1 Overview of changes leading to 2.5.3
2 Wednesday, June 26, 2019
3 ====================================
4 - Fix UCD script data for Unicode 10+ scripts. This was broken since 2.5.0.
5 - More optimizations for HB_TINY.
8 Overview of changes leading to 2.5.2
9 Thursday, June 20, 2019
10 ====================================
11 - More hb-config.hh facilities to shrink library size, namely when built as
13 - New documentation of custom configurations in CONFIG.md.
14 - Fix build on gcc 4.8. That's supported again.
15 - Universal Shaping Engine improvements thanks to David Corbett.
16 - API Changes: Undeprecate some horizontal-kerning API and re-enable in hb-ft,
17 such that Type1 fonts will continue kerning.
20 Overview of changes leading to 2.5.1
22 ====================================
23 - Fix build with various versions of Visual Studio.
24 - Improved documentation, thanks to Nathan Willis.
25 - Bugfix in subsetting glyf table.
26 - Improved scripts for cross-compiling for Windows using mingw.
27 - Rename HB_MATH_GLYPH_PART_FLAG_EXTENDER to HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER.
28 A deprecated macro is added for backwards-compatibility.
31 Overview of changes leading to 2.5.0
33 ====================================
34 - This release does not include much functional changes, but includes major internal
35 code-base changes. We now require C++11. Support for gcc 4.8 and earlier has been
37 - New hb-config.hh facility for compiling smaller library for embedded and web usecases.
38 - New Unicode Character Databse implementation that is half the size of previously-used
40 - Subsetter improvements.
41 - Improved documentation, thanks to Nathan Willis.
45 Overview of changes leading to 2.4.0
46 Monday, March 25, 2019
47 ====================================
50 - Subsetter improvements.
52 HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE
53 hb_directwrite_face_create()
56 Overview of changes leading to 2.3.1
57 Wednesday, January 30, 2019
58 ====================================
60 - Misc internal housekeeping cleanup.
63 Overview of changes leading to 2.3.0
64 Thursday, December 20, 2018
65 ====================================
66 - Fix regression on big-endian architectures. Ouch!
67 - Misc bug and build fixes.
68 - Fix subsetting of simple GSUB/GDEF.
69 - Merge CFF / CFF2 support contributed by Adobe. This mostly involves
70 the subsetter, but also get_glyph_extents on CFF fonts.
73 +hb_aat_layout_has_substitution()
74 +hb_aat_layout_has_positioning()
75 +hb_aat_layout_has_tracking()
78 Overview of changes leading to 2.2.0
79 Thursday, November 29, 2018
80 ====================================
81 - Misc shaping bug fixes.
82 - Add font variations named-instance API.
83 - Deprecate font variations axis enumeration API and add replacement.
84 - AAT shaping improvements:
85 o Fixed 'kern' table Format 2 implementation.
86 o Implement 'feat' table API for feature detection.
87 o Blacklist 'GSUB' table of fonts from 'MUTF' foundry that also have 'morx'.
90 +hb_aat_layout_feature_type_t
91 +hb_aat_layout_feature_selector_t
92 +hb_aat_layout_get_feature_types()
93 +hb_aat_layout_feature_type_get_name_id
94 +hb_aat_layout_feature_selector_info_t
95 +HB_AAT_LAYOUT_NO_SELECTOR_INDEX
96 +hb_aat_layout_feature_type_get_selector_infos()
97 +hb_ot_var_axis_flags_t
98 +hb_ot_var_axis_info_t
99 +hb_ot_var_get_axis_infos()
100 +hb_ot_var_find_axis_info()
101 +hb_ot_var_get_named_instance_count()
102 +hb_ot_var_named_instance_get_subfamily_name_id()
103 +hb_ot_var_named_instance_get_postscript_name_id()
104 +hb_ot_var_named_instance_get_design_coords()
107 +HB_OT_VAR_NO_AXIS_INDEX
109 +hb_ot_var_get_axes()
110 +hb_ot_var_find_axis()
113 Overview of changes leading to 2.1.3
114 Friday, November 16, 2018
115 ====================================
116 - Fix AAT 'mort' shaping, which was broken in 2.1.2
119 Overview of changes leading to 2.1.2
120 Friday, November 16, 2018
121 ====================================
122 - Various internal changes.
123 - AAT shaping improvements:
124 o Implement kern table Format 1 state-machine-based kerning.
125 o Implement cross-stream kerning (cursive positioning, etc).
126 o Ignore emptyish GSUB tables (zero scripts) if morx present.
127 o Don't apply GPOS if morx is being applied. Matches Apple.
130 -Overview of changes leading to 2.1.1
131 Monday, November 5, 2018
132 ====================================
134 o Implement 'mort' table.
135 o Implement 'kern' subtables Format 1 and Format 3.
138 Overview of changes leading to 2.1.0
139 Tuesday, October 30, 2018
140 ====================================
141 - AAT shaping improvements:
142 o Allow user controlling AAT features, for whole buffer only currently.
143 o Several 'morx' fixes.
144 o Implement tuple-kerns in 'kerx'; Fixes kerning with Apple default
146 - Support for color fonts:
147 o COLR/CPAL API to fetch color layers.
148 o SVG table to fetch SVG documents.
149 o CBDT/sbix API to fetch PNG images.
150 - New 'name' table API.
151 - hb-ot-font now uses 'VORG' table to correctly position CFF glyphs
153 - Various fuzzer-found bug fixes.
157 A type and a macro added in 2.0.0 were renamed:
159 hb_name_id_t -> hb_ot_name_id_t
160 HB_NAME_ID_INVALID -> HB_OT_NAME_ID_INVALID
166 +hb_color_get_alpha()
168 +hb_color_get_green()
170 +hb_ot_color_has_palettes()
171 +hb_ot_color_palette_get_count()
172 +hb_ot_color_palette_get_name_id()
173 +hb_ot_color_palette_color_get_name_id()
174 +hb_ot_color_palette_flags_t
175 +hb_ot_color_palette_get_flags()
176 +hb_ot_color_palette_get_colors()
177 +hb_ot_color_has_layers()
179 +hb_ot_color_glyph_get_layers()
180 +hb_ot_color_has_svg()
181 +hb_ot_color_glyph_reference_svg()
182 +hb_ot_color_has_png()
183 +hb_ot_color_glyph_reference_png()
186 +HB_OT_NAME_ID_INVALID
187 +HB_OT_NAME_ID_COPYRIGHT
188 +HB_OT_NAME_ID_FONT_FAMILY
189 +HB_OT_NAME_ID_FONT_SUBFAMILY
190 +HB_OT_NAME_ID_UNIQUE_ID
191 +HB_OT_NAME_ID_FULL_NAME
192 +HB_OT_NAME_ID_VERSION_STRING
193 +HB_OT_NAME_ID_POSTSCRIPT_NAME
194 +HB_OT_NAME_ID_TRADEMARK
195 +HB_OT_NAME_ID_MANUFACTURER
196 +HB_OT_NAME_ID_DESIGNER
197 +HB_OT_NAME_ID_DESCRIPTION
198 +HB_OT_NAME_ID_VENDOR_URL
199 +HB_OT_NAME_ID_DESIGNER_URL
200 +HB_OT_NAME_ID_LICENSE
201 +HB_OT_NAME_ID_LICENSE_URL
202 +HB_OT_NAME_ID_TYPOGRAPHIC_FAMILY
203 +HB_OT_NAME_ID_TYPOGRAPHIC_SUBFAMILY
204 +HB_OT_NAME_ID_MAC_FULL_NAME
205 +HB_OT_NAME_ID_SAMPLE_TEXT
206 +HB_OT_NAME_ID_CID_FINDFONT_NAME
207 +HB_OT_NAME_ID_WWS_FAMILY
208 +HB_OT_NAME_ID_WWS_SUBFAMILY
209 +HB_OT_NAME_ID_LIGHT_BACKGROUND
210 +HB_OT_NAME_ID_DARK_BACKGROUND
211 +HB_OT_NAME_ID_VARIATIONS_PS_PREFIX
213 +hb_ot_name_list_names()
214 +hb_ot_name_get_utf8()
215 +hb_ot_name_get_utf16()
216 +hb_ot_name_get_utf32()
219 Overview of changes leading to 2.0.2
220 Saturday, October 20, 2018
221 ====================================
222 - Fix two minor memory access issues in AAT tables.
225 Overview of changes leading to 2.0.1
226 Friday, October 19, 2018
227 ====================================
228 - Fix hb-version.h reported release version that went wrong (1.8.0)
229 with previous release.
230 - Fix extrapolation in 'trak' table.
231 - Fix hb-font infinite-recursion issue with some font funcs and
233 - Implement variation-kerning format in kerx table, although without
235 - Fix return value of hb_map_is_empty().
