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BitmapSource (Clase)

Represents a single, constant set of pixels at a certain size and resolution. This is an abstract class.

Espacio de nombres: System.Windows.Media.Imaging
Ensamblado: PresentationCore (en presentationcore.dll)
Espacio de nombres XML:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

[LocalizabilityAttribute(LocalizationCategory.None, Readability=Readability.Unreadable)] 
public abstract class BitmapSource : ImageSource
/** @attribute LocalizabilityAttribute(LocalizationCategory.None, Readability=Readability.Unreadable) */ 
public abstract class BitmapSource extends ImageSource
LocalizabilityAttribute(LocalizationCategory.None, Readability=Readability.Unreadable) 
public abstract class BitmapSource extends ImageSource
Esta clase es abstracta; vea en Jerarquía de herencia las clases derivadas no abstractas utilizables en XAML.

BitmapSource is the basic building block of the Windows Presentation Foundation (WPF) imaging pipeline, conceptually representing a single, constant set of pixels at a certain size and resolution. A BitmapSource could be a single frame in an image file that a decoder provides, or it could be the result of a transform that operates on a BitmapSource of its own. BitmapSource is not used to represent a multi-frame image or an animation.

Windows Presentation Foundation (WPF) natively supports compression and decompression of bitmap (BMP), Graphics Interchange Format (GIF), Joint Photographics Experts Group (JPEG), Portable Network Graphics (PNG), and Tagged Image File Format (TIFF) images.

For bitmap decoding scenarios, BitmapSource uses automatic codec discovery, based on the installed codecs on the user's system.

The maximum height and width of an image is 2^16 pixels at 32 bits per channel * 4 channels. The maximum size of a BitmapSource is 2^32 bytes (64 gigabytes) and the maximum image size is four gigapixels. The minimum image size is 1x1.

The following code example demonstrates how to create a BitmapSource and use it as the source of an Image control.

// Define parameters used to create the BitmapSource.
PixelFormat pf = PixelFormats.Bgr32;
int width = 200;
int height = 200;
int rawStride = (width * pf.BitsPerPixel + 7) / 8;
byte[] rawImage = new byte[rawStride * height];

// Initialize the image with data.
Random value = new Random();
value.NextBytes(rawImage);

// Create a BitmapSource.
BitmapSource bitmap = BitmapSource.Create(width, height,
    96, 96, pf, null,
    rawImage, rawStride);

// Create an image element;
Image myImage = new Image();
myImage.Width = 200;
// Set image source.
myImage.Source = bitmap;

The following code example uses a BitmapSource derived class, BitmapImage, to create a bitmap from an image file and use it as the source of an Image control.

// Create the image element.
Image simpleImage = new Image();    
simpleImage.Width = 200;
simpleImage.Margin = new Thickness(5);

// Create source.
BitmapImage bi = new BitmapImage();
// BitmapImage.UriSource must be in a BeginInit/EndInit block.
bi.BeginInit();
bi.UriSource = new Uri(@"/sampleImages/cherries_larger.jpg",UriKind.RelativeOrAbsolute);
bi.EndInit();
// Set the image source.
simpleImage.Source = bi;

System.Object
   System.Windows.Threading.DispatcherObject
     System.Windows.DependencyObject
       System.Windows.Freezable
         System.Windows.Media.Animation.Animatable
           System.Windows.Media.ImageSource
            System.Windows.Media.Imaging.BitmapSource
               Clases derivadas

Los miembros estáticos públicos (Shared en Visual Basic) de este tipo son seguros para la ejecución de subprocesos. No se garantiza que los miembros de instancias sean seguros para la ejecución de subprocesos.

Microsoft .NET Framework 3.0 es compatible con Windows Vista, Microsoft Windows XP SP2 y Windows Server 2003 SP1.

.NET Framework

Compatible con: 3.0
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