IDWriteFactory::CreateGdiCompatibleTextLayout method

Takes a string, format, and associated constraints, and produces an object representing the result, formatted for a particular display resolution and measuring mode.

Syntax

virtual HRESULT CreateGdiCompatibleTextLayout(
  [in]           const WCHAR             * string,
                       UINT32             stringLength,
                       IDWriteTextFormat * textFormat,
                       FLOAT              layoutWidth,
                       FLOAT              layoutHeight,
                       FLOAT              pixelsPerDip,
  [in, optional] const DWRITE_MATRIX     * transform,
                       BOOL               useGdiNatural,
  [out]                IDWriteTextLayout ** textLayout
) = 0;

Parameters

string [in]

Type: const WCHAR*

An array of characters that contains the string to create a new IDWriteTextLayout object from. This array must be of length stringLength and can contain embedded NULL characters.

stringLength

Type: UINT32

The length of the string, in character count.

textFormat

Type: IDWriteTextFormat*

The text formatting object to apply to the string.

layoutWidth

Type: FLOAT

The width of the layout box.

layoutHeight

Type: FLOAT

The height of the layout box.

pixelsPerDip

Type: FLOAT

The number of physical pixels per DIP (device independent pixel). For example, if rendering onto a 96 DPI device pixelsPerDip is 1. If rendering onto a 120 DPI device pixelsPerDip is 1.25 (120/96).

transform [in, optional]

Type: const DWRITE_MATRIX*

An optional transform applied to the glyphs and their positions. This transform is applied after the scaling specifies the font size and pixels per DIP.

useGdiNatural

Type: BOOL

Instructs the text layout to use the same metrics as GDI bi-level text when set to FALSE. When set to TRUE, instructs the text layout to use the same metrics as text measured by GDI using a font created with CLEARTYPE_NATURAL_QUALITY.

textLayout [out]

Type: IDWriteTextLayout**

When this method returns, contains an address to the pointer of the resultant text layout object.

Return value

Type: HRESULT

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

Remarks

The resulting text layout should only be used for the intended resolution, and for cases where text scalability is desired CreateTextLayout should be used instead.

Requirements

See also

IDWriteFactory