1 Version 1.4.(2015-XXX-XX)
2 -------------------------
4 * Support for the Thai script.
7 Version 1.3 (2015-Jan-06)
8 -------------------------
10 * Keywords in control instruction files can be more verbose to increase
11 readability. You can now use `left`, `right`, `nodir`, `point`, `touch`,
12 `xshift`, and `yshift` for `l`, `r`, `n`, `p`, `t, `x`, and `y`,
15 * A new control instruction keyword `touch` was added to apply delta
16 instructions before the final IUP bytecode commands, also `touching' the
17 affected points (to use the TrueType instructions terminology). Such
18 deltas *do* work even with ClearType if applied to the non-ClearType
21 * Support for the Telugu script.
23 * The amount of information about ttfautohint and its parameters that gets
24 added to the `name` table by default has been reduced. A new option
25 `--detailed-info` restores the previous behaviour.
27 * ttfautohintGUI crashed if not used with a control instruction file.
29 * ttfautohintGUI now correctly switches to a horizontal two-column layout if
30 the standard one-column layout would exceed the screen height.
32 * A new option `--family-suffix` makes it possible to append a suffix to a
33 font's family name in the `name` table. This can be useful during the
34 development process: It helps the operating system to simultaneously
35 display several instances of a font that are processed with different
36 ttfautohint parameters.
38 * The new library option `info-post-callback` helps in processing data from
42 Version 1.2 (2014-Oct-06)
43 -------------------------
45 * It is now possible to control the hinting process at a very low level
46 using a 'control instructions' file. Right now, two modes are supported:
48 - Adding segments and changing segment directions.
50 - Applying delta exceptions. Note that this doesn't really work in
53 Please see the documentation for a description and a small tutorial.
55 In the TTY front-end, use option `--control-file` to load such a file.
57 * Support for input file watching in ttfautohintGUI: If the 'Watch Input
58 File' box is checked, the program automatically regenerates the output
59 file as soon as the input font or control instructions file gets modified.
61 The idea is to dock ttfautohintGUI to your favourite font and text editor
62 instead of adding a cheap text editor to ttfautohintGUI itself.
64 * With the new option `--fallback-stem-width` it is now possible to set a
65 default stem width for all scripts that lack proper standard characters in
68 * Add alias `--adjust-subglyphs` for option `--pre-hinting` to better
69 describe its functionality. The short form `-p` stays unchanged.
71 * New option `--ttfa-table` to add an SFNT table `TTFA` to the output font,
72 containing an ASCII dump of all used ttfautohint parameters (including
73 control instructions). Right now, this is mainly for archiving purposes.
74 Forthcoming versions of ttfautohint will be able to re-use this data if a
75 font gets re-processed.
77 * A harmless buglet was fixed that made the `glyf` table too large by one
78 byte under some circumstances.
80 * A bug fix taken from FreeType, correcting a crash for unusual outlines.
82 * Better handling of TTC files.
84 * New library options `error-callback` and `error-callback-data` for
85 improved diagnostics. [No change in the front-ends except better error
88 * Many other, minor fixes and improvements.
91 Version 1.1 (2014-May-05)
92 -------------------------
94 * Support for the Devanagari script.
96 * Bug fixes in the computation of strong stem widths. GDI hinting now gives
97 much more consistent results.
99 * Better recognition of script coverage: ttfautohint now properly scans
100 composite glyphs to cover components also.
102 * Improved glyph shape analysis: Non-flat local extrema are now recognized
103 more reliably, and stem detection works better.
106 Version 1.00 (2014-Mar-20)
107 --------------------------
109 * Much less memory consumption while handling fonts with complicated glyphs.
111 * Option `-s` was partially broken.
114 Version 1.00rc1 (2014-Feb-07)
115 -----------------------------
117 * OpenType feature support. ttfautohint now uses the HarfBuzz library to
118 analyze data from the `GSUB` table. This allows the hinting of glyphs
119 that don't have an entry in a font's `cmap` table, for example
120 superscripts or small caps.
122 Related to this, the new option `--default-script` controls the default
123 (fallback) script used for OpenType features.
125 * More than a single standard character is used. For example, the 'latin'
126 script uses characters 'o', 'O', and digit '0'. This improves the hinting
127 of fonts (and features) that have only a partial coverage of a script's
128 character repertoire.
130 * Much better GDI ClearType hinting in the range 30-80ppem (approx.),
131 avoiding overly flat tops and bottoms of round glyphs.
133 * Better handling of non-square pixels (this is, horizontal and vertical
134 resolutions differ) in the created TrueType bytecode.
137 Version 0.97 (2013-Nov-09)
138 --------------------------
140 * Improved script support. Besides Cyrillic and Greek, which are now
141 handled separately from Latin, ttfautohint can handle Hebrew.
143 * Option `-f` now takes a parameter to specify the fallback script. The
144 corresponding long option name has been renamed from `--latin-fallback` to
147 * Work around a bug in display environments that use FreeType 2.5.0 and
148 earlier for rendering: Sometimes, the 'strong' stem width routine was used
149 for DW ClearType (this is, subpixel hinting in FreeType is enabled) even
150 if 'smooth' was selected while generating the font with ttfautohint.
153 Version 0.96 (2013-Aug-06)
154 --------------------------
156 * Option `--components` has been replaced with `--composites`: By default,
157 the components of a composite glyph are now hinted separately, since tests
158 has shown that this gives good results in most cases. If this option is
159 set, however, the composite glyph itself gets hinted (and the hints of the
160 components are ignored).
162 An unfortunate side effect is that ttfautohint's option `-c` (which stays
163 as a shorthand for `--composites`) now does exactly the opposite as in
166 * Older versions of Monotype's 'iType' bytecode interpreter have a serious
167 bug: The DIV instruction rounds the result, while the correct operation is
168 truncation. This caused 'exploding characters' with fonts hinted by
169 ttfautohint. Since many printers contain this rasterizer without any
170 possibility to update to a non-buggy version, ttfautohint now contains
171 work-arounds to circumvent the problem.
173 * Better support for glyphs where some points have almost the same position
174 (for example glyph 'Oslash' in font 'Roboto-Thin').
176 * Better support for glyphs that use explicit 'on' points around round
180 Version 0.95 (2013-Mar-07)
181 --------------------------
183 * New option `--dehint` to strip off all hints without generating new hints.
184 This option is intended for testing purposes.
186 * Minor fixes to the created bytecode for compatibility.
188 * Minor GUI improvements.
191 Version 0.94 (2012-Nov-29)
192 --------------------------
194 * New option `--windows-compatibility` that adds two artificial blue zones
195 at vertical positions given by 'usWinAscent' and 'usWinDescent'. This
196 helps ttfautohint's hinting algorithm reduce the possibility of clipping
197 if those two values are very tight.
199 * Implement option `--x-height-snapping-exceptions`, making ttfautohint
200 avoid x-height snapping for selected PPEM values. Useful in combination
201 with `--windows-compatibility`.
203 * Minor fixes to the created bytecode for compatibility and robustness.
206 Version 0.93 (2012-Oct-09)
207 --------------------------
209 * New option `--components` to treat components of composite glyphs
210 separately. This greatly reduces the bytecode size.
212 I'm waiting for reports whether this option works for most fonts; in case
213 this is true I'm inverting the option, making it the default (and the old
216 * Full support of TTCs, this is, all subfonts get auto-hinted now.
218 * The upper limit of the `--increase-x-height` option has been removed.
220 * Drag-and-drop support in the GUI.
222 * The TTY version of ttfautohint now acts like a (Unix) filter, this is, it
223 accepts stdin and stdout as input and output, respectively.
225 * Less memory consumption.
228 Version 0.92 (2012-Aug-07)
229 --------------------------
231 * A serious bug in the created bytecode has been fixed, causing incorrect
235 Version 0.91 (2012-Jul-12)
236 --------------------------
238 * A new, 'strong' routine to handle stem widths and positions has been
239 added, to be selected with the `--strong-stem-width` command line option.
240 If it is active, stem widths and positions are snapped to the grid as much
241 as possible. This algorithm is useful for GDI ClearType support.
243 * A new command line option `--debug` (not available for ttfautohintGUI) to
244 print very detailed debugging information.
247 Version 0.9 (2012-Jun-06)
248 -------------------------
250 * The created bytecode has been reduced in size, making it approx. 20%
253 * New option `--symbol` to use standard stem height and width values instead
254 of using character 'o' (which may be missing). Use this option for symbol
255 fonts or math glyphs.
257 * More documentation (in text, HTML, and PDF format). It's still
260 * Option `--ignore-permissions` has been renamed to `--ignore-restrictions`.
261 The short form is still `-i`.
263 * Defaults for various parameters have been set to more sensible values:
265 - hinting-range-max: 50 (was 1000)
266 - hinting-limit: 200 (was 1000)
268 * Option `--increase-x-height` now has a mandatory argument (in the range
269 6-20 or value\ 0 to disable it, default value is 14).
272 Version 0.8 (2012-Mar-21)
273 -------------------------
275 * Implement option `-x` to increase the x height of the font for small PPEM
276 values by rounding up far more often then rounding down.
278 * Add option '`-G n`' to switch off hinting completely above value\ `n`.
280 * ttfautohint now appends version information and the used parameters to the
281 'Version' field(s) in the 'name' table. This can be suppressed with
285 Version 0.7 (2012-Feb-05)
286 -------------------------
288 * A GUI has been added, using the Qt framework. The binary is called
292 Version 0.6.1 (2012-Jan-02)
293 ---------------------------
295 * The improved handling of composite glyphs in 0.6 was buggy under certain
296 circumstances, making ttfautohint crash and FontValidator complain.
298 * Dropout handling has been activated.
301 Version 0.6 (2011-Dec-25)
302 -------------------------
304 * Improved handling of composite glyphs.
306 * Implement option `-p` to pre-hint glyphs with original hints before
307 conversion takes place.
309 * Don't add a `DSIG` table if there is none in the input font.
311 * Human-readable error messages instead of hexadecimal error codes.
313 * Better tests (both at runtime and compile time) to reject too old FreeType
317 Version 0.5 (2011-Nov-06)
318 -------------------------
320 * Rendering on iOS is now expected to give good results.
322 * No bad rendering at very large PPEM values.
325 Version 0.4 (2011-Oct-27)
326 -------------------------
328 * The bytecode has been changed to 'create' twilight points. This should
329 avoid rendering artifacts on some platforms.
332 Version 0.3 (2011-Sep-09)
333 -------------------------
335 * Fix font generation; sometimes the `glyf` table was one byte too short,
336 making the font invalid.
339 Version 0.2 (2011-Jul-19)
340 -------------------------
342 * Fix bytecode bugs that prevented correct rendering on some platforms.
345 Version 0.1 (2011-Jun-30)
346 -------------------------