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ID2D1Geometry::ComputeLength(constD2D1_MATRIX_3X2_F*,FLOAT*) method (d2d1.h)

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Calculates the length of the geometry as though each segment were unrolled into a line.

Syntax

HRESULT ComputeLength(
  const D2D1_MATRIX_3X2_F *worldTransform,
  FLOAT                   *length
);

Parameters

worldTransform

Type: [in, optional] const D2D1_MATRIX_3X2_F*

The transform to apply to the geometry before calculating its length, or NULL.

length

Type: [out] FLOAT*

When this method returns, contains a pointer to the length of the geometry. For closed geometries, the length includes an implicit closing segment. You must allocate storage for this parameter.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements

Requirement Value
Minimum supported client Windows 7, Windows Vista with SP2 and Platform Update for Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 R2, Windows Server 2008 with SP2 and Platform Update for Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header d2d1.h
Library D2d1.lib
DLL D2d1.dll

See also

ID2D1Geometry