FormatConvertedBitmap 类

定义

BitmapSource 提供像素格式转换功能。Provides pixel format conversion functionality for a BitmapSource.

public ref class FormatConvertedBitmap sealed : System::Windows::Media::Imaging::BitmapSource, System::ComponentModel::ISupportInitialize
public sealed class FormatConvertedBitmap : System.Windows.Media.Imaging.BitmapSource, System.ComponentModel.ISupportInitialize
type FormatConvertedBitmap = class
    inherit BitmapSource
    interface ISupportInitialize
Public NotInheritable Class FormatConvertedBitmap
Inherits BitmapSource
Implements ISupportInitialize
继承
实现

注解

FormatConvertedBitmapISupportInitialize实现接口, 以优化多个属性的初始化。FormatConvertedBitmap implements the ISupportInitialize interface to optimize initialization on multiple properties. 属性更改只能在对象初始化过程中发生。Property changes can occur only during object initialization. 调用BeginInit以发送初始化已开始的信号EndInit , 并通知初始化已完成。Call BeginInit to signal that initialization has begun and EndInit to signal that initialization has completed. 初始化后, 属性更改将被忽略。After initialization, property changes are ignored.

FormatConvertedBitmap使用FormatConvertedBitmap(BitmapSource, PixelFormat, BitmapPalette, Double)构造函数创建的对象将自动初始化, 而属性更改将被忽略。FormatConvertedBitmap objects created using the FormatConvertedBitmap(BitmapSource, PixelFormat, BitmapPalette, Double) constructor are automatically initialized, and property changes are ignored.

对于具有不同特征的 RGB 颜色空间之间的格式转换ColorConvertedBitmap , 应使用类。For format conversions between RGB color spaces with different characteristics, the ColorConvertedBitmap class should be used. 颜色空间之间的转换需要使用源颜色配置文件和用于 gamut 映射的目标颜色配置文件来提供可靠的颜色转换。Conversions between color spaces need a source color profile and destination color profile for gamut mapping to provide a reliable color conversion. 颜色配置文件ColorContext由的ColorConvertedBitmap参数或DestinationColorContextSourceColorContext属性提供。The color profiles are provided by the ColorContext parameters of the ColorConvertedBitmap or by the DestinationColorContext and SourceColorContext properties.

如果在应用转换后将图像保存到文件, 则必须更新与图像数据相关的元数据标记。Metadata tags related to image data must be updated if an image is saved to a file after a transform is applied.

构造函数

FormatConvertedBitmap()

初始化 FormatConvertedBitmap 类的新实例。Initializes a new instance of the FormatConvertedBitmap class.

FormatConvertedBitmap(BitmapSource, PixelFormat, BitmapPalette, Double)

初始化具有指定 FormatConvertedBitmapSourceDestinationFormatDestinationPaletteAlphaThreshold 类的一个新实例。Initializes a new instance of the FormatConvertedBitmap class that has the specified Source, DestinationFormat, DestinationPalette, and AlphaThreshold.

字段

AlphaThresholdProperty

标识 AlphaThreshold 依赖项属性。Identifies the AlphaThreshold dependency property.

DestinationFormatProperty

标识 DestinationFormat 依赖项属性。Identifies the DestinationFormat dependency property.

DestinationPaletteProperty

标识 DestinationPalette 依赖项属性。Identifies the DestinationPalette dependency property.

SourceProperty

标识 Source 依赖项属性。Identifies the Source dependency property.

属性

AlphaThreshold

获取或设置将位图转换为可识别 Alpha 颜色的托盘化格式时,位图的 Alpha 通道阈值。Gets or sets the alpha channel threshold of a bitmap when converting to palletized formats that recognizes an alpha color.

CanFreeze

获取一个值,该值指示是否可将对象变为不可修改。Gets a value that indicates whether the object can be made unmodifiable.

