VB.NET ImageAttributes.SetRemapTable方法代码示例

Public Sub SetRemapTableExample(ByVal e As PaintEventArgs)

    ' Create a filled, red image and save it to Circle2.jpg.
    Dim myBitmap As New Bitmap(50, 50)
    Dim g As Graphics = Graphics.FromImage(myBitmap)
    g.Clear(Color.White)
    g.FillEllipse(New SolidBrush(Color.Red), New Rectangle(0, 0, _
    50, 50))
    myBitmap.Save("Circle2.jpg")

    ' Create an Image object from the Circle2.jpg file, and draw

    ' it to the screen.
    Dim myImage As Image = Image.FromFile("Circle2.jpg")
    e.Graphics.DrawImage(myImage, 20, 20)

    ' Create a color map.
    Dim myColorMap(0) As ColorMap
    myColorMap(0) = New ColorMap
    myColorMap(0).OldColor = Color.Red
    myColorMap(0).NewColor = Color.Green

    ' Create an ImageAttributes object, and then pass the

    ' myColorMap object to the SetRemapTable method.
    Dim imageAttr As New ImageAttributes
    imageAttr.SetRemapTable(myColorMap)

    ' Draw the image with the remap table set.
    Dim rect As New Rectangle(150, 20, 50, 50)
    e.Graphics.DrawImage(myImage, rect, 0, 0, 50, 50, _
    GraphicsUnit.Pixel, imageAttr)
    ' Image
End Sub

' 导入命名空间
Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging

Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New RecoloringForm()
        Application.Run(myform)
    End Sub
End Class

Public Class RecoloringForm
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call
        Me.SetStyle(ControlStyles.ResizeRedraw, True)
        Me.SetStyle(ControlStyles.DoubleBuffer, True)
        Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents groupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents panel2 As System.Windows.Forms.Panel
    Friend WithEvents splitter1 As System.Windows.Forms.Splitter
    Friend WithEvents groupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents panel1 As System.Windows.Forms.Panel
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.groupBox2 = New System.Windows.Forms.GroupBox()
        Me.panel2 = New System.Windows.Forms.Panel()
        Me.splitter1 = New System.Windows.Forms.Splitter()
        Me.groupBox1 = New System.Windows.Forms.GroupBox()
        Me.panel1 = New System.Windows.Forms.Panel()
        Me.groupBox2.SuspendLayout()
        Me.groupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'groupBox2
        '
        Me.groupBox2.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel2})
        Me.groupBox2.Dock = System.Windows.Forms.DockStyle.Fill
        Me.groupBox2.Location = New System.Drawing.Point(187, 0)
        Me.groupBox2.Name = "groupBox2"
        Me.groupBox2.Size = New System.Drawing.Size(205, 182)
        Me.groupBox2.TabIndex = 5
        Me.groupBox2.TabStop = False
        Me.groupBox2.Text = "Mapped Colors"
        '
        'panel2
        '
        Me.panel2.BackColor = System.Drawing.Color.White
        Me.panel2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.panel2.Dock = System.Windows.Forms.DockStyle.Fill
        Me.panel2.Location = New System.Drawing.Point(3, 16)
        Me.panel2.Name = "panel2"
        Me.panel2.Size = New System.Drawing.Size(199, 163)
        Me.panel2.TabIndex = 0
        '
        'splitter1
        '
        Me.splitter1.Location = New System.Drawing.Point(184, 0)
        Me.splitter1.Name = "splitter1"
        Me.splitter1.Size = New System.Drawing.Size(3, 182)
        Me.splitter1.TabIndex = 4
        Me.splitter1.TabStop = False
        '
        'groupBox1
        '
        Me.groupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel1})
        Me.groupBox1.Dock = System.Windows.Forms.DockStyle.Left
        Me.groupBox1.Name = "groupBox1"
        Me.groupBox1.Size = New System.Drawing.Size(184, 182)
        Me.groupBox1.TabIndex = 3
        Me.groupBox1.TabStop = False
        Me.groupBox1.Text = "Original Colors"
        '
        'panel1
        '
        Me.panel1.BackColor = System.Drawing.Color.White
        Me.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.panel1.Location = New System.Drawing.Point(3, 16)
        Me.panel1.Name = "panel1"
        Me.panel1.Size = New System.Drawing.Size(178, 163)
        Me.panel1.TabIndex = 0
        '
        'RecoloringForm
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(392, 182)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.groupBox2, Me.splitter1, Me.groupBox1})
        Me.Name = "RecoloringForm"
        Me.Text = "RecoloringForm"
        Me.groupBox2.ResumeLayout(False)
        Me.groupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub panel1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel1.Paint
        Dim g As Graphics = e.Graphics
        Dim bmp As Bitmap = New Bitmap("figure2.BMP")
        Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)
        rect.Offset((Me.panel1.ClientRectangle.Width - rect.Width) / 2, (Me.panel1.ClientRectangle.Height - rect.Height) / 2)
        g.DrawImage(bmp, rect)
    End Sub

    Private Sub panel2_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel2.Paint
        Dim g As Graphics = e.Graphics
        Dim bmp As Bitmap = New Bitmap("figure2.BMP")
        Dim colorMap As ColorMap() = New ColorMap() {New ColorMap()}
        colorMap(0).OldColor = bmp.GetPixel(0, bmp.Height - 1)
        colorMap(0).NewColor = Color.White
        Dim attr As ImageAttributes = New ImageAttributes()
        attr.SetRemapTable(colorMap)

        Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)
        rect.Offset((Me.panel2.ClientRectangle.Width - rect.Width) / 2, (Me.panel2.ClientRectangle.Height - rect.Height) / 2)
        g.DrawImage(bmp, rect, 0, 0, rect.Width, rect.Height, g.PageUnit, attr)

    End Sub
End Class