238 Overview of changes leading to 2.0.0
239 Thursday, October 18, 2018
240 ====================================
241 - Added AAT shaping support (morx/kerx/trak).
242 Automatically used if GSUB/GPOS are not available respectively.
243 Set HB_OPTIONS=aat env var to have morx/kerx preferred over
245 - Apply TrueType kern table internally, instead of relying on
247 - Khmer shaper significantly rewritten to better match Uniscribe.
248 - Indic3 tags ('dev3', etc) are passed to USE shaper.
249 - .dfont Mac font containers implemented.
250 - Script- and language-mapping revamped to better use BCP 47.
251 - Misc USE and Indic fixes.
252 - Misc everything fixes.
253 - Too many things to list. Biggest release since 0.9.1, with
254 over 500 commits in just over 5 weeks! Didn't intend it to
255 be a big release. Just happened to become.
256 - hb-ft now locks underlying FT_Face during use.
260 - Newly-created hb_font_t's now have our internal "hb-ot-font"
261 callbacks set on them, so they should work out of the box
262 without any callbacks set. If callbacks are set, everything
263 is back to what it was before, the fallback callbacks are
264 null. If you to get the internal implementation modified,
267 - New hb_font_funcs_set_nominal_glyphs_func() allows speeding
268 up character to glyph mapping.
271 +HB_FEATURE_GLOBAL_START
272 +HB_FEATURE_GLOBAL_END
273 +hb_buffer_set_invisible_glyph()
274 +hb_buffer_get_invisible_glyph()
275 +hb_font_funcs_set_nominal_glyphs_func()
276 +hb_ot_layout_table_select_script()
277 +hb_ot_layout_script_select_language()
278 +hb_ot_layout_feature_get_name_ids()
279 +hb_ot_layout_feature_get_characters()
282 +HB_OT_MAX_TAGS_PER_SCRIPT
283 +hb_ot_tags_from_script_and_language()
284 +hb_ot_tags_to_script_and_language()
287 -hb_font_funcs_set_glyph_func()
288 -hb_unicode_eastasian_width_func_t
289 -hb_unicode_funcs_set_eastasian_width_func()
290 -hb_unicode_eastasian_width()
291 -hb_unicode_decompose_compatibility_func_t
292 -HB_UNICODE_MAX_DECOMPOSITION_LEN
293 -hb_unicode_funcs_set_decompose_compatibility_func()
294 -hb_unicode_decompose_compatibility()
295 -hb_font_funcs_set_glyph_h_kerning_func()
296 -hb_font_funcs_set_glyph_v_kerning_func()
297 -hb_font_get_glyph_h_kerning()
298 -hb_font_get_glyph_v_kerning()
299 -hb_font_get_glyph_kerning_for_direction()
300 -hb_ot_layout_table_choose_script()
301 -hb_ot_layout_script_find_language()
302 -hb_ot_tags_from_script()
303 -hb_ot_tag_from_language()
306 Overview of changes leading to 1.9.0
307 Monday, September 10, 2018
308 ====================================
309 - Added 'cmap' API to hb_face_t.
311 - hb-ot-font re-creation should be much leaner now, as the
312 font tables it uses are cached on hb_face_t now.
313 - Internal source header file name changes:
314 hb-*-private.hh is renamed to hb-*.hh.
318 +hb_face_collect_unicodes()
319 +hb_face_collect_variation_selectors()
320 +hb_face_collect_variation_unicodes()
321 +hb_face_builder_create()
322 +hb_face_builder_add_table()
325 Overview of changes leading to 1.8.8
326 Tuesday, August 14, 2018
327 ====================================
328 - Fix hb-icu crash on architectures where compare_exchange_weak() can
329 fail falsely. This bug was introduced in 1.8.4.
330 https://bugs.chromium.org/p/chromium/issues/detail?id=873568
331 - More internal refactoring of atomic operations and singletons.
333 The following functions do NOT reference their return value before
335 * hb_unicode_funcs_get_default()
336 * hb_glib_get_unicode_funcs()
337 * hb_icu_get_unicode_funcs()
338 This is consistent with their naming ("get", instead of "reference")
339 as well as how they are used in the wild (ie. no one calls destroy()
340 on their return value.)
343 Overview of changes leading to 1.8.7
344 Wednesday, August 8, 2018
345 ====================================
346 - Fix assertion failure with GDEF-blacklisted fonts.
349 Overview of changes leading to 1.8.6
350 Tuesday, August 7, 2018
351 ====================================
352 - Internal code shuffling.
353 - New API to speed up getting advance widths for implementations
354 that have heavy overhead in get_h_advance callback:
355 +hb_font_funcs_set_glyph_h_advances_func
356 +hb_font_funcs_set_glyph_v_advances_func
357 +hb_font_get_glyph_advances_for_direction
358 +hb_font_get_glyph_h_advances
359 +hb_font_get_glyph_h_advances_func_t
360 +hb_font_get_glyph_v_advances
361 +hb_font_get_glyph_v_advances_func_t
364 Overview of changes leading to 1.8.5
365 Wednesday, August 1, 2018
366 ====================================
367 - Major Khmer shaper improvements to better match Microsoft.
369 - Internal improvements to atomic operations.
372 Overview of changes leading to 1.8.4
373 Tuesday, July 17, 2018
374 ====================================
375 - Fix build on non-C++11.
376 - Use C++-style GCC atomics and C++11 atomics.
379 Overview of changes leading to 1.8.3
380 Wednesday, July 11, 2018
381 ====================================
382 - A couple of Indic / USE bug fixes.
383 - Disable vectorization, as it was causing unaligned access bus error on
384 certain 32bit architectures.
387 Overview of changes leading to 1.8.2
388 Tuesday, July 3, 2018
389 ====================================
390 - Fix infinite loop in Khmer shaper.
391 - Improve hb_blob_create_from_file() for streams.
394 Overview of changes leading to 1.8.1
395 Tuesday, June 12, 2018
396 ====================================
397 - Fix hb-version.h file generation; last two releases went out with wrong ones.
398 - Add correctness bug in hb_set_t operations, introduced in 1.7.7.
399 - Remove HB_SUBSET_BUILTIN build option. Not necessary.
402 Overview of changes leading to 1.8.0
403 Tuesday, June 5, 2018
404 ====================================
405 - Update to Unicode 11.0.0.
408 Overview of changes leading to 1.7.7
409 Tuesday, June 5, 2018
410 ====================================
411 - Lots of internal changes, but not yet exposed externally.
412 - All HarfBuzz objects are significantly smaller in size now.
413 - Sinhala: Position repha on top of post-consonant, not base.
414 This better matches Windows 10 behavior, which was changed
415 from previous Windows versions.
417 o New cpp macro HB_NO_ATEXIT
418 o New cpp macro HB_SUBSET_BUILTIN
419 - Significant libharfbuzz-subset changes. API subject to change.
420 - New API in libharfbuzz:
422 +hb_blob_create_from_file()
425 A hashmap implementation:
427 +HB_MAP_VALUE_INVALID
433 +hb_map_set_user_data()
434 +hb_map_get_user_data()
435 +hb_map_allocation_successful()
438 +hb_map_get_population()
445 Overview of changes leading to 1.7.6
446 Wednesday, March 7, 2018
447 ====================================
449 - Fix to hb_set_t binary operations. Ouch.
450 - New experimental harfbuzz-subset library. All of hb-subset.h
451 is experimental right now and API WILL change.
454 hb_blob_copy_writable_or_fail()
457 hb_set_previous_range()
460 Overview of changes leading to 1.7.5
461 Tuesday, January 30, 2018
462 ====================================
464 - Separate Khmer shaper from Indic.
465 - First stab at AAT morx. Not hooked up.
469 Overview of changes leading to 1.7.4
470 Wednesday, December 20, 2017
471 ====================================
473 - Fix collect_glyphs() regression caused by hb_set_t changes.
476 Overview of changes leading to 1.7.3
477 Monday, December 18, 2017
478 ====================================
480 - hb_set_t performance tuning and optimizations.
481 - Speed up collect_glyphs() and reject garbage data.
482 - In hb_coretext_font_create() set font point-size (ptem).
486 Overview of changes leading to 1.7.2
487 Monday, December 4, 2017
488 ====================================
490 - Optimize hb_set_add_range().
493 hb_coretext_font_create()
496 Overview of changes leading to 1.7.1
497 Tuesday, November 14, 2017
498 ====================================
500 - Fix atexit object destruction regression.
501 - Fix minor integer-overflow.
504 Overview of changes leading to 1.7.0
505 Monday, November 13, 2017
506 ====================================
509 - Implement kerning and glyph names in hb-ot-font.
510 - Various DSO optimization re .data and .bss sizes.
511 - Make C++11 optional; build fixes.
512 - Mark all other backends "unsafe-to-break".
