1Overview of changes leading to 6.0.0 2Friday, December 16, 2022 3==================================== 4- A new API have been added to pre-process the face and speed up future 5 subsetting operations on that face. Provides up to a 95% reduction in 6 subsetting times when the same face is subset more than once. 7 8 For more details and benchmarks, see: 9 https://github.com/harfbuzz/harfbuzz/blob/main/docs/subset-preprocessing.md 10 11 (Garret Rieger, Behdad Esfahbod) 12 13- Shaping have been speedup by skipping entire lookups when the buffer contents 14 don't intersect with the lookup. Shows up to a 10% speedup in shaping some 15 fonts. (Behdad Esfahbod) 16 17- A new experimental feature, “Variable Composites” (enabled by passing 18 -Dexperimental_api=true to meson), is also featured in this release. 19 This technology enables drastic compression of fonts in the Chinese, 20 Japanese, Korean, and other writing systems, by reusing the OpenType Font 21 Variations technology for encoding “smart components” into the font. 22 23 The specification for these extensions to the font format can be found in: 24 https://github.com/harfbuzz/boring-expansion-spec/blob/glyf1/glyf1.md 25 26 A test variable-font with ~7160 Hangul syllables derived from the 27 NotoSerifKR-VF font has been built, with existing OpenType technology, as 28 well as with the new Variable Composites (VarComposites) technology. The 29 VarComposites font is over 90% smaller than the OpenType version of the font! 30 Both fonts can be obtained from the “smarties” repository: 31 https://github.com/behdad/smarties/tree/3.0/fonts/hangul/serif 32 33 When building HarfBuzz with experimental features enabled, you can test 34 the “smarties” font with a sample character like this: 35 36 $ hb-view butchered-hangul-serif-smarties-variable.ttf -u AE01 --variations=wght=700 37 38 (Behdad Esfahbod) 39 40- The HarfBuzz subsetter can now drop axes by pinning them to specific values 41 (also referred to as instancing). There are a couple of restrictions 42 currently: 43 44 - Only works with TrueType (“glyf”) based fonts. “CFF2” fonts are not yet 45 supported. 46 - Only supports the case where all axes in a font are pinned. 47 48 (Garret Rieger, Qunxin Liu) 49 50- Miscellaneous fixes and improvements. 51 52 (Behdad Esfahbod, Christoph Reiter, David Corbett, Eli Schwartz, Garret 53 Rieger, Joel Auterson, Jordan Petridis, Khaled Hosny, Lorenz Wildberg, 54 Marco Rebhan, Martin Storsjö, Matthias Clasen, Qunxin Liu, Satadru Pramanik) 55 56 57- New API 58+hb_subset_input_pin_axis_location() 59+hb_subset_input_pin_axis_to_default() 60+hb_subset_preprocess() 61 62 63Overview of changes leading to 5.3.1 64Wednesday, October 19, 2022 65==================================== 66- Subsetter repacker fixes. (Garret Rieger) 67- Adjust Grapheme clusters for Katakana voiced sound marks. (Behdad Esfahbod) 68- New “hb-subset” option “--preprocess-face”. (Garret Rieger) 69 70 71Overview of changes leading to 5.3.0 72Saturday, October 8, 2022 73"Women, Life, Freedom" #MahsaAmini 74==================================== 75- Don’t add glyphs from dropped MATH or COLR tables to the subset glyphs. 76 (Khaled Hosny) 77- Map “rlig” to appropriate AAT feature selectors. (Jonathan Kew) 78- Update USE data files to latest version. (David Corbett) 79- Check “CBDT” extents first before outline tables, to help with fonts that 80 also include an empty “glyf” table. (Khaled Hosny) 81- More work towards variable font instancing in the subsetter. (Qunxin Liu) 82- Subsetter repacker improvements. (Garret Rieger) 83- New API: 84+hb_ot_layout_lookup_get_optical_bound() 85+hb_face_builder_sort_tables() 86 87 88Overview of changes leading to 5.2.0 89Saturday, September 17, 2022 90==================================== 91- Fix regressions in hb-ft font functions for FT_Face’s with transformation 92 matrix. (Behdad Esfahbod) 93- The experimental hb-repacker API now supports splitting several GPOS subtable 94 types when needed. (Garret Rieger) 95- The HarfBuzz extensions to OpenType font format are now opt-in behind 96 build-time flags. (Behdad Esfahbod) 97- The experimental hb-subset variable fonts instantiation API can now 98 instantiate more font tables and arbitrary axis locations. (Qunxin Liu) 99- Unicode 15 support. (David Corbett) 100- Various documentation improvements. (Behdad Esfahbod, Matthias Clasen) 101- The hb-view command line tool now detects WezTerm inline images support. 102 (Wez Furlong) 103- Fix FreeType and ICU dependency lookup with meson. (Xavier Claessens) 104 105- New API: 106+HB_SCRIPT_KAWI 107+HB_SCRIPT_NAG_MUNDARI 108 109 110Overview of changes leading to 5.1.0 111Sunday, July 31, 2022 112==================================== 113- More extensive buffer tracing messages. (Behdad Esfahbod) 114- Fix hb-ft regression in bitmap fonts rendering. (Behdad Esfahbod) 115- Support extension promotion of lookups in hb-subset-repacker. (Garret Rieger) 116- A new HB_GLYPH_FLAG_SAFE_TO_INSERT_TATWEEL for scripts that use elongation 117 (e.g. Arabic) to signify where it is safe to insert tatweel glyph without 118 interrupting shaping. (Behdad Esfahbod) 119- Add “--safe-to-insert-tatweel” to “hb-shape” tool. (Behdad Esfahbod) 120 121- New API 122+HB_GLYPH_FLAG_SAFE_TO_INSERT_TATWEEL 123+HB_BUFFER_FLAG_PRODUCE_SAFE_TO_INSERT_TATWEEL 124 125 126Overview of changes leading to 5.0.1 127Saturday, July 23, 2022 128==================================== 129- Fix version 2 “avar” table with hb-ft. (Behdad Esfahbod) 130 131 132Overview of changes leading to 5.0.0 133Saturday, July 23, 2022 134==================================== 135- Support fonts with more than 65535 glyphs in “GDEF”, “GSUB”, and “GPOS” 136 tables. This is part of https://github.com/be-fonts/boring-expansion-spec to 137 extend OpenType in a backward-compatible way. 138 (Behdad Esfahbod, Garret Rieger) 139- Complete support for more than 65535 glyphs in “glyf” table that started in 140 4.0.0 release. Part of boring-expansion-spec. (Behdad Esfahbod) 141- Support version 2 of “avar” table. Part of boring-expansion-spec. 142 (Behdad Esfahbod) 143- Fix mark attachment on multiple substitutions in some cases. 144 (Behdad Esfahbod) 145- Fix application of “calt”, “rclt”, and “ccmp” features to better match 146 Uniscribe behaviour with some Arabic fonts. (Behdad Esfahbod) 147- Improvement to interaction between multiple cursive attachments. 148 (Behdad Esfahbod) 149- Improve multiple mark interactions in Hebrew. (Behdad Esfahbod) 150- Implement language-specific forms in AAT shaping. (Behdad Esfahbod) 151- Fix variation of “VORG” table. (Behdad Esfahbod) 152- Support for specific script tags to be retained in the subsetter, and add 153 “--layout-scripts” option to “hb-subset” tool. (Garret Rieger) 154- Accept space as delimiter for --features/--variations in command line tools. 155- Improve subsetting of “COLR” table. (Qunxin Liu) 156- Improved fuzzing coverage for ot-math API. (Frédéric Wang) 157- Fix “kern” table version 2 (AAT) sanitization on 32-bit systems. 158 (Behdad Esfahbod) 159- Allow negative glyph advances from “graphite2” shaper. (Stephan Bergmann) 160- Implement loading (color) bitmap fonts with hb-ft. (Behdad Esfahbod) 161- Fix regression in hb-ft when changing font size. (Behdad Esfahbod) 162- Fix build on GCC < 7. (Kleis Auke Wolthuizen) 163- Dynamically load dwrite.dll on windows if “directwrite” shaper is enabled. 164 (Luca Bacci) 165- Provide a single-file harfbuzz-subset.cc file for easier alternate building 166 of hb-subset library, similar to harfbuzz.cc. (Khaled Hosny) 167 168- New API 169+HB_SUBSET_SETS_LAYOUT_SCRIPT_TAG 170+hb_language_matches() 171 172 173Overview of changes leading to 4.4.1 174Wednesday, June 29, 2022 175==================================== 176- Fix test failure with some compilers. 177- Fix Telugu and Kannada kerning regression. 178 179 180Overview of changes leading to 4.4.0 181Monday, June 27, 2022 182==================================== 183- Caching of variable fonts shaping, in particular when using HarfBuzz’s own 184 font loading functions (ot). Bringing performance of variable shaping in par 185 with non-variable fonts shaping. (Behdad Esfahbod) 186- Caching of format 2 “Contextual Substitution” and “Chained Contexts 187 Substitution” lookups. Resulting in up to 20% speedup of lookup-heavy fonts 188 like Gulzar or Noto Nastaliq Urdu. (Behdad Esfahbod) 189- Improved ANSI output from hb-view. (Behdad Esfahbod) 190- Support for shaping legacy, pre-OpenType Windows 3.1-era, Arabic fonts that 191 relied on a fixed PUA encoding. (Khaled Hosny, Behdad Esfahbod) 192- Sinhala script is now shaped by the USE shaper instead of “indic” one. 193 (Behdad Esfahbod, David Corbett) 194- Thai shaper improvements. (David Corbett) 195- hb-ot-name API supports approximate BCP-47 language matching, for example 196 asking for “en_US” in a font that has only “en” names will return them. 197 (Behdad Esfahbod) 198- Optimized TrueType glyph shape loading. (Behdad Esfahbod) 199- Fix subsetting of HarfBuzz faces created via hb_face_create_for_tables(). 200 (Garret Rieger) 201- Add 32 bit var store support to the subsetter. (Garret Rieger) 202 203- New API 204+HB_BUFFER_FLAG_DEFINED 205+HB_BUFFER_SERIALIZE_FLAG_DEFINED 206+hb_font_changed() 207+hb_font_get_serial() 208+hb_ft_hb_font_changed() 209+hb_set_hash() 210+hb_map_copy() 211+hb_map_hash() 212 213 214Overview of changes leading to 4.3.0 215Friday, May 20, 2022 216==================================== 217- Major speed up in loading and subsetting fonts, especially in 218 handling CFF table. Subsetting some fonts is now 3 times faster. 219 (Behdad Esfahbod, Garret Rieger) 220- Speed up blending CFF2 table. (Behdad Esfahbod) 221- Speed up hb_ot_tags_from_language(). (Behdad Esfahbod, David Corbett) 222- Fix USE classification of U+10A38 to fix multiple marks on single Kharoshthi 223 base. (David Corbett) 224- Fix parsing of empty CFF Index. (Behdad Esfahbod) 225- Fix subsetting CPAL table with partial palette overlaps. (Garret Rieger) 226 227- New API 228+hb_map_is_equal() (Behdad Esfahbod) 229 230 231Overview of changes leading to 4.2.1 232Sunday, April 24, 2022 233==================================== 234- Make sure hb_blob_create_from_file_or_fail() always returns nullptr in case 235 of failure and not empty blob sometimes. (Khaled Hosny) 236- Add --passthrough-tables option to hb-subset. (Cosimo Lupo) 237- Reinstate a pause after basic features in Khmer shaper, fixing a regression 238 introduced in previous release. (Behdad Esfahbod) 239- Better handling of Regional_Indicator when shaped with RTL-native scripts, 240 reverting earlier fix that caused regressions in AAT shaping. (Behdad Esfahbod) 241 242 243Overview of changes leading to 4.2.0 244Wednesday, March 30, 2022 245==================================== 246- Source code reorganization, splitting large hb-ot-layout files into smaller, 247 per-subtable ones under OT/Layout/*. Code for more tables will follow suit in 248 later releases. (Garret Rieger, Behdad Esfahbod) 249- Revert Indic shaper change in previous release that broke some fonts and 250 instead make per-syllable restriction of “GSUB” application limited to 251 script-specific Indic features, while applying them and discretionary 252 features in one go. (Behdad Esfahbod) 253- Fix decoding of private in gvar table. (Behdad Esfahbod) 254- Fix handling of contextual lookups that delete too many glyphs. (Behdad Esfahbod) 255- Make “morx” deleted glyphs don’t block “GPOS” application. (Behdad Esfahbod) 256- Various build fixes. (Chun-wei Fan, Khaled Hosny) 257 258- New API 259+hb_set_next_many() (Andrew John) 260 261 262Overview of changes leading to 4.1.0 263Wednesday, March 23, 2022 264==================================== 265- Various OSS-Fuzz fixes. (Behdad Esfahbod) 266- Make fallback vertical-origin match FreeType’s. (Behdad Esfahbod) 267- Treat visible viramas like dependent vowels in USE shaper. (David Corbett) 268- Apply presentation forms features and discretionary features in one go in 269 Indic shaper, which seems to match Uniscribe and CoreText behaviour. 270 (Behdad Esfahbod, David Corbett) 271- Various bug fixes. 272 273- New API 274+hb_set_add_sorted_array() (Andrew John) 275 276 277Overview of changes leading to 4.0.1 278Friday, March 11, 2022 279==================================== 280- Update OpenType to AAT mappings for “hist” and “vrtr” features. 281 (Florian Pircher) 282- Update IANA Language Subtag Registry to 2022-03-02. (David Corbett) 283- Update USE shaper to allow any non-numeric tail in a symbol cluster, and 284 remove obsolete data overrides. (David Corbett) 285- Fix handling of baseline variations to return correctly scaled values. 286 (Matthias Clasen) 287- A new experimental hb_subset_repack_or_fail() to repack an array of objects, 288 eliminating offset overflows. The API is not available unless HarfBuzz is 289 built with experimental APIs enabled. (Qunxin Liu) 290 291- New experimental API 292+hb_link_t 293+hb_object_t 294+hb_subset_repack_or_fail() 295 296 297Overview of changes leading to 4.0.0 298Tuesday, March 1, 2022 299==================================== 300- New public API to create subset plan and gather information on things like 301 glyph mappings in the final subset. The plan can then be passed on to perform 302 the subsetting operation. (Garret Rieger) 303- Draw API for extracting glyph shapes have been extended and finalized and is 304 no longer an experimental API. The draw API supports glyf, CFF and CFF2 305 glyph outlines tables, and applies variation settings set on the font as well 306 as synthetic slant. The new public API is not backward compatible with the 307 previous, non-public, experimental API. (Behdad Esfahbod) 308- The hb-view tool will use HarfBuzz draw API to render the glyphs instead of 309 cairo-ft when compiled with Cairo 1.17.5 or newer, setting HB_DRAW 310 environment variable to 1 or 0 will force using or not use the draw API, 311 respectively. (Behdad Esfahbod) 312- The hb-shape and hb-view tools now default to using HarfBuzz’s own font 313 loading functions (ot) instead of FreeType ones (ft). They also have a new 314 option, --font-slant, to apply synthetic slant to the font. (Behdad Esfahbod) 315- HarfBuzz now supports more than 65535 (the OpenType limit) glyph shapes and 316 metrics. See https://github.com/be-fonts/boring-expansion-spec/issues/6 and 317 https://github.com/be-fonts/boring-expansion-spec/issues/7 for details. 