1 Overview of changes leading to 2.6.4
2 Monday, October 29, 2019
3 ====================================
8 Overview of changes leading to 2.6.3
9 Monday, October 28, 2019
10 ====================================
11 - Misc small fixes, mostly to build-related issues.
13 +hb_font_get_nominal_glyphs()
16 Overview of changes leading to 2.6.2
17 Monday, September 30, 2019
18 ====================================
19 - Misc small fixes, mostly to build-related issues.
22 Overview of changes leading to 2.6.1
23 Thursday, August 22, 2019
24 ====================================
25 - Fix regression with hb_font_create_sub_font scaling introduced in 2.6.0.
26 - Change interpretation of font PTEM size / CoreText font size handling.
27 See https://github.com/harfbuzz/harfbuzz/pull/1484
28 - hb-ot-font: Prefer symbol cmap subtable if present.
29 - Apply 'dist'/'abvm'/'blwm' features to all scripts.
30 - Drop experimental DirectWrite API.
33 Overview of changes leading to 2.6.0
34 Tuesday, August 13, 2019
35 ====================================
36 - New OpenType metrics, baseline, and metadata table access APIs.
37 - New API to set font variations to a named-instance.
38 - New hb-gdi.h header and API for creating hb_face_t from HFONT.
39 - Amalgam: Provide a single-file harfbuzz.cc file for easier alternate building.
40 - More size-reduction configurable options, enabled by HB_TINY.
42 +hb_font_set_var_named_instance()
44 +hb_ot_layout_baseline_tag_t
45 +hb_ot_layout_get_baseline()
47 +hb_ot_meta_get_entry_tags()
48 +hb_ot_meta_reference_entry()
50 +hb_ot_metrics_get_position()
51 +hb_ot_metrics_get_variation()
52 +hb_ot_metrics_get_x_variation()
53 +hb_ot_metrics_get_y_variation()
56 Overview of changes leading to 2.5.3
57 Wednesday, June 26, 2019
58 ====================================
59 - Fix UCD script data for Unicode 10+ scripts. This was broken since 2.5.0.
60 - More optimizations for HB_TINY.
63 Overview of changes leading to 2.5.2
64 Thursday, June 20, 2019
65 ====================================
66 - More hb-config.hh facilities to shrink library size, namely when built as
68 - New documentation of custom configurations in CONFIG.md.
69 - Fix build on gcc 4.8. That's supported again.
70 - Universal Shaping Engine improvements thanks to David Corbett.
71 - API Changes: Undeprecate some horizontal-kerning API and re-enable in hb-ft,
72 such that Type1 fonts will continue kerning.
75 Overview of changes leading to 2.5.1
77 ====================================
78 - Fix build with various versions of Visual Studio.
79 - Improved documentation, thanks to Nathan Willis.
80 - Bugfix in subsetting glyf table.
81 - Improved scripts for cross-compiling for Windows using mingw.
82 - Rename HB_MATH_GLYPH_PART_FLAG_EXTENDER to HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER.
83 A deprecated macro is added for backwards-compatibility.
86 Overview of changes leading to 2.5.0
88 ====================================
89 - This release does not include much functional changes, but includes major internal
90 code-base changes. We now require C++11. Support for gcc 4.8 and earlier has been
92 - New hb-config.hh facility for compiling smaller library for embedded and web usecases.
93 - New Unicode Character Databse implementation that is half the size of previously-used
95 - Subsetter improvements.
96 - Improved documentation, thanks to Nathan Willis.
100 Overview of changes leading to 2.4.0
101 Monday, March 25, 2019
102 ====================================
105 - Subsetter improvements.
107 HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE
108 hb_directwrite_face_create()
111 Overview of changes leading to 2.3.1
112 Wednesday, January 30, 2019
113 ====================================
115 - Misc internal housekeeping cleanup.
118 Overview of changes leading to 2.3.0
119 Thursday, December 20, 2018
120 ====================================
121 - Fix regression on big-endian architectures. Ouch!
122 - Misc bug and build fixes.
123 - Fix subsetting of simple GSUB/GDEF.
124 - Merge CFF / CFF2 support contributed by Adobe. This mostly involves
125 the subsetter, but also get_glyph_extents on CFF fonts.
128 +hb_aat_layout_has_substitution()
129 +hb_aat_layout_has_positioning()
130 +hb_aat_layout_has_tracking()
133 Overview of changes leading to 2.2.0
134 Thursday, November 29, 2018
135 ====================================
136 - Misc shaping bug fixes.
137 - Add font variations named-instance API.
138 - Deprecate font variations axis enumeration API and add replacement.
139 - AAT shaping improvements:
140 o Fixed 'kern' table Format 2 implementation.
141 o Implement 'feat' table API for feature detection.
142 o Blacklist 'GSUB' table of fonts from 'MUTF' foundry that also have 'morx'.
145 +hb_aat_layout_feature_type_t
146 +hb_aat_layout_feature_selector_t
147 +hb_aat_layout_get_feature_types()
148 +hb_aat_layout_feature_type_get_name_id
149 +hb_aat_layout_feature_selector_info_t
150 +HB_AAT_LAYOUT_NO_SELECTOR_INDEX
151 +hb_aat_layout_feature_type_get_selector_infos()
152 +hb_ot_var_axis_flags_t
153 +hb_ot_var_axis_info_t
154 +hb_ot_var_get_axis_infos()
155 +hb_ot_var_find_axis_info()
156 +hb_ot_var_get_named_instance_count()
157 +hb_ot_var_named_instance_get_subfamily_name_id()
158 +hb_ot_var_named_instance_get_postscript_name_id()
159 +hb_ot_var_named_instance_get_design_coords()
162 +HB_OT_VAR_NO_AXIS_INDEX
164 +hb_ot_var_get_axes()
165 +hb_ot_var_find_axis()
168 Overview of changes leading to 2.1.3
169 Friday, November 16, 2018
170 ====================================
171 - Fix AAT 'mort' shaping, which was broken in 2.1.2
174 Overview of changes leading to 2.1.2
175 Friday, November 16, 2018
176 ====================================
177 - Various internal changes.
178 - AAT shaping improvements:
179 o Implement kern table Format 1 state-machine-based kerning.
180 o Implement cross-stream kerning (cursive positioning, etc).
181 o Ignore emptyish GSUB tables (zero scripts) if morx present.
182 o Don't apply GPOS if morx is being applied. Matches Apple.
185 -Overview of changes leading to 2.1.1
186 Monday, November 5, 2018
187 ====================================
189 o Implement 'mort' table.
190 o Implement 'kern' subtables Format 1 and Format 3.
193 Overview of changes leading to 2.1.0
194 Tuesday, October 30, 2018
195 ====================================
196 - AAT shaping improvements:
197 o Allow user controlling AAT features, for whole buffer only currently.
198 o Several 'morx' fixes.
199 o Implement tuple-kerns in 'kerx'; Fixes kerning with Apple default
201 - Support for color fonts:
202 o COLR/CPAL API to fetch color layers.
203 o SVG table to fetch SVG documents.
204 o CBDT/sbix API to fetch PNG images.
205 - New 'name' table API.
206 - hb-ot-font now uses 'VORG' table to correctly position CFF glyphs
208 - Various fuzzer-found bug fixes.
212 A type and a macro added in 2.0.0 were renamed:
214 hb_name_id_t -> hb_ot_name_id_t
215 HB_NAME_ID_INVALID -> HB_OT_NAME_ID_INVALID
221 +hb_color_get_alpha()
223 +hb_color_get_green()
225 +hb_ot_color_has_palettes()
226 +hb_ot_color_palette_get_count()
227 +hb_ot_color_palette_get_name_id()
228 +hb_ot_color_palette_color_get_name_id()
229 +hb_ot_color_palette_flags_t
230 +hb_ot_color_palette_get_flags()
231 +hb_ot_color_palette_get_colors()
232 +hb_ot_color_has_layers()
234 +hb_ot_color_glyph_get_layers()
235 +hb_ot_color_has_svg()
236 +hb_ot_color_glyph_reference_svg()
237 +hb_ot_color_has_png()
238 +hb_ot_color_glyph_reference_png()
241 +HB_OT_NAME_ID_INVALID
242 +HB_OT_NAME_ID_COPYRIGHT
243 +HB_OT_NAME_ID_FONT_FAMILY
244 +HB_OT_NAME_ID_FONT_SUBFAMILY
245 +HB_OT_NAME_ID_UNIQUE_ID
246 +HB_OT_NAME_ID_FULL_NAME
247 +HB_OT_NAME_ID_VERSION_STRING
248 +HB_OT_NAME_ID_POSTSCRIPT_NAME
249 +HB_OT_NAME_ID_TRADEMARK
250 +HB_OT_NAME_ID_MANUFACTURER
251 +HB_OT_NAME_ID_DESIGNER
252 +HB_OT_NAME_ID_DESCRIPTION
253 +HB_OT_NAME_ID_VENDOR_URL
254 +HB_OT_NAME_ID_DESIGNER_URL
255 +HB_OT_NAME_ID_LICENSE
256 +HB_OT_NAME_ID_LICENSE_URL
257 +HB_OT_NAME_ID_TYPOGRAPHIC_FAMILY
258 +HB_OT_NAME_ID_TYPOGRAPHIC_SUBFAMILY
259 +HB_OT_NAME_ID_MAC_FULL_NAME
260 +HB_OT_NAME_ID_SAMPLE_TEXT
261 +HB_OT_NAME_ID_CID_FINDFONT_NAME
262 +HB_OT_NAME_ID_WWS_FAMILY
263 +HB_OT_NAME_ID_WWS_SUBFAMILY
264 +HB_OT_NAME_ID_LIGHT_BACKGROUND
265 +HB_OT_NAME_ID_DARK_BACKGROUND
266 +HB_OT_NAME_ID_VARIATIONS_PS_PREFIX
268 +hb_ot_name_list_names()
269 +hb_ot_name_get_utf8()
270 +hb_ot_name_get_utf16()
271 +hb_ot_name_get_utf32()
274 Overview of changes leading to 2.0.2
275 Saturday, October 20, 2018
276 ====================================
277 - Fix two minor memory access issues in AAT tables.