516 Overview of changes leading to 1.6.3
517 Thursday, October 26th, 2017
518 ====================================
520 - Fix hb_set_t some more. Should be solid now.
521 - Implement get_glyph_name() for hb-ot-font.
525 Overview of changes leading to 1.6.2
526 Monday, October 23nd, 2017
527 ====================================
529 - Yesterday's release had a bad crasher; don't use it. That's what
530 happens when one works on Sunday...
531 https://github.com/harfbuzz/harfbuzz/issues/578
532 - Build fixes for FreeBSD and Chrome Android.
535 Overview of changes leading to 1.6.1
536 Sunday, October 22nd, 2017
537 ====================================
539 - Don't skip over COMBINING GRAPHEME JOINER when ligating, etc.
540 To be refined: https://github.com/harfbuzz/harfbuzz/issues/554
541 - Faster hb_set_t implementation.
542 - Don't use deprecated ICU API.
543 - Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0
548 Overview of changes leading to 1.6.0
549 Friday, October the 13th, 2017
550 ====================================
552 - Update to Unicode 10.
554 - Various Indic and Universal Shaping Engine fixes as a result of
555 HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at
556 the Igalia offices in A Coruña, Spain. Thanks Igalia for having
559 - Implement Unicode Arabic Mark Ordering Algorithm UTR#53.
561 - Implement optical sizing / tracking in CoreText backend, using
562 new API hb_font_set_ptem().
564 - Allow notifying hb_font_t that underlying FT_Face changed sizing,
565 using new API hb_ft_font_changed().
567 - More Graphite backend RTL fixes.
569 - Fix caching of variable font shaping plans.
571 - hb-view / hb-shape now accept following new arguments:
573 o --unicodes: takes a list of hex numbers that represent Unicode
577 +hb_face_get_table_tags()
580 +hb_ft_font_changed()
583 Overview of changes leading to 1.5.1
584 Tuesday, September 5, 2017
585 ====================================
587 - Fix "unsafe-to-break" in fallback shaping and other corner cases.
588 All our tests pass with --verify now, meaning unsafe-to-break API
590 - Add --unicodes to hb-view / hb-shape.
591 - [indic] Treat Consonant_With_Stacker as consonant. This will need
593 - hb_buffer_diff() tweaks.
596 Overview of changes leading to 1.5.0
597 Wednesday, August 23, 2017
598 ====================================
600 - Misc new API, for appending a buffer to another, and for comparing
601 contents of two buffers for types of differences.
603 - New "unsafe-to-break" API. Can be used to speed up reshaping
604 in line-breaking situations. Essentially, after shaping, it returns
605 positions in the input string (some of the cluster boundaries) that
606 are "safe to break" in that if the text is segmented at that position
607 and two sides reshaped and concatenated, the shaping result is
608 exactly the same as shaping the text in one piece.
610 hb-view and hb-shape and hb-shape now take --verify, which verifies
613 Some corner cases of the implementation are still not quite working.
614 Those will be fixed in subsequent releases.
621 HB_GLYPH_FLAG_UNSAFE_TO_BREAK
622 HB_GLYPH_FLAG_DEFINED
623 hb_glyph_info_get_glyph_flags()
625 HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS
627 hb_buffer_diff_flags_t
628 HB_BUFFER_DIFF_FLAG_EQUAL
629 HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH
630 HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH
631 HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT
632 HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT
633 HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH
634 HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH
635 HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH
636 HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH
640 Overview of changes leading to 1.4.8
641 Tuesday, August 8, 2017
642 ====================================
644 - Major fix to avar table handling.
645 - Rename hb-shape --show-message to --trace.
649 Overview of changes leading to 1.4.7
650 Tuesday, July 18, 2017
651 ====================================
653 - Multiple Indic, Tibetan, and Cham fixes.
654 - CoreText: Allow disabling kerning.
655 - Adjust Arabic feature order again.
659 Overview of changes leading to 1.4.6
660 Sunday, April 23, 2017
661 ====================================
663 - Graphite2: Fix RTL positioning issue.
664 - Backlist GDEF of more versions of Padauk and Tahoma.
665 - New, experimental, cmake alternative build system.
668 Overview of changes leading to 1.4.5
669 Friday, March 10, 2017
670 ====================================
672 - Revert "Fix Context lookup application when moving back after a glyph..."
673 This introduced memory access problems. To be fixed properly soon.
676 Overview of changes leading to 1.4.4
677 Sunday, March 5, 2017
678 ====================================
680 - Fix Context lookup application when moving back after a glyph deletion.
681 - Fix buffer-overrun in Bengali.
684 Overview of changes leading to 1.4.3
685 Saturday, February 25, 2017
686 ====================================
688 - Route Adlam script to Arabic shaper.
693 hb_graphite2_font_get_gr_font()
696 Overview of changes leading to 1.4.2
697 Monday, January 23, 2017
698 ====================================
700 - Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR.
701 - hb-shape and hb-view now accept --variations.
705 hb_variation_from_string()
706 hb_variation_to_string()
708 hb_font_set_variations()
709 hb_font_set_var_coords_design()
710 hb_font_get_var_coords_normalized()
715 hb_ot_var_get_axis_count()
717 hb_ot_var_find_axis()
718 hb_ot_var_normalize_variations()
719 hb_ot_var_normalize_coords()
721 - MVAR to be implemented later. Access to named instances to be
722 implemented later as well.
727 Overview of changes leading to 1.4.1
728 Thursday, January 5, 2017
729 ====================================
731 - Always build and use UCDN for Unicode data by default.
732 Reduces dependence on version of Unicode data in glib,
733 specially in the Windows bundles we are shipping, which
737 Overview of changes leading to 1.4.0
738 Thursday, January 5, 2017
739 ====================================
741 - Merged "OpenType GX" branch which adds core of support for
742 OpenType 1.8 Font Variations. To that extent, the relevant
746 hb_font_set_var_coords_normalized()
751 HB_OT_LAYOUT_NO_VARIATIONS_INDEX
752 hb_ot_layout_table_find_feature_variations()
753 hb_ot_layout_feature_with_variations_get_lookups()
754 hb_shape_plan_create2()
755 hb_shape_plan_create_cached2()
757 Currently variations in GSUB/GPOS/GDEF are fully supported,
758 and no other tables are supported. In particular, fvar/avar
759 are NOT supported, hence the hb_font_set_var_coords_normalized()
760 taking normalized coordinates. API to take design coordinates
761 will be added in the future.
763 HVAR/VVAR/MVAR support will also be added to hb-ot-font in the
766 - Fix regression in GDEF glyph class processing.
767 - Add decompositions for Chakma, Limbu, and Balinese in USE shaper.
771 Overview of changes leading to 1.3.4
772 Monday, December 5, 2016
773 ====================================
775 - Fix vertical glyph origin in hb-ot-font.
776 - Implement CBDT/CBLC color font glyph extents in hb-ot-font.
779 Overview of changes leading to 1.3.3
780 Wednesday, September 28, 2016
781 ====================================
783 - Implement parsing of OpenType MATH table.
787 hb_ot_math_constant_t
789 hb_ot_math_glyph_variant_t
790 hb_ot_math_glyph_part_flags_t
791 hb_ot_math_glyph_part_t
793 hb_ot_math_get_constant
794 hb_ot_math_get_glyph_italics_correction
795 hb_ot_math_get_glyph_top_accent_attachment
796 hb_ot_math_get_glyph_kerning
797 hb_ot_math_is_glyph_extended_shape
798 hb_ot_math_get_glyph_variants
799 hb_ot_math_get_min_connector_overlap
800 hb_ot_math_get_glyph_assembly
803 Overview of changes leading to 1.3.2
804 Wednesday, September 27, 2016
805 ====================================
807 - Fix build of hb-coretext on older OS X versions.
810 Overview of changes leading to 1.3.1
811 Wednesday, September 7, 2016
812 ====================================
814 - Blacklist bad GDEF of more fonts (Padauk).
815 - More CoreText backend crash fixes with OS X 10.9.5.
819 Overview of changes leading to 1.3.0
820 Thursday, July 21, 2016
821 ====================================
823 - Update to Unicode 9.0.0
824 - Move Javanese from Indic shaper to Universal Shaping Engine.
825 - Allow MultipleSubst to delete a glyph (matching Windows engine).
826 - Update Universal Shaping Engine to latest draft from Microsoft.
827 - DirectWrite backend improvements. Note: this backend is for testing ONLY.
828 - CoreText backend improvements with unreachable fonts.
829 - Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font.
830 - Blacklist bad GDEF of more fonts (Tahoma & others).
834 Overview of changes leading to 1.2.7
836 ====================================
838 - Blacklist another version of Times New Roman (Bold) Italic from Windows 7.
839 - Fix Mongolian Free Variation Selectors shaping with certain fonts.
840 - Fix Tibetan shorthand contractions shaping.
