X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=NEWS;h=dbe17554f82a49fabc809c8b16028ebf3cff513a;hb=refs%2Fheads%2Ftizen_7.0;hp=adc8f694ed49c85b04de5858ba67e6b3305dfefd;hpb=4a63fee1394ef6d952890db5d6cf4b664f19da2e;p=platform%2Fupstream%2Fharfbuzz.git diff --git a/NEWS b/NEWS index adc8f69..dbe1755 100644 --- a/NEWS +++ b/NEWS @@ -1,3 +1,1635 @@ +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 + + +Overview of changes leading to 3.3.2 +Sunday, February 6, 2022 +==================================== +- Revert splitting of pair positioning values introduced in 3.3.0 as it proved + problematic. (Behdad Esfahbod) + + +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) + + +Overview of changes leading to 3.1.2 +Friday, November 26, 2021 +==================================== +- 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. + (Behdad Esfahbod) +- Subsetter bug fixes. (Garret Rieger, Qunxin Liu, Behdad Esfahbod) + + +Overview of changes leading to 3.1.1 +Wednesday, November 8, 2021 +==================================== +- Work around GCC cast-align error/warning on some platforms. (Behdad Esfahbod) +- Documentation improvements. (Matthias Clasen) + + +Overview of changes leading to 3.1.0 +Wednesday, November 3, 2021 +==================================== +- 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 2.8.2 +Tuesday, July 8, 2021 +==================================== +- Shaping LTR digits for RTL scripts now makes the native direction of the + digits LTR, applying shaping and positioning rules on the same glyph order as + Uniscribe. (Jonathan Kew, Khaled Hosny). +- Subsetting COLR v1 and CPAL tables is now supported. (Garret Rieger, Qunxin Liu) +- Various fixes and improvements to the subsetter. (Garret Rieger, Qunxin Liu, Behdad) +- When applying morx table, mark glyph widths should not be zeroed. (Jonathan Kew) +- GPOS is preferred over kerx, if GSUB was applied. (Behdad) +- Regional_Indicator pairs are grouped together when clustering. (Behdad) +- New API: ++hb_blob_create_or_fail() ++hb_blob_create_from_file_or_fail() ++hb_set_copy() + + +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) + + +Overview of changes leading to 2.7.4 +Sunday, December 27, 2020 +==================================== +- Fix missing --enable-introspection configure option from previous release + tarball. +- Documentation updates. + + +Overview of changes leading to 2.7.3 +Wednesday, December 23, 2020 +==================================== +- 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() + + +Overview of changes leading to 2.7.2 +Saturday, August 29, 2020 +==================================== +- Fix a regression in the previous release that caused a crash with Kaithi. +- More OOM fixes. + + +Overview of changes leading to 2.7.1 +Thursday, August 13, 2020 +==================================== +- ot-funcs now handles variable empty glyphs better when hvar/vvar isn't present. +- Reverted a GDEF processing regression. +- A couple of fixes to handle OOM better. + + +Overview of changes leading to 2.7.0 +Saturday, July 25, 2020 +==================================== +- Use an implementation for round that always rounds up, some minor fluctuations + are expected on var font specially when hb-ot callback is used. +- Fix an AAT's `kerx` issue on broken rendering of Devanagari Sangam MN. +- Remove AAT's `lcar` table support from _get_ligature_carets API, not even much + use on macOS installed fonts (only two files). GDEF support is the recommended + one and expected to work properly after issues fixed two releases ago. +- Minor memory fixes to handle OOM better specially in hb-ft. +- Minor .so files versioning scheme change and remove stable/unstable scheme + differences, was never used in practice (always default to stable scheme). +- We are now suggesting careful packaging of the library using meson, + https://github.com/harfbuzz/harfbuzz/wiki/Notes-on-migration-to-meson + for more information. +- Distribution package URL is changed, either use GitHub generated tarballs, + `https://github.com/harfbuzz/harfbuzz/archive/$pkgver.tar.gz` + or, even more preferably use commit hash of the release and git checkouts like, + `git+https://github.com/harfbuzz/harfbuzz#commit=$commit` + + +Overview of changes leading to 2.6.8 +Monday, June 22, 2020 +==================================== +- New API to fetch glyph alternates from GSUB table. +- hb-coretext build fix for macOS < 10.10. +- Meson build fixes, cmake port removal is postponed but please prepare for + it and give us feedback. + Autotools is still our main build system however please consider + experimenting with meson also for packaging the library. +- New API: ++hb_ot_layout_lookup_get_glyph_alternates() + + +Overview of changes leading to 2.6.7 +Wednesday, June 3, 2020 +==================================== +- Update to Unicode 13.0.0. +- Fix hb_ot_layout_get_ligature_carets for fonts without lcar table, it was + completely broken for all the other fonts since 2.1.2. +- As a part of our migration to meson, this release will be the last one + to provide cmake port files but autotools still is our main build system. + There is a possibility that the next version or the after be released + using meson. + + +Overview of changes leading to 2.6.6 +Tuesday, May 12, 2020 +==================================== +- A fix in AAT kerning for Geeza Pro. +- Better support for resource fork fonts on macOS. + + +Overview of changes leading to 2.6.5 +Friday, April 17, 2020 +==================================== +- Add experimental meson build system. Autotools is still the primary + and supported build system. +- AAT is now always preferred for horizontal scripts when both AAT and OT + layout tables exist at the same time. +- Subsetter improvements. +- New API: ++hb_ft_font_lock_face() ++hb_ft_font_unlock_face() + + +Overview of changes leading to 2.6.4 +Monday, October 29, 2019 +==================================== +- Small bug fix. +- Build fixes. + + +Overview of changes leading to 2.6.3 +Monday, October 28, 2019 +==================================== +- Misc small fixes, mostly to build-related issues. +- New API: ++hb_font_get_nominal_glyphs() + + +Overview of changes leading to 2.6.2 +Monday, September 30, 2019 +==================================== +- Misc small fixes, mostly to build-related issues. + + +Overview of changes leading to 2.6.1 +Thursday, August 22, 2019 +==================================== +- Fix regression with hb_font_create_sub_font scaling introduced in 2.6.0. +- Change interpretation of font PTEM size / CoreText font size handling. + See https://github.com/harfbuzz/harfbuzz/pull/1484 +- hb-ot-font: Prefer symbol cmap subtable if present. +- Apply 'dist'/'abvm'/'blwm' features to all scripts. +- Drop experimental DirectWrite API. + + +Overview of changes leading to 2.6.0 +Tuesday, August 13, 2019 +==================================== +- New OpenType metrics, baseline, and metadata table access APIs. +- New API to set font variations to a named-instance. +- New hb-gdi.h header and API for creating hb_face_t from HFONT. +- Amalgam: Provide a single-file harfbuzz.cc file for easier alternate building. +- More size-reduction configurable options, enabled by HB_TINY. +- New API: ++hb_font_set_var_named_instance() ++hb_gdi_face_create() ++hb_ot_layout_baseline_tag_t ++hb_ot_layout_get_baseline() ++hb_ot_meta_tag_t ++hb_ot_meta_get_entry_tags() ++hb_ot_meta_reference_entry() ++hb_ot_metrics_tag_t ++hb_ot_metrics_get_position() ++hb_ot_metrics_get_variation() ++hb_ot_metrics_get_x_variation() ++hb_ot_metrics_get_y_variation() + + +Overview of changes leading to 2.5.3 +Wednesday, June 26, 2019 +==================================== +- Fix UCD script data for Unicode 10+ scripts. This was broken since 2.5.0. +- More optimizations for HB_TINY. + + +Overview of changes leading to 2.5.2 +Thursday, June 20, 2019 +==================================== +- More hb-config.hh facilities to shrink library size, namely when built as + HB_TINY. +- New documentation of custom configurations in CONFIG.md. +- Fix build on gcc 4.8. That's supported again. +- Universal Shaping Engine improvements thanks to David Corbett. +- API Changes: Undeprecate some horizontal-kerning API and re-enable in hb-ft, + such that Type1 fonts will continue kerning. + + +Overview of changes leading to 2.5.1 +Friday, May 31, 2019 +==================================== +- Fix build with various versions of Visual Studio. +- Improved documentation, thanks to Nathan Willis. +- Bugfix in subsetting glyf table. +- Improved scripts for cross-compiling for Windows using mingw. +- Rename HB_MATH_GLYPH_PART_FLAG_EXTENDER to HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER. + A deprecated macro is added for backwards-compatibility. + + +Overview of changes leading to 2.5.0 +Friday, May 24, 2019 +==================================== +- This release does not include much functional changes, but includes major internal + code-base changes. We now require C++11. Support for gcc 4.8 and earlier has been + dropped. +- New hb-config.hh facility for compiling smaller library for embedded and web usecases. +- New Unicode Character Database implementation that is half the size of previously-used + UCDN. +- Subsetter improvements. +- Improved documentation, thanks to Nathan Willis. +- Misc shaping fixes. + + +Overview of changes leading to 2.4.0 +Monday, March 25, 2019 +==================================== +- Unicode 12. +- Misc fixes. +- Subsetter improvements. +- New API: +HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE +hb_directwrite_face_create() + + +Overview of changes leading to 2.3.1 +Wednesday, January 30, 2019 +==================================== +- AAT bug fixes. +- Misc internal housekeeping cleanup. + + +Overview of changes leading to 2.3.0 +Thursday, December 20, 2018 +==================================== +- Fix regression on big-endian architectures. Ouch! +- Misc bug and build fixes. +- Fix subsetting of simple GSUB/GDEF. +- Merge CFF / CFF2 support contributed by Adobe. This mostly involves + the subsetter, but also get_glyph_extents on CFF fonts. + +New API in hb-aat.h: ++hb_aat_layout_has_substitution() ++hb_aat_layout_has_positioning() ++hb_aat_layout_has_tracking() + + +Overview of changes leading to 2.2.0 +Thursday, November 29, 2018 +==================================== +- Misc shaping bug fixes. +- Add font variations named-instance API. +- Deprecate font variations axis enumeration API and add replacement. +- AAT shaping improvements: + o Fixed 'kern' table Format 2 implementation. + o Implement 'feat' table API for feature detection. + o Blacklist 'GSUB' table of fonts from 'MUTF' foundry that also have 'morx'. + +New API: ++hb_aat_layout_feature_type_t ++hb_aat_layout_feature_selector_t ++hb_aat_layout_get_feature_types() ++hb_aat_layout_feature_type_get_name_id ++hb_aat_layout_feature_selector_info_t ++HB_AAT_LAYOUT_NO_SELECTOR_INDEX ++hb_aat_layout_feature_type_get_selector_infos() ++hb_ot_var_axis_flags_t ++hb_ot_var_axis_info_t ++hb_ot_var_get_axis_infos() ++hb_ot_var_find_axis_info() ++hb_ot_var_get_named_instance_count() ++hb_ot_var_named_instance_get_subfamily_name_id() ++hb_ot_var_named_instance_get_postscript_name_id() ++hb_ot_var_named_instance_get_design_coords() + +Deprecated API: ++HB_OT_VAR_NO_AXIS_INDEX ++hb_ot_var_axis_t ++hb_ot_var_get_axes() ++hb_ot_var_find_axis() + + +Overview of changes leading to 2.1.3 +Friday, November 16, 2018 +==================================== +- Fix AAT 'mort' shaping, which was broken in 2.1.2 + + +Overview of changes leading to 