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IDWriteTextAnalyzer1::GetJustificationOpportunities method (dwrite_1.h)

  • Article

Retrieves justification opportunity information for each of the glyphs given the text and shaping glyph properties.

Syntax

HRESULT GetJustificationOpportunities(
        IDWriteFontFace                       *fontFace,
        FLOAT                                 fontEmSize,
        DWRITE_SCRIPT_ANALYSIS                scriptAnalysis,
        UINT32                                textLength,
        UINT32                                glyphCount,
  [in]  WCHAR const                           *textString,
  [in]  UINT16 const                          *clusterMap,
  [in]  DWRITE_SHAPING_GLYPH_PROPERTIES const *glyphProperties,
  [out] DWRITE_JUSTIFICATION_OPPORTUNITY      *justificationOpportunities
);

Parameters

fontFace

Type: IDWriteFontFace*

Font face that was used for shaping. This is mainly important for returning correct results of the kashida width.

May be NULL.

fontEmSize

Type: FLOAT

Font em size used for the glyph run.

scriptAnalysis

Type: DWRITE_SCRIPT_ANALYSIS

Script of the text from the itemizer.

textLength

Type: UINT32

Length of the text.

glyphCount

Type: UINT32

Number of glyphs.

[in] textString

Type: const WCHAR*

Characters used to produce the glyphs.

[in] clusterMap

Type: const UINT16*

Clustermap produced from shaping.

[in] glyphProperties

Type: const DWRITE_SHAPING_GLYPH_PROPERTIES*

Glyph properties produced from shaping.

[out] justificationOpportunities

Type: DWRITE_JUSTIFICATION_OPPORTUNITY*

A pointer to a DWRITE_JUSTIFICATION_OPPORTUNITY structure that receives info for the allowed justification expansion/compression for each glyph.

Return value

Type: HRESULT

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

Remarks

This function is called per-run, after shaping is done via the IDWriteTextAnalyzer::GetGlyphs method.

Note  this function only supports natural metrics (DWRITE_MEASURING_MODE_NATURAL).

 

Requirements

Requirement Value
Minimum supported client Windows 8 and Platform Update for Windows 7 [desktop apps | UWP apps]
Minimum supported server Windows Server 2012 and Platform Update for Windows Server 2008 R2 [desktop apps | UWP apps]
Target Platform Windows
Header dwrite_1.h
Library Dwrite_1.lib
DLL Dwrite_1.dll

See also

IDWriteTextAnalyzer1