notes.html

CSS lets learn this step by step...

<li>Old Style (2)
<li>Modern (3)
<li>Even Width (4)
<li>Expanded (5)
<li>Condensed (6)
<li>Very Expanded (7)
<li>Very Condensed (8)
<li>Monospaced (9)
</ul>

<dt>Contrast
<dd><ul><li>Any (0)
<li>No Fit (1)
<li>None (2)
<li>Very Low (3)
<li>Low (4)
<li>Medium Low (5)
<li>Medium (6)
<li>Medium High (7)
<li>High (8)
<li>Very High (9)
</ul>

<dt>Stroke Variation
<dd><ul><li>Any (0)
<li>No Fit (1)
<li>No Variation (2)
<li>Gradual/Diagonal (3)
<li>Gradual/Transitional (4)
<li>Gradual/Vertical (5)
<li>Gradual/Horizontal (6)
<li>Rapid/Vertical (7)
<li>Rapid/Horizontal (8)
<li>Instant/Horizontal (9)
<li>Instant/Vertical (10)
</ul>

<dt>Arm Style
<dd><ul><li>Any (0)
<li>No Fit (1)
<li>Straight Arms/Horizontal (2)
<li>Straight Arms/Wedge (3)
<li>Straight Arms/Vertical (4)
<li>Straight Arms/Single Serif (5)
<li>Straight Arms/Double Serif (6)
<li>Non-Straight Arms/Horizontal (7)
<li>Non-Straight Arms/Wedge (8)
<li>Non-Straight Arms/Vertical 90)
<li>Non-Straight Arms/Single Serif (10)
<li>Non-Straight Arms/Double Serif (11)
</ul>


<dt>Letterform
<dd>
<ul><li>Any (0)
<li>No Fit (1)
<li>Normal/Contact (2)
<li>Normal/Weighted (3)
<li>Normal/Boxed (4)
<li>Normal/Flattened (5)
<li>Normal/Rounded (6)
<li>Normal/Off Center (7)
<li>Normal/Square (8)
<li>Oblique/Contact (9)
<li>Oblique/Weighted (10)
<li>Oblique/Boxed (11)
<li>Oblique/Flattened (12)
<li>Oblique/Rounded (13)
<li>Oblique/Off Center (14)
<li>Oblique/Square (15)
</ul>

<dt>Midline
<dd>
<ul><li>Any (0)
<li>No Fit (1)
<li>Standard/Trimmed (2)
<li>Standard/Pointed (3)
<li>Standard/Serifed (4)
<li>High/Trimmed (5)
<li>High/Pointed (6)
<li>High/Serifed (7)
<li>Constant/Trimmed (8)
<li>Constant/Pointed (9)
<li>Constant/Serifed (10)
<li>Low/Trimmed (11)
<li>Low/Pointed (12)
<li>Low/Serifed (13)
</ul>

<dt>XHeight
<dd><ul><li>Any (0)
<li>No Fit (1)
<li>Constant/Small (2)
<li>Constant/Standard (3)
<li>Constant/Large (4)
<li>Ducking/Small (5)
<li>Ducking/Standard (6)
<li>Ducking/Large (7)
</ul>
</dl>

<p><em>Panose-2</em> (see <a href="refs.html#ref-PANOSE2" rel="biblioentry" class="noxref"><span class="informref">[PANOSE2]</span></a>) is a specification for a
more comprehensive font classification and matching technology which
is not limited to Latin typefaces. For example, the serif
characteristics of a Latin face may be compared with the stroke
terminations of a Kanji face.

<p><img src="./images/P2F24.gif" alt="Illustration of Panose-2"></p>

<p>The Panose-2 value is not stored inside any known font formats, but
may be measured.

