Where scalable_width is 500 in this example, and resolution is 75 dpi for this font. Pixels = (scalable_width / 1000) * (resolution / 72), The scalable width is 1000 times the actual point size of the character-the same unit used in an Adobe Font Metric (AFM) file. This will result in an X-axis offset to the next glyph, but no Y-axis offset to the next glyph (i.e., the glyphs appear straight across in a line).
"SWIDTH 500 0" declares the Scalable Width of 500 on the X-axis and 0 (default) on the Y-axis.
Laughter font glyphs code#
"ENCODING 65" declares the decimal code point for this glyph in the font. In version 2.2, the glyph name string can contain up to 65,535 characters. In version 2.1 and earlier, the character name string was limited to 14 characters. The string name of this particular character is "U+0041", expressing in the Unicode convention the code point hexadecimal 41 (decimal 65, the ASCII character "A"). "STARTCHAR U+0041" specifies the start of a character in version 2.1 and earlier, or of a glyph in version 2.2. Anything following the "COMMENT" keyword on a line is ignored.įollowing the above global declarations, the following entries may repeat for each glyph. Lines beginning with the word "COMMENT" can be inserted within a BDF file. Although Adobe now refers to this file format as the Glyph BDF, they have retained the keyword "CHARS" in the final version of the specification. "CHARS 1" declares that one character will follow. "ENDPROPERTIES" appears at the end of the "STARTPROPERTIES" section. "FONT_DESCENT 2" declares that 2 of the 16 pixels in height are below the baseline. "FONT_ASCENT 14" declares that 14 of the 16 pixels in height are above the baseline.
X Window allows the properties FONT_ASCENT and FONT_DESCENT to show the height above and below the baseline, respectively, for all glyphs. "STARTPROPERTIES" is optional in the BDF specification. "STARTPROPERTIES 2" declares that two special properties will follow. The "A" glyph, for example, is only 8 pixels wide. Note that although the bounding box is defined to be a 16 by 16 cell, this can be overridden for individual glyphs. "FONTBOUNDINGBOX 16 16 0 -2" defines a bounding box for the font of 16 pixels wide by 16 pixels high, with the lower left-hand corner starting at x=0, y=-2. "SIZE 16 75 75" defines this to be a 16 point font, with an X-axis resolution of 75 dots per inch (dpi) and a Y-axis resolution of 75 dpi. "FONT -gnu-unifont-medium-r-normal-16-160-75-75-c-80-iso10646-1" defines the font family and face names as an X logical font description. "STARTFONT 2.1" defines the version of this BDF file as version 2.1. In the above example, the global declarations begin with the "STARTFONT" line and end with the "CHARS" line. This is an example font containing one glyph, for ASCII capital 'A'.
For example, glyphs in a BDF 2.2 font definition can specify rendering from top-to-bottom rather than simply left-to-right. Version 2.2 added support for non-Western writing.
Laughter font glyphs windows#
In 1988, the X Consortium adopted BDF 2.1 as a standard for X Window screen fonts, but X Windows has largely moved to other font standards such as PCF, Opentype, and Truetype. Earlier versions were referred to as the Character Bitmap Distribution Format. As of 2013 the current version of BDF is 2.2.
0 kommentar(er)