841 - Improved list of language tag mappings.
842 - Unbreak build on Windows CE.
843 - Make 'glyf' table loading lazy in hb-ot-font.
846 Overview of changes leading to 1.2.6
847 Friday, April 8, 2016
848 ====================================
850 - Blacklist GDEF table of another set of Times New Roman (Bold) Italic.
851 - DirectWrite backend improvements. Note: DirectWrite backend is
852 exclusively for our internal testing and should NOT be used in any
853 production system whatsoever.
856 Overview of changes leading to 1.2.5
857 Monday, April 4, 2016
858 ====================================
860 - Fix GDEF mark-filtering-set, which was broken in 1.2.3.
863 Overview of changes leading to 1.2.4
864 Thursday, March 17, 2016
865 ====================================
867 - Synthesize GDEF glyph class for any glyph that does not have one in GDEF.
868 I really hope we don't discover broken fonts that shape badly with this
870 - Misc build and other minor fixes.
872 - Added HB_NDEBUG. It's fine for production systems to define this to
873 disable high-overhead debugging checks. However, I also reduced the
874 overhead of those checks, so it's a non-issue right now. You can
875 forget it. Just not defining anything at all is fine.
878 Overview of changes leading to 1.2.3
879 Thursday, February 25, 2016
880 ====================================
882 - Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic,
883 due to bug in glyph class of ASCII double-quote character. This should
884 address "regression" introduced in 1.2.0 when we switched mark zeroing
885 in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE.
886 This fourth release in a week should finally stablize things...
888 - hb-ot-font's get_glyph() implementation saw some optimizations. Though,
889 might be really hard to measure in real-world situations.
891 - Also, two rather small API changes:
893 We now disable some time-consuming internal bookkeeping if built with NDEBUG
894 defined. This is a first time that we use NDEBUG to disable debug code. If
895 there exist production systems that do NOT want to enable NDEBUG, please let
896 me know and I'll add HB_NDEBUG.
898 Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph()
901 - hb_font_get_nominal_glyph_func_t
902 - hb_font_get_variation_glyph_func_t
903 - hb_font_funcs_set_nominal_glyph_func()
904 - hb_font_funcs_set_variation_glyph_func()
905 - hb_font_get_nominal_glyph()
906 - hb_font_get_variation_glyph()
909 - hb_font_get_glyph_func_t
910 - hb_font_funcs_set_glyph_func()
912 Clients that implement their own font-funcs are encouraged to replace
913 their get_glyph() implementation with a get_nominal_glyph() and
914 get_variation_glyph() pair. The variation version can assume that
915 variation_selector argument is not zero. Old (deprecated) functions
916 will continue working indefinitely using internal gymnastics; it is
917 just more efficient to use the new functions.
920 Overview of changes leading to 1.2.2
921 Wednesday, February 24, 2016
922 ====================================
924 - Fix regression with mark positioning with fonts that have
925 non-zero mark advances. This was introduced in 1.2.0 while
926 trying to make mark and cursive attachments to work together.
927 I have partially reverted that, so this version is much more
928 like what we had before. All clients who updated to 1.2.0
929 should update to this version.
932 Overview of changes leading to 1.2.1
933 Tuesday, February 23, 2016
934 ====================================
936 - CoreText: Fix bug with wrong scale if font scale was changed later.
937 https://github.com/libass/libass/issues/212
938 - CoreText: Drastically speed up font initialization.
939 - CoreText: Fix tiny leak.
940 - Group ZWJ/ZWNJ with previous syllable under cluster-level=0.
941 https://github.com/harfbuzz/harfbuzz/issues/217
942 - Add test/shaping/README.md about how to add tests to the suite.
945 Overview of changes leading to 1.2.0
946 Friday, February 19, 2016
947 ====================================
949 - Fix various issues (hangs mostly) in case of memory allocation failure.
950 - Change mark zeroing types of most shapers from BY_UNICODE_LATE to
951 BY_GDEF_LATE. This seems to be what Uniscribe does.
952 - Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's
954 - Allow GPOS cursive connection on marks, and fix the interaction with
955 mark attachment. This work resulted in some changes to how mark
956 attachments work. See:
957 https://github.com/harfbuzz/harfbuzz/issues/211
958 https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2
959 - Graphite2 shaper: improved negative advance handling (eg. Nastaliq).
960 - Add nmake-based build system for Windows.
962 - Misc. improvements.
965 Overview of changes leading to 1.1.3
966 Monday, January 11, 2016
967 ====================================
969 - Ported Indic shaper to Unicode 8.0 data.
970 - Universal Shaping Engine fixes.
971 - Speed up CoreText shaper when font fallback happens in CoreText.
972 - Documentation improvements, thanks to Khaled Hosny.
973 - Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi.
979 hb_font_get_font_extents_func_t
980 hb_font_get_font_h_extents_func_t
981 hb_font_get_font_v_extents_func_t
982 hb_font_funcs_set_font_h_extents_func
983 hb_font_funcs_set_font_v_extents_func
984 hb_font_get_h_extents
985 hb_font_get_v_extents
986 hb_font_get_extents_for_direction
988 * Buffer message (aka debug):
989 hb_buffer_message_func_t
990 hb_buffer_set_message_func()
991 Actual message protocol to be fleshed out later.
994 Overview of changes leading to 1.1.2
995 Wednesday, November 26, 2015
996 ====================================
998 - Fix badly-broken fallback shaper that affected terminology.
999 https://github.com/harfbuzz/harfbuzz/issues/187
1000 - Fix y_scaling in Graphite shaper.
1002 * An unset glyph_h_origin() function in font-funcs now (sensibly)
1003 implies horizontal origin at 0,0. Ie, the nil callback returns
1004 true instead of false. As such, implementations that have a
1005 glyph_h_origin() that simply returns true, can remove that function
1006 with HarfBuzz >= 1.1.2. This results in a tiny speedup.
1009 Overview of changes leading to 1.1.1
1010 Wednesday, November 24, 2015
1011 ====================================
1013 - Build fixes, specially for hb-coretext.
1016 Overview of changes leading to 1.1.0
1017 Wednesday, November 18, 2015
1018 ====================================
1020 - Implement 'stch' stretch feature for Syriac Abbreviation Mark.
1021 https://github.com/harfbuzz/harfbuzz/issues/141
1022 - Disable use of decompose_compatibility() callback.
1023 - Implement "shaping" of various Unicode space characters, even
1024 if the font does not support them.
1025 https://github.com/harfbuzz/harfbuzz/issues/153
1026 - If font does not support U+2011 NO-BREAK HYPHEN, fallback to
1028 - Changes resulting from libFuzzer continuous fuzzing:
1029 * Reject font tables that need more than 8 edits,
1030 * Bound buffer growth during shaping to 32x,
1031 * Fix assertions and other issues at OOM / buffer max-growth.
1032 - Misc fixes and optimizations.
1034 * All fonts created with hb_font_create() now inherit from
1035 (ie. have parent) hb_font_get_empty().
1038 Overview of changes leading to 1.0.6
1039 Thursday, October 15, 2015
1040 ====================================
1042 - Reduce max nesting level in OT lookups from 8 to 6.
1043 Should not affect any real font as far as I know.
1044 - Fix memory access issue in ot-font.
1045 - Revert default load-flags of fonts created using hb_ft_font_create()
1046 back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in
1047 last release (1.0.5), but caused major issues, so revert.
1048 https://github.com/harfbuzz/harfbuzz/issues/143
1051 Overview of changes leading to 1.0.5
1052 Tuesday, October 13, 2015
1053 ====================================
1055 - Fix multiple memory access bugs discovered using libFuzzer.
1056 https://github.com/harfbuzz/harfbuzz/issues/139
1057 Everyone should upgrade to this version as soon as possible.
1058 We now have continuous fuzzing set up, to avoid issues like
1059 these creeping in again.
1063 * hb_font_set_parent().
1064 * hb_ft_font_[sg]et_load_flags()
1065 The default flags for fonts created using hb_ft_font_create()
1066 has changed to default to FT_LOAD_DEFAULT now. Previously it
1067 was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING.
1070 * Fonts now default to units-per-EM as their scale, instead of 0.
1071 * hb_font_create_sub_font() does NOT make parent font immutable
1072 anymore. hb_font_make_immutable() does.
1075 Overview of changes leading to 1.0.4
1076 Wednesday, September 30, 2015
1077 ====================================
1079 - Fix minor out-of-bounds read error.
1082 Overview of changes leading to 1.0.3
1083 Tuesday, September 1, 2015
1084 ====================================
1086 - Start of user documentation, from Simon Cozens!
1087 - Implement glyph_extents() for TrueType fonts in hb-ot-font.
1088 - Improve GPOS cursive attachments with conflicting lookups.
1089 - More fixes for cluster-level = 1.
1090 - Uniscribe positioning fix.
