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IDCompositionDevice::CreateTransformGroup method

Creates a 2D transform group object that holds an array of 2D transform objects.

Syntax


HRESULT CreateTransformGroup(
  [in]   IDCompositionTransform **transforms,
  [in]   UINT elements,
  [out]  IDCompositionTransform **transformGroup
);

Parameters

transforms [in]

Type: IDCompositionTransform**

An array of 2D transform objects that make up this transform group.

elements [in]

Type: UINT

The number of elements in the transforms array.

transformGroup [out]

Type: IDCompositionTransform**

The new transform group object. This parameter must not be NULL.

Return value

Type: HRESULT

If the function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. See DirectComposition Error Codes for a list of error codes.

Remarks

The array entries in a transform group cannot be changed. However, each transform in the array can be modified through its own property setting methods. If a transform in the array is modified, the change is reflected in the computed matrix of the transform group.

Requirements

Minimum supported client

Windows 8 [desktop apps only]

Minimum supported server

Windows Server 2012 [desktop apps only]

Header

Dcomp.h

Library

Dcomp.lib

DLL

Dcomp.dll

See also

IDCompositionDevice
IDCompositionVisual::SetTransform