DetectPageBarcodesJSONA

Barcode recognition, document inspection, rendering

Description

ANSI variant of DetectPageBarcodesJSON

Accepts string parameters as ANSI text and otherwise behaves identically to the wide-string entry point

Syntax

Delphi

Function TPDFlib.DetectPageBarcodesJSON(Page: Integer;
  Left, Top, Width, Height, DPI: Double; Formats: Integer= 0;
  Options: Integer= 0; MaxResults: Integer= 32): WideString;

ActiveX

Function PDFlib::DetectPageBarcodesJSON(Page As Long,
  Left As Double, Top As Double, Width As Double, Height As Double,
  DPI As Double, Formats As Long, Options As Long,
  MaxResults As Long) As String

DLL

const wchar_t* DLDetectPageBarcodesJSON(int InstanceID, int Page,
  double Left, double Top, double Width, double Height, double DPI,
  int Formats, int Options, int MaxResults);
const char* DLDetectPageBarcodesJSONA(int InstanceID, int Page,
  double Left, double Top, double Width, double Height, double DPI,
  int Formats, int Options, int MaxResults);

Return values

Returns a JSON object containing the page, effective DPI, requested region, result count, and result objects with formatName, text, content type, symbology identifier, error-correction level, orientation, validity flags, four page-space corner points, and bounds

Returns an empty string when validation, rendering, backend loading, or recognition fails

Remarks

The method renders only the requested region into a bounded top-down BGR bitmap and restores the previously selected page before returning

Deploy PDFlibBarcode32.dll or PDFlibBarcode64.dll beside the host executable, PDFlib DLL, or ActiveX module according to process architecture; PDFLIB_BARCODE_READER may specify an alternate absolute backend path

LastErrorCode is 115 for invalid page, geometry, masks, resolution, or limits and 519 for rendering, backend, or recognition failures