ColorMatrix : ColorMatrix « 2D Graphics « VB.Net Tutorial






  1. VB.Net Tutorial
  2. 2D Graphics
  3. ColorMatrix
ColorMatrix
Imports System.Drawing.Imaging
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class SetColorMatrix
   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 rect As New Rectangle(20, 20, 200, 100)
        Dim bitmap As New Bitmap("yourfile.jpg")

        Dim ptsArray As Single()() = {New Single() {1, 0, 0, 0, 0}, New Single() {0, 1, 0, 0, 0}, New Single() {0, 0, 1, 0, 0}, New Single() {0, 0, 0, 0.5F, 0}, New Single() {0, 0, 0, 0, 1}}

        Dim clrMatrix As New ColorMatrix(ptsArray)

        clrMatrix.Matrix34 = 0.8F
        clrMatrix.Matrix11 = 0.3F

        Dim imgAttributes As New ImageAttributes

        imgAttributes.SetColorMatrix(clrMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
        g.FillRectangle(Brushes.Red, rect)
        rect.Y += 120
        g.FillEllipse(Brushes.Black, rect)

        g.DrawImage(bitmap, New Rectangle(0, 0, bitmap.Width, bitmap.Height), 0, 0, bitmap.Width, bitmap.Height, GraphicsUnit.Pixel, imgAttributes)

        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








17.27.ColorMatrix
17.27.1.ColorMatrixColorMatrix