
        c : char;

begin
        result := '5050';   // Startcode

        for i:=1 to Length(FText) div 2 do
        begin
                for j:= 1 to 5 do
                begin
                        if tabelle_2_5[FText[i*2-1], j] = '1' then
                                c := '6'
                        else
                                c := '5';
                        result := result + c;
                        if tabelle_2_5[FText[i*2], j] = '1' then
                                c := '1'
                        else
                                c := '0';
                        result := result + c;
                end;
        end;

        result := result + '605';    // Stopcode
end;


function TBarcode.Code_2_5_industrial:string;
var
        i, j: integer;
begin
        result := '606050';   // Startcode

        for i:=1 to Length(FText) do
        begin
                for j:= 1 to 5 do
                begin
                if tabelle_2_5[FText[i], j] = '1' then
                        result := result + '60'
                else
                        result := result + '50';
                end;
        end;

        result := result + '605060';   // Stopcode
end;

function TBarcode.Code_2_5_matrix:string;
var
        i, j: integer;
        c :char;
begin
        result := '705050';   // Startcode

        for i:=1 to Length(FText) do
        begin
                for j:= 1 to 5 do
                begin
                        if tabelle_2_5[FText[i], j] = '1' then
                                c := '1'
                        else
                                c := '0';

                        // Falls i ungerade ist dann mache Lücke zu Strich
                        if odd(j) then
                                c := chr(ord(c)+5);
                        result := result + c;
                end;
                result := result + '0';   // Lücke zwischen den Zeichen
        end;

        result := result + '70505';   // Stopcode
end;


function TBarcode.Code_39:string;

type TCode39 =
        record
                c : char;
                data : array[0..9] of char;
                chk: shortint;
        end;

const tabelle_39: array[0..43] of TCode39 = (
        ( c:'0'; data:'505160605'; chk:0 ),
        ( c:'1'; data:'605150506'; chk:1 ),
        ( c:'2'; data:'506150506'; chk:2 ),
        ( c:'3'; data:'606150505'; chk:3 ),
        ( c:'4'; data:'505160506'; chk:4 ),
        ( c:'5'; data:'605160505'; chk:5 ),
        ( c:'6'; data:'506160505'; chk:6 ),
        ( c:'7'; data:'505150606'; chk:7 ),
        ( c:'8'; data:'605150605'; chk:8 ),
        ( c:'9'; data:'506150605'; chk:9 ),
        ( c:'A'; data:'605051506'; chk:10),
        ( c:'B'; data:'506051506'; chk:11),
        ( c:'C'; data:'606051505'; chk:12),
        ( c:'D'; data:'505061506'; chk:13),
        ( c:'E'; data:'605061505'; chk:14),
        ( c:'F'; data:'506061505'; chk:15),
        ( c:'G'; data:'505051606'; chk:16),
        ( c:'H'; data:'605051605'; chk:17),
        ( c:'I'; data:'506051600'; chk:18),
        ( c:'J'; data:'505061605'; chk:19),
        ( c:'K'; data:'605050516'; chk:20),
        ( c:'L'; data:'506050516'; chk:21),
        ( c:'M'; data:'606050515'; chk:22),
        ( c:'N'; data:'505060516'; chk:23),
        ( c:'O'; data:'605060515'; chk:24),
        ( c:'P'; data:'506060515'; chk:25),
        ( c:'Q'; data:'505050616'; chk:26),
        ( c:'R'; data:'605050615'; chk:27),
        ( c:'S'; data:'506050615'; chk:28),
        ( c:'T'; data:'505060615'; chk:29),
        ( c:'U'; data:'615050506'; chk:30),
        ( c:'V'; data:'516050506'; chk:31),
        ( c:'W'; data:'616050505'; chk:32),
        ( c:'X'; data:'515060506'; chk:33),
        ( c:'Y'; data:'615060505'; chk:34),
        ( c:'Z'; data:'516060505'; chk:35),
        ( c:'-'; data:'515050606'; chk:36),
        ( c:'.'; data:'615050605'; chk:37),
        ( c:' '; data:'516050605'; chk:38),
        ( c:'*'; data:'515060605'; chk:0 ),
        ( c:'$'; data:'515151505'; chk:39),
        ( c:'/'; data:'515150515'; chk:40),
        ( c:'+'; data:'515051515'; chk:41),
        ( c:'%'; data:'505151515'; chk:42)
        );


