PrintSetPreRasterization Method (GdViewer)

In This Topic

Enables or disables the pre-rasterization parameter which specifies whether the pages of the document currently displayed in the GdViewer control must be pre-rasterized before being printed using the active printer. Enabling the pre-rasterization can dramatically improve the performance with printer drivers non-optimized for vector graphics rendering.

You can also define the rendering resolution using the PrintSetPreRasterizationDPI method when pre-rasterization is enabled.

Syntax

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

'Declaration
 
Public Function PrintSetPreRasterization( _
   ByVal PreRasterization As Boolean _
) As GdPictureStatus

public GdPictureStatus PrintSetPreRasterization( 
   bool PreRasterization
)

public function PrintSetPreRasterization( 
    PreRasterization: Boolean
): GdPictureStatus;

public function PrintSetPreRasterization( 
   PreRasterization : boolean
) : GdPictureStatus;

public: GdPictureStatus PrintSetPreRasterization( 
   bool PreRasterization
)

public:
GdPictureStatus PrintSetPreRasterization( 
   bool PreRasterization
)

Parameters

PreRasterization: Set this parameter to true if you want to enable the pre-rasterization, otherwise set it to false. The default value is false.

Return Value

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

We strongly recommend always checking this status first.

Remarks

It is recommend to use the GetStat method or the PrintGetStat method to identify the specific reason for the method's failure, if any.

Just to remind you that the active printer is the printer identified by the PrintGetActivePrinter method or set by the PrintSetActivePrinter method and it is dedicated to executing all subsequent print jobs using this class as well as utilizing all by you altered printer settings.

Example

How to enable the pre-rasterization option when printing the displayed document.

VB.NET
C#

'We assume that the GdViewer1 control has been properly integrated.
If GdViewer1.DisplayFromFile("") = GdPictureStatus.OK Then
    'enable pre-rasterization option
    GdViewer1.PrintSetPreRasterization(True)
    GdViewer1.PrintSetPreRasterizationDPI(300)
    If GdViewer1.Print(PrintSizeOption.PrintSizeOptionActual) = GdPictureStatus.OK Then
        MessageBox.Show("The file has been printed successfully.", "GdViewer.PrintSetPreRasterization")
    Else
        Dim message As String = "The file can't be printed." + vbCrLf + "Status: " + GdViewer1.GetStat().ToString()
        If GdViewer1.PrintGetStat() = GdPictureStatus.PrintingException Then message = message + "    Error: " + GdViewer1.PrintGetLastError()
        MessageBox.Show(message, "GdViewer.PrintSetPreRasterization")
    End If
    GdViewer1.CloseDocument()
Else
    MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PrintSetPreRasterization")
End If

//We assume that the GdViewer1 control has been properly integrated.
if (GdViewer1.DisplayFromFile("") == GdPictureStatus.OK)
{
    //enable pre-rasterization option
    GdViewer1.PrintSetPreRasterization(true);
    GdViewer1.PrintSetPreRasterizationDPI(300);
    if (GdViewer1.Print(PrintSizeOption.PrintSizeOptionActual) == GdPictureStatus.OK)
    {
        MessageBox.Show("The file has been printed successfully.", "GdViewer.PrintSetPreRasterization");
    }
    else
    {
        string message = "The file can't be printed.\nStatus: " + GdViewer1.GetStat().ToString();
        if (GdViewer1.PrintGetStat() == GdPictureStatus.PrintingException)
            message = message + "    Error: " + GdViewer1.PrintGetLastError();
        MessageBox.Show(message, "GdViewer.PrintSetPreRasterization");
    }
    GdViewer1.CloseDocument();
}
else
{
    MessageBox.Show("The file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.PrintSetPreRasterization");
}

Reference

GdViewer Class
GdViewer Members
PrintSetPreRasterizationDPI Method
PrintGetActivePrinter Method
PrintSetActivePrinter Method
PrintGetStat Method
Print Method