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-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 Databse 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 stablize 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
-=====================================
-
-- Fix major shape-plan caching bug when more than one shaper were
- provided to hb_shape_full() (as exercised by XeTeX).
- http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
-- Fix Arabic fallback shaping regression. This was broken in 0.9.32.
-- Major hb-coretext fixes. That backend is complete now, including
- respecing buffer direction and language, down to vertical writing.
-- Build fixes for Windows CE. Should build fine now.
-- Misc fixes:
- Use atexit() only if it's safe to call from shared library
- https://bugs.freedesktop.org/show_bug.cgi?id=82246
- Mandaic had errors in its Unicode Joining_Type
- https://bugs.freedesktop.org/show_bug.cgi?id=82306
-- API changes:
-
- * hb_buffer_clear_contents() does not reset buffer flags now.
-
- After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
- need to set flags for different pieces of text. The flags now
- are something the client sets up once, depending on how it
- actually uses the buffer. As such, don't clear it in
- clear_contents().
-
- I don't expect any changes to be needed to any existing client.
-
-
-Overview of changes leading to 0.9.34
-Saturday, August 2, 2014
-=====================================
-
-- hb_feature_from_string() now accepts CSS font-feature-settings format.
-- As a result, hb-shape / hb-view --features also accept CSS-style strings.
- Eg, "'liga' off" is accepted now.
-- Add old-spec Myanmar shaper:
- https://bugs.freedesktop.org/show_bug.cgi?id=81775
-- Don't apply 'calt' in Hangul shaper.
-- Fix mark advance zeroing for Hebrew shaper:
- https://bugs.freedesktop.org/show_bug.cgi?id=76767
-- Implement Windows-1256 custom Arabic shaping. Only built on Windows,
- and requires help from get_glyph(). Used by Firefox.
- https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
-- Disable 'liga' in vertical text.
-- Build fixes.
-- API changes:
-
- * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
-
- Previously, we expected users to provide BOT/EOT flags when the
- text *segment* was at paragraph boundaries. This meant that for
- clients that provide full paragraph to HarfBuzz (eg. Pango), they
- had code like this:
-
- hb_buffer_set_flags (hb_buffer,
- (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
- (item_offset + item_length == paragraph_length ?
- HB_BUFFER_FLAG_EOT : 0));
-
- hb_buffer_add_utf8 (hb_buffer,
- paragraph_text, paragraph_length,
- item_offset, item_length);
-
- After this change such clients can simply say:
-
- hb_buffer_set_flags (hb_buffer,
- HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
-
- hb_buffer_add_utf8 (hb_buffer,
- paragraph_text, paragraph_length,
- item_offset, item_length);
-
- Ie, HarfBuzz itself checks whether the segment is at the beginning/end
- of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
- continue not setting any flags whatsoever.
-
- Another way to put it is: if there's pre-context text in the buffer,
- HarfBuzz ignores the BOT flag. If there's post-context, it ignores
- EOT flag.
-
-
-Overview of changes leading to 0.9.33
-Tuesday, July 22, 2014
-=====================================
-
-- Turn off ARabic 'cswh' feature that was accidentally turned on.
-- Add HB_TAG_MAX_SIGNED.
-- Make hb_face_make_immutable() really make face immutable!
-- Windows build fixes.
-
-
-Overview of changes leading to 0.9.32
-Thursday, July 17, 2014
-=====================================
-
-- Apply Arabic shaping features in spec order exactly.
-- Another fix for Mongolian free variation selectors.
-- For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
- together.
-- Minor adjustment to U+FFFD logic.
-- Fix hb-coretext build.
-
-
-Overview of changes leading to 0.9.31
-Wednesday, July 16, 2014
-=====================================
-
-- Only accept valid UTF-8/16/32; we missed many cases before.
-- Better shaping of invalid UTF-8/16/32. Falls back to
- 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 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()
- now uses these instead of private tags.
-- Build fixes.
-- New API:
- * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
- used to do, ie. no validity check on the input at all. add_utf32
- now replaces invalid Unicode codepoints with the replacement
- character (see below).
- * hb_buffer_set_replacement_codepoint()
- * hb_buffer_get_replacement_codepoint()
- Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
- we detected broken input, we replaced that with (hb_codepoint_t)-1.
- This has changed to use U+FFFD now, but can be changed using these
- new API.
-
-
-Overview of changes leading to 0.9.30
-Wednesday, July 9, 2014
-=====================================
-
-- Update to Unicode 7.0.0:
- * New scripts Manichaean and Psalter Pahlavi are shaped using
- Arabic shaper.
- * All the other new scripts to through the generic shaper for
- now.
-- Minor Indic improvements.
-- Fix graphite2 backend cluster mapping [crasher!]
-- API changes:
- * New HB_SCRIPT_* values for Unicode 7.0 scripts.
- * New function hb_ot_layout_language_get_required_feature().
-- Build fixes.
-
-
-Overview of changes leading to 0.9.29
-Thursday, May 29, 2014
-=====================================
-
-- Implement cmap in hb-ot-font.h. No variation-selectors yet.
-- Myanmar: Allow MedialYa+Asat.
-- Various Indic fixes:
- * Support most characters in Extended Devanagary and Vedic
- Unicode blocks.
- * Allow digits and a some punctuation as consonant placeholders.
-- Build fixes.
-
-
-Overview of changes leading to 0.9.28
-Monday, April 28, 2014
-=====================================
-
-- Unbreak old-spec Indic shaping. (bug 76705)
-- Fix shaping of U+17DD and U+0FC6.
-- Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
- for shipping libraries. It's an option for further experimentation
- right now. When we are sure how to do it properly, we will add
- public run-time API for the functionality.
-- Build fixes.
-
-
-Overview of changes leading to 0.9.27
-Tuesday, March 18, 2014
-=====================================
-
-- Don't use "register" storage class specifier
-- Wrap definition of free_langs() with HAVE_ATEXIT
-- Add coretext_aat shaper and hb_coretext_face_create() constructor
-- If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
-- Add Myanmar test case from OpenType Myanmar spec
-- Only do fallback Hebrew composition if no GPOS 'mark' available
-- Allow bootstrapping without gtk-doc
-- Use AM_MISSING_PROG for ragel and git
-- Typo in ucdn's Makefile.am
-- Improve MemoryBarrier() implementation
-
-
-Overview of changes leading to 0.9.26
-Thursday, January 30, 2014
-=====================================
-
-- Misc fixes.
-- Fix application of 'rtlm' feature.
-- Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
-- New header: hb-ot-shape.h
-- Uniscribe: fix scratch-buffer accounting.
-- Reorder Tai Tham SAKOT to after tone-marks.
-- Add Hangul shaper.
-- New files:
- hb-ot-shape-complex-hangul.cc
- hb-ot-shape-complex-hebrew.cc
- hb-ot-shape-complex-tibetan.cc
-- Disable 'cswh' feature in Arabic shaper.
-- Coretext: better handle surrogate pairs.
-- Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
-
-
-Overview of changes leading to 0.9.25
-Wednesday, December 4, 2013
-=====================================
-
-- Myanmar shaper improvements.
-- Avoid font fallback in CoreText backend.
-- Additional OpenType language tag mappiongs.
-- More aggressive shape-plan caching.
-- Build with / require automake 1.13.
-- Build with libtool 2.4.2.418 alpha to support ppc64le.
-
-
-Overview of changes leading to 0.9.24
-Tuesday, November 13, 2013
-=====================================
-
-- Misc compiler warning fixes with clang.
-- No functional changes.
-
-
-Overview of changes leading to 0.9.23
-Monday, October 28, 2013
-=====================================
-
-- "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
-- Fix (Chain)Context recursion with non-monotone lookup positions.
-- Misc Indic bug fixes.
-- New Javanese / Buginese shaping, similar to Windows 8.1.
-
-
-Overview of changes leading to 0.9.22
-Thursday, October 3, 2013
-=====================================
-
-- Fix use-after-end-of-scope in hb_language_from_string().
-- Fix hiding of default_ignorables if font doesn't have space glyph.
-- Protect against out-of-range lookup indices.
-
-- API Changes:
-
- * Added hb_ot_layout_table_get_lookup_count()
-
-
-Overview of changes leading to 0.9.21
-Monday, September 16, 2013
-=====================================
-
-- Rename gobject-introspection library name from harfbuzz to HarfBuzz.
-- Remove (long disabled) hb-old and hb-icu-le test shapers.
-- Misc gtk-doc and gobject-introspection annotations.
-- Misc fixes.
-- API changes:
-
- * Add HB_SET_VALUE_INVALID
-
-Overview of changes leading to 0.9.20
-Thursday, August 29, 2013
-=====================================
-
-General:
-- Misc substitute_closure() fixes.
-- Build fixes.
-
-Documentation:
-- gtk-doc boilerplate integrated. Docs are built now, but
- contain no contents. By next release hopefully we have
- some content in. Enable using --enable-gtk-doc.
-
-GObject and Introspection:
-- Added harfbuzz-gobject library (hb-gobject.h) that has type
- bindings for all HarfBuzz objects and enums. Enable using
- --with-gobject.
-- Added gobject-introspection boilerplate. Nothing useful
- right now. Work in progress. Gets enabled automatically if
- --with-gobject is used. Override with --disable-introspection.
-
-OpenType shaper:
-- Apply 'mark' in Myanmar shaper.
-- Don't apply 'dlig' by default.
-
-Uniscribe shaper:
-- Support user features.
-- Fix loading of fonts that are also installed on the system.
-- Fix shaping of Arabic Presentation Forms.
-- Fix build with wide chars.
-
-CoreText shaper:
-- Support user features.
-
-Source changes:
-- hb_face_t code moved to hb-face.h / hb-face.cc.
-- Added hb-deprecated.h.
-
-API changes:
-- Added HB_DISABLE_DEPRECATED.
-- Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
- HB_SCRIPT_CANADIAN_SYLLABICS.
-- Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
- HB_BUFFER_FLAG_DEFAULT.
-- Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
- HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
-
-
-Overview of changes leading to 0.9.19
-Tuesday, July 16, 2013
-=====================================
-
-- Build fixes.
-- Better handling of multiple variation selectors in a row.
-- Pass on variation selector to GSUB if not consumed by cmap.
-- Fix undefined memory access.
-- Add Javanese config to Indic shaper.
-- Misc bug fixes.
-
-Overview of changes leading to 0.9.18
-Tuesday, May 28, 2013
-=====================================
-
-New build system:
-
-- All unneeded code is all disabled by default,
-
-- Uniscribe and CoreText shapers can be enabled with their --with options,
-
-- icu_le and old shapers cannot be enabled for now,
-
-- glib, freetype, and cairo will be detected automatically.
- They can be force on/off'ed with their --with options,
-
-- icu and graphite2 are default off, can be enabled with their --with
- options,
-
-Moreover, ICU support is now build into a separate library:
-libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
-Distros can enable ICU now without every application on earth
-getting linked to via libharfbuzz.so.
-
-For distros I recommend that they make sure they are building --with-glib
---with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
-And package harfbuzz and harfbuzz-icu separately.
-
-
-Overview of changes leading to 0.9.17
-Monday, May 20, 2013
-=====================================
-
-- Build fixes.
-- Fix bug in hb_set_get_min().
-- Fix regression with Arabic mark positioning / width-zeroing.
-
-Overview of changes leading to 0.9.16
-Friday, April 19, 2013
-=====================================
-
-- Major speedup in OpenType lookup processing. With the Amiri
- Arabic font, this release is over 3x faster than previous
- release. All scripts / languages should see this speedup.
-
-- New --num-iterations option for hb-shape / hb-view; useful for
- profiling.
-
-Overview of changes leading to 0.9.15
-Friday, April 05, 2013
-=====================================
-
-- Build fixes.
-- Fix crasher in graphite2 shaper.
-- Fix Arabic mark width zeroing regression.
-- Don't compose Hangul jamo into Unicode syllables.
-
-
-Overview of changes leading to 0.9.14
-Thursday, March 21, 2013
-=====================================
-
-- Build fixes.
-- Fix time-consuming sanitize with malicious fonts.
-- Implement hb_buffer_deserialize_glyphs() for both json and text.
-- Do not ignore Hangul filler characters.
-- Indic fixes:
- * Fix Malayalam pre-base reordering interaction with post-forms.
- * Further adjust ZWJ handling. Should fix known regressions from
- 0.9.13.
-
-
-Overview of changes leading to 0.9.13
-Thursday, February 25, 2013
-=====================================
-
-- Build fixes.
-- Ngapi HarfBuzz Hackfest in London (February 2013):
- * Fixed all known Indic bugs,
- * New Win8-style Myanmar shaper,
- * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
- * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
- matching GSUB/GPOS lookups,
- * Fix 'Phags-Pa U+A872 shaping,
- * Fix partial disabling of default-on features,
- * Allow disabling of TrueType kerning.
-- Fix possible crasher with broken fonts with overlapping tables.
-- Removed generated files from git again. So, one needs ragel to
- bootstrap from the git tree.
-
-API changes:
-- hb_shape() and related APIs now abort if buffer direction is
- HB_DIRECTION_INVALID. Previously, hb_shape() was calling
- hb_buffer_guess_segment_properties() on the buffer before
- shaping. The heuristics in that function are fragile. If the
- user really wants the old behvaior, they can call that function
- right before calling hb_shape() to get the old behavior.
-- hb_blob_create_sub_blob() always creates sub-blob with
- HB_MEMORY_MODE_READONLY. See comments for the reason.
-
-
-Overview of changes leading to 0.9.12
-Thursday, January 18, 2013
-=====================================
-
-- Build fixes for Sun compiler.
-- Minor bug fix.
-
-Overview of changes leading to 0.9.11
-Thursday, January 10, 2013
-=====================================
-
-- Build fixes.
-- Fix GPOS mark attachment with null Anchor offsets.
-- [Indic] Fix old-spec reordering of viramas if sequence ends in one.
-- Fix multi-threaded shaper data creation crash.
-- Add atomic ops for Solaris.
-
-API changes:
-- Rename hb_buffer_clear() to hb_buffer_clear_contents().
-
-
-Overview of changes leading to 0.9.10
-Thursday, January 3, 2013
-=====================================
-
-- [Indic] Fixed rendering of Malayalam dot-reph
-- Updated OT language tags.
-- Updated graphite2 backend.
-- Improved hb_ot_layout_get_size_params() logic.
-- Improve hb-shape/hb-view help output.
-- Fixed hb-set.h implementation to not crash.
-- Fixed various issues with hb_ot_layout_collect_lookups().
-- Various build fixes.
-
-New API:
-
-hb_graphite2_face_get_gr_face()
-hb_graphite2_font_get_gr_font()
-hb_coretext_face_get_cg_font()
-
-Modified API:
-
-hb_ot_layout_get_size_params()
-
-
-Overview of changes leading to 0.9.9
-Wednesday, December 5, 2012
-====================================
-
-- Fix build on Windows.
-- Minor improvements.
-
-
-Overview of changes leading to 0.9.8
-Tuesday, December 4, 2012
-====================================
-
-
-- Actually implement hb_shape_plan_get_shaper ().
-- Make UCDB data tables const.
-- Lots of internal refactoring in OTLayout tables.
-- Flesh out hb_ot_layout_lookup_collect_glyphs().
-
-New API:
-
-hb_ot_layout_collect_lookups()
-hb_ot_layout_get_size_params()
-
-
-Overview of changes leading to 0.9.7
-Sunday, November 21, 2012
-====================================
-
-
-HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
-
-- Fix Arabic contextual joining using pre-context text.
-- Fix Sinhala "split matra" mess.
-- Fix Khmer shaping with broken fonts.
-- Implement Thai "PUA" shaping for old fonts.
-- Do NOT route Kharoshthi script through the Indic shaper.
-- Disable fallback positioning for Indic and Thai shapers.
-- Misc fixes.
-
-
-hb-shape / hb-view changes:
-
-- Add --text-before and --text-after
-- Add --bot / --eot / --preserve-default-ignorables
-- hb-shape --output-format=json
-
-
-New API:
-
-hb_buffer_clear()
-
-hb_buffer_flags_t
-
-HB_BUFFER_FLAGS_DEFAULT
-HB_BUFFER_FLAG_BOT
-HB_BUFFER_FLAG_EOT
-HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
-
-hb_buffer_set_flags()
-hb_buffer_get_flags()
-
-HB_BUFFER_SERIALIZE_FLAGS
-hb_buffer_serialize_glyphs()
-hb_buffer_deserialize_glyphs()
-hb_buffer_serialize_list_formats()
-
-hb_set_add_range()
-hb_set_del_range()
-hb_set_get_population()
-hb_set_next_range()
-
-hb_face_[sg]et_glyph_count()
-
-hb_segment_properties_t
-HB_SEGMENT_PROPERTIES_DEFAULT
-hb_segment_properties_equal()
-hb_segment_properties_hash()
-
-hb_buffer_set_segment_properties()
-hb_buffer_get_segment_properties()
-
-hb_ot_layout_glyph_class_t
-hb_ot_layout_get_glyph_class()
-hb_ot_layout_get_glyphs_in_class()
-
-hb_shape_plan_t
-hb_shape_plan_create()
-hb_shape_plan_create_cached()
-hb_shape_plan_get_empty()
-hb_shape_plan_reference()
-hb_shape_plan_destroy()
-hb_shape_plan_set_user_data()
-hb_shape_plan_get_user_data()
-hb_shape_plan_execute()
-hb_shape_plan_get_shaper()
-
-hb_ot_shape_plan_collect_lookups()
-
-
-API changes:
-
-- Remove "mask" parameter from hb_buffer_add().
-- Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
-- hb-set.h API const correction.
-- Renamed hb_set_min/max() to hb_set_get_min/max().
-- Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
-- Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
-
-
-
-Overview of changes leading to 0.9.6
-Sunday, November 13, 2012
-====================================
-
-- Don't clear pre-context text if no new context is provided.
-- Fix ReverseChainingSubstLookup, which was totally borked.
-- Adjust output format of hb-shape a bit.
-- Include config.h.in in-tree. Makes it easier for alternate build systems.
-- Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
-- Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
-- Drop glyphs for all of Unicode Default_Ignorable characters.
-- Misc build fixes.
-
-Arabic shaper:
-- Enable 'dlig' and 'mset' features in Arabic shaper.
-- Implement 'Phags-pa shaping, improve Mongolian.
-
-Indic shaper:
-- Decompose Sinhala split matras the way old HarfBuzz / Pango did.
-- Initial support for Consonant Medials.
-- Start adding new-style Myanmar shaping.
-- Make reph and 'pref' logic introspect the font.
-- Route Meetei-Mayek through the Indic shaper.
-- Don't apply 'liga' in Indic shaper.
-- Improve Malayalam pre-base reordering Ra interaction with Chillus.
-
-
-
-Overview of changes leading to 0.9.5
-Sunday, October 14, 2012
-====================================
-
-- Synthetic-GSUB Arabic fallback shaping.
-
-- Misc Indic improvements.
-
-- Add build system support for pthread.
-
-- Imported UCDN for in-tree Unicode callbacks implementation.
-
-- Context-aware Arabic joining.
-
-- Misc other fixes.
-
-- New API:
-
- hb_feature_to/from-string()
- hb_buffer_[sg]et_content_type()
-
-
-
-Overview of changes leading to 0.9.4
-Tuesday, Sep 03, 2012
-====================================
-
-- Indic improvements with old-spec Malayalam.
-
-- Better fallback glyph positioning, specially with Thai / Lao marks.
-
-- Implement dotted-circle insertion.
-
-- Better Arabic fallback shaping / ligation.
-
-- Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
-
-- Misc fixes.
-
-
-
-Overview of changes leading to 0.9.3
-Friday, Aug 18, 2012
-====================================
-
-- Fixed fallback mark positioning for left-to-right text.
-
-- Improve mark positioning for the remaining combining classes.
-
-- Unbreak Thai and fallback Arabic shaping.
-
-- Port Arabic shaper to shape-plan caching.
-
-- Use new ICU normalizer functions.
-
-
-
-Overview of changes leading to 0.9.2
-Friday, Aug 10, 2012
-====================================
-
-- Over a thousand commits! This is the first major release of HarfBuzz.
-
-- HarfBuzz is feature-complete now! It should be in par, or better, than
- both Pango's shapers and old HarfBuzz / Qt shapers.
-
-- New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
-
-- Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
- Sinhala, N'ko, Mongolian, and Mandaic.
-
-- New Thai / Lao shaper.
-
-- Tibetan / Hangul support in the generic shaper.
-
-- Synthetic GDEF support for fonts without a GDEF table.
-
-- Fallback mark positioning for fonts without a GPOS table.
-
-- Unicode normalization shaping heuristic during glyph mapping.
-
-- New experimental Graphite2 backend.
-
-- New Uniscribe backend (primarily for testing).
-
-- New CoreText backend (primarily for testing).
-
-- Major optimization and speedup.
-
-- Test suites and testing infrastructure (work in progress).
-
-- Greatly improved hb-view cmdline tool.
-
-- hb-shape cmdline tool.
-
-- Unicode 6.1 support.
-
-Summary of API changes:
-
-o Changed API:
-
- - Users are expected to only include main header files now (ie. hb.h,
- hb-glib.h, hb-ft.h, ...)
-
- - All struct tag names had their initial underscore removed.
- Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
-
- - All set_user_data() functions now take a "replace" boolean parameter.
-
- - 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,
- meaning "nul-terminated".
-
- - hb_direction_t enum values changed.
-
- - All *_from_string() APIs now take a length parameter to allow for
- non-nul-terminated strings. A -1 length means "nul-terminated".
-
- - Typedef for hb_language_t changed.
-
- - hb_get_table_func_t renamed to hb_reference_table_func_t.
-
- - hb_ot_layout_table_choose_script()
-
- - Various renames in hb-unicode.h.
-
-o New API:
-
- - hb_buffer_guess_properties()
- Automatically called by hb_shape().
-
- - hb_buffer_normalize_glyphs()
-
- - hb_tag_from_string()
-
- - hb-coretext.h
-
- - hb-uniscribe.h
-
- - hb_face_reference_blob()
- - hb_face_[sg]et_index()
- - hb_face_set_upem()
-
- - hb_font_get_glyph_name_func_t
- hb_font_get_glyph_from_name_func_t
- hb_font_funcs_set_glyph_name_func()
- hb_font_funcs_set_glyph_from_name_func()
- hb_font_get_glyph_name()
- hb_font_get_glyph_from_name()
- hb_font_glyph_to_string()
- hb_font_glyph_from_string()
-
- - hb_font_set_funcs_data()
-
- - hb_ft_font_set_funcs()
- - hb_ft_font_get_face()
-
- - hb-gobject.h (work in progress)
-
- - hb_ot_shape_glyphs_closure()
- hb_ot_layout_substitute_closure_lookup()
-
- - hb-set.h
-
- - hb_shape_full()
-
- - hb_unicode_combining_class_t
-
- - hb_unicode_compose_func_t
- hb_unicode_decompose_func_t
- hb_unicode_decompose_compatibility_func_t
- hb_unicode_funcs_set_compose_func()
- hb_unicode_funcs_set_decompose_func()
- hb_unicode_funcs_set_decompose_compatibility_func()
- hb_unicode_compose()
- hb_unicode_decompose()
- hb_unicode_decompose_compatibility()
-
-o Removed API:
-
- - hb_ft_get_font_funcs()
-
- - hb_ot_layout_substitute_start()
- hb_ot_layout_substitute_lookup()
- hb_ot_layout_substitute_finish()
- hb_ot_layout_position_start()
- hb_ot_layout_position_lookup()
- hb_ot_layout_position_finish()
-
-
-
-Overview of changes leading to 0.6.0
-Friday, May 27, 2011
-====================================
-
-- Vertical text support in GPOS
-- Almost all API entries have unit tests now, under test/
-- All thread-safety issues are fixed
-
-Summary of API changes follows.
-
-
-* Simple Types API:
-
- o New API:
- HB_LANGUAGE_INVALID
- hb_language_get_default()
- hb_direction_to_string()
- hb_direction_from_string()
- hb_script_get_horizontal_direction()
- HB_UNTAG()
-
- o Renamed API:
- hb_category_t renamed to hb_unicode_general_category_t
-
- o Changed API:
- hb_language_t is a typed pointers now
-
- o Removed API:
- HB_TAG_STR()
-
-
-* Use ISO 15924 tags for hb_script_t:
-
- o New API:
- hb_script_from_iso15924_tag()
- hb_script_to_iso15924_tag()
- hb_script_from_string()
-
- o Changed API:
- HB_SCRIPT_* enum members changed value.
-
-
-* Buffer API streamlined:
-
- o New API:
- hb_buffer_reset()
- hb_buffer_set_length()
- hb_buffer_allocation_successful()
-
- o Renamed API:
- hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
- hb_buffer_add_glyph() renamed to hb_buffer_add()
-
- o Removed API:
- hb_buffer_clear()
- hb_buffer_clear_positions()
-
- o Changed API:
- hb_buffer_get_glyph_infos() takes an out length parameter now
- hb_buffer_get_glyph_positions() takes an out length parameter now
-
-
-* Blob API streamlined:
-
- o New API:
- hb_blob_get_data()
- hb_blob_get_data_writable()
-
- o Renamed API:
- hb_blob_create_empty() renamed to hb_blob_get_empty()
-
- o Removed API:
- hb_blob_lock()
- hb_blob_unlock()
- hb_blob_is_writable()
- hb_blob_try_writable()
-
- o Changed API:
- hb_blob_create() takes user_data before destroy now
-
-
-* Unicode functions API:
-
- o Unicode function vectors can subclass other unicode function vectors now.
- Unimplemented callbacks in the subclass automatically chainup to the parent.
-
- o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
- take a user_data and its respective destroy callback.
-
- o New API:
- hb_unicode_funcs_get_empty()
- hb_unicode_funcs_get_default()
- hb_unicode_funcs_get_parent()
-
- o Changed API:
- hb_unicode_funcs_create() now takes a parent_funcs.
-
- o Removed func getter functions:
- hb_unicode_funcs_get_mirroring_func()
- hb_unicode_funcs_get_general_category_func()
- hb_unicode_funcs_get_script_func()
- hb_unicode_funcs_get_combining_class_func()
- hb_unicode_funcs_get_eastasian_width_func()
-
-
-* Face API:
-
- o Renamed API:
- hb_face_get_table() renamed to hb_face_reference_table()
- hb_face_create_for_data() renamed to hb_face_create()
-
- o Changed API:
- hb_face_create_for_tables() takes user_data before destroy now
- hb_face_reference_table() returns empty blob instead of NULL
- hb_get_table_func_t accepts the face as first parameter now
-
-* Font API:
-
- o Fonts can subclass other fonts now. Unimplemented callbacks in the
- subclass automatically chainup to the parent. When chaining up,
- scale is adjusted if the parent font has a different scale.
-
- o All hb_font_funcs_t callbacks take a user_data now. Their setters
- take a user_data and its respective destroy callback.
-
- o New API:
- hb_font_get_parent()
- hb_font_funcs_get_empty()
- hb_font_create_sub_font()
-
- o Removed API:
- hb_font_funcs_copy()
- hb_font_unset_funcs()
-
- o Removed func getter functions:
- hb_font_funcs_get_glyph_func()
- hb_font_funcs_get_glyph_advance_func()
- hb_font_funcs_get_glyph_extents_func()
- hb_font_funcs_get_contour_point_func()
- hb_font_funcs_get_kerning_func()
-
- o Changed API:
- hb_font_create() takes a face and references it now
- hb_font_set_funcs() takes user_data before destroy now
- hb_font_set_scale() accepts signed integers now
- hb_font_get_contour_point_func_t now takes glyph first, then point_index
- hb_font_get_glyph_func_t returns a success boolean now
-
-
-* Changed object model:
-
- o All object types have a _get_empty() now:
- hb_blob_get_empty()
- hb_buffer_get_empty()
- hb_face_get_empty()
- hb_font_get_empty()
- hb_font_funcs_get_empty()
- hb_unicode_funcs_get_empty()
-
- o Added _set_user_data() and _get_user_data() for all object types:
- hb_blob_get_user_data()
- hb_blob_set_user_data()
- hb_buffer_get_user_data()
- hb_buffer_set_user_data()
- hb_face_get_user_data()
- hb_face_set_user_data()
- hb_font_funcs_get_user_data()
- hb_font_funcs_set_user_data()
- hb_font_get_user_data()
- hb_font_set_user_data()
- hb_unicode_funcs_get_user_data()
- hb_unicode_funcs_set_user_data()
-
- o Removed the _get_reference_count() from all object types:
- hb_blob_get_reference_count()
- hb_buffer_get_reference_count()
- hb_face_get_reference_count()
- hb_font_funcs_get_reference_count()
- hb_font_get_reference_count()
- hb_unicode_funcs_get_reference_count()
-
- o Added _make_immutable() and _is_immutable() for all object types except for buffer:
- hb_blob_make_immutable()
- hb_blob_is_immutable()
- hb_face_make_immutable()
- hb_face_is_immutable()
-
-
-* Changed API for vertical text support
-
- o The following callbacks where removed:
- hb_font_get_glyph_advance_func_t
- hb_font_get_kerning_func_t
-
- o The following new callbacks added instead:
- hb_font_get_glyph_h_advance_func_t
- hb_font_get_glyph_v_advance_func_t
- hb_font_get_glyph_h_origin_func_t
- hb_font_get_glyph_v_origin_func_t
- hb_font_get_glyph_h_kerning_func_t
- hb_font_get_glyph_v_kerning_func_t
-
- o The following API removed as such:
- hb_font_funcs_set_glyph_advance_func()
- hb_font_funcs_set_kerning_func()
- hb_font_get_glyph_advance()
- hb_font_get_kerning()
-
- o New API added instead:
- hb_font_funcs_set_glyph_h_advance_func()
- hb_font_funcs_set_glyph_v_advance_func()
- hb_font_funcs_set_glyph_h_origin_func()
- hb_font_funcs_set_glyph_v_origin_func()
- hb_font_funcs_set_glyph_h_kerning_func()
- hb_font_funcs_set_glyph_v_kerning_func()
- hb_font_get_glyph_h_advance()
- hb_font_get_glyph_v_advance()
- hb_font_get_glyph_h_origin()
- hb_font_get_glyph_v_origin()
- hb_font_get_glyph_h_kerning()
- hb_font_get_glyph_v_kerning()
-
- o The following higher-leve API added for convenience:
- hb_font_get_glyph_advance_for_direction()
- hb_font_get_glyph_origin_for_direction()
- hb_font_add_glyph_origin_for_direction()
- hb_font_subtract_glyph_origin_for_direction()
- hb_font_get_glyph_kerning_for_direction()
- hb_font_get_glyph_extents_for_origin()
- hb_font_get_glyph_contour_point_for_origin()
-
-
-* OpenType Layout API:
-
- o New API:
- hb_ot_layout_position_start()
- hb_ot_layout_substitute_start()
- hb_ot_layout_substitute_finish()
-
-
-* Glue code:
-
- o New API:
- hb_glib_script_to_script()
- hb_glib_script_from_script()
- hb_icu_script_to_script()
- hb_icu_script_from_script()
-
-
-* Version API added:
-
- o New API:
- HB_VERSION_MAJOR
- HB_VERSION_MINOR
- HB_VERSION_MICRO
- HB_VERSION_STRING
- HB_VERSION_CHECK()
- hb_version()
- hb_version_string()
- hb_version_check()
-
-