280 Overview of changes leading to 2.0.1
281 Friday, October 19, 2018
282 ====================================
283 - Fix hb-version.h reported release version that went wrong (1.8.0)
284 with previous release.
285 - Fix extrapolation in 'trak' table.
286 - Fix hb-font infinite-recursion issue with some font funcs and
288 - Implement variation-kerning format in kerx table, although without
290 - Fix return value of hb_map_is_empty().
293 Overview of changes leading to 2.0.0
294 Thursday, October 18, 2018
295 ====================================
296 - Added AAT shaping support (morx/kerx/trak).
297 Automatically used if GSUB/GPOS are not available respectively.
298 Set HB_OPTIONS=aat env var to have morx/kerx preferred over
300 - Apply TrueType kern table internally, instead of relying on
302 - Khmer shaper significantly rewritten to better match Uniscribe.
303 - Indic3 tags ('dev3', etc) are passed to USE shaper.
304 - .dfont Mac font containers implemented.
305 - Script- and language-mapping revamped to better use BCP 47.
306 - Misc USE and Indic fixes.
307 - Misc everything fixes.
308 - Too many things to list. Biggest release since 0.9.1, with
309 over 500 commits in just over 5 weeks! Didn't intend it to
310 be a big release. Just happened to become.
311 - hb-ft now locks underlying FT_Face during use.
315 - Newly-created hb_font_t's now have our internal "hb-ot-font"
316 callbacks set on them, so they should work out of the box
317 without any callbacks set. If callbacks are set, everything
318 is back to what it was before, the fallback callbacks are
319 null. If you to get the internal implementation modified,
322 - New hb_font_funcs_set_nominal_glyphs_func() allows speeding
323 up character to glyph mapping.
326 +HB_FEATURE_GLOBAL_START
327 +HB_FEATURE_GLOBAL_END
328 +hb_buffer_set_invisible_glyph()
329 +hb_buffer_get_invisible_glyph()
330 +hb_font_funcs_set_nominal_glyphs_func()
331 +hb_ot_layout_table_select_script()
332 +hb_ot_layout_script_select_language()
333 +hb_ot_layout_feature_get_name_ids()
334 +hb_ot_layout_feature_get_characters()
337 +HB_OT_MAX_TAGS_PER_SCRIPT
338 +hb_ot_tags_from_script_and_language()
339 +hb_ot_tags_to_script_and_language()
342 -hb_font_funcs_set_glyph_func()
343 -hb_unicode_eastasian_width_func_t
344 -hb_unicode_funcs_set_eastasian_width_func()
345 -hb_unicode_eastasian_width()
346 -hb_unicode_decompose_compatibility_func_t
347 -HB_UNICODE_MAX_DECOMPOSITION_LEN
348 -hb_unicode_funcs_set_decompose_compatibility_func()
349 -hb_unicode_decompose_compatibility()
350 -hb_font_funcs_set_glyph_h_kerning_func()
351 -hb_font_funcs_set_glyph_v_kerning_func()
352 -hb_font_get_glyph_h_kerning()
353 -hb_font_get_glyph_v_kerning()
354 -hb_font_get_glyph_kerning_for_direction()
355 -hb_ot_layout_table_choose_script()
356 -hb_ot_layout_script_find_language()
357 -hb_ot_tags_from_script()
358 -hb_ot_tag_from_language()
361 Overview of changes leading to 1.9.0
362 Monday, September 10, 2018
363 ====================================
364 - Added 'cmap' API to hb_face_t.
366 - hb-ot-font re-creation should be much leaner now, as the
367 font tables it uses are cached on hb_face_t now.
368 - Internal source header file name changes:
369 hb-*-private.hh is renamed to hb-*.hh.
373 +hb_face_collect_unicodes()
374 +hb_face_collect_variation_selectors()
375 +hb_face_collect_variation_unicodes()
376 +hb_face_builder_create()
377 +hb_face_builder_add_table()
380 Overview of changes leading to 1.8.8
381 Tuesday, August 14, 2018
382 ====================================
383 - Fix hb-icu crash on architectures where compare_exchange_weak() can
384 fail falsely. This bug was introduced in 1.8.4.
385 https://bugs.chromium.org/p/chromium/issues/detail?id=873568
386 - More internal refactoring of atomic operations and singletons.
388 The following functions do NOT reference their return value before
390 * hb_unicode_funcs_get_default()
391 * hb_glib_get_unicode_funcs()
392 * hb_icu_get_unicode_funcs()
393 This is consistent with their naming ("get", instead of "reference")
394 as well as how they are used in the wild (ie. no one calls destroy()
395 on their return value.)
398 Overview of changes leading to 1.8.7
399 Wednesday, August 8, 2018
400 ====================================
401 - Fix assertion failure with GDEF-blacklisted fonts.
404 Overview of changes leading to 1.8.6
405 Tuesday, August 7, 2018
406 ====================================
407 - Internal code shuffling.
408 - New API to speed up getting advance widths for implementations
409 that have heavy overhead in get_h_advance callback:
410 +hb_font_funcs_set_glyph_h_advances_func
411 +hb_font_funcs_set_glyph_v_advances_func
412 +hb_font_get_glyph_advances_for_direction
413 +hb_font_get_glyph_h_advances
414 +hb_font_get_glyph_h_advances_func_t
415 +hb_font_get_glyph_v_advances
416 +hb_font_get_glyph_v_advances_func_t
419 Overview of changes leading to 1.8.5
420 Wednesday, August 1, 2018
421 ====================================
422 - Major Khmer shaper improvements to better match Microsoft.
424 - Internal improvements to atomic operations.
427 Overview of changes leading to 1.8.4
428 Tuesday, July 17, 2018
429 ====================================
430 - Fix build on non-C++11.
431 - Use C++-style GCC atomics and C++11 atomics.
434 Overview of changes leading to 1.8.3
435 Wednesday, July 11, 2018
436 ====================================
437 - A couple of Indic / USE bug fixes.
438 - Disable vectorization, as it was causing unaligned access bus error on
439 certain 32bit architectures.
442 Overview of changes leading to 1.8.2
443 Tuesday, July 3, 2018
444 ====================================
445 - Fix infinite loop in Khmer shaper.
446 - Improve hb_blob_create_from_file() for streams.
449 Overview of changes leading to 1.8.1
450 Tuesday, June 12, 2018
451 ====================================
452 - Fix hb-version.h file generation; last two releases went out with wrong ones.
453 - Add correctness bug in hb_set_t operations, introduced in 1.7.7.
454 - Remove HB_SUBSET_BUILTIN build option. Not necessary.
457 Overview of changes leading to 1.8.0
458 Tuesday, June 5, 2018
459 ====================================
460 - Update to Unicode 11.0.0.
463 Overview of changes leading to 1.7.7
464 Tuesday, June 5, 2018
465 ====================================
466 - Lots of internal changes, but not yet exposed externally.
467 - All HarfBuzz objects are significantly smaller in size now.
468 - Sinhala: Position repha on top of post-consonant, not base.
469 This better matches Windows 10 behavior, which was changed
470 from previous Windows versions.
472 o New cpp macro HB_NO_ATEXIT
473 o New cpp macro HB_SUBSET_BUILTIN
474 - Significant libharfbuzz-subset changes. API subject to change.
475 - New API in libharfbuzz:
477 +hb_blob_create_from_file()
480 A hashmap implementation:
482 +HB_MAP_VALUE_INVALID
488 +hb_map_set_user_data()
489 +hb_map_get_user_data()
490 +hb_map_allocation_successful()
493 +hb_map_get_population()
500 Overview of changes leading to 1.7.6
501 Wednesday, March 7, 2018
502 ====================================
504 - Fix to hb_set_t binary operations. Ouch.
505 - New experimental harfbuzz-subset library. All of hb-subset.h
506 is experimental right now and API WILL change.