318 (Behdad Esfahbod) 319- New API to get the dominant horizontal baseline tag for a given script. 320 (Behdad Esfahbod) 321- New API to get the baseline positions from the font, and synthesize missing 322 ones. As well as new API to get font metrics and synthesize missing ones. 323 (Matthias Clasen) 324- Improvements to finding dependencies on Windows when building with Visual 325 Studio. (Chun-wei Fan) 326- New buffer flag, HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT, that must be set 327 during shaping for HB_GLYPH_FLAG_UNSAFE_TO_CONCAT flag to be reliably 328 produced. This is to limit the performance hit of producing this flag to when 329 it is actually needed. (Behdad Esfahbod) 330- Documentation improvements. (Matthias Clasen) 331 332- New API 333 - General: 334 +HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT 335 +hb_var_num_t 336 337 - Draw: 338 +hb_draw_funcs_t 339 +hb_draw_funcs_create() 340 +hb_draw_funcs_reference() 341 +hb_draw_funcs_destroy() 342 +hb_draw_funcs_is_immutable() 343 +hb_draw_funcs_make_immutable() 344 +hb_draw_move_to_func_t 345 +hb_draw_funcs_set_move_to_func() 346 +hb_draw_line_to_func_t 347 +hb_draw_funcs_set_line_to_func() 348 +hb_draw_quadratic_to_func_t 349 +hb_draw_funcs_set_quadratic_to_func() 350 +hb_draw_cubic_to_func_t 351 +hb_draw_funcs_set_cubic_to_func() 352 +hb_draw_close_path_func_t 353 +hb_draw_funcs_set_close_path_func() 354 +hb_draw_state_t 355 +HB_DRAW_STATE_DEFAULT 356 +hb_draw_move_to() 357 +hb_draw_line_to() 358 +hb_draw_quadratic_to() 359 +hb_draw_cubic_to() 360 +hb_draw_close_path() 361 +hb_font_get_glyph_shape_func_t 362 +hb_font_funcs_set_glyph_shape_func() 363 +hb_font_get_glyph_shape() 364 365 - OpenType layout 366 +HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL 367 +HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL 368 +hb_ot_layout_get_horizontal_baseline_tag_for_script() 369 +hb_ot_layout_get_baseline_with_fallback() 370 371 - Metrics: 372 +hb_ot_metrics_get_position_with_fallback() 373 374 - Subset: 375 +hb_subset_plan_t 376 +hb_subset_plan_create_or_fail() 377 +hb_subset_plan_reference() 378 +hb_subset_plan_destroy() 379 +hb_subset_plan_set_user_data() 380 +hb_subset_plan_get_user_data() 381 +hb_subset_plan_execute_or_fail() 382 +hb_subset_plan_unicode_to_old_glyph_mapping() 383 +hb_subset_plan_new_to_old_glyph_mapping() 384 +hb_subset_plan_old_to_new_glyph_mapping() 385 386 387Overview of changes leading to 3.4.0 388Sunday, February 13, 2022 389==================================== 390- Perform sanity checks on shaping results is now part of “harfbuzz” library 391 and can be enabled by setting the buffer flag HB_BUFFER_FLAG_VERIFY. 392 (Behdad Esfahbod) 393- Arabic Mark Transient Reordering Algorithm have been updated to revision 6. 394 (Khaled Hosny) 395- ISO 15924 code for mathematical notation, ‘Zmth’, now maps to the OpenType 396 ‘math’ tag. (Alexis King) 397- It is now possible to get at once all math kerning values for a given glyph 398 at a given corner. (Alexis King) 399- Fix locale_t portability issues on systems the typedef’s it to a void 400 pointer. (Behdad Esfahbod) 401 402- New API: 403+HB_BUFFER_FLAG_VERIFY 404+HB_OT_TAG_MATH_SCRIPT 405+HB_SCRIPT_MATH 406+hb_ot_math_kern_entry_t 407+hb_ot_math_get_glyph_kernings() 408 409- Deprecated API 410+HB_OT_MATH_SCRIPT 411 412 413Overview of changes leading to 3.3.2 414Sunday, February 6, 2022 415==================================== 416- Revert splitting of pair positioning values introduced in 3.3.0 as it proved 417 problematic. (Behdad Esfahbod) 418 419 420Overview of changes leading to 3.3.1 421Monday, January 31, 2022 422==================================== 423- Fix heap-use-after-free in harfbuzz-subset introduced in previous release. 424 (Garret Rieger) 425 426 427Overview of changes leading to 3.3.0 428Monday, January 31, 2022 429==================================== 430- Improved documentation. (Matthias Clasen) 431- Internal code cleanup, using C++ standard library more. (Behdad Esfahbod) 432- The low 16-bits of face index will be used by hb_face_create() to select a 433 face inside a font collection file format, while the high 16-bits will be 434 used by hb_font_create() to load the named instance. (Behdad Esfahbod) 435- Glyph positions and other font metrics now apply synthetic slant set by 436 hb_font_set_synthetic_slant(), for improved positioning for synthetically 437 slanted fonts. (Behdad Esfahbod) 438- Fixed unintentional locale dependency in hb_variation_to_string() for decimal 439 point representation. (Matthias Clasen) 440- When applying pair positioning (kerning) the positioning value is split 441 between the two sides of the pair for improved cursor positioning between 442 such pairs. (Behdad Esfahbod) 443- Introduced new HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, to be used in conjunction 444 with HB_GLYPH_FLAG_UNSAFE_TO_BREAK for optimizing re-shaping during line 445 breaking. Check the documentation for further details. (Behdad Esfahbod) 446- Improved handling of macrolanguages when mapping BCP 47 codes to OpenType 447 tags. (David Corbett) 448 449- New API: 450+HB_GLYPH_FLAG_UNSAFE_TO_CONCAT 451+hb_segment_properties_overlay() 452+hb_buffer_create_similar() 453+hb_font_set_synthetic_slant() 454+hb_font_get_synthetic_slant() 455+hb_font_get_var_coords_design() 456 457 458Overview of changes leading to 3.2.0 459Friday, November 26, 2021 460==================================== 461“harfbuzz” library improvements: 462- Fixed shaping of Apple Color Emoji flags in right-to-left context. (Behdad Esfahbod) 463- Fixed positioning of CFF fonts in HB_TINY profile. (Behdad Esfahbod) 464- OpenType 1.9 language tags update. (David Corbett) 465- Add HB_NO_VERTICAL config option. 466- Add HB_CONFIG_OVERRIDE_H for easier configuration. (Behdad Esfahbod) 467 468“harfbuzz-subset” library improvements: 469- Improved packing of cmap, loca, and Ligature tables. (Garret Rieger) 470- Significantly improved overflow-resolution strategy in the repacker. (Garret Rieger) 471 472 473Overview of changes leading to 3.1.2 474Friday, November 26, 2021 475==================================== 476- hb-shape / hb-view: revert treating text on the commandline as single 477 paragraph (was introduced in 3.0.0); add new --single-par to do that. 478 (Behdad Esfahbod) 479- Subsetter bug fixes. (Garret Rieger, Qunxin Liu, Behdad Esfahbod) 480 481 482Overview of changes leading to 3.1.1 483Wednesday, November 8, 2021 484==================================== 485- Work around GCC cast-align error/warning on some platforms. (Behdad Esfahbod) 486- Documentation improvements. (Matthias Clasen) 487 488 489Overview of changes leading to 3.1.0 490Wednesday, November 3, 2021 491==================================== 492- Better offset-overflow handling in the subsetter library. (Garret Rieger) 493- Improved Unicode 14 properties in the USE shaper, and various other USE 494 shaper fixes. (David Corbett) 495- MATH and COLR v1 tables subsetting support, and various other subsetter fixes. 496 (Qunxin Liu) 497- Support for Pwo Karen / Ason Chin medial la. (Simon Cozens) 498- Apply GPOS positioning when substituting with morx table, if kerx is missing. 499 (Behdad Esfahbod) 500- Apply calt and clig features across syllable boundaries in Indic shaper. 501 (Behdad Esfahbod) 502- meson option for enabling Graphite 2 has been renamed to graphite2. 503- Build and documentation fixes. 504 505- New API: 506+hb_buffer_set_not_found_glyph() 507+hb_buffer_get_not_found_glyph() 508 509 510Overview of changes leading to 3.0.0 511Friday, September 17, 2021 512==================================== 513- Unicode 14.0 support (David Corbett). 514- The hb-subset API and the harfbuzz-subset library's ABI are now declared 515 stable. The harfbuzz-subset library would not have been possible without the 516 work of Garret Rieger and Qunxin Liu from Google Fonts, and the earlier work 517 of Michiharu Ariza from Adobe. 518- The hb-style API is now stable and no longer experimental. 519 520- New API: 521+hb_style_tag_t 522+hb_style_get_value() 523+hb_subset_input_t 524+hb_subset_flags_t 525+hb_subset_sets_t 526+hb_subset_input_create_or_fail() 527+hb_subset_input_reference() 528+hb_subset_input_destroy() 529+hb_subset_input_set_user_data() 530+hb_subset_input_get_user_data() 531+hb_subset_input_unicode_set() 532+hb_subset_input_glyph_set() 533+hb_subset_input_set() 534+hb_subset_input_get_flags() 535+hb_subset_input_set_flags() 536+hb_subset_or_fail() 537 538- Removed old unstable harfbuzz-subset API: 539-hb_subset_input_nameid_set() 540-hb_subset_input_namelangid_set() 541-hb_subset_input_layout_features_set() 542-hb_subset_input_no_subset_tables_set() 543-hb_subset_input_drop_tables_set() 544-hb_subset_input_set_drop_hints() 545-hb_subset_input_get_drop_hints() 546-hb_subset_input_set_desubroutinize() 547-hb_subset_input_get_desubroutinize() 548-hb_subset_input_set_retain_gids() 549-hb_subset_input_get_retain_gids() 550-hb_subset_input_set_name_legacy() 551-hb_subset_input_get_name_legacy() 552-hb_subset_input_set_overlaps_flag() 553-hb_subset_input_get_overlaps_flag() 554-hb_subset_input_set_notdef_outline() 555-hb_subset_input_get_notdef_outline() 556-hb_subset_input_set_no_prune_unicode_ranges() 557-hb_subset_input_get_no_prune_unicode_ranges() 558-hb_subset() 559 560 561Overview of changes leading to 2.9.1 562Tuesday, September 7, 2021 563==================================== 564- Final subset API is in place and if no issues are discovered, it will be the 565 stable subset API of HarfBuzz 3.0.0. Old API is kept to ease transition, but 566 will be removed in 3.0.0. 567- Various fuzzer-found bug fixes. 568- hb_buffer_append() now handles the pre- and post-context which previously 569 were left unchanged in the destination buffer. 570- hb-view / hb-shape now accept following new arguments: 571 o --unicodes-before/after: takes a list of hex numbers that represent Unicode 572 codepoints. 573- Undeprecated API: 574 hb_set_invert() 575 576 577Overview of changes leading to 2.9.0 578Wednesday, August 18, 2021 579History Repeats Itself (Afghanistan) 580==================================== 581- Subsetter API is being stabilized, with the first stable API to happen in 582 3.0.0 release (https://github.com/harfbuzz/harfbuzz/issues/3078). 583- Support multiple variation axes with same tag, aka HOI. 584- The “coretext” testing shaper now passes font variations to CoreText. 585- hb-shape/hb-view does not break line at new lines unless text is read from 586 file. 587- hb-view and hb-subset has a --batch now, similar to hb-shape. 588- The --batch mode now uses ; as argument separator instead of : used previously. 589- The --batch in hb-shape does not expect 0th argument anymore. That is, the 590 lines read are interpreted as argv[1:], instead of argv[0:]. 591- The --batch option has been undocumented. We are ready to document it; send 592 feedback if you find it useful. 593- hb-subset got arguments revamps. Added much-requested --gids-file, --glyphs, 594 --glyphs-file, --unicodes-file, supporting ranges in --unicodes. 595- Various bug fixes. 596 597 598Overview of changes leading to 2.8.2 599Tuesday, July 8, 2021 600==================================== 601- Shaping LTR digits for RTL scripts now makes the native direction of the 602 digits LTR, applying shaping and positioning rules on the same glyph order as 603 Uniscribe. (Jonathan Kew, Khaled Hosny). 604- Subsetting COLR v1 and CPAL tables is now supported. (Garret Rieger, Qunxin Liu) 605- Various fixes and improvements to the subsetter. (Garret Rieger, Qunxin Liu, Behdad) 606- When applying morx table, mark glyph widths should not be zeroed. (Jonathan Kew) 607- GPOS is preferred over kerx, if GSUB was applied. (Behdad) 608- Regional_Indicator pairs are grouped together when clustering. (Behdad) 609- New API: 610+hb_blob_create_or_fail() 611+hb_blob_create_from_file_or_fail() 612+hb_set_copy() 613 614 615Overview of changes leading to 2.8.1 616Tuesday, May 4, 2021 617==================================== 618- Subsetter now fully supports GSUB/GPOS/GDEF tables (including variations); as 619 such, layout tables are retained by subsetter by default. (Garret Rieger, Qunxin Liu) 620- Build scripts no longer check for FontConfig as HarfBuzz does not use it. 621- hb-view supports iTerm2 and kitty inline image protocols (Khaled Hosny), 622 it can also use Chafa for terminal graphics if available (Hans Petter Jansson). 623 624Overview of changes leading to 2.8.0 625Tuesday, March 16, 2021 626==================================== 627- Shape joining scripts other than Arabic/Syriac using the Universal Shaping Engine. 