VB.Net/2D/Bmp
Save an Image to Bmp File
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Collections.Generic Imports System.ruponentModel Imports System.Drawing.Imaging Imports System.Drawing Public Class MainClass
Shared Sub Main()
Dim bm As New Bitmap(256, 256)
" Draw on it.
Dim gr As Graphics = Graphics.FromImage(bm)
gr.Clear(Color.White)
gr.DrawEllipse(Pens.Red, 0, 0, bm.Width - 1, bm.Height - 1)
gr.DrawLine(Pens.Green, 0, 0, bm.Width - 1, bm.Height - 1)
gr.DrawLine(Pens.Blue, bm.Width - 1, 0, 0, bm.Height - 1)
" Save the result as a JPEG file.
bm.Save("test.Bmp", ImageFormat.Bmp)
End Sub
End Class
</source>
Set BMP file to Transparent
<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel 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 TransparencyForm()
Application.Run(myform)
End Sub
End Class Public Class TransparencyForm
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.ruponentModel.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 splitter2 As System.Windows.Forms.Splitter
Friend WithEvents splitter1 As System.Windows.Forms.Splitter
Friend WithEvents groupBox1 As System.Windows.Forms.GroupBox
Friend WithEvents panel1 As System.Windows.Forms.Panel
Friend WithEvents groupBox3 As System.Windows.Forms.GroupBox
Friend WithEvents panel3 As System.Windows.Forms.Panel
Friend WithEvents groupBox2 As System.Windows.Forms.GroupBox
Friend WithEvents panel2 As System.Windows.Forms.Panel
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.splitter2 = New System.Windows.Forms.Splitter()
Me.splitter1 = New System.Windows.Forms.Splitter()
Me.groupBox1 = New System.Windows.Forms.GroupBox()
Me.panel1 = New System.Windows.Forms.Panel()
Me.groupBox3 = New System.Windows.Forms.GroupBox()
Me.panel3 = New System.Windows.Forms.Panel()
Me.groupBox2 = New System.Windows.Forms.GroupBox()
Me.panel2 = New System.Windows.Forms.Panel()
Me.groupBox1.SuspendLayout()
Me.groupBox3.SuspendLayout()
Me.groupBox2.SuspendLayout()
Me.SuspendLayout()
"
"splitter2
"
Me.splitter2.Location = New System.Drawing.Point(232, 0)
Me.splitter2.Name = "splitter2"
Me.splitter2.Size = New System.Drawing.Size(3, 102)
Me.splitter2.TabIndex = 9
Me.splitter2.TabStop = False
"
"splitter1
"
Me.splitter1.Location = New System.Drawing.Point(229, 0)
Me.splitter1.Name = "splitter1"
Me.splitter1.Size = New System.Drawing.Size(3, 102)
Me.splitter1.TabIndex = 6
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.Location = New System.Drawing.Point(117, 0)
Me.groupBox1.Name = "groupBox1"
Me.groupBox1.Size = New System.Drawing.Size(112, 102)
Me.groupBox1.TabIndex = 5
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(106, 83)
Me.panel1.TabIndex = 0
"
"groupBox3
"
Me.groupBox3.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel3})
Me.groupBox3.Dock = System.Windows.Forms.DockStyle.Fill
Me.groupBox3.Location = New System.Drawing.Point(117, 0)
Me.groupBox3.Name = "groupBox3"
Me.groupBox3.Size = New System.Drawing.Size(235, 102)
Me.groupBox3.TabIndex = 8
Me.groupBox3.TabStop = False
Me.groupBox3.Text = "Made Transparent"
"
"panel3
"
Me.panel3.BackColor = System.Drawing.Color.White
Me.panel3.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.panel3.Dock = System.Windows.Forms.DockStyle.Fill
Me.panel3.Location = New System.Drawing.Point(3, 16)
Me.panel3.Name = "panel3"
Me.panel3.Size = New System.Drawing.Size(229, 83)
Me.panel3.TabIndex = 0
"
"groupBox2
"
Me.groupBox2.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel2})
Me.groupBox2.Dock = System.Windows.Forms.DockStyle.Left
Me.groupBox2.Name = "groupBox2"
Me.groupBox2.Size = New System.Drawing.Size(117, 102)
Me.groupBox2.TabIndex = 7
Me.groupBox2.TabStop = False
Me.groupBox2.Text = "White Background"
"
"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(111, 83)
Me.panel2.TabIndex = 0
"
"TransparencyForm
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(352, 102)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.splitter2, Me.splitter1, Me.groupBox1, Me.groupBox3, Me.groupBox2})
Me.Name = "TransparencyForm"
Me.Text = "TransparencyForm"
Me.groupBox1.ResumeLayout(False)
Me.groupBox3.ResumeLayout(False)
Me.groupBox2.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
- End Region
Dim backgroundString As String = "a\n b\n c\n d\n e\n f\n g\n H \n"
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")
g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
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")
g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
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.panel1.ClientRectangle.Width - rect.Width) / 2, (Me.panel1.ClientRectangle.Height - rect.Height) / 2)
g.DrawImage(bmp, rect)
End Sub
Private Sub panel3_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel3.Paint
Dim g As Graphics = e.Graphics
Dim bmp As Bitmap = New Bitmap("figure2.BMP")
g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
bmp.MakeTransparent(bmp.GetPixel(0, bmp.Height - 1))
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 TransparencyForm_Layout(ByVal sender As Object, ByVal e As LayoutEventArgs) Handles MyBase.Layout
panel1.Refresh()
panel2.Refresh()
panel3.Refresh()
End Sub
End Class
</source>