1093 Overview of changes leading to 1.0.2
1094 Wednesday, August 19, 2015
1095 ====================================
1097 - Fix shaping with cluster-level > 0.
1098 - Fix Uniscribe backend font-size scaling.
1099 - Declare dependencies in harfbuzz.pc.
1100 FreeType is not declared though, to avoid bugs in pkg-config
1101 0.26 with recursive dependencies.
1102 - Slightly improved debug infrastructure. More to come later.
1106 Overview of changes leading to 1.0.1
1107 Monday, July 27, 2015
1108 ====================================
1110 - Fix out-of-bounds access in USE shaper.
1113 Overview of changes leading to 1.0.0
1114 Sunday, July 26, 2015
1115 ====================================
1117 - Implement Universal Shaping Engine:
1118 https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm
1119 http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/
1120 - Bump version to 1.0.0. The soname was NOT bumped.
1123 Overview of changes leading to 0.9.42
1124 Thursday, July 26, 2015
1125 =====================================
1127 - New API to allow for retrieving finer-grained cluster
1128 mappings if the client desires to handle them. Default
1129 behavior is unchanged.
1130 - Fix cluster merging when removing default-ignorables.
1131 - Update to Unicode 8.0
1132 - hb-graphite2 fixes.
1134 - Removed HB_NO_MERGE_CLUSTERS hack.
1136 hb_buffer_cluster_level_t enum
1137 hb_buffer_get_cluster_level()
1138 hb_buffer_set_cluster_level()
1139 hb-shape / hb-view --cluster-level
1142 Overview of changes leading to 0.9.41
1143 Thursday, June 18, 2015
1144 =====================================
1146 - Fix hb-coretext with trailing whitespace in right-to-left.
1147 - New API: hb_buffer_reverse_range().
1148 - Allow implementing atomic ops in config.h.
1149 - Fix hb_language_t in language bindings.
1153 Overview of changes leading to 0.9.40
1154 Friday, March 20, 2015
1155 =====================================
1157 - Another hb-coretext crasher fix. Ouch!
1161 Overview of changes leading to 0.9.39
1162 Wednesday, March 4, 2015
1163 =====================================
1165 - Critical hb-coretext fixes.
1166 - Optimizations and refactoring; no functional change
1171 Overview of changes leading to 0.9.38
1172 Friday, January 23, 2015
1173 =====================================
1175 - Fix minor out-of-bounds access in Indic shaper.
1176 - Change New Tai Lue shaping engine from South-East Asian to default,
1177 reflecting change in Unicode encoding model.
1178 - Add hb-shape --font-size. Can take up to two numbers for separate
1180 - Fix CoreText and FreeType scale issues with negative scales.
1181 - Reject blobs larger than 2GB. This might break some icu-le-hb clients
1182 that need security fixes. See:
1183 http://www.icu-project.org/trac/ticket/11450
1184 - Avoid accessing font tables during face destruction, in casce rogue
1185 clients released face data already.
1186 - Fix up gobject-introspection a bit. Python bindings kinda working.
1190 hb_ft_face_create_referenced()
1191 hb_ft_font_create_referenced()
1194 Overview of changes leading to 0.9.37
1195 Wednesday, December 17, 2014
1196 =====================================
1198 - Fix out-of-bounds access in Context lookup format 3.
1199 - Indic: Allow ZWJ/ZWNJ before syllable modifiers.
1202 Overview of changes leading to 0.9.36
1203 Thursday, November 20, 2014
1204 =====================================
1206 - First time that three months went by without a release since
1207 0.9.2 was released on August 10, 2012!
1208 - Fix performance bug in hb_ot_collect_glyphs():
1209 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869
1210 - Add basic vertical-text support to hb-ot-font.
1214 Overview of changes leading to 0.9.35
1215 Saturday, August 13, 2014
1216 =====================================
1218 - Fix major shape-plan caching bug when more than one shaper were
1219 provided to hb_shape_full() (as exercised by XeTeX).
1220 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
1221 - Fix Arabic fallback shaping regression. This was broken in 0.9.32.
1222 - Major hb-coretext fixes. That backend is complete now, including
1223 respecing buffer direction and language, down to vertical writing.
1224 - Build fixes for Windows CE. Should build fine now.
1226 Use atexit() only if it's safe to call from shared library
1227 https://bugs.freedesktop.org/show_bug.cgi?id=82246
1228 Mandaic had errors in its Unicode Joining_Type
1229 https://bugs.freedesktop.org/show_bug.cgi?id=82306
1232 * hb_buffer_clear_contents() does not reset buffer flags now.
1234 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
1235 need to set flags for different pieces of text. The flags now
1236 are something the client sets up once, depending on how it
1237 actually uses the buffer. As such, don't clear it in
1240 I don't expect any changes to be needed to any existing client.
1243 Overview of changes leading to 0.9.34
1244 Saturday, August 2, 2014
1245 =====================================
1247 - hb_feature_from_string() now accepts CSS font-feature-settings format.
1248 - As a result, hb-shape / hb-view --features also accept CSS-style strings.
1249 Eg, "'liga' off" is accepted now.
1250 - Add old-spec Myanmar shaper:
1251 https://bugs.freedesktop.org/show_bug.cgi?id=81775
1252 - Don't apply 'calt' in Hangul shaper.
1253 - Fix mark advance zeroing for Hebrew shaper:
1254 https://bugs.freedesktop.org/show_bug.cgi?id=76767
1255 - Implement Windows-1256 custom Arabic shaping. Only built on Windows,
1256 and requires help from get_glyph(). Used by Firefox.
1257 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
1258 - Disable 'liga' in vertical text.
1262 * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
1264 Previously, we expected users to provide BOT/EOT flags when the
1265 text *segment* was at paragraph boundaries. This meant that for
1266 clients that provide full paragraph to HarfBuzz (eg. Pango), they
1269 hb_buffer_set_flags (hb_buffer,
1270 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
1271 (item_offset + item_length == paragraph_length ?
1272 HB_BUFFER_FLAG_EOT : 0));
1274 hb_buffer_add_utf8 (hb_buffer,
1275 paragraph_text, paragraph_length,
1276 item_offset, item_length);
1278 After this change such clients can simply say:
1280 hb_buffer_set_flags (hb_buffer,
1281 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
1283 hb_buffer_add_utf8 (hb_buffer,
1284 paragraph_text, paragraph_length,
1285 item_offset, item_length);
1287 Ie, HarfBuzz itself checks whether the segment is at the beginning/end
1288 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
1289 continue not setting any flags whatsoever.
1291 Another way to put it is: if there's pre-context text in the buffer,
1292 HarfBuzz ignores the BOT flag. If there's post-context, it ignores
1296 Overview of changes leading to 0.9.33
1297 Tuesday, July 22, 2014
1298 =====================================
1300 - Turn off ARabic 'cswh' feature that was accidentally turned on.
1301 - Add HB_TAG_MAX_SIGNED.
1302 - Make hb_face_make_immutable() really make face immutable!
1303 - Windows build fixes.
1306 Overview of changes leading to 0.9.32
1307 Thursday, July 17, 2014
1308 =====================================
1310 - Apply Arabic shaping features in spec order exactly.
1311 - Another fix for Mongolian free variation selectors.
1312 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
1314 - Minor adjustment to U+FFFD logic.
1315 - Fix hb-coretext build.
1318 Overview of changes leading to 0.9.31
1319 Wednesday, July 16, 2014
1320 =====================================
1322 - Only accept valid UTF-8/16/32; we missed many cases before.
1323 - Better shaping of invalid UTF-8/16/32. Falls back to
1324 U+FFFD REPLACEMENT CHARACTER now.
1325 - With all changes in this release, the buffer will contain fully
1326 valid Unicode after hb_buffer_add_utf8/16/32 no matter how
1327 broken the input is. This can be overridden though. See below.
1328 - Fix Mongolian Variation Selectors for fonts without GDEF.
1329 - Fix minor invalid buffer access.
1330 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language()
1331 now uses these instead of private tags.
1334 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
1335 used to do, ie. no validity check on the input at all. add_utf32
1336 now replaces invalid Unicode codepoints with the replacement
1337 character (see below).
1338 * hb_buffer_set_replacement_codepoint()
1339 * hb_buffer_get_replacement_codepoint()
1340 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
1341 we detected broken input, we replaced that with (hb_codepoint_t)-1.
1342 This has changed to use U+FFFD now, but can be changed using these
1346 Overview of changes leading to 0.9.30
1347 Wednesday, July 9, 2014
1348 =====================================
1350 - Update to Unicode 7.0.0:
1351 * New scripts Manichaean and Psalter Pahlavi are shaped using
1353 * All the other new scripts to through the generic shaper for
1355 - Minor Indic improvements.
1356 - Fix graphite2 backend cluster mapping [crasher!]