(继承自 Freezable)
DependencyObjectType

获取对此实例的 CLRCLR 类型进行包装的 DependencyObjectTypeGets the DependencyObjectType that wraps the CLRCLR type of this instance.

(继承自 DependencyObject)
DestinationFormat

获取或设置要将位图转换成的像素格式。Gets or sets the pixel format to convert the bitmap to.

DestinationPalette

获取或设置当索引格式时要应用于位图的调色板。Gets or sets the palette to apply to the bitmap if the format is indexed.

Dispatcher

获取与此 Dispatcher 关联的 DispatcherObjectGets the Dispatcher this DispatcherObject is associated with.

(继承自 DispatcherObject)
DpiX

获取图像的水平每英寸点数 (dpi)dots per inch (dpi)Gets the horizontal 每英寸点数 (dpi)dots per inch (dpi) of the image.

(继承自 BitmapSource)
DpiY

获取图像的垂直每英寸点数 (dpi)dots per inch (dpi)Gets the vertical 每英寸点数 (dpi)dots per inch (dpi) of the image.

(继承自 BitmapSource)
Format

获取位图数据的本机 PixelFormatGets the native PixelFormat of the bitmap data.

(继承自 BitmapSource)
HasAnimatedProperties

获取一个值,该值指示一个或多个 AnimationClock 对象是否与此对象的任何依赖项属性相关联。Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties.

(继承自 Animatable)
Height

获取源位图的高度(以与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit)为单位)。Gets the height of the source bitmap in 与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit).

(继承自 BitmapSource)
IsDownloading

获取一个值,该值指示 BitmapSource 内容当前是否正在下载。Gets a value that indicates whether the BitmapSource content is currently downloading.

(继承自 BitmapSource)
IsFrozen

获取一个值,该值指示对象当前是否可修改。Gets a value that indicates whether the object is currently modifiable.

(继承自 Freezable)
IsSealed

获取一个值,该值指示此实例当前是否为密封的(只读)。Gets a value that indicates whether this instance is currently sealed (read-only).

(继承自 DependencyObject)
Metadata

获取与此位图图像关联的元数据。Gets the metadata that is associated with this bitmap image.

(继承自 BitmapSource)
Palette

获取位图的调色板(如果指定了调色板)。Gets the color palette of the bitmap, if one is specified.

(继承自 BitmapSource)
PixelHeight

获取位图的高度(以像素为单位)。Gets the height of the bitmap in pixels.

(继承自 BitmapSource)
PixelWidth

获取位图的宽度(以像素为单位)。Gets the width of the bitmap in pixels.

(继承自 BitmapSource)
Source

获取或设置位图源。Gets or sets the source for the bitmap.

Width

获取位图的宽度(以与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit)为单位)。Gets the width of the bitmap in 与设备无关的单位(每个单位 1/96 英寸)device-independent units (1/96th inch per unit).

(继承自 BitmapSource)

方法

ApplyAnimationClock(DependencyProperty, AnimationClock)

AnimationClock 应用到指定的 DependencyPropertyApplies an AnimationClock to the specified DependencyProperty. 如果该属性已进行动画处理,则使用 SnapshotAndReplace 切换行为。If the property is already animated, the SnapshotAndReplace handoff behavior is used.

(继承自 Animatable)
ApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior)

AnimationClock 应用到指定的 DependencyPropertyApplies an AnimationClock to the specified DependencyProperty. 如果该属性已进行动画处理,则使用指定的 HandoffBehaviorIf the property is already animated, the specified HandoffBehavior is used.

(继承自 Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline)

将动画应用于指定 DependencyPropertyApplies an animation to the specified DependencyProperty. 动画会在呈现下一帧时启动。The animation is started when the next frame is rendered. 如果指定属性已进行动画处理,则使用 SnapshotAndReplace 切换行为。If the specified property is already animated, the SnapshotAndReplace handoff behavior is used.