function FindIdx(z:char):integer;
var
        i:integer;
begin
  Result := -1;
  for i:=0 to High(tabelle_39) do
  begin
    if z = tabelle_39[i].c then
    begin
      Result := i;
      Break;
    end;
  end;
end;

var
  i, idx : integer;
  vChecksum:integer;

begin
  vChecksum := 0;
  // Startcode
  Result:=tabelle_39[FindIdx('*')].data + '0';

  for i:=1 to Length(FText) do
  begin
    idx := FindIdx(FText[i]);
    if idx < 0 then
            continue;
    result := result + tabelle_39[idx].data + '0';
    Inc(vChecksum, tabelle_39[idx].chk);
  end;

  // Calculate Checksum Data
  if FCheckSum then
  begin
    vChecksum := vChecksum mod 43;
    for i:=0 to High(tabelle_39) do
      if vChecksum = tabelle_39[i].chk then
      begin
        Result := result + tabelle_39[i].data + '0';
        exit;
      end;
  end;

  // Stopcode
  Result := result + tabelle_39[FindIdx('*')].data;
end;

function TBarcode.Code_39Extended:string;

const code39x : array[0..127] of string[2] =
        (
        ('%U'), ('$A'), ('$B'), ('$C'), ('$D'), ('$E'), ('$F'), ('$G'),
        ('$H'), ('$I'), ('$J'), ('$K'), ('$L'), ('$M'), ('$N'), ('$O'),
        ('$P'), ('$Q'), ('$R'), ('$S'), ('$T'), ('$U'), ('$V'), ('$W'),
        ('$X'), ('$Y'), ('$Z'), ('%A'), ('%B'), ('%C'), ('%D'), ('%E'),
         (' '), ('/A'), ('/B'), ('/C'), ('/D'), ('/E'), ('/F'), ('/G'),
        ('/H'), ('/I'), ('/J'), ('/K'), ('/L'), ('/M'), ('/N'), ('/O'),
        ( '0'),  ('1'),  ('2'),  ('3'),  ('4'),  ('5'),  ('6'),  ('7'),
         ('8'),  ('9'), ('/Z'), ('%F'), ('%G'), ('%H'), ('%I'), ('%J'),
        ('%V'),  ('A'),  ('B'),  ('C'),  ('D'),  ('E'),  ('F'),  ('G'),
         ('H'),  ('I'),  ('J'),  ('K'),  ('L'),  ('M'),  ('N'),  ('O'),
         ('P'),  ('Q'),  ('R'),  ('S'),  ('T'),  ('U'),  ('V'),  ('W'),
         ('X'),  ('Y'),  ('Z'), ('%K'), ('%L'), ('%M'), ('%N'), ('%O'),
        ('%W'), ('+A'), ('+B'), ('+C'), ('+D'), ('+E'), ('+F'), ('+G'),
        ('+H'), ('+I'), ('+J'), ('+K'), ('+L'), ('+M'), ('+N'), ('+O'),
        ('+P'), ('+Q'), ('+R'), ('+S'), ('+T'), ('+U'), ('+V'), ('+W'),
        ('+X'), ('+Y'), ('+Z'), ('%P'), ('%Q'), ('%R'), ('%S'), ('%T')
        );


var
        save:string;
        i : integer;
begin
        save := FText;
        FText := '';

        for i:=1 to Length(save) do
        begin
                if ord(save[i]) <= 127 then
                        FText := FText + code39x[ord(save[i])];
        end;
        result := Code_39;
        FText := save;
end;



