+Overview of changes leading to 8.2.2
+Wednesday, October 18, 2023
+“From the river to the sea, Palestine will be free”
+====================================
+- Fix regression from 8.1.0 in shaping fonts with duplicate feature tags.
+- Fix regression from 8.2.0 in parsing CSS-style feature strings.
+- Variable fonts instanciation now handles more tables.
+- Various CMake build improvements.
+- various fixes to build without errors with gcc 4.9.2.
+
+
+Overview of changes leading to 8.2.1
+Monday, September 18, 2023
+====================================
+- Unicode 15.1 support.
+
+
+Overview of changes leading to 8.2.0
+Friday, September 8, 2023
+====================================
+- Various build and fuzzing fixes
+- Improvements to COLRv1 painting.
+
+- New API:
++hb_paint_color_glyph_func_t
++hb_paint_funcs_set_color_glyph_func
++hb_paint_color_glyph
+
+
+Overview of changes leading to 8.1.1
+Wednesday, August 2, 2023
+====================================
+- Fix shaping of contextual rules at the end of string, introduced in 8.1.0
+- Fix stack-overflow in repacker with malicious fonts.
+- 30% speed up loading Noto Duployan font.
+
+
+Overview of changes leading to 8.1.0
+Tuesday, August 1, 2023
+====================================
+- Fix long-standing build issue with the AIX compiler and older Apple clang.
+
+- Revert optimization that could cause timeout during subsetting with malicious fonts.
+
+- More optimization work:
+ - 45% speed up in shaping Noto Duployan font.
+ - 10% speed up in subsetting Noto Duployan font.
+ - Another 8% speed up in shaping Gulzar.
+ - 5% speed up in loading Roboto.
+
+- New API:
++hb_ot_layout_collect_features_map()
+
+
+Overview of changes leading to 8.0.1
+Wednesday, July 12, 2023
+====================================
+- Build fix on 32-bit ARM.
+
+- More speed optimizations:
+ - 60% speed up in retain-gid (used for IFT) subsetting of SourceHanSans-VF.
+ - 16% speed up in retain-gid (used for IFT) subsetting of NotoSansCJKkr.
+ - 38% speed up in subsetting (beyond-64k) mega-merged Noto.
+
+
+Overview of changes leading to 8.0.0
+Sunday, July 9, 2023
+====================================
+- New, experimental, WebAssembly (WASM) shaper, that provides greater
+ flexibility over OpenType/AAT/Graphite shaping, using WebAssembly embedded
+ inside the font file. Currently WASM shaper is disabled by default and needs
+ to be enabled at build time. For details, see:
+
+ https://github.com/harfbuzz/harfbuzz/blob/main/docs/wasm-shaper.md
+
+ For example fonts making use of the WASM shaper, see:
+
+ https://github.com/harfbuzz/harfbuzz-wasm-examples
+
+- Improvements to Experimental features introduced in earlier releases:
+ - Support for subsetting beyond-64k and VarComposites fonts.
+ - Support for instancing variable fonts with cubic “glyf” table.
+
+- Many big speed optimizations:
+ - Up to 89% speedup loading variable fonts for shaping.
+ - Up to 88% speedup in small subsets of large (eg. CJK) fonts (both TTF and
+ OTF), essential for Incremental Font Transfer (IFT).
+ - Over 50% speedup in loading Roboto font for shaping.
+ - Up to 40% speed up in loading (sanitizing) complex fonts.
+ - 30% speed up in shaping Gulzar font.
+ - Over 25% speedup in glyph loading Roboto font.
+ - 10% speed up loading glyph shapes in VarComposite Hangul font.
+ - hb-hashmap optimizations & hashing improvements.
+
+- New macro HB_ALWAYS_INLINE. HarfBuzz now inlines functions more aggressively,
+ which results in some speedup at the expense of bigger code size. To disable
+ this feature define the macro to just inline.
+
+- New API:
++HB_CODEPOINT_INVALID
++hb_ot_layout_get_baseline2()
++hb_ot_layout_get_baseline_with_fallback2()
++hb_ot_layout_get_font_extents()
++hb_ot_layout_get_font_extents2()
++hb_subset_input_set_axis_range()
+
+
+Overview of changes leading to 7.3.0
+Tuesday, May 9, 2023
+====================================
+- Speedup applying glyph variation in VarComposites fonts (over 40% speedup).