628 Previously these were shaped using the generalized Arabic shaper. (David Corbett) 629- Fix regression in shaping of U+0B55 ORIYA SIGN OVERLINE. (David Corbett) 630- Update language tags. (David Corbett) 631- Variations: reduce error: do not round each interpolated delta. (Just van Rossum) 632- Documentation improvements. (Khaled Hosny, Nathan Willis) 633- Subsetter improvements: subsets most, if not all, lookup types now. (Garret Rieger, Qunxin Liu) 634- Fuzzer-found fixes and other improvements when memory failures happen. (Behdad) 635- Removed most atomic implementations now that we have C++11 atomic impl. (Behdad) 636- General codebase upkeep; using more C++11 features: constexpr constructors, etc. (Behdad) 637 638 639Overview of changes leading to 2.7.4 640Sunday, December 27, 2020 641==================================== 642- Fix missing --enable-introspection configure option from previous release 643 tarball. 644- Documentation updates. 645 646 647Overview of changes leading to 2.7.3 648Wednesday, December 23, 2020 649==================================== 650- Update USE shaper to 2020-08-13 specification, and other improvements. 651- Don’t disable liga feature in myanmar shaper, to match Uniscribe. 652- Improvements to language and script tags handling. 653- Update language system tag registry to OpenType 1.8.4 654- Support for serializing and deserializing Unicode buffers. Serialized buffers 655 are now delimited with `<>` or `[]` based on whether it is a Unicode or 656 glyphs buffer. 657- Increase buffer work limits to handle fonts with many complex lookups. 658- Handle more shaping operations in trace output. 659- Memory access fixes. 660- More OOM fixes. 661- Improved documentation. 662- Build system improvements. 663- New API: 664+hb_buffer_has_positions() 665+hb_buffer_serialize() 666+hb_buffer_serialize_unicode() 667+hb_buffer_deserialize_unicode() 668 669 670Overview of changes leading to 2.7.2 671Saturday, August 29, 2020 672==================================== 673- Fix a regression in the previous release that caused a crash with Kaithi. 674- More OOM fixes. 675 676 677Overview of changes leading to 2.7.1 678Thursday, August 13, 2020 679==================================== 680- ot-funcs now handles variable empty glyphs better when hvar/vvar isn't present. 681- Reverted a GDEF processing regression. 682- A couple of fixes to handle OOM better. 683 684 685Overview of changes leading to 2.7.0 686Saturday, July 25, 2020 687==================================== 688- Use an implementation for round that always rounds up, some minor fluctuations 689 are expected on var font specially when hb-ot callback is used. 690- Fix an AAT's `kerx` issue on broken rendering of Devanagari Sangam MN. 691- Remove AAT's `lcar` table support from _get_ligature_carets API, not even much 692 use on macOS installed fonts (only two files). GDEF support is the recommended 693 one and expected to work properly after issues fixed two releases ago. 694- Minor memory fixes to handle OOM better specially in hb-ft. 695- Minor .so files versioning scheme change and remove stable/unstable scheme 696 differences, was never used in practice (always default to stable scheme). 697- We are now suggesting careful packaging of the library using meson, 698 https://github.com/harfbuzz/harfbuzz/wiki/Notes-on-migration-to-meson 699 for more information. 700- Distribution package URL is changed, either use GitHub generated tarballs, 701 `https://github.com/harfbuzz/harfbuzz/archive/$pkgver.tar.gz` 702 or, even more preferably use commit hash of the release and git checkouts like, 703 `git+https://github.com/harfbuzz/harfbuzz#commit=$commit` 704 705 706Overview of changes leading to 2.6.8 707Monday, June 22, 2020 708==================================== 709- New API to fetch glyph alternates from GSUB table. 710- hb-coretext build fix for macOS < 10.10. 711- Meson build fixes, cmake port removal is postponed but please prepare for 712 it and give us feedback. 713 Autotools is still our main build system however please consider 714 experimenting with meson also for packaging the library. 715- New API: 716+hb_ot_layout_lookup_get_glyph_alternates() 717 718 719Overview of changes leading to 2.6.7 720Wednesday, June 3, 2020 721==================================== 722- Update to Unicode 13.0.0. 723- Fix hb_ot_layout_get_ligature_carets for fonts without lcar table, it was 724 completely broken for all the other fonts since 2.1.2. 725- As a part of our migration to meson, this release will be the last one 726 to provide cmake port files but autotools still is our main build system. 727 There is a possibility that the next version or the after be released 728 using meson. 729 730 731Overview of changes leading to 2.6.6 732Tuesday, May 12, 2020 733==================================== 734- A fix in AAT kerning for Geeza Pro. 735- Better support for resource fork fonts on macOS. 736 737 738Overview of changes leading to 2.6.5 739Friday, April 17, 2020 740==================================== 741- Add experimental meson build system. Autotools is still the primary 742 and supported build system. 743- AAT is now always preferred for horizontal scripts when both AAT and OT 744 layout tables exist at the same time. 745- Subsetter improvements. 746- New API: 747+hb_ft_font_lock_face() 748+hb_ft_font_unlock_face() 749 750 751Overview of changes leading to 2.6.4 752Monday, October 29, 2019 753==================================== 754- Small bug fix. 755- Build fixes. 756 757 758Overview of changes leading to 2.6.3 759Monday, October 28, 2019 760==================================== 761- Misc small fixes, mostly to build-related issues. 762- New API: 763+hb_font_get_nominal_glyphs() 764 765 766Overview of changes leading to 2.6.2 767Monday, September 30, 2019 768==================================== 769- Misc small fixes, mostly to build-related issues. 770 771 772Overview of changes leading to 2.6.1 773Thursday, August 22, 2019 774==================================== 775- Fix regression with hb_font_create_sub_font scaling introduced in 2.6.0. 776- Change interpretation of font PTEM size / CoreText font size handling. 777 See https://github.com/harfbuzz/harfbuzz/pull/1484 778- hb-ot-font: Prefer symbol cmap subtable if present. 779- Apply 'dist'/'abvm'/'blwm' features to all scripts. 780- Drop experimental DirectWrite API. 781 782 783Overview of changes leading to 2.6.0 784Tuesday, August 13, 2019 785==================================== 786- New OpenType metrics, baseline, and metadata table access APIs. 787- New API to set font variations to a named-instance. 788- New hb-gdi.h header and API for creating hb_face_t from HFONT. 789- Amalgam: Provide a single-file harfbuzz.cc file for easier alternate building. 790- More size-reduction configurable options, enabled by HB_TINY. 791- New API: 792+hb_font_set_var_named_instance() 793+hb_gdi_face_create() 794+hb_ot_layout_baseline_tag_t 795+hb_ot_layout_get_baseline() 796+hb_ot_meta_tag_t 797+hb_ot_meta_get_entry_tags() 798+hb_ot_meta_reference_entry() 799+hb_ot_metrics_tag_t 800+hb_ot_metrics_get_position() 801+hb_ot_metrics_get_variation() 802+hb_ot_metrics_get_x_variation() 803+hb_ot_metrics_get_y_variation() 804 805 806Overview of changes leading to 2.5.3 807Wednesday, June 26, 2019 808==================================== 809- Fix UCD script data for Unicode 10+ scripts. This was broken since 2.5.0. 810- More optimizations for HB_TINY. 811 812 813Overview of changes leading to 2.5.2 814Thursday, June 20, 2019 815==================================== 816- More hb-config.hh facilities to shrink library size, namely when built as 817 HB_TINY. 818- New documentation of custom configurations in CONFIG.md. 819- Fix build on gcc 4.8. That's supported again. 820- Universal Shaping Engine improvements thanks to David Corbett. 821- API Changes: Undeprecate some horizontal-kerning API and re-enable in hb-ft, 822 such that Type1 fonts will continue kerning. 823 824 825Overview of changes leading to 2.5.1 826Friday, May 31, 2019 827==================================== 828- Fix build with various versions of Visual Studio. 829- Improved documentation, thanks to Nathan Willis. 830- Bugfix in subsetting glyf table. 831- Improved scripts for cross-compiling for Windows using mingw. 832- Rename HB_MATH_GLYPH_PART_FLAG_EXTENDER to HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER. 833 A deprecated macro is added for backwards-compatibility. 834 835 836Overview of changes leading to 2.5.0 837Friday, May 24, 2019 838==================================== 839- This release does not include much functional changes, but includes major internal 840 code-base changes. We now require C++11. Support for gcc 4.8 and earlier has been 841 dropped. 842- New hb-config.hh facility for compiling smaller library for embedded and web usecases. 843- New Unicode Character Database implementation that is half the size of previously-used 844 UCDN. 845- Subsetter improvements. 846- Improved documentation, thanks to Nathan Willis. 847- Misc shaping fixes. 848 849 850Overview of changes leading to 2.4.0 851Monday, March 25, 2019 852==================================== 853- Unicode 12. 854- Misc fixes. 855- Subsetter improvements. 856- New API: 857HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE 858hb_directwrite_face_create() 859 860 861Overview of changes leading to 2.3.1 862Wednesday, January 30, 2019 863==================================== 864- AAT bug fixes. 865- Misc internal housekeeping cleanup. 866 867 868Overview of changes leading to 2.3.0 869Thursday, December 20, 2018 870==================================== 871- Fix regression on big-endian architectures. Ouch! 872- Misc bug and build fixes. 873- Fix subsetting of simple GSUB/GDEF. 874- Merge CFF / CFF2 support contributed by Adobe. This mostly involves 875 the subsetter, but also get_glyph_extents on CFF fonts. 876 877New API in hb-aat.h: 878+hb_aat_layout_has_substitution() 879+hb_aat_layout_has_positioning() 880+hb_aat_layout_has_tracking() 881 882 883Overview of changes leading to 2.2.0 884Thursday, November 29, 2018 885==================================== 886- Misc shaping bug fixes. 887- Add font variations named-instance API. 888- Deprecate font variations axis enumeration API and add replacement. 889- AAT shaping improvements: 890 o Fixed 'kern' table Format 2 implementation. 891 o Implement 'feat' table API for feature detection. 892 o Blacklist 'GSUB' table of fonts from 'MUTF' foundry that also have 'morx'. 893 894New API: 895+hb_aat_layout_feature_type_t 896+hb_aat_layout_feature_selector_t 897+hb_aat_layout_get_feature_types() 898+hb_aat_layout_feature_type_get_name_id 899+hb_aat_layout_feature_selector_info_t 900+HB_AAT_LAYOUT_NO_SELECTOR_INDEX 901+hb_aat_layout_feature_type_get_selector_infos() 902+hb_ot_var_axis_flags_t 903+hb_ot_var_axis_info_t 904+hb_ot_var_get_axis_infos() 905+hb_ot_var_find_axis_info() 906+hb_ot_var_get_named_instance_count() 907+hb_ot_var_named_instance_get_subfamily_name_id() 908+hb_ot_var_named_instance_get_postscript_name_id() 909+hb_ot_var_named_instance_get_design_coords() 910 911Deprecated API: 912+HB_OT_VAR_NO_AXIS_INDEX 913+hb_ot_var_axis_t 914+hb_ot_var_get_axes() 915+hb_ot_var_find_axis() 916 917 918Overview of changes leading to 2.1.3 919Friday, November 16, 2018 920==================================== 921- Fix AAT 'mort' shaping, which was broken in 2.1.2 922 923 924Overview of changes leading to 2.1.2 925Friday, November 16, 2018 926==================================== 927- Various internal changes. 928- AAT shaping improvements: 929 o Implement kern table Format 1 state-machine-based kerning. 930 o Implement cross-stream kerning (cursive positioning, etc). 931 o Ignore emptyish GSUB tables (zero scripts) if morx present. 932 o Don't apply GPOS if morx is being applied. Matches Apple. 933 934 935-Overview of changes leading to 2.1.1 936Monday, November 5, 2018 937==================================== 938- AAT improvements: 939 o Implement 'mort' table. 940 o Implement 'kern' subtables Format 1 and Format 3. 941 942 943Overview of changes leading to 2.1.0 944Tuesday, October 30, 2018 945==================================== 946- AAT shaping improvements: 947 o Allow user controlling AAT features, for whole buffer only currently. 948 o Several 'morx' fixes. 949 o Implement tuple-kerns in 'kerx'; Fixes kerning with Apple default 950 San Francisco fonts. 951- Support for color fonts: 952 o COLR/CPAL API to fetch color layers. 953 o SVG table to fetch SVG documents. 954 o CBDT/sbix API to fetch PNG images. 955- New 'name' table API. 956- hb-ot-font now uses 'VORG' table to correctly position CFF glyphs 957 in vertical layout. 958- Various fuzzer-found bug fixes. 959 960Changed API: 961 962A type and a macro added in 2.0.0 were renamed: 963 964hb_name_id_t -> hb_ot_name_id_t 965HB_NAME_ID_INVALID -> HB_OT_NAME_ID_INVALID 966 967New API: 968 969+hb_color_t 970+HB_COLOR 971+hb_color_get_alpha() 972+hb_color_get_red() 973+hb_color_get_green() 974+hb_color_get_blue() 975+hb_ot_color_has_palettes() 976+hb_ot_color_palette_get_count() 977+hb_ot_color_palette_get_name_id() 978+hb_ot_color_palette_color_get_name_id() 979+hb_ot_color_palette_flags_t 980+hb_ot_color_palette_get_flags() 981+hb_ot_color_palette_get_colors() 982+hb_ot_color_has_layers() 983+hb_ot_color_layer_t 984+hb_ot_color_glyph_get_layers() 985+hb_ot_color_has_svg() 986+hb_ot_color_glyph_reference_svg() 987+hb_ot_color_has_png() 988+hb_ot_color_glyph_reference_png() 989 990+hb_ot_name_id_t 991+HB_OT_NAME_ID_INVALID 992+HB_OT_NAME_ID_COPYRIGHT 993+HB_OT_NAME_ID_FONT_FAMILY 994+HB_OT_NAME_ID_FONT_SUBFAMILY 995+HB_OT_NAME_ID_UNIQUE_ID 996+HB_OT_NAME_ID_FULL_NAME 997+HB_OT_NAME_ID_VERSION_STRING 998+HB_OT_NAME_ID_POSTSCRIPT_NAME 999+HB_OT_NAME_ID_TRADEMARK 1000+HB_OT_NAME_ID_MANUFACTURER 1001+HB_OT_NAME_ID_DESIGNER 1002+HB_OT_NAME_ID_DESCRIPTION 1003+HB_OT_NAME_ID_VENDOR_URL 1004+HB_OT_NAME_ID_DESIGNER_URL 1005+HB_OT_NAME_ID_LICENSE 1006+HB_OT_NAME_ID_LICENSE_URL 1007+HB_OT_NAME_ID_TYPOGRAPHIC_FAMILY 1008+HB_OT_NAME_ID_TYPOGRAPHIC_SUBFAMILY 1009+HB_OT_NAME_ID_MAC_FULL_NAME 1010+HB_OT_NAME_ID_SAMPLE_TEXT 1011+HB_OT_NAME_ID_CID_FINDFONT_NAME 1012+HB_OT_NAME_ID_WWS_FAMILY 1013+HB_OT_NAME_ID_WWS_SUBFAMILY 1014+HB_OT_NAME_ID_LIGHT_BACKGROUND 1015+HB_OT_NAME_ID_DARK_BACKGROUND 1016+HB_OT_NAME_ID_VARIATIONS_PS_PREFIX 1017+hb_ot_name_entry_t 1018+hb_ot_name_list_names() 1019+hb_ot_name_get_utf8() 1020+hb_ot_name_get_utf16() 1021+hb_ot_name_get_utf32() 1022 1023 1024Overview of changes leading to 2.0.2 1025Saturday, October 20, 2018 1026==================================== 1027- Fix two minor memory access issues in AAT tables. 