1 Overview of changes leading to 2.3.1
2 Wednesday, January 30, 2019
3 ====================================
5 - Misc internal housekeeping cleanup.
8 Overview of changes leading to 2.3.0
9 Thursday, December 20, 2018
10 ====================================
11 - Fix regression on big-endian architectures. Ouch!
12 - Misc bug and build fixes.
13 - Fix subsetting of simple GSUB/GDEF.
14 - Merge CFF / CFF2 support contributed by Adobe. This mostly involves
15 the subsetter, but also get_glyph_extents on CFF fonts.
18 +hb_aat_layout_has_substitution()
19 +hb_aat_layout_has_positioning()
20 +hb_aat_layout_has_tracking()
23 Overview of changes leading to 2.2.0
24 Thursday, November 29, 2018
25 ====================================
26 - Misc shaping bug fixes.
27 - Add font variations named-instance API.
28 - Deprecate font variations axis enumeration API and add replacement.
29 - AAT shaping improvements:
30 o Fixed 'kern' table Format 2 implementation.
31 o Implement 'feat' table API for feature detection.
32 o Blacklist 'GSUB' table of fonts from 'MUTF' foundry that also have 'morx'.
35 +hb_aat_layout_feature_type_t
36 +hb_aat_layout_feature_selector_t
37 +hb_aat_layout_get_feature_types()
38 +hb_aat_layout_feature_type_get_name_id
39 +hb_aat_layout_feature_selector_info_t
40 +HB_AAT_LAYOUT_NO_SELECTOR_INDEX
41 +hb_aat_layout_feature_type_get_selector_infos()
42 +hb_ot_var_axis_flags_t
43 +hb_ot_var_axis_info_t
44 +hb_ot_var_get_axis_infos()
45 +hb_ot_var_find_axis_info()
46 +hb_ot_var_get_named_instance_count()
47 +hb_ot_var_named_instance_get_subfamily_name_id()
48 +hb_ot_var_named_instance_get_postscript_name_id()
49 +hb_ot_var_named_instance_get_design_coords()
52 +HB_OT_VAR_NO_AXIS_INDEX
55 +hb_ot_var_find_axis()
58 Overview of changes leading to 2.1.3
59 Friday, November 16, 2018
60 ====================================
61 - Fix AAT 'mort' shaping, which was broken in 2.1.2
64 Overview of changes leading to 2.1.2
65 Friday, November 16, 2018
66 ====================================
67 - Various internal changes.
68 - AAT shaping improvements:
69 o Implement kern table Format 1 state-machine-based kerning.
70 o Implement cross-stream kerning (cursive positioning, etc).
71 o Ignore emptyish GSUB tables (zero scripts) if morx present.
72 o Don't apply GPOS if morx is being applied. Matches Apple.
75 -Overview of changes leading to 2.1.1
76 Monday, November 5, 2018
77 ====================================
79 o Implement 'mort' table.
80 o Implement 'kern' subtables Format 1 and Format 3.
83 Overview of changes leading to 2.1.0
84 Tuesday, October 30, 2018
85 ====================================
86 - AAT shaping improvements:
87 o Allow user controlling AAT features, for whole buffer only currently.
88 o Several 'morx' fixes.
89 o Implement tuple-kerns in 'kerx'; Fixes kerning with Apple default
91 - Support for color fonts:
92 o COLR/CPAL API to fetch color layers.
93 o SVG table to fetch SVG documents.
94 o CBDT/sbix API to fetch PNG images.
95 - New 'name' table API.
96 - hb-ot-font now uses 'VORG' table to correctly position CFF glyphs
98 - Various fuzzer-found bug fixes.