509 hb_blob_copy_writable_or_fail()
512 hb_set_previous_range()
515 Overview of changes leading to 1.7.5
516 Tuesday, January 30, 2018
517 ====================================
519 - Separate Khmer shaper from Indic.
520 - First stab at AAT morx. Not hooked up.
524 Overview of changes leading to 1.7.4
525 Wednesday, December 20, 2017
526 ====================================
528 - Fix collect_glyphs() regression caused by hb_set_t changes.
531 Overview of changes leading to 1.7.3
532 Monday, December 18, 2017
533 ====================================
535 - hb_set_t performance tuning and optimizations.
536 - Speed up collect_glyphs() and reject garbage data.
537 - In hb_coretext_font_create() set font point-size (ptem).
541 Overview of changes leading to 1.7.2
542 Monday, December 4, 2017
543 ====================================
545 - Optimize hb_set_add_range().
548 hb_coretext_font_create()
551 Overview of changes leading to 1.7.1
552 Tuesday, November 14, 2017
553 ====================================
555 - Fix atexit object destruction regression.
556 - Fix minor integer-overflow.
559 Overview of changes leading to 1.7.0
560 Monday, November 13, 2017
561 ====================================
564 - Implement kerning and glyph names in hb-ot-font.
565 - Various DSO optimization re .data and .bss sizes.
566 - Make C++11 optional; build fixes.
567 - Mark all other backends "unsafe-to-break".
571 Overview of changes leading to 1.6.3
572 Thursday, October 26th, 2017
573 ====================================
575 - Fix hb_set_t some more. Should be solid now.
576 - Implement get_glyph_name() for hb-ot-font.
580 Overview of changes leading to 1.6.2
581 Monday, October 23nd, 2017
582 ====================================
584 - Yesterday's release had a bad crasher; don't use it. That's what
585 happens when one works on Sunday...
586 https://github.com/harfbuzz/harfbuzz/issues/578
587 - Build fixes for FreeBSD and Chrome Android.
590 Overview of changes leading to 1.6.1
591 Sunday, October 22nd, 2017
592 ====================================
594 - Don't skip over COMBINING GRAPHEME JOINER when ligating, etc.
595 To be refined: https://github.com/harfbuzz/harfbuzz/issues/554
596 - Faster hb_set_t implementation.
597 - Don't use deprecated ICU API.
598 - Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0
603 Overview of changes leading to 1.6.0
604 Friday, October the 13th, 2017
605 ====================================
607 - Update to Unicode 10.
609 - Various Indic and Universal Shaping Engine fixes as a result of
610 HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at
611 the Igalia offices in A Coruña, Spain. Thanks Igalia for having
614 - Implement Unicode Arabic Mark Ordering Algorithm UTR#53.
616 - Implement optical sizing / tracking in CoreText backend, using
617 new API hb_font_set_ptem().
619 - Allow notifying hb_font_t that underlying FT_Face changed sizing,
620 using new API hb_ft_font_changed().
622 - More Graphite backend RTL fixes.
624 - Fix caching of variable font shaping plans.
626 - hb-view / hb-shape now accept following new arguments:
628 o --unicodes: takes a list of hex numbers that represent Unicode
632 +hb_face_get_table_tags()
635 +hb_ft_font_changed()
638 Overview of changes leading to 1.5.1
639 Tuesday, September 5, 2017
640 ====================================
642 - Fix "unsafe-to-break" in fallback shaping and other corner cases.
643 All our tests pass with --verify now, meaning unsafe-to-break API
645 - Add --unicodes to hb-view / hb-shape.
646 - [indic] Treat Consonant_With_Stacker as consonant. This will need
648 - hb_buffer_diff() tweaks.
651 Overview of changes leading to 1.5.0
652 Wednesday, August 23, 2017
653 ====================================
655 - Misc new API, for appending a buffer to another, and for comparing
656 contents of two buffers for types of differences.
658 - New "unsafe-to-break" API. Can be used to speed up reshaping
659 in line-breaking situations. Essentially, after shaping, it returns
660 positions in the input string (some of the cluster boundaries) that
661 are "safe to break" in that if the text is segmented at that position
662 and two sides reshaped and concatenated, the shaping result is
663 exactly the same as shaping the text in one piece.
665 hb-view and hb-shape and hb-shape now take --verify, which verifies
668 Some corner cases of the implementation are still not quite working.
669 Those will be fixed in subsequent releases.
676 HB_GLYPH_FLAG_UNSAFE_TO_BREAK
677 HB_GLYPH_FLAG_DEFINED
678 hb_glyph_info_get_glyph_flags()
680 HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS
682 hb_buffer_diff_flags_t
683 HB_BUFFER_DIFF_FLAG_EQUAL
684 HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH
685 HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH
686 HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT
687 HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT
688 HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH
689 HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH
690 HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH
691 HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH
695 Overview of changes leading to 1.4.8
696 Tuesday, August 8, 2017
697 ====================================
699 - Major fix to avar table handling.
700 - Rename hb-shape --show-message to --trace.
704 Overview of changes leading to 1.4.7
705 Tuesday, July 18, 2017
706 ====================================
708 - Multiple Indic, Tibetan, and Cham fixes.
709 - CoreText: Allow disabling kerning.
710 - Adjust Arabic feature order again.
714 Overview of changes leading to 1.4.6
715 Sunday, April 23, 2017
716 ====================================
718 - Graphite2: Fix RTL positioning issue.
719 - Backlist GDEF of more versions of Padauk and Tahoma.
720 - New, experimental, cmake alternative build system.
723 Overview of changes leading to 1.4.5
724 Friday, March 10, 2017
725 ====================================
727 - Revert "Fix Context lookup application when moving back after a glyph..."
728 This introduced memory access problems. To be fixed properly soon.
731 Overview of changes leading to 1.4.4
732 Sunday, March 5, 2017
733 ====================================
735 - Fix Context lookup application when moving back after a glyph deletion.
736 - Fix buffer-overrun in Bengali.
739 Overview of changes leading to 1.4.3
740 Saturday, February 25, 2017
741 ====================================
743 - Route Adlam script to Arabic shaper.
748 hb_graphite2_font_get_gr_font()
751 Overview of changes leading to 1.4.2
752 Monday, January 23, 2017
753 ====================================
755 - Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR.
756 - hb-shape and hb-view now accept --variations.
760 hb_variation_from_string()
761 hb_variation_to_string()
763 hb_font_set_variations()
764 hb_font_set_var_coords_design()
765 hb_font_get_var_coords_normalized()
770 hb_ot_var_get_axis_count()
772 hb_ot_var_find_axis()
773 hb_ot_var_normalize_variations()
774 hb_ot_var_normalize_coords()
776 - MVAR to be implemented later. Access to named instances to be
777 implemented later as well.
782 Overview of changes leading to 1.4.1
783 Thursday, January 5, 2017
784 ====================================
786 - Always build and use UCDN for Unicode data by default.
787 Reduces dependence on version of Unicode data in glib,
788 specially in the Windows bundles we are shipping, which
792 Overview of changes leading to 1.4.0
793 Thursday, January 5, 2017
794 ====================================
796 - Merged "OpenType GX" branch which adds core of support for
797 OpenType 1.8 Font Variations. To that extent, the relevant
801 hb_font_set_var_coords_normalized()
806 HB_OT_LAYOUT_NO_VARIATIONS_INDEX
807 hb_ot_layout_table_find_feature_variations()
808 hb_ot_layout_feature_with_variations_get_lookups()
809 hb_shape_plan_create2()
810 hb_shape_plan_create_cached2()
812 Currently variations in GSUB/GPOS/GDEF are fully supported,
813 and no other tables are supported. In particular, fvar/avar
814 are NOT supported, hence the hb_font_set_var_coords_normalized()
815 taking normalized coordinates. API to take design coordinates
816 will be added in the future.
818 HVAR/VVAR/MVAR support will also be added to hb-ot-font in the
821 - Fix regression in GDEF glyph class processing.
822 - Add decompositions for Chakma, Limbu, and Balinese in USE shaper.
826 Overview of changes leading to 1.3.4
827 Monday, December 5, 2016
828 ====================================
830 - Fix vertical glyph origin in hb-ot-font.
831 - Implement CBDT/CBLC color font glyph extents in hb-ot-font.
834 Overview of changes leading to 1.3.3
835 Wednesday, September 28, 2016
836 ====================================
838 - Implement parsing of OpenType MATH table.
842 hb_ot_math_constant_t
844 hb_ot_math_glyph_variant_t
845 hb_ot_math_glyph_part_flags_t
846 hb_ot_math_glyph_part_t
848 hb_ot_math_get_constant
849 hb_ot_math_get_glyph_italics_correction
850 hb_ot_math_get_glyph_top_accent_attachment
851 hb_ot_math_get_glyph_kerning
852 hb_ot_math_is_glyph_extended_shape
853 hb_ot_math_get_glyph_variants
854 hb_ot_math_get_min_connector_overlap
855 hb_ot_math_get_glyph_assembly
858 Overview of changes leading to 1.3.2
859 Wednesday, September 27, 2016
860 ====================================
862 - Fix build of hb-coretext on older OS X versions.