1028 1029 1030Overview of changes leading to 2.0.1 1031Friday, October 19, 2018 1032==================================== 1033- Fix hb-version.h reported release version that went wrong (1.8.0) 1034 with previous release. 1035- Fix extrapolation in 'trak' table. 1036- Fix hb-font infinite-recursion issue with some font funcs and 1037 subclassed fonts. 1038- Implement variation-kerning format in kerx table, although without 1039 variation. 1040- Fix return value of hb_map_is_empty(). 1041 1042 1043Overview of changes leading to 2.0.0 1044Thursday, October 18, 2018 1045==================================== 1046- Added AAT shaping support (morx/kerx/trak). 1047 Automatically used if GSUB/GPOS are not available respectively. 1048 Set HB_OPTIONS=aat env var to have morx/kerx preferred over 1049 GSUB/GPOS. 1050- Apply TrueType kern table internally, instead of relying on 1051 hb_font_t callbacks. 1052- Khmer shaper significantly rewritten to better match Uniscribe. 1053- Indic3 tags ('dev3', etc) are passed to USE shaper. 1054- .dfont Mac font containers implemented. 1055- Script- and language-mapping revamped to better use BCP 47. 1056- Misc USE and Indic fixes. 1057- Misc everything fixes. 1058- Too many things to list. Biggest release since 0.9.1, with 1059 over 500 commits in just over 5 weeks! Didn't intend it to 1060 be a big release. Just happened to become. 1061- hb-ft now locks underlying FT_Face during use. 1062 1063API changes: 1064 1065- Newly-created hb_font_t's now have our internal "hb-ot-font" 1066 callbacks set on them, so they should work out of the box 1067 without any callbacks set. If callbacks are set, everything 1068 is back to what it was before, the fallback callbacks are 1069 null. If you to get the internal implementation modified, 1070 sub_font it. 1071 1072- New hb_font_funcs_set_nominal_glyphs_func() allows speeding 1073 up character to glyph mapping. 1074 1075New API: 1076+HB_FEATURE_GLOBAL_START 1077+HB_FEATURE_GLOBAL_END 1078+hb_buffer_set_invisible_glyph() 1079+hb_buffer_get_invisible_glyph() 1080+hb_font_funcs_set_nominal_glyphs_func() 1081+hb_ot_layout_table_select_script() 1082+hb_ot_layout_script_select_language() 1083+hb_ot_layout_feature_get_name_ids() 1084+hb_ot_layout_feature_get_characters() 1085+hb_name_id_t 1086+HB_NAME_ID_INVALID 1087+HB_OT_MAX_TAGS_PER_SCRIPT 1088+hb_ot_tags_from_script_and_language() 1089+hb_ot_tags_to_script_and_language() 1090 1091Deprecated API: 1092-hb_font_funcs_set_glyph_func() 1093-hb_unicode_eastasian_width_func_t 1094-hb_unicode_funcs_set_eastasian_width_func() 1095-hb_unicode_eastasian_width() 1096-hb_unicode_decompose_compatibility_func_t 1097-HB_UNICODE_MAX_DECOMPOSITION_LEN 1098-hb_unicode_funcs_set_decompose_compatibility_func() 1099-hb_unicode_decompose_compatibility() 1100-hb_font_funcs_set_glyph_h_kerning_func() 1101-hb_font_funcs_set_glyph_v_kerning_func() 1102-hb_font_get_glyph_h_kerning() 1103-hb_font_get_glyph_v_kerning() 1104-hb_font_get_glyph_kerning_for_direction() 1105-hb_ot_layout_table_choose_script() 1106-hb_ot_layout_script_find_language() 1107-hb_ot_tags_from_script() 1108-hb_ot_tag_from_language() 1109 1110 1111Overview of changes leading to 1.9.0 1112Monday, September 10, 2018 1113==================================== 1114- Added 'cmap' API to hb_face_t. 1115- Face-builder API. 1116- hb-ot-font re-creation should be much leaner now, as the 1117 font tables it uses are cached on hb_face_t now. 1118- Internal source header file name changes: 1119 hb-*-private.hh is renamed to hb-*.hh. 1120 1121New API: 1122+HB_UNICODE_MAX 1123+hb_face_collect_unicodes() 1124+hb_face_collect_variation_selectors() 1125+hb_face_collect_variation_unicodes() 1126+hb_face_builder_create() 1127+hb_face_builder_add_table() 1128 1129 1130Overview of changes leading to 1.8.8 1131Tuesday, August 14, 2018 1132==================================== 1133- Fix hb-icu crash on architectures where compare_exchange_weak() can 1134 fail falsely. This bug was introduced in 1.8.4. 1135 https://bugs.chromium.org/p/chromium/issues/detail?id=873568 1136- More internal refactoring of atomic operations and singletons. 1137- API changes: 1138 The following functions do NOT reference their return value before 1139 returning: 1140 * hb_unicode_funcs_get_default() 1141 * hb_glib_get_unicode_funcs() 1142 * hb_icu_get_unicode_funcs() 1143 This is consistent with their naming ("get", instead of "reference") 1144 as well as how they are used in the wild (ie. no one calls destroy() 1145 on their return value.) 1146 1147 1148Overview of changes leading to 1.8.7 1149Wednesday, August 8, 2018 1150==================================== 1151- Fix assertion failure with GDEF-blacklisted fonts. 1152 1153 1154Overview of changes leading to 1.8.6 1155Tuesday, August 7, 2018 1156==================================== 1157- Internal code shuffling. 1158- New API to speed up getting advance widths for implementations 1159 that have heavy overhead in get_h_advance callback: 1160+hb_font_funcs_set_glyph_h_advances_func 1161+hb_font_funcs_set_glyph_v_advances_func 1162+hb_font_get_glyph_advances_for_direction 1163+hb_font_get_glyph_h_advances 1164+hb_font_get_glyph_h_advances_func_t 1165+hb_font_get_glyph_v_advances 1166+hb_font_get_glyph_v_advances_func_t 1167 1168 1169Overview of changes leading to 1.8.5 1170Wednesday, August 1, 2018 1171==================================== 1172- Major Khmer shaper improvements to better match Microsoft. 1173- Indic bug fixes. 1174- Internal improvements to atomic operations. 1175 1176 1177Overview of changes leading to 1.8.4 1178Tuesday, July 17, 2018 1179==================================== 1180- Fix build on non-C++11. 1181- Use C++-style GCC atomics and C++11 atomics. 1182 1183 1184Overview of changes leading to 1.8.3 1185Wednesday, July 11, 2018 1186==================================== 1187- A couple of Indic / USE bug fixes. 1188- Disable vectorization, as it was causing unaligned access bus error on 1189 certain 32bit architectures. 1190 1191 1192Overview of changes leading to 1.8.2 1193Tuesday, July 3, 2018 1194==================================== 1195- Fix infinite loop in Khmer shaper. 1196- Improve hb_blob_create_from_file() for streams. 1197 1198 1199Overview of changes leading to 1.8.1 1200Tuesday, June 12, 2018 1201==================================== 1202- Fix hb-version.h file generation; last two releases went out with wrong ones. 1203- Add correctness bug in hb_set_t operations, introduced in 1.7.7. 1204- Remove HB_SUBSET_BUILTIN build option. Not necessary. 1205 1206 1207Overview of changes leading to 1.8.0 1208Tuesday, June 5, 2018 1209==================================== 1210- Update to Unicode 11.0.0. 1211 1212 1213Overview of changes leading to 1.7.7 1214Tuesday, June 5, 2018 1215==================================== 1216- Lots of internal changes, but not yet exposed externally. 1217- All HarfBuzz objects are significantly smaller in size now. 1218- Sinhala: Position repha on top of post-consonant, not base. 1219 This better matches Windows 10 behavior, which was changed 1220 from previous Windows versions. 1221- New build options: 1222 o New cpp macro HB_NO_ATEXIT 1223 o New cpp macro HB_SUBSET_BUILTIN 1224- Significant libharfbuzz-subset changes. API subject to change. 1225- New API in libharfbuzz: 1226 1227+hb_blob_create_from_file() 1228+hb_face_count() 1229 1230A hashmap implementation: 1231+hb-map.h 1232+HB_MAP_VALUE_INVALID 1233+hb_map_t 1234+hb_map_create() 1235+hb_map_get_empty() 1236+hb_map_reference() 1237+hb_map_destroy() 1238+hb_map_set_user_data() 1239+hb_map_get_user_data() 1240+hb_map_allocation_successful() 1241+hb_map_clear() 1242+hb_map_is_empty() 1243+hb_map_get_population() 1244+hb_map_set() 1245+hb_map_get() 1246+hb_map_del() 1247+hb_map_has() 1248 1249 1250Overview of changes leading to 1.7.6 1251Wednesday, March 7, 2018 1252==================================== 1253 1254- Fix to hb_set_t binary operations. Ouch. 1255- New experimental harfbuzz-subset library. All of hb-subset.h 1256 is experimental right now and API WILL change. 1257 1258- New API: 1259hb_blob_copy_writable_or_fail() 1260HB_OT_TAG_BASE 1261hb_set_previous() 1262hb_set_previous_range() 1263 1264 1265Overview of changes leading to 1.7.5 1266Tuesday, January 30, 2018 1267==================================== 1268 1269- Separate Khmer shaper from Indic. 1270- First stab at AAT morx. Not hooked up. 1271- Misc bug fixes. 1272 1273 1274Overview of changes leading to 1.7.4 1275Wednesday, December 20, 2017 1276==================================== 1277 1278- Fix collect_glyphs() regression caused by hb_set_t changes. 1279 1280 1281Overview of changes leading to 1.7.3 1282Monday, December 18, 2017 1283==================================== 1284 1285- hb_set_t performance tuning and optimizations. 1286- Speed up collect_glyphs() and reject garbage data. 1287- In hb_coretext_font_create() set font point-size (ptem). 1288- Misc fixes. 1289 1290 1291Overview of changes leading to 1.7.2 1292Monday, December 4, 2017 1293==================================== 1294 1295- Optimize hb_set_add_range(). 1296- Misc fixes. 1297- New API: 1298hb_coretext_font_create() 1299 1300 1301Overview of changes leading to 1.7.1 1302Tuesday, November 14, 2017 1303==================================== 1304 1305- Fix atexit object destruction regression. 1306- Fix minor integer-overflow. 1307 1308 1309Overview of changes leading to 1.7.0 1310Monday, November 13, 2017 1311==================================== 1312 1313- Minor Indic fixes. 1314- Implement kerning and glyph names in hb-ot-font. 1315- Various DSO optimization re .data and .bss sizes. 1316- Make C++11 optional; build fixes. 1317- Mark all other backends "unsafe-to-break". 1318- Graphite fix. 1319 1320 1321Overview of changes leading to 1.6.3 1322Thursday, October 26th, 2017 1323==================================== 1324 1325- Fix hb_set_t some more. Should be solid now. 1326- Implement get_glyph_name() for hb-ot-font. 1327- Misc fixes. 1328 1329 1330Overview of changes leading to 1.6.2 1331Monday, October 23nd, 2017 1332==================================== 1333 1334- Yesterday's release had a bad crasher; don't use it. That's what 1335 happens when one works on Sunday... 1336 https://github.com/harfbuzz/harfbuzz/issues/578 1337- Build fixes for FreeBSD and Chrome Android. 1338 1339 1340Overview of changes leading to 1.6.1 1341Sunday, October 22nd, 2017 1342==================================== 1343 1344- Don't skip over COMBINING GRAPHEME JOINER when ligating, etc. 1345 To be refined: https://github.com/harfbuzz/harfbuzz/issues/554 1346- Faster hb_set_t implementation. 1347- Don't use deprecated ICU API. 1348- Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0 1349- Deprecated API: 1350 hb_set_invert() 1351 1352 1353Overview of changes leading to 1.6.0 1354Friday, October the 13th, 2017 1355==================================== 1356 1357- Update to Unicode 10. 1358 1359- Various Indic and Universal Shaping Engine fixes as a result of 1360 HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at 1361 the Igalia offices in A Coruña, Spain. Thanks Igalia for having 1362 us! 1363 1364- Implement Unicode Arabic Mark Ordering Algorithm UTR#53. 1365 1366- Implement optical sizing / tracking in CoreText backend, using 1367 new API hb_font_set_ptem(). 1368 1369- Allow notifying hb_font_t that underlying FT_Face changed sizing, 1370 using new API hb_ft_font_changed(). 1371 1372- More Graphite backend RTL fixes. 1373 1374- Fix caching of variable font shaping plans. 1375 1376- hb-view / hb-shape now accept following new arguments: 1377 1378 o --unicodes: takes a list of hex numbers that represent Unicode 1379 codepoints. 1380 1381New API: 1382+hb_face_get_table_tags() 1383+hb_font_set_ptem() 1384+hb_font_get_ptem() 1385+hb_ft_font_changed() 1386 1387 1388Overview of changes leading to 1.5.1 1389Tuesday, September 5, 2017 1390==================================== 1391 1392- Fix "unsafe-to-break" in fallback shaping and other corner cases. 1393 All our tests pass with --verify now, meaning unsafe-to-break API 1394 works as expected. 1395- Add --unicodes to hb-view / hb-shape. 1396- [indic] Treat Consonant_With_Stacker as consonant. This will need 1397 further tweaking. 1398- hb_buffer_diff() tweaks. 1399 1400 1401Overview of changes leading to 1.5.0 1402Wednesday, August 23, 2017 1403==================================== 1404 1405- Misc new API, for appending a buffer to another, and for comparing 1406 contents of two buffers for types of differences. 1407 1408- New "unsafe-to-break" API. Can be used to speed up reshaping 1409 in line-breaking situations. Essentially, after shaping, it returns 1410 positions in the input string (some of the cluster boundaries) that 1411 are "safe to break" in that if the text is segmented at that position 1412 and two sides reshaped and concatenated, the shaping result is 1413 exactly the same as shaping the text in one piece. 1414 1415 hb-view and hb-shape and hb-shape now take --verify, which verifies 1416 the above property. 1417 1418 Some corner cases of the implementation are still not quite working. 1419 Those will be fixed in subsequent releases. 1420 1421- New API: 1422 1423hb_buffer_append() 1424 1425hb_glyph_flags_t 1426HB_GLYPH_FLAG_UNSAFE_TO_BREAK 1427HB_GLYPH_FLAG_DEFINED 1428hb_glyph_info_get_glyph_flags() 1429 1430HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS 1431 1432hb_buffer_diff_flags_t 1433HB_BUFFER_DIFF_FLAG_EQUAL 1434HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH 1435HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH 1436HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT 1437HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT 1438HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH 1439HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH 1440HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH 1441HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH 1442hb_buffer_diff 1443 1444 1445Overview of changes leading to 1.4.8 1446Tuesday, August 8, 2017 1447==================================== 1448 1449- Major fix to avar table handling. 1450- Rename hb-shape --show-message to --trace. 1451- Build fixes. 1452 1453 1454Overview of changes leading to 1.4.7 1455Tuesday, July 18, 2017 1456==================================== 1457 1458- Multiple Indic, Tibetan, and Cham fixes. 1459- CoreText: Allow disabling kerning. 1460- Adjust Arabic feature order again. 1461- Misc build fixes. 1462 1463 1464Overview of changes leading to 1.4.6 1465Sunday, April 23, 2017 1466==================================== 1467 1468- Graphite2: Fix RTL positioning issue. 1469- Backlist GDEF of more versions of Padauk and Tahoma. 1470- New, experimental, cmake alternative build system. 1471 1472 1473Overview of changes leading to 1.4.5 1474Friday, March 10, 2017 1475==================================== 1476 1477- Revert "Fix Context lookup application when moving back after a glyph..." 1478 This introduced memory access problems. To be fixed properly soon. 1479 1480 1481Overview of changes leading to 1.4.4 1482Sunday, March 5, 2017 1483==================================== 1484 1485- Fix Context lookup application when moving back after a glyph deletion. 1486- Fix buffer-overrun in Bengali. 1487 1488 1489Overview of changes leading to 1.4.3 1490Saturday, February 25, 2017 1491==================================== 1492 1493- Route Adlam script to Arabic shaper. 1494- Misc fixes. 1495- New API: 1496 hb_font_set_face() 1497- Deprecate API: 1498 hb_graphite2_font_get_gr_font() 1499 1500 1501Overview of changes leading to 1.4.2 1502Monday, January 23, 2017 1503==================================== 1504 1505- Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR. 1506- hb-shape and hb-view now accept --variations. 1507- New API: 1508 1509hb_variation_t 1510hb_variation_from_string() 1511hb_variation_to_string() 1512 1513hb_font_set_variations() 1514hb_font_set_var_coords_design() 1515hb_font_get_var_coords_normalized() 1516 1517hb-ot-var.h: 1518hb_ot_var_axis_t 1519hb_ot_var_has_data() 1520hb_ot_var_get_axis_count() 1521hb_ot_var_get_axes() 1522hb_ot_var_find_axis() 1523hb_ot_var_normalize_variations() 1524hb_ot_var_normalize_coords() 1525 1526- MVAR to be implemented later. Access to named instances to be 1527 implemented later as well. 1528 1529- Misc fixes. 1530 1531 1532Overview of changes leading to 1.4.1 1533Thursday, January 5, 2017 1534==================================== 1535 1536- Always build and use UCDN for Unicode data by default. 1537 Reduces dependence on version of Unicode data in glib, 1538 specially in the Windows bundles we are shipping, which 1539 have very old glib. 1540 1541 1542Overview of changes leading to 1.4.0 1543Thursday, January 5, 2017 1544==================================== 1545 1546- Merged "OpenType GX" branch which adds core of support for 1547 OpenType 1.8 Font Variations. To that extent, the relevant 1548 new API is: 1549 1550New API: 1551hb_font_set_var_coords_normalized() 1552 1553 with supporting API: 1554 1555New API: 1556HB_OT_LAYOUT_NO_VARIATIONS_INDEX 1557hb_ot_layout_table_find_feature_variations() 1558hb_ot_layout_feature_with_variations_get_lookups() 1559hb_shape_plan_create2() 1560hb_shape_plan_create_cached2() 1561 1562 Currently variations in GSUB/GPOS/GDEF are fully supported, 1563 and no other tables are supported. In particular, fvar/avar 1564 are NOT supported, hence the hb_font_set_var_coords_normalized() 1565 taking normalized coordinates. API to take design coordinates 1566 will be added in the future. 1567 1568 HVAR/VVAR/MVAR support will also be added to hb-ot-font in the 1569 future. 1570 1571- Fix regression in GDEF glyph class processing. 1572- Add decompositions for Chakma, Limbu, and Balinese in USE shaper. 1573- Misc fixes. 1574 1575 1576Overview of changes leading to 1.3.4 1577Monday, December 5, 2016 1578==================================== 1579 1580- Fix vertical glyph origin in hb-ot-font. 1581- Implement CBDT/CBLC color font glyph extents in hb-ot-font. 1582 1583 1584Overview of changes leading to 1.3.3 1585Wednesday, September 28, 2016 1586==================================== 1587 1588- Implement parsing of OpenType MATH table. 1589New API: 1590HB_OT_TAG_MATH 1591HB_OT_MATH_SCRIPT 1592hb_ot_math_constant_t 1593hb_ot_math_kern_t 1594hb_ot_math_glyph_variant_t 1595hb_ot_math_glyph_part_flags_t 1596hb_ot_math_glyph_part_t 1597hb_ot_math_has_data 1598hb_ot_math_get_constant 1599hb_ot_math_get_glyph_italics_correction 1600hb_ot_math_get_glyph_top_accent_attachment 1601hb_ot_math_get_glyph_kerning 1602hb_ot_math_is_glyph_extended_shape 1603hb_ot_math_get_glyph_variants 1604hb_ot_math_get_min_connector_overlap 1605hb_ot_math_get_glyph_assembly 1606 1607 1608Overview of changes leading to 1.3.2 1609Wednesday, September 27, 2016 1610==================================== 1611 1612- Fix build of hb-coretext on older OS X versions. 1613 1614 1615Overview of changes leading to 1.3.1 1616Wednesday, September 7, 2016 1617==================================== 1618 1619- Blacklist bad GDEF of more fonts (Padauk). 1620- More CoreText backend crash fixes with OS X 10.9.5. 1621- Misc fixes. 1622 1623 1624Overview of changes leading to 1.3.0 1625Thursday, July 21, 2016 1626==================================== 1627 1628- Update to Unicode 9.0.0 1629- Move Javanese from Indic shaper to Universal Shaping Engine. 1630- Allow MultipleSubst to delete a glyph (matching Windows engine). 1631- Update Universal Shaping Engine to latest draft from Microsoft. 1632- DirectWrite backend improvements. Note: this backend is for testing ONLY. 1633- CoreText backend improvements with unreachable fonts. 1634- Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font. 1635- Blacklist bad GDEF of more fonts (Tahoma & others). 1636- Misc fixes. 1637 1638 1639Overview of changes leading to 1.2.7 1640Monday, May 2, 2016 1641==================================== 1642 1643- Blacklist another version of Times New Roman (Bold) Italic from Windows 7. 1644- Fix Mongolian Free Variation Selectors shaping with certain fonts. 1645- Fix Tibetan shorthand contractions shaping. 1646- Improved list of language tag mappings. 1647- Unbreak build on Windows CE. 1648- Make 'glyf' table loading lazy in hb-ot-font. 1649 1650 1651Overview of changes leading to 1.2.6 1652Friday, April 8, 2016 1653==================================== 1654 1655- Blacklist GDEF table of another set of Times New Roman (Bold) Italic. 1656- DirectWrite backend improvements. Note: DirectWrite backend is 1657 exclusively for our internal testing and should NOT be used in any 1658 production system whatsoever. 1659 1660 1661Overview of changes leading to 1.2.5 1662Monday, April 4, 2016 1663==================================== 1664 1665- Fix GDEF mark-filtering-set, which was broken in 1.2.3. 1666 1667 1668Overview of changes leading to 1.2.4 1669Thursday, March 17, 2016 1670==================================== 1671 1672- Synthesize GDEF glyph class for any glyph that does not have one in GDEF. 1673 I really hope we don't discover broken fonts that shape badly with this 1674 change. 1675- Misc build and other minor fixes. 1676- API changes: 1677 - Added HB_NDEBUG. It's fine for production systems to define this to 1678 disable high-overhead debugging checks. However, I also reduced the 1679 overhead of those checks, so it's a non-issue right now. You can 1680 forget it. Just not defining anything at all is fine. 1681 1682 1683Overview of changes leading to 1.2.3 1684Thursday, February 25, 2016 1685==================================== 1686 1687- Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic, 1688 due to bug in glyph class of ASCII double-quote character. This should 1689 address "regression" introduced in 1.2.0 when we switched mark zeroing 1690 in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE. 1691 This fourth release in a week should finally stabilize things... 1692 1693- hb-ot-font's get_glyph() implementation saw some optimizations. Though, 1694 might be really hard to measure in real-world situations. 1695 1696- Also, two rather small API changes: 1697 1698We now disable some time-consuming internal bookkeeping if built with NDEBUG 1699defined. This is a first time that we use NDEBUG to disable debug code. If 1700there exist production systems that do NOT want to enable NDEBUG, please let 1701me know and I'll add HB_NDEBUG. 1702 1703Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph() 1704 1705New API: 1706- hb_font_get_nominal_glyph_func_t 1707- hb_font_get_variation_glyph_func_t 1708- hb_font_funcs_set_nominal_glyph_func() 1709- hb_font_funcs_set_variation_glyph_func() 1710- hb_font_get_nominal_glyph() 1711- hb_font_get_variation_glyph() 1712 1713Deprecated API: 1714- hb_font_get_glyph_func_t 1715- hb_font_funcs_set_glyph_func() 1716 1717Clients that implement their own font-funcs are encouraged to replace 1718their get_glyph() implementation with a get_nominal_glyph() and 1719get_variation_glyph() pair. The variation version can assume that 1720variation_selector argument is not zero. Old (deprecated) functions 1721will continue working indefinitely using internal gymnastics; it is 1722just more efficient to use the new functions. 1723 1724 1725Overview of changes leading to 1.2.2 1726Wednesday, February 24, 2016 1727==================================== 1728 1729- Fix regression with mark positioning with fonts that have 1730 non-zero mark advances. This was introduced in 1.2.0 while 1731 trying to make mark and cursive attachments to work together. 1732 I have partially reverted that, so this version is much more 1733 like what we had before. All clients who updated to 1.2.0 1734 should update to this version. 1735 1736 1737Overview of changes leading to 1.2.1 1738Tuesday, February 23, 2016 1739==================================== 1740 1741- CoreText: Fix bug with wrong scale if font scale was changed later. 1742 https://github.com/libass/libass/issues/212 1743- CoreText: Drastically speed up font initialization. 1744- CoreText: Fix tiny leak. 1745- Group ZWJ/ZWNJ with previous syllable under cluster-level=0. 1746 https://github.com/harfbuzz/harfbuzz/issues/217 1747- Add test/shaping/README.md about how to add tests to the suite. 1748 1749 1750Overview of changes leading to 1.2.0 1751Friday, February 19, 2016 1752==================================== 1753 1754- Fix various issues (hangs mostly) in case of memory allocation failure. 1755- Change mark zeroing types of most shapers from BY_UNICODE_LATE to 1756 BY_GDEF_LATE. This seems to be what Uniscribe does. 1757- Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's 1758 what Windows does. 1759- Allow GPOS cursive connection on marks, and fix the interaction with 1760 mark attachment. This work resulted in some changes to how mark 1761 attachments work. See: 1762 https://github.com/harfbuzz/harfbuzz/issues/211 1763 https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2 1764- Graphite2 shaper: improved negative advance handling (eg. Nastaliq). 1765- Add nmake-based build system for Windows. 1766- Minor speedup. 1767- Misc. improvements. 1768 1769 1770Overview of changes leading to 1.1.3 1771Monday, January 11, 2016 1772==================================== 1773 1774- Ported Indic shaper to Unicode 8.0 data. 1775- Universal Shaping Engine fixes. 1776- Speed up CoreText shaper when font fallback happens in CoreText. 1777- Documentation improvements, thanks to Khaled Hosny. 1778- Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi. 1779- Misc bug fixes. 1780- New API: 1781 1782 * Font extents: 1783 hb_font_extents_t 1784 hb_font_get_font_extents_func_t 1785 hb_font_get_font_h_extents_func_t 1786 hb_font_get_font_v_extents_func_t 1787 hb_font_funcs_set_font_h_extents_func 1788 hb_font_funcs_set_font_v_extents_func 1789 hb_font_get_h_extents 1790 hb_font_get_v_extents 1791 hb_font_get_extents_for_direction 1792 1793 * Buffer message (aka debug): 1794 hb_buffer_message_func_t 1795 hb_buffer_set_message_func() 1796 Actual message protocol to be fleshed out later. 1797 1798 1799Overview of changes leading to 1.1.2 1800Wednesday, November 26, 2015 1801==================================== 1802 1803- Fix badly-broken fallback shaper that affected terminology. 1804 https://github.com/harfbuzz/harfbuzz/issues/187 1805- Fix y_scaling in Graphite shaper. 1806- API changes: 1807 * An unset glyph_h_origin() function in font-funcs now (sensibly) 1808 implies horizontal origin at 0,0. Ie, the nil callback returns 1809 true instead of false. As such, implementations that have a 1810 glyph_h_origin() that simply returns true, can remove that function 1811 with HarfBuzz >= 1.1.2. This results in a tiny speedup. 1812 1813 1814Overview of changes leading to 1.1.1 1815Wednesday, November 24, 2015 1816==================================== 1817 1818- Build fixes, specially for hb-coretext. 1819 1820 1821Overview of changes leading to 1.1.0 1822Wednesday, November 18, 2015 1823==================================== 1824 1825- Implement 'stch' stretch feature for Syriac Abbreviation Mark. 1826 https://github.com/harfbuzz/harfbuzz/issues/141 1827- Disable use of decompose_compatibility() callback. 1828- Implement "shaping" of various Unicode space characters, even 1829 if the font does not support them. 1830 https://github.com/harfbuzz/harfbuzz/issues/153 1831- If font does not support U+2011 NO-BREAK HYPHEN, fallback to 1832 U+2010 HYPHEN. 1833- Changes resulting from libFuzzer continuous fuzzing: 1834 * Reject font tables that need more than 8 edits, 1835 * Bound buffer growth during shaping to 32x, 1836 * Fix assertions and other issues at OOM / buffer max-growth. 1837- Misc fixes and optimizations. 1838- API changes: 1839 * All fonts created with hb_font_create() now inherit from 1840 (ie. have parent) hb_font_get_empty(). 1841 1842 1843Overview of changes leading to 1.0.6 1844Thursday, October 15, 2015 1845==================================== 1846 1847- Reduce max nesting level in OT lookups from 8 to 6. 1848 Should not affect any real font as far as I know. 1849- Fix memory access issue in ot-font. 1850- Revert default load-flags of fonts created using hb_ft_font_create() 1851 back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in 1852 last release (1.0.5), but caused major issues, so revert. 1853 https://github.com/harfbuzz/harfbuzz/issues/143 1854 1855 1856Overview of changes leading to 1.0.5 1857Tuesday, October 13, 2015 1858==================================== 1859 1860- Fix multiple memory access bugs discovered using libFuzzer. 1861 https://github.com/harfbuzz/harfbuzz/issues/139 1862 Everyone should upgrade to this version as soon as possible. 1863 We now have continuous fuzzing set up, to avoid issues like 1864 these creeping in again. 1865- Misc fixes. 1866 1867- New API: 1868 * hb_font_set_parent(). 1869 * hb_ft_font_[sg]et_load_flags() 1870 The default flags for fonts created using hb_ft_font_create() 1871 has changed to default to FT_LOAD_DEFAULT now. Previously it 1872 was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING. 1873 1874- API changes: 1875 * Fonts now default to units-per-EM as their scale, instead of 0. 1876 * hb_font_create_sub_font() does NOT make parent font immutable 1877 anymore. hb_font_make_immutable() does. 1878 1879 1880Overview of changes leading to 1.0.4 1881Wednesday, September 30, 2015 1882==================================== 1883 1884- Fix minor out-of-bounds read error. 1885 1886 1887Overview of changes leading to 1.0.3 1888Tuesday, September 1, 2015 1889==================================== 1890 1891- Start of user documentation, from Simon Cozens! 1892- Implement glyph_extents() for TrueType fonts in hb-ot-font. 1893- Improve GPOS cursive attachments with conflicting lookups. 1894- More fixes for cluster-level = 1. 1895- Uniscribe positioning fix. 1896 1897 1898Overview of changes leading to 1.0.2 1899Wednesday, August 19, 2015 1900==================================== 1901 1902- Fix shaping with cluster-level > 0. 1903- Fix Uniscribe backend font-size scaling. 1904- Declare dependencies in harfbuzz.pc. 1905 FreeType is not declared though, to avoid bugs in pkg-config 1906 0.26 with recursive dependencies. 1907- Slightly improved debug infrastructure. More to come later. 1908- Misc build fixes. 1909 1910 1911Overview of changes leading to 1.0.1 1912Monday, July 27, 2015 1913==================================== 1914 1915- Fix out-of-bounds access in USE shaper. 1916 1917 1918Overview of changes leading to 1.0.0 1919Sunday, July 26, 2015 1920==================================== 1921 1922- Implement Universal Shaping Engine: 1923 https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm 1924 http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/ 1925- Bump version to 1.0.0. The soname was NOT bumped. 1926 1927 1928Overview of changes leading to 0.9.42 1929Thursday, July 26, 2015 1930===================================== 1931 1932- New API to allow for retrieving finer-grained cluster 1933 mappings if the client desires to handle them. Default 1934 behavior is unchanged. 1935- Fix cluster merging when removing default-ignorables. 1936- Update to Unicode 8.0 1937- hb-graphite2 fixes. 1938- Misc fixes. 1939- Removed HB_NO_MERGE_CLUSTERS hack. 1940- New API: 1941 hb_buffer_cluster_level_t enum 1942 hb_buffer_get_cluster_level() 1943 hb_buffer_set_cluster_level() 1944 hb-shape / hb-view --cluster-level 1945 1946 1947Overview of changes leading to 0.9.41 1948Thursday, June 18, 2015 1949===================================== 1950 1951- Fix hb-coretext with trailing whitespace in right-to-left. 1952- New API: hb_buffer_reverse_range(). 1953- Allow implementing atomic ops in config.h. 1954- Fix hb_language_t in language bindings. 1955- Misc fixes. 1956 1957 1958Overview of changes leading to 0.9.40 1959Friday, March 20, 2015 1960===================================== 1961 1962- Another hb-coretext crasher fix. Ouch! 1963- Happy Norouz! 1964 1965 1966Overview of changes leading to 0.9.39 1967Wednesday, March 4, 2015 1968===================================== 1969 1970- Critical hb-coretext fixes. 1971- Optimizations and refactoring; no functional change 1972 expected. 1973- Misc build fixes. 1974 1975 1976Overview of changes leading to 0.9.38 1977Friday, January 23, 2015 1978===================================== 1979 1980- Fix minor out-of-bounds access in Indic shaper. 1981- Change New Tai Lue shaping engine from South-East Asian to default, 1982 reflecting change in Unicode encoding model. 1983- Add hb-shape --font-size. Can take up to two numbers for separate 1984 x / y size. 1985- Fix CoreText and FreeType scale issues with negative scales. 1986- Reject blobs larger than 2GB. This might break some icu-le-hb clients 1987 that need security fixes. See: 1988 http://www.icu-project.org/trac/ticket/11450 1989- Avoid accessing font tables during face destruction, in casce rogue 1990 clients released face data already. 1991- Fix up gobject-introspection a bit. Python bindings kinda working. 1992 See README.python. 1993- Misc fixes. 1994- API additions: 1995 hb_ft_face_create_referenced() 1996 hb_ft_font_create_referenced() 1997 1998 1999Overview of changes leading to 0.9.37 2000Wednesday, December 17, 2014 2001===================================== 2002 2003- Fix out-of-bounds access in Context lookup format 3. 2004- Indic: Allow ZWJ/ZWNJ before syllable modifiers. 2005 2006 2007Overview of changes leading to 0.9.36 2008Thursday, November 20, 2014 2009===================================== 2010 2011- First time that three months went by without a release since 2012 0.9.2 was released on August 10, 2012! 2013- Fix performance bug in hb_ot_collect_glyphs(): 2014 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869 2015- Add basic vertical-text support to hb-ot-font. 2016- Misc build fixes. 2017 2018 2019Overview of changes leading to 0.9.35 2020Saturday, August 13, 2014 2021===================================== 2022 2023- Fix major shape-plan caching bug when more than one shaper were 2024 provided to hb_shape_full() (as exercised by XeTeX). 2025 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html 2026- Fix Arabic fallback shaping regression. This was broken in 0.9.32. 2027- Major hb-coretext fixes. That backend is complete now, including 2028 respecing buffer direction and language, down to vertical writing. 2029- Build fixes for Windows CE. Should build fine now. 2030- Misc fixes: 2031 Use atexit() only if it's safe to call from shared library 2032 https://bugs.freedesktop.org/show_bug.cgi?id=82246 2033 Mandaic had errors in its Unicode Joining_Type 2034 https://bugs.freedesktop.org/show_bug.cgi?id=82306 2035- API changes: 2036 2037 * hb_buffer_clear_contents() does not reset buffer flags now. 2038 2039 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't 2040 need to set flags for different pieces of text. The flags now 2041 are something the client sets up once, depending on how it 2042 actually uses the buffer. As such, don't clear it in 2043 clear_contents(). 2044 2045 I don't expect any changes to be needed to any existing client. 2046 2047 2048Overview of changes leading to 0.9.34 2049Saturday, August 2, 2014 2050===================================== 2051 2052- hb_feature_from_string() now accepts CSS font-feature-settings format. 2053- As a result, hb-shape / hb-view --features also accept CSS-style strings. 2054 Eg, "'liga' off" is accepted now. 2055- Add old-spec Myanmar shaper: 2056 https://bugs.freedesktop.org/show_bug.cgi?id=81775 2057- Don't apply 'calt' in Hangul shaper. 2058- Fix mark advance zeroing for Hebrew shaper: 2059 https://bugs.freedesktop.org/show_bug.cgi?id=76767 2060- Implement Windows-1256 custom Arabic shaping. Only built on Windows, 2061 and requires help from get_glyph(). Used by Firefox. 2062 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139 2063- Disable 'liga' in vertical text. 2064- Build fixes. 2065- API changes: 2066 2067 * Make HB_BUFFER_FLAG_BOT/EOT easier to use. 2068 2069 Previously, we expected users to provide BOT/EOT flags when the 2070 text *segment* was at paragraph boundaries. This meant that for 2071 clients that provide full paragraph to HarfBuzz (eg. Pango), they 2072 had code like this: 2073 2074 hb_buffer_set_flags (hb_buffer, 2075 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) | 2076 (item_offset + item_length == paragraph_length ? 2077 HB_BUFFER_FLAG_EOT : 0)); 2078 2079 hb_buffer_add_utf8 (hb_buffer, 2080 paragraph_text, paragraph_length, 2081 item_offset, item_length); 2082 2083 After this change such clients can simply say: 2084 2085 hb_buffer_set_flags (hb_buffer, 2086 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT); 2087 2088 hb_buffer_add_utf8 (hb_buffer, 2089 paragraph_text, paragraph_length, 2090 item_offset, item_length); 2091 2092 Ie, HarfBuzz itself checks whether the segment is at the beginning/end 2093 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz 2094 continue not setting any flags whatsoever. 2095 2096 Another way to put it is: if there's pre-context text in the buffer, 2097 HarfBuzz ignores the BOT flag. If there's post-context, it ignores 2098 EOT flag. 2099 2100 2101Overview of changes leading to 0.9.33 2102Tuesday, July 22, 2014 2103===================================== 2104 2105- Turn off ARabic 'cswh' feature that was accidentally turned on. 2106- Add HB_TAG_MAX_SIGNED. 2107- Make hb_face_make_immutable() really make face immutable! 2108- Windows build fixes. 2109 2110 2111Overview of changes leading to 0.9.32 2112Thursday, July 17, 2014 2113===================================== 2114 2115- Apply Arabic shaping features in spec order exactly. 2116- Another fix for Mongolian free variation selectors. 2117- For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt' 2118 together. 2119- Minor adjustment to U+FFFD logic. 2120- Fix hb-coretext build. 2121 2122 2123Overview of changes leading to 0.9.31 2124Wednesday, July 16, 2014 2125===================================== 2126 2127- Only accept valid UTF-8/16/32; we missed many cases before. 2128- Better shaping of invalid UTF-8/16/32. Falls back to 2129 U+FFFD REPLACEMENT CHARACTER now. 2130- With all changes in this release, the buffer will contain fully 2131 valid Unicode after hb_buffer_add_utf8/16/32 no matter how 2132 broken the input is. This can be overridden though. See below. 2133- Fix Mongolian Variation Selectors for fonts without GDEF. 2134- Fix minor invalid buffer access. 2135- Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language() 2136 now uses these instead of private tags. 2137- Build fixes. 2138- New API: 2139 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32() 2140 used to do, ie. no validity check on the input at all. add_utf32 2141 now replaces invalid Unicode codepoints with the replacement 2142 character (see below). 2143 * hb_buffer_set_replacement_codepoint() 2144 * hb_buffer_get_replacement_codepoint() 2145 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when 2146 we detected broken input, we replaced that with (hb_codepoint_t)-1. 2147 This has changed to use U+FFFD now, but can be changed using these 2148 new API. 2149 2150 2151Overview of changes leading to 0.9.30 2152Wednesday, July 9, 2014 2153===================================== 2154 2155- Update to Unicode 7.0.0: 2156 * New scripts Manichaean and Psalter Pahlavi are shaped using 2157 Arabic shaper. 2158 * All the other new scripts to through the generic shaper for 2159 now. 2160- Minor Indic improvements. 2161- Fix graphite2 backend cluster mapping [crasher!] 2162- API changes: 2163 * New HB_SCRIPT_* values for Unicode 7.0 scripts. 2164 * New function hb_ot_layout_language_get_required_feature(). 2165- Build fixes. 2166 2167 2168Overview of changes leading to 0.9.29 2169Thursday, May 29, 2014 2170===================================== 2171 2172- Implement cmap in hb-ot-font.h. No variation-selectors yet. 2173- Myanmar: Allow MedialYa+Asat. 2174- Various Indic fixes: 2175 * Support most characters in Extended Devanagary and Vedic 2176 Unicode blocks. 2177 * Allow digits and a some punctuation as consonant placeholders. 2178- Build fixes. 2179 2180 2181Overview of changes leading to 0.9.28 2182Monday, April 28, 2014 2183===================================== 2184 2185- Unbreak old-spec Indic shaping. (bug 76705) 2186- Fix shaping of U+17DD and U+0FC6. 2187- Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default 2188 for shipping libraries. It's an option for further experimentation 2189 right now. When we are sure how to do it properly, we will add 2190 public run-time API for the functionality. 2191- Build fixes. 2192 2193 2194Overview of changes leading to 0.9.27 2195Tuesday, March 18, 2014 2196===================================== 2197 2198- Don't use "register" storage class specifier 2199- Wrap definition of free_langs() with HAVE_ATEXIT 2200- Add coretext_aat shaper and hb_coretext_face_create() constructor 2201- If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks 2202- Add Myanmar test case from OpenType Myanmar spec 2203- Only do fallback Hebrew composition if no GPOS 'mark' available 2204- Allow bootstrapping without gtk-doc 2205- Use AM_MISSING_PROG for ragel and git 2206- Typo in ucdn's Makefile.am 2207- Improve MemoryBarrier() implementation 2208 2209 2210Overview of changes leading to 0.9.26 2211Thursday, January 30, 2014 2212===================================== 2213 2214- Misc fixes. 2215- Fix application of 'rtlm' feature. 2216- Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH. 2217- New header: hb-ot-shape.h 2218- Uniscribe: fix scratch-buffer accounting. 2219- Reorder Tai Tham SAKOT to after tone-marks. 2220- Add Hangul shaper. 2221- New files: 2222 hb-ot-shape-complex-hangul.cc 2223 hb-ot-shape-complex-hebrew.cc 2224 hb-ot-shape-complex-tibetan.cc 2225- Disable 'cswh' feature in Arabic shaper. 2226- Coretext: better handle surrogate pairs. 2227- Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE. 2228 2229 2230Overview of changes leading to 0.9.25 2231Wednesday, December 4, 2013 2232===================================== 2233 2234- Myanmar shaper improvements. 2235- Avoid font fallback in CoreText backend. 2236- Additional OpenType language tag mappiongs. 2237- More aggressive shape-plan caching. 2238- Build with / require automake 1.13. 2239- Build with libtool 2.4.2.418 alpha to support ppc64le. 2240 2241 2242Overview of changes leading to 0.9.24 2243Tuesday, November 13, 2013 2244===================================== 2245 2246- Misc compiler warning fixes with clang. 2247- No functional changes. 2248 2249 2250Overview of changes leading to 0.9.23 2251Monday, October 28, 2013 2252===================================== 2253 2254- "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013. 2255- Fix (Chain)Context recursion with non-monotone lookup positions. 2256- Misc Indic bug fixes. 2257- New Javanese / Buginese shaping, similar to Windows 8.1. 2258 2259 2260Overview of changes leading to 0.9.22 2261Thursday, October 3, 2013 2262===================================== 2263 2264- Fix use-after-end-of-scope in hb_language_from_string(). 2265- Fix hiding of default_ignorables if font doesn't have space glyph. 2266- Protect against out-of-range lookup indices. 2267 2268- API Changes: 2269 2270 * Added hb_ot_layout_table_get_lookup_count() 2271 2272 2273Overview of changes leading to 0.9.21 2274Monday, September 16, 2013 2275===================================== 2276 2277- Rename gobject-introspection library name from harfbuzz to HarfBuzz. 2278- Remove (long disabled) hb-old and hb-icu-le test shapers. 2279- Misc gtk-doc and gobject-introspection annotations. 2280- Misc fixes. 2281- API changes: 2282 2283 * Add HB_SET_VALUE_INVALID 2284 2285Overview of changes leading to 0.9.20 2286Thursday, August 29, 2013 2287===================================== 2288 2289General: 2290- Misc substitute_closure() fixes. 2291- Build fixes. 2292 2293Documentation: 2294- gtk-doc boilerplate integrated. Docs are built now, but 2295 contain no contents. By next release hopefully we have 2296 some content in. Enable using --enable-gtk-doc. 2297 2298GObject and Introspection: 2299- Added harfbuzz-gobject library (hb-gobject.h) that has type 2300 bindings for all HarfBuzz objects and enums. Enable using 2301 --with-gobject. 2302- Added gobject-introspection boilerplate. Nothing useful 2303 right now. Work in progress. Gets enabled automatically if 2304 --with-gobject is used. Override with --disable-introspection. 2305 2306OpenType shaper: 2307- Apply 'mark' in Myanmar shaper. 2308- Don't apply 'dlig' by default. 2309 2310Uniscribe shaper: 2311- Support user features. 2312- Fix loading of fonts that are also installed on the system. 2313- Fix shaping of Arabic Presentation Forms. 2314- Fix build with wide chars. 2315 2316CoreText shaper: 2317- Support user features. 2318 2319Source changes: 2320- hb_face_t code moved to hb-face.h / hb-face.cc. 2321- Added hb-deprecated.h. 2322 2323API changes: 2324- Added HB_DISABLE_DEPRECATED. 2325- Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by 2326 HB_SCRIPT_CANADIAN_SYLLABICS. 2327- Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by 2328 HB_BUFFER_FLAG_DEFAULT. 2329- Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by 2330 HB_BUFFER_SERIALIZE_FLAG_DEFAULT. 2331 2332 2333Overview of changes leading to 0.9.19 2334Tuesday, July 16, 2013 2335===================================== 2336 2337- Build fixes. 2338- Better handling of multiple variation selectors in a row. 2339- Pass on variation selector to GSUB if not consumed by cmap. 2340- Fix undefined memory access. 2341- Add Javanese config to Indic shaper. 2342- Misc bug fixes. 2343 2344Overview of changes leading to 0.9.18 2345Tuesday, May 28, 2013 2346===================================== 2347 2348New build system: 2349 2350- All unneeded code is all disabled by default, 2351 2352- Uniscribe and CoreText shapers can be enabled with their --with options, 2353 2354- icu_le and old shapers cannot be enabled for now, 2355 2356- glib, freetype, and cairo will be detected automatically. 2357 They can be force on/off'ed with their --with options, 2358 2359- icu and graphite2 are default off, can be enabled with their --with 2360 options, 2361 2362Moreover, ICU support is now build into a separate library: 2363libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it. 2364Distros can enable ICU now without every application on earth 2365getting linked to via libharfbuzz.so. 2366 2367For distros I recommend that they make sure they are building --with-glib 2368--with-freetype --with-cairo, --with-icu, and optionally --with-graphite2; 2369And package harfbuzz and harfbuzz-icu separately. 2370 2371 2372Overview of changes leading to 0.9.17 2373Monday, May 20, 2013 2374===================================== 2375 2376- Build fixes. 2377- Fix bug in hb_set_get_min(). 2378- Fix regression with Arabic mark positioning / width-zeroing. 2379 2380Overview of changes leading to 0.9.16 2381Friday, April 19, 2013 2382===================================== 2383 2384- Major speedup in OpenType lookup processing. With the Amiri 2385 Arabic font, this release is over 3x faster than previous 2386 release. All scripts / languages should see this speedup. 2387 2388- New --num-iterations option for hb-shape / hb-view; useful for 2389 profiling. 2390 2391Overview of changes leading to 0.9.15 2392Friday, April 05, 2013 2393===================================== 2394 2395- Build fixes. 2396- Fix crasher in graphite2 shaper. 2397- Fix Arabic mark width zeroing regression. 2398- Don't compose Hangul jamo into Unicode syllables. 2399 2400 2401Overview of changes leading to 0.9.14 2402Thursday, March 21, 2013 2403===================================== 2404 2405- Build fixes. 2406- Fix time-consuming sanitize with malicious fonts. 2407- Implement hb_buffer_deserialize_glyphs() for both json and text. 2408- Do not ignore Hangul filler characters. 2409- Indic fixes: 2410 * Fix Malayalam pre-base reordering interaction with post-forms. 2411 * Further adjust ZWJ handling. Should fix known regressions from 2412 0.9.13. 2413 2414 2415Overview of changes leading to 0.9.13 2416Thursday, February 25, 2013 2417===================================== 2418 2419- Build fixes. 2420- Ngapi HarfBuzz Hackfest in London (February 2013): 2421 * Fixed all known Indic bugs, 2422 * New Win8-style Myanmar shaper, 2423 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue, 2424 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb 2425 matching GSUB/GPOS lookups, 2426 * Fix 'Phags-Pa U+A872 shaping, 2427 * Fix partial disabling of default-on features, 2428 * Allow disabling of TrueType kerning. 2429- Fix possible crasher with broken fonts with overlapping tables. 2430- Removed generated files from git again. So, one needs ragel to 2431 bootstrap from the git tree. 2432 2433API changes: 2434- hb_shape() and related APIs now abort if buffer direction is 2435 HB_DIRECTION_INVALID. Previously, hb_shape() was calling 2436 hb_buffer_guess_segment_properties() on the buffer before 2437 shaping. The heuristics in that function are fragile. If the 2438 user really wants the old behvaior, they can call that function 2439 right before calling hb_shape() to get the old behavior. 2440- hb_blob_create_sub_blob() always creates sub-blob with 2441 HB_MEMORY_MODE_READONLY. See comments for the reason. 2442 2443 2444Overview of changes leading to 0.9.12 2445Thursday, January 18, 2013 2446===================================== 2447 2448- Build fixes for Sun compiler. 2449- Minor bug fix. 2450 2451Overview of changes leading to 0.9.11 2452Thursday, January 10, 2013 2453===================================== 2454 2455- Build fixes. 2456- Fix GPOS mark attachment with null Anchor offsets. 2457- [Indic] Fix old-spec reordering of viramas if sequence ends in one. 2458- Fix multi-threaded shaper data creation crash. 2459- Add atomic ops for Solaris. 2460 2461API changes: 2462- Rename hb_buffer_clear() to hb_buffer_clear_contents(). 2463 2464 2465Overview of changes leading to 0.9.10 2466Thursday, January 3, 2013 2467===================================== 2468 2469- [Indic] Fixed rendering of Malayalam dot-reph 2470- Updated OT language tags. 2471- Updated graphite2 backend. 2472- Improved hb_ot_layout_get_size_params() logic. 2473- Improve hb-shape/hb-view help output. 2474- Fixed hb-set.h implementation to not crash. 2475- Fixed various issues with hb_ot_layout_collect_lookups(). 2476- Various build fixes. 2477 2478New API: 2479 2480hb_graphite2_face_get_gr_face() 2481hb_graphite2_font_get_gr_font() 2482hb_coretext_face_get_cg_font() 2483 2484Modified API: 2485 2486hb_ot_layout_get_size_params() 2487 2488 2489Overview of changes leading to 0.9.9 2490Wednesday, December 5, 2012 2491==================================== 2492 2493- Fix build on Windows. 2494- Minor improvements. 2495 2496 2497Overview of changes leading to 0.9.8 2498Tuesday, December 4, 2012 2499==================================== 2500 2501 2502- Actually implement hb_shape_plan_get_shaper (). 2503- Make UCDB data tables const. 2504- Lots of internal refactoring in OTLayout tables. 2505- Flesh out hb_ot_layout_lookup_collect_glyphs(). 2506 2507New API: 2508 2509hb_ot_layout_collect_lookups() 2510hb_ot_layout_get_size_params() 2511 2512 2513Overview of changes leading to 0.9.7 2514Sunday, November 21, 2012 2515==================================== 2516 2517 2518HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes. 2519 2520- Fix Arabic contextual joining using pre-context text. 2521- Fix Sinhala "split matra" mess. 2522- Fix Khmer shaping with broken fonts. 2523- Implement Thai "PUA" shaping for old fonts. 2524- Do NOT route Kharoshthi script through the Indic shaper. 2525- Disable fallback positioning for Indic and Thai shapers. 2526- Misc fixes. 2527 2528 2529hb-shape / hb-view changes: 2530 2531- Add --text-before and --text-after 2532- Add --bot / --eot / --preserve-default-ignorables 2533- hb-shape --output-format=json 2534 2535 2536New API: 2537 2538hb_buffer_clear() 2539 2540hb_buffer_flags_t 2541 2542HB_BUFFER_FLAGS_DEFAULT 2543HB_BUFFER_FLAG_BOT 2544HB_BUFFER_FLAG_EOT 2545HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES 2546 2547hb_buffer_set_flags() 2548hb_buffer_get_flags() 2549 2550HB_BUFFER_SERIALIZE_FLAGS 2551hb_buffer_serialize_glyphs() 2552hb_buffer_deserialize_glyphs() 2553hb_buffer_serialize_list_formats() 2554 2555hb_set_add_range() 2556hb_set_del_range() 2557hb_set_get_population() 2558hb_set_next_range() 2559 2560hb_face_[sg]et_glyph_count() 2561 2562hb_segment_properties_t 2563HB_SEGMENT_PROPERTIES_DEFAULT 2564hb_segment_properties_equal() 2565hb_segment_properties_hash() 2566 2567hb_buffer_set_segment_properties() 2568hb_buffer_get_segment_properties() 2569 2570hb_ot_layout_glyph_class_t 2571hb_ot_layout_get_glyph_class() 2572hb_ot_layout_get_glyphs_in_class() 2573 2574hb_shape_plan_t 2575hb_shape_plan_create() 2576hb_shape_plan_create_cached() 2577hb_shape_plan_get_empty() 2578hb_shape_plan_reference() 2579hb_shape_plan_destroy() 2580hb_shape_plan_set_user_data() 2581hb_shape_plan_get_user_data() 2582hb_shape_plan_execute() 2583hb_shape_plan_get_shaper() 2584 2585hb_ot_shape_plan_collect_lookups() 2586 2587 2588API changes: 2589 2590- Remove "mask" parameter from hb_buffer_add(). 2591- Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup(). 2592- hb-set.h API const correction. 2593- Renamed hb_set_min/max() to hb_set_get_min/max(). 2594- Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups(). 2595- Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties(). 2596 2597 2598 2599Overview of changes leading to 0.9.6 2600Sunday, November 13, 2012 2601==================================== 2602 2603- Don't clear pre-context text if no new context is provided. 2604- Fix ReverseChainingSubstLookup, which was totally borked. 2605- Adjust output format of hb-shape a bit. 2606- Include config.h.in in-tree. Makes it easier for alternate build systems. 2607- Fix hb_buffer_set_length(buffer, 0) invalid memory allocation. 2608- Use ICU LayoutEngine's C API instead of C++. Avoids much headache. 2609- Drop glyphs for all of Unicode Default_Ignorable characters. 2610- Misc build fixes. 2611 2612Arabic shaper: 2613- Enable 'dlig' and 'mset' features in Arabic shaper. 2614- Implement 'Phags-pa shaping, improve Mongolian. 2615 2616Indic shaper: 2617- Decompose Sinhala split matras the way old HarfBuzz / Pango did. 2618- Initial support for Consonant Medials. 2619- Start adding new-style Myanmar shaping. 2620- Make reph and 'pref' logic introspect the font. 2621- Route Meetei-Mayek through the Indic shaper. 2622- Don't apply 'liga' in Indic shaper. 2623- Improve Malayalam pre-base reordering Ra interaction with Chillus. 2624 2625 2626 2627Overview of changes leading to 0.9.5 2628Sunday, October 14, 2012 2629==================================== 2630 2631- Synthetic-GSUB Arabic fallback shaping. 2632 2633- Misc Indic improvements. 2634 2635- Add build system support for pthread. 2636 2637- Imported UCDN for in-tree Unicode callbacks implementation. 2638 2639- Context-aware Arabic joining. 2640 2641- Misc other fixes. 2642 2643- New API: 2644 2645 hb_feature_to/from-string() 2646 hb_buffer_[sg]et_content_type() 2647 2648 2649 2650Overview of changes leading to 0.9.4 2651Tuesday, Sep 03, 2012 2652==================================== 2653 2654- Indic improvements with old-spec Malayalam. 2655 2656- Better fallback glyph positioning, specially with Thai / Lao marks. 2657 2658- Implement dotted-circle insertion. 2659 2660- Better Arabic fallback shaping / ligation. 2661 2662- Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name. 2663 2664- Misc fixes. 2665 2666 2667 2668Overview of changes leading to 0.9.3 2669Friday, Aug 18, 2012 2670==================================== 2671 2672- Fixed fallback mark positioning for left-to-right text. 2673 2674- Improve mark positioning for the remaining combining classes. 2675 2676- Unbreak Thai and fallback Arabic shaping. 2677 2678- Port Arabic shaper to shape-plan caching. 2679 2680- Use new ICU normalizer functions. 2681 2682 2683 2684Overview of changes leading to 0.9.2 2685Friday, Aug 10, 2012 2686==================================== 2687 2688- Over a thousand commits! This is the first major release of HarfBuzz. 2689 2690- HarfBuzz is feature-complete now! It should be in par, or better, than 2691 both Pango's shapers and old HarfBuzz / Qt shapers. 2692 2693- New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer. 2694 2695- Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic, 2696 Sinhala, N'ko, Mongolian, and Mandaic. 2697 2698- New Thai / Lao shaper. 2699 2700- Tibetan / Hangul support in the generic shaper. 2701 2702- Synthetic GDEF support for fonts without a GDEF table. 2703 2704- Fallback mark positioning for fonts without a GPOS table. 2705 2706- Unicode normalization shaping heuristic during glyph mapping. 2707 2708- New experimental Graphite2 backend. 2709 2710- New Uniscribe backend (primarily for testing). 2711 2712- New CoreText backend (primarily for testing). 2713 2714- Major optimization and speedup. 2715 2716- Test suites and testing infrastructure (work in progress). 2717 2718- Greatly improved hb-view cmdline tool. 2719 2720- hb-shape cmdline tool. 2721 2722- Unicode 6.1 support. 2723 2724Summary of API changes: 2725 2726o Changed API: 2727 2728 - Users are expected to only include main header files now (ie. hb.h, 2729 hb-glib.h, hb-ft.h, ...) 2730 2731 - All struct tag names had their initial underscore removed. 2732 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now. 2733 2734 - All set_user_data() functions now take a "replace" boolean parameter. 2735 2736 - hb_buffer_create() takes zero arguments now. 2737 Use hb_buffer_pre_allocate() to pre-allocate. 2738 2739 - hb_buffer_add_utf*() now accept -1 for length parameters, 2740 meaning "nul-terminated". 2741 2742 - hb_direction_t enum values changed. 2743 2744 - All *_from_string() APIs now take a length parameter to allow for 2745 non-nul-terminated strings. A -1 length means "nul-terminated". 2746 2747 - Typedef for hb_language_t changed. 2748 2749 - hb_get_table_func_t renamed to hb_reference_table_func_t. 2750 2751 - hb_ot_layout_table_choose_script() 2752 2753 - Various renames in hb-unicode.h. 2754 2755o New API: 2756 2757 - hb_buffer_guess_properties() 2758 Automatically called by hb_shape(). 2759 2760 - hb_buffer_normalize_glyphs() 2761 2762 - hb_tag_from_string() 2763 2764 - hb-coretext.h 2765 2766 - hb-uniscribe.h 2767 2768 - hb_face_reference_blob() 2769 - hb_face_[sg]et_index() 2770 - hb_face_set_upem() 2771 2772 - hb_font_get_glyph_name_func_t 2773 hb_font_get_glyph_from_name_func_t 2774 hb_font_funcs_set_glyph_name_func() 2775 hb_font_funcs_set_glyph_from_name_func() 2776 hb_font_get_glyph_name() 2777 hb_font_get_glyph_from_name() 2778 hb_font_glyph_to_string() 2779 hb_font_glyph_from_string() 2780 2781 - hb_font_set_funcs_data() 2782 2783 - hb_ft_font_set_funcs() 2784 - hb_ft_font_get_face() 2785 2786 - hb-gobject.h (work in progress) 2787 2788 - hb_ot_shape_glyphs_closure() 2789 hb_ot_layout_substitute_closure_lookup() 2790 2791 - hb-set.h 2792 2793 - hb_shape_full() 2794 2795 - hb_unicode_combining_class_t 2796 2797 - hb_unicode_compose_func_t 2798 hb_unicode_decompose_func_t 2799 hb_unicode_decompose_compatibility_func_t 2800 hb_unicode_funcs_set_compose_func() 2801 hb_unicode_funcs_set_decompose_func() 2802 hb_unicode_funcs_set_decompose_compatibility_func() 2803 hb_unicode_compose() 2804 hb_unicode_decompose() 2805 hb_unicode_decompose_compatibility() 2806 2807o Removed API: 2808 2809 - hb_ft_get_font_funcs() 2810 2811 - hb_ot_layout_substitute_start() 2812 hb_ot_layout_substitute_lookup() 2813 hb_ot_layout_substitute_finish() 2814 hb_ot_layout_position_start() 2815 hb_ot_layout_position_lookup() 2816 hb_ot_layout_position_finish() 2817 2818 2819 2820Overview of changes leading to 0.6.0 2821Friday, May 27, 2011 2822==================================== 2823 2824- Vertical text support in GPOS 2825- Almost all API entries have unit tests now, under test/ 2826- All thread-safety issues are fixed 2827 2828Summary of API changes follows. 2829 2830 2831* Simple Types API: 2832 2833 o New API: 2834 HB_LANGUAGE_INVALID 2835 hb_language_get_default() 2836 hb_direction_to_string() 2837 hb_direction_from_string() 2838 hb_script_get_horizontal_direction() 2839 HB_UNTAG() 2840 2841 o Renamed API: 2842 hb_category_t renamed to hb_unicode_general_category_t 2843 2844 o Changed API: 2845 hb_language_t is a typed pointers now 2846 2847 o Removed API: 2848 HB_TAG_STR() 2849 2850 2851* Use ISO 15924 tags for hb_script_t: 2852 2853 o New API: 2854 hb_script_from_iso15924_tag() 2855 hb_script_to_iso15924_tag() 2856 hb_script_from_string() 2857 2858 o Changed API: 2859 HB_SCRIPT_* enum members changed value. 2860 2861 2862* Buffer API streamlined: 2863 2864 o New API: 2865 hb_buffer_reset() 2866 hb_buffer_set_length() 2867 hb_buffer_allocation_successful() 2868 2869 o Renamed API: 2870 hb_buffer_ensure() renamed to hb_buffer_pre_allocate() 2871 hb_buffer_add_glyph() renamed to hb_buffer_add() 2872 2873 o Removed API: 2874 hb_buffer_clear() 2875 hb_buffer_clear_positions() 2876 2877 o Changed API: 2878 hb_buffer_get_glyph_infos() takes an out length parameter now 2879 hb_buffer_get_glyph_positions() takes an out length parameter now 2880 2881 2882* Blob API streamlined: 2883 2884 o New API: 2885 hb_blob_get_data() 2886 hb_blob_get_data_writable() 2887 2888 o Renamed API: 2889 hb_blob_create_empty() renamed to hb_blob_get_empty() 2890 2891 o Removed API: 2892 hb_blob_lock() 2893 hb_blob_unlock() 2894 hb_blob_is_writable() 2895 hb_blob_try_writable() 2896 2897 o Changed API: 2898 hb_blob_create() takes user_data before destroy now 2899 2900 2901* Unicode functions API: 2902 2903 o Unicode function vectors can subclass other unicode function vectors now. 2904 Unimplemented callbacks in the subclass automatically chainup to the parent. 2905 2906 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters 2907 take a user_data and its respective destroy callback. 2908 2909 o New API: 2910 hb_unicode_funcs_get_empty() 2911 hb_unicode_funcs_get_default() 2912 hb_unicode_funcs_get_parent() 2913 2914 o Changed API: 2915 hb_unicode_funcs_create() now takes a parent_funcs. 2916 2917 o Removed func getter functions: 2918 hb_unicode_funcs_get_mirroring_func() 2919 hb_unicode_funcs_get_general_category_func() 2920 hb_unicode_funcs_get_script_func() 2921 hb_unicode_funcs_get_combining_class_func() 2922 hb_unicode_funcs_get_eastasian_width_func() 2923 2924 2925* Face API: 2926 2927 o Renamed API: 2928 hb_face_get_table() renamed to hb_face_reference_table() 2929 hb_face_create_for_data() renamed to hb_face_create() 2930 2931 o Changed API: 2932 hb_face_create_for_tables() takes user_data before destroy now 2933 hb_face_reference_table() returns empty blob instead of NULL 2934 hb_get_table_func_t accepts the face as first parameter now 2935 2936* Font API: 2937 2938 o Fonts can subclass other fonts now. Unimplemented callbacks in the 2939 subclass automatically chainup to the parent. When chaining up, 2940 scale is adjusted if the parent font has a different scale. 2941 2942 o All hb_font_funcs_t callbacks take a user_data now. Their setters 2943 take a user_data and its respective destroy callback. 2944 2945 o New API: 2946 hb_font_get_parent() 2947 hb_font_funcs_get_empty() 2948 hb_font_create_sub_font() 2949 2950 o Removed API: 2951 hb_font_funcs_copy() 2952 hb_font_unset_funcs() 2953 2954 o Removed func getter functions: 2955 hb_font_funcs_get_glyph_func() 2956 hb_font_funcs_get_glyph_advance_func() 2957 hb_font_funcs_get_glyph_extents_func() 2958 hb_font_funcs_get_contour_point_func() 2959 hb_font_funcs_get_kerning_func() 2960 2961 o Changed API: 2962 hb_font_create() takes a face and references it now 2963 hb_font_set_funcs() takes user_data before destroy now 2964 hb_font_set_scale() accepts signed integers now 2965 hb_font_get_contour_point_func_t now takes glyph first, then point_index 2966 hb_font_get_glyph_func_t returns a success boolean now 2967 2968 2969* Changed object model: 2970 2971 o All object types have a _get_empty() now: 2972 hb_blob_get_empty() 2973 hb_buffer_get_empty() 2974 hb_face_get_empty() 2975 hb_font_get_empty() 2976 hb_font_funcs_get_empty() 2977 hb_unicode_funcs_get_empty() 2978 2979 o Added _set_user_data() and _get_user_data() for all object types: 2980 hb_blob_get_user_data() 2981 hb_blob_set_user_data() 2982 hb_buffer_get_user_data() 2983 hb_buffer_set_user_data() 2984 hb_face_get_user_data() 2985 hb_face_set_user_data() 2986 hb_font_funcs_get_user_data() 2987 hb_font_funcs_set_user_data() 2988 hb_font_get_user_data() 2989 hb_font_set_user_data() 2990 hb_unicode_funcs_get_user_data() 2991 hb_unicode_funcs_set_user_data() 2992 2993 o Removed the _get_reference_count() from all object types: 2994 hb_blob_get_reference_count() 2995 hb_buffer_get_reference_count() 2996 hb_face_get_reference_count() 2997 hb_font_funcs_get_reference_count() 2998 hb_font_get_reference_count() 2999 hb_unicode_funcs_get_reference_count() 3000 3001 o Added _make_immutable() and _is_immutable() for all object types except for buffer: 3002 hb_blob_make_immutable() 3003 hb_blob_is_immutable() 3004 hb_face_make_immutable() 3005 hb_face_is_immutable() 3006 3007 3008* Changed API for vertical text support 3009 3010 o The following callbacks where removed: 3011 hb_font_get_glyph_advance_func_t 3012 hb_font_get_kerning_func_t 3013 3014 o The following new callbacks added instead: 3015 hb_font_get_glyph_h_advance_func_t 3016 hb_font_get_glyph_v_advance_func_t 3017 hb_font_get_glyph_h_origin_func_t 3018 hb_font_get_glyph_v_origin_func_t 3019 hb_font_get_glyph_h_kerning_func_t 3020 hb_font_get_glyph_v_kerning_func_t 3021 3022 o The following API removed as such: 3023 hb_font_funcs_set_glyph_advance_func() 3024 hb_font_funcs_set_kerning_func() 3025 hb_font_get_glyph_advance() 3026 hb_font_get_kerning() 3027 3028 o New API added instead: 3029 hb_font_funcs_set_glyph_h_advance_func() 3030 hb_font_funcs_set_glyph_v_advance_func() 3031 hb_font_funcs_set_glyph_h_origin_func() 3032 hb_font_funcs_set_glyph_v_origin_func() 3033 hb_font_funcs_set_glyph_h_kerning_func() 3034 hb_font_funcs_set_glyph_v_kerning_func() 3035 hb_font_get_glyph_h_advance() 3036 hb_font_get_glyph_v_advance() 3037 hb_font_get_glyph_h_origin() 3038 hb_font_get_glyph_v_origin() 3039 hb_font_get_glyph_h_kerning() 3040 hb_font_get_glyph_v_kerning() 3041 3042 o The following higher-leve API added for convenience: 3043 hb_font_get_glyph_advance_for_direction() 3044 hb_font_get_glyph_origin_for_direction() 3045 hb_font_add_glyph_origin_for_direction() 3046 hb_font_subtract_glyph_origin_for_direction() 3047 hb_font_get_glyph_kerning_for_direction() 3048 hb_font_get_glyph_extents_for_origin() 3049 hb_font_get_glyph_contour_point_for_origin() 3050 3051 3052* OpenType Layout API: 3053 3054 o New API: 3055 hb_ot_layout_position_start() 3056 hb_ot_layout_substitute_start() 3057 hb_ot_layout_substitute_finish() 3058 3059 3060* Glue code: 3061 3062 o New API: 3063 hb_glib_script_to_script() 3064 hb_glib_script_from_script() 3065 hb_icu_script_to_script() 3066 hb_icu_script_from_script() 3067 3068 3069* Version API added: 3070 3071 o New API: 3072 HB_VERSION_MAJOR 3073 HB_VERSION_MINOR 3074 HB_VERSION_MICRO 3075 HB_VERSION_STRING 3076 HB_VERSION_CHECK() 3077 hb_version() 3078 hb_version_string() 3079 hb_version_check() 3080 3081 3082