/usr/share/doc/libfreetype6/index.html is in libfreetype6-dev 2.6.1-0.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=utf-8">
<meta http-equiv="Content-Style-Type"
content="text/css">
<meta http-equiv="Content-Script-Type"
content="text/javascript">
<meta name="description"
content="FreeType Overview">
<link rel="icon"
href="image/favicon_-60.ico">
<link rel="shortcut icon"
href="image/favicon_-60.ico">
<link rel="stylesheet"
type="text/css"
href="css/freetype2_-60.css">
<script type="text/javascript"
src="javascript/jquery-1.11.0.min.js">
</script>
<script type="text/javascript"
src="javascript/jquery.ba-resize.min.js">
</script>
<script type="text/javascript"
src="javascript/freetype2.js">
</script>
<title>FreeType Overview</title>
</head>
<body>
<div id="top"
class="bar">
<h1><a href="http://freetype.org/index.html">FreeType</a> Overview</h1>
</div>
<div id="wrapper">
<div class="colmask leftmenu">
<div class="colright">
<div class="col1wrap">
<div class="col1">
<!-- ************************************************** -->
<div id="what-is-freetype">
<h2>What is FreeType?</h2>
<p>FreeType is a software font engine that is designed to
be small, efficient, highly customizable, and portable
while capable of producing high-quality output (glyph
images). It can be used in graphics libraries, display
servers, font conversion tools, text image generation
tools, and many other products as well.</p>
<p>Note that FreeType is a <em>font service</em> and doesn't
provide APIs to perform higher-level features like text
layout or graphics processing (e.g., colored text
rendering, ‘hollowing’, etc.). However, it
greatly simplifies these tasks by providing a simple, easy
to use, and uniform interface to access the content of
font files.</p>
<p>FreeType is released under two open-source licenses: our
own
BSD-like <a href="http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/FTL.TXT">FreeType
License</a> and
the <a href="http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/GPLv2.TXT">GNU
Public License, Version 2</a>. It can thus be used
by any kind of projects, be they proprietary or not.</p>
<p>Please note that ‘FreeType’ is also called
‘FreeType 2’, to distinguish it from the
old, deprecated ‘FreeType 1’ library, a
predecessor no longer maintained and supported.</p>
</div>
<!-- ************************************************** -->
<div id="features">
<h2>Features</h2>
<p>The following is a non-exhaustive list of features
provided by FreeType.</p>
<ul>
<li>
<p>FreeType provides a simple and easy-to-use API to
access font content in a uniform way, independently of
the file format. Additionally, some format-specific
APIs can be used to access special data in the font
file.</p>
</li>
<li>
<p>The design of FreeType is based on modules that can
be either linked statically to the library at compile
time, or loaded on demand at runtime. Modules are
used to support specific font formats, or even new
glyph image formats!</p>
</li>
<li>
<p>FreeType was written with embedded systems in mind.
This means that it doesn't use static writable data
(i.e., it can be run from ROM directly), and that
client applications can provide their own memory
manager and I/O stream implementation. The latter
allows you to easily read from ROM-based, compressed
or remote font files with the same API. Several
stream implementations can be used concurrently with a
single FreeType instance.</p>
<p>You can also reduce the size of the FreeType code by
only compiling the modules you need for your embedded
project or environment.</p>
</li>
<li>
<p>By default, FreeType supports the following font
formats.</p>
<ul>
<li>TrueType fonts (TTF) and TrueType collections
(TTC)</li>
<li>CFF fonts</li>
<li>WOFF fonts</li>
<li>OpenType fonts (OTF, both TrueType and CFF
variants) and OpenType collections (OTC)</li>
<li>Type 1 fonts (PFA and PFB)</li>
<li>CID-keyed Type 1 fonts</li>
<li>SFNT-based bitmap fonts, including color Emoji</li>
<li>X11 PCF fonts</li>
<li>Windows FNT fonts</li>
<li>BDF fonts (including anti-aliased ones)</li>
<li>PFR fonts</li>
<li>Type 42 fonts (limited support)</li>
</ul>
</li>
<li>
<p>From a given glyph outline, FreeType is capable of
producing a high-quality monochrome bitmap, or
anti-aliased pixmap, using 256 levels of
‘gray’.</p>
</li>
<li>
<p>FreeType supports all the character mappings defined
by the TrueType and OpenType specifications. It is
also capable of automatically synthetizing a Unicode
charmap from Type 1 fonts, avoiding painful
‘encoding translation’ problems common
with this format (of course, original encodings are
also available if necessary).</p>
</li>
<li>
<p>The FreeType core API provides simple functions to
access advanced information like glyph names or basic
kerning data.</p>
</li>
<li>
<p>A full-featured and efficient TrueType bytecode
interpreter, trying to match the results of the
Windows bytecode engine. There is also the
possibility to activate subpixel hinting
(a.k.a. <em>ClearType</em>, still under
development).</p>
</li>
<li>
<p>For those who don't need or want to use the bytecode
interpreter for TrueType fonts, we developed our
own <em>automatic hinter</em> module. It is also used
by other scalable formats.</p>
</li>
<li>
<p>Due to its modular design, it is easy to enhance the
library, providing additional format-specific
information through optional APIs (as an example, an
optional API is provided to retrieve SFNT tables from
TrueType and OpenType fonts).</p>
</li>
<li>
<p>FreeType provides its own caching subsystem. It can
be used to cache either face instances or glyph images
efficiently.</p>
</li>
<li>
<p>A bundle of demo programs demonstrate the usage of
FreeType; look for the
‘ft2demos-<i>x.x.x</i>’ archive (or
‘ftdmo<i>xxx</i>’ in case you are on a
Windows platform) at the locations
given <a href="http://freetype.org/download.html">here</a>.
‘<i>x.x.x</i>’ (or
‘<i>xxx</i>’) gives the version number,
for example ‘2.4.10’ or
‘2410’.</p>
</li>
</ul>
</div>
<!-- ************************************************** -->
<div id="requirements">
<h2>Requirements</h2>
<p>FreeType is written in industry-standard ANSI C and
should compile easily with any compliant C or C++
compiler. We have even taken great care to
eliminate <em>all warnings</em> when compiling with
popular compilers like gcc, Visual C++, and Borland
C++.</p>
<p>Apart from a standard ANSI C library, FreeType
doesn't have any external dependencies and can be compiled
and installed on its own on any kind of system. Some
modules <em>need</em> external libraries (e.g., for
handling fonts compressed with gzip or bz2), however, they
are optional and can be disabled.</p>
</div>
<!-- ************************************************** -->
<div id="patents">
<h2>Patent Issues</h2>
<p>All patents related to the TrueType bytecode interpreter
have expired since May 2010. Support for the still
patented ClearType color filtering model is disabled by
default.</p>
<p>More information regarding this topic is available at
our <a href="http://freetype.org/patents.html">patents page</a>.</p>
</div>
<!-- ************************************************** -->
<div class="updated">
<p>Last update: 7-Dec-2014</p>
</div>
</div>
</div>
<!-- ************************************************** -->
<div class="col2">
</div>
</div>
</div>
<!-- ************************************************** -->
<div id="TOC">
<ul>
<li class="funding">
<p><a href="https://pledgie.com/campaigns/24434">
<img alt="Click here to lend your support to the FreeType project and make a donation at pledgie.com!"
src="https://pledgie.com/campaigns/24434.png?skin_name=chrome"
border="0"
align="middle">
</a></p>
<p><a href="https://flattr.com/thing/421342/lemzwerg-on-Flattr"
target="_blank">
<img class="with-border"
src="http://api.flattr.com/button/flattr-badge-large.png"
alt="Flattr this"
title="Flattr this"
border="0"
align="middle">
</a></p>
</li>
<li class="primary">
<a href="http://freetype.org/index.html">Home</a>
</li>
<li class="primary">
<a href="http://freetype.org/index.html#news">News</a>
</li>
<li class="primary">
<a href="index.html" class="current">Overview</a>
</li>
<li class="primary">
<a href="documentation.html">Documentation</a>
</li>
<li class="primary">
<a href="http://freetype.org/developer.html">Development</a>
</li>
<li class="primary">
<a href="http://freetype.org/contact.html"
class="emphasis">Contact</a>
</li>
<li>
<!-- separate primary from secondary entries -->
</li>
<li class="secondary">
<a href="#what-is-freetype">What is FreeType?</a>
</li>
<li class="secondary">
<a href="#features">Features</a>
</li>
<li class="secondary">
<a href="#requirements">Requirements</a>
</li>
<li class="secondary">
<a href="#patents">Patents</a>
</li>
</ul>
</div>
</div> <!-- id="wrapper" -->
<div id="TOC-bottom">
</div>
</body>
</html>
|