Borland Delphi
Barcode Recognition with Borland Delphi
Barcode Recognition Software
The Softek Barcode Toolkit is an application programmers toolkit which reads barcodes from image files and bitmaps - with a choice of 3 types of interface: DLL, OCX and COM
The following code was kindly provided by Marian Aldenhövel of MBA Software-Consulting.
unit SoftekBarCode;
{ (c)2003 Marian Aldenhövel MBA Software-Consulting
Rosenhain 23
53123 Bonn
marian@mba-software.de
This unit dynamically imports the functions from the Softek Barcode Library.
Usage:
- Call InitLibrary from somewhere in your program before calling any of
the functions.
- See the documentation from Softek for the use of the actual functions.
}
interface
uses Windows,SysUtils;
type short=shortint;
long=integer;
PLong=^long;
var stGetBitmapResolution:function():integer; stdcall;
stSetBitmapResolution:function(newValue:integer):integer; stdcall;
stGetDebugTraceFile:function():PChar; stdcall;
stSetDebugTraceFile:function(lpszNewValue:PChar):PChar; stdcall;
stGetLineJump:function():integer; stdcall;
stSetLineJump:function(nNewValue:integer):integer; stdcall;
stGetLowerRatio:function():double; stdcall;
stSetLowerRatio:function(newValue:double):double; stdcall;
stGetMinOccurrence:function():short; stdcall;
stSetMinOccurrence:function(nNewValue:short):short; stdcall;
stGetMultipleRead:function():bool; stdcall;
stSetMultipleRead:function(bNewValue:bool):bool; stdcall;
stGetNoiseReduction:function():short; stdcall;
stSetNoiseReduction:function(nNewValue:short):short; stdcall;
stGetPageNo:function():short; stdcall;
stSetPageNo:function(nNewValue:short):short; stdcall;
stGetPrefOccurrence:function():short; stdcall;
stSetPrefOccurrence:function(nNewValue:short):short; stdcall;
stGetQuietZoneSize:function():short; stdcall;
stSetQuietZoneSize:function(nNewValue:short):short; stdcall;
stGetRotation:function():short; stdcall;
stSetRotation:function(nNewValue:short):short; stdcall;
stGetUpperRatio:function():double; stdcall;
stSetUpperRatio:function(newValue:double):double; stdcall;
stGetReadCode39:function():bool; stdcall;
stSetReadCode39:function(bNewValue:bool):bool; stdcall;
stGetReadEAN13:function():bool; stdcall;
stSetReadEAN13:function(bNewValue:bool):bool; stdcall;
stGetReadEAN8:function():bool; stdcall;
stSetReadEAN8:function(bNewValue:bool):bool; stdcall;
stGetReadUPCA:function():bool; stdcall;
stSetReadUPCA:function(bNewValue:bool):bool; stdcall;
stGetReadUPCE:function():bool; stdcall;
stSetReadUPCE:function(bNewValue:bool):bool; stdcall;
stGetShowCheckDigit:function():bool; stdcall;
stSetShowCheckDigit:function(bNewValue:bool):bool; stdcall;
stGetReadCode128:function():bool; stdcall;
stSetReadCode128:function(bNewValue:bool):bool; stdcall;
stGetCode39NeedStartStop:function():bool; stdcall;
stSetCode39NeedStartStop:function(bNewValue:bool):bool; stdcall;
stGetReadCode25:function():bool; stdcall;
stSetReadCode25:function(bNewValue:bool):bool; stdcall;
stGetColorThreshold:function():short; stdcall;
