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本文整理彙總了VB.NET中System.Drawing.Imaging.BitmapData類的典型用法代碼示例。如果您正苦於以下問題：VB.NET BitmapData類的具體用法？VB.NET BitmapData怎麼用？VB.NET BitmapData使用的例子？那麼恭喜您, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了BitmapData類的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於我們的係統推薦出更棒的VB.NET代碼示例。
示例1: LockUnlockBitsExample
點讚 13
Private Sub LockUnlockBitsExample(ByVal e As PaintEventArgs) ' Create a new bitmap.
Dim bmp As New Bitmap("c:\fakePhoto.jpg") ' Lock the bitmap's bits.
Dim rect As New Rectangle(0, 0, bmp.Width, bmp.Height) Dim bmpData As System.Drawing.Imaging.BitmapData = bmp.LockBits(rect, _
Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat) ' Get the address of the first line.
Dim ptr As IntPtr = bmpData.Scan0 ' Declare an array to hold the bytes of the bitmap.
' This code is specific to a bitmap with 24 bits per pixels.
Dim bytes As Integer = Math.Abs(bmpData.Stride) * bmp.Height Dim rgbValues(bytes - 1) As Byte
' Copy the RGB values into the array.
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes) ' Set every third value to 255. A 24bpp image will look red.
For counter As Integer = 2 To rgbValues.Length - 1 Step 3
rgbValues(counter) = 255
Next
' Copy the RGB values back to the bitmap
System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, bytes) ' Unlock the bits.
bmp.UnlockBits(bmpData) ' Draw the modified image.
e.Graphics.DrawImage(bmp, 0, 150)End Sub