865 Overview of changes leading to 1.3.1
866 Wednesday, September 7, 2016
867 ====================================
869 - Blacklist bad GDEF of more fonts (Padauk).
870 - More CoreText backend crash fixes with OS X 10.9.5.
874 Overview of changes leading to 1.3.0
875 Thursday, July 21, 2016
876 ====================================
878 - Update to Unicode 9.0.0
879 - Move Javanese from Indic shaper to Universal Shaping Engine.
880 - Allow MultipleSubst to delete a glyph (matching Windows engine).
881 - Update Universal Shaping Engine to latest draft from Microsoft.
882 - DirectWrite backend improvements. Note: this backend is for testing ONLY.
883 - CoreText backend improvements with unreachable fonts.
884 - Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font.
885 - Blacklist bad GDEF of more fonts (Tahoma & others).
889 Overview of changes leading to 1.2.7
891 ====================================
893 - Blacklist another version of Times New Roman (Bold) Italic from Windows 7.
894 - Fix Mongolian Free Variation Selectors shaping with certain fonts.
895 - Fix Tibetan shorthand contractions shaping.
896 - Improved list of language tag mappings.
897 - Unbreak build on Windows CE.
898 - Make 'glyf' table loading lazy in hb-ot-font.
901 Overview of changes leading to 1.2.6
902 Friday, April 8, 2016
903 ====================================
905 - Blacklist GDEF table of another set of Times New Roman (Bold) Italic.
906 - DirectWrite backend improvements. Note: DirectWrite backend is
907 exclusively for our internal testing and should NOT be used in any
908 production system whatsoever.
911 Overview of changes leading to 1.2.5
912 Monday, April 4, 2016
913 ====================================
915 - Fix GDEF mark-filtering-set, which was broken in 1.2.3.
918 Overview of changes leading to 1.2.4
919 Thursday, March 17, 2016
920 ====================================
922 - Synthesize GDEF glyph class for any glyph that does not have one in GDEF.
923 I really hope we don't discover broken fonts that shape badly with this
925 - Misc build and other minor fixes.
927 - Added HB_NDEBUG. It's fine for production systems to define this to
928 disable high-overhead debugging checks. However, I also reduced the
929 overhead of those checks, so it's a non-issue right now. You can
930 forget it. Just not defining anything at all is fine.
933 Overview of changes leading to 1.2.3
934 Thursday, February 25, 2016
935 ====================================
937 - Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic,
938 due to bug in glyph class of ASCII double-quote character. This should
939 address "regression" introduced in 1.2.0 when we switched mark zeroing
940 in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE.
941 This fourth release in a week should finally stablize things...
943 - hb-ot-font's get_glyph() implementation saw some optimizations. Though,
944 might be really hard to measure in real-world situations.
946 - Also, two rather small API changes:
948 We now disable some time-consuming internal bookkeeping if built with NDEBUG
949 defined. This is a first time that we use NDEBUG to disable debug code. If
950 there exist production systems that do NOT want to enable NDEBUG, please let
951 me know and I'll add HB_NDEBUG.
953 Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph()
956 - hb_font_get_nominal_glyph_func_t
957 - hb_font_get_variation_glyph_func_t
958 - hb_font_funcs_set_nominal_glyph_func()
959 - hb_font_funcs_set_variation_glyph_func()
960 - hb_font_get_nominal_glyph()
961 - hb_font_get_variation_glyph()
964 - hb_font_get_glyph_func_t
965 - hb_font_funcs_set_glyph_func()
967 Clients that implement their own font-funcs are encouraged to replace
968 their get_glyph() implementation with a get_nominal_glyph() and
969 get_variation_glyph() pair. The variation version can assume that
970 variation_selector argument is not zero. Old (deprecated) functions
971 will continue working indefinitely using internal gymnastics; it is
972 just more efficient to use the new functions.
975 Overview of changes leading to 1.2.2
976 Wednesday, February 24, 2016
977 ====================================
979 - Fix regression with mark positioning with fonts that have
980 non-zero mark advances. This was introduced in 1.2.0 while
981 trying to make mark and cursive attachments to work together.
982 I have partially reverted that, so this version is much more
983 like what we had before. All clients who updated to 1.2.0
984 should update to this version.
987 Overview of changes leading to 1.2.1
988 Tuesday, February 23, 2016
989 ====================================
991 - CoreText: Fix bug with wrong scale if font scale was changed later.
992 https://github.com/libass/libass/issues/212
993 - CoreText: Drastically speed up font initialization.
994 - CoreText: Fix tiny leak.
995 - Group ZWJ/ZWNJ with previous syllable under cluster-level=0.
996 https://github.com/harfbuzz/harfbuzz/issues/217
997 - Add test/shaping/README.md about how to add tests to the suite.
1000 Overview of changes leading to 1.2.0
1001 Friday, February 19, 2016
1002 ====================================
1004 - Fix various issues (hangs mostly) in case of memory allocation failure.
1005 - Change mark zeroing types of most shapers from BY_UNICODE_LATE to
1006 BY_GDEF_LATE. This seems to be what Uniscribe does.
1007 - Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's
1009 - Allow GPOS cursive connection on marks, and fix the interaction with
1010 mark attachment. This work resulted in some changes to how mark
1011 attachments work. See:
1012 https://github.com/harfbuzz/harfbuzz/issues/211
1013 https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2
1014 - Graphite2 shaper: improved negative advance handling (eg. Nastaliq).
1015 - Add nmake-based build system for Windows.
1017 - Misc. improvements.
1020 Overview of changes leading to 1.1.3
1021 Monday, January 11, 2016
1022 ====================================
1024 - Ported Indic shaper to Unicode 8.0 data.
1025 - Universal Shaping Engine fixes.
1026 - Speed up CoreText shaper when font fallback happens in CoreText.
1027 - Documentation improvements, thanks to Khaled Hosny.
1028 - Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi.
1034 hb_font_get_font_extents_func_t
1035 hb_font_get_font_h_extents_func_t
1036 hb_font_get_font_v_extents_func_t
1037 hb_font_funcs_set_font_h_extents_func
1038 hb_font_funcs_set_font_v_extents_func
1039 hb_font_get_h_extents
1040 hb_font_get_v_extents
1041 hb_font_get_extents_for_direction
1043 * Buffer message (aka debug):
1044 hb_buffer_message_func_t
1045 hb_buffer_set_message_func()
1046 Actual message protocol to be fleshed out later.
1049 Overview of changes leading to 1.1.2
1050 Wednesday, November 26, 2015
1051 ====================================
1053 - Fix badly-broken fallback shaper that affected terminology.
1054 https://github.com/harfbuzz/harfbuzz/issues/187
1055 - Fix y_scaling in Graphite shaper.
1057 * An unset glyph_h_origin() function in font-funcs now (sensibly)
1058 implies horizontal origin at 0,0. Ie, the nil callback returns
1059 true instead of false. As such, implementations that have a
1060 glyph_h_origin() that simply returns true, can remove that function
1061 with HarfBuzz >= 1.1.2. This results in a tiny speedup.
1064 Overview of changes leading to 1.1.1
1065 Wednesday, November 24, 2015
1066 ====================================
1068 - Build fixes, specially for hb-coretext.
1071 Overview of changes leading to 1.1.0
1072 Wednesday, November 18, 2015
1073 ====================================
1075 - Implement 'stch' stretch feature for Syriac Abbreviation Mark.
1076 https://github.com/harfbuzz/harfbuzz/issues/141
1077 - Disable use of decompose_compatibility() callback.
1078 - Implement "shaping" of various Unicode space characters, even
1079 if the font does not support them.
1080 https://github.com/harfbuzz/harfbuzz/issues/153
1081 - If font does not support U+2011 NO-BREAK HYPHEN, fallback to
1083 - Changes resulting from libFuzzer continuous fuzzing:
1084 * Reject font tables that need more than 8 edits,
1085 * Bound buffer growth during shaping to 32x,
1086 * Fix assertions and other issues at OOM / buffer max-growth.
1087 - Misc fixes and optimizations.
1089 * All fonts created with hb_font_create() now inherit from
1090 (ie. have parent) hb_font_get_empty().
1093 Overview of changes leading to 1.0.6
1094 Thursday, October 15, 2015
1095 ====================================
1097 - Reduce max nesting level in OT lookups from 8 to 6.
1098 Should not affect any real font as far as I know.
1099 - Fix memory access issue in ot-font.
1100 - Revert default load-flags of fonts created using hb_ft_font_create()
1101 back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in
1102 last release (1.0.5), but caused major issues, so revert.
1103 https://github.com/harfbuzz/harfbuzz/issues/143
1106 Overview of changes leading to 1.0.5
1107 Tuesday, October 13, 2015
1108 ====================================
1110 - Fix multiple memory access bugs discovered using libFuzzer.
1111 https://github.com/harfbuzz/harfbuzz/issues/139
1112 Everyone should upgrade to this version as soon as possible.
1113 We now have continuous fuzzing set up, to avoid issues like
1114 these creeping in again.