2.1.2 +Friday, November 16, 2018 +==================================== +- Various internal changes. +- AAT shaping improvements: + o Implement kern table Format 1 state-machine-based kerning. + o Implement cross-stream kerning (cursive positioning, etc). + o Ignore emptyish GSUB tables (zero scripts) if morx present. + o Don't apply GPOS if morx is being applied. Matches Apple. + + +-Overview of changes leading to 2.1.1 +Monday, November 5, 2018 +==================================== +- AAT improvements: + o Implement 'mort' table. + o Implement 'kern' subtables Format 1 and Format 3. + + +Overview of changes leading to 2.1.0 +Tuesday, October 30, 2018 +==================================== +- AAT shaping improvements: + o Allow user controlling AAT features, for whole buffer only currently. + o Several 'morx' fixes. + o Implement tuple-kerns in 'kerx'; Fixes kerning with Apple default + San Francisco fonts. +- Support for color fonts: + o COLR/CPAL API to fetch color layers. + o SVG table to fetch SVG documents. + o CBDT/sbix API to fetch PNG images. +- New 'name' table API. +- hb-ot-font now uses 'VORG' table to correctly position CFF glyphs + in vertical layout. +- Various fuzzer-found bug fixes. + +Changed API: + +A type and a macro added in 2.0.0 were renamed: + +hb_name_id_t -> hb_ot_name_id_t +HB_NAME_ID_INVALID -> HB_OT_NAME_ID_INVALID + +New API: + ++hb_color_t ++HB_COLOR ++hb_color_get_alpha() ++hb_color_get_red() ++hb_color_get_green() ++hb_color_get_blue() ++hb_ot_color_has_palettes() ++hb_ot_color_palette_get_count() ++hb_ot_color_palette_get_name_id() ++hb_ot_color_palette_color_get_name_id() ++hb_ot_color_palette_flags_t ++hb_ot_color_palette_get_flags() ++hb_ot_color_palette_get_colors() ++hb_ot_color_has_layers() ++hb_ot_color_layer_t ++hb_ot_color_glyph_get_layers() ++hb_ot_color_has_svg() ++hb_ot_color_glyph_reference_svg() ++hb_ot_color_has_png() ++hb_ot_color_glyph_reference_png() + ++hb_ot_name_id_t ++HB_OT_NAME_ID_INVALID ++HB_OT_NAME_ID_COPYRIGHT ++HB_OT_NAME_ID_FONT_FAMILY ++HB_OT_NAME_ID_FONT_SUBFAMILY ++HB_OT_NAME_ID_UNIQUE_ID ++HB_OT_NAME_ID_FULL_NAME ++HB_OT_NAME_ID_VERSION_STRING ++HB_OT_NAME_ID_POSTSCRIPT_NAME ++HB_OT_NAME_ID_TRADEMARK ++HB_OT_NAME_ID_MANUFACTURER ++HB_OT_NAME_ID_DESIGNER ++HB_OT_NAME_ID_DESCRIPTION ++HB_OT_NAME_ID_VENDOR_URL ++HB_OT_NAME_ID_DESIGNER_URL ++HB_OT_NAME_ID_LICENSE ++HB_OT_NAME_ID_LICENSE_URL ++HB_OT_NAME_ID_TYPOGRAPHIC_FAMILY ++HB_OT_NAME_ID_TYPOGRAPHIC_SUBFAMILY ++HB_OT_NAME_ID_MAC_FULL_NAME ++HB_OT_NAME_ID_SAMPLE_TEXT ++HB_OT_NAME_ID_CID_FINDFONT_NAME ++HB_OT_NAME_ID_WWS_FAMILY ++HB_OT_NAME_ID_WWS_SUBFAMILY ++HB_OT_NAME_ID_LIGHT_BACKGROUND ++HB_OT_NAME_ID_DARK_BACKGROUND ++HB_OT_NAME_ID_VARIATIONS_PS_PREFIX ++hb_ot_name_entry_t ++hb_ot_name_list_names() ++hb_ot_name_get_utf8() ++hb_ot_name_get_utf16() ++hb_ot_name_get_utf32() + + +Overview of changes leading to 2.0.2 +Saturday, October 20, 2018 +==================================== +- Fix two minor memory access issues in AAT tables. + + +Overview of changes leading to 2.0.1 +Friday, October 19, 2018 +==================================== +- Fix hb-version.h reported release version that went wrong (1.8.0) + with previous release. +- Fix extrapolation in 'trak' table. +- Fix hb-font infinite-recursion issue with some font funcs and + subclassed fonts. +- Implement variation-kerning format in kerx table, although without + variation. +- Fix return value of hb_map_is_empty(). + + +Overview of changes leading to 2.0.0 +Thursday, October 18, 2018 +==================================== +- Added AAT shaping support (morx/kerx/trak). + Automatically used if GSUB/GPOS are not available respectively. + Set HB_OPTIONS=aat env var to have morx/kerx preferred over + GSUB/GPOS. +- Apply TrueType kern table internally, instead of relying on + hb_font_t callbacks. +- Khmer shaper significantly rewritten to better match Uniscribe. +- Indic3 tags ('dev3', etc) are passed to USE shaper. +- .dfont Mac font containers implemented. +- Script- and language-mapping revamped to better use BCP 47. +- Misc USE and Indic fixes. +- Misc everything fixes. +- Too many things to list. Biggest release since 0.9.1, with + over 500 commits in just over 5 weeks! Didn't intend it to + be a big release. Just happened to become. +- hb-ft now locks underlying FT_Face during use. + +API changes: + +- Newly-created hb_font_t's now have our internal "hb-ot-font" + callbacks set on them, so they should work out of the box + without any callbacks set. If callbacks are set, everything + is back to what it was before, the fallback callbacks are + null. If you to get the internal implementation modified, + sub_font it. + +- New hb_font_funcs_set_nominal_glyphs_func() allows speeding + up character to glyph mapping. + +New API: ++HB_FEATURE_GLOBAL_START ++HB_FEATURE_GLOBAL_END ++hb_buffer_set_invisible_glyph() ++hb_buffer_get_invisible_glyph() ++hb_font_funcs_set_nominal_glyphs_func() ++hb_ot_layout_table_select_script() ++hb_ot_layout_script_select_language() ++hb_ot_layout_feature_get_name_ids() ++hb_ot_layout_feature_get_characters() ++hb_name_id_t ++HB_NAME_ID_INVALID ++HB_OT_MAX_TAGS_PER_SCRIPT ++hb_ot_tags_from_script_and_language() ++hb_ot_tags_to_script_and_language() + +Deprecated API: +-hb_font_funcs_set_glyph_func() +-hb_unicode_eastasian_width_func_t +-hb_unicode_funcs_set_eastasian_width_func() +-hb_unicode_eastasian_width() +-hb_unicode_decompose_compatibility_func_t +-HB_UNICODE_MAX_DECOMPOSITION_LEN +-hb_unicode_funcs_set_decompose_compatibility_func() +-hb_unicode_decompose_compatibility() +-hb_font_funcs_set_glyph_h_kerning_func() +-hb_font_funcs_set_glyph_v_kerning_func() +-hb_font_get_glyph_h_kerning() +-hb_font_get_glyph_v_kerning() +-hb_font_get_glyph_kerning_for_direction() +-hb_ot_layout_table_choose_script() +-hb_ot_layout_script_find_language() +-hb_ot_tags_from_script() +-hb_ot_tag_from_language() + + +Overview of changes leading to 1.9.0 +Monday, September 10, 2018 +==================================== +- Added 'cmap' API to hb_face_t. +- Face-builder API. +- hb-ot-font re-creation should be much leaner now, as the + font tables it uses are cached on hb_face_t now. +- Internal source header file name changes: + hb-*-private.hh is renamed to hb-*.hh. + +New API: ++HB_UNICODE_MAX ++hb_face_collect_unicodes() ++hb_face_collect_variation_selectors() ++hb_face_collect_variation_unicodes() ++hb_face_builder_create() ++hb_face_builder_add_table() + + +Overview of changes leading to 1.8.8 +Tuesday, August 14, 2018 +==================================== +- Fix hb-icu crash on architectures where compare_exchange_weak() can + fail falsely. This bug was introduced in 1.8.4. + https://bugs.chromium.org/p/chromium/issues/detail?id=873568 +- More internal refactoring of atomic operations and singletons. +- API changes: + The following functions do NOT reference their return value before + returning: + * hb_unicode_funcs_get_default() + * hb_glib_get_unicode_funcs() + * hb_icu_get_unicode_funcs() + This is consistent with their naming ("get", instead of "reference") + as well as how they are used in the wild (ie. no one calls destroy() + on their return value.) + + +Overview of changes leading to 1.8.7 +Wednesday, August 8, 2018 +==================================== +- Fix assertion failure with GDEF-blacklisted fonts. + + +Overview of changes leading to 1.8.6 +Tuesday, August 7, 2018 +==================================== +- Internal code shuffling. +- New API to speed up getting advance widths for implementations + that have heavy overhead in get_h_advance callback: ++hb_font_funcs_set_glyph_h_advances_func ++hb_font_funcs_set_glyph_v_advances_func ++hb_font_get_glyph_advances_for_direction ++hb_font_get_glyph_h_advances ++hb_font_get_glyph_h_advances_func_t ++hb_font_get_glyph_v_advances ++hb_font_get_glyph_v_advances_func_t + + +Overview of changes leading to 1.8.5 +Wednesday, August 1, 2018 +==================================== +- Major Khmer shaper improvements to better match Microsoft. +- Indic bug fixes. +- Internal improvements to atomic operations. + + +Overview of changes leading to 1.8.4 +Tuesday, July 17, 2018 +==================================== +- Fix build on non-C++11. +- Use C++-style GCC atomics and C++11 atomics. + + +Overview of changes leading to 1.8.3 +Wednesday, July 11, 2018 +==================================== +- A couple of Indic / USE bug fixes. +- Disable vectorization, as it was causing unaligned access bus error on + certain 32bit architectures. + + +Overview of changes leading to 1.8.2 +Tuesday, July 3, 2018 +==================================== +- Fix infinite loop in Khmer shaper. +- Improve hb_blob_create_from_file() for streams. + + +Overview of changes leading to 1.8.1 +Tuesday, June 12, 2018 +==================================== +- Fix hb-version.h file generation; last two releases went out with wrong ones. +- Add correctness bug in hb_set_t operations, introduced in 1.7.7. +- Remove HB_SUBSET_BUILTIN build option. Not necessary. + + +Overview of changes leading to 1.8.0 +Tuesday, June 5, 2018 +==================================== +- Update to Unicode 11.0.0. + + +Overview of changes leading to 1.7.7 +Tuesday, June 5, 2018 +==================================== +- Lots of internal changes, but not yet exposed externally. +- All HarfBuzz objects are significantly smaller in size now. +- Sinhala: Position repha on top of post-consonant, not base. + This better matches Windows 10 behavior, which was changed + from previous Windows versions. +- New build options: + o New cpp macro HB_NO_ATEXIT + o New cpp macro HB_SUBSET_BUILTIN +- Significant libharfbuzz-subset changes. API subject to change. +- New API in libharfbuzz: + ++hb_blob_create_from_file() ++hb_face_count() + +A hashmap implementation: ++hb-map.h ++HB_MAP_VALUE_INVALID ++hb_map_t ++hb_map_create() ++hb_map_get_empty() ++hb_map_reference() ++hb_map_destroy() ++hb_map_set_user_data() ++hb_map_get_user_data() ++hb_map_allocation_successful() ++hb_map_clear() ++hb_map_is_empty() ++hb_map_get_population() ++hb_map_set() ++hb_map_get() ++hb_map_del() ++hb_map_has() + + +Overview of changes leading to 1.7.6 +Wednesday, March 7, 2018 +==================================== + +- Fix to hb_set_t binary operations. Ouch. +- New experimental harfbuzz-subset library. All of hb-subset.h + is experimental right now and API WILL change. + +- New API: +hb_blob_copy_writable_or_fail() +HB_OT_TAG_BASE +hb_set_previous() +hb_set_previous_range() + + +Overview of changes leading to 1.7.5 +Tuesday, January 30, 2018 +==================================== + +- Separate Khmer shaper from Indic. +- First stab at AAT morx. Not hooked up. +- Misc bug fixes. + + +Overview of changes leading to 1.7.4 +Wednesday, December 20, 2017 +==================================== + +- Fix collect_glyphs() regression caused by hb_set_t changes. + + +Overview of changes leading to 1.7.3 +Monday, December 18, 2017 +==================================== + +- hb_set_t performance tuning and optimizations. +- Speed up collect_glyphs() and reject garbage data. +- In hb_coretext_font_create() set font point-size (ptem). +- Misc fixes. + + +Overview of changes leading to 1.7.2 +Monday, December 4, 2017 +==================================== + +- Optimize hb_set_add_range(). +- Misc fixes. +- New API: +hb_coretext_font_create() + + +Overview of changes leading to 1.7.1 +Tuesday, November 14, 2017 +==================================== + +- Fix atexit object destruction regression. +- Fix minor integer-overflow. + + +Overview of changes leading to 1.7.0 +Monday, November 13, 2017 +==================================== + +- Minor Indic fixes. +- Implement kerning and glyph names in hb-ot-font. +- Various DSO optimization re .data and .bss sizes. +- Make C++11 optional; build fixes. +- Mark all other backends "unsafe-to-break". +- Graphite fix. + + +Overview of changes leading to 1.6.3 +Thursday, October 26th, 2017 +==================================== + +- Fix hb_set_t some more. Should be solid now. +- Implement get_glyph_name() for hb-ot-font. +- Misc fixes. + + +Overview of changes leading to 1.6.2 +Monday, October 23nd, 2017 +==================================== + +- Yesterday's release had a bad crasher; don't use it. That's what + happens when one works on Sunday... + https://github.com/harfbuzz/harfbuzz/issues/578 +- Build fixes for FreeBSD and Chrome Android. + + +Overview of changes leading to 1.6.1 +Sunday, October 22nd, 2017 +==================================== + +- Don't skip over COMBINING GRAPHEME JOINER when ligating, etc. + To be refined: https://github.com/harfbuzz/harfbuzz/issues/554 +- Faster hb_set_t implementation. +- Don't use deprecated ICU API. +- Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0 +- Deprecated API: + hb_set_invert() + + +Overview of changes leading to 1.6.0 +Friday, October the 13th, 2017 +==================================== + +- Update to Unicode 10. + +- Various Indic and Universal Shaping Engine fixes as a result of + HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at + the Igalia offices in A Coruña, Spain. Thanks Igalia for having + us! + +- Implement Unicode Arabic Mark Ordering Algorithm UTR#53. + +- Implement optical sizing / tracking in CoreText backend, using + new API hb_font_set_ptem(). + +- Allow notifying hb_font_t that underlying FT_Face changed sizing, + using new API hb_ft_font_changed(). + +- More Graphite backend RTL fixes. + +- Fix caching of variable font shaping plans. + +- hb-view / hb-shape now accept following new arguments: + + o --unicodes: takes a list of hex numbers that represent Unicode + codepoints. + +New API: ++hb_face_get_table_tags() ++hb_font_set_ptem() ++hb_font_get_ptem() ++hb_ft_font_changed() + + +Overview of changes leading to 1.5.1 +Tuesday, September 5, 2017 +==================================== + +- Fix "unsafe-to-break" in fallback shaping and other corner cases. + All our tests pass with --verify now, meaning unsafe-to-break API + works as expected. +- Add --unicodes to hb-view / hb-shape. +- [indic] Treat Consonant_With_Stacker as consonant. This will need + further tweaking. +- hb_buffer_diff() tweaks. + + +Overview of changes leading to 1.5.0 +Wednesday, August 23, 2017 +==================================== + +- Misc new API, for appending a buffer to another, and for comparing + contents of two buffers for types of differences. + +- New "unsafe-to-break" API. Can be used to speed up reshaping + in line-breaking situations. Essentially, after shaping, it returns + positions in the input string (some of the cluster boundaries) that + are "safe to break" in that if the text is segmented at that position + and two sides reshaped and concatenated, the shaping result is + exactly the same as shaping the text in one piece. + + hb-view and hb-shape and hb-shape now take --verify, which verifies + the above property. + + Some corner cases of the implementation are still not quite working. + Those will be fixed in subsequent releases. + +- New API: + +hb_buffer_append() + +hb_glyph_flags_t +HB_GLYPH_FLAG_UNSAFE_TO_BREAK +HB_GLYPH_FLAG_DEFINED +hb_glyph_info_get_glyph_flags() + +HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS + +hb_buffer_diff_flags_t +HB_BUFFER_DIFF_FLAG_EQUAL +HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH +HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH +HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT +HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT +HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH +HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH +HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH +HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH +hb_buffer_diff + + +Overview of changes leading to 1.4.8 +Tuesday, August 8, 2017 +==================================== + +- Major fix to avar table handling. +- Rename hb-shape --show-message to --trace. +- Build fixes. + + +Overview of changes leading to 1.4.7 +Tuesday, July 18, 2017 +==================================== + +- Multiple Indic, Tibetan, and Cham fixes. +- CoreText: Allow disabling kerning. +- Adjust Arabic feature order again. +- Misc build fixes. + + +Overview of changes leading to 1.4.6 +Sunday, April 23, 2017 +==================================== + +- Graphite2: Fix RTL positioning issue. +- Backlist GDEF of more versions of Padauk and Tahoma. +- New, experimental, cmake alternative build system. + + +Overview of changes leading to 1.4.5 +Friday, March 10, 2017 +==================================== + +- Revert "Fix Context lookup application when moving back after a glyph..." + This introduced memory access problems. To be fixed properly soon. + + +Overview of changes leading to 1.4.4 +Sunday, March 5, 2017 +==================================== + +- Fix Context lookup application when moving back after a glyph deletion. +- Fix buffer-overrun in Bengali. + + +Overview of changes leading to 1.4.3 +Saturday, February 25, 2017 +==================================== + +- Route Adlam script to Arabic shaper. +- Misc fixes. +- New API: + hb_font_set_face() +- Deprecate API: + hb_graphite2_font_get_gr_font() + + +Overview of changes leading to 1.4.2 +Monday, January 23, 2017 +==================================== + +- Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR. +- hb-shape and hb-view now accept --variations. +- New API: + +hb_variation_t +hb_variation_from_string() +hb_variation_to_string() + +hb_font_set_variations() +hb_font_set_var_coords_design() +hb_font_get_var_coords_normalized() + +hb-ot-var.h: +hb_ot_var_axis_t +hb_ot_var_has_data() +hb_ot_var_get_axis_count() +hb_ot_var_get_axes() +hb_ot_var_find_axis() +hb_ot_var_normalize_variations() +hb_ot_var_normalize_coords() + +- MVAR to be implemented later. Access to named instances to be + implemented later as well. + +- Misc fixes. + + +Overview of changes leading to 1.4.1 +Thursday, January 5, 2017 +==================================== + +- Always build and use UCDN for Unicode data by default. + Reduces dependence on version of Unicode data in glib, + specially in the Windows bundles we are shipping, which + have very old glib. + + +Overview of changes leading to 1.4.0 +Thursday, January 5, 2017 +==================================== + +- Merged "OpenType GX" branch which adds core of support for + OpenType 1.8 Font Variations. To that extent, the relevant + new API is: + +New API: +hb_font_set_var_coords_normalized() + + with supporting API: + +New API: +HB_OT_LAYOUT_NO_VARIATIONS_INDEX +hb_ot_layout_table_find_feature_variations() +hb_ot_layout_feature_with_variations_get_lookups() +hb_shape_plan_create2() +hb_shape_plan_create_cached2() + + Currently variations in GSUB/GPOS/GDEF are fully supported, + and no other tables are supported. In particular, fvar/avar + are NOT supported, hence the hb_font_set_var_coords_normalized() + taking normalized coordinates. API to take design coordinates + will be added in the future. + + HVAR/VVAR/MVAR support will also be added to hb-ot-font in the + future. + +- Fix regression in GDEF glyph class processing. +- Add decompositions for Chakma, Limbu, and Balinese in USE shaper. +- Misc fixes. + + +Overview of changes leading to 1.3.4 +Monday, December 5, 2016 +==================================== + +- Fix vertical glyph origin in hb-ot-font. +- Implement CBDT/CBLC color font glyph extents in hb-ot-font. + + +Overview of changes leading to 1.3.3 +Wednesday, September 28, 2016 +==================================== + +- Implement parsing of OpenType MATH table. +New API: +HB_OT_TAG_MATH +HB_OT_MATH_SCRIPT +hb_ot_math_constant_t +hb_ot_math_kern_t +hb_ot_math_glyph_variant_t +hb_ot_math_glyph_part_flags_t +hb_ot_math_glyph_part_t +hb_ot_math_has_data +hb_ot_math_get_constant +hb_ot_math_get_glyph_italics_correction +hb_ot_math_get_glyph_top_accent_attachment +hb_ot_math_get_glyph_kerning +hb_ot_math_is_glyph_extended_shape +hb_ot_math_get_glyph_variants +hb_ot_math_get_min_connector_overlap +hb_ot_math_get_glyph_assembly + + +Overview of changes leading to 1.3.2 +Wednesday, September 27, 2016 +==================================== + +- Fix build of hb-coretext on older OS X versions. + + +Overview of changes leading to 1.3.1 +Wednesday, September 7, 2016 +==================================== + +- Blacklist bad GDEF of more fonts (Padauk). +- More CoreText backend crash fixes with OS X 10.9.5. +- Misc fixes. + + +Overview of changes leading to 1.3.0 +Thursday, July 21, 2016 +==================================== + +- Update to Unicode 9.0.0 +- Move Javanese from Indic shaper to Universal Shaping Engine. +- Allow MultipleSubst to delete a glyph (matching Windows engine). +- Update Universal Shaping Engine to latest draft from Microsoft. +- DirectWrite backend improvements. Note: this backend is for testing ONLY. +- CoreText backend improvements with unreachable fonts. +- Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font. +- Blacklist bad GDEF of more fonts (Tahoma & others). +- Misc fixes. + + +Overview of changes leading to 1.2.7 +Monday, May 2, 2016 +==================================== + +- Blacklist another version of Times New Roman (Bold) Italic from Windows 7. +- Fix Mongolian Free Variation Selectors shaping with certain fonts. +- Fix Tibetan shorthand contractions shaping. +- Improved list of language tag mappings. +- Unbreak build on Windows CE. +- Make 'glyf' table loading lazy in hb-ot-font. + + +Overview of changes leading to 1.2.6 +Friday, April 8, 2016 +==================================== + +- Blacklist GDEF table of another set of Times New Roman (Bold) Italic. +- DirectWrite backend improvements. Note: DirectWrite backend is + exclusively for our internal testing and should NOT be used in any + production system whatsoever. + + +Overview of changes leading to 1.2.5 +Monday, April 4, 2016 +==================================== + +- Fix GDEF mark-filtering-set, which was broken in 1.2.3. + + +Overview of changes leading to 1.2.4 +Thursday, March 17, 2016 +==================================== + +- Synthesize GDEF glyph class for any glyph that does not have one in GDEF. + I really hope we don't discover broken fonts that shape badly with this + change. +- Misc build and other minor fixes. +- API changes: + - Added HB_NDEBUG. It's fine for production systems to define this to + disable high-overhead debugging checks. However, I also reduced the + overhead of those checks, so it's a non-issue right now. You can + forget it. Just not defining anything at all is fine. + + +Overview of changes leading to 1.2.3 +Thursday, February 25, 2016 +==================================== + +- Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic, + due to bug in glyph class of ASCII double-quote character. This should + address "regression" introduced in 1.2.0 when we switched mark zeroing + in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE. + This fourth release in a week should finally stabilize things... + +- hb-ot-font's get_glyph() implementation saw some optimizations. Though, + might be really hard to measure in real-world situations. + +- Also, two rather small API changes: + +We now disable some time-consuming internal bookkeeping if built with NDEBUG +defined. This is a first time that we use NDEBUG to disable debug code. If +there exist production systems that do NOT want to enable NDEBUG, please let +me know and I'll add HB_NDEBUG. + +Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph() + +New API: +- hb_font_get_nominal_glyph_func_t +- hb_font_get_variation_glyph_func_t +- hb_font_funcs_set_nominal_glyph_func() +- hb_font_funcs_set_variation_glyph_func() +- hb_font_get_nominal_glyph() +- hb_font_get_variation_glyph() + +Deprecated API: +- hb_font_get_glyph_func_t +- hb_font_funcs_set_glyph_func() + +Clients that implement their own font-funcs are encouraged to replace +their get_glyph() implementation with a get_nominal_glyph() and +get_variation_glyph() pair. The variation version can assume that +variation_selector argument is not zero. Old (deprecated) functions +will continue working indefinitely using internal gymnastics; it is +just more efficient to use the new functions. + + +Overview of changes leading to 1.2.2 +Wednesday, February 24, 2016 +==================================== + +- Fix regression with mark positioning with fonts that have + non-zero mark advances. This was introduced in 1.2.0 while + trying to make mark and cursive attachments to work together. + I have partially reverted that, so this version is much more + like what we had before. All clients who updated to 1.2.0 + should update to this version. + + +Overview of changes leading to 1.2.1 +Tuesday, February 23, 2016 +==================================== + +- CoreText: Fix bug with wrong scale if font scale was changed later. + https://github.com/libass/libass/issues/212 +- CoreText: Drastically speed up font initialization. +- CoreText: Fix tiny leak. +- Group ZWJ/ZWNJ with previous syllable under cluster-level=0. + https://github.com/harfbuzz/harfbuzz/issues/217 +- Add test/shaping/README.md about how to add tests to the suite. + + +Overview of changes leading to 1.2.0 +Friday, February 19, 2016 +==================================== + +- Fix various issues (hangs mostly) in case of memory allocation failure. +- Change mark zeroing types of most shapers from BY_UNICODE_LATE to + BY_GDEF_LATE. This seems to be what Uniscribe does. +- Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's + what Windows does. +- Allow GPOS cursive connection on marks, and fix the interaction with + mark attachment. This work resulted in some changes to how mark + attachments work. See: + https://github.com/harfbuzz/harfbuzz/issues/211 + https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2 +- Graphite2 shaper: improved negative advance handling (eg. Nastaliq). +- Add nmake-based build system for Windows. +- Minor speedup. +- Misc. improvements. + + +Overview of changes leading to 1.1.3 +Monday, January 11, 2016 +==================================== + +- Ported Indic shaper to Unicode 8.0 data. +- Universal Shaping Engine fixes. +- Speed up CoreText shaper when font fallback happens in CoreText. +- Documentation improvements, thanks to Khaled Hosny. +- Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi. +- Misc bug fixes. +- New API: + + * Font extents: + hb_font_extents_t + hb_font_get_font_extents_func_t + hb_font_get_font_h_extents_func_t + hb_font_get_font_v_extents_func_t + hb_font_funcs_set_font_h_extents_func + hb_font_funcs_set_font_v_extents_func + hb_font_get_h_extents + hb_font_get_v_extents + hb_font_get_extents_for_direction + + * Buffer message (aka debug): + hb_buffer_message_func_t + hb_buffer_set_message_func() + Actual message protocol to be fleshed out later. + + +Overview of changes leading to 1.1.2 +Wednesday, November 26, 2015 +==================================== + +- Fix badly-broken fallback shaper that affected terminology. + https://github.com/harfbuzz/harfbuzz/issues/187 +- Fix y_scaling in Graphite shaper. +- API changes: + * An unset glyph_h_origin() function in font-funcs now (sensibly) + implies horizontal origin at 0,0. Ie, the nil callback returns + true instead of false. As such, implementations that have a + glyph_h_origin() that simply returns true, can remove that function + with HarfBuzz >= 1.1.2. This results in a tiny speedup. + + +Overview of changes leading to 1.1.1 +Wednesday, November 24, 2015 +==================================== + +- Build fixes, specially for hb-coretext. + + +Overview of changes leading to 1.1.0 +Wednesday, November 18, 2015 +==================================== + +- Implement 'stch' stretch feature for Syriac Abbreviation Mark. + https://github.com/harfbuzz/harfbuzz/issues/141 +- Disable use of decompose_compatibility() callback. +- Implement "shaping" of various Unicode space characters, even + if the font does not support them. + https://github.com/harfbuzz/harfbuzz/issues/153 +- If font does not support U+2011 NO-BREAK HYPHEN, fallback to + U+2010 HYPHEN. +- Changes resulting from libFuzzer continuous fuzzing: + * Reject font tables that need more than 8 edits, + * Bound buffer growth during shaping to 32x, + * Fix assertions and other issues at OOM / buffer max-growth. +- Misc fixes and optimizations. +- API changes: + * All fonts created with hb_font_create() now inherit from + (ie. have parent) hb_font_get_empty(). + + +Overview of changes leading to 1.0.6 +Thursday, October 15, 2015 +==================================== + +- Reduce max nesting level in OT lookups from 8 to 6. + Should not affect any real font as far as I know. +- Fix memory access issue in ot-font. +- Revert default load-flags of fonts created using hb_ft_font_create() + back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in + last release (1.0.5), but caused major issues, so revert. + https://github.com/harfbuzz/harfbuzz/issues/143 + + +Overview of changes leading to 1.0.5 +Tuesday, October 13, 2015 +==================================== + +- Fix multiple memory access bugs discovered using libFuzzer. + https://github.com/harfbuzz/harfbuzz/issues/139 + Everyone should upgrade to this version as soon as possible. + We now have continuous fuzzing set up, to avoid issues like + these creeping in again. +- Misc fixes. + +- New API: + * hb_font_set_parent(). + * hb_ft_font_[sg]et_load_flags() + The default flags for fonts created using hb_ft_font_create() + has changed to default to FT_LOAD_DEFAULT now. Previously it + was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING. + +- API changes: + * Fonts now default to units-per-EM as their scale, instead of 0. + * hb_font_create_sub_font() does NOT make parent font immutable + anymore. hb_font_make_immutable() does. + + +Overview of changes leading to 1.0.4 +Wednesday, September 30, 2015 +==================================== + +- Fix minor out-of-bounds read error. + + +Overview of changes leading to 1.0.3 +Tuesday, September 1, 2015 +==================================== + +- Start of user documentation, from Simon Cozens! +- Implement glyph_extents() for TrueType fonts in hb-ot-font. +- Improve GPOS cursive attachments with conflicting lookups. +- More fixes for cluster-level = 1. +- Uniscribe positioning fix. + + +Overview of changes leading to 1.0.2 +Wednesday, August 19, 2015 +==================================== + +- Fix shaping with cluster-level > 0. +- Fix Uniscribe backend font-size scaling. +- Declare dependencies in harfbuzz.pc. + FreeType is not declared though, to avoid bugs in pkg-config + 0.26 with recursive dependencies. +- Slightly improved debug infrastructure. More to come later. +- Misc build fixes. + + +Overview of changes leading to 1.0.1 +Monday, July 27, 2015 +==================================== + +- Fix out-of-bounds access in USE shaper. + + +Overview of changes leading to 1.0.0 +Sunday, July 26, 2015 +==================================== + +- Implement Universal Shaping Engine: + https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm + http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/ +- Bump version to 1.0.0. The soname was NOT bumped. + + +Overview of changes leading to 0.9.42 +Thursday, July 26, 2015 +===================================== + +- New API to allow for retrieving finer-grained cluster + mappings if the client desires to handle them. Default + behavior is unchanged. +- Fix cluster merging when removing default-ignorables. +- Update to Unicode 8.0 +- hb-graphite2 fixes. +- Misc fixes. +- Removed HB_NO_MERGE_CLUSTERS hack. +- New API: + hb_buffer_cluster_level_t enum + hb_buffer_get_cluster_level() + hb_buffer_set_cluster_level() + hb-shape / hb-view --cluster-level + + +Overview of changes leading to 0.9.41 +Thursday, June 18, 2015 +===================================== + +- Fix hb-coretext with trailing whitespace in right-to-left. +- New API: hb_buffer_reverse_range(). +- Allow implementing atomic ops in config.h. +- Fix hb_language_t in language bindings. +- Misc fixes. + + +Overview of changes leading to 0.9.40 +Friday, March 20, 2015 +===================================== + +- Another hb-coretext crasher fix. Ouch! +- Happy Norouz! + + +Overview of changes leading to 0.9.39 +Wednesday, March 4, 2015 +===================================== + +- Critical hb-coretext fixes. +- Optimizations and refactoring; no functional change + expected. +- Misc build fixes. + + +Overview of changes leading to 0.9.38 +Friday, January 23, 2015 +===================================== + +- Fix minor out-of-bounds access in Indic shaper. +- Change New Tai Lue shaping engine from South-East Asian to default, + reflecting change in Unicode encoding model. +- Add hb-shape --font-size. Can take up to two numbers for separate + x / y size. +- Fix CoreText and FreeType scale issues with negative scales. +- Reject blobs larger than 2GB. This might break some icu-le-hb clients + that need security fixes. See: + http://www.icu-project.org/trac/ticket/11450 +- Avoid accessing font tables during face destruction, in casce rogue + clients released face data already. +- Fix up gobject-introspection a bit. Python bindings kinda working. + See README.python. +- Misc fixes. +- API additions: + hb_ft_face_create_referenced() + hb_ft_font_create_referenced() + + +Overview of changes leading to 0.9.37 +Wednesday, December 17, 2014 +===================================== + +- Fix out-of-bounds access in Context lookup format 3. +- Indic: Allow ZWJ/ZWNJ before syllable modifiers. + + +Overview of changes leading to 0.9.36 +Thursday, November 20, 2014 +===================================== + +- First time that three months went by without a release since + 0.9.2 was released on August 10, 2012! +- Fix performance bug in hb_ot_collect_glyphs(): + https://bugzilla.mozilla.org/show_bug.cgi?id=1090869 +- Add basic vertical-text support to hb-ot-font. +- Misc build fixes. + + Overview of changes leading to 0.9.35 Saturday, August 13, 2014 ===================================== @@ -111,7 +1743,7 @@ Wednesday, July 16, 2014 U+FFFD REPLACEMENT CHARACTER now. - With all changes in this release, the buffer will contain fully valid Unicode after hb_buffer_add_utf8/16/32 no matter how - broken the input is. This can be overriden though. See below. + broken the input is. This can be overridden though. See below. - Fix Mongolian Variation Selectors for fonts without GDEF. - Fix minor invalid buffer access. - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language() @@ -718,7 +2350,7 @@ o Changed API: - hb_buffer_create() takes zero arguments now. Use hb_buffer_pre_allocate() to pre-allocate. - - hb_buffer_add_utf*() now accept -1 for length parameteres, + - hb_buffer_add_utf*() now accept -1 for length parameters, meaning "nul-terminated". - hb_direction_t enum values changed.