1358 * New HB_SCRIPT_* values for Unicode 7.0 scripts.
1359 * New function hb_ot_layout_language_get_required_feature().
1363 Overview of changes leading to 0.9.29
1364 Thursday, May 29, 2014
1365 =====================================
1367 - Implement cmap in hb-ot-font.h. No variation-selectors yet.
1368 - Myanmar: Allow MedialYa+Asat.
1369 - Various Indic fixes:
1370 * Support most characters in Extended Devanagary and Vedic
1372 * Allow digits and a some punctuation as consonant placeholders.
1376 Overview of changes leading to 0.9.28
1377 Monday, April 28, 2014
1378 =====================================
1380 - Unbreak old-spec Indic shaping. (bug 76705)
1381 - Fix shaping of U+17DD and U+0FC6.
1382 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
1383 for shipping libraries. It's an option for further experimentation
1384 right now. When we are sure how to do it properly, we will add
1385 public run-time API for the functionality.
1389 Overview of changes leading to 0.9.27
1390 Tuesday, March 18, 2014
1391 =====================================
1393 - Don't use "register" storage class specifier
1394 - Wrap definition of free_langs() with HAVE_ATEXIT
1395 - Add coretext_aat shaper and hb_coretext_face_create() constructor
1396 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
1397 - Add Myanmar test case from OpenType Myanmar spec
1398 - Only do fallback Hebrew composition if no GPOS 'mark' available
1399 - Allow bootstrapping without gtk-doc
1400 - Use AM_MISSING_PROG for ragel and git
1401 - Typo in ucdn's Makefile.am
1402 - Improve MemoryBarrier() implementation
1405 Overview of changes leading to 0.9.26
1406 Thursday, January 30, 2014
1407 =====================================
1410 - Fix application of 'rtlm' feature.
1411 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
1412 - New header: hb-ot-shape.h
1413 - Uniscribe: fix scratch-buffer accounting.
1414 - Reorder Tai Tham SAKOT to after tone-marks.
1415 - Add Hangul shaper.
1417 hb-ot-shape-complex-hangul.cc
1418 hb-ot-shape-complex-hebrew.cc
1419 hb-ot-shape-complex-tibetan.cc
1420 - Disable 'cswh' feature in Arabic shaper.
1421 - Coretext: better handle surrogate pairs.
1422 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
1425 Overview of changes leading to 0.9.25
1426 Wednesday, December 4, 2013
1427 =====================================
1429 - Myanmar shaper improvements.
1430 - Avoid font fallback in CoreText backend.
1431 - Additional OpenType language tag mappiongs.
1432 - More aggressive shape-plan caching.
1433 - Build with / require automake 1.13.
1434 - Build with libtool 2.4.2.418 alpha to support ppc64le.
1437 Overview of changes leading to 0.9.24
1438 Tuesday, November 13, 2013
1439 =====================================
1441 - Misc compiler warning fixes with clang.
1442 - No functional changes.
1445 Overview of changes leading to 0.9.23
1446 Monday, October 28, 2013
1447 =====================================
1449 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
1450 - Fix (Chain)Context recursion with non-monotone lookup positions.
1451 - Misc Indic bug fixes.
1452 - New Javanese / Buginese shaping, similar to Windows 8.1.
1455 Overview of changes leading to 0.9.22
1456 Thursday, October 3, 2013
1457 =====================================
1459 - Fix use-after-end-of-scope in hb_language_from_string().
1460 - Fix hiding of default_ignorables if font doesn't have space glyph.
1461 - Protect against out-of-range lookup indices.
1465 * Added hb_ot_layout_table_get_lookup_count()
1468 Overview of changes leading to 0.9.21
1469 Monday, September 16, 2013
1470 =====================================
1472 - Rename gobject-introspection library name from harfbuzz to HarfBuzz.
1473 - Remove (long disabled) hb-old and hb-icu-le test shapers.
1474 - Misc gtk-doc and gobject-introspection annotations.
1478 * Add HB_SET_VALUE_INVALID
1480 Overview of changes leading to 0.9.20
1481 Thursday, August 29, 2013
1482 =====================================
1485 - Misc substitute_closure() fixes.
1489 - gtk-doc boilerplate integrated. Docs are built now, but
1490 contain no contents. By next release hopefully we have
1491 some content in. Enable using --enable-gtk-doc.
1493 GObject and Introspection:
1494 - Added harfbuzz-gobject library (hb-gobject.h) that has type
1495 bindings for all HarfBuzz objects and enums. Enable using
1497 - Added gobject-introspection boilerplate. Nothing useful
1498 right now. Work in progress. Gets enabled automatically if
1499 --with-gobject is used. Override with --disable-introspection.
1502 - Apply 'mark' in Myanmar shaper.
1503 - Don't apply 'dlig' by default.
1506 - Support user features.
1507 - Fix loading of fonts that are also installed on the system.
1508 - Fix shaping of Arabic Presentation Forms.
1509 - Fix build with wide chars.
1512 - Support user features.
1515 - hb_face_t code moved to hb-face.h / hb-face.cc.
1516 - Added hb-deprecated.h.
1519 - Added HB_DISABLE_DEPRECATED.
1520 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
1521 HB_SCRIPT_CANADIAN_SYLLABICS.
1522 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
1523 HB_BUFFER_FLAG_DEFAULT.
1524 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
1525 HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
1528 Overview of changes leading to 0.9.19
1529 Tuesday, July 16, 2013
1530 =====================================
1533 - Better handling of multiple variation selectors in a row.
1534 - Pass on variation selector to GSUB if not consumed by cmap.
1535 - Fix undefined memory access.
1536 - Add Javanese config to Indic shaper.
1539 Overview of changes leading to 0.9.18
1540 Tuesday, May 28, 2013
1541 =====================================
1545 - All unneeded code is all disabled by default,
1547 - Uniscribe and CoreText shapers can be enabled with their --with options,
1549 - icu_le and old shapers cannot be enabled for now,
1551 - glib, freetype, and cairo will be detected automatically.
1552 They can be force on/off'ed with their --with options,
1554 - icu and graphite2 are default off, can be enabled with their --with
1557 Moreover, ICU support is now build into a separate library:
1558 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
1559 Distros can enable ICU now without every application on earth
1560 getting linked to via libharfbuzz.so.
1562 For distros I recommend that they make sure they are building --with-glib
1563 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
1564 And package harfbuzz and harfbuzz-icu separately.
1567 Overview of changes leading to 0.9.17
1568 Monday, May 20, 2013
1569 =====================================
1572 - Fix bug in hb_set_get_min().
1573 - Fix regression with Arabic mark positioning / width-zeroing.
1575 Overview of changes leading to 0.9.16
1576 Friday, April 19, 2013
1577 =====================================
1579 - Major speedup in OpenType lookup processing. With the Amiri
1580 Arabic font, this release is over 3x faster than previous
1581 release. All scripts / languages should see this speedup.
1583 - New --num-iterations option for hb-shape / hb-view; useful for
1586 Overview of changes leading to 0.9.15
1587 Friday, April 05, 2013
1588 =====================================
1591 - Fix crasher in graphite2 shaper.
1592 - Fix Arabic mark width zeroing regression.
1593 - Don't compose Hangul jamo into Unicode syllables.
1596 Overview of changes leading to 0.9.14
1597 Thursday, March 21, 2013
1598 =====================================
1601 - Fix time-consuming sanitize with malicious fonts.
1602 - Implement hb_buffer_deserialize_glyphs() for both json and text.
1603 - Do not ignore Hangul filler characters.
1605 * Fix Malayalam pre-base reordering interaction with post-forms.
1606 * Further adjust ZWJ handling. Should fix known regressions from
1610 Overview of changes leading to 0.9.13
1611 Thursday, February 25, 2013
1612 =====================================
1615 - Ngapi HarfBuzz Hackfest in London (February 2013):
1616 * Fixed all known Indic bugs,
1617 * New Win8-style Myanmar shaper,
1618 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
1619 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
1620 matching GSUB/GPOS lookups,
1621 * Fix 'Phags-Pa U+A872 shaping,
1622 * Fix partial disabling of default-on features,
1623 * Allow disabling of TrueType kerning.
1624 - Fix possible crasher with broken fonts with overlapping tables.
1625 - Removed generated files from git again. So, one needs ragel to
1626 bootstrap from the git tree.
1629 - hb_shape() and related APIs now abort if buffer direction is
1630 HB_DIRECTION_INVALID. Previously, hb_shape() was calling
1631 hb_buffer_guess_segment_properties() on the buffer before
1632 shaping. The heuristics in that function are fragile. If the
1633 user really wants the old behvaior, they can call that function
1634 right before calling hb_shape() to get the old behavior.
