BmpBitmapDecoder Class

BmpBitmapDecoder Class

Defines a decoder for bitmap (BMP) encoded images. 

Namespace:  System.Windows.Media.Imaging
Assembly:  PresentationCore (in PresentationCore.dll)

'Declaration
Public NotInheritable Class BmpBitmapDecoder _
	Inherits BitmapDecoder
'Usage
Dim instance As BmpBitmapDecoder
You cannot directly create an instance of this class in XAML.

The following examples show how to decode and encode a bitmap (BMP) image using the specific BmpBitmapDecoder and BmpBitmapEncoder objects. For the complete sample, see BMP Encoder and Decoder Sample.

This example demonstrates how to decode a BMP image using a BmpBitmapDecoder from a Uri.

' Open a Uri and decode a BMP image 
Dim myUri As New Uri("tulipfarm.bmp", UriKind.RelativeOrAbsolute)
Dim decoder2 As New BmpBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource2 As BitmapSource = decoder2.Frames(0)

' Draw the Image 
Dim myImage2 As New Image()
myImage2.Source = bitmapSource2
myImage2.Stretch = Stretch.None
myImage2.Margin = New Thickness(20)

This example demonstrates how to encode a BitmapSource into a BMP image using a BmpBitmapEncoder.

Dim width As Integer = 128
Dim height As Integer = width
Dim stride As Integer = CType(width / 8, Integer)
Dim pixels(height * stride) As Byte

' Try creating a new image with a custom palette. 
Dim colors As New List(Of System.Windows.Media.Color)()
colors.Add(System.Windows.Media.Colors.Red)
colors.Add(System.Windows.Media.Colors.Blue)
colors.Add(System.Windows.Media.Colors.Green)
Dim myPalette As New BitmapPalette(Colors)

' Creates a new empty image with the pre-defined palette 
Dim image As BitmapSource = System.Windows.Media.Imaging.BitmapSource.Create(width, height, 96, 96, PixelFormats.Indexed1, myPalette, pixels, stride)
Dim stream As New FileStream("new.bmp", FileMode.Create)
Dim encoder As New BmpBitmapEncoder()
Dim myTextBlock As New TextBlock()
myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString()
encoder.Frames.Add(BitmapFrame.Create(image))
encoder.Save(stream)

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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