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PixelFormats Class
Visual Studio 2008
Represents the collection of supported pixel formats.
Assembly: PresentationCore (in PresentationCore.dll)
This example shows how to convert an image to grayscale using FormatConvertedBitmap.
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Page.Resources> <!-- This resource defines a BitmapImage with a source and a DecodePixelWidth of 200. This property is set to the same value as the desired width of the image to save on memory use. This BitmapImage is used as the base for the other BitmapSource resources. --> <BitmapImage x:Key="masterImage" DecodePixelWidth="200" UriSource="C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures\Forest.jpg"/> <!-- This FormatConvertedBitmap uses the BitmapImage defined above and changes the format to Gray32Float (grayscale). --> <FormatConvertedBitmap x:Key="convertFormatImage" Source="{StaticResource masterImage}" DestinationFormat="Gray32Float" /> </Page.Resources> <StackPanel> <!-- Apply the "convertFormatImage" resource defined above to this image. --> <Image Width="200" Source="{StaticResource convertFormatImage}" /> </StackPanel> </Page>
Imports System Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Media Imports System.Windows.Media.Imaging Namespace SDKSample Class FormatConvertedBitmapExample Inherits Page Public Sub New() '/// Create a BitmapImage and set it's DecodePixelWidth to 200. Use ///// '/// this BitmapImage as a source for other BitmapSource objects. ///// Dim myBitmapImage As New BitmapImage() ' BitmapSource objects like BitmapImage can only have their properties ' changed within a BeginInit/EndInit block. myBitmapImage.BeginInit() myBitmapImage.UriSource = New Uri("sampleImages/WaterLilies.jpg", UriKind.Relative) ' To save significant application memory, set the DecodePixelWidth or ' DecodePixelHeight of the BitmapImage value of the image source to the desired ' height or width of the rendered image. If you don't do this, the application will ' cache the image as though it were rendered as its normal size rather then just ' the size that is displayed. ' Note: In order to preserve aspect ratio, set DecodePixelWidth ' or DecodePixelHeight but not both. myBitmapImage.DecodePixelWidth = 200 myBitmapImage.EndInit() '//////// Convert the BitmapSource to a new format //////////// ' Use the BitmapImage created above as the source for a new BitmapSource object ' which is set to a gray scale format using the FormatConvertedBitmap BitmapSource. ' Note: New BitmapSource does not cache. It is always pulled when required. Dim newFormatedBitmapSource As New FormatConvertedBitmap() ' BitmapSource objects like FormatConvertedBitmap can only have their properties ' changed within a BeginInit/EndInit block. newFormatedBitmapSource.BeginInit() ' Use the BitmapSource object defined above as the source for this new ' BitmapSource (chain the BitmapSource objects together). newFormatedBitmapSource.Source = myBitmapImage ' Set the new format to Gray32Float (grayscale). newFormatedBitmapSource.DestinationFormat = PixelFormats.Gray32Float newFormatedBitmapSource.EndInit() ' Create Image Element Dim myImage As New Image() myImage.Width = 200 'set image source myImage.Source = newFormatedBitmapSource ' Add Image to the UI Dim myStackPanel As New StackPanel() myStackPanel.Children.Add(myImage) Me.Content = myStackPanel End Sub 'New End Class 'FormatConvertedBitmapExample End Namespace 'ImagingSnippetGallery
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.
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