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Device.UpdateSurface(Surface,Surface,Point) Method (Microsoft.DirectX.Direct3D)

  • Article

Copies rectangular subsets of pixels from one surface to another.

Definition

Visual Basic Public Sub UpdateSurface( _
    ByVal sourceSurface As Surface, _
    ByVal destinationSurface As Surface, _
    ByVal destPoint As PointLeave Site _
)
C# public void UpdateSurface(
    Surface sourceSurface,
    Surface destinationSurface,
    PointLeave Site destPoint
);
C++ public:
void UpdateSurface(
    Surface^ sourceSurface,
    Surface^ destinationSurface,
    PointLeave Site destPoint
);
JScript public function UpdateSurface(
    sourceSurface : Surface,
    destinationSurface : Surface,
    destPoint : PointLeave Site
);

Parameters

sourceSurface Microsoft.DirectX.Direct3D.Surface
A Surface object that represents the source surface; must point to a surface other than destinationSurface.
destinationSurface Microsoft.DirectX.Direct3D.Surface
A Surface object that represents the destination surface.
destPoint System.Drawing.Point
A PointLeave Site object that represents the upper-left corner of the destination rectangle. Specifying null for this parameter causes the entire surface to be copied.

Remarks

This method has the following restrictions.

  • The source surface must have been created with Pool.SystemMemory.
  • The destination surface must have been created with Pool.Default.
  • Neither surface can be locked or hold an outstanding device context.
  • Neither surface can be created with multisampling. The only valid flag for both surfaces is MultiSampleType.None.
  • The surface format cannot be a depth stencil format.
  • The source and destination rectangles must fit within the surface.
  • No stretching or shrinking is allowed; that is, the rectangles must be the same size.
  • The source format must match the destination format.

The following table shows the supported format combinations.

Destination format
Source format Texture RT texture RT Off-screen plain
Texture Yes Yes Yes* Yes
RT texture No No No No
RT No No No No
Off-screen plain Yes Yes Yes Yes

* If the driver does not support the requested copy, it is emulated using locking and copying.

If the application needs to copy data from a Pool.Default render target to a Pool.SystemMemory surface, it can use Device.GetRenderTargetData.

Exceptions

InvalidCallException

The method call is invalid. For example, a method's parameter might contain an invalid value.