1 New in Version 1.1 (2014-May-05)
2 --------------------------------
4 * Support for the Devanagari script.
6 * Bug fixes in the computation of strong stem widths. GDI hinting now gives
7 much more consistent results.
9 * Better recognition of script coverage: ttfautohint now properly scans
10 composite glyphs to cover components also.
12 * Improved glyph shape analysis: Non-flat local extrema are now recognized
13 more reliably, and stem detection works better.
16 New in Version 1.00 (2014-Mar-20)
17 ---------------------------------
19 * Much less memory consumption while handling fonts with complicated glyphs.
21 * Option `-s` was partially broken.
24 New in Version 1.00rc1 (2014-Feb-07)
25 ------------------------------------
27 * OpenType feature support. ttfautohint now uses the HarfBuzz library to
28 analyze data from the `GSUB` table. This allows the hinting of glyphs
29 that don't have an entry in a font's `cmap` table, for example
30 superscripts or small caps.
32 Related to this, the new option `--default-script` controls the default
33 (fallback) script used for OpenType features.
35 * More than a single standard character is used. For example, the 'latin'
36 script uses characters 'o', 'O', and digit '0'. This improves the hinting
37 of fonts (and features) that have only a partial coverage of a script's
40 * Much better GDI ClearType hinting in the range 30-80ppem (approx.),
41 avoiding overly flat tops and bottoms of round glyphs.
43 * Better handling of non-square pixels (this is, horizontal and vertical
44 resolutions differ) in the created TrueType bytecode.
47 New in Version 0.97 (2013-Nov-09)
48 ---------------------------------
50 * Improved script support. Besides Cyrillic and Greek, which are now
51 handled separately from Latin, ttfautohint can handle Hebrew.
53 * Option `-f` now takes a parameter to specify the fallback script. The
54 corresponding long option name has been renamed from `--latin-fallback` to
57 * Work around a bug in display environments that use FreeType 2.5.0 and
58 earlier for rendering: Sometimes, the 'strong' stem width routine was used
59 for DW ClearType (this is, subpixel hinting in FreeType is enabled) even
60 if 'smooth' was selected while generating the font with ttfautohint.
63 New in Version 0.96 (2013-Aug-06)
64 ---------------------------------
66 * Option `--components` has been replaced with `--composites`: By default,
67 the components of a composite glyph are now hinted separately, since tests
68 has shown that this gives good results in most cases. If this option is
69 set, however, the composite glyph itself gets hinted (and the hints of the
70 components are ignored).
72 An unfortunate side effect is that ttfautohint's option `-c` (which stays
73 as a shorthand for `--composites`) now does exactly the opposite as in
76 * Older versions of Monotype's 'iType' bytecode interpreter have a serious
77 bug: The DIV instruction rounds the result, while the correct operation is
78 truncation. This caused 'exploding characters' with fonts hinted by
79 ttfautohint. Since many printers contain this rasterizer without any
80 possibility to update to a non-buggy version, ttfautohint now contains
81 work-arounds to circumvent the problem.
83 * Better support for glyphs where some points have almost the same position
84 (for example glyph 'Oslash' in font 'Roboto-Thin').
86 * Better support for glyphs which use explicit 'on' points around round
90 New in Version 0.95 (2013-Mar-07)
91 ---------------------------------
93 * New option `--dehint` to strip off all hints without generating new hints.
94 This option is intended for testing purposes.
96 * Minor fixes to the created bytecode for compatibility.
98 * Minor GUI improvements.
101 New in Version 0.94 (2012-Nov-29)
102 ---------------------------------
104 * New option `--windows-compatibility` which adds two artificial blue zones
105 at vertical positions given by 'usWinAscent' and 'usWinDescent'. This
106 helps ttfautohint's hinting algorithm reduce the possibility of clipping
107 if those two values are very tight.
109 * Implement option `--x-height-snapping-exceptions`, making ttfautohint
110 avoid x-height snapping for selected PPEM values. Useful in combination
111 with `--windows-compatibility`.
113 * Minor fixes to the created bytecode for compatibility and robustness.
