PFN_DrvQueryGlyphAttrs callback function (winddi.h)
The DrvQueryGlyphAttrs function returns information about a font's glyphs.
Syntax
PFN_DrvQueryGlyphAttrs PfnDrvqueryglyphattrs;
PFD_GLYPHATTR PfnDrvqueryglyphattrs(
FONTOBJ *unnamedParam1,
ULONG unnamedParam2
)
{...}
Parameters
unnamedParam1
unnamedParam2
Return value
DrvQueryGlyphAttrs should return a pointer to an FD_GLYPHATTR structure. If an error is encountered, such as an invalid input argument, or if the font described by the FONTOBJ structure is not a vertical font, the function should return NULL.
Remarks
The DrvQueryGlyphAttrs function should be supplied by font drivers. Currently, the only attribute flag defined is FO_ATTR_MODE_ROTATE, meaning the function should indicate which glyphs of a vertical font must be rotated. (For vertical fonts, DBCS glyphs must be rotated.) This information is useful to printer drivers that support printers having built-in font rasterizers.
The function should return rotation information in the FD_GLYPHATTR structure that is used as the function's return value.
GDI calls the appropriate font driver's DrvQueryGlyphAttrs function when a printer driver calls GDI's FONTOBJ_pQueryGlyphAttrs function.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | winddi.h (include Winddi.h) |