Use Drawing Transformations for PDF - VB.NET
PDF SDK sample in VB.NET demonstrating ‘Use Drawing Transformations for PDF’
Program.vb
Imports Bytescout.PDF
''' <summary>
''' This example demonstrates how to use coordinate space transformations.
''' </summary>
Class Program
Shared Sub Main()
' Create new document
Dim pdfDocument = New Document()
pdfDocument.RegistrationName = "demo"
pdfDocument.RegistrationKey = "demo"
' If you wish to load an existing document uncomment the line below And comment the Add page section instead
' pdfDocument.Load(".\existing_document.pdf")
' Add page
Dim page = New Page(PaperFormat.A4)
pdfDocument.Pages.Add(page)
Dim canvas = page.Canvas
' Prepare pens
Dim blackPen = New SolidPen(New ColorRGB(0, 0, 0), 2.0F)
blackPen.Opacity = 50
Dim bluePen = New SolidPen(New ColorRGB(0, 0, 255), 2.0F)
bluePen.Opacity = 50
Dim greenPen = New SolidPen(New ColorRGB(0, 255, 0), 2.0F)
greenPen.Opacity = 50
' Move coordinate space zero point to (200, 200) and draw a rectangle of 50x50 dize
canvas.TranslateTransform(200, 200)
canvas.DrawRectangle(blackPen, 0, 0, 50, 50)
' Now zoom the coordinate space in twice and draw the same rectangle in green
canvas.ScaleTransform(2, 2)
canvas.DrawRectangle(greenPen, 0, 0, 50, 50)
' Now rotate the coordinate space by 30 degrees and draw the same rectangle in blue
canvas.RotateTransform(30)
canvas.DrawRectangle(bluePen, 0, 0, 50, 50)
' Save document to file
pdfDocument.Save("result.pdf")
' Cleanup
pdfDocument.Dispose()
' Open document in default PDF viewer app
Process.Start("result.pdf")
End Sub
End Class
Resources.Designer.vb
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