GetFontData Method (GdPicturePDF)

In This Topic

Returns, in other words extracts, the embedded font program of the font used in the currently loaded PDF document according to the font index you have specified. You can use the GdPicturePDF.GetFontCount method to determine the number of all used fonts in the PDF document. The font index is simply an integer value from 1 to GdPicturePDF.GetFontCount.

A font program can be embedded in a PDF file as data contained in a PDF stream object. Such a stream object is also called a font file by analogy with font programs that are available from sources external to the consumer application.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration

 

Public Function GetFontData( _

   ByVal FontIdx As Integer, _

   ByRef Data() As Byte _

) As GdPictureStatus

public GdPictureStatus GetFontData( 

   int FontIdx,

   ref byte[] Data

)

public function GetFontData( 

    FontIdx: Integer;

   var  Data: Bytearray of

): GdPictureStatus;

public function GetFontData( 

   FontIdx : int,

   Data : byte[]

) : GdPictureStatus;

public: GdPictureStatus GetFontData( 

   int FontIdx,

   ref byte[]* Data

)

public:

GdPictureStatus GetFontData( 

   int FontIdx,

   array<byte>^% Data

)

Parameters

FontIdx: The font index. It must be a value from 1 to GdPicturePDF.GetFontCount.
Data: Output parameter. An array of bytes containing the uncompressed content (data) of the embedded font program.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.

Remarks

This method is only allowed for use with non-encrypted documents.

Be aware that the font program, which you are going to extract, needs to be embedded in the PDF document. Using this method you are allowed to extract a font program, that is embedded as subset as well.

Example

How to extract the font program for all embedded fonts used in the PDF document.

VB.NET
C#

Dim gdpicturePDF As New GdPicturePDF()

Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False)

If status = GdPictureStatus.OK Then

    Dim fontCount As Integer = gdpicturePDF.GetFontCount()

    status = gdpicturePDF.GetStat()

    If status = GdPictureStatus.OK Then

        Dim output As String = "The number of fonts used in this document is " + fontCount.ToString() + "." + vbCrLf + vbCrLf

        For i As Integer = 1 To fontCount

            output = output + i.ToString() + ". Font: "

            Dim fontName As String = gdpicturePDF.GetFontName(i)

            status = gdpicturePDF.GetStat()

            If status = GdPictureStatus.OK Then

                output = output + "  Name = " + fontName

            Else

                output = output + "  Name = Error (" + status.ToString() + ")"

            End If

            

            Dim fontEmbedded As Boolean = gdpicturePDF.IsFontEmbedded(i)

            status = gdpicturePDF.GetStat()

            If status = GdPictureStatus.OK Then

                output = output + ";  Embedded = " + fontEmbedded.ToString() + vbCrLf

                If fontEmbedded Then

                    Dim fontData As Byte() = Nothing

                    Dim fontFileData As String = fontName + "_fontData.dat"

                    status = gdpicturePDF.GetFontData(i, fontData)

                    If status = GdPictureStatus.OK Then

                        Dim oFileStream As System.IO.FileStream = Nothing

                        oFileStream = New System.IO.FileStream(fontFileData, System.IO.FileMode.Create)

                        oFileStream.Write(fontData, 0, fontData.Length)

                        oFileStream.Close()

                        output = output + ";  Font data have been saved." + vbCrLf

                    Else

                        output = output + ";  Font data have NOT been saved. Error (" + status.ToString() + ")" + vbCrLf

                    End If

                End If

            Else

                output = output + ";  Embedded = Error (" + status.ToString() + ")" + vbCrLf

            End If

        Next

        MessageBox.Show(output, "Example: GetFontData")

    Else

        MessageBox.Show("The GetFontCount() method has failed with the status: " + status.ToString(), "Example: GetFontData")

    End If

Else

    MessageBox.Show("The file can't be loaded.", "Example: GetFontData")

End If

gdpicturePDF.Dispose()

GdPicturePDF gdpicturePDF = new GdPicturePDF();

GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false);

if (status == GdPictureStatus.OK)

{

    int fontCount = gdpicturePDF.GetFontCount();

    status = gdpicturePDF.GetStat();

    if (status == GdPictureStatus.OK)

    {

        string output = "The number of fonts used in this document is " + fontCount.ToString() + ".\n\n";

        for (int i = 1; i <= fontCount; i++)

        {

            output = output + i.ToString() + ". Font: ";

            string fontName = gdpicturePDF.GetFontName(i);

            status = gdpicturePDF.GetStat();

            if (status == GdPictureStatus.OK)

                output = output + "  Name = " + fontName;

            else

                output = output + "  Name = Error (" + status.ToString() + ")";

            

            bool fontEmbedded = gdpicturePDF.IsFontEmbedded(i);

            status = gdpicturePDF.GetStat();

            if (status == GdPictureStatus.OK)

            {

                output = output + ";  Embedded = " + fontEmbedded.ToString() + "\n";

                if (fontEmbedded)

                {

                    byte[] fontData = null;

                    string fontFileData = fontName + "_fontData.dat";

                    status = gdpicturePDF.GetFontData(i, ref fontData);

                    if (status == GdPictureStatus.OK)

