DocumentViewerBase.UseDirectXPaint Property

Specifies whether the Document Viewer control uses the DirectX Hardware Acceleration.

Namespace : DevExpress.DocumentView.Controls

Assembly : DevExpress.Utils.v25.2.dll

NuGet Packages : DevExpress.Utils, DevExpress.Wpf.Core

Declaration

C#
VB.NET

csharp

[DefaultValue(DefaultBoolean.Default)]
[DXCategory("Appearance")]
public virtual DefaultBoolean UseDirectXPaint { get; set; }

<DefaultValue(DefaultBoolean.Default)>
<DXCategory("Appearance")>
Public Overridable Property UseDirectXPaint As DefaultBoolean

Property Value

Type	Default	Description
DefaultBoolean	Default

True , to enable the DirectX Hardware Acceleration for the Document Viewer control; otherwise, False. The Default value is equivalent to False.

Available values:

Name	Description	Return Value
True

The value is true.

0

| | False |

The value is false.

1

| | Default |

The value is specified by a global option or a higher-level object.

2

Remarks

The GDI+ library is the default rendering engine for the Document Viewer control. If a viewer displays a document that contains many pages, this engine might render this document slowly. You can switch to the DirectX rendering engine to boost rendering performance. For this, enable the viewer’s UseDirectXPaint property. You can set the viewer’s EnableSmoothScrolling property to True to allow for more smooth page scrolling in DirectX mode. Note that smooth scrolling might require more application resources to render the pages.

The following limitations apply to the viewer when it uses DirectX rendering:

The Cached Report Source component is not supported.
The XRRichText control is rendered as an opaque image. The default GDI+ library is used to render this control.
String sizes in a document might be greater compared with the case when the GDI+ library is used to render the document.
GDI+ and DirectX use different measurement mechanisms, and rendering problems can also occur near page boundaries.