ClipPathOdd Method (GdPicturePDF)
In This Topic
Modifies the currently specified clipping path by intersecting it with the currently constructed path, defined within a currently selected page of the loaded PDF document. This method uses
the even-odd rule to determine which regions lie inside the clipping path. In other words, this method sets the clipping path operator "W*".
The clipping path is part of the graphics state and thus it is affected by the currently specified graphics state parameters (see PDF Reference, Section "Clipping Path Operators").
Syntax
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.
Example
How to utilize a clipping path to draw your images. The examples below show you the difference between the nonzero winding number rule and the even-odd rule.
Dim caption As String = "Example: ClipPathOdd"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.NewPDF()
If status = GdPictureStatus.OK Then
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft)
If (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetFillColor(0, 0, 128) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.BeginPath(250, 100) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(100, 350) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(390, 170) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(110, 170) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(400, 350) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClosePath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClipPath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.DrawRectangle(0, 0, 612, 400, True, False) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetFillColor(0, 0, 128) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.BeginPath(250, 400) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(100, 650) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(390, 470) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(110, 470) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(400, 650) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClosePath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClipPathOdd() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.DrawRectangle(0, 400, 612, 800, True, False) = GdPictureStatus.OK) Then
status = gdpicturePDF.SaveToFile("test_ClipPathOdd.pdf")
If status = GdPictureStatus.OK Then
MessageBox.Show("The example has been followed successfully and the file has been saved.", caption)
Else
MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The example has not been followed successfully." + vbCrLf + "The last known status is " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: ClipPathOdd";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.NewPDF();
if (status == GdPictureStatus.OK)
{
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft);
if ((gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK) &&
(gdpicturePDF.SetFillColor(0, 0, 128) == GdPictureStatus.OK) &&
(gdpicturePDF.BeginPath(250, 100) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(100, 350) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(390, 170) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(110, 170) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(400, 350) == GdPictureStatus.OK) &&
(gdpicturePDF.ClosePath() == GdPictureStatus.OK) &&
(gdpicturePDF.ClipPath() == GdPictureStatus.OK) &&
(gdpicturePDF.DrawRectangle(0, 0, 612, 400, true, false) == GdPictureStatus.OK) &&
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK) &&
(gdpicturePDF.SetFillColor(0, 0, 128) == GdPictureStatus.OK) &&
(gdpicturePDF.BeginPath(250, 400) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(100, 650) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(390, 470) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(110, 470) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(400, 650) == GdPictureStatus.OK) &&
(gdpicturePDF.ClosePath() == GdPictureStatus.OK) &&
(gdpicturePDF.ClipPathOdd() == GdPictureStatus.OK) &&
(gdpicturePDF.DrawRectangle(0, 400, 612, 800, true, false) == GdPictureStatus.OK))
{
status = gdpicturePDF.SaveToFile("test_ClipPathOdd.pdf");
if (status == GdPictureStatus.OK)
MessageBox.Show("The example has been followed successfully and the file has been saved.", caption);
else
MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption);
}
else
MessageBox.Show("The example has not been followed successfully.\nThe last known status is " + gdpicturePDF.GetStat().ToString(), caption);
}
else
MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption);
gdpicturePDF.Dispose();
Example
How to utilize a clipping path to draw your images. The examples below show you the difference between the nonzero winding number rule and the even-odd rule.
Dim caption As String = "Example: ClipPathOdd"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.NewPDF()
If status = GdPictureStatus.OK Then
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft)
If (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetFillColor(0, 0, 128) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.BeginPath(250, 100) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(100, 350) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(390, 170) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(110, 170) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(400, 350) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClosePath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClipPath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.DrawRectangle(0, 0, 612, 400, True, False) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetFillColor(0, 0, 128) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.BeginPath(250, 400) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(100, 650) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(390, 470) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(110, 470) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.AddLineToPath(400, 650) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClosePath() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.ClipPathOdd() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.DrawRectangle(0, 400, 612, 800, True, False) = GdPictureStatus.OK) Then
status = gdpicturePDF.SaveToFile("test_ClipPathOdd.pdf")
If status = GdPictureStatus.OK Then
MessageBox.Show("The example has been followed successfully and the file has been saved.", caption)
Else
MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The example has not been followed successfully." + vbCrLf + "The last known status is " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: ClipPathOdd";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.NewPDF();
if (status == GdPictureStatus.OK)
{
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft);
if ((gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK) &&
(gdpicturePDF.SetFillColor(0, 0, 128) == GdPictureStatus.OK) &&
(gdpicturePDF.BeginPath(250, 100) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(100, 350) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(390, 170) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(110, 170) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(400, 350) == GdPictureStatus.OK) &&
(gdpicturePDF.ClosePath() == GdPictureStatus.OK) &&
(gdpicturePDF.ClipPath() == GdPictureStatus.OK) &&
(gdpicturePDF.DrawRectangle(0, 0, 612, 400, true, false) == GdPictureStatus.OK) &&
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK) &&
(gdpicturePDF.SetFillColor(0, 0, 128) == GdPictureStatus.OK) &&
(gdpicturePDF.BeginPath(250, 400) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(100, 650) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(390, 470) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(110, 470) == GdPictureStatus.OK) &&
(gdpicturePDF.AddLineToPath(400, 650) == GdPictureStatus.OK) &&
(gdpicturePDF.ClosePath() == GdPictureStatus.OK) &&
(gdpicturePDF.ClipPathOdd() == GdPictureStatus.OK) &&
(gdpicturePDF.DrawRectangle(0, 400, 612, 800, true, false) == GdPictureStatus.OK))
{
status = gdpicturePDF.SaveToFile("test_ClipPathOdd.pdf");
if (status == GdPictureStatus.OK)
MessageBox.Show("The example has been followed successfully and the file has been saved.", caption);
else
MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + status.ToString(), caption);
}
else
MessageBox.Show("The example has not been followed successfully.\nThe last known status is " + gdpicturePDF.GetStat().ToString(), caption);
}
else
MessageBox.Show("The NewPDF() method has failed with the status: " + status.ToString(), caption);
gdpicturePDF.Dispose();
See Also