102 A type and a macro added in 2.0.0 were renamed:
104 hb_name_id_t -> hb_ot_name_id_t
105 HB_NAME_ID_INVALID -> HB_OT_NAME_ID_INVALID
111 +hb_color_get_alpha()
113 +hb_color_get_green()
115 +hb_ot_color_has_palettes()
116 +hb_ot_color_palette_get_count()
117 +hb_ot_color_palette_get_name_id()
118 +hb_ot_color_palette_color_get_name_id()
119 +hb_ot_color_palette_flags_t
120 +hb_ot_color_palette_get_flags()
121 +hb_ot_color_palette_get_colors()
122 +hb_ot_color_has_layers()
124 +hb_ot_color_glyph_get_layers()
125 +hb_ot_color_has_svg()
126 +hb_ot_color_glyph_reference_svg()
127 +hb_ot_color_has_png()
128 +hb_ot_color_glyph_reference_png()
131 +HB_OT_NAME_ID_INVALID
132 +HB_OT_NAME_ID_COPYRIGHT
133 +HB_OT_NAME_ID_FONT_FAMILY
134 +HB_OT_NAME_ID_FONT_SUBFAMILY
135 +HB_OT_NAME_ID_UNIQUE_ID
136 +HB_OT_NAME_ID_FULL_NAME
137 +HB_OT_NAME_ID_VERSION_STRING
138 +HB_OT_NAME_ID_POSTSCRIPT_NAME
139 +HB_OT_NAME_ID_TRADEMARK
140 +HB_OT_NAME_ID_MANUFACTURER
141 +HB_OT_NAME_ID_DESIGNER
142 +HB_OT_NAME_ID_DESCRIPTION
143 +HB_OT_NAME_ID_VENDOR_URL
144 +HB_OT_NAME_ID_DESIGNER_URL
145 +HB_OT_NAME_ID_LICENSE
146 +HB_OT_NAME_ID_LICENSE_URL
147 +HB_OT_NAME_ID_TYPOGRAPHIC_FAMILY
148 +HB_OT_NAME_ID_TYPOGRAPHIC_SUBFAMILY
149 +HB_OT_NAME_ID_MAC_FULL_NAME
150 +HB_OT_NAME_ID_SAMPLE_TEXT
151 +HB_OT_NAME_ID_CID_FINDFONT_NAME
152 +HB_OT_NAME_ID_WWS_FAMILY
153 +HB_OT_NAME_ID_WWS_SUBFAMILY
154 +HB_OT_NAME_ID_LIGHT_BACKGROUND
155 +HB_OT_NAME_ID_DARK_BACKGROUND
156 +HB_OT_NAME_ID_VARIATIONS_PS_PREFIX
158 +hb_ot_name_list_names()
159 +hb_ot_name_get_utf8()
160 +hb_ot_name_get_utf16()
161 +hb_ot_name_get_utf32()
164 Overview of changes leading to 2.0.2
165 Saturday, October 20, 2018
166 ====================================
167 - Fix two minor memory access issues in AAT tables.
170 Overview of changes leading to 2.0.1
171 Friday, October 19, 2018
172 ====================================
173 - Fix hb-version.h reported release version that went wrong (1.8.0)
174 with previous release.
175 - Fix extrapolation in 'trak' table.
176 - Fix hb-font infinite-recursion issue with some font funcs and
178 - Implement variation-kerning format in kerx table, although without
180 - Fix return value of hb_map_is_empty().
183 Overview of changes leading to 2.0.0
184 Thursday, October 18, 2018
185 ====================================
186 - Added AAT shaping support (morx/kerx/trak).
187 Automatically used if GSUB/GPOS are not available respectively.
188 Set HB_OPTIONS=aat env var to have morx/kerx preferred over
190 - Apply TrueType kern table internally, instead of relying on
192 - Khmer shaper significantly rewritten to better match Uniscribe.
193 - Indic3 tags ('dev3', etc) are passed to USE shaper.
194 - .dfont Mac font containers implemented.
195 - Script- and language-mapping revamped to better use BCP 47.
196 - Misc USE and Indic fixes.
197 - Misc everything fixes.
198 - Too many things to list. Biggest release since 0.9.1, with
199 over 500 commits in just over 5 weeks! Didn't intend it to
200 be a big release. Just happened to become.
201 - hb-ft now locks underlying FT_Face during use.
205 - Newly-created hb_font_t's now have our internal "hb-ot-font"
206 callbacks set on them, so they should work out of the box
207 without any callbacks set. If callbacks are set, everything
208 is back to what it was before, the fallback callbacks are
209 null. If you to get the internal implementation modified,
212 - New hb_font_funcs_set_nominal_glyphs_func() allows speeding
213 up character to glyph mapping.