{
Code 128
}
function TBarcode.Code_128:string;
type TCode128 =
        record
                a, b : char;
                c : string[2];
                data : string[6];
        end;

const tabelle_128: array[0..102] of TCode128 = (
        ( a:' '; b:' '; c:'00'; data:'212222'; ),
        ( a:'!'; b:'!'; c:'01'; data:'222122'; ),
        ( a:'"'; b:'"'; c:'02'; data:'222221'; ),
        ( a:'#'; b:'#'; c:'03'; data:'121223'; ),
        ( a:'$'; b:'$'; c:'04'; data:'121322'; ),
        ( a:'%'; b:'%'; c:'05'; data:'131222'; ),
        ( a:'&'; b:'&'; c:'06'; data:'122213'; ),
        ( a:''''; b:''''; c:'07'; data:'122312'; ),
        ( a:'('; b:'('; c:'08'; data:'132212'; ),
        ( a:')'; b:')'; c:'09'; data:'221213'; ),
        ( a:'*'; b:'*'; c:'10'; data:'221312'; ),
        ( a:'+'; b:'+'; c:'11'; data:'231212'; ),
        ( a:'´'; b:'´'; c:'12'; data:'112232'; ),
        ( a:'-'; b:'-'; c:'13'; data:'122132'; ),
        ( a:'.'; b:'.'; c:'14'; data:'122231'; ),
        ( a:'/'; b:'/'; c:'15'; data:'113222'; ),
        ( a:'0'; b:'0'; c:'16'; data:'123122'; ),
        ( a:'1'; b:'1'; c:'17'; data:'123221'; ),
        ( a:'2'; b:'2'; c:'18'; data:'223211'; ),
        ( a:'3'; b:'3'; c:'19'; data:'221132'; ),
        ( a:'4'; b:'4'; c:'20'; data:'221231'; ),
        ( a:'5'; b:'5'; c:'21'; data:'213212'; ),
        ( a:'6'; b:'6'; c:'22'; data:'223112'; ),
        ( a:'7'; b:'7'; c:'23'; data:'312131'; ),
        ( a:'8'; b:'8'; c:'24'; data:'311222'; ),
        ( a:'9'; b:'9'; c:'25'; data:'321122'; ),
        ( a:':'; b:':'; c:'26'; data:'321221'; ),
        ( a:';'; b:';'; c:'27'; data:'312212'; ),
        ( a:'<'; b:'<'; c:'28'; data:'322112'; ),
        ( a:'='; b:'='; c:'29'; data:'322211'; ),
        ( a:'>'; b:'>'; c:'30'; data:'212123'; ),
        ( a:'?'; b:'?'; c:'31'; data:'212321'; ),
        ( a:'@'; b:'@'; c:'32'; data:'232121'; ),
        ( a:'A'; b:'A'; c:'33'; data:'111323'; ),
        ( a:'B'; b:'B'; c:'34'; data:'131123'; ),
        ( a:'C'; b:'C'; c:'35'; data:'131321'; ),
        ( a:'D'; b:'D'; c:'36'; data:'112313'; ),
        ( a:'E'; b:'E'; c:'37'; data:'132113'; ),
        ( a:'F'; b:'F'; c:'38'; data:'132311'; ),
        ( a:'G'; b:'G'; c:'39'; data:'211313'; ),
        ( a:'H'; b:'H'; c:'40'; data:'231113'; ),
        ( a:'I'; b:'I'; c:'41'; data:'231311'; ),
        ( a:'J'; b:'J'; c:'42'; data:'112133'; ),
        ( a:'K'; b:'K'; c:'43'; data:'112331'; ),
        ( a:'L'; b:'L'; c:'44'; data:'132131'; ),
        ( a:'M'; b:'M'; c:'45'; data:'113123'; ),
        ( a:'N'; b:'N'; c:'46'; data:'113321'; ),
        ( a:'O'; b:'O'; c:'47'; data:'133121'; ),
        ( a:'P'; b:'P'; c:'48'; data:'313121'; ),
