FD_GLYPHATTR structure (winddi.h)

The FD_GLYPHATTR structure is used to specify the return value for the FONTOBJ_pQueryGlyphAttrs and DrvQueryGlyphAttrs functions.

Syntax

typedef struct _FD_GLYPHATTR {
  ULONG cjThis;
  ULONG cGlyphs;
  ULONG iMode;
  BYTE  aGlyphAttr[1];
} FD_GLYPHATTR, *PFD_GLYPHATTR;

Members

cjThis

Is the size in bytes of the FD_GLYPHATTR structure, including the array specified by the aGlyphAttr member.

cGlyphs

Specifies the number of glyphs in the font.

iMode

Is a flag indicating the type of information being returned. The following flag is defined:

Flag	Definition
FO_ATTR_MODE_ROTATE	The array specified by aGlyphAttr is a bit array indicating which glyphs of a vertical font must be rotated. The bit array's length is (cGlyphs+7)/8. If a glyph's bit is set, the glyph should be rotated during rasterization.

aGlyphAttr[1]

Is an array supplying the information specified by iMode. The size of this array is (cGlyphs+7) / 8 bytes.

Remarks

If iMode is FO_ATTR_MODE_ROTATE (the only flag currently defined), a printer driver can determine the bit that corresponds to a particular glyph index using the following code fragment, where hg is the glyph index and pga is a pointer to an FD_GLYPHATTR structure. If the bit in the aGlyphAttr array associated with glyph index hg is set, result is set to 1. If the same bit in the array is not set, result is set to 0. Note that the bits within a byte are stored so that glyph indexes 0, 1, ..., 7 correspond to bit positions 7, 6, ..., 0 within aGlyphAttr[0], glyph indexes 8, 9, ..., 15 correspond to bit positions 7, 6, ..., 0 within aGlyphAttr[1], and so on.

BYTE glyphBits[8] = {0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1};
result = (pga->aGlyphAttr[hg / 8]) & (glyphBits[hg % 8]);

Requirements

Requirement	Value
Header	winddi.h (include Winddi.h)