<h2>C.4 <a name="truetype-unicode">Deducing Unicode Ranges for TrueType</a></h2>

<P>This information is available in the font by looking at the
'ulUnicodeRange' bits in the 'OS/2' table (if it has one), which holds
a bitfield representation of the set. This table is defined in
revision 1.66 of the TrueType specification, from
Microsoft. Considering this information as a set, each element
corresponds to a Unicode 1.1 character block, and the presence of that
element in the set indicates that the font has one or more glyph
representations to represent at least one character in that block. The
set has 128 elements as described below. The order generally follows
that in the Unicode 1.1 standard. This table may be used to convert
the information in a TrueType font into a CSS 'unicode-range'
descriptor.

<table>
<thead>
<tr><th colspan="4"><hr>
<tr><th>Block<th>Add<th>Block name<th>Unicode range
<tr><th colspan="4"><hr>
</thead>
<tr><td>0<td>1<td>Basic Latin<td>U+0-7F
<tr><td>1<td>2<td>Latin-1 Supplement<td>U+80-FF
<tr><td>2<td>4<td>Latin-1 Extended-A<td>U+100-17F
<tr><td>3<td>8<td>Latin Extended-B<td>U+180-24F
<tr><th colspan="4"><hr>
<tr><td>4<td>1<td>IPA Extensions<td>U+250-2AF
<tr><td>5<td>2<td>Spacing Modifier Letters<td>U+2B0-2FF
<tr><td>6<td>4<td>Combining Diacritical Marks<td>U+300-36F
<tr><td>7<td>8<td>Greek<td>U+370-3CF
<tr><th colspan="4"><hr>
<tr><td>8<td>1<td><i>Greek Symbols and Coptic</i><td>U+3D0-3EF
<tr><td>9<td>2<td>Cyrillic<td>U+400-4FF
<tr><td>10<td>4<td>Armenian<td>U+530-58F
<tr><td>11<td>8<td>Hebrew<td>U+590-5FF
<tr><th colspan="4"><hr>
<tr><td>12<td>1<td><i>Hebrew Extended-A<br>Hebrew Extended-B</i><td>?? what ranges ??
<tr><td>13<td>2<td>Arabic<td>U+600-69F
<tr><td>14<td>4<td><i>Arabic Extended</i><td>U+670-6FF
<tr><td>15<td>8<td>Devanagari<td>U+900-97F
<tr><th colspan="4"><hr>
<tr><td>16<td>1<td>Bengali<td>U+980-9FF
<tr><td>17<td>2<td>Gurmukhi<td>U+A00-A7F
<tr><td>18<td>4<td>Gujarati<td>U+A80-AFF
<tr><td>19<td>8<td>Oriya<td>U+B00-B7F
<tr><th colspan="4"><hr>
<tr><td>20<td>1<td>Tamil<td>U+B80-BFF
<tr><td>21<td>2<td>Telugu<td>U+C00-C7F
<tr><td>22<td>4<td>Kannada<td>U+C80-CFF
<tr><td>23<td>8<td>Malayalam<td>U+D00-D7F
<tr><th colspan="4"><hr>
<tr><td>24<td>1<td>Thai<td>U+E00-E7F
<tr><td>25<td>2<td>Lao<td>U+E80-EFF