216 +HB_FEATURE_GLOBAL_START
217 +HB_FEATURE_GLOBAL_END
218 +hb_buffer_set_invisible_glyph()
219 +hb_buffer_get_invisible_glyph()
220 +hb_font_funcs_set_nominal_glyphs_func()
221 +hb_ot_layout_table_select_script()
222 +hb_ot_layout_script_select_language()
223 +hb_ot_layout_feature_get_name_ids()
224 +hb_ot_layout_feature_get_characters()
227 +HB_OT_MAX_TAGS_PER_SCRIPT
228 +hb_ot_tags_from_script_and_language()
229 +hb_ot_tags_to_script_and_language()
232 -hb_font_funcs_set_glyph_func()
233 -hb_unicode_eastasian_width_func_t
234 -hb_unicode_funcs_set_eastasian_width_func()
235 -hb_unicode_eastasian_width()
236 -hb_unicode_decompose_compatibility_func_t
237 -HB_UNICODE_MAX_DECOMPOSITION_LEN
238 -hb_unicode_funcs_set_decompose_compatibility_func()
239 -hb_unicode_decompose_compatibility()
240 -hb_font_funcs_set_glyph_h_kerning_func()
241 -hb_font_funcs_set_glyph_v_kerning_func()
242 -hb_font_get_glyph_h_kerning()
243 -hb_font_get_glyph_v_kerning()
244 -hb_font_get_glyph_kerning_for_direction()
245 -hb_ot_layout_table_choose_script()
246 -hb_ot_layout_script_find_language()
247 -hb_ot_tags_from_script()
248 -hb_ot_tag_from_language()
251 Overview of changes leading to 1.9.0
252 Monday, September 10, 2018
253 ====================================
254 - Added 'cmap' API to hb_face_t.
256 - hb-ot-font re-creation should be much leaner now, as the
257 font tables it uses are cached on hb_face_t now.
258 - Internal source header file name changes:
259 hb-*-private.hh is renamed to hb-*.hh.
263 +hb_face_collect_unicodes()
264 +hb_face_collect_variation_selectors()
265 +hb_face_collect_variation_unicodes()
266 +hb_face_builder_create()
267 +hb_face_builder_add_table()
270 Overview of changes leading to 1.8.8
271 Tuesday, August 14, 2018
272 ====================================
273 - Fix hb-icu crash on architectures where compare_exchange_weak() can
274 fail falsely. This bug was introduced in 1.8.4.
275 https://bugs.chromium.org/p/chromium/issues/detail?id=873568
276 - More internal refactoring of atomic operations and singletons.
278 The following functions do NOT reference their return value before
280 * hb_unicode_funcs_get_default()
281 * hb_glib_get_unicode_funcs()
282 * hb_icu_get_unicode_funcs()
283 This is consistent with their naming ("get", instead of "reference")
284 as well as how they are used in the wild (ie. no one calls destroy()
285 on their return value.)
288 Overview of changes leading to 1.8.7
289 Wednesday, August 8, 2018
290 ====================================
291 - Fix assertion failure with GDEF-blacklisted fonts.
294 Overview of changes leading to 1.8.6
295 Tuesday, August 7, 2018
296 ====================================
297 - Internal code shuffling.
298 - New API to speed up getting advance widths for implementations
299 that have heavy overhead in get_h_advance callback:
300 +hb_font_funcs_set_glyph_h_advances_func
301 +hb_font_funcs_set_glyph_v_advances_func
302 +hb_font_get_glyph_advances_for_direction
303 +hb_font_get_glyph_h_advances
304 +hb_font_get_glyph_h_advances_func_t
305 +hb_font_get_glyph_v_advances
306 +hb_font_get_glyph_v_advances_func_t
309 Overview of changes leading to 1.8.5
310 Wednesday, August 1, 2018
311 ====================================
312 - Major Khmer shaper improvements to better match Microsoft.
314 - Internal improvements to atomic operations.
317 Overview of changes leading to 1.8.4
318 Tuesday, July 17, 2018
319 ====================================
320 - Fix build on non-C++11.
321 - Use C++-style GCC atomics and C++11 atomics.
324 Overview of changes leading to 1.8.3
325 Wednesday, July 11, 2018
326 ====================================
327 - A couple of Indic / USE bug fixes.
328 - Disable vectorization, as it was causing unaligned access bus error on
329 certain 32bit architectures.
332 Overview of changes leading to 1.8.2
333 Tuesday, July 3, 2018
334 ====================================
335 - Fix infinite loop in Khmer shaper.
336 - Improve hb_blob_create_from_file() for streams.
339 Overview of changes leading to 1.8.1
340 Tuesday, June 12, 2018
341 ====================================
342 - Fix hb-version.h file generation; last two releases went out with wrong ones.