stSetColorThreshold:function(nNewValue:short):short; stdcall;
stGetBarString:function(index:short):PChar; stdcall;
stScanBarCode:function(FileName:PChar):short; stdcall;
stScanBarCodeFromBitmap:function(hBitmap:long):short; stdcall;
stGetBarStringType:function(index:short):PChar; stdcall;
stGetBarStringPos:function(nBarCode:short;var pTopLeftX,pTopLeftY,pBotRightX,pBotRightY:Long):short; stdcall;
stSetScanRect:function(TopLeftX,TopLeftY,BottomRightX,BottomRightY:Long;MappingMode:short):bool; stdcall;
stGetReadPatchCodes:function():bool; stdcall;
stSetReadPatchCodes:function(bNewValue:bool):bool; stdcall;
stSaveBitmap:function(hBitmap:Long;strFilePath:PChar):bool; stdcall;
function stGetErrorString(ErrorCode:short):string;
procedure InitLibrary;
procedure DoneLibrary;
type ESoftekBarCodeError=class(Exception);
implementation
function stGetErrorString(ErrorCode:short):string;
begin
case ErrorCode of
-1:Result:='Error opening file';
-2:Result:='File is Multi Plane';
-3:Result:='Invalid number of bits per sample';
-4:Result:='Memory allocation error';
-5:Result:='Invalid TIF photometric value';
else Result:=Format('Unknown error %d',[ErrorCode]);
end;
end;
var LibraryHandle:THandle=0;
procedure InitLibrary;
function DoGetProcAdress(aName:string):pointer;
begin
Result:=GetProcAddress(LibraryHandle,PChar(aName));
if Result=NIL then RaiseLastOSError;
end;
begin
if LibraryHandle<>0 then exit;
LibraryHandle:=LoadLibrary('SoftekBarCode.dll');
if LibraryHandle=0 then RaiseLastOSError;
@stGetBitmapResolution:=DoGetProcAdress('stGetBitmapResolution');
@stSetBitmapResolution:=DoGetProcAdress('stSetBitmapResolution');
@stGetDebugTraceFile:=DoGetProcAdress('stGetDebugTraceFile');
@stSetDebugTraceFile:=DoGetProcAdress('stSetDebugTraceFile');
@stGetLineJump:=DoGetProcAdress('stGetLineJump');
@stSetLineJump:=DoGetProcAdress('stSetLineJump');
@stGetLowerRatio:=DoGetProcAdress('stGetLowerRatio');
@stSetLowerRatio:=DoGetProcAdress('stSetLowerRatio');
@stGetMinOccurrence:=DoGetProcAdress('stGetMinOccurrence');
@stSetMinOccurrence:=DoGetProcAdress('stSetMinOccurrence');
@stGetMultipleRead:=DoGetProcAdress('stGetMultipleRead');
@stSetMultipleRead:=DoGetProcAdress('stSetMultipleRead');
@stGetNoiseReduction:=DoGetProcAdress('stGetNoiseReduction');
@stSetNoiseReduction:=DoGetProcAdress('stSetNoiseReduction');
@stGetPageNo:=DoGetProcAdress('stGetPageNo');
@stSetPageNo:=DoGetProcAdress('stSetPageNo');
@stGetPrefOccurrence:=DoGetProcAdress('stGetPrefOccurrence');
@stSetPrefOccurrence:=DoGetProcAdress('stSetPrefOccurrence');
@stGetQuietZoneSize:=DoGetProcAdress('stGetQuietZoneSize');
@stSetQuietZoneSize:=DoGetProcAdress('stSetQuietZoneSize');
@stGetRotation:=DoGetProcAdress('stGetRotation');
@stSetRotation:=DoGetProcAdress('stSetRotation');
@stGetUpperRatio:=DoGetProcAdress('stGetUpperRatio');
@stSetUpperRatio:=DoGetProcAdress('stSetUpperRatio');
@stGetReadCode39:=DoGetProcAdress('stGetReadCode39');
@stSetReadCode39:=DoGetProcAdress('stSetReadCode39');