+ (Behdad Esfahbod)
+- Speedup instancing some fonts (over 20% speedup in instancing RobotoFlex).
+ (Behdad Esfahbod)
+- Speedup shaping some fonts (over 30% speedup in shaping Roboto).
+ (Behdad Esfahbod)
+- Support subsetting VarComposites and beyond-64k fonts. (Behdad Esfahbod)
+- New configuration macro HB_MINIMIZE_MEMORY_USAGE to favor optimizing memory
+ usage over speed. (Behdad Esfahbod)
+- Supporting setting the mapping between old and new glyph indices during
+ subsetting. (Garret Rieger)
+- Various fixes and improvements.
+ (Behdad Esfahbod, Denis Rochette, Garret Rieger, Han Seung Min, Qunxin Liu)
+
+- New API:
++hb_subset_input_old_to_new_glyph_mapping()
+
+
+Overview of changes leading to 7.2.0
+Thursday, April 27, 2023
+====================================
+- Add Tifinagh to the list of scripts that can natively be either right-to-left
+ or left-to-right, to improve handling of its glyph positioning.
+ (Simon Cozens)
+- Return also single substitution from hb_ot_layout_lookup_get_glyph_alternates()
+ (Behdad Esfahbod)
+- Fix 4.2.0 regression in applying across syllables in syllabic scripts.
+ (Behdad Esfahbod)
+- Add flag to avoid glyph substitution closure during subsetting, and the
+ corresponding “--no-layout-closure” option to “hb-subset” command line tool.
+ (Garret Rieger)
+- Support instancing COLRv1 table. (Qunxin Liu)
+- Don’t drop used user-defined name table entries during subsetting.
+ (Qunxin Liu)
+- Optimize handling of “gvar” table. (Behdad Esfahbod)
+- Various subsetter bug fixes and improvements. (Garret Rieger, Qunxin Liu)
+- Various documentation improvements. (Behdad Esfahbod, Josef Friedrich)
+
+- New API:
++HB_SUBSET_FLAGS_NO_LAYOUT_CLOSURE
++HB_UNICODE_COMBINING_CLASS_CCC132
+
+- Deprecated API:
++HB_UNICODE_COMBINING_CLASS_CCC133
+
+
+Overview of changes leading to 7.1.0
+Friday, March 3, 2023
+====================================
+- New experimental hb_shape_justify() API that uses font variations to expand
+ or shrink the text to a given advance. (Behdad Esfahbod)
+- Various build and bug fixes. (Behdad Esfahbod, Garret Rieger, Qunxin Liu)
+
+- New API:
++hb_font_set_variation()
+
+
+Overview of changes leading to 7.0.1
+Monday, February 20, 2023
+====================================
+- Various build and bug fixes.
+
+
+Overview of changes leading to 7.0.0
+Saturday, February 11, 2023
+====================================
+- New hb-paint API that is designed mainly to paint “COLRv1” glyphs, but can be
+ also used as a unified API to paint any of the glyph representations
+ supported by HarfBuzz (B/W outlines, color layers, or color bitmaps).
+ (Behdad Esfahbod, Matthias Clasen)
+- New hb-cairo API for integrating with cairo graphics library. This is provided
+ as a separate harfbuzz-cairo library. (Behdad Esfahbod, Matthias Clasen)
+- Support for instancing “CFF2” table. (Behdad Esfahbod)
+- Support font emboldening. (Behdad Esfahbod)
+- Support feature ranges with AAT shaping. (Behdad Esfahbod)
+- Experimental support to cubic curves in “glyf” table, see
+ https://github.com/harfbuzz/boring-expansion-spec/blob/main/glyf1-cubicOutlines.md
+ for spec. (Behdad Esfahbod)
+- Various subsetter improvements. (Garret Rieger, Qunxin Liu, Behdad Esfahbod)
+- Various documentation improvements.