                    {

                        System.IO.FileStream oFileStream = default(System.IO.FileStream);

                        oFileStream = new System.IO.FileStream(fontFileData, System.IO.FileMode.Create);

                        oFileStream.Write(fontData, 0, fontData.Length);

                        oFileStream.Close();

                        output = output + ";  Font data have been saved.\n";

                    }

                    else

                        output = output + ";  Font data have NOT been saved. Error (" + status.ToString() + ")\n";

                }

            }

            else

                output = output + ";  Embedded = Error (" + status.ToString() + ")\n";

        }

        MessageBox.Show(output, "Example: GetFontData");

    }

    else

    {

        MessageBox.Show("The GetFontCount() method has failed with the status: " + status.ToString(), "Example: GetFontData");

    }

}

else

{

    MessageBox.Show("The file can't be loaded.", "Example: GetFontData");

}

gdpicturePDF.Dispose();

Example

How to extract the font program for all embedded fonts used in the PDF document. Dim gdpicturePDF As New GdPicturePDF() Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False) If status = GdPictureStatus.OK Then Dim fontCount As Integer = gdpicturePDF.GetFontCount() status = gdpicturePDF.GetStat() If status = GdPictureStatus.OK Then Dim output As String = "The number of fonts used in this document is " + fontCount.ToString() + "." + vbCrLf + vbCrLf For i As Integer = 1 To fontCount output = output + i.ToString() + ". Font: " Dim fontName As String = gdpicturePDF.GetFontName(i) status = gdpicturePDF.GetStat() If status = GdPictureStatus.OK Then output = output + " Name = " + fontName Else output = output + " Name = Error (" + status.ToString() + ")" End If Dim fontEmbedded As Boolean = gdpicturePDF.IsFontEmbedded(i) status = gdpicturePDF.GetStat() If status = GdPictureStatus.OK Then output = output + "; Embedded = " + fontEmbedded.ToString() + vbCrLf If fontEmbedded Then Dim fontData As Byte() = Nothing Dim fontFileData As String = fontName + "_fontData.dat" status = gdpicturePDF.GetFontData(i, fontData) If status = GdPictureStatus.OK Then Dim oFileStream As System.IO.FileStream = Nothing oFileStream = New System.IO.FileStream(fontFileData, System.IO.FileMode.Create) oFileStream.Write(fontData, 0, fontData.Length) oFileStream.Close() output = output + "; Font data have been saved." + vbCrLf Else output = output + "; Font data have NOT been saved. Error (" + status.ToString() + ")" + vbCrLf End If End If Else output = output + "; Embedded = Error (" + status.ToString() + ")" + vbCrLf End If Next MessageBox.Show(output, "Example: GetFontData") Else MessageBox.Show("The GetFontCount() method has failed with the status: " + status.ToString(), "Example: GetFontData") End If Else MessageBox.Show("The file can't be loaded.", "Example: GetFontData") End If gdpicturePDF.Dispose() GdPicturePDF gdpicturePDF = new GdPicturePDF(); GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false); if (status == GdPictureStatus.OK) { int fontCount = gdpicturePDF.GetFontCount(); status = gdpicturePDF.GetStat(); if (status == GdPictureStatus.OK) { string output = "The number of fonts used in this document is " + fontCount.ToString() + ".\n\n"; for (int i = 1; i <= fontCount; i++) { output = output + i.ToString() + ". Font: "; string fontName = gdpicturePDF.GetFontName(i); status = gdpicturePDF.GetStat(); if (status == GdPictureStatus.OK) output = output + " Name = " + fontName; else output = output + " Name = Error (" + status.ToString() + ")"; bool fontEmbedded = gdpicturePDF.IsFontEmbedded(i); status = gdpicturePDF.GetStat(); if (status == GdPictureStatus.OK) { output = output + "; Embedded = " + fontEmbedded.ToString() + "\n"; if (fontEmbedded) { byte[] fontData = null; string fontFileData = fontName + "_fontData.dat"; status = gdpicturePDF.GetFontData(i, ref fontData); if (status == GdPictureStatus.OK) { System.IO.FileStream oFileStream = default(System.IO.FileStream); oFileStream = new System.IO.FileStream(fontFileData, System.IO.FileMode.Create); oFileStream.Write(fontData, 0, fontData.Length); oFileStream.Close(); output = output + "; Font data have been saved.\n"; } else output = output + "; Font data have NOT been saved. Error (" + status.ToString() + ")\n"; } } else output = output + "; Embedded = Error (" + status.ToString() + ")\n"; } MessageBox.Show(output, "Example: GetFontData"); } else { MessageBox.Show("The GetFontCount() method has failed with the status: " + status.ToString(), "Example: GetFontData"); } } else { MessageBox.Show("The file can't be loaded.", "Example: GetFontData"); } gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
GetFontCount Method
GetFontCount Method
GetFontCount Method
GetFontCount Method
GetFontEncoding Method
GetFontName Method
GetFontType Method
IsFontEmbedded Method