LOGFONT

Article
06/30/2006

This structure defines the attributes of a font.

typedef struct tagLOGFONT { 
  LONG lfHeight; 
  LONG lfWidth; 
  LONG lfEscapement; 
  LONG lfOrientation; 
  LONG lfWeight; 
  BYTE lfItalic; 
  BYTE lfUnderline; 
  BYTE lfStrikeOut; 
  BYTE lfCharSet; 
  BYTE lfOutPrecision; 
  BYTE lfClipPrecision; 
  BYTE lfQuality; 
  BYTE lfPitchAndFamily; 
  TCHAR lfFaceName[LF_FACESIZE]; 
} LOGFONT;

Members

lfHeight
Specifies the height, in logical units, of the font's character cell or character. The character height value (also known as the em height) is the character cell height value minus the internal-leading value. The font mapper interprets the value specified in lfHeight in the following manner.

Value	Description
> 0	The font mapper transforms this value into device units and matches it against the cell height of the available fonts.
0	The font mapper uses a default height value when it searches for a match.
< 0	The font mapper transforms this value into device units and matches its absolute value against the character height of the available fonts.

For all height comparisons, the font mapper looks for the largest font that does not exceed the requested size.

This mapping occurs when the font is used for the first time.

For the MM_TEXT mapping mode, you can use the following formula to specify a height for a font with a given point size.

lfHeight = -MulDiv(PointSize, GetDeviceCaps(hDC, LOGPIXELSY), 72);

lfWidth
Specifies the average width, in logical units, of characters in the font. If lfWidth is not zero, the aspect ratio of the device is matched against the digitization aspect ratio of the available fonts to find the closest match, determined by the absolute value of the difference.
lfEscapement
Specifies the angle, in tenths of degrees, between the escapement vector and the x-axis of the device. The escapement vector is parallel to the base line of a row of text.

The lfEscapement member specifies both the escapement and orientation. You should set lfEscapement and lfOrientation to the same value.
lfOrientation
Specifies the angle, in tenths of degrees, between each character's base line and the x-axis of the device.

lfWeight
Specifies the weight of the font in the range 0 through 1000. For example, 400 is normal and 700 is bold. If this value is zero, a default weight is used.

The following values are defined for convenience.

Value	Weight
FW_DONTCARE	0
FW_THIN	100
FW_EXTRALIGHT	200
FW_ULTRALIGHT	200
FW_LIGHT	300
FW_NORMAL	400
FW_REGULAR	400
FW_MEDIUM	500
FW_SEMIBOLD	600
FW_DEMIBOLD	600
FW_BOLD	700
FW_EXTRABOLD	800
FW_ULTRABOLD	800
FW_HEAVY	900
FW_BLACK	900

lfItalic
Specifies an italic font if set to TRUE.
lfUnderline
Specifies an underlined font if set to TRUE.
lfStrikeOut
Specifies a strikeout font if set to TRUE.

lfCharSet
Specifies the character set. The following values are predefined:

ANSI_CHARSET	BALTIC_CHARSET
CHINESEBIG5_CHARSET	DEFAULT_CHARSET
EASTEUROPE_CHARSET	GB2312_CHARSET
GREEK_CHARSET	HANGUL_CHARSET
MAC_CHARSET	OEM_CHARSET
RUSSIAN_CHARSET	SHIFTJIS_CHARSET
SYMBOL_CHARSET	TURKISH_CHARSET

Korean Windows

JOHAB_CHARSET

Middle-Eastern Windows

HEBREW_CHARSET

ARABIC_CHARSET

Thai Windows

THAI_CHARSET

The OEM_CHARSET value specifies a character set that is operating-system dependent.

DEFAULT_CHARSET is set to a value based on the current system locale. For example, when the system locale is English (United States), the value is ANSI_CHARSET.

Fonts with other character sets may exist in the operating system. If an application uses a font with an unknown character set, it should not attempt to translate or interpret strings that are rendered with that font.

This member is important in the font mapping process. To ensure consistent results, specify a specific character set. If you specify a typeface name in the lfFaceName member, make sure that the lfCharSet value matches the character set of the typeface specified in lfFaceName*.*

lfOutPrecision
Specifies the output precision. The output precision defines how closely the output must match the requested font's height, width, character orientation, escapement, pitch, and font type. It can be one of the following values.

Value	Description
OUT_DEFAULT_PRECIS	Specifies the default font mapper behavior.
OUT_RASTER_PRECIS	Instructs the font mapper to choose a raster font when the system contains multiple fonts with the same name.
OUT_STRING_PRECIS	This value is not used by the font mapper, but it is returned when raster fonts are enumerated.

lfClipPrecision
Specifies the clipping precision. The clipping precision defines how to clip characters that are partially outside the clipping region. It can be one or more of the following values.

Value	Description
CLIP_DEFAULT_PRECIS	Specifies default clipping behavior.
CLIP_CHARACTER_PRECIS	Not used.
CLIP_STROKE_PRECIS	Not used by the font mapper, but is returned when raster, vector, or TrueType fonts are enumerated.

lfQuality
Specifies the output quality. The output quality defines how carefully the graphics device interface (GDI) must attempt to match the logical-font attributes to those of an actual physical font. It can be one of the following values.

Value	Description
ANTIALIASED_QUALITY	Enables antialiasing for the font. The display driver must support antialised text for this setting to work.
NONANTIALIASED_QUALITY	Forces use of draft quality when the HKEY_LOCAL_MACHINE\System\GDI\Fontsmoothing registry key is present.
CLEARTYPE_COMPAT_QUALITY	Enables ClearType® text for the font using compatible widths. A compatible width produces text that has the same spacing as non-ClearType text.
CLEARTYPE_QUALITY	Enables ClearType text for the font. The display driver must support ClearType text for this setting to work.
DEFAULT_QUALITY	Appearance of the font does not matter.
DRAFT_QUALITY	For GDI raster fonts, scaling is enabled, which means that more font sizes are available, but the quality may be lower. Bold, italic, underline, and strikeout fonts are synthesized if necessary.

lfPitchAndFamily
Specifies the pitch and family of the font. The two low-order bits specify the pitch of the font and can be one of the following values:

DEFAULT_PITCH
FIXED_PITCH
VARIABLE_PITCH

Bits 4 through 7 of the member specify the font family and can be one of the following values:

FF_DECORATIVE
FF_DONTCARE
FF_MODERN
FF_ROMAN
FF_SCRIPT
FF_SWISS

The proper value can be obtained by using the Boolean OR operator to join one pitch constant with one family constant.

Font families describe the look of a font in a general way. They are intended for specifying fonts when the exact typeface desired is not available. The values for font families are as follows.

Value	Description
FF_DECORATIVE	Novelty fonts, for example, Old English.
FF_DONTCARE	Do not care or do not know.
FF_MODERN	Fonts with constant stroke width (monospace), with or without serifs. Monospace fonts are usually modern, for example, Pica, Elite, and Courier New.
FF_ROMAN	Fonts with variable stroke width (proportional) and with serifs, for example, Serif.
FF_SCRIPT	Fonts designed to look like handwriting, for example, Script and Cursive.
FF_SWISS	Fonts with variable stroke width (proportional) and without serifs, for example, Sans Serif.

lfFaceName
Specifies a null-terminated string that specifies the typeface name of the font. The length of this string must not exceed 32 characters, including the terminating null character. The EnumFontFamilies function can be used to enumerate the typeface names of all currently available fonts. If lfFaceName is an empty string, GDI uses the first font that matches the other specified attributes.

Remarks

Windows CE 1.0 and 1.01 do not support the following values for lfClipPrecision:

CLIP_MASK
CLIP_EMBEDDED
CLIP_LH_ANGLES
CLIP_TT_ALWAYS

Windows CE 2.0 and later ignore the lfClipPrecision and lfQuality members with one important exception. If the raster font engine is installed, a IfClipPrecision value of CLIP_CHARACTER_PRECIS will cause functions that create and select fonts to fail.

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Wingdi.h.

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Remarks

Requirements

See Also

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