Device.UpdateSurface Method ()

Copies rectangular subsets of pixels from one surface to another.

Overload List

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 formatTextureRT textureRTOff-screen plain
TextureYesYesYes*Yes
RT textureNoNoNoNo
RTNoNoNoNo
Off-screen plainYesYesYesYes

* 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.
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