VB.Net Tutorial/2D Graphics/TextureBrush

Create TextureBrush from Bitmap

Imports System
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
public class TextureBrushCreateFromBitmap
   public Shared Sub Main
        Application.Run(New BrushesForm)
   End Sub
End class
Public Class BrushesForm
    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
    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.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        "
        "BrushesForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Name = "BrushesForm"
        Me.Text = "Form1"
    End Sub
#End Region

    Enum LinearGradientMode
        BackwardDiagonal
        ForwardDiagonal
        Horizontal
        Vertical
    End Enum
    Private Sub BrushesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim width As Integer = Me.ClientRectangle.Width
        Dim height As Integer = Me.ClientRectangle.Height / 5
        Dim whiteBrush As Brush = System.Drawing.Brushes.White
        Dim blackBrush As Brush = System.Drawing.Brushes.Black
        Dim b As Brush
        Dim file As String = "YourFile.jpg"
        b = New TextureBrush(New Bitmap(file))
        g.FillRectangle(b, 0, 0, width, height)
        g.DrawString(b.ToString(), Me.Font, whiteBrush, 0, 0)
    End Sub
End Class

Create textured brush and display textured rectangle

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TexturePaintDemo
   public Shared Sub Main
        Application.Run(New FrmDrawShapes)
   End Sub
End class
Public Class FrmDrawShapes
   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
   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.Container
   "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.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      "
      "frmDrawShapes
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(520, 197)
      Me.Name = "frmDrawShapes"
      Me.Text = "Drawing Shapes"
   End Sub
#End Region
   Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
      Dim graphicsObject As Graphics = e.Graphics

      Dim textureBitmap As Bitmap = New Bitmap(10, 10)
      Dim graphicsObject2 As Graphics = Graphics.FromImage(textureBitmap) " get bitmap graphics
      " brush and pen used throughout program
      Dim solidColorBrush As SolidBrush = New SolidBrush(Color.Red)
      Dim coloredPen As Pen = New Pen(solidColorBrush)

      solidColorBrush.Color = Color.Yellow
      graphicsObject2.FillRectangle(solidColorBrush, 0, 0, 10, 10)
      coloredPen.Color = Color.Black
      graphicsObject2.DrawRectangle(coloredPen, 1, 1, 6, 6)
      solidColorBrush.Color = Color.Blue
      graphicsObject2.FillRectangle(solidColorBrush, 1, 1, 3, 3)
      solidColorBrush.Color = Color.Red
      graphicsObject2.FillRectangle(solidColorBrush, 4, 4, 3, 3)
      
      Dim texturedBrush As TextureBrush = _
         New TextureBrush(textureBitmap)
      graphicsObject.FillRectangle(texturedBrush, 155, 30, 75, 100)
   End Sub 
End Class

Generate points to draw a star shape

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Math
public class DrawAStarShape
   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 cx As Integer = Me.ClientSize.Width \ 2
        Dim cy As Integer = Me.ClientSize.Height \ 2
        Dim r1 As Integer = Min(cx, cy) - 10
        Dim r2 As Integer = Min(cx, cy) \ 2
        Dim pts(9) As Point
        For i As Integer = 0 To 9 Step 2
            pts(i).X = cx + CInt(r1 * Cos(i * PI / 5 - PI / 2))
            pts(i).Y = cy + CInt(r1 * Sin(i * PI / 5 - PI / 2))
            pts(i + 1).X = cx + CInt(r2 * Cos((i + 1) * PI / 5 - PI / 2))
            pts(i + 1).Y = cy + CInt(r2 * Sin((i + 1) * PI / 5 - PI / 2))
        Next i
        Dim texture_brush As New TextureBrush(new Bitmap("yourfile.jpg"))
        e.Graphics.FillPolygon(texture_brush, pts)
        e.Graphics.DrawPolygon(Pens.Black, pts)
  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

Transform and Rotate the TextureBrush

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Math
public class TextureBrushTransformAndRotate
   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 cx As Integer = Me.ClientSize.Width \ 2
        Dim cy As Integer = Me.ClientSize.Height \ 2
        Dim r1 As Integer = Min(cx, cy) - 10
        Dim r2 As Integer = Min(cx, cy) \ 2
        Dim pts(9) As Point
        For i As Integer = 0 To 9 Step 2
            pts(i).X = cx + CInt(r1 * Cos(i * PI / 5 - PI / 2))
            pts(i).Y = cy + CInt(r1 * Sin(i * PI / 5 - PI / 2))
            pts(i + 1).X = cx + CInt(r2 * Cos((i + 1) * PI / 5 - PI / 2))
            pts(i + 1).Y = cy + CInt(r2 * Sin((i + 1) * PI / 5 - PI / 2))
        Next i
        Dim texture_brush As New TextureBrush(new Bitmap("yourfile.jpg"))
        texture_brush.ScaleTransform(20, 10, MatrixOrder.Append)
        texture_brush.RotateTransform(30, MatrixOrder.Append)
        e.Graphics.FillPolygon(texture_brush, pts)
        e.Graphics.DrawPolygon(Pens.Black, pts)
  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

Transform TextureBrush

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TransformTextureBrush
   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)
        " Create a TextureBrush object
        Dim txtrBrush As New TextureBrush(New Bitmap("yourfile.jpg"))
        " Create a transformation matrix.
        Dim M As New Matrix
        " Rotate the texture image by 90 degrees.
        txtrBrush.RotateTransform(90, MatrixOrder.Prepend)
        " Translate
        M.Translate(50, 0)
        " Multiply the transformation matrix
        " of tBrush by translateMatrix.
        txtrBrush.MultiplyTransform(M)
        " Scale operation
        txtrBrush.ScaleTransform(2, 1, MatrixOrder.Prepend)
        " Fill a rectangle with texture brush
        g.FillRectangle(txtrBrush, 240, 0, 200, 200)
        " Reset transformation
        txtrBrush.ResetTransform()
        " Fill rectangle after reseting transformation
        g.FillRectangle(txtrBrush, 0, 0, 200, 200)
        " Dispose
        txtrBrush.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