IDWriteTextAnalyzer::GetGlyphPlacements method (dwrite.h)

Places glyphs output from the GetGlyphs method according to the font and the writing system's rendering rules.

Syntax

HRESULT GetGlyphPlacements(
  [in]           WCHAR const                           *textString,
  [in]           UINT16 const                          *clusterMap,
  [in]           DWRITE_SHAPING_TEXT_PROPERTIES        *textProps,
                 UINT32                                textLength,
  [in]           UINT16 const                          *glyphIndices,
  [in]           DWRITE_SHAPING_GLYPH_PROPERTIES const *glyphProps,
                 UINT32                                glyphCount,
                 IDWriteFontFace                       *fontFace,
                 FLOAT                                 fontEmSize,
                 BOOL                                  isSideways,
                 BOOL                                  isRightToLeft,
  [in]           DWRITE_SCRIPT_ANALYSIS const          *scriptAnalysis,
  [in, optional] WCHAR const                           *localeName,
  [in, optional] DWRITE_TYPOGRAPHIC_FEATURES const     **features,
  [in, optional] UINT32 const                          *featureRangeLengths,
                 UINT32                                featureRanges,
  [out]          FLOAT                                 *glyphAdvances,
  [out]          DWRITE_GLYPH_OFFSET                   *glyphOffsets
);

Parameters

[in] textString

Type: const WCHAR*

An array of characters containing the original string from which the glyphs came.

[in] clusterMap

Type: const UINT16*

A pointer to the mapping from character ranges to glyph ranges. This is returned by GetGlyphs.

[in] textProps

Type: DWRITE_SHAPING_TEXT_PROPERTIES*

A pointer to an array of structures that contains shaping properties for each character. This structure is returned by GetGlyphs.

textLength

Type: UINT32

The text length of textString.

[in] glyphIndices

Type: const UINT16*

An array of glyph indices returned by GetGlyphs.

[in] glyphProps

Type: const DWRITE_SHAPING_GLYPH_PROPERTIES*

A pointer to an array of structures that contain shaping properties for each glyph returned by GetGlyphs.

glyphCount

Type: UINT32

The number of glyphs returned from GetGlyphs.

fontFace

Type: IDWriteFontFace*

A pointer to the font face that is the source for the output glyphs.

fontEmSize

Type: FLOAT

The logical font size in DIPs.

isSideways

Type: BOOL

A Boolean flag set to TRUE if the text is intended to be drawn vertically.

isRightToLeft

Type: BOOL

A Boolean flag set to TRUE for right-to-left text.

[in] scriptAnalysis

Type: const DWRITE_SCRIPT_ANALYSIS*

A pointer to a Script analysis result from an AnalyzeScript call.

[in, optional] localeName

Type: const WCHAR*

An array of characters containing the locale to use when selecting glyphs. For example, the same character may map to different glyphs for ja-jp versus zh-chs. If this is NULL, the default mapping based on the script is used.

[in, optional] features

Type: const DWRITE_TYPOGRAPHIC_FEATURES**

An array of pointers to the sets of typographic features to use in each feature range.

[in, optional] featureRangeLengths

Type: const UINT32*

The length of each feature range, in characters.
The sum of all lengths should be equal to textLength.

featureRanges

Type: UINT32

The number of feature ranges.

[out] glyphAdvances

Type: FLOAT*

When this method returns, contains the advance width of each glyph.

[out] glyphOffsets

Type: DWRITE_GLYPH_OFFSET*

When this method returns, contains the offset of the origin of each glyph.

Return value

Type: HRESULT

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

Requirements

See also

IDWriteTextAnalyzer