This section provides detailed information about the contents
of the buffer returned by the vqt_fontheader() call.
First, here are some general notes about the values you will be
using:
All integers are signed (unless otherwise noted) and in
Big-Endian format (most significant byte first).
|
Offset
|
Field |
Meaning |
|
0
|
Format Identifier |
An 8-byte character string consisting of
"D1.0" CR LF NULL NULL |
|
8
|
Font Size |
A LONG specifying the size of the
font file in bytes. |
|
12
|
Minimum Font Buffer Size |
A LONG specifying the minimum size
buffer required to load the non-image data of the
font. |
|
16
|
Minimum Character Buffer Size |
A WORD specifying the minimum size
buffer required to hold the largest character in the
font. |
|
18
|
Header Size |
A WORD specifying the size of the
font header. |
|
20
|
Font ID |
A WORD containing the Bitstream
font ID number. |
|
22
|
Font Version Number |
A WORD containing the font revision
number. |
|
24
|
Font Full Name |
A 70-byte character string containing the
full name of the font. |
|
94
|
Manufacturing Date |
A 10-byte character string containing the
manufacturing date of the font as DD Mon YY. |
|
104
|
Character Set Name |
A 66-byte character string containing the
name of the character set used for the font (ex: "Bitstream International Character
Set"). |
|
170
|
Vendor ID |
A 2-byte character string identifying the
manufacturer of the font. This is usually the first two
characters in the font filename. Bitstream fonts use
'BX'. |
|
172
|
Character Set ID |
A 2-byte character string identifying the
character set used for this font. This is usually the second
2 characters in the font filename. The Bitstream
International Character Set is '00'. |
|
174
|
Copyright Notice |
A 78-byte character string containing the
copyright notice for the font. |
|
252
|
Number of Character Indexes in Character
Set |
A WORD specifying the number of
character indexes available in the font's character set. This
does not necessarily mean that every index is actually
used. |
|
254
|
Total Number of Character Indexes in
Font |
A WORD indicating the number of
character indexes available in the font's character set in
addition to any supplementary characters needed to create
compound characters. |
|
256
|
Index of First Character |
A WORD containing the first
available character in a font. |
|
258
|
Number of Kerning Tracks |
A WORD specifying the total number
of kerning tracks. |
|
260
|
Number of Kerning Pairs |
A WORD specifying the total number
of kerning pairs. |
|
262
|
Font Flags |
Bit 0 of this BYTE is set to
indicate extended mode. Extended mode fonts require a higher
quality of font rendering (such as chess pieces). If Bit 0 is
clear, the font is in Compact mode (the default). Bits 1-7
are currently reserved. |
|
263
|
Classification Flags |
A BYTE value whose bits indicate the
font classification as follows: Bit
Meaning
0 Italic
1 Monospace
2 Serif
3 Display
4-7 Reserved
|
|
264
|
Family Classification |
A BYTE indicating the family
classification of the font as follows: Value
Meaning
0 Don't Care
1 Serif
2 Sans Serif
3 Monospace
4 Script
5 Decorative
|
|
265
|
Font Form Classification |
A BYTE classifying the width and
weight of characters in the font as follows: Bits 0-3
Meaning
0-3 (Reserved)
4 Condensed
5 (Reserved for ¾ condensed)
6 Semi-Condensed
7 (Reserved for ¼ condensed)
8 Normal
9 (Reserved for ¾ expanded)
10 Semi-Expanded
11 (Reserved for ¼ expanded)
12 Expanded
13-15 (Reserved)
Bits 4-7 Meaning
0 (Reserved)
1 Thin
2 Ultralight
3 Extralight
4 Light
5 Book
6 Normal
7 Medium
8 Semibold
9 Demibold
10 Bold
11 Extrabold
12 Ultrabold
13 Heavy
14 Black
15 (Reserved)
|
|
266
|
Short Font Name |
A 32-byte character string containing the
abbreviation of the name of the Postscript compatible
font. |
|
298
|
Short Face Name |
A 16-byte character string containing the
abbreviation of the typeface family name. |
|
314
|
Font Form |
A 14-byte character string containing the
font form classification (as above). |
|
328
|
Italic Angle |
A WORD indicating the number of
1/256 degrees that characters are slanted
clockwise. |
|
330
|
ORUs per Em |
A WORD indicating the number of
Outline Resolution Units (ORUs) per Em. |
|
332
|
Width of Word Space |
A WORD value which expresses the
width of a 'word space' (i.e. ASCII 32) in ORUs. |
|
334
|
Width of Em Space |
A WORD value which expresses the
width of Em space in ORUs (this is not always the same as the
number of ORUs in the letter 'M'). |
|
336
|
Width of En Space |
A WORD value which expresses the
width of En space in ORUs. This is always half the width of
Em space (not the width of the letter 'N'). |
|
338
|
Width of Thin Space |
A WORD value which expresses the
width of 'thin space' in ORUs. This is the width applied
between two words and is normally the same as 'word
space'. |
|
340
|
Width of Figure Space |
A WORD value which expresses the
width of 'figure space' in ORUs. This is the width of tabular
characters in the font. |
|
342
|
XMIN (Min X coordinate in
font) |
A WORD indicating the minimum X
coordinate used in the font.
|
|
344
|
YMIN (Min Y coordinate in
font) |
A WORD indicating the minimum Y
coordinate used in the font. |
|
346
|
XMAX (Max X coordinate in
font) |
A WORD indicating the maximum X
coordinate used in the font. |
|
348
|
YMAX (Max Y coordinate in
font) |
A WORD indicating the maximum Y
coordinate used in the font. |
|
350
|
Underline Position |
A WORD value indicating the
distance the center of an underline should be applied from
the baseline of the font. |
|
352
|
Underline Thickness |
A WORD value indicating the
thickness an underline applied to this font should be (in
ORUs). |
|
354
|
Small Caps |
A 6-byte Transformation Parameter used for
small capitals (eg: abcdefg). |
|
360
|
Display Superiors |
A 6-byte Transformation Parameter used for
display superiors (eg: $350). |
|
366
|
Footnote Superiors |
A 6-byte Transformation Parameter used for
footnote superiors (eg: see footnote1). |
|
372
|
Alpha Superiors |
A 6-byte Transformation Parameter used for
alpha superiors (eg: Sra). |
|
378
|
Chemical Inferiors |
A 6-byte Transformation Parameter used for
chemical inferiors (eg: H20). |
|
384
|
Small Numerators |
A 6-byte Transformation Parameter used for
small numerators (eg: ). |
|
390
|
Small Denominators |
A 6-byte Transformation Parameter used for
small denominators (see above). |
|
396
|
Medium Numerators |
A 6-byte Transformation Parameter used for
medium numerators (eg: ). |
|
402
|
Medium Denominators |
A 6-byte Transformation Parameter used for
medium denominators (see above). |
|
408
|
Large Numerators |
A 6-byte Transformation Parameter used for
large numerators (eg: ). |
|
414
|
Large Denominators |
A 6-byte Transformation Parameter used for
large denominators (see above). |