        ( a:'Q'; b:'Q'; c:'49'; data:'211331'; ),
        ( a:'R'; b:'R'; c:'50'; data:'231131'; ),
        ( a:'S'; b:'S'; c:'51'; data:'213113'; ),
        ( a:'T'; b:'T'; c:'52'; data:'213311'; ),
        ( a:'U'; b:'U'; c:'53'; data:'213131'; ),
        ( a:'V'; b:'V'; c:'54'; data:'311123'; ),
        ( a:'W'; b:'W'; c:'55'; data:'311321'; ),
        ( a:'X'; b:'X'; c:'56'; data:'331121'; ),
        ( a:'Y'; b:'Y'; c:'57'; data:'312113'; ),
        ( a:'Z'; b:'Z'; c:'58'; data:'312311'; ),
        ( a:'['; b:'['; c:'59'; data:'332111'; ),
        ( a:'\'; b:'\'; c:'60'; data:'314111'; ),
        ( a:']'; b:']'; c:'61'; data:'221411'; ),
        ( a:'^'; b:'^'; c:'62'; data:'431111'; ),
        ( a:'_'; b:'_'; c:'63'; data:'111224'; ),
        ( a:' '; b:'`'; c:'64'; data:'111422'; ),
        ( a:' '; b:'a'; c:'65'; data:'121124'; ),
        ( a:' '; b:'b'; c:'66'; data:'121421'; ),
        ( a:' '; b:'c'; c:'67'; data:'141122'; ),
        ( a:' '; b:'d'; c:'68'; data:'141221'; ),
        ( a:' '; b:'e'; c:'69'; data:'112214'; ),
        ( a:' '; b:'f'; c:'70'; data:'112412'; ),
        ( a:' '; b:'g'; c:'71'; data:'122114'; ),
        ( a:' '; b:'h'; c:'72'; data:'122411'; ),
        ( a:' '; b:'i'; c:'73'; data:'142112'; ),
        ( a:' '; b:'j'; c:'74'; data:'142211'; ),
        ( a:' '; b:'k'; c:'75'; data:'241211'; ),
        ( a:' '; b:'l'; c:'76'; data:'221114'; ),
        ( a:' '; b:'m'; c:'77'; data:'413111'; ),
        ( a:' '; b:'n'; c:'78'; data:'241112'; ),
        ( a:' '; b:'o'; c:'79'; data:'134111'; ),
        ( a:' '; b:'p'; c:'80'; data:'111242'; ),
        ( a:' '; b:'q'; c:'81'; data:'121142'; ),
        ( a:' '; b:'r'; c:'82'; data:'121241'; ),
        ( a:' '; b:'s'; c:'83'; data:'114212'; ),
        ( a:' '; b:'t'; c:'84'; data:'124112'; ),
        ( a:' '; b:'u'; c:'85'; data:'124211'; ),
        ( a:' '; b:'v'; c:'86'; data:'411212'; ),
        ( a:' '; b:'w'; c:'87'; data:'421112'; ),
        ( a:' '; b:'x'; c:'88'; data:'421211'; ),
        ( a:' '; b:'y'; c:'89'; data:'212141'; ),
        ( a:' '; b:'z'; c:'90'; data:'214121'; ),
        ( a:' '; b:'{'; c:'91'; data:'412121'; ),
        ( a:' '; b:'|'; c:'92'; data:'111143'; ),
        ( a:' '; b:'}'; c:'93'; data:'111341'; ),
        ( a:' '; b:'~'; c:'94'; data:'131141'; ),
        ( a:' '; b:' '; c:'95'; data:'114113'; ),
        ( a:' '; b:' '; c:'96'; data:'114311'; ),
        ( a:' '; b:' '; c:'97'; data:'411113'; ),
        ( a:' '; b:' '; c:'98'; data:'411311'; ),
        ( a:' '; b:' '; c:'99'; data:'113141'; ),
        ( a:' '; b:' '; c:'  '; data:'114131'; ),
        ( a:' '; b:' '; c:'  '; data:'311141'; ),
        ( a:' '; b:' '; c:'  '; data:'411131'; )
        );