1635 - hb_blob_create_sub_blob() always creates sub-blob with
1636 HB_MEMORY_MODE_READONLY. See comments for the reason.
1639 Overview of changes leading to 0.9.12
1640 Thursday, January 18, 2013
1641 =====================================
1643 - Build fixes for Sun compiler.
1646 Overview of changes leading to 0.9.11
1647 Thursday, January 10, 2013
1648 =====================================
1651 - Fix GPOS mark attachment with null Anchor offsets.
1652 - [Indic] Fix old-spec reordering of viramas if sequence ends in one.
1653 - Fix multi-threaded shaper data creation crash.
1654 - Add atomic ops for Solaris.
1657 - Rename hb_buffer_clear() to hb_buffer_clear_contents().
1660 Overview of changes leading to 0.9.10
1661 Thursday, January 3, 2013
1662 =====================================
1664 - [Indic] Fixed rendering of Malayalam dot-reph
1665 - Updated OT language tags.
1666 - Updated graphite2 backend.
1667 - Improved hb_ot_layout_get_size_params() logic.
1668 - Improve hb-shape/hb-view help output.
1669 - Fixed hb-set.h implementation to not crash.
1670 - Fixed various issues with hb_ot_layout_collect_lookups().
1671 - Various build fixes.
1675 hb_graphite2_face_get_gr_face()
1676 hb_graphite2_font_get_gr_font()
1677 hb_coretext_face_get_cg_font()
1681 hb_ot_layout_get_size_params()
1684 Overview of changes leading to 0.9.9
1685 Wednesday, December 5, 2012
1686 ====================================
1688 - Fix build on Windows.
1689 - Minor improvements.
1692 Overview of changes leading to 0.9.8
1693 Tuesday, December 4, 2012
1694 ====================================
1697 - Actually implement hb_shape_plan_get_shaper ().
1698 - Make UCDB data tables const.
1699 - Lots of internal refactoring in OTLayout tables.
1700 - Flesh out hb_ot_layout_lookup_collect_glyphs().
1704 hb_ot_layout_collect_lookups()
1705 hb_ot_layout_get_size_params()
1708 Overview of changes leading to 0.9.7
1709 Sunday, November 21, 2012
1710 ====================================
1713 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
1715 - Fix Arabic contextual joining using pre-context text.
1716 - Fix Sinhala "split matra" mess.
1717 - Fix Khmer shaping with broken fonts.
1718 - Implement Thai "PUA" shaping for old fonts.
1719 - Do NOT route Kharoshthi script through the Indic shaper.
1720 - Disable fallback positioning for Indic and Thai shapers.
1724 hb-shape / hb-view changes:
1726 - Add --text-before and --text-after
1727 - Add --bot / --eot / --preserve-default-ignorables
1728 - hb-shape --output-format=json
1737 HB_BUFFER_FLAGS_DEFAULT
1740 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
1742 hb_buffer_set_flags()
1743 hb_buffer_get_flags()
1745 HB_BUFFER_SERIALIZE_FLAGS
1746 hb_buffer_serialize_glyphs()
1747 hb_buffer_deserialize_glyphs()
1748 hb_buffer_serialize_list_formats()
1752 hb_set_get_population()
1755 hb_face_[sg]et_glyph_count()
1757 hb_segment_properties_t
1758 HB_SEGMENT_PROPERTIES_DEFAULT
1759 hb_segment_properties_equal()
1760 hb_segment_properties_hash()
1762 hb_buffer_set_segment_properties()
1763 hb_buffer_get_segment_properties()
1765 hb_ot_layout_glyph_class_t
1766 hb_ot_layout_get_glyph_class()
1767 hb_ot_layout_get_glyphs_in_class()
1770 hb_shape_plan_create()
1771 hb_shape_plan_create_cached()
1772 hb_shape_plan_get_empty()
1773 hb_shape_plan_reference()
1774 hb_shape_plan_destroy()
1775 hb_shape_plan_set_user_data()
1776 hb_shape_plan_get_user_data()
1777 hb_shape_plan_execute()
1778 hb_shape_plan_get_shaper()
1780 hb_ot_shape_plan_collect_lookups()
1785 - Remove "mask" parameter from hb_buffer_add().
1786 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
1787 - hb-set.h API const correction.
1788 - Renamed hb_set_min/max() to hb_set_get_min/max().
1789 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
1790 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
1794 Overview of changes leading to 0.9.6
1795 Sunday, November 13, 2012
1796 ====================================
1798 - Don't clear pre-context text if no new context is provided.
1799 - Fix ReverseChainingSubstLookup, which was totally borked.
1800 - Adjust output format of hb-shape a bit.
1801 - Include config.h.in in-tree. Makes it easier for alternate build systems.
1802 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
1803 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
1804 - Drop glyphs for all of Unicode Default_Ignorable characters.
1808 - Enable 'dlig' and 'mset' features in Arabic shaper.
1809 - Implement 'Phags-pa shaping, improve Mongolian.
1812 - Decompose Sinhala split matras the way old HarfBuzz / Pango did.
1813 - Initial support for Consonant Medials.
1814 - Start adding new-style Myanmar shaping.
1815 - Make reph and 'pref' logic introspect the font.
1816 - Route Meetei-Mayek through the Indic shaper.
1817 - Don't apply 'liga' in Indic shaper.
1818 - Improve Malayalam pre-base reordering Ra interaction with Chillus.
1822 Overview of changes leading to 0.9.5
1823 Sunday, October 14, 2012
1824 ====================================
1826 - Synthetic-GSUB Arabic fallback shaping.
1828 - Misc Indic improvements.
1830 - Add build system support for pthread.
1832 - Imported UCDN for in-tree Unicode callbacks implementation.
1834 - Context-aware Arabic joining.
1840 hb_feature_to/from-string()
1841 hb_buffer_[sg]et_content_type()
1845 Overview of changes leading to 0.9.4
1846 Tuesday, Sep 03, 2012
1847 ====================================
1849 - Indic improvements with old-spec Malayalam.
1851 - Better fallback glyph positioning, specially with Thai / Lao marks.
1853 - Implement dotted-circle insertion.
1855 - Better Arabic fallback shaping / ligation.
1857 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
1863 Overview of changes leading to 0.9.3
1864 Friday, Aug 18, 2012
1865 ====================================
1867 - Fixed fallback mark positioning for left-to-right text.
1869 - Improve mark positioning for the remaining combining classes.
1871 - Unbreak Thai and fallback Arabic shaping.
1873 - Port Arabic shaper to shape-plan caching.
1875 - Use new ICU normalizer functions.
1879 Overview of changes leading to 0.9.2
1880 Friday, Aug 10, 2012
1881 ====================================
1883 - Over a thousand commits! This is the first major release of HarfBuzz.
1885 - HarfBuzz is feature-complete now! It should be in par, or better, than
1886 both Pango's shapers and old HarfBuzz / Qt shapers.
1888 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
1890 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
1891 Sinhala, N'ko, Mongolian, and Mandaic.
1893 - New Thai / Lao shaper.
1895 - Tibetan / Hangul support in the generic shaper.
1897 - Synthetic GDEF support for fonts without a GDEF table.
1899 - Fallback mark positioning for fonts without a GPOS table.
1901 - Unicode normalization shaping heuristic during glyph mapping.
1903 - New experimental Graphite2 backend.
1905 - New Uniscribe backend (primarily for testing).
1907 - New CoreText backend (primarily for testing).
1909 - Major optimization and speedup.
1911 - Test suites and testing infrastructure (work in progress).
1913 - Greatly improved hb-view cmdline tool.
1915 - hb-shape cmdline tool.
1917 - Unicode 6.1 support.
1919 Summary of API changes:
1923 - Users are expected to only include main header files now (ie. hb.h,
1924 hb-glib.h, hb-ft.h, ...)
1926 - All struct tag names had their initial underscore removed.
1927 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
1929 - All set_user_data() functions now take a "replace" boolean parameter.
1931 - hb_buffer_create() takes zero arguments now.
1932 Use hb_buffer_pre_allocate() to pre-allocate.
1934 - hb_buffer_add_utf*() now accept -1 for length parameteres,
1935 meaning "nul-terminated".
1937 - hb_direction_t enum values changed.
1939 - All *_from_string() APIs now take a length parameter to allow for
1940 non-nul-terminated strings. A -1 length means "nul-terminated".
1942 - Typedef for hb_language_t changed.
1944 - hb_get_table_func_t renamed to hb_reference_table_func_t.
1946 - hb_ot_layout_table_choose_script()
1948 - Various renames in hb-unicode.h.