<tr><td>26<td>4<td>Georgian<td>U+10A0-10EF
<tr><td>27<td>8<td><i>Georgian Extended</i><td>U+10F0-10FF ??
<tr><th colspan="4"><hr>
<tr><td>28<td>1<td>Hangul Jamo<td>U+1100-11FF
<tr><td>29<td>2<td>Latin Extended Additional<td>-
<tr><td>30<td>4<td>Greek Extended<td>U+1F00-1FFF
<tr><td>31<td>8<td>General Punctuation<td>U+2000-206F
<tr><th colspan="4"><hr>
<tr><td>32<td>1<td>Superscripts and Subscripts<td>-
<tr><td>33<td>2<td>Currency Symbols<td>U+20A0-20CF
<tr><td>34<td>4<td>Combining Marks for Symbols<td>U+20D0-20FF
<tr><td>35<td>8<td>Letterlike Symbols<td>U+2100-214F
<tr><th colspan="4"><hr>
<tr><td>36<td>1<td>Number Forms<td>U+2150-218F
<tr><td>37<td>2<td>Arrows<td>U+2190-21FF
<tr><td>38<td>4<td>Mathematical Operators<td>U+2200-22FF
<tr><td>39<td>8<td>Miscellaneous Technical<td>U+2300-23FF
<tr><th colspan="4"><hr>
<tr><td>40<td>1<td>Control Pictures<td>U+2400-243F
<tr><td>41<td>2<td>Optical Character Recognition<td>U+2440-245F
<tr><td>42<td>4<td>Enclosed Alphanumerics<td>U+2460-24FF
<tr><td>43<td>8<td>Box Drawing<td>U+2500-257F
<tr><th colspan="4"><hr>
<tr><td>44<td>1<td>Block Elements<td>U+2580-259F
<tr><td>45<td>2<td>Geometric Shapes<td>U+25A0-25FF
<tr><td>46<td>4<td>Miscellaneous Symbols<td>U+2600-26FF
<tr><td>47<td>8<td>Dingbats<td>U+2700-27BF
<tr><th colspan="4"><hr>
<tr><td>48<td>1<td>CJK Symbols and Punctuation<td>U+3000-303F
<tr><td>49<td>2<td>Hiragana<td>U+3040-309F
<tr><td>50<td>4<td>Katakana<td>U+30A0-30FF
<tr><td>51<td>8<td>Bopomofo<td>U+3100-312F
<tr><th colspan="4"><hr>
<tr><td>52<td>1<td>Hangul Compatibility Jamo<td>U+3130-318F

<tr><td>53<td>2<td>CJK Miscellaneous<td>??
<tr><td>54<td>4<td>Enclosed CJK Letters and Months<td>U+3200-32FF
<tr><td>55<td>8<td>CJK compatibility<td>U+3300-33FF
<tr><th colspan="4"><hr>
<tr><td>56<td>1<td>Hangul<td>U+AC00-D7FF

<tr><td>59<td>8<td>CJK Unified Ideographs<td>U+4E00-9FFF
<tr><th colspan="4"><hr>

<tr><td>60<td>1<td>Private Use Area<td>U+E000-F8FF
<tr><td>61<td>2<td>CJK Compatibility Ideographs<td>U+F900-FAFF
<tr><td>62<td>4<td>Alphabetic Presentation Forms<td>U+FB00-FB4F
<tr><td>63<td>8<td>Arabic Presentation Forms-A<td>U+FB50-FDFF
<tr><th colspan="4"><hr>
<tr><td>64<td>1<td>Combining Half Marks<td>U+FE20-FE2F
<tr><td>65<td>2<td>CJK compatibility Forms<td>U+FE30-FE4F
<tr><td>66<td>4<td>Small Form Variants<td>U+FE50-FE6F
<tr><td>67<td>8<td>Arabic Presentation Forms-B<td>U+FE70-FEFF
<tr><th colspan="4"><hr>
<tr><td>68<td>1<td>Halfwidth and Fullwidth Forms<td>U+FF00-FFEF
<tr><td>69<td>2<td>Specials<td>U+FFF0-FFFD


</table>

<p class=comment>The TrueType bitfield system has the problem that it
is tied to Unicode 1.1 and is unable to cope with Unicode expansion -
it is unable to represent Tibetan for example, or other scripts introduced with Unicode 2.0 or later revisions.

<h2>C.5 <a name="autodescgen">Automatic descriptor generation</a></h2>

<p>Authoring tools should allow style sheet authors to add and edit font descriptors. In some cases, however, authoring tools can help by examining locally installed fonts and automatically generating descriptors for fonts referenced in the style sheet. This is also a function that can be carried out by tools which subset or convert fonts ready for dynamic download.