StartA = '211412';
StartB = '211214';
StartC = '211232';
Stop   = '2331112';




// find Code 128 Codeset A or B
function Find_Code128AB(c:char):integer;
var
  i:integer;
  v:char;
begin
  for i:=0 to High(tabelle_128) do
  begin
    if FTyp = bcCode128A then
       v := tabelle_128[i].a
    else
       v := tabelle_128[i].b;

    if c = v then
    begin
      result := i;
      exit;
    end;
  end;
  result := -1;
end;




var i, idx    : integer;
    startcode :string;
    vChecksum  : integer;

begin
  vChecksum := 0; // Added by TZ
  case FTyp of
    bcCode128A: begin
                  vChecksum := 103;
                  startcode:= StartA;
                end;
    bcCode128B: begin
                  vChecksum := 104;
                  startcode:= StartB;
                end;
    bcCode128C: begin
                  vChecksum := 105;
                  startcode:= StartC;
                end;
  end;

  result := Convert(startcode);    // Startcode

  if FTyp = bcCode128C then
      for i:=1 to Length(FText) div 2 do
      begin
              // not implemented !!!
      end
  else
    for i:=1 to Length(FText) do
    begin
      idx := Find_Code128AB(FText[i]);
      if idx < 0 then
         idx := Find_Code128AB(' ');
      result := result + Convert(tabelle_128[idx].data);
      Inc(vChecksum, idx*i);
    end;

  vChecksum := vChecksum mod 103;
  result := result + Convert(tabelle_128[vChecksum].data);

  result := result + Convert(Stop);      // Stopcode
end;





function TBarcode.Code_93:string;
type TCode93 =record
                c : char;
                data : array[0..5] of char;
              end;

const tabelle_93: array[0..46] of TCode93 = (
        ( c:'0'; data:'131112'  ),
        ( c:'1'; data:'111213'  ),
        ( c:'2'; data:'111312'  ),
        ( c:'3'; data:'111411'  ),
        ( c:'4'; data:'121113'  ),
        ( c:'5'; data:'121212'  ),
        ( c:'6'; data:'121311'  ),
        ( c:'7'; data:'111114'  ),
        ( c:'8'; data:'131211'  ),
        ( c:'9'; data:'141111'  ),
        ( c:'A'; data:'211113'  ),
        ( c:'B'; data:'211212'  ),
        ( c:'C'; data:'211311'  ),
        ( c:'D'; data:'221112'  ),
        ( c:'E'; data:'221211'  ),
        ( c:'F'; data:'231111'  ),
        ( c:'G'; data:'112113'  ),
        ( c:'H'; data:'112212'  ),
        ( c:'I'; data:'112311'  ),
        ( c:'J'; data:'122112'  ),
        ( c:'K'; data:'132111'  ),
        ( c:'L'; data:'111123'  ),
        ( c:'M'; data:'111222'  ),
        ( c:'N'; data:'111321'  ),
        ( c:'O'; data:'121122'  ),
        ( c:'P'; data:'131121'  ),
        ( c:'Q'; data:'212112'  ),
        ( c:'R'; data:'212211'  ),
        ( c:'S'; data:'211122'  ),
        ( c:'T'; data:'211221'  ),
        ( c:'U'; data:'221121'  ),
        ( c:'V'; data:'222111'  ),
        ( c:'W'; data:'112122'  ),
        ( c:'X'; data:'112221'  ),
        ( c:'Y'; data:'122121'  ),
        ( c:'Z'; data:'123111'  ),
        ( c:'-'; data:'121131'  ),
        ( c:'.'; data:'311112'  ),
        ( c:' '; data:'311211'  ),
        ( c:'$'; data:'321111'  ),
        ( c:'/'; data:'112131'  ),
        ( c:'+'; data:'113121'  ),
        ( c:'%'; data:'211131'  ),
        ( c:'['; data:'121221'  ),   // only used for Extended Code 93
        ( c:']'; data:'312111'  ),   // only used for Extended Code 93
        ( c:'{'; data:'311121'  ),   // only used for Extended Code 93
        ( c:'}'; data:'122211'  )    // only used for Extended Code 93
        );


// find Code 93
function Find_Code93(c:char):integer;
var i:integer;
begin
  for i:=0 to High(tabelle_93) do
  begin
    if c = tabelle_93[i].c then
    begin
      result := i;
      exit;
    end;
  end;
  result := -1;
end;




var
  i, idx : integer;
  checkC, checkK,   // Checksums
  weightC, weightK : integer;
begin
  result := Convert('111141');   // Startcode

  for i:=1 to Length(FText) do
  begin
    idx := Find_Code93(FText[i]);
    if idx < 0 then
            raise Exception.CreateFmt('%s:Code93 bad Data <%s>', [self.ClassName,FText]);
    result := result + Convert(tabelle_93[idx].data);
  end;

  checkC := 0;
  checkK := 0;

  weightC := 1;
  weightK := 2;

  for i:=Length(FText) downto 1 do
  begin
    idx := Find_Code93(FText[i]);

    Inc(checkC, idx*weightC);
    Inc(checkK, idx*weightK);

    Inc(weightC);
    if weightC > 20 then weightC := 1;
    Inc(weightK);
    if weightK > 15 then weightC := 1;
  end;

  Inc(checkK, checkC);

  checkC := checkC mod 47;
  checkK := checkK mod 47;

  result := result + Convert(tabelle_93[checkC].data) +
          Convert(tabelle_93[checkK].data);

  result := result + Convert('1111411');   // Stopcode
end;





function TBarcode.Code_93Extended:string;
const code93x : array[0..127] of string[2] =
        (
        (']U'), ('[A'), ('[B'), ('[C'), ('[D'), ('[E'), ('[F'), ('[G'),
        ('[H'), ('[I'), ('[J'), ('[K'), ('[L'), ('[M'), ('[N'), ('[O'),
        ('[P'), ('[Q'), ('[R'), ('[S'), ('[T'), ('[U'), ('[V'), ('[W'),
        ('[X'), ('[Y'), ('[Z'), (']A'), (']B'), (']C'), (']D'), (']E'),
         (' '), ('{A'), ('{B'), ('{C'), ('{D'), ('{E'), ('{F'), ('{G'),
        ('{H'), ('{I'), ('{J'), ('{K'), ('{L'), ('{M'), ('{N'), ('{O'),
        ( '0'),  ('1'),  ('2'),  ('3'),  ('4'),  ('5'),  ('6'),  ('7'),
         ('8'),  ('9'), ('{Z'), (']F'), (']G'), (']H'), (']I'), (']J'),
        (']V'),  ('A'),  ('B'),  ('C'),  ('D'),  ('E'),  ('F'),  ('G'),
         ('H'),  ('I'),  ('J'),  ('K'),  ('L'),  ('M'),  ('N'),  ('O'),
         ('P'),  ('Q'),  ('R'),  ('S'),  ('T'),  ('U'),  ('V'),  ('W'),
         ('X'),  ('Y'),  ('Z'), (']K'), (']L'), (']M'), (']N'), (']O'),
        (']W'), ('}A'), ('}B'), ('}C'), ('}D'), ('}E'), ('}F'), ('}G'),
        ('}H'), ('}I'), ('}J'), ('}K'), ('}L'), ('}M'), ('}N'), ('}O'),
        ('}P'), ('}Q'), ('}R'), ('}S'), ('}T'), ('}U'), ('}V'), ('}W'),
        ('}X'), ('}Y'), ('}Z'), (']P'), (']Q'), (']R'), (']S'), (']T')
        );

var
//      save:array[0..254] of char;
//      old:string;
        save : string;
        i : integer;
begin
//      CharToOem(PChar(FText), save);
  save := FText;
  FText := '';


  for i:=0 to Length(save)-1 do
  begin
          if ord(save[i]) <= 127 then
                  FText := FText + code93x[ord(save[i])];
  end;

//Showmessage(Format('Text: <%s>', [FText]));

  result := Code_93;
  FText := save;
end;



function TBarcode.Code_MSI:string;
const tabelle_MSI:array['0'..'9'] of string[8] =
        (
        ( '51515151' ),    // '0'
        ( '51515160' ),    // '1'
        ( '51516051' ),    // '2'
        ( '51516060' ),    // '3'
        ( '51605151' ),    // '4'
        ( '51605160' ),    // '5'
        ( '51606051' ),    // '6'
        ( '51606060' ),    // '7'
        ( '60515151' ),    // '8'
        ( '60515160' )     // '9'
        );

var
  i:integer;
  check_even, check_odd, vChecksum:integer;
begin
  result := '60';    // Startcode
  check_even := 0;
  check_odd  := 0;

  for i:=1 to Length(FText) do
  begin
    if odd(i-1) then
      check_odd := check_odd*10+ord(FText[i])
    else
      check_even := check_even+ord(FText[i]);

    result := result + tabelle_MSI[FText[i]];
  end;

  vChecksum := quersumme(check_odd*2) + check_even;

  vChecksum := vChecksum mod 10;
  if vChecksum > 0 then
       vChecksum := 10-vChecksum;

  result := result + tabelle_MSI[chr(ord('0')+vChecksum)];

  result := result + '515'; // Stopcode
end;



function TBarcode.Code_PostNet:string;
const tabelle_PostNet:array['0'..'9'] of string[10] =
        (
        ( '5151A1A1A1' ),    // '0'
        ( 'A1A1A15151' ),    // '1'
        ( 'A1A151A151' ),    // '2'
        ( 'A1A15151A1' ),    // '3'
        ( 'A151A1A151' ),    // '4'
        ( 'A151A151A1' ),    // '5'
        ( 'A15151A1A1' ),    // '6'
        ( '51A1A1A151' ),    // '7'
        ( '51A1A151A1' ),    // '8'
        ( '51A151A1A1' )     // '9'
        );
var
  i:integer;
begin
  result := '51';

  for i:=1 to Length(FText) do
  begin
          result := result + tabelle_PostNet[FText[i]];
  end;
  result := result + '5';
end;


function TBarcode.Code_Codabar:string;
type TCodabar =record
                c : char;
                data : array[0..6] of char;
               end;

const tabelle_cb: array[0..19] of TCodabar = (
        ( c:'1'; data:'5050615'  ),
        ( c:'2'; data:'5051506'  ),
        ( c:'3'; data:'6150505'  ),
        ( c:'4'; data:'5060515'  ),
        ( c:'5'; data:'6050515'  ),
        ( c:'6'; data:'5150506'  ),
        ( c:'7'; data:'5150605'  ),
        ( c:'8'; data:'5160505'  ),
        ( c:'9'; data:'6051505'  ),
        ( c:'0'; data:'5050516'  ),
        ( c:'-'; data:'5051605'  ),
        ( c:'$'; data:'5061505'  ),
        ( c:':'; data:'6050606'  ),
        ( c:'/'; data:'6060506'  ),
        ( c:'.'; data:'6060605'  ),
        ( c:'+'; data:'5060606'  ),
        ( c:'A'; data:'5061515'  ),
        ( c:'B'; data:'5151506'  ),
        ( c:'C'; data:'5051516'  ),
        ( c:'D'; data:'5051615'  )
        );



// find Codabar
function Find_Codabar(c:char):integer;
var i:integer;
begin
  for i:=0 to High(tabelle_cb) do
  begin
    if c = tabelle_cb[i].c then
    begin
      result := i;
      exit;
    end;
  end;
  result := -1;
end;

var
  i, idx : integer;
begin
  result := tabelle_cb[Find_Codabar('A')].data + '0';
  for i:=1 to Length(FText) do
  begin
    idx := Find_Codabar(FText[i]);
    result := result + tabelle_cb[idx].data + '0';
  end;
  result := result + tabelle_cb[Find_Codabar('B')].data;
end;

procedure TBarcode.MakeModules;
begin
  case Typ of
    bcCode_2_5_interleaved,
    bcCode_2_5_industrial,
    bcCode39,
    bcCodeEAN8,
    bcCodeEAN13,
    bcCode39Extended,
    bcCodeCodabar:
    begin
            if Ratio < 2.0 then Ratio := 2.0;
            if Ratio > 3.0 then Ratio := 3.0;
    end;

    bcCode_2_5_matrix:
    begin
            if Ratio < 2.25 then Ratio := 2.25;
            if Ratio > 3.0 then Ratio := 3.0;
    end;
    bcCode128A,
    bcCode128B,
    bcCode128C,
    bcCode93,
    bcCode93Extended,
    bcCodeMSI,
    bcCodePostNet:    ;
  end;


  modules[0] := FModul;
  modules[1] := Round(FModul*FRatio);
  modules[2] := modules[1] * 3 div 2;
  modules[3] := modules[1] * 2;
end;






{
Draw the Barcode

Parameter :
'data' holds the pattern for a Barcode.
A barcode begins always with a black line and
ends with a black line.

The white Lines builds the space between the black Lines.

A black line must always followed by a white Line and vica versa.