1952 - hb_buffer_guess_properties()
1953 Automatically called by hb_shape().
1955 - hb_buffer_normalize_glyphs()
1957 - hb_tag_from_string()
1963 - hb_face_reference_blob()
1964 - hb_face_[sg]et_index()
1965 - hb_face_set_upem()
1967 - hb_font_get_glyph_name_func_t
1968 hb_font_get_glyph_from_name_func_t
1969 hb_font_funcs_set_glyph_name_func()
1970 hb_font_funcs_set_glyph_from_name_func()
1971 hb_font_get_glyph_name()
1972 hb_font_get_glyph_from_name()
1973 hb_font_glyph_to_string()
1974 hb_font_glyph_from_string()
1976 - hb_font_set_funcs_data()
1978 - hb_ft_font_set_funcs()
1979 - hb_ft_font_get_face()
1981 - hb-gobject.h (work in progress)
1983 - hb_ot_shape_glyphs_closure()
1984 hb_ot_layout_substitute_closure_lookup()
1990 - hb_unicode_combining_class_t
1992 - hb_unicode_compose_func_t
1993 hb_unicode_decompose_func_t
1994 hb_unicode_decompose_compatibility_func_t
1995 hb_unicode_funcs_set_compose_func()
1996 hb_unicode_funcs_set_decompose_func()
1997 hb_unicode_funcs_set_decompose_compatibility_func()
1998 hb_unicode_compose()
1999 hb_unicode_decompose()
2000 hb_unicode_decompose_compatibility()
2004 - hb_ft_get_font_funcs()
2006 - hb_ot_layout_substitute_start()
2007 hb_ot_layout_substitute_lookup()
2008 hb_ot_layout_substitute_finish()
2009 hb_ot_layout_position_start()
2010 hb_ot_layout_position_lookup()
2011 hb_ot_layout_position_finish()
2015 Overview of changes leading to 0.6.0
2016 Friday, May 27, 2011
2017 ====================================
2019 - Vertical text support in GPOS
2020 - Almost all API entries have unit tests now, under test/
2021 - All thread-safety issues are fixed
2023 Summary of API changes follows.
2030 hb_language_get_default()
2031 hb_direction_to_string()
2032 hb_direction_from_string()
2033 hb_script_get_horizontal_direction()
2037 hb_category_t renamed to hb_unicode_general_category_t
2040 hb_language_t is a typed pointers now
2046 * Use ISO 15924 tags for hb_script_t:
2049 hb_script_from_iso15924_tag()
2050 hb_script_to_iso15924_tag()
2051 hb_script_from_string()
2054 HB_SCRIPT_* enum members changed value.
2057 * Buffer API streamlined:
2061 hb_buffer_set_length()
2062 hb_buffer_allocation_successful()
2065 hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
2066 hb_buffer_add_glyph() renamed to hb_buffer_add()
2070 hb_buffer_clear_positions()
2073 hb_buffer_get_glyph_infos() takes an out length parameter now
2074 hb_buffer_get_glyph_positions() takes an out length parameter now
2077 * Blob API streamlined:
2081 hb_blob_get_data_writable()
2084 hb_blob_create_empty() renamed to hb_blob_get_empty()
2089 hb_blob_is_writable()
2090 hb_blob_try_writable()
2093 hb_blob_create() takes user_data before destroy now
2096 * Unicode functions API:
2098 o Unicode function vectors can subclass other unicode function vectors now.
2099 Unimplemented callbacks in the subclass automatically chainup to the parent.
2101 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
2102 take a user_data and its respective destroy callback.
2105 hb_unicode_funcs_get_empty()
2106 hb_unicode_funcs_get_default()
2107 hb_unicode_funcs_get_parent()
2110 hb_unicode_funcs_create() now takes a parent_funcs.
2112 o Removed func getter functions:
2113 hb_unicode_funcs_get_mirroring_func()
2114 hb_unicode_funcs_get_general_category_func()
2115 hb_unicode_funcs_get_script_func()
2116 hb_unicode_funcs_get_combining_class_func()
2117 hb_unicode_funcs_get_eastasian_width_func()
2123 hb_face_get_table() renamed to hb_face_reference_table()
2124 hb_face_create_for_data() renamed to hb_face_create()
2127 hb_face_create_for_tables() takes user_data before destroy now
2128 hb_face_reference_table() returns empty blob instead of NULL
2129 hb_get_table_func_t accepts the face as first parameter now
2133 o Fonts can subclass other fonts now. Unimplemented callbacks in the
2134 subclass automatically chainup to the parent. When chaining up,
2135 scale is adjusted if the parent font has a different scale.
2137 o All hb_font_funcs_t callbacks take a user_data now. Their setters
2138 take a user_data and its respective destroy callback.
2141 hb_font_get_parent()
2142 hb_font_funcs_get_empty()
2143 hb_font_create_sub_font()
2146 hb_font_funcs_copy()
2147 hb_font_unset_funcs()
2149 o Removed func getter functions:
2150 hb_font_funcs_get_glyph_func()
2151 hb_font_funcs_get_glyph_advance_func()
2152 hb_font_funcs_get_glyph_extents_func()
2153 hb_font_funcs_get_contour_point_func()
2154 hb_font_funcs_get_kerning_func()
2157 hb_font_create() takes a face and references it now
2158 hb_font_set_funcs() takes user_data before destroy now
2159 hb_font_set_scale() accepts signed integers now
2160 hb_font_get_contour_point_func_t now takes glyph first, then point_index
2161 hb_font_get_glyph_func_t returns a success boolean now
2164 * Changed object model:
2166 o All object types have a _get_empty() now:
2168 hb_buffer_get_empty()
2171 hb_font_funcs_get_empty()
2172 hb_unicode_funcs_get_empty()
2174 o Added _set_user_data() and _get_user_data() for all object types:
2175 hb_blob_get_user_data()
2176 hb_blob_set_user_data()
2177 hb_buffer_get_user_data()
2178 hb_buffer_set_user_data()
2179 hb_face_get_user_data()
2180 hb_face_set_user_data()
2181 hb_font_funcs_get_user_data()
2182 hb_font_funcs_set_user_data()
2183 hb_font_get_user_data()
2184 hb_font_set_user_data()
2185 hb_unicode_funcs_get_user_data()
2186 hb_unicode_funcs_set_user_data()
2188 o Removed the _get_reference_count() from all object types:
2189 hb_blob_get_reference_count()
2190 hb_buffer_get_reference_count()
2191 hb_face_get_reference_count()
2192 hb_font_funcs_get_reference_count()
2193 hb_font_get_reference_count()
2194 hb_unicode_funcs_get_reference_count()
2196 o Added _make_immutable() and _is_immutable() for all object types except for buffer:
2197 hb_blob_make_immutable()
2198 hb_blob_is_immutable()
2199 hb_face_make_immutable()
2200 hb_face_is_immutable()
2203 * Changed API for vertical text support
2205 o The following callbacks where removed:
2206 hb_font_get_glyph_advance_func_t
2207 hb_font_get_kerning_func_t
2209 o The following new callbacks added instead:
2210 hb_font_get_glyph_h_advance_func_t
2211 hb_font_get_glyph_v_advance_func_t
2212 hb_font_get_glyph_h_origin_func_t
2213 hb_font_get_glyph_v_origin_func_t
2214 hb_font_get_glyph_h_kerning_func_t
2215 hb_font_get_glyph_v_kerning_func_t
2217 o The following API removed as such:
2218 hb_font_funcs_set_glyph_advance_func()
2219 hb_font_funcs_set_kerning_func()
2220 hb_font_get_glyph_advance()
2221 hb_font_get_kerning()
2223 o New API added instead:
2224 hb_font_funcs_set_glyph_h_advance_func()
2225 hb_font_funcs_set_glyph_v_advance_func()
2226 hb_font_funcs_set_glyph_h_origin_func()
2227 hb_font_funcs_set_glyph_v_origin_func()
2228 hb_font_funcs_set_glyph_h_kerning_func()
2229 hb_font_funcs_set_glyph_v_kerning_func()
2230 hb_font_get_glyph_h_advance()
2231 hb_font_get_glyph_v_advance()
2232 hb_font_get_glyph_h_origin()
2233 hb_font_get_glyph_v_origin()
2234 hb_font_get_glyph_h_kerning()
2235 hb_font_get_glyph_v_kerning()
2237 o The following higher-leve API added for convenience:
2238 hb_font_get_glyph_advance_for_direction()
2239 hb_font_get_glyph_origin_for_direction()
2240 hb_font_add_glyph_origin_for_direction()
2241 hb_font_subtract_glyph_origin_for_direction()
2242 hb_font_get_glyph_kerning_for_direction()
2243 hb_font_get_glyph_extents_for_origin()
2244 hb_font_get_glyph_contour_point_for_origin()
2247 * OpenType Layout API:
2250 hb_ot_layout_position_start()
2251 hb_ot_layout_substitute_start()
2252 hb_ot_layout_substitute_finish()
2258 hb_glib_script_to_script()
2259 hb_glib_script_from_script()
2260 hb_icu_script_to_script()
2261 hb_icu_script_from_script()
2264 * Version API added: