VB.Net Tutorial/2D Graphics/CompositingQuality

CompositingQuality.GammaCorrected

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class AlphaBCompGammaCorr
   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 g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim rect1 As New Rectangle(20, 20, 100, 100)
        Dim rect2 As New Rectangle(200, 20, 100, 100)
        Dim redBrush As New SolidBrush(Color.FromArgb(150, 255, 0, 0))
        Dim greenBrush As New SolidBrush(Color.FromArgb(180, 0, 255, 0))
        Dim tempBmp As New Bitmap(200, 150)
        Dim tempGraphics As Graphics = Graphics.FromImage(tempBmp)
        tempGraphics.rupositingMode = CompositingMode.SourceOver
        tempGraphics.rupositingQuality = CompositingQuality.GammaCorrected
        tempGraphics.FillRectangle(redBrush, rect1)
        rect1.X += 30
        rect1.Y += 30
        tempGraphics.FillEllipse(greenBrush, rect1)
        g.rupositingQuality = CompositingQuality.GammaCorrected
        g.DrawImage(tempBmp, 0, 0)
        g.FillRectangle(Brushes.Red, rect2)
        rect2.X += 30
        rect2.Y += 30
        g.FillEllipse(Brushes.Green, rect2)
        tempBmp.Dispose()
        g.Dispose()
  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

CompositingQuality.HighQuality

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class CompositingQualityHighQuality
   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 g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        g.SmoothingMode = SmoothingMode.AntiAlias
        g.rupositingQuality = CompositingQuality.HighQuality
        Dim path As New GraphicsPath
        path.AddEllipse(20, 20, 200, 200)
        Dim pthGrBrush As New PathGradientBrush(path)
        Dim transBlackColor As Color = color.FromArgb(90, 255, 255, 255)
        Dim color2() As Color = {Color.Black}
        pthGrBrush.SurroundColors = color2
        pthGrBrush.CenterColor = color.Red
        g.FillPath(pthGrBrush, path)
        g.Dispose()
  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

CompositingQuality.HighSpeed

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class CompositingQualityHighSpeed
   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 g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim redPen As New Pen(Color.Red, 20)
        Dim bluePen As New Pen(Color.Blue, 10)
        Dim gContainer1 As GraphicsContainer = g.BeginContainer()
        g.SmoothingMode = SmoothingMode.AntiAlias
        g.rupositingQuality = CompositingQuality.GammaCorrected
        g.DrawEllipse(redPen, 10, 10, 100, 50)
        g.DrawRectangle(bluePen, 210, 0, 100, 100)
        Dim gContainer2 As GraphicsContainer = g.BeginContainer()
        g.SmoothingMode = SmoothingMode.HighSpeed
        g.rupositingQuality = CompositingQuality.HighSpeed
        g.DrawEllipse(redPen, 10, 150, 100, 50)
        g.DrawRectangle(bluePen, 210, 150, 100, 100)
        g.EndContainer(gContainer2)
        g.EndContainer(gContainer1)
        redPen.Dispose()
        bluePen.Dispose()
        g.Dispose()
  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

Graphics CompositingMode.SourceOver

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class AlphaBCompGammaCorr
   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 g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)
        Dim rect1 As New Rectangle(20, 20, 100, 100)
        Dim rect2 As New Rectangle(200, 20, 100, 100)
        Dim redBrush As New SolidBrush(Color.FromArgb(150, 255, 0, 0))
        Dim greenBrush As New SolidBrush(Color.FromArgb(180, 0, 255, 0))
        Dim tempBmp As New Bitmap(200, 150)
        Dim tempGraphics As Graphics = Graphics.FromImage(tempBmp)
        tempGraphics.rupositingMode = CompositingMode.SourceOver
        tempGraphics.rupositingQuality = CompositingQuality.GammaCorrected
        tempGraphics.FillRectangle(redBrush, rect1)
        rect1.X += 30
        rect1.Y += 30
        tempGraphics.FillEllipse(greenBrush, rect1)
        g.rupositingQuality = CompositingQuality.GammaCorrected
        g.DrawImage(tempBmp, 0, 0)
        g.FillRectangle(Brushes.Red, rect2)
        rect2.X += 30
        rect2.Y += 30
        g.FillEllipse(Brushes.Green, rect2)
        tempBmp.Dispose()
        g.Dispose()
  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