Examples:
        '50505'   // 3 thin black Lines with 2 thin white Lines
        '606'     // 2 fat black Lines with 1 thin white Line

        '5605015' // Error


data[] : see procedure OneBarProps

}
procedure TBarcode.DoLines(data:string; Canvas:TCanvas);

var i:integer;
    lt : TBarLineType;
    xadd:integer;   //
    w, h:integer;
    a,b,c,d,     // Edges of a line (we need 4 Point because the line
                                     // is a recangle
    orgin : TPoint;
    alpha:double;

begin
  xadd := 0;
  orgin.x := FLeft;
  orgin.y := FTop;
  alpha := FAngle*pi / 180.0;

  with Canvas do
  begin
    Pen.Width := 1;

    for i:=1 to Length(data) do  // examine the pattern string
    begin
     OneBarProps(data[i], w, lt);

      {
      case data[i] of
              '0': begin w := modules[0]; lt := white; end;
              '1': begin w := modules[1]; lt := white; end;
              '2': begin w := modules[2]; lt := white; end;
              '3': begin w := modules[3]; lt := white; end;


              '5': begin w := modules[0]; lt := black; end;
              '6': begin w := modules[1]; lt := black; end;
              '7': begin w := modules[2]; lt := black; end;
              '8': begin w := modules[3]; lt := black; end;

              'A': begin w := modules[0]; lt := black_half; end;
              'B': begin w := modules[1]; lt := black_half; end;
              'C': begin w := modules[2]; lt := black_half; end;
              'D': begin w := modules[3]; lt := black_half; end;


      else
              begin
              // something went wrong
              // mistyped pattern table
              raise Exception.CreateFmt('%s: internal Error', [self.ClassName]);
              end;
      end;
       }

      if (lt = black) or (lt = black_half) then
      begin
        Pen.Color := clBlack;
      end
      else
      begin
        Pen.Color := clWhite;
      end;
      Brush.Color := Pen.Color;

      if lt = black_half then
         H := FHeight * 2 div 5
      else
         H := FHeight;





      a.x := xadd;
      a.y := 0;

      b.x := xadd;
      b.y := H;

//                      c.x := xadd+width;
      c.x := xadd+W-1;  // 23.04.1999 Line was 1 Pixel too wide
      c.y := H;

//                      d.x := xadd+width;
      d.x := xadd+W-1;  // 23.04.1999 Line was 1 Pixel too wide
      d.y := 0;

      // a,b,c,d builds the rectangle we want to draw


      // rotate the rectangle
      a := Translate2D(Rotate2D(a, alpha), orgin);
      b := Translate2D(Rotate2D(b, alpha), orgin);
      c := Translate2D(Rotate2D(c, alpha), orgin);
      d := Translate2D(Rotate2D(d, alpha), orgin);

      // draw the rectangle
      Polygon([a,b,c,d]);

      xadd := xadd + w;
    end;
  end;
end;



procedure TBarcode.DrawBarcode(Canvas:TCanvas);
var
  data : string;
  SaveFont: TFont;
  SavePen: TPen;
  SaveBrush: TBrush;
begin
  Savefont  := TFont.Create;
  SavePen   := TPen.Create;
  SaveBrush := TBrush.Create;


  // get barcode pattern
  data := MakeData;


  try
    // store Canvas properties
    Savefont.Assign(Canvas.Font);
    SavePen.Assign(Canvas.Pen);
    SaveBrush.Assign(Canvas.Brush);

    DoLines(data, Canvas);    // draw the barcode

    if FShowText then
        DrawText(Canvas);   // show readable Text


    // restore old Canvas properties
    Canvas.Font.Assign(savefont);
    Canvas.Pen.Assign(SavePen);
    Canvas.Brush.Assign(SaveBrush);
  finally
    Savefont.Free;
    SavePen.Free;
    SaveBrush.Free;
  end;
end;


{
  draw contents and type/name of barcode
  as human readable text at the left
  upper edge of the barcode.

  main use for this procedure is testing.

  note: this procedure changes Pen and Brush
  of the current canvas.
}
procedure TBarcode.DrawText(Canvas:TCanvas);
begin
  with Canvas do
  begin
    Font.Size := 4;
    // the fixed font size is a problem, if you
    // use very large or small barcodes

    Pen.Color := clBlack;
    Brush.Color := clWhite;
    TextOut(FLeft, FTop, FText);         // contents of Barcode
    TextOut(FLeft, FTop+14, GetTypText); // type/name of barcode
  end;
end;


end.
