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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| WinNT
| Platform Notes
| Windows 95: int == 16 bits
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CreateFont
The CreateFont function creates a logical font that has specific characteristics. The
logical font can subsequently be selected as the font for any device.
HFONT CreateFont(
int nHeight,
| // logical height of font
| int nWidth,
| // logical average character width
| int nEscapement,
| // angle of escapement
| int nOrientation,
| // base-line orientation angle
| int fnWeight,
| // font weight
| DWORD fdwItalic,
| // italic attribute flag
| DWORD fdwUnderline,
| // underline attribute flag
| DWORD fdwStrikeOut,
| // strikeout attribute flag
| DWORD fdwCharSet,
| // character set identifier
| DWORD fdwOutputPrecision,
| // output precision
| DWORD fdwClipPrecision,
| // clipping precision
| DWORD fdwQuality,
| // output quality
| DWORD fdwPitchAndFamily,
| // pitch and family
| LPCTSTR lpszFace
| // pointer to typeface name string
| );
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Parameters
nHeight
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 nHeight in the following manner:
Value
| Meaning
| > 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.
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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 specified point size:
nHeight = -MulDiv(PointSize, GetDeviceCaps(hDC, LOGPIXELSY), 72);
nWidth
Specifies the average width, in logical units, of characters in the requested
font. If this value is zero, the font mapper chooses a "closest match" value.
The "closest match" value is determined by comparing the absolute values of the
difference between the current device's aspect ratio and the digitized aspect
ratio of available fonts.
nEscapement
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.
Windows NT:
When the graphics mode is set to GM_ADVANCED, you can specify the escapement
angle of the string independently of the orientation angle of the string's
characters.
When the graphics mode is set to GM_COMPATIBLE, nEscapement specifies both the escapement and orientation. You should set nEscapement and nOrientation to the same value.
Windows 95:
The nEscapement parameter specifies both the escapement and orientation. You should set nEscapement and nOrientation to the same value.
nOrientation
Specifies the angle, in tenths of degrees, between each character's base line
and the x-axis of the device.
fnWeight
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
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fdwItalic
Specifies an italic font if set to TRUE.
fdwUnderline
Specifies an underlined font if set to TRUE.
fdwStrikeOut
Specifies a strikeout font if set to TRUE.
fdwCharSet
Specifies the character set. The following values are predefined:
ANSI_CHARSET
DEFAULT_CHARSET
SYMBOL_CHARSET
SHIFTJIS_CHARSET
GB2312_CHARSET
HANGEUL_CHARSET
CHINESEBIG5_CHARSET
OEM_CHARSET
Windows 95 only:
JOHAB_CHARSET
HEBREW_CHARSET
ARABIC_CHARSET
GREEK_CHARSET
TURKISH_CHARSET
THAI_CHARSET
EASTEUROPE_CHARSET
RUSSIAN_CHARSET
MAC_CHARSET
BALTIC_CHARSET
The OEM_CHARSET value specifies a character set that is operating-system
dependent.
You can use the DEFAULT_CHARSET value to allow the name and size of a font to
fully describe the logical font. If the specified font name does not exist, a
font from any character set can be substituted for the specified font, so you
should use DEFAULT_CHARSET sparingly to avoid unexpected results.
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 parameter is important in the font mapping process. To ensure consistent
results, specify a specific character set. If you specify a typeface name in
the lpszFace parameter, make sure that the fdwCharSet value matches the character set of the typeface specified in lpszFace.
fdwOutputPrecision
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
| Meaning
| OUT_CHARACTER_PRECIS
| Not used.
| OUT_DEFAULT_PRECIS
| Specifies the default font mapper behavior.
| OUT_DEVICE_PRECIS
| Instructs the font mapper to choose a Device font when the system contains
multiple fonts with the same name.
| OUT_OUTLINE_PRECIS
| Windows NT: This value instructs the font mapper to choose from TrueType and other
outline-based fonts.
Windows 95: This value is not used.
| 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.
| OUT_STROKE_PRECIS
| Windows NT: This value is not used by the font mapper, but it is returned when TrueType,
other outline-based fonts, and vector fonts are enumerated.
Windows 95: This value is used to map vector fonts, and is returned when TrueType or
vector fonts are enumerated.
| OUT_TT_ONLY_PRECIS
| Instructs the font mapper to choose from only TrueType fonts. If there are no
TrueType fonts installed in the system, the font mapper returns to default
behavior.
| OUT_TT_PRECIS
| Instructs the font mapper to choose a TrueType font when the system contains
multiple fonts with the same name.
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Applications can use the OUT_DEVICE_PRECIS, OUT_RASTER_PRECIS, and
OUT_TT_PRECIS values to control how the font mapper chooses a font when the operating
system contains more than one font with a specified name. For example, if an
operating system contains a font named Symbol in raster and TrueType form, specifying
OUT_TT_PRECIS forces the font mapper to choose the TrueType version.
Specifying OUT_TT_ONLY_PRECIS forces the font mapper to choose a TrueType font, even if
it must substitute a TrueType font of another name.
fdwClipPrecision
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
| Meaning
| 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.
Windows NT: For compatibility, this value is always returned when enumerating fonts.
| CLIP_MASK
| Not used.
| CLIP_EMBEDDED
| You must specify this flag to use an embedded read-only font.
| CLIP_LH_ANGLES
| When this value is used, the rotation for all fonts depends on whether the
orientation of the coordinate system is left-handed or right-handed.
If not used, device fonts always rotate counterclockwise, but the rotation of
other fonts is dependent on the orientation of the coordinate system.
For more information about the orientation of coordinate systems, see the
description of the nOrientation parameter
| CLIP_TT_ALWAYS
| Not used.
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fdwQuality
Specifies the output quality. The output quality defines how carefully 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
| Meaning
| DEFAULT_QUALITY
| Appearance of the font does not matter.
| DRAFT_QUALITY
| Appearance of the font is less important than when the PROOF_QUALITY value is
used. 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.
| PROOF_QUALITY
| Character quality of the font is more important than exact matching of the
logical-font attributes. For GDI raster fonts, scaling is disabled and the font
closest in size is chosen. Although the chosen font size may not be mapped
exactly when PROOF_QUALITY is used, the quality of the font is high and there is no
distortion of appearance. Bold, italic, underline, and strikeout fonts are
synthesized if necessary.
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fdwPitchAndFamily
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
The four high-order bits specify the font family and can be one of the
following values:
Value
| Description
| FF_DECORATIVE
| Novelty fonts. Old English is an example.
| FF_DONTCARE
| Don't care or don't know.
| FF_MODERN
| Fonts with constant stroke width, with or without serifs. Pica, Elite, and
Courier New® are examples.
| FF_ROMAN
| Fonts with variable stroke width and with serifs. MS® Serif is an example.
| FF_SCRIPT
| Fonts designed to look like handwriting. Script and Cursive are examples.
| FF_SWISS
| Fonts with variable stroke width and without serifs. MS Sans Serif is an
example.
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An application can specify a value for the fdwPitchAndFamily parameter by using the Boolean OR operator to join a pitch constant with a
family constant.
Font families describe the look of a font in a general way. They are intended
for specifying fonts when the exact typeface requested is not available.
lpszFace
Points to a null-terminated string that specifies the typeface name of the
font. The length of this string must not exceed 32 characters, including the null
terminator. The EnumFontFamilies function can be used to enumerate the typeface names of all currently
available fonts.
If lpszFace is NULL or points to an empty string, GDI uses the first font that matches
the other specified attributes.
Return Values
If the function succeeds, the return value is a handle to a logical font.
If the function fails, the return value is NULL. To get extended error
information, call GetLastError.
Remarks
When you no longer need the font, call the DeleteObject function to delete it.
To help protect the copyrights of vendors who provide fonts for Windows
operating systems, applications should always report the exact name of a selected
font. Because available fonts can vary from system to system, do not assume that
the selected font is always the same as the requested font. For example, if you
request a font named "Palatino," but no such font is available on the system,
the font mapper will substitute a font that has similar attributes but a
different name. Always report the name of the selected font to the user.
See Also
DeleteObject, SelectObject, EnumFontFamilies
Related Links
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