1118 * hb_font_set_parent().
1119 * hb_ft_font_[sg]et_load_flags()
1120 The default flags for fonts created using hb_ft_font_create()
1121 has changed to default to FT_LOAD_DEFAULT now. Previously it
1122 was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING.
1125 * Fonts now default to units-per-EM as their scale, instead of 0.
1126 * hb_font_create_sub_font() does NOT make parent font immutable
1127 anymore. hb_font_make_immutable() does.
1130 Overview of changes leading to 1.0.4
1131 Wednesday, September 30, 2015
1132 ====================================
1134 - Fix minor out-of-bounds read error.
1137 Overview of changes leading to 1.0.3
1138 Tuesday, September 1, 2015
1139 ====================================
1141 - Start of user documentation, from Simon Cozens!
1142 - Implement glyph_extents() for TrueType fonts in hb-ot-font.
1143 - Improve GPOS cursive attachments with conflicting lookups.
1144 - More fixes for cluster-level = 1.
1145 - Uniscribe positioning fix.
1148 Overview of changes leading to 1.0.2
1149 Wednesday, August 19, 2015
1150 ====================================
1152 - Fix shaping with cluster-level > 0.
1153 - Fix Uniscribe backend font-size scaling.
1154 - Declare dependencies in harfbuzz.pc.
1155 FreeType is not declared though, to avoid bugs in pkg-config
1156 0.26 with recursive dependencies.
1157 - Slightly improved debug infrastructure. More to come later.
1161 Overview of changes leading to 1.0.1
1162 Monday, July 27, 2015
1163 ====================================
1165 - Fix out-of-bounds access in USE shaper.
1168 Overview of changes leading to 1.0.0
1169 Sunday, July 26, 2015
1170 ====================================
1172 - Implement Universal Shaping Engine:
1173 https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm
1174 http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/
1175 - Bump version to 1.0.0. The soname was NOT bumped.
1178 Overview of changes leading to 0.9.42
1179 Thursday, July 26, 2015
1180 =====================================
1182 - New API to allow for retrieving finer-grained cluster
1183 mappings if the client desires to handle them. Default
1184 behavior is unchanged.
1185 - Fix cluster merging when removing default-ignorables.
1186 - Update to Unicode 8.0
1187 - hb-graphite2 fixes.
1189 - Removed HB_NO_MERGE_CLUSTERS hack.
1191 hb_buffer_cluster_level_t enum
1192 hb_buffer_get_cluster_level()
1193 hb_buffer_set_cluster_level()
1194 hb-shape / hb-view --cluster-level
1197 Overview of changes leading to 0.9.41
1198 Thursday, June 18, 2015
1199 =====================================
1201 - Fix hb-coretext with trailing whitespace in right-to-left.
1202 - New API: hb_buffer_reverse_range().
1203 - Allow implementing atomic ops in config.h.
1204 - Fix hb_language_t in language bindings.
1208 Overview of changes leading to 0.9.40
1209 Friday, March 20, 2015
1210 =====================================
1212 - Another hb-coretext crasher fix. Ouch!
1216 Overview of changes leading to 0.9.39
1217 Wednesday, March 4, 2015
1218 =====================================
1220 - Critical hb-coretext fixes.
1221 - Optimizations and refactoring; no functional change
1226 Overview of changes leading to 0.9.38
1227 Friday, January 23, 2015
1228 =====================================
1230 - Fix minor out-of-bounds access in Indic shaper.
1231 - Change New Tai Lue shaping engine from South-East Asian to default,
1232 reflecting change in Unicode encoding model.
1233 - Add hb-shape --font-size. Can take up to two numbers for separate
1235 - Fix CoreText and FreeType scale issues with negative scales.
1236 - Reject blobs larger than 2GB. This might break some icu-le-hb clients
1237 that need security fixes. See:
1238 http://www.icu-project.org/trac/ticket/11450
1239 - Avoid accessing font tables during face destruction, in casce rogue
1240 clients released face data already.
1241 - Fix up gobject-introspection a bit. Python bindings kinda working.
1245 hb_ft_face_create_referenced()
1246 hb_ft_font_create_referenced()
1249 Overview of changes leading to 0.9.37
1250 Wednesday, December 17, 2014
1251 =====================================
1253 - Fix out-of-bounds access in Context lookup format 3.
1254 - Indic: Allow ZWJ/ZWNJ before syllable modifiers.
1257 Overview of changes leading to 0.9.36
1258 Thursday, November 20, 2014
1259 =====================================
1261 - First time that three months went by without a release since
1262 0.9.2 was released on August 10, 2012!
1263 - Fix performance bug in hb_ot_collect_glyphs():
1264 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869
1265 - Add basic vertical-text support to hb-ot-font.
1269 Overview of changes leading to 0.9.35
1270 Saturday, August 13, 2014
1271 =====================================
1273 - Fix major shape-plan caching bug when more than one shaper were
1274 provided to hb_shape_full() (as exercised by XeTeX).
1275 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
1276 - Fix Arabic fallback shaping regression. This was broken in 0.9.32.
1277 - Major hb-coretext fixes. That backend is complete now, including
1278 respecing buffer direction and language, down to vertical writing.
1279 - Build fixes for Windows CE. Should build fine now.
1281 Use atexit() only if it's safe to call from shared library
1282 https://bugs.freedesktop.org/show_bug.cgi?id=82246
1283 Mandaic had errors in its Unicode Joining_Type
1284 https://bugs.freedesktop.org/show_bug.cgi?id=82306
1287 * hb_buffer_clear_contents() does not reset buffer flags now.
1289 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
1290 need to set flags for different pieces of text. The flags now
1291 are something the client sets up once, depending on how it
1292 actually uses the buffer. As such, don't clear it in
1295 I don't expect any changes to be needed to any existing client.
1298 Overview of changes leading to 0.9.34
1299 Saturday, August 2, 2014
1300 =====================================
1302 - hb_feature_from_string() now accepts CSS font-feature-settings format.
1303 - As a result, hb-shape / hb-view --features also accept CSS-style strings.
1304 Eg, "'liga' off" is accepted now.
1305 - Add old-spec Myanmar shaper:
1306 https://bugs.freedesktop.org/show_bug.cgi?id=81775
1307 - Don't apply 'calt' in Hangul shaper.
1308 - Fix mark advance zeroing for Hebrew shaper:
1309 https://bugs.freedesktop.org/show_bug.cgi?id=76767
1310 - Implement Windows-1256 custom Arabic shaping. Only built on Windows,
1311 and requires help from get_glyph(). Used by Firefox.
1312 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
1313 - Disable 'liga' in vertical text.
1317 * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
1319 Previously, we expected users to provide BOT/EOT flags when the
1320 text *segment* was at paragraph boundaries. This meant that for
1321 clients that provide full paragraph to HarfBuzz (eg. Pango), they
1324 hb_buffer_set_flags (hb_buffer,
1325 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
1326 (item_offset + item_length == paragraph_length ?
1327 HB_BUFFER_FLAG_EOT : 0));
1329 hb_buffer_add_utf8 (hb_buffer,
1330 paragraph_text, paragraph_length,
1331 item_offset, item_length);
1333 After this change such clients can simply say:
1335 hb_buffer_set_flags (hb_buffer,
1336 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
1338 hb_buffer_add_utf8 (hb_buffer,
1339 paragraph_text, paragraph_length,
1340 item_offset, item_length);
1342 Ie, HarfBuzz itself checks whether the segment is at the beginning/end
1343 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
1344 continue not setting any flags whatsoever.
1346 Another way to put it is: if there's pre-context text in the buffer,
1347 HarfBuzz ignores the BOT flag. If there's post-context, it ignores
1351 Overview of changes leading to 0.9.33
1352 Tuesday, July 22, 2014
1353 =====================================
1355 - Turn off ARabic 'cswh' feature that was accidentally turned on.
1356 - Add HB_TAG_MAX_SIGNED.
1357 - Make hb_face_make_immutable() really make face immutable!
1358 - Windows build fixes.
1361 Overview of changes leading to 0.9.32
1362 Thursday, July 17, 2014
1363 =====================================
1365 - Apply Arabic shaping features in spec order exactly.
1366 - Another fix for Mongolian free variation selectors.
1367 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
1369 - Minor adjustment to U+FFFD logic.
1370 - Fix hb-coretext build.
1373 Overview of changes leading to 0.9.31
1374 Wednesday, July 16, 2014
1375 =====================================
1377 - Only accept valid UTF-8/16/32; we missed many cases before.
1378 - Better shaping of invalid UTF-8/16/32. Falls back to
1379 U+FFFD REPLACEMENT CHARACTER now.
1380 - With all changes in this release, the buffer will contain fully
1381 valid Unicode after hb_buffer_add_utf8/16/32 no matter how
1382 broken the input is. This can be overridden though. See below.
1383 - Fix Mongolian Variation Selectors for fonts without GDEF.
1384 - Fix minor invalid buffer access.
1385 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language()
1386 now uses these instead of private tags.