+ (Behdad Esfahbod, Matthias Clasen, Khaled Hosny)
+- Significantly reduced memory use during shaping. (Behdad Esfahbod)
+- Greatly reduced memory use during subsetting “CFF” table. (Behdad Esfahbod)
+- New command line utility, hb-info, for querying various font information.
+ (Behdad Esfahbod, Matthias Clasen)
+- New hb-shape/hb-view options: --glyphs, --color-palette, --font-bold,
+ --font-grade, and --named-instance. (Behdad Esfahbod)
+- Miscellaneous fixes and improvements.
+ (Amir Masoud Abdol, Andres Salomon, Behdad Esfahbod, Chun-wei Fan,
+ Garret Rieger, Jens Kutilek, Khaled Hosny, Konstantin Käfer, Matthias Clasen,
+ Nirbheek Chauhan, Pedro J. Estébanez, Qunxin Liu, Sergei Trofimovich)
+
+- New API:
++HB_FONT_NO_VAR_NAMED_INSTANCE
++HB_PAINT_IMAGE_FORMAT_BGRA
++HB_PAINT_IMAGE_FORMAT_PNG
++HB_PAINT_IMAGE_FORMAT_SVG
++hb_cairo_font_face_create_for_face
++hb_cairo_font_face_create_for_font
++hb_cairo_font_face_get_face
++hb_cairo_font_face_get_font
++hb_cairo_font_face_get_scale_factor
++hb_cairo_font_face_set_font_init_func
++hb_cairo_font_face_set_scale_factor
++hb_cairo_font_init_func_t
++hb_cairo_glyphs_from_buffer
++hb_cairo_scaled_font_get_font
++hb_color_line_get_color_stops
++hb_color_line_get_color_stops_func_t
++hb_color_line_get_extend
++hb_color_line_get_extend_func_t
++hb_color_line_t
++hb_color_stop_t
++hb_draw_funcs_get_empty
++hb_draw_funcs_get_user_data
++hb_draw_funcs_set_user_data
++hb_face_collect_nominal_glyph_mapping
++hb_font_draw_glyph
++hb_font_draw_glyph_func_t
++hb_font_funcs_set_draw_glyph_func
++hb_font_funcs_set_paint_glyph_func
++hb_font_get_synthetic_bold
++hb_font_get_var_named_instance
++hb_font_paint_glyph
++hb_font_paint_glyph_func_t
++hb_font_set_synthetic_bold
++hb_map_keys
++hb_map_next
++hb_map_update
++hb_map_values
++hb_ot_color_glyph_has_paint
++hb_ot_color_has_paint
++hb_ot_layout_script_select_language2
++hb_ot_name_id_predefined_t
++hb_paint_color
++hb_paint_color_func_t
++hb_paint_composite_mode_t
++hb_paint_custom_palette_color
++hb_paint_custom_palette_color_func_t
++hb_paint_extend_t
++hb_paint_funcs_create
++hb_paint_funcs_destroy
++hb_paint_funcs_get_empty
++hb_paint_funcs_get_user_data
++hb_paint_funcs_is_immutable
++hb_paint_funcs_make_immutable
++hb_paint_funcs_reference
++hb_paint_funcs_set_color_func
++hb_paint_funcs_set_custom_palette_color_func
++hb_paint_funcs_set_image_func
++hb_paint_funcs_set_linear_gradient_func
++hb_paint_funcs_set_pop_clip_func
++hb_paint_funcs_set_pop_group_func
++hb_paint_funcs_set_pop_transform_func
++hb_paint_funcs_set_push_clip_glyph_func
++hb_paint_funcs_set_push_clip_rectangle_func
++hb_paint_funcs_set_push_group_func
++hb_paint_funcs_set_push_transform_func
++hb_paint_funcs_set_radial_gradient_func
++hb_paint_funcs_set_sweep_gradient_func
++hb_paint_funcs_set_user_data
++hb_paint_funcs_t
++hb_paint_image
++hb_paint_image_func_t
++hb_paint_linear_gradient
++hb_paint_linear_gradient_func_t
++hb_paint_pop_clip
++hb_paint_pop_clip_func_t
++hb_paint_pop_group
++hb_paint_pop_group_func_t
++hb_paint_pop_transform
++hb_paint_pop_transform_func_t
++hb_paint_push_clip_glyph
++hb_paint_push_clip_glyph_func_t
++hb_paint_push_clip_rectangle
++hb_paint_push_clip_rectangle_func_t
++hb_paint_push_group
++hb_paint_push_group_func_t
++hb_paint_push_transform
++hb_paint_push_transform_func_t
++hb_paint_radial_gradient
++hb_paint_radial_gradient_func_t
++hb_paint_sweep_gradient
++hb_paint_sweep_gradient_func_t
++hb_set_is_inverted
++hb_subset_input_keep_everything
+
+- Deprecated API:
++hb_font_funcs_set_glyph_shape_func
++hb_font_get_glyph_shape_func_t
++hb_font_get_glyph_shape
+
+
+Overview of changes leading to 6.0.0
+Friday, December 16, 2022
+====================================
+- A new API have been added to pre-process the face and speed up future
+ subsetting operations on that face. Provides up to a 95% reduction in
+ subsetting times when the same face is subset more than once.
