Converting PDF to multipage TIFF with GdPicture.NET 8

[Loïc]

Here an example of how to use GdPicture.NET 8 to convert multipage PDF to multipage TIFF.

Code: Select all

 
      Dim oGdPictureImaging As New GdPictureImaging()
      Dim oGdPicturePDF As New GdPicturePDF


      If oGdPicturePDF.LoadFromFile("c:\test.pdf", False) = GdPictureStatus.OK Then
         Dim TiffID As Integer
         For i As Integer = 1 To oGdPicturePDF.GetPageCount()
            oGdPicturePDF.SelectPage(i)
            Dim RasterPageID As Integer = oGdPicturePDF.RenderPageToGdPictureImageEx(200, True) '200 DPI rendering with form fields, or native image extraction if the page is image based
            'Convert rendered page to bitonal
            oGdPictureImaging.ConvertTo1Bpp(RasterPageID) 'Remove this line if you want to obtain colour tiff image
            If i = 1 Then
               TiffID = RasterPageID
               oGdPictureImaging.TiffSaveAsMultiPageFile(TiffID, "c:\multipage.tif", TiffCompression.TiffCompressionAUTO)
            Else
               oGdPictureImaging.TiffAddToMultiPageFile(TiffID, RasterPageID)
            End If
            oGdPictureImaging.ReleaseGdPictureImage(RasterPageID)
         Next
         oGdPictureImaging.TiffCloseMultiPageFile(TiffID)
         oGdPicturePDF.CloseDocument()
         MsgBox("Done!")
      Else
         MsgBox("can't open PDF")
      End If