' The project, which uses this code, must have references to the following assemblies:
' - Vintasoft.Imaging
' - Vintasoft.Imaging.Pdf

''' <summary>
''' Converts a PDF document to conformance with PDF/A-1b specification.
''' </summary>
''' <param name="pdfFilename">The filename of source PDF document.</param>
''' <param name="outputPdfFilename">The filename of output PDF document.</param>
Public Shared Sub ConvertDocumentToPdfA1b(pdfFilename As String, outputPdfFilename As String)
        ' determine that file must converted to the PDF/A-1b and saved back to the source file
        Dim sameFile As Boolean = pdfFilename.ToUpperInvariant() = outputPdfFilename.ToUpperInvariant()

        ' create the PDF/A-1b converter
        Dim converter As New Vintasoft.Imaging.Pdf.Processing.PdfA.PdfA1bConverter()
        converter.LzwFixupCompression = Vintasoft.Imaging.Pdf.PdfCompression.Zip
        ' converter.OutputIntentDestIccProfile = ...

        ' execute the conversion
        System.Console.WriteLine("Conversion...")
        Dim result As Vintasoft.Imaging.Processing.ConversionProfileResult = converter.Convert(pdfFilename, outputPdfFilename, New Vintasoft.Imaging.Processing.ProcessingState())

        ' if PDF document is converted successfully
        If result.IsSuccessful Then
                System.Console.WriteLine("Document converted to PDF/A-1b.")
        Else
                ' if PDF document is NOT converted
                If Not sameFile Then
                        System.IO.File.Delete(outputPdfFilename)
                End If

                Throw result.CreateConversionException()
        End If
End Sub

' The project, which uses this code, must have references to the following assemblies:
' - Vintasoft.Imaging
' - Vintasoft.Imaging.Pdf

''' <summary>
''' Converts a PDF document to conformance with PDF/A-1b specification and
''' shows the detailed result of conversion.
''' </summary>
''' <param name="pdfFilename">The filename of source PDF document.</param>
''' <param name="outputPdfFilename">The filename of output PDF document.</param>
Public Shared Sub ConvertDocumentToPdfA1bDetalied(pdfFilename As String, outputPdfFilename As String)
        ' determine that file must converted to the PDF/A-1b and saved back to the source file
        Dim sameFile As Boolean = pdfFilename.ToUpperInvariant() = outputPdfFilename.ToUpperInvariant()

        ' create the PDF/A-1b converter
        Dim converter As New Vintasoft.Imaging.Pdf.Processing.PdfA.PdfA1bConverter()
        converter.LzwFixupCompression = Vintasoft.Imaging.Pdf.PdfCompression.Zip
        ' converter.OutputIntentDestIccProfile = ...

        Using processingState As New Vintasoft.Imaging.Processing.ProcessingState()
                ' subscribe to the events for monitoring the progress
                AddHandler processingState.Progress, New System.EventHandler(Of Vintasoft.Imaging.ProgressEventArgs)(AddressOf convertProcessingState_Progress)

                ' execute the conversion
                Dim result As Vintasoft.Imaging.Processing.ConversionProfileResult = converter.Convert(pdfFilename, outputPdfFilename, processingState)
                System.Console.WriteLine("finished.")

                ' if PDF document is converted successfully
                If result.IsSuccessful Then
                        System.Console.WriteLine("Document converted to PDF/A-1b.")
                Else
                        ' if PDF document is NOT converted
                        If Not sameFile Then
                                System.IO.File.Delete(outputPdfFilename)
                        End If

                        System.Console.WriteLine("Cannot convert document to PDF/A-1b, unsolved problems:")
                        ' for each activated trigger
                        For Each command As Vintasoft.Imaging.Processing.IProcessingCommandInfo In result.ActivatedTriggers.Keys
                                ' output information about activated trigger
                                System.Console.WriteLine(String.Format("  {0} ({1} matches)", command, result.ActivatedTriggers(command).Count))
                        Next
                End If
        End Using
End Sub

''' <summary>
''' Handles the Progress event of the ProcessingState.
''' </summary>
Private Shared Sub convertProcessingState_Progress(sender As Object, e As Vintasoft.Imaging.ProgressEventArgs)
        System.Console.CursorLeft = 0
        System.Console.Write(String.Format("Conversion {0}%...", e.Progress))
End Sub