VB.Net/2D/Wmf

Материал из VB Эксперт
Версия от 15:42, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Create wmf file and draw to it

<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()
       Const WID As Integer = 200
       Dim file_name As String = "test.wmf"
       
       Dim gr As Graphics
       gr = Graphics.FromImage(new Bitmap(100,100))
       " Make a Graphics object so we can use its hDC as a reference.
       Dim hdc As IntPtr = gr.GetHdc
       " Make the Metafile, using the reference hDC.
       Dim bounds As New RectangleF(0, 0, WID, WID)
       Dim mf As New Metafile(file_name, hdc, _
           bounds, MetafileFrameUnit.Pixel)
       gr.ReleaseHdc(hdc)
       " Make a Graphics object and draw.
       gr = Graphics.FromImage(mf)
       gr.PageUnit = GraphicsUnit.Pixel
       gr.Clear(Color.White)
       gr.DrawEllipse(Pens.Red, bounds)
       gr.DrawLine(Pens.Blue, 0, 0, WID, WID)
       gr.DrawLine(Pens.Blue, WID, 0, 0, WID)
       " Close the metafile and free resources.
       gr.Dispose()
       mf.Dispose()
  End Sub 

End Class


      </source>


Read from wmf file and display it on a form

<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 form1 As Form1 =  new Form1()
      Application.Run(form1)
  End Sub 

End Class Public Class Form1

   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       Const WID As Integer = 200
       Dim file_name As String = "test.wmf"
       
       " Reload the metafile and copy it into a Bitmap.
       Dim mf As Metafile = New Metafile(file_name)
       Dim bm As New Bitmap(WID, WID)
       Dim gr As Graphics = Graphics.FromImage(bm)
       Dim dest_bounds As New RectangleF(0, 0, WID, WID)
       Dim source_bounds As New RectangleF(0, 0, WID + 1, WID + 1)
       gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel)
       
       picOrig.SizeMode = PictureBoxSizeMode.AutoSize
       picOrig.Image = bm
       gr.Dispose()
       mf.Dispose()
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing AndAlso components IsNot Nothing Then
           components.Dispose()
       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()
       Me.picSmall = New System.Windows.Forms.PictureBox
       Me.picOrig = New System.Windows.Forms.PictureBox
       CType(Me.picSmall, System.ruponentModel.ISupportInitialize).BeginInit()
       CType(Me.picOrig, System.ruponentModel.ISupportInitialize).BeginInit()
       Me.SuspendLayout()
       "
       "picSmall
       "
       Me.picSmall.Location = New System.Drawing.Point(64, 8)
       Me.picSmall.Name = "picSmall"
       Me.picSmall.Size = New System.Drawing.Size(32, 24)
       Me.picSmall.TabIndex = 3
       Me.picSmall.TabStop = False
       "
       "picOrig
       "
       Me.picOrig.Location = New System.Drawing.Point(8, 8)
       Me.picOrig.Name = "picOrig"
       Me.picOrig.Size = New System.Drawing.Size(48, 56)
       Me.picOrig.TabIndex = 2
       Me.picOrig.TabStop = False
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(326, 215)
       Me.Controls.Add(Me.picSmall)
       Me.Controls.Add(Me.picOrig)
       Me.Name = "Form1"
       Me.Text = "MakeMetafile"
       CType(Me.picSmall, System.ruponentModel.ISupportInitialize).EndInit()
       CType(Me.picOrig, System.ruponentModel.ISupportInitialize).EndInit()
       Me.ResumeLayout(False)
   End Sub
   Friend WithEvents picSmall As System.Windows.Forms.PictureBox
   Friend WithEvents picOrig As System.Windows.Forms.PictureBox

End Class

      </source>


Save an Image to Wmf file format

<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.wmf", ImageFormat.Wmf)
  End Sub 

End Class


      </source>


Shrink a wmf Image

<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 form1 As Form1 =  new Form1()
      Application.Run(form1)
  End Sub 

End Class Public Class Form1

   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       Const WID As Integer = 200
       Dim file_name As String = "test.wmf"
       
       " Reload the metafile and copy it into a Bitmap.
       Dim mf As Metafile = New Metafile(file_name)
       Dim bm As New Bitmap(WID, WID)
       Dim gr As Graphics = Graphics.FromImage(bm)
       Dim dest_bounds As New RectangleF(0, 0, WID, WID)
       Dim source_bounds As New RectangleF(0, 0, WID + 1, WID + 1)
       gr.ScaleTransform(0.5, 0.5)
       gr.DrawImage(mf, bounds, source_bounds, GraphicsUnit.Pixel)
       
       picOrig.SizeMode = PictureBoxSizeMode.AutoSize
       picOrig.Image = bm
       gr.Dispose()
       mf.Dispose()
   End Sub

End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1

   Inherits System.Windows.Forms.Form
   "Form overrides dispose to clean up the component list.
   <System.Diagnostics.DebuggerNonUserCode()> _
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing AndAlso components IsNot Nothing Then
           components.Dispose()
       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()
       Me.picSmall = New System.Windows.Forms.PictureBox
       Me.picOrig = New System.Windows.Forms.PictureBox
       CType(Me.picSmall, System.ruponentModel.ISupportInitialize).BeginInit()
       CType(Me.picOrig, System.ruponentModel.ISupportInitialize).BeginInit()
       Me.SuspendLayout()
       "
       "picSmall
       "
       Me.picSmall.Location = New System.Drawing.Point(64, 8)
       Me.picSmall.Name = "picSmall"
       Me.picSmall.Size = New System.Drawing.Size(32, 24)
       Me.picSmall.TabIndex = 3
       Me.picSmall.TabStop = False
       "
       "picOrig
       "
       Me.picOrig.Location = New System.Drawing.Point(8, 8)
       Me.picOrig.Name = "picOrig"
       Me.picOrig.Size = New System.Drawing.Size(48, 56)
       Me.picOrig.TabIndex = 2
       Me.picOrig.TabStop = False
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(326, 215)
       Me.Controls.Add(Me.picSmall)
       Me.Controls.Add(Me.picOrig)
       Me.Name = "Form1"
       Me.Text = "MakeMetafile"
       CType(Me.picSmall, System.ruponentModel.ISupportInitialize).EndInit()
       CType(Me.picOrig, System.ruponentModel.ISupportInitialize).EndInit()
       Me.ResumeLayout(False)
   End Sub
   Friend WithEvents picSmall As System.Windows.Forms.PictureBox
   Friend WithEvents picOrig As System.Windows.Forms.PictureBox

End Class

      </source>