+
+ For more details and benchmarks, see:
+ https://github.com/harfbuzz/harfbuzz/blob/main/docs/subset-preprocessing.md
+
+ (Garret Rieger, Behdad Esfahbod)
+
+- Shaping have been speedup by skipping entire lookups when the buffer contents
+ don't intersect with the lookup. Shows up to a 10% speedup in shaping some
+ fonts. (Behdad Esfahbod)
+
+- A new experimental feature, “Variable Composites” (enabled by passing
+ -Dexperimental_api=true to meson), is also featured in this release.
+ This technology enables drastic compression of fonts in the Chinese,
+ Japanese, Korean, and other writing systems, by reusing the OpenType Font
+ Variations technology for encoding “smart components” into the font.
+
+ The specification for these extensions to the font format can be found in:
+ https://github.com/harfbuzz/boring-expansion-spec/blob/glyf1/glyf1.md
+
+ A test variable-font with ~7160 Hangul syllables derived from the
+ NotoSerifKR-VF font has been built, with existing OpenType technology, as
+ well as with the new Variable Composites (VarComposites) technology. The
+ VarComposites font is over 90% smaller than the OpenType version of the font!
+ Both fonts can be obtained from the “smarties” repository:
+ https://github.com/behdad/smarties/tree/3.0/fonts/hangul/serif
+
+ When building HarfBuzz with experimental features enabled, you can test
+ the “smarties” font with a sample character like this:
+
+ $ hb-view butchered-hangul-serif-smarties-variable.ttf -u AE01 --variations=wght=700
+
+ (Behdad Esfahbod)
+
+- The HarfBuzz subsetter can now drop axes by pinning them to specific values
+ (also referred to as instancing). There are a couple of restrictions
+ currently:
+
+ - Only works with TrueType (“glyf”) based fonts. “CFF2” fonts are not yet
+ supported.
+ - Only supports the case where all axes in a font are pinned.
+
+ (Garret Rieger, Qunxin Liu)
+
+- Miscellaneous fixes and improvements.
+
+ (Behdad Esfahbod, Christoph Reiter, David Corbett, Eli Schwartz, Garret
+ Rieger, Joel Auterson, Jordan Petridis, Khaled Hosny, Lorenz Wildberg,
+ Marco Rebhan, Martin Storsjö, Matthias Clasen, Qunxin Liu, Satadru Pramanik)
+
+
+- New API
++hb_subset_input_pin_axis_location()
++hb_subset_input_pin_axis_to_default()
++hb_subset_preprocess()
+
+
+Overview of changes leading to 5.3.1
+Wednesday, October 19, 2022
+====================================
+- Subsetter repacker fixes. (Garret Rieger)
+- Adjust Grapheme clusters for Katakana voiced sound marks. (Behdad Esfahbod)
+- New “hb-subset” option “--preprocess-face”. (Garret Rieger)
+
+
+Overview of changes leading to 5.3.0
+Saturday, October 8, 2022
+"Women, Life, Freedom" #MahsaAmini
+====================================
+- Don’t add glyphs from dropped MATH or COLR tables to the subset glyphs.