(继承自 Animatable)
BeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior)

将动画应用于指定 DependencyPropertyApplies an animation to the specified DependencyProperty. 动画会在呈现下一帧时启动。The animation is started when the next frame is rendered. 如果指定的属性已进行动画处理,则使用指定的 HandoffBehaviorIf the specified property is already animated, the specified HandoffBehavior is used.

(继承自 Animatable)
BeginInit()

用信号通知 FormatConvertedBitmap 初始化开始。Signals the start of the FormatConvertedBitmap initialization.

CheckAccess()

确定调用线程是否可以访问此 DispatcherObjectDetermines whether the calling thread has access to this DispatcherObject.

(继承自 DispatcherObject)
CheckIfSiteOfOrigin()

检查位图源内容是否来自已知源的站点。Checks whether the bitmap source content is from a known site of origin. 此方法用于确保像素复制操作的安全。This method is used to make sure that pixel copying operations are safe.

(继承自 BitmapSource)
ClearValue(DependencyProperty)

清除属性的本地值。Clears the local value of a property. 要清除的属性由 DependencyProperty 标识符指定。The property to be cleared is specified by a DependencyProperty identifier.

(继承自 DependencyObject)
ClearValue(DependencyPropertyKey)

清除只读属性的本地值。Clears the local value of a read-only property. 要清除的属性由 DependencyPropertyKey 指定。The property to be cleared is specified by a DependencyPropertyKey.

(继承自 DependencyObject)
Clone()

创建此 FormatConvertedBitmap 的可修改克隆,从而深度复制此对象的值。Creates a modifiable clone of this FormatConvertedBitmap, making deep copies of this object's values. 在复制依赖项属性时,此方法会复制资源引用和数据绑定(但可能不再解析),但不复制动画或其当前值。When copying dependency properties, this method copies resource references and data bindings (but they might no longer resolve) but not animations or their current values.

CloneCore(Freezable)

使此实例成为指定 BitmapSource 的深层副本。Makes this instance a deep copy of the specified BitmapSource. 在复制依赖项属性时,此方法会复制资源引用和数据绑定(但可能不再解析),但不复制动画或其当前值。When copying dependency properties, this method copies resource references and data bindings (but they might no longer resolve) but not animations or their current values.

(继承自 BitmapSource)
CloneCurrentValue()

创建此 FormatConvertedBitmap 对象的可修改复本,从而深度复制此对象的当前值。Creates a modifiable clone of this FormatConvertedBitmap object, making deep copies of this object's current values. 不复制资源引用、数据绑定和动画,而是复制其当前值。Resource references, data bindings, and animations are not copied, but their current values are.

CloneCurrentValueCore(Freezable)

使用当前的属性值使此实例成为指定 BitmapSource 的可修改深层复制。Makes this instance a modifiable deep copy of the specified BitmapSource using current property values. 不复制资源引用、数据绑定和动画,而是复制其当前值。Resource references, data bindings, and animations are not copied, but their current values are.

(继承自 BitmapSource)
CoerceValue(DependencyProperty)

对指定依赖属性的值进行强制。Coerces the value of the specified dependency property. 通过对调用方 DependencyObject 上存在的依赖属性的属性元数据中所指定的任何 CoerceValueCallback 函数进行调用来完成此操作。This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject.

(继承自 DependencyObject)
CopyPixels(Array, Int32, Int32)

将位图像素数据复制到具有从指定偏移量开始的指定跨距的像素数组中。Copies the bitmap pixel data into an array of pixels with the specified stride, starting at the specified offset.

(继承自 BitmapSource)
CopyPixels(Int32Rect, Array, Int32, Int32)

将指定矩形中的位图像素数据复制到具有从指定偏移量开始的指定跨距的像素数组中。Copies the bitmap pixel data within the specified rectangle into an array of pixels that has the specified stride starting at the specified offset.

(继承自 BitmapSource)
CopyPixels(Int32Rect, IntPtr, Int32, Int32)

复制指定矩形中的位图像素数据。Copies the bitmap pixel data within the specified rectangle.

(继承自 BitmapSource)
CreateInstance()

初始化 Freezable 类的新实例。Initializes a new instance of the Freezable class.

(继承自 Freezable)
CreateInstanceCore()

在派生类中实现时,创建 Freezable 派生类的新实例。When implemented in a derived class, creates a new instance of the Freezable derived class.

(继承自 Freezable)
EndInit()

用信号通知 FormatConvertedBitmap 初始化结束。Signals the end of the FormatConvertedBitmap initialization.

Equals(Object)

确定提供的 DependencyObject 是否等效于当前 DependencyObjectDetermines whether a provided DependencyObject is equivalent to the current DependencyObject.

(继承自 DependencyObject)
Freeze()

使当前对象不可修改,并且将其 IsFrozen 属性设置为 trueMakes the current object unmodifiable and sets its IsFrozen property to true.

(继承自 Freezable)
FreezeCore(Boolean)

使 BitmapSource 实例或派生类为不可变的。Makes an instance of BitmapSource or a derived class immutable.

(继承自 BitmapSource)
GetAnimationBaseValue(DependencyProperty)

返回指定的 DependencyProperty 的未经过动画处理的值。Returns the non-animated value of the specified DependencyProperty.

(继承自 Animatable)
GetAsFrozen()

使用基(未经过动画处理的)属性值创建 Freezable 的冻结副本。Creates a frozen copy of the Freezable, using base (non-animated) property values. 由于副本已冻结,因此将通过引用复制任何冻结的子对象。Because the copy is frozen, any frozen sub-objects are copied by reference.

(继承自 Freezable)
GetAsFrozenCore(Freezable)

使此实例成为指定的 BitmapSource 对象的克隆。Makes this instance a clone of the specified BitmapSource object.

(继承自 BitmapSource)
GetCurrentValueAsFrozen()

使用当前属性值创建 Freezable 的冻结副本。Creates a frozen copy of the Freezable using current property values. 由于副本已冻结,因此将通过引用复制任何冻结的子对象。Because the copy is frozen, any frozen sub-objects are copied by reference.

(继承自 Freezable)
GetCurrentValueAsFrozenCore(Freezable)

使此实例成为指定 BitmapSource 的冻结复本。Makes this instance a frozen clone of the specified BitmapSource. 不复制资源引用、数据绑定和动画,而是复制其当前值。Resource references, data bindings, and animations are not copied, but their current values are.

(继承自 BitmapSource)
GetHashCode()

获取此 DependencyObject 的哈希代码。Gets a hash code for this DependencyObject.

(继承自 DependencyObject)
GetLocalValueEnumerator()

创建一个专用的枚举数,用于确定哪些依赖项属性在此 DependencyObject 上具有以本地方式设置的值。Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject.

(继承自 DependencyObject)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
GetValue(DependencyProperty)

DependencyObject 的此实例返回依赖属性的当前有效值。Returns the current effective value of a dependency property on this instance of a DependencyObject.

(继承自 DependencyObject)
InvalidateProperty(DependencyProperty)

重新评估指定依赖属性的有效值。Re-evaluates the effective value for the specified dependency property.

(继承自 DependencyObject)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
OnChanged()

修改当前 Freezable 对象时调用。Called when the current Freezable object is modified.

(继承自 Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject)

确保为刚刚设置的 DependencyObjectType 数据成员建立适当的上下文指针。Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set.

(继承自 Freezable)
OnFreezablePropertyChanged(DependencyObject, DependencyObject, DependencyProperty)

此成员支持 Windows Presentation Foundation (WPF)Windows Presentation Foundation (WPF) 基础结构,但不能在代码中直接使用。This member supports the Windows Presentation Foundation (WPF)Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code.

(继承自 Freezable)
OnPropertyChanged(DependencyPropertyChangedEventArgs)

重写 OnPropertyChanged(DependencyPropertyChangedEventArgs)DependencyObject 实现,以同时调用任何响应类型 Freezable 不断变化的依赖属性的 Changed 处理程序。Overrides the DependencyObject implementation of OnPropertyChanged(DependencyPropertyChangedEventArgs) to also invoke any Changed handlers in response to a changing dependency property of type Freezable.

(继承自 Freezable)
ReadLocalValue(DependencyProperty)

如果存在,则返回依赖属性的本地值。Returns the local value of a dependency property, if it exists.

(继承自 DependencyObject)
ReadPreamble()

确保正在从有效的线程访问 FreezableEnsures that the Freezable is being accessed from a valid thread. Freezable 的继承者必须在任何 API 一开始读取不属于依赖项对象的数据成员时调用此方法。Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties.

(继承自 Freezable)
SetCurrentValue(DependencyProperty, Object)

设置依赖属性的值而不更改其值源。Sets the value of a dependency property without changing its value source.

(继承自 DependencyObject)
SetValue(DependencyProperty, Object)

设置依赖属性的本地值,该值由其依赖属性标识符指定。Sets the local value of a dependency property, specified by its dependency property identifier.

(继承自 DependencyObject)
SetValue(DependencyPropertyKey, Object)

设置一个只读依赖属性的本地值,该值由依赖属性的 DependencyPropertyKey 标识符指定。Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property.

(继承自 DependencyObject)
ShouldSerializeProperty(DependencyProperty)

返回一个值,该值指示序列化进程是否应序列化所提供的依赖属性的值。Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.

(继承自 DependencyObject)
ToString()

基于当前区域性创建此对象的字符串表示形式。Creates a string representation of this object based on the current culture.

(继承自 ImageSource)
ToString(IFormatProvider)

基于传入的 IFormatProvider 创建此对象的字符串表示形式。Creates a string representation of this object based on the IFormatProvider passed in. 如果提供程序为 null,则使用 CurrentCultureIf the provider is null, the CurrentCulture is used.

(继承自 ImageSource)
VerifyAccess()

强制调用线程具有此 DispatcherObject 的访问权限。Enforces that the calling thread has access to this DispatcherObject.

(继承自 DispatcherObject)
WritePostscript()

引发 FreezableChanged 事件并调用其 OnChanged() 方法。Raises the Changed event for the Freezable and invokes its OnChanged() method. Freezable 派生的类应在修改的类成员不存储为依赖属性的任何 API 的末尾调用此方法。Classes that derive from Freezable should call this method at the end of any API that modifies class members that are not stored as dependency properties.

(继承自 Freezable)
WritePreamble()

验证 Freezable 是否未被冻结,并且是否正在从有效的线程上下文中访问它。Verifies that the Freezable is not frozen and that it is being accessed from a valid threading context. Freezable 的继承项应当在任何 API 一开始写入不属于依赖项属性的数据成员时调用此方法。Freezable inheritors should call this method at the beginning of any API that writes to data members that are not dependency properties.

(继承自 Freezable)

事件

Changed

在修改 Freezable 或其包含的对象时发生。Occurs when the Freezable or an object it contains is modified.

(继承自 Freezable)
DecodeFailed

在由于图像标题损坏而无法下载图像时发生。Occurs when the image fails to load, due to a corrupt image header.

(继承自 BitmapSource)
DownloadCompleted

在下载完位图内容时发生。Occurs when the bitmap content has been completely downloaded.

(继承自 BitmapSource)
DownloadFailed

在无法下载位图内容时发生。Occurs when the bitmap content failed to download.

(继承自 BitmapSource)
DownloadProgress

在下载位图内容的进度有变化时发生。Occurs when the download progress of the bitmap content has changed.

(继承自 BitmapSource)

显式界面实现

IFormattable.ToString(String, IFormatProvider)

使用指定的格式格式化当前实例的值。Formats the value of the current instance using the specified format.

(继承自 ImageSource)

适用于

另请参阅