116 New in Version 0.93 (2012-Oct-09)
117 ---------------------------------
119 * New option `--components` to treat components of composite glyphs
120 separately. This greatly reduces the bytecode size.
122 I'm waiting for reports whether this option works for most fonts; in case
123 this is true I'm inverting the option, making it the default (and the old
126 * Full support of TTCs, this is, all subfonts get auto-hinted now.
128 * The upper limit of the `--increase-x-height` option has been removed.
130 * Drag-and-drop support in the GUI.
132 * The TTY version of ttfautohint now acts like a (Unix) filter, this is, it
133 accepts stdin and stdout as input and output, respectively.
135 * Less memory consumption.
138 New in Version 0.92 (2012-Aug-07)
139 ---------------------------------
141 * A serious bug in the created bytecode has been fixed, causing incorrect
145 New in Version 0.91 (2012-Jul-12)
146 ---------------------------------
148 * A new, 'strong' routine to handle stem widths and positions has been
149 added, to be selected with the `--strong-stem-width` command line option.
150 If it is active, stem widths and positions are snapped to the grid as much
151 as possible. This algorithm is useful for GDI ClearType support.
153 * A new command line option `--debug` (not available for ttfautohintGUI) to
154 print very detailed debugging information.
157 New in Version 0.9 (2012-Jun-06)
158 --------------------------------
160 * The created bytecode has been reduced in size, making it approx. 20%
163 * New option `--symbol` to use standard stem height and width values instead
164 of using character 'o' (which may be missing). Use this option for symbol
165 fonts or math glyphs.
167 * More documentation (in text, HTML, and PDF format). It's still
170 * Option `--ignore-permissions` has been renamed to `--ignore-restrictions`.
171 The short form is still `-i`.
173 * Defaults for various parameters have been set to more sensible values:
175 - hinting-range-max: 50 (was 1000)
176 - hinting-limit: 200 (was 1000)
178 * Option `--increase-x-height` now has a mandatory argument (in the range
179 6-20 or value\ 0 to disable it, default value is 14).
182 New in Version 0.8 (2012-Mar-21)
183 --------------------------------
185 * Implement option `-x` to increase the x height of the font for small PPEM
186 values by rounding up far more often then rounding down.
188 * Add option '`-G n`' to switch off hinting completely above value\ `n`.
190 * ttfautohint now appends version information and the used parameters to the
191 'Version' field(s) in the 'name' table. This can be suppressed with
195 New in Version 0.7 (2012-Feb-05)
196 --------------------------------
198 * A GUI has been added, using the Qt framework. The binary is called
202 New in Version 0.6.1 (2012-Jan-02)
203 ----------------------------------
205 * The improved handling of composite glyphs in 0.6 was buggy under certain
206 circumstances, making ttfautohint crash and FontValidator complain.
208 * Dropout handling has been activated.
211 New in Version 0.6 (2011-Dec-25)
212 --------------------------------
214 * Improved handling of composite glyphs.
216 * Implement option `-p` to pre-hint glyphs with original hints before
217 conversion takes place.
219 * Don't add a `DSIG` table if there is none in the input font.
221 * Human-readable error messages instead of hexadecimal error codes.
223 * Better tests (both at runtime and compile time) to reject too old FreeType
227 New in Version 0.5 (2011-Nov-06)
228 --------------------------------
230 * Rendering on iOS is now expected to give good results.
232 * No bad rendering at very large PPEM values.
235 New in Version 0.4 (2011-Oct-27)
236 --------------------------------
238 * The bytecode has been changed to 'create' twilight points. This should
239 avoid rendering artifacts on some platforms.
242 New in Version 0.3 (2011-Sep-09)
243 --------------------------------
245 * Fix font generation; sometimes the `glyf` table was one byte too short,
246 making the font invalid.
249 New in Version 0.2 (2011-Jul-19)
250 --------------------------------
252 * Fix bytecode bugs which prevented correct rendering on some platforms.
255 New in Version 0.1 (2011-Jun-30)
256 --------------------------------