+ (Khaled Hosny)
+- Map “rlig” to appropriate AAT feature selectors. (Jonathan Kew)
+- Update USE data files to latest version. (David Corbett)
+- Check “CBDT” extents first before outline tables, to help with fonts that
+ also include an empty “glyf” table. (Khaled Hosny)
+- More work towards variable font instancing in the subsetter. (Qunxin Liu)
+- Subsetter repacker improvements. (Garret Rieger)
+- New API:
++hb_ot_layout_lookup_get_optical_bound()
++hb_face_builder_sort_tables()
+
+
+Overview of changes leading to 5.2.0
+Saturday, September 17, 2022
+====================================
+- Fix regressions in hb-ft font functions for FT_Face’s with transformation
+ matrix. (Behdad Esfahbod)
+- The experimental hb-repacker API now supports splitting several GPOS subtable
+ types when needed. (Garret Rieger)
+- The HarfBuzz extensions to OpenType font format are now opt-in behind
+ build-time flags. (Behdad Esfahbod)
+- The experimental hb-subset variable fonts instantiation API can now
+ instantiate more font tables and arbitrary axis locations. (Qunxin Liu)
+- Unicode 15 support. (David Corbett)
+- Various documentation improvements. (Behdad Esfahbod, Matthias Clasen)
+- The hb-view command line tool now detects WezTerm inline images support.
+ (Wez Furlong)
+- Fix FreeType and ICU dependency lookup with meson. (Xavier Claessens)
+
+- New API:
++HB_SCRIPT_KAWI
++HB_SCRIPT_NAG_MUNDARI
+
+
+Overview of changes leading to 5.1.0
+Sunday, July 31, 2022
+====================================
+- More extensive buffer tracing messages. (Behdad Esfahbod)
+- Fix hb-ft regression in bitmap fonts rendering. (Behdad Esfahbod)
+- Support extension promotion of lookups in hb-subset-repacker. (Garret Rieger)
+- A new HB_GLYPH_FLAG_SAFE_TO_INSERT_TATWEEL for scripts that use elongation
+ (e.g. Arabic) to signify where it is safe to insert tatweel glyph without
+ interrupting shaping. (Behdad Esfahbod)
+- Add “--safe-to-insert-tatweel” to “hb-shape” tool. (Behdad Esfahbod)
+
+- New API
++HB_GLYPH_FLAG_SAFE_TO_INSERT_TATWEEL
++HB_BUFFER_FLAG_PRODUCE_SAFE_TO_INSERT_TATWEEL
+
+
+Overview of changes leading to 5.0.1
+Saturday, July 23, 2022
+====================================
+- Fix version 2 “avar” table with hb-ft. (Behdad Esfahbod)
+
+
+Overview of changes leading to 5.0.0
+Saturday, July 23, 2022
+====================================
+- Support fonts with more than 65535 glyphs in “GDEF”, “GSUB”, and “GPOS”
+ tables. This is part of https://github.com/be-fonts/boring-expansion-spec to
+ extend OpenType in a backward-compatible way.
+ (Behdad Esfahbod, Garret Rieger)
+- Complete support for more than 65535 glyphs in “glyf” table that started in
+ 4.0.0 release. Part of boring-expansion-spec. (Behdad Esfahbod)
+- Support version 2 of “avar” table. Part of boring-expansion-spec.
+ (Behdad Esfahbod)
+- Fix mark attachment on multiple substitutions in some cases.
+ (Behdad Esfahbod)
+- Fix application of “calt”, “rclt”, and “ccmp” features to better match
+ Uniscribe behaviour with some Arabic fonts. (Behdad Esfahbod)
+- Improvement to interaction between multiple cursive attachments.
+ (Behdad Esfahbod)
+- Improve multiple mark interactions in Hebrew. (Behdad Esfahbod)
+- Implement language-specific forms in AAT shaping. (Behdad Esfahbod)
+- Fix variation of “VORG” table. (Behdad Esfahbod)
+- Support for specific script tags to be retained in the subsetter, and add
+ “--layout-scripts” option to “hb-subset” tool. (Garret Rieger)
+- Accept space as delimiter for --features/--variations in command line tools.
