1 New in Version 1.3 (XXXX-XXX-XX)
2 --------------------------------
4 * Keywords in control instruction files can be more verbose to increase
5 readability. You can now use `left`, `right`, `nodir`, `point`, `touch`,
6 `xshift`, and `yshift` for `l`, `r`, `n`, `p`, `t, `x`, and `y`,
9 * A new control instruction keyword `touch` was added to apply delta
10 instructions before the final IUP bytecode commands.
12 * Support for the Telugu script.
14 * ttfautohintGUI crashed if not used with a control instruction file.
17 New in Version 1.2 (2014-Oct-06)
18 --------------------------------
20 * It is now possible to control the hinting process at a very low level
21 using a 'control instructions' file. Right now, two modes are supported:
23 - Adding segments and changing segment directions.
25 - Applying delta exceptions. Note that this doesn't really work in
28 Please see the documentation for a description and a small tutorial.
30 In the TTY front-end, use option `--control-file` to load such a file.
32 * Support for input file watching in ttfautohintGUI: If the 'Watch Input
33 File' box is checked, the program automatically regenerates the output
34 file as soon as the input font or control instructions file gets modified.
36 The idea is to dock ttfautohintGUI to your favourite font and text editor
37 instead of adding a cheap text editor to ttfautohintGUI itself.
39 * With the new option `--fallback-stem-width` it is now possible to set a
40 default stem width for all scripts that lack proper standard characters in
43 * Add alias `--adjust-subglyphs` for option `--pre-hinting` to better
44 describe its functionality. The short form `-p` stays unchanged.
46 * New option `--ttfa-table` to add an SFNT table `TTFA` to the output font,
47 containing an ASCII dump of all used ttfautohint parameters (including
48 control instructions). Right now, this is mainly for archiving purposes.
49 Forthcoming versions of ttfautohint will be able to re-use this data if a
50 font gets re-processed.
52 * A harmless buglet was fixed that made the `glyf` table too large by one
53 byte under some circumstances.
55 * A bug fix taken from FreeType, correcting a crash for unusual outlines.
57 * Better handling of TTC files.
59 * New library options `error-callback` and `error-callback-data` for
60 improved diagnostics. [No change in the front-ends except better error
63 * Many other, minor fixes and improvements.
66 New in Version 1.1 (2014-May-05)
67 --------------------------------
69 * Support for the Devanagari script.
71 * Bug fixes in the computation of strong stem widths. GDI hinting now gives
72 much more consistent results.
74 * Better recognition of script coverage: ttfautohint now properly scans
75 composite glyphs to cover components also.
77 * Improved glyph shape analysis: Non-flat local extrema are now recognized
78 more reliably, and stem detection works better.
81 New in Version 1.00 (2014-Mar-20)
82 ---------------------------------
84 * Much less memory consumption while handling fonts with complicated glyphs.
86 * Option `-s` was partially broken.
89 New in Version 1.00rc1 (2014-Feb-07)
90 ------------------------------------
92 * OpenType feature support. ttfautohint now uses the HarfBuzz library to
93 analyze data from the `GSUB` table. This allows the hinting of glyphs
94 that don't have an entry in a font's `cmap` table, for example
95 superscripts or small caps.
97 Related to this, the new option `--default-script` controls the default
98 (fallback) script used for OpenType features.
100 * More than a single standard character is used. For example, the 'latin'
101 script uses characters 'o', 'O', and digit '0'. This improves the hinting
102 of fonts (and features) that have only a partial coverage of a script's
103 character repertoire.
105 * Much better GDI ClearType hinting in the range 30-80ppem (approx.),
106 avoiding overly flat tops and bottoms of round glyphs.
108 * Better handling of non-square pixels (this is, horizontal and vertical
109 resolutions differ) in the created TrueType bytecode.
112 New in Version 0.97 (2013-Nov-09)
113 ---------------------------------
115 * Improved script support. Besides Cyrillic and Greek, which are now
116 handled separately from Latin, ttfautohint can handle Hebrew.
118 * Option `-f` now takes a parameter to specify the fallback script. The
119 corresponding long option name has been renamed from `--latin-fallback` to
122 * Work around a bug in display environments that use FreeType 2.5.0 and
123 earlier for rendering: Sometimes, the 'strong' stem width routine was used
124 for DW ClearType (this is, subpixel hinting in FreeType is enabled) even
125 if 'smooth' was selected while generating the font with ttfautohint.
128 New in Version 0.96 (2013-Aug-06)
129 ---------------------------------
131 * Option `--components` has been replaced with `--composites`: By default,
132 the components of a composite glyph are now hinted separately, since tests
133 has shown that this gives good results in most cases. If this option is
134 set, however, the composite glyph itself gets hinted (and the hints of the
135 components are ignored).
137 An unfortunate side effect is that ttfautohint's option `-c` (which stays
138 as a shorthand for `--composites`) now does exactly the opposite as in
141 * Older versions of Monotype's 'iType' bytecode interpreter have a serious
142 bug: The DIV instruction rounds the result, while the correct operation is
143 truncation. This caused 'exploding characters' with fonts hinted by
144 ttfautohint. Since many printers contain this rasterizer without any
145 possibility to update to a non-buggy version, ttfautohint now contains
146 work-arounds to circumvent the problem.
