Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class InterpolationModeDemo
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim bm As New Bitmap("yourfile.jpg")
e.Graphics.DrawImage(bm, 10, 10)
Dim x As Integer = 10
Dim y As Integer = 120
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.Default, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.Low, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.High, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.Bilinear, x, y)
x = 10
y += 100
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.Bicubic, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.NearestNeighbor, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.HighQualityBilinear, x, y)
DrawSample(e.Graphics, bm, Drawing2D.InterpolationMode.HighQualityBicubic, x, y)
End Sub
Private Sub DrawSample(ByVal gr As Graphics, ByVal bm As Bitmap, ByVal interpolation_mode As Drawing2D.InterpolationMode, ByRef x As Integer, ByVal y As Integer)
gr.DrawString(interpolation_mode.ToString, Me.Font, Brushes.Black, x, y)
gr.InterpolationMode = interpolation_mode
gr.DrawImage(bm, x, y + 20, 50, 50)
gr.InterpolationMode = interpolation_mode
Dim src_rect As New Rectangle(35, 35, 30, 30)
Dim dest_rect As New Rectangle(x + 60, y + 20, 50, 50)
gr.DrawImage(bm, dest_rect, src_rect, GraphicsUnit.Pixel)
gr.DrawRectangle(Pens.Black, dest_rect)
x += 120
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End Class
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