+- Improve subsetting of “COLR” table. (Qunxin Liu)
+- Improved fuzzing coverage for ot-math API. (Frédéric Wang)
+- Fix “kern” table version 2 (AAT) sanitization on 32-bit systems.
+ (Behdad Esfahbod)
+- Allow negative glyph advances from “graphite2” shaper. (Stephan Bergmann)
+- Implement loading (color) bitmap fonts with hb-ft. (Behdad Esfahbod)
+- Fix regression in hb-ft when changing font size. (Behdad Esfahbod)
+- Fix build on GCC < 7. (Kleis Auke Wolthuizen)
+- Dynamically load dwrite.dll on windows if “directwrite” shaper is enabled.
+ (Luca Bacci)
+- Provide a single-file harfbuzz-subset.cc file for easier alternate building
+ of hb-subset library, similar to harfbuzz.cc. (Khaled Hosny)
+
+- New API
++HB_SUBSET_SETS_LAYOUT_SCRIPT_TAG
++hb_language_matches()
+
+
+Overview of changes leading to 4.4.1
+Wednesday, June 29, 2022
+====================================
+- Fix test failure with some compilers.
+- Fix Telugu and Kannada kerning regression.
+
+
+Overview of changes leading to 4.4.0
+Monday, June 27, 2022
+====================================
+- Caching of variable fonts shaping, in particular when using HarfBuzz’s own
+ font loading functions (ot). Bringing performance of variable shaping in par
+ with non-variable fonts shaping. (Behdad Esfahbod)
+- Caching of format 2 “Contextual Substitution” and “Chained Contexts
+ Substitution” lookups. Resulting in up to 20% speedup of lookup-heavy fonts
+ like Gulzar or Noto Nastaliq Urdu. (Behdad Esfahbod)
+- Improved ANSI output from hb-view. (Behdad Esfahbod)
+- Support for shaping legacy, pre-OpenType Windows 3.1-era, Arabic fonts that
+ relied on a fixed PUA encoding. (Khaled Hosny, Behdad Esfahbod)
+- Sinhala script is now shaped by the USE shaper instead of “indic” one.
+ (Behdad Esfahbod, David Corbett)
+- Thai shaper improvements. (David Corbett)
+- hb-ot-name API supports approximate BCP-47 language matching, for example
+ asking for “en_US” in a font that has only “en” names will return them.
+ (Behdad Esfahbod)
+- Optimized TrueType glyph shape loading. (Behdad Esfahbod)
+- Fix subsetting of HarfBuzz faces created via hb_face_create_for_tables().
+ (Garret Rieger)
+- Add 32 bit var store support to the subsetter. (Garret Rieger)
+
+- New API
++HB_BUFFER_FLAG_DEFINED
++HB_BUFFER_SERIALIZE_FLAG_DEFINED
++hb_font_changed()
++hb_font_get_serial()
++hb_ft_hb_font_changed()
++hb_set_hash()
++hb_map_copy()
++hb_map_hash()
+
+
+Overview of changes leading to 4.3.0
+Friday, May 20, 2022
+====================================
+- Major speed up in loading and subsetting fonts, especially in
+ handling CFF table. Subsetting some fonts is now 3 times faster.