@stGetReadEAN13:=DoGetProcAdress('stGetReadEAN13');
@stSetReadEAN13:=DoGetProcAdress('stSetReadEAN13');
@stGetReadEAN8:=DoGetProcAdress('stGetReadEAN8');
@stSetReadEAN8:=DoGetProcAdress('stSetReadEAN8');
@stGetReadUPCA:=DoGetProcAdress('stGetReadUPCA');
@stSetReadUPCA:=DoGetProcAdress('stSetReadUPCA');
@stGetReadUPCE:=DoGetProcAdress('stGetReadUPCE');
@stSetReadUPCE:=DoGetProcAdress('stSetReadUPCE');
@stGetShowCheckDigit:=DoGetProcAdress('stGetShowCheckDigit');
@stSetShowCheckDigit:=DoGetProcAdress('stSetShowCheckDigit');
@stGetReadCode128:=DoGetProcAdress('stGetReadCode128');
@stSetReadCode128:=DoGetProcAdress('stSetReadCode128');
@stGetCode39NeedStartStop:=DoGetProcAdress('stGetCode39NeedStartStop');
@stSetCode39NeedStartStop:=DoGetProcAdress('stSetCode39NeedStartStop');
@stGetReadCode25:=DoGetProcAdress('stGetReadCode25');
@stSetReadCode25:=DoGetProcAdress('stSetReadCode25');
@stGetColorThreshold:=DoGetProcAdress('stGetColorThreshold');
@stSetColorThreshold:=DoGetProcAdress('stSetColorThreshold');
@stGetBarString:=DoGetProcAdress('stGetBarString');
@stScanBarCode:=DoGetProcAdress('stScanBarCode');
@stScanBarCodeFromBitmap:=DoGetProcAdress('stScanBarCodeFromBitmap');
@stGetBarStringType:=DoGetProcAdress('stGetBarStringType');
@stGetBarStringPos:=DoGetProcAdress('stGetBarStringPos');
@stSetScanRect:=DoGetProcAdress('stSetScanRect');
@stGetReadPatchCodes:=DoGetProcAdress('stGetReadPatchCodes');
@stSetReadPatchCodes:=DoGetProcAdress('stSetReadPatchCodes');
@stSaveBitmap:=DoGetProcAdress('stSaveBitmap');
end;
procedure DoneLibrary;
begin
if LibraryHandle=0 then exit;
if not FreeLibrary(LibraryHandle) then RaiseLastOSError;
stGetBitmapResolution:=NIL;
stSetBitmapResolution:=NIL;
stGetDebugTraceFile:=NIL;
stSetDebugTraceFile:=NIL;
stGetLineJump:=NIL;
stSetLineJump:=NIL;
stGetLowerRatio:=NIL;
stSetLowerRatio:=NIL;
stGetMinOccurrence:=NIL;
stSetMinOccurrence:=NIL;
stGetMultipleRead:=NIL;
stSetMultipleRead:=NIL;
stGetNoiseReduction:=NIL;
stSetNoiseReduction:=NIL;
stGetPageNo:=NIL;
stSetPageNo:=NIL;
stGetPrefOccurrence:=NIL;
stSetPrefOccurrence:=NIL;
stGetQuietZoneSize:=NIL;
stSetQuietZoneSize:=NIL;
stGetRotation:=NIL;
stSetRotation:=NIL;
stGetUpperRatio:=NIL;
stSetUpperRatio:=NIL;
stGetReadCode39:=NIL;
stSetReadCode39:=NIL;
stGetReadEAN13:=NIL;
stSetReadEAN13:=NIL;
stGetReadEAN8:=NIL;
stSetReadEAN8:=NIL;
stGetReadUPCA:=NIL;
stSetReadUPCA:=NIL;
stGetReadUPCE:=NIL;
stSetReadUPCE:=NIL;
stGetShowCheckDigit:=NIL;
stSetShowCheckDigit:=NIL;
stGetReadCode128:=NIL;
stSetReadCode128:=NIL;
stGetCode39NeedStartStop:=NIL;
stSetCode39NeedStartStop:=NIL;
stGetReadCode25:=NIL;
stSetReadCode25:=NIL;
stGetColorThreshold:=NIL;
stSetColorThreshold:=NIL;
stGetBarString:=NIL;
stScanBarCode:=NIL;
stScanBarCodeFromBitmap:=NIL;
stGetBarStringType:=NIL;
stGetBarStringPos:=NIL;
stSetScanRect:=NIL;
stGetReadPatchCodes:=NIL;
stSetReadPatchCodes:=NIL;
stSaveBitmap:=NIL;
end;
initialization
finalization
DoneLibrary;
end.
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