+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
====================================
‘math’ tag. (Alexis King)
- It is now possible to get at once all math kerning values for a given glyph
at a given corner. (Alexis King)
-- Fix locale_t portability issues on systems the typdef’s it to a void pointer.
- (Behdad Esfahbod)
+- 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
++hb_ot_math_get_glyph_kernings()
- Deprecated API
+HB_OT_MATH_SCRIPT
projects / platform / upstream / harfbuzz.git / blobdiff