148 * Better support for glyphs where some points have almost the same position
149 (for example glyph 'Oslash' in font 'Roboto-Thin').
151 * Better support for glyphs that use explicit 'on' points around round
155 New in Version 0.95 (2013-Mar-07)
156 ---------------------------------
158 * New option `--dehint` to strip off all hints without generating new hints.
159 This option is intended for testing purposes.
161 * Minor fixes to the created bytecode for compatibility.
163 * Minor GUI improvements.
166 New in Version 0.94 (2012-Nov-29)
167 ---------------------------------
169 * New option `--windows-compatibility` that adds two artificial blue zones
170 at vertical positions given by 'usWinAscent' and 'usWinDescent'. This
171 helps ttfautohint's hinting algorithm reduce the possibility of clipping
172 if those two values are very tight.
174 * Implement option `--x-height-snapping-exceptions`, making ttfautohint
175 avoid x-height snapping for selected PPEM values. Useful in combination
176 with `--windows-compatibility`.
178 * Minor fixes to the created bytecode for compatibility and robustness.
181 New in Version 0.93 (2012-Oct-09)
182 ---------------------------------
184 * New option `--components` to treat components of composite glyphs
185 separately. This greatly reduces the bytecode size.
187 I'm waiting for reports whether this option works for most fonts; in case
188 this is true I'm inverting the option, making it the default (and the old
191 * Full support of TTCs, this is, all subfonts get auto-hinted now.
193 * The upper limit of the `--increase-x-height` option has been removed.
195 * Drag-and-drop support in the GUI.
197 * The TTY version of ttfautohint now acts like a (Unix) filter, this is, it
198 accepts stdin and stdout as input and output, respectively.
200 * Less memory consumption.
203 New in Version 0.92 (2012-Aug-07)
204 ---------------------------------
206 * A serious bug in the created bytecode has been fixed, causing incorrect
210 New in Version 0.91 (2012-Jul-12)
211 ---------------------------------
213 * A new, 'strong' routine to handle stem widths and positions has been
214 added, to be selected with the `--strong-stem-width` command line option.
215 If it is active, stem widths and positions are snapped to the grid as much
216 as possible. This algorithm is useful for GDI ClearType support.
218 * A new command line option `--debug` (not available for ttfautohintGUI) to
219 print very detailed debugging information.
222 New in Version 0.9 (2012-Jun-06)
223 --------------------------------
225 * The created bytecode has been reduced in size, making it approx. 20%
228 * New option `--symbol` to use standard stem height and width values instead
229 of using character 'o' (which may be missing). Use this option for symbol
230 fonts or math glyphs.
232 * More documentation (in text, HTML, and PDF format). It's still
235 * Option `--ignore-permissions` has been renamed to `--ignore-restrictions`.
236 The short form is still `-i`.
238 * Defaults for various parameters have been set to more sensible values:
240 - hinting-range-max: 50 (was 1000)
241 - hinting-limit: 200 (was 1000)
243 * Option `--increase-x-height` now has a mandatory argument (in the range
244 6-20 or value\ 0 to disable it, default value is 14).
247 New in Version 0.8 (2012-Mar-21)
248 --------------------------------
250 * Implement option `-x` to increase the x height of the font for small PPEM
251 values by rounding up far more often then rounding down.
253 * Add option '`-G n`' to switch off hinting completely above value\ `n`.
255 * ttfautohint now appends version information and the used parameters to the
256 'Version' field(s) in the 'name' table. This can be suppressed with
260 New in Version 0.7 (2012-Feb-05)
261 --------------------------------
263 * A GUI has been added, using the Qt framework. The binary is called
267 New in Version 0.6.1 (2012-Jan-02)
268 ----------------------------------
270 * The improved handling of composite glyphs in 0.6 was buggy under certain
271 circumstances, making ttfautohint crash and FontValidator complain.
273 * Dropout handling has been activated.
276 New in Version 0.6 (2011-Dec-25)
277 --------------------------------
279 * Improved handling of composite glyphs.
281 * Implement option `-p` to pre-hint glyphs with original hints before
282 conversion takes place.
284 * Don't add a `DSIG` table if there is none in the input font.
286 * Human-readable error messages instead of hexadecimal error codes.
288 * Better tests (both at runtime and compile time) to reject too old FreeType
292 New in Version 0.5 (2011-Nov-06)
293 --------------------------------
295 * Rendering on iOS is now expected to give good results.
297 * No bad rendering at very large PPEM values.
300 New in Version 0.4 (2011-Oct-27)
301 --------------------------------
303 * The bytecode has been changed to 'create' twilight points. This should
304 avoid rendering artifacts on some platforms.
307 New in Version 0.3 (2011-Sep-09)
308 --------------------------------
310 * Fix font generation; sometimes the `glyf` table was one byte too short,
311 making the font invalid.
314 New in Version 0.2 (2011-Jul-19)
315 --------------------------------
317 * Fix bytecode bugs that prevented correct rendering on some platforms.
320 New in Version 0.1 (2011-Jun-30)
321 --------------------------------