ScriptGetLogicalWidths function (usp10.h)
Converts the glyph advance widths for a specific font into logical widths.
Syntax
HRESULT ScriptGetLogicalWidths(
[in] const SCRIPT_ANALYSIS *psa,
[in] int cChars,
[in] int cGlyphs,
[in] const int *piGlyphWidth,
[in] const WORD *pwLogClust,
[in] const SCRIPT_VISATTR *psva,
[out] int *piDx
);
Parameters
[in] psa
Pointer to a SCRIPT_ANALYSIS structure.
[in] cChars
Count of the logical code points in the run.
[in] cGlyphs
Count of the glyphs in the run.
[in] piGlyphWidth
Pointer to an array of glyph advance widths.
[in] pwLogClust
Pointer to an array of logical clusters.
[in] psva
Pointer to a SCRIPT_VISATTR structure defining visual attributes.
[out] piDx
Pointer to an array of logical widths.
Return value
Currently returns S_OK in all cases.
Remarks
This function is useful for recording widths in a font-independent manner. It converts the glyph advance widths calculated for a specific font into logical widths, one per code point, in the same order as the code points. If the same string is then displayed on a different device using a different font, the logical widths can be applied by using ScriptApplyLogicalWidth to approximate the original placement. This mechanism is useful when implementing print preview. On the preview screen, it is important to match the layout and placement of the final printed result.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | usp10.h |
| Library | Usp10.lib |
| DLL | Usp10.dll |
| Redistributable | Internet Explorer 5 or later on Windows Me/98/95 |