4.2.1
Make sure hb_blob_create_from_file_or_fail() always returns nullptr in case of failure and not empty blob sometimes. (Khaled Hosny)
Add --passthrough-tables option to hb-subset. (Cosimo Lupo)
Reinstate a pause after basic features in Khmer shaper, fixing a regression introduced in previous release. (Behdad Esfahbod)
Better handling of Regional_Indicator when shaped with RTL-native scripts, reverting earlier fix that caused regressions in AAT shaping.
Overview of changes leading to 4.2.0
Wednesday, March 30, 2022
====================================
- Source code reorganization, splitting large hb-ot-layout files into smaller,
per-subtable ones under OT/Layout/*. Code for more tables will follow suit in
later releases. (Garret Rieger, Behdad Esfahbod)
- Revert Indic shaper change in previous release that broke some fonts and
instead make per-syllable restriction of “GSUB” application limited to
script-specific Indic features, while applying them and discretionary
features in one go. (Behdad Esfahbod)
- Fix decoding of private in gvar table. (Behdad Esfahbod)
- Fix handling of contextual lookups that delete too many glyphs. (Behdad Esfahbod)
- Make “morx” deleted glyphs don’t block “GPOS” application. (Behdad Esfahbod)
- Various build fixes. (Chun-wei Fan, Khaled Hosny)
- New API
+hb_set_next_many() (Andrew John)
Overview of changes leading to 4.1.0
Wednesday, March 23, 2022
====================================
- Various OSS-Fuzz fixes. (Behdad Esfahbod)
- Make fallback vertical-origin match FreeType’s. (Behdad Esfahbod)
- Treat visible viramas like dependent vowels in USE shaper. (David Corbett)
- Apply presentation forms features and discretionary features in one go in
Indic shaper, which seems to match Uniscribe and CoreText behaviour.
(Behdad Esfahbod, David Corbett)
- Various bug fixes.
- New API
+hb_set_add_sorted_array()
4.0.1
Update OpenType to AAT mappings for hist and vrtr features. (Florian Pircher)
Update IANA Language Subtag Registry to 2022-03-02. (David Corbett)
Update USE shaper to allow any non-numeric tail in a symbol cluster, and remove obsolete data overrides. (David Corbett)
Fix handling of baseline variations to return correctly scaled values. (Matthias Clasen)
A new experimental hb_subset_repack_or_fail() to repack an array of objects, eliminating offset overflows. The API is not available unless HarfBuzz is built with experimental APIs enabled. (Qunxin Liu)
New experimental API
+hb_link_t
+hb_object_t
+hb_subset_repack_or_fail()
Overview of changes leading to 4.0.0
Tuesday, March 1, 2022
====================================
- New public API to create subset plan and gather information on things like
glyph mappings in the final subset. The plan can then be passed on to perform
the subsetting operation. (Garret Rieger)
- Draw API for extracting glyph shapes have been extended and finalized and is
no longer an experimental API. The draw API supports glyf, CFF and CFF2
glyph outlines tables, and applies variation settings set on the font as well
as synthetic slant. The new public API is not backward compatible with the
previous, non-public, experimental API. (Behdad Esfahbod)
- The hb-view tool will use HarfBuzz draw API to render the glyphs instead of
cairo-ft when compiled with Cairo 1.17.5 or newer, setting HB_DRAW
environment variable to 1 or 0 will force using or not use the draw API,
respectively. (Behdad Esfahbod)
- The hb-shape and hb-view tools now default to using HarfBuzz’s own font
loading functions (ot) instead of FreeType ones (ft). They also have a new
option, --font-slant, to apply synthetic slant to the font. (Behdad Esfahbod)
- HarfBuzz now supports more than 65535 (the OpenType limit) glyph shapes and
metrics. See https://github.com/be-fonts/boring-expansion-spec/issues/6 and
https://github.com/be-fonts/boring-expansion-spec/issues/7 for details.
(Behdad Esfahbod)
- New API to get the dominant horizontal baseline tag for a given script.
(Behdad Esfahbod)
- New API to get the baseline positions from the font, and synthesize missing
ones. As well as new API to get font metrics and synthesize missing ones.
(Matthias Clasen)
- Improvements to finding dependencies on Windows when building with Visual
Studio. (Chun-wei Fan)
- New buffer flag, HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT, that must be set
during shaping for HB_GLYPH_FLAG_UNSAFE_TO_CONCAT flag to be reliably
produced. This is to limit the performance hit of producing this flag to when
it is actually needed. (Behdad Esfahbod)
- Documentation improvements. (Matthias Clasen)
Overview of changes leading to 3.4.0
Sunday, February 13, 2022
====================================
- Perform sanity checks on shaping results is now part of “harfbuzz” library
and can be enabled by setting the buffer flag HB_BUFFER_FLAG_VERIFY.
(Behdad Esfahbod)
- Arabic Mark Transient Reordering Algorithm have been updated to revision 6.
(Khaled Hosny)
- ISO 15924 code for mathematical notation, ‘Zmth’, now maps to the OpenType
‘math’ tag. (Alexis King)
- It is now possible to get at once all math kerning values for a given glyph
at a given corner. (Alexis King)
- Fix locale_t portability issues on systems the typdef’s it to a void pointer.
(Behdad Esfahbod)
- New API:
+HB_BUFFER_FLAG_VERIFY
+HB_OT_TAG_MATH_SCRIPT
+HB_SCRIPT_MATH
+hb_ot_math_kern_entry_t
+hb_ot_math_get_glyph_kernings
- Deprecated API
+HB_OT_MATH_SCRIPT
* Use GitHub release tarball as distfile.
Changelog:
Overview of changes leading to 3.3.1
Monday, January 31, 2022
====================================
- Fix heap-use-after-free in harfbuzz-subset introduced in previous release.
(Garret Rieger)
Overview of changes leading to 3.3.0
Monday, January 31, 2022
====================================
- Improved documentation. (Matthias Clasen)
- Internal code cleanup, using C++ standard library more. (Behdad Esfahbod)
- The low 16-bits of face index will be used by hb_face_create() to select a
face inside a font collection file format, while the high 16-bits will be
used by hb_font_create() to load the named instance. (Behdad Esfahbod)
- Glyph positions and other font metrics now apply synthetic slant set by
hb_font_set_synthetic_slant(), for improved positioning for synthetically
slanted fonts. (Behdad Esfahbod)
- Fixed unintentional locale dependency in hb_variation_to_string() for decimal
point representation. (Matthias Clasen)
- When applying pair positioning (kerning) the positioning value is split
between the two sides of the pair for improved cursor positioning between
such pairs. (Behdad Esfahbod)
- Introduced new HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, to be used in conjunction
with HB_GLYPH_FLAG_UNSAFE_TO_BREAK for optimizing re-shaping during line
breaking. Check the documentation for further details. (Behdad Esfahbod)
- Improved handling of macrolanguages when mapping BCP 47 codes to OpenType
tags. (David Corbett)
- New API:
+HB_GLYPH_FLAG_UNSAFE_TO_CONCAT
+hb_segment_properties_overlay()
+hb_buffer_create_similar()
+hb_font_set_synthetic_slant()
+hb_font_get_synthetic_slant()
+hb_font_get_var_coords_design()
Overview of changes leading to 3.2.0
Friday, November 26, 2021
====================================
"harfbuzz" library improvements:
- Fixed shaping of Apple Color Emoji flags in right-to-left context. (Behdad Esfahbod)
- Fixed positioning of CFF fonts in HB_TINY profile. (Behdad Esfahbod)
- OpenType 1.9 language tags update. (David Corbett)
- Add HB_NO_VERTICAL config option.
- Add HB_CONFIG_OVERRIDE_H for easier configuration. (Behdad Esfahbod)
"harfbuzz-subset" library improvements:
- Improved packing of cmap, loca, and Ligature tables. (Garret Rieger)
- Significantly improved overflow-resolution strategy in the repacker. (Garret Rieger)
3.1.2
hb-shape / hb-view: revert treating text on the commandline as single paragraph (was introduced in 3.0.0); add new --single-par to do that.
Subsetter bug fixes.
3.1.0
Better offset-overflow handling in the subsetter library. (Garret Rieger)
Improved Unicode 14 properties in the USE shaper, and various other USE shaper fixes. (David Corbett)
MATH and COLR v1 tables subsetting support, and various other subsetter fixes. (Qunxin Liu)
Support for Pwo Karen / Ason Chin medial la. (Simon Cozens)
Apply GPOS positioning when substituting with morx table, if kerx is missing. (Behdad Esfahbod)
Apply calt and clig features across syllable boundaries in Indic shaper. (Behdad Esfahbod)
Meson option for enabling Graphite 2 has been renamed to graphite2.
Build and documentation fixes.
New API:
+hb_buffer_set_not_found_glyph()
+hb_buffer_get_not_found_glyph()
Overview of changes leading to 3.0.0
Friday, September 17, 2021
====================================
- Unicode 14.0 support (David Corbett).
- The hb-subset API and the harfbuzz-subset library's ABI are now declared
stable. The harfbuzz-subset library would not have been possible without the
work of Garret Rieger and Qunxin Liu from Google Fonts, and the earlier work
of Michiharu Ariza from Adobe.
- The hb-style API is now stable and no longer experimental.