+ (Behdad Esfahbod, Garret Rieger)
+- Speed up blending CFF2 table. (Behdad Esfahbod)
+- Speed up hb_ot_tags_from_language(). (Behdad Esfahbod, David Corbett)
+- Fix USE classification of U+10A38 to fix multiple marks on single Kharoshthi
+ base. (David Corbett)
+- Fix parsing of empty CFF Index. (Behdad Esfahbod)
+- Fix subsetting CPAL table with partial palette overlaps. (Garret Rieger)
+
+- New API
++hb_map_is_equal() (Behdad Esfahbod)
+
+
+Overview of changes leading to 4.2.1
+Sunday, April 24, 2022
+====================================
+- Make sure hb_blob_create_from_file_or_fail() always returns nullptr in case
+ of failure and not empty blob sometimes. (Khaled Hosny)
+- Add --passthrough-tables option to hb-subset. (Cosimo Lupo)
+- Reinstate a pause after basic features in Khmer shaper, fixing a regression
+ introduced in previous release. (Behdad Esfahbod)
+- Better handling of Regional_Indicator when shaped with RTL-native scripts,
+ reverting earlier fix that caused regressions in AAT shaping. (Behdad Esfahbod)
+
+
+Overview of changes leading to 4.2.0
+Wednesday, March 30, 2022
+====================================
+- Source code reorganization, splitting large hb-ot-layout files into smaller,
+ per-subtable ones under OT/Layout/*. Code for more tables will follow suit in
+ later releases. (Garret Rieger, Behdad Esfahbod)
+- Revert Indic shaper change in previous release that broke some fonts and
+ instead make per-syllable restriction of “GSUB” application limited to
+ script-specific Indic features, while applying them and discretionary
+ features in one go. (Behdad Esfahbod)
+- Fix decoding of private in gvar table. (Behdad Esfahbod)
+- Fix handling of contextual lookups that delete too many glyphs. (Behdad Esfahbod)
+- Make “morx” deleted glyphs don’t block “GPOS” application. (Behdad Esfahbod)
+- Various build fixes. (Chun-wei Fan, Khaled Hosny)
+
+- New API
++hb_set_next_many() (Andrew John)
+
+
+Overview of changes leading to 4.1.0
+Wednesday, March 23, 2022
+====================================
+- Various OSS-Fuzz fixes. (Behdad Esfahbod)
+- Make fallback vertical-origin match FreeType’s. (Behdad Esfahbod)
+- Treat visible viramas like dependent vowels in USE shaper. (David Corbett)
+- Apply presentation forms features and discretionary features in one go in
+ Indic shaper, which seems to match Uniscribe and CoreText behaviour.
+ (Behdad Esfahbod, David Corbett)
+- Various bug fixes.
+
+- New API
++hb_set_add_sorted_array() (Andrew John)
+
+
+Overview of changes leading to 4.0.1
+Friday, March 11, 2022
+====================================
+- Update OpenType to AAT mappings for “hist” and “vrtr” features.
+ (Florian Pircher)
+- Update IANA Language Subtag Registry to 2022-03-02. (David Corbett)
+- Update USE shaper to allow any non-numeric tail in a symbol cluster, and
+ remove obsolete data overrides. (David Corbett)
+- Fix handling of baseline variations to return correctly scaled values.
+ (Matthias Clasen)
+- A new experimental hb_subset_repack_or_fail() to repack an array of objects,
+ eliminating offset overflows. The API is not available unless HarfBuzz is
+ built with experimental APIs enabled. (Qunxin Liu)
+
+- New experimental API
++hb_link_t
++hb_object_t
++hb_subset_repack_or_fail()
+
+
+Overview of changes leading to 4.0.0
+Tuesday, March 1, 2022
+====================================
+- New public API to create subset plan and gather information on things like
+ glyph mappings in the final subset. The plan can then be passed on to perform
+ the subsetting operation. (Garret Rieger)
+- Draw API for extracting glyph shapes have been extended and finalized and is
+ no longer an experimental API. The draw API supports glyf, CFF and CFF2
+ glyph outlines tables, and applies variation settings set on the font as well
+ as synthetic slant. The new public API is not backward compatible with the
+ previous, non-public, experimental API. (Behdad Esfahbod)
+- The hb-view tool will use HarfBuzz draw API to render the glyphs instead of
+ cairo-ft when compiled with Cairo 1.17.5 or newer, setting HB_DRAW
+ environment variable to 1 or 0 will force using or not use the draw API,
+ respectively. (Behdad Esfahbod)
+- The hb-shape and hb-view tools now default to using HarfBuzz’s own font
+ loading functions (ot) instead of FreeType ones (ft). They also have a new
+ option, --font-slant, to apply synthetic slant to the font. (Behdad Esfahbod)
+- HarfBuzz now supports more than 65535 (the OpenType limit) glyph shapes and
+ metrics. See https://github.com/be-fonts/boring-expansion-spec/issues/6 and
+ https://github.com/be-fonts/boring-expansion-spec/issues/7 for details.
+ (Behdad Esfahbod)
+- New API to get the dominant horizontal baseline tag for a given script.
+ (Behdad Esfahbod)
+- New API to get the baseline positions from the font, and synthesize missing
+ ones. As well as new API to get font metrics and synthesize missing ones.
+ (Matthias Clasen)
+- Improvements to finding dependencies on Windows when building with Visual
+ Studio. (Chun-wei Fan)
+- New buffer flag, HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT, that must be set
+ during shaping for HB_GLYPH_FLAG_UNSAFE_TO_CONCAT flag to be reliably
+ produced. This is to limit the performance hit of producing this flag to when
+ it is actually needed. (Behdad Esfahbod)
+- Documentation improvements. (Matthias Clasen)
+
+- New API
+ - General:
+ +HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT
+ +hb_var_num_t
+
+ - Draw:
+ +hb_draw_funcs_t
+ +hb_draw_funcs_create()
+ +hb_draw_funcs_reference()
+ +hb_draw_funcs_destroy()
+ +hb_draw_funcs_is_immutable()
+ +hb_draw_funcs_make_immutable()
+ +hb_draw_move_to_func_t
+ +hb_draw_funcs_set_move_to_func()
+ +hb_draw_line_to_func_t
+ +hb_draw_funcs_set_line_to_func()
+ +hb_draw_quadratic_to_func_t
+ +hb_draw_funcs_set_quadratic_to_func()
+ +hb_draw_cubic_to_func_t
+ +hb_draw_funcs_set_cubic_to_func()
+ +hb_draw_close_path_func_t
+ +hb_draw_funcs_set_close_path_func()
+ +hb_draw_state_t
+ +HB_DRAW_STATE_DEFAULT
+ +hb_draw_move_to()
+ +hb_draw_line_to()
+ +hb_draw_quadratic_to()
+ +hb_draw_cubic_to()
+ +hb_draw_close_path()
+ +hb_font_get_glyph_shape_func_t
+ +hb_font_funcs_set_glyph_shape_func()
+ +hb_font_get_glyph_shape()
+
+ - OpenType layout
+ +HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL
+ +HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL
+ +hb_ot_layout_get_horizontal_baseline_tag_for_script()
+ +hb_ot_layout_get_baseline_with_fallback()
+
+ - Metrics:
+ +hb_ot_metrics_get_position_with_fallback()
+
+ - Subset:
+ +hb_subset_plan_t
+ +hb_subset_plan_create_or_fail()
+ +hb_subset_plan_reference()
+ +hb_subset_plan_destroy()
+ +hb_subset_plan_set_user_data()
+ +hb_subset_plan_get_user_data()
+ +hb_subset_plan_execute_or_fail()
+ +hb_subset_plan_unicode_to_old_glyph_mapping()
+ +hb_subset_plan_new_to_old_glyph_mapping()
+ +hb_subset_plan_old_to_new_glyph_mapping()
+
+
+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 typedef’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
====================================
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...
+ 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.
- CoreText: Drastically speed up font initialization.
- CoreText: Fix tiny leak.
- Group ZWJ/ZWNJ with previous syllable under cluster-level=0.
- https://github.com/behdad/harfbuzz/issues/217
+ https://github.com/harfbuzz/harfbuzz/issues/217
- Add test/shaping/README.md about how to add tests to the suite.
- 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/behdad/harfbuzz/issues/211
- https://github.com/behdad/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2
+ 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.
====================================
- Fix badly-broken fallback shaper that affected terminology.
- https://github.com/behdad/harfbuzz/issues/187
+ 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)
====================================
- Implement 'stch' stretch feature for Syriac Abbreviation Mark.
- https://github.com/behdad/harfbuzz/issues/141
+ 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/behdad/harfbuzz/issues/153
+ 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:
- 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/behdad/harfbuzz/issues/143
+ https://github.com/harfbuzz/harfbuzz/issues/143
Overview of changes leading to 1.0.5
====================================
- Fix multiple memory access bugs discovered using libFuzzer.
- https://github.com/behdad/harfbuzz/issues/139
+ 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.
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()
- 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.
projects / platform / upstream / harfbuzz.git / blobdiff