<p>This table suggests where such information can be found, for common font formats.</p>

<table border>


<tr><td>Descriptor<td>Type 1<td>TrueType and OpenType<td>TrueType GX <a href="refs.html#ref-TRUETYPEGX" rel="biblioentry" class="noxref"><span class="informref">[TRUETYPEGX]</span></a></tr>

<tr><td><a href="fonts.html#descdef-ascent" class="noxref"><span class="descinst-ascent">'ascent'</span></a>
<td><tt>'Ascender'</tt> in AFM/PFM file<td><tt>'Ascender'</tt> in
<tt>'hhea'</tt> table or (preferably)
	<tt>'sTypoAscender'</tt> in <tt>'OS/2'</tt> table<td><tt>'horizontalBefore'</tt> in <tt>'fmtx'</tt> table


<tr><td><a href="fonts.html#descdef-baseline" class="noxref"><span class="descinst-baseline">'baseline'</span></a>
<td>&nbsp;<td>&nbsp;<td><tt>bsln</tt> table, see <a href="#bsln">note</a>

<tr><td><a href="fonts.html#descdef-bbox" class="noxref"><span class="descinst-bbox">'bbox'</span></a>
<td><tt>FontBBox</tt>, font dictionary<td><tt>'xMin'</tt>, <tt>'xMax'</tt>, <tt>'yMin'</tt> and <tt>'yMax'</tt>
entries of the <tt>'head'</tt> table
<td>&nbsp;

<tr><td><a href="fonts.html#descdef-cap-height" class="noxref"><span class="descinst-cap-height">'cap-height'</span></a>
<td><tt>CapHeight</tt> in AFM/PFM file<td>&nbsp;<td>&nbsp;

<tr><td><a href="fonts.html#descdef-descent" class="noxref"><span class="descinst-descent">'descent'</span></a>
<td><tt>'Descender'</tt> in the AFM/PFM file.<td>&nbsp;<td>&nbsp;

<tr><td><a href="fonts.html#descdef-mathline" class="noxref"><span class="descinst-mathline">'mathline'</span></a>
<td>&nbsp;<td>&nbsp;<td><tt>bsln</tt> table

<tr><td><a href="fonts.html#descdef-font-family" class="noxref"><span class="descinst-font-family">'font-family'</span></a>
<td><tt>FamilyName</tt>, fontinfo dictionary<td><tt>name</tt> table<td>&nbsp;

<tr><td><a href="fonts.html#descdef-stemh" class="noxref"><span class="descinst-stemh">'stemh'</span></a>
<td><tt>StdHW</tt>, private dictionary of AFM/PFM file<td>&nbsp;<td>&nbsp;

<tr><td><a href="fonts.html#descdef-stemv" class="noxref"><span class="descinst-stemv">'stemv'</span></a>
<td><tt>/StdVW</tt>, private dictionary<td><tt>cvt</tt> table<td>&nbsp;

<tr><td><a href="fonts.html#descdef-topline" class="noxref"><span class="descinst-topline">'topline'</span></a>
<td>&nbsp;<td>&nbsp;<td><tt>bsln</tt> table

<tr><td><a href="fonts.html#descdef-unicode-range" class="noxref"><span class="descinst-unicode-range">'unicode-range'</span></a>
<td>cmap file<td><tt>OS/2</tt> table, see <a href="#truetype-unicode">Appendix C</a><td>&nbsp;

<tr><td><a href="fonts.html#descdef-units-per-em" class="noxref"><span class="descinst-units-per-em">'units-per-em'</span></a>
<td><tt>FontMatrix</tt>, font dictionary<td><tt>unitsPerEm</tt>, <tt>head</tt> table.<td>&nbsp;

<tr><td><a href="fonts.html#descdef-widths" class="noxref"><span class="descinst-widths">'widths'</span></a>
<td>&nbsp;<td><tt>hmtx</tt> table<td>&nbsp;

</table>

<ul><li><a name="bsln">Within the <tt>bsln</tt></a> table, the
<tt>ideographic centered baseline</tt> may be used for stretches of
predominantly ideographic characters and the <tt>ideographic low
baseline</tt> is more suitable for ideographic characters in a run of
predominantly Latin, Greek or Cyrillic characters.
</ul>

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