- New API:
+hb_style_tag_t
+hb_style_get_value()
+hb_subset_input_t
+hb_subset_flags_t
+hb_subset_sets_t
+hb_subset_input_create_or_fail()
+hb_subset_input_reference()
+hb_subset_input_destroy()
+hb_subset_input_set_user_data()
+hb_subset_input_get_user_data()
+hb_subset_input_unicode_set()
+hb_subset_input_glyph_set()
+hb_subset_input_set()
+hb_subset_input_get_flags()
+hb_subset_input_set_flags()
+hb_subset_or_fail()
- Removed old unstable harfbuzz-subset API:
-hb_subset_input_nameid_set()
-hb_subset_input_namelangid_set()
-hb_subset_input_layout_features_set()
-hb_subset_input_no_subset_tables_set()
-hb_subset_input_drop_tables_set()
-hb_subset_input_set_drop_hints()
-hb_subset_input_get_drop_hints()
-hb_subset_input_set_desubroutinize()
-hb_subset_input_get_desubroutinize()
-hb_subset_input_set_retain_gids()
-hb_subset_input_get_retain_gids()
-hb_subset_input_set_name_legacy()
-hb_subset_input_get_name_legacy()
-hb_subset_input_set_overlaps_flag()
-hb_subset_input_get_overlaps_flag()
-hb_subset_input_set_notdef_outline()
-hb_subset_input_get_notdef_outline()
-hb_subset_input_set_no_prune_unicode_ranges()
-hb_subset_input_get_no_prune_unicode_ranges()
-hb_subset()
Overview of changes leading to 2.9.1
Tuesday, September 7, 2021
====================================
- Final subset API is in place and if no issues are discovered, it will be the
stable subset API of HarfBuzz 3.0.0. Old API is kept to ease transition, but
will be removed in 3.0.0.
- Various fuzzer-found bug fixes.
- hb_buffer_append() now handles the pre- and post-context which previously
were left unchanged in the destination buffer.
- hb-view / hb-shape now accept following new arguments:
o --unicodes-before/after: takes a list of hex numbers that represent Unicode
codepoints.
- Undeprecated API:
hb_set_invert()
Overview of changes leading to 2.9.0
Wednesday, August 18, 2021
History Repeats Itself (Afghanistan)
====================================
- Subsetter API is being stabilized, with the first stable API to happen in
3.0.0 release (https://github.com/harfbuzz/harfbuzz/issues/3078).
- Support multiple variation axes with same tag, aka HOI.
- The “coretext” testing shaper now passes font variations to CoreText.
- hb-shape/hb-view does not break line at new lines unless text is read from
file.
- hb-view and hb-subset has a --batch now, similar to hb-shape.
- The --batch mode now uses ; as argument separator instead of : used previously.
- The --batch in hb-shape does not expect 0th argument anymore. That is, the
lines read are interpreted as argv[1:], instead of argv[0:].
- The --batch option has been undocumented. We are ready to document it; send
feedback if you find it useful.
- hb-subset got arguments revamps. Added much-requested --gids-file, --glyphs,
--glyphs-file, --unicodes-file, supporting ranges in --unicodes.
- Various bug fixes.
Overview of changes leading to 2.8.1
Tuesday, May 4, 2021
====================================
- Subsetter now fully supports GSUB/GPOS/GDEF tables (including variations); as
such, layout tables are retained by subsetter by default. (Garret Rieger, Qunxin Liu)
- Build scripts no longer check for FontConfig as HarfBuzz does not use it.
- hb-view supports iTerm2 and kitty inline image protocols (Khaled Hosny),
it can also use Chafa for terminal graphics if available (Hans Petter Jansson).
Overview of changes leading to 2.8.0
Tuesday, March 16, 2021
====================================
- Shape joining scripts other than Arabic/Syriac using the Universal Shaping Engine.
Previously these were shaped using the generalized Arabic shaper. (David Corbett)
- Fix regression in shaping of U+0B55 ORIYA SIGN OVERLINE. (David Corbett)
- Update language tags. (David Corbett)
- Variations: reduce error: do not round each interpolated delta. (Just van Rossum)
- Documentation improvements. (Khaled Hosny, Nathan Willis)
- Subsetter improvements: subsets most, if not all, lookup types now. (Garret Rieger,
Qunxin Liu)
- Fuzzer-found fixes and other improvements when memory failures happen. (Behdad)
- Removed most atomic implementations now that we have C++11 atomic impl. (Behdad)
- General codebase upkeep; using more C++11 features: constexpr constructors, etc.
(Behdad)
Changelog:
2.7.4
Fix missing --enable-introspection configure option from previous release tarball.
Documentation updates.
2.7.3
Update USE shaper to 2020-08-13 specification, and other improvements.
Don't disable liga feature in myanmar shaper, to match Uniscribe.
Improvements to language and script tags handling.
Update language system tag registry to OpenType 1.8.4
Support for serializing and deserializing Unicode buffers. Serialized buffers
are now delimited with <> or [] based on whether it is a Unicode or
glyphs buffer.
Increase buffer work limits to handle fonts with many complex lookups.
Handle more shaping operations in trace output.
Memory access fixes.
More OOM fixes.
Improved documentation.
Build system improvements.
New API:
+hb_buffer_has_positions()
+hb_buffer_serialize()
+hb_buffer_serialize_unicode()
+hb_buffer_deserialize_unicode()
> In file included from ../test/api/test-aat-layout.c:25:0:
> ../test/api/hb-test.h: In function 'hb_test_assert_blobs_equal':
> ../test/api/hb-test.h:178:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
> for (unsigned int i = 0; i < expected_length; i++)
> ^
> ../test/api/hb-test.h:178:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
Only a few pieces of software are using the ICU integration library,
these aren't the big harfbuzz users (i.e. gtk). this is intended to lessen
the impact of icu's frequent ABI breaks.
