Codecs: How to convert PDF to TIFF?

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SDK needs to render PDF page (draw text, images and graphics on PDF page) when converting PDF document to TIFF file.

By default SDK:

Renders PDF page with 96 dpi resolution.
Searches external font in directory "$ASSEMBLY_DIRECTORY$\Fonts\" and in fonts directory of the operation system.
Does not draw text on PDF page if external font of text is not found.

You need override algorithm for searching external fonts if PDF document contains not standard external fonts. This can be done using the UserAndSystemFontProgramsController class.
More info about fonts in PDF document can be found here.

Here is an example that shows how to convert PDF document to TIFF file using image collection and TiffEncoder:

VB.NET

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

''' <summary>
''' Class shows how to convert PDF document to TIFF file using ImageCollection and TiffEncoder classes.
''' </summary>
Public Class ConvertPdfToTiffUsingEncoder

    ''' <summary>
    ''' Converts PDF document to TIFF file using ImageCollection and TiffEncoder classes.
    ''' </summary>
    Public Shared Sub Convert(pdfFileName As String, tiffFileName As String)
        ' create image collection
        Using imageCollection As New Vintasoft.Imaging.ImageCollection()
            ' add PDF document to collection
            imageCollection.Add(pdfFileName)

            ' create TiffEncoder
            Using tiffEncoder As New Vintasoft.Imaging.Codecs.Encoders.TiffEncoder(True)
                ' set TIFF compression to Zip
                tiffEncoder.Settings.Compression = Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffCompression.Zip

                ' save images of image collection to TIFF file using TiffEncoder
                imageCollection.SaveSync(tiffFileName, tiffEncoder)
            End Using

            ' dispose images
            imageCollection.ClearAndDisposeItems()
        End Using
    End Sub

End Class

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

/// <summary>
/// Class shows how to convert PDF document to TIFF file using ImageCollection and TiffEncoder classes.
/// </summary>
public class ConvertPdfToTiffUsingEncoder
{

    /// <summary>
    /// Converts PDF document to TIFF file using ImageCollection and TiffEncoder classes.
    /// </summary>
    public static void Convert(string pdfFileName, string tiffFileName)
    {
        // create image collection
        using (Vintasoft.Imaging.ImageCollection imageCollection = 
            new Vintasoft.Imaging.ImageCollection())
        {
            // add PDF document to collection
            imageCollection.Add(pdfFileName);

            // create TiffEncoder
            using (Vintasoft.Imaging.Codecs.Encoders.TiffEncoder tiffEncoder = 
                new Vintasoft.Imaging.Codecs.Encoders.TiffEncoder(true))
            {
                // set TIFF compression to Zip
                tiffEncoder.Settings.Compression = 
                    Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffCompression.Zip;

                // save images of image collection to TIFF file using TiffEncoder
                imageCollection.SaveSync(tiffFileName, tiffEncoder);
            }

            // dispose images
            imageCollection.ClearAndDisposeItems();
        }
    }

}

Here is an example that shows how to convert PDF document to TIFF file using PdfDocument and TiffFile

VB.NET

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

''' <summary>
''' Class shows how to convert PDF document to TIFF file using PdfDocument and TiffFile classes.
''' </summary>
Public Class ConvertPdfToTiffUseImageFile
    ''' <summary>
    ''' Converts PDF document to TIFF file using PdfDocument and TiffFile classes.
    ''' </summary>
    Public Shared Sub Convert(pdfFileName As String, tiffFileName As String)
        ' open existing PDF document
        Using pdfDocument As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
            ' create new TIFF file
            Using tiffFile As New Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile(tiffFileName, Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFileFormat.LittleEndian)
                ' set TIFF compression to Zip
                tiffFile.Pages.EncoderSettings.Compression = Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffCompression.Zip
                ' for each PDF page
                For i As Integer = 0 To pdfDocument.Pages.Count - 1
                    ' render PDF page and add as image to Tiff file
                    tiffFile.Pages.Add(pdfDocument.Pages(i).Render())
                    ' save changes to TIFF file
                    tiffFile.SaveChanges()
                Next
            End Using
        End Using
    End Sub
End Class

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

/// <summary>
/// Class shows how to convert PDF document to TIFF file using PdfDocument and TiffFile classes.
/// </summary>
public class ConvertPdfToTiffUseImageFile
{
    /// <summary>
    /// Converts PDF document to TIFF file using PdfDocument and TiffFile classes.
    /// </summary>
    public static void Convert(string pdfFileName, string tiffFileName)
    {
        // open existing PDF document
        using (Vintasoft.Imaging.Pdf.PdfDocument pdfDocument = new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
        {
            // create new TIFF file
            using (Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile tiffFile = 
                new Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile(tiffFileName, 
                    Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFileFormat.LittleEndian))
            {
                // set TIFF compression to Zip
                tiffFile.Pages.EncoderSettings.Compression = 
                    Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffCompression.Zip;
                // for each PDF page
                for (int i = 0; i < pdfDocument.Pages.Count; i++)
                {
                    // render PDF page and add as image to Tiff file
                    tiffFile.Pages.Add(pdfDocument.Pages[i].Render());
                    // save changes to TIFF file
                    tiffFile.SaveChanges();
                }
            }
        }
    }
}

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