WriteableBitmap Class
Definition
Important
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Provides a BitmapSource that can be written to and updated.
public ref class WriteableBitmap sealed : BitmapSource
/// [Windows.Foundation.Metadata.Activatable(Windows.UI.Xaml.Media.Imaging.IWriteableBitmapFactory, 65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class WriteableBitmap final : BitmapSource
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(Windows.UI.Xaml.Media.Imaging.IWriteableBitmapFactory, 65536, "Windows.Foundation.UniversalApiContract")]
class WriteableBitmap final : BitmapSource
[Windows.Foundation.Metadata.Activatable(typeof(Windows.UI.Xaml.Media.Imaging.IWriteableBitmapFactory), 65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class WriteableBitmap : BitmapSource
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(typeof(Windows.UI.Xaml.Media.Imaging.IWriteableBitmapFactory), 65536, "Windows.Foundation.UniversalApiContract")]
public sealed class WriteableBitmap : BitmapSource
Public NotInheritable Class WriteableBitmap
Inherits BitmapSource
- Inheritance
- Attributes
Windows requirements
Device family |
Windows 10 (introduced in 10.0.10240.0)
|
API contract |
Windows.Foundation.UniversalApiContract (introduced in v1.0)
|
Examples
For code examples in C#, C++/WinRT, and C++/CX, see WriteableBitmap.PixelBuffer.
Remarks
The image source data of a WriteableBitmap is an underlying pixel buffer.
The IBuffer returned by WriteableBitmap.PixelBuffer can't be written to directly. But you can use language-specific techniques to write to the underlying pixel content in the buffer. For details, see the Remarks section of WriteableBitmap.PixelBuffer.
Some of the scenarios where you might have used a WriteableBitmap class in previous XAML frameworks can be accomplished in the Windows Runtime by using the RenderTargetBitmap class instead. For more info see RenderTargetBitmap.
Constructors
WriteableBitmap(Int32, Int32) |
Initializes a new instance of the WriteableBitmap class. |
Properties
Dispatcher |
Gets the CoreDispatcher that this object is associated with. The CoreDispatcher represents a facility that can access the DependencyObject on the UI thread even if the code is initiated by a non-UI thread. (Inherited from DependencyObject) |
PixelBuffer |
Gets an access for the direct buffer where each pixel of the WriteableBitmap is written to. |
PixelHeight |
Gets the height of the bitmap in pixels. (Inherited from BitmapSource) |
PixelWidth |
Gets the width of the bitmap in pixels. (Inherited from BitmapSource) |
Methods
ClearValue(DependencyProperty) |
Clears the local value of a dependency property. (Inherited from DependencyObject) |
GetAnimationBaseValue(DependencyProperty) |
Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject) |
GetValue(DependencyProperty) |
Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject) |
Invalidate() |
Requests a draw or redraw of the entire bitmap. |
ReadLocalValue(DependencyProperty) |
Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject) |
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback) |
Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance. (Inherited from DependencyObject) |
SetSource(IRandomAccessStream) |
Sets the source image for a BitmapSource by accessing a stream. Most callers should use SetSourceAsync instead. (Inherited from BitmapSource) |
SetSourceAsync(IRandomAccessStream) |
Sets the source image for a BitmapSource by accessing a stream and processing the result asynchronously. (Inherited from BitmapSource) |
SetValue(DependencyProperty, Object) |
Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject) |
UnregisterPropertyChangedCallback(DependencyProperty, Int64) |
Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback. (Inherited from DependencyObject) |