IDWriteTextLayout::GetLineMetrics method (dwrite.h)

Retrieves the information about each individual text line of the text string.

Syntax

HRESULT GetLineMetrics(
  [out, optional] DWRITE_LINE_METRICS *lineMetrics,
                  UINT32              maxLineCount,
  [out]           UINT32              *actualLineCount
);

Parameters

[out, optional] lineMetrics

Type: DWRITE_LINE_METRICS*

When this method returns, contains a pointer to an array of structures containing various calculated length values of individual text lines.

maxLineCount

Type: UINT32

The maximum size of the lineMetrics array.

[out] actualLineCount

Type: UINT32*

When this method returns, contains the actual size of the lineMetrics array that is needed.

Return value

Type: HRESULT

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

Remarks

If maxLineCount is not large enough E_NOT_SUFFICIENT_BUFFER, which is equivalent to HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER), is returned and *actualLineCount is set to the number of lines needed.

Requirements

See also

IDWriteTextLayout