1389 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
1390 used to do, ie. no validity check on the input at all. add_utf32
1391 now replaces invalid Unicode codepoints with the replacement
1392 character (see below).
1393 * hb_buffer_set_replacement_codepoint()
1394 * hb_buffer_get_replacement_codepoint()
1395 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
1396 we detected broken input, we replaced that with (hb_codepoint_t)-1.
1397 This has changed to use U+FFFD now, but can be changed using these
1401 Overview of changes leading to 0.9.30
1402 Wednesday, July 9, 2014
1403 =====================================
1405 - Update to Unicode 7.0.0:
1406 * New scripts Manichaean and Psalter Pahlavi are shaped using
1408 * All the other new scripts to through the generic shaper for
1410 - Minor Indic improvements.
1411 - Fix graphite2 backend cluster mapping [crasher!]
1413 * New HB_SCRIPT_* values for Unicode 7.0 scripts.
1414 * New function hb_ot_layout_language_get_required_feature().
1418 Overview of changes leading to 0.9.29
1419 Thursday, May 29, 2014
1420 =====================================
1422 - Implement cmap in hb-ot-font.h. No variation-selectors yet.
1423 - Myanmar: Allow MedialYa+Asat.
1424 - Various Indic fixes:
1425 * Support most characters in Extended Devanagary and Vedic
1427 * Allow digits and a some punctuation as consonant placeholders.
1431 Overview of changes leading to 0.9.28
1432 Monday, April 28, 2014
1433 =====================================
1435 - Unbreak old-spec Indic shaping. (bug 76705)
1436 - Fix shaping of U+17DD and U+0FC6.
1437 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
1438 for shipping libraries. It's an option for further experimentation
1439 right now. When we are sure how to do it properly, we will add
1440 public run-time API for the functionality.
1444 Overview of changes leading to 0.9.27
1445 Tuesday, March 18, 2014
1446 =====================================
1448 - Don't use "register" storage class specifier
1449 - Wrap definition of free_langs() with HAVE_ATEXIT
1450 - Add coretext_aat shaper and hb_coretext_face_create() constructor
1451 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
1452 - Add Myanmar test case from OpenType Myanmar spec
1453 - Only do fallback Hebrew composition if no GPOS 'mark' available
1454 - Allow bootstrapping without gtk-doc
1455 - Use AM_MISSING_PROG for ragel and git
1456 - Typo in ucdn's Makefile.am
1457 - Improve MemoryBarrier() implementation
1460 Overview of changes leading to 0.9.26
1461 Thursday, January 30, 2014
1462 =====================================
1465 - Fix application of 'rtlm' feature.
1466 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
1467 - New header: hb-ot-shape.h
1468 - Uniscribe: fix scratch-buffer accounting.
1469 - Reorder Tai Tham SAKOT to after tone-marks.
1470 - Add Hangul shaper.
1472 hb-ot-shape-complex-hangul.cc
1473 hb-ot-shape-complex-hebrew.cc
1474 hb-ot-shape-complex-tibetan.cc
1475 - Disable 'cswh' feature in Arabic shaper.
1476 - Coretext: better handle surrogate pairs.
1477 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
1480 Overview of changes leading to 0.9.25
1481 Wednesday, December 4, 2013
1482 =====================================
1484 - Myanmar shaper improvements.
1485 - Avoid font fallback in CoreText backend.
1486 - Additional OpenType language tag mappiongs.
1487 - More aggressive shape-plan caching.
1488 - Build with / require automake 1.13.
1489 - Build with libtool 2.4.2.418 alpha to support ppc64le.
1492 Overview of changes leading to 0.9.24
1493 Tuesday, November 13, 2013
1494 =====================================
1496 - Misc compiler warning fixes with clang.
1497 - No functional changes.
1500 Overview of changes leading to 0.9.23
1501 Monday, October 28, 2013
1502 =====================================
1504 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
1505 - Fix (Chain)Context recursion with non-monotone lookup positions.
1506 - Misc Indic bug fixes.
1507 - New Javanese / Buginese shaping, similar to Windows 8.1.
1510 Overview of changes leading to 0.9.22
1511 Thursday, October 3, 2013
1512 =====================================
1514 - Fix use-after-end-of-scope in hb_language_from_string().
1515 - Fix hiding of default_ignorables if font doesn't have space glyph.
1516 - Protect against out-of-range lookup indices.
1520 * Added hb_ot_layout_table_get_lookup_count()
1523 Overview of changes leading to 0.9.21
1524 Monday, September 16, 2013
1525 =====================================
1527 - Rename gobject-introspection library name from harfbuzz to HarfBuzz.
1528 - Remove (long disabled) hb-old and hb-icu-le test shapers.
1529 - Misc gtk-doc and gobject-introspection annotations.
1533 * Add HB_SET_VALUE_INVALID
1535 Overview of changes leading to 0.9.20
1536 Thursday, August 29, 2013
1537 =====================================
1540 - Misc substitute_closure() fixes.
1544 - gtk-doc boilerplate integrated. Docs are built now, but
1545 contain no contents. By next release hopefully we have
1546 some content in. Enable using --enable-gtk-doc.
1548 GObject and Introspection:
1549 - Added harfbuzz-gobject library (hb-gobject.h) that has type
1550 bindings for all HarfBuzz objects and enums. Enable using
1552 - Added gobject-introspection boilerplate. Nothing useful
1553 right now. Work in progress. Gets enabled automatically if
1554 --with-gobject is used. Override with --disable-introspection.
1557 - Apply 'mark' in Myanmar shaper.
1558 - Don't apply 'dlig' by default.
1561 - Support user features.
1562 - Fix loading of fonts that are also installed on the system.
1563 - Fix shaping of Arabic Presentation Forms.
1564 - Fix build with wide chars.
1567 - Support user features.
1570 - hb_face_t code moved to hb-face.h / hb-face.cc.
1571 - Added hb-deprecated.h.
1574 - Added HB_DISABLE_DEPRECATED.
1575 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
1576 HB_SCRIPT_CANADIAN_SYLLABICS.
1577 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
1578 HB_BUFFER_FLAG_DEFAULT.
1579 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
1580 HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
1583 Overview of changes leading to 0.9.19
1584 Tuesday, July 16, 2013
1585 =====================================
1588 - Better handling of multiple variation selectors in a row.
1589 - Pass on variation selector to GSUB if not consumed by cmap.
1590 - Fix undefined memory access.
1591 - Add Javanese config to Indic shaper.
1594 Overview of changes leading to 0.9.18
1595 Tuesday, May 28, 2013
1596 =====================================
1600 - All unneeded code is all disabled by default,
1602 - Uniscribe and CoreText shapers can be enabled with their --with options,
1604 - icu_le and old shapers cannot be enabled for now,
1606 - glib, freetype, and cairo will be detected automatically.
1607 They can be force on/off'ed with their --with options,
1609 - icu and graphite2 are default off, can be enabled with their --with
1612 Moreover, ICU support is now build into a separate library:
1613 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
1614 Distros can enable ICU now without every application on earth
1615 getting linked to via libharfbuzz.so.
1617 For distros I recommend that they make sure they are building --with-glib
1618 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
1619 And package harfbuzz and harfbuzz-icu separately.
1622 Overview of changes leading to 0.9.17
1623 Monday, May 20, 2013
1624 =====================================
1627 - Fix bug in hb_set_get_min().
1628 - Fix regression with Arabic mark positioning / width-zeroing.
1630 Overview of changes leading to 0.9.16
1631 Friday, April 19, 2013
1632 =====================================
1634 - Major speedup in OpenType lookup processing. With the Amiri
1635 Arabic font, this release is over 3x faster than previous
1636 release. All scripts / languages should see this speedup.
1638 - New --num-iterations option for hb-shape / hb-view; useful for
1641 Overview of changes leading to 0.9.15
1642 Friday, April 05, 2013
1643 =====================================
1646 - Fix crasher in graphite2 shaper.
1647 - Fix Arabic mark width zeroing regression.
1648 - Don't compose Hangul jamo into Unicode syllables.
1651 Overview of changes leading to 0.9.14
1652 Thursday, March 21, 2013
1653 =====================================
1656 - Fix time-consuming sanitize with malicious fonts.
1657 - Implement hb_buffer_deserialize_glyphs() for both json and text.
1658 - Do not ignore Hangul filler characters.
1660 * Fix Malayalam pre-base reordering interaction with post-forms.
1661 * Further adjust ZWJ handling. Should fix known regressions from
1665 Overview of changes leading to 0.9.13
1666 Thursday, February 25, 2013
1667 =====================================
1670 - Ngapi HarfBuzz Hackfest in London (February 2013):
1671 * Fixed all known Indic bugs,
1672 * New Win8-style Myanmar shaper,
1673 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
1674 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
1675 matching GSUB/GPOS lookups,
1676 * Fix 'Phags-Pa U+A872 shaping,
1677 * Fix partial disabling of default-on features,
1678 * Allow disabling of TrueType kerning.
1679 - Fix possible crasher with broken fonts with overlapping tables.
1680 - Removed generated files from git again. So, one needs ragel to
1681 bootstrap from the git tree.
1684 - hb_shape() and related APIs now abort if buffer direction is
1685 HB_DIRECTION_INVALID. Previously, hb_shape() was calling
1686 hb_buffer_guess_segment_properties() on the buffer before
1687 shaping. The heuristics in that function are fragile. If the
1688 user really wants the old behvaior, they can call that function
1689 right before calling hb_shape() to get the old behavior.
1690 - hb_blob_create_sub_blob() always creates sub-blob with
1691 HB_MEMORY_MODE_READONLY. See comments for the reason.
1694 Overview of changes leading to 0.9.12
1695 Thursday, January 18, 2013
1696 =====================================
1698 - Build fixes for Sun compiler.
1701 Overview of changes leading to 0.9.11
1702 Thursday, January 10, 2013
1703 =====================================
1706 - Fix GPOS mark attachment with null Anchor offsets.
1707 - [Indic] Fix old-spec reordering of viramas if sequence ends in one.
1708 - Fix multi-threaded shaper data creation crash.
1709 - Add atomic ops for Solaris.
1712 - Rename hb_buffer_clear() to hb_buffer_clear_contents().
1715 Overview of changes leading to 0.9.10
1716 Thursday, January 3, 2013
1717 =====================================
1719 - [Indic] Fixed rendering of Malayalam dot-reph
1720 - Updated OT language tags.
1721 - Updated graphite2 backend.
1722 - Improved hb_ot_layout_get_size_params() logic.
1723 - Improve hb-shape/hb-view help output.
1724 - Fixed hb-set.h implementation to not crash.
1725 - Fixed various issues with hb_ot_layout_collect_lookups().
1726 - Various build fixes.
1730 hb_graphite2_face_get_gr_face()
1731 hb_graphite2_font_get_gr_font()
1732 hb_coretext_face_get_cg_font()
1736 hb_ot_layout_get_size_params()
1739 Overview of changes leading to 0.9.9
1740 Wednesday, December 5, 2012
1741 ====================================
1743 - Fix build on Windows.
1744 - Minor improvements.
1747 Overview of changes leading to 0.9.8
1748 Tuesday, December 4, 2012
1749 ====================================
1752 - Actually implement hb_shape_plan_get_shaper ().
1753 - Make UCDB data tables const.
1754 - Lots of internal refactoring in OTLayout tables.
1755 - Flesh out hb_ot_layout_lookup_collect_glyphs().
1759 hb_ot_layout_collect_lookups()
1760 hb_ot_layout_get_size_params()
1763 Overview of changes leading to 0.9.7
1764 Sunday, November 21, 2012
1765 ====================================
1768 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
1770 - Fix Arabic contextual joining using pre-context text.
1771 - Fix Sinhala "split matra" mess.
1772 - Fix Khmer shaping with broken fonts.
1773 - Implement Thai "PUA" shaping for old fonts.
1774 - Do NOT route Kharoshthi script through the Indic shaper.
1775 - Disable fallback positioning for Indic and Thai shapers.
1779 hb-shape / hb-view changes:
1781 - Add --text-before and --text-after
1782 - Add --bot / --eot / --preserve-default-ignorables
1783 - hb-shape --output-format=json
1792 HB_BUFFER_FLAGS_DEFAULT
1795 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
1797 hb_buffer_set_flags()
1798 hb_buffer_get_flags()
1800 HB_BUFFER_SERIALIZE_FLAGS
1801 hb_buffer_serialize_glyphs()
1802 hb_buffer_deserialize_glyphs()
1803 hb_buffer_serialize_list_formats()
1807 hb_set_get_population()
1810 hb_face_[sg]et_glyph_count()
1812 hb_segment_properties_t
1813 HB_SEGMENT_PROPERTIES_DEFAULT
1814 hb_segment_properties_equal()
1815 hb_segment_properties_hash()
1817 hb_buffer_set_segment_properties()
1818 hb_buffer_get_segment_properties()
1820 hb_ot_layout_glyph_class_t
1821 hb_ot_layout_get_glyph_class()
1822 hb_ot_layout_get_glyphs_in_class()
1825 hb_shape_plan_create()
1826 hb_shape_plan_create_cached()
1827 hb_shape_plan_get_empty()
1828 hb_shape_plan_reference()
1829 hb_shape_plan_destroy()
1830 hb_shape_plan_set_user_data()
1831 hb_shape_plan_get_user_data()
1832 hb_shape_plan_execute()
1833 hb_shape_plan_get_shaper()
1835 hb_ot_shape_plan_collect_lookups()
1840 - Remove "mask" parameter from hb_buffer_add().
1841 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
1842 - hb-set.h API const correction.
1843 - Renamed hb_set_min/max() to hb_set_get_min/max().
1844 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
1845 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
1849 Overview of changes leading to 0.9.6
1850 Sunday, November 13, 2012
1851 ====================================
1853 - Don't clear pre-context text if no new context is provided.
1854 - Fix ReverseChainingSubstLookup, which was totally borked.
1855 - Adjust output format of hb-shape a bit.
1856 - Include config.h.in in-tree. Makes it easier for alternate build systems.
1857 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
1858 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
1859 - Drop glyphs for all of Unicode Default_Ignorable characters.
1863 - Enable 'dlig' and 'mset' features in Arabic shaper.
1864 - Implement 'Phags-pa shaping, improve Mongolian.
1867 - Decompose Sinhala split matras the way old HarfBuzz / Pango did.
1868 - Initial support for Consonant Medials.
1869 - Start adding new-style Myanmar shaping.
1870 - Make reph and 'pref' logic introspect the font.
1871 - Route Meetei-Mayek through the Indic shaper.
1872 - Don't apply 'liga' in Indic shaper.
1873 - Improve Malayalam pre-base reordering Ra interaction with Chillus.
1877 Overview of changes leading to 0.9.5
1878 Sunday, October 14, 2012
1879 ====================================
1881 - Synthetic-GSUB Arabic fallback shaping.
1883 - Misc Indic improvements.
1885 - Add build system support for pthread.
1887 - Imported UCDN for in-tree Unicode callbacks implementation.
1889 - Context-aware Arabic joining.
1895 hb_feature_to/from-string()
1896 hb_buffer_[sg]et_content_type()
1900 Overview of changes leading to 0.9.4
1901 Tuesday, Sep 03, 2012
1902 ====================================
1904 - Indic improvements with old-spec Malayalam.
1906 - Better fallback glyph positioning, specially with Thai / Lao marks.
1908 - Implement dotted-circle insertion.
1910 - Better Arabic fallback shaping / ligation.
1912 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
1918 Overview of changes leading to 0.9.3
1919 Friday, Aug 18, 2012
1920 ====================================
1922 - Fixed fallback mark positioning for left-to-right text.
1924 - Improve mark positioning for the remaining combining classes.
1926 - Unbreak Thai and fallback Arabic shaping.
1928 - Port Arabic shaper to shape-plan caching.
1930 - Use new ICU normalizer functions.
1934 Overview of changes leading to 0.9.2
1935 Friday, Aug 10, 2012
1936 ====================================
1938 - Over a thousand commits! This is the first major release of HarfBuzz.
1940 - HarfBuzz is feature-complete now! It should be in par, or better, than
1941 both Pango's shapers and old HarfBuzz / Qt shapers.
1943 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
1945 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
1946 Sinhala, N'ko, Mongolian, and Mandaic.
1948 - New Thai / Lao shaper.
1950 - Tibetan / Hangul support in the generic shaper.
1952 - Synthetic GDEF support for fonts without a GDEF table.
1954 - Fallback mark positioning for fonts without a GPOS table.
1956 - Unicode normalization shaping heuristic during glyph mapping.
1958 - New experimental Graphite2 backend.
1960 - New Uniscribe backend (primarily for testing).
1962 - New CoreText backend (primarily for testing).
1964 - Major optimization and speedup.
1966 - Test suites and testing infrastructure (work in progress).
1968 - Greatly improved hb-view cmdline tool.
1970 - hb-shape cmdline tool.
1972 - Unicode 6.1 support.
1974 Summary of API changes:
1978 - Users are expected to only include main header files now (ie. hb.h,
1979 hb-glib.h, hb-ft.h, ...)
1981 - All struct tag names had their initial underscore removed.
1982 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
1984 - All set_user_data() functions now take a "replace" boolean parameter.
1986 - hb_buffer_create() takes zero arguments now.
1987 Use hb_buffer_pre_allocate() to pre-allocate.
1989 - hb_buffer_add_utf*() now accept -1 for length parameteres,
1990 meaning "nul-terminated".
1992 - hb_direction_t enum values changed.
1994 - All *_from_string() APIs now take a length parameter to allow for
1995 non-nul-terminated strings. A -1 length means "nul-terminated".
1997 - Typedef for hb_language_t changed.
1999 - hb_get_table_func_t renamed to hb_reference_table_func_t.
2001 - hb_ot_layout_table_choose_script()
2003 - Various renames in hb-unicode.h.
2007 - hb_buffer_guess_properties()
2008 Automatically called by hb_shape().
2010 - hb_buffer_normalize_glyphs()
2012 - hb_tag_from_string()
2018 - hb_face_reference_blob()
2019 - hb_face_[sg]et_index()
2020 - hb_face_set_upem()
2022 - hb_font_get_glyph_name_func_t
2023 hb_font_get_glyph_from_name_func_t
2024 hb_font_funcs_set_glyph_name_func()
2025 hb_font_funcs_set_glyph_from_name_func()
2026 hb_font_get_glyph_name()
2027 hb_font_get_glyph_from_name()
2028 hb_font_glyph_to_string()
2029 hb_font_glyph_from_string()
2031 - hb_font_set_funcs_data()
2033 - hb_ft_font_set_funcs()
2034 - hb_ft_font_get_face()
2036 - hb-gobject.h (work in progress)
2038 - hb_ot_shape_glyphs_closure()
2039 hb_ot_layout_substitute_closure_lookup()
2045 - hb_unicode_combining_class_t
2047 - hb_unicode_compose_func_t
2048 hb_unicode_decompose_func_t
2049 hb_unicode_decompose_compatibility_func_t
2050 hb_unicode_funcs_set_compose_func()
2051 hb_unicode_funcs_set_decompose_func()
2052 hb_unicode_funcs_set_decompose_compatibility_func()
2053 hb_unicode_compose()
2054 hb_unicode_decompose()
2055 hb_unicode_decompose_compatibility()
2059 - hb_ft_get_font_funcs()
2061 - hb_ot_layout_substitute_start()
2062 hb_ot_layout_substitute_lookup()
2063 hb_ot_layout_substitute_finish()
2064 hb_ot_layout_position_start()
2065 hb_ot_layout_position_lookup()
2066 hb_ot_layout_position_finish()
2070 Overview of changes leading to 0.6.0
2071 Friday, May 27, 2011
2072 ====================================
2074 - Vertical text support in GPOS
2075 - Almost all API entries have unit tests now, under test/
2076 - All thread-safety issues are fixed
2078 Summary of API changes follows.
2085 hb_language_get_default()
2086 hb_direction_to_string()
2087 hb_direction_from_string()
2088 hb_script_get_horizontal_direction()
2092 hb_category_t renamed to hb_unicode_general_category_t
2095 hb_language_t is a typed pointers now
2101 * Use ISO 15924 tags for hb_script_t:
2104 hb_script_from_iso15924_tag()
2105 hb_script_to_iso15924_tag()
2106 hb_script_from_string()
2109 HB_SCRIPT_* enum members changed value.
2112 * Buffer API streamlined:
2116 hb_buffer_set_length()
2117 hb_buffer_allocation_successful()
2120 hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
2121 hb_buffer_add_glyph() renamed to hb_buffer_add()
2125 hb_buffer_clear_positions()
2128 hb_buffer_get_glyph_infos() takes an out length parameter now
2129 hb_buffer_get_glyph_positions() takes an out length parameter now
2132 * Blob API streamlined:
2136 hb_blob_get_data_writable()
2139 hb_blob_create_empty() renamed to hb_blob_get_empty()
2144 hb_blob_is_writable()
2145 hb_blob_try_writable()
2148 hb_blob_create() takes user_data before destroy now
2151 * Unicode functions API:
2153 o Unicode function vectors can subclass other unicode function vectors now.
2154 Unimplemented callbacks in the subclass automatically chainup to the parent.
2156 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
2157 take a user_data and its respective destroy callback.
2160 hb_unicode_funcs_get_empty()
2161 hb_unicode_funcs_get_default()
2162 hb_unicode_funcs_get_parent()
2165 hb_unicode_funcs_create() now takes a parent_funcs.
2167 o Removed func getter functions:
2168 hb_unicode_funcs_get_mirroring_func()
2169 hb_unicode_funcs_get_general_category_func()
2170 hb_unicode_funcs_get_script_func()
2171 hb_unicode_funcs_get_combining_class_func()
2172 hb_unicode_funcs_get_eastasian_width_func()
2178 hb_face_get_table() renamed to hb_face_reference_table()
2179 hb_face_create_for_data() renamed to hb_face_create()
2182 hb_face_create_for_tables() takes user_data before destroy now
2183 hb_face_reference_table() returns empty blob instead of NULL
2184 hb_get_table_func_t accepts the face as first parameter now
2188 o Fonts can subclass other fonts now. Unimplemented callbacks in the
2189 subclass automatically chainup to the parent. When chaining up,
2190 scale is adjusted if the parent font has a different scale.
2192 o All hb_font_funcs_t callbacks take a user_data now. Their setters
2193 take a user_data and its respective destroy callback.
2196 hb_font_get_parent()
2197 hb_font_funcs_get_empty()
2198 hb_font_create_sub_font()
2201 hb_font_funcs_copy()
2202 hb_font_unset_funcs()
2204 o Removed func getter functions:
2205 hb_font_funcs_get_glyph_func()
2206 hb_font_funcs_get_glyph_advance_func()
2207 hb_font_funcs_get_glyph_extents_func()
2208 hb_font_funcs_get_contour_point_func()
2209 hb_font_funcs_get_kerning_func()
2212 hb_font_create() takes a face and references it now
2213 hb_font_set_funcs() takes user_data before destroy now
2214 hb_font_set_scale() accepts signed integers now
2215 hb_font_get_contour_point_func_t now takes glyph first, then point_index
2216 hb_font_get_glyph_func_t returns a success boolean now
2219 * Changed object model:
2221 o All object types have a _get_empty() now:
2223 hb_buffer_get_empty()
2226 hb_font_funcs_get_empty()
2227 hb_unicode_funcs_get_empty()
2229 o Added _set_user_data() and _get_user_data() for all object types:
2230 hb_blob_get_user_data()
2231 hb_blob_set_user_data()
2232 hb_buffer_get_user_data()
2233 hb_buffer_set_user_data()
2234 hb_face_get_user_data()
2235 hb_face_set_user_data()
2236 hb_font_funcs_get_user_data()
2237 hb_font_funcs_set_user_data()
2238 hb_font_get_user_data()
2239 hb_font_set_user_data()
2240 hb_unicode_funcs_get_user_data()
2241 hb_unicode_funcs_set_user_data()
2243 o Removed the _get_reference_count() from all object types:
2244 hb_blob_get_reference_count()
2245 hb_buffer_get_reference_count()
2246 hb_face_get_reference_count()
2247 hb_font_funcs_get_reference_count()
2248 hb_font_get_reference_count()
2249 hb_unicode_funcs_get_reference_count()
2251 o Added _make_immutable() and _is_immutable() for all object types except for buffer:
2252 hb_blob_make_immutable()
2253 hb_blob_is_immutable()
2254 hb_face_make_immutable()
2255 hb_face_is_immutable()
2258 * Changed API for vertical text support
2260 o The following callbacks where removed:
2261 hb_font_get_glyph_advance_func_t
2262 hb_font_get_kerning_func_t
2264 o The following new callbacks added instead:
2265 hb_font_get_glyph_h_advance_func_t
2266 hb_font_get_glyph_v_advance_func_t
2267 hb_font_get_glyph_h_origin_func_t
2268 hb_font_get_glyph_v_origin_func_t
2269 hb_font_get_glyph_h_kerning_func_t
2270 hb_font_get_glyph_v_kerning_func_t
2272 o The following API removed as such:
2273 hb_font_funcs_set_glyph_advance_func()
2274 hb_font_funcs_set_kerning_func()
2275 hb_font_get_glyph_advance()
2276 hb_font_get_kerning()
2278 o New API added instead:
2279 hb_font_funcs_set_glyph_h_advance_func()
2280 hb_font_funcs_set_glyph_v_advance_func()
2281 hb_font_funcs_set_glyph_h_origin_func()
2282 hb_font_funcs_set_glyph_v_origin_func()
2283 hb_font_funcs_set_glyph_h_kerning_func()
2284 hb_font_funcs_set_glyph_v_kerning_func()
2285 hb_font_get_glyph_h_advance()
2286 hb_font_get_glyph_v_advance()
2287 hb_font_get_glyph_h_origin()
2288 hb_font_get_glyph_v_origin()
2289 hb_font_get_glyph_h_kerning()
2290 hb_font_get_glyph_v_kerning()
2292 o The following higher-leve API added for convenience:
2293 hb_font_get_glyph_advance_for_direction()
2294 hb_font_get_glyph_origin_for_direction()
2295 hb_font_add_glyph_origin_for_direction()
2296 hb_font_subtract_glyph_origin_for_direction()
2297 hb_font_get_glyph_kerning_for_direction()
2298 hb_font_get_glyph_extents_for_origin()
2299 hb_font_get_glyph_contour_point_for_origin()
2302 * OpenType Layout API:
2305 hb_ot_layout_position_start()
2306 hb_ot_layout_substitute_start()
2307 hb_ot_layout_substitute_finish()
2313 hb_glib_script_to_script()
2314 hb_glib_script_from_script()
2315 hb_icu_script_to_script()
2316 hb_icu_script_from_script()
2319 * Version API added: