D3DImagePresentationTarget.EnableAlpha Property

D3DImagePresentationTargetEnableAlpha Property

Gets or sets a value indicating whether a render target with an alpha channel is created. This is a dependency property.

Namespace: DigitalRune.Graphics.Interop
Assembly: DigitalRune.Graphics (in DigitalRune.Graphics.dll) Version: 1.2.0.0 (1.2.1.14562)

Syntax

C++

Copy

public bool EnableAlpha { get; set; }

Public Property EnableAlpha As Boolean
	Get
	Set

public:
property bool EnableAlpha {
	bool get ();
	void set (bool value);
}

member EnableAlpha : bool with get, set

Property Value

Type: Boolean
The a value indicating whether a render target with an alpha channel is created. The default value is .

Remarks

An alpha channel is required for transparency effects. If EnableAlpha is , the 3D image is opaque and overwrites any WPF elements in the background. If EnableAlpha is , the 3D image can contain transparent pixels. Transparent parts are blended with other WPF elements in the background.

Changing this property invalidates the content and the 3D image needs to be re-rendered.

Important: WPF requires premultiplied alpha, which means that the color values in the 3D image needs to be multiplied by the alpha value!

Reference

D3DImagePresentationTarget Class

DigitalRune.Graphics.Interop Namespace