343 - Add correctness bug in hb_set_t operations, introduced in 1.7.7.
344 - Remove HB_SUBSET_BUILTIN build option. Not necessary.
347 Overview of changes leading to 1.8.0
348 Tuesday, June 5, 2018
349 ====================================
350 - Update to Unicode 11.0.0.
353 Overview of changes leading to 1.7.7
354 Tuesday, June 5, 2018
355 ====================================
356 - Lots of internal changes, but not yet exposed externally.
357 - All HarfBuzz objects are significantly smaller in size now.
358 - Sinhala: Position repha on top of post-consonant, not base.
359 This better matches Windows 10 behavior, which was changed
360 from previous Windows versions.
362 o New cpp macro HB_NO_ATEXIT
363 o New cpp macro HB_SUBSET_BUILTIN
364 - Significant libharfbuzz-subset changes. API subject to change.
365 - New API in libharfbuzz:
367 +hb_blob_create_from_file()
370 A hashmap implementation:
372 +HB_MAP_VALUE_INVALID
378 +hb_map_set_user_data()
379 +hb_map_get_user_data()
380 +hb_map_allocation_successful()
383 +hb_map_get_population()
390 Overview of changes leading to 1.7.6
391 Wednesday, March 7, 2018
392 ====================================
394 - Fix to hb_set_t binary operations. Ouch.
395 - New experimental harfbuzz-subset library. All of hb-subset.h
396 is experimental right now and API WILL change.
399 hb_blob_copy_writable_or_fail()
402 hb_set_previous_range()
405 Overview of changes leading to 1.7.5
406 Tuesday, January 30, 2018
407 ====================================
409 - Separate Khmer shaper from Indic.
410 - First stab at AAT morx. Not hooked up.
414 Overview of changes leading to 1.7.4
415 Wednesday, December 20, 2017
416 ====================================
418 - Fix collect_glyphs() regression caused by hb_set_t changes.
421 Overview of changes leading to 1.7.3
422 Monday, December 18, 2017
423 ====================================
425 - hb_set_t performance tuning and optimizations.
426 - Speed up collect_glyphs() and reject garbage data.
427 - In hb_coretext_font_create() set font point-size (ptem).
431 Overview of changes leading to 1.7.2
432 Monday, December 4, 2017
433 ====================================
435 - Optimize hb_set_add_range().
438 hb_coretext_font_create()
441 Overview of changes leading to 1.7.1
442 Tuesday, November 14, 2017
443 ====================================
445 - Fix atexit object destruction regression.
446 - Fix minor integer-overflow.
449 Overview of changes leading to 1.7.0
450 Monday, November 13, 2017
451 ====================================
454 - Implement kerning and glyph names in hb-ot-font.
455 - Various DSO optimization re .data and .bss sizes.
456 - Make C++11 optional; build fixes.
457 - Mark all other backends "unsafe-to-break".
461 Overview of changes leading to 1.6.3
462 Thursday, October 26th, 2017
463 ====================================
465 - Fix hb_set_t some more. Should be solid now.
466 - Implement get_glyph_name() for hb-ot-font.
470 Overview of changes leading to 1.6.2
471 Monday, October 23nd, 2017
472 ====================================
474 - Yesterday's release had a bad crasher; don't use it. That's what
475 happens when one works on Sunday...
476 https://github.com/harfbuzz/harfbuzz/issues/578
477 - Build fixes for FreeBSD and Chrome Android.
480 Overview of changes leading to 1.6.1
481 Sunday, October 22nd, 2017
482 ====================================
484 - Don't skip over COMBINING GRAPHEME JOINER when ligating, etc.
485 To be refined: https://github.com/harfbuzz/harfbuzz/issues/554
486 - Faster hb_set_t implementation.
487 - Don't use deprecated ICU API.
488 - Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0
493 Overview of changes leading to 1.6.0
494 Friday, October the 13th, 2017
495 ====================================
497 - Update to Unicode 10.
499 - Various Indic and Universal Shaping Engine fixes as a result of
500 HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at
501 the Igalia offices in A Coruña, Spain. Thanks Igalia for having
504 - Implement Unicode Arabic Mark Ordering Algorithm UTR#53.
506 - Implement optical sizing / tracking in CoreText backend, using
507 new API hb_font_set_ptem().
509 - Allow notifying hb_font_t that underlying FT_Face changed sizing,
510 using new API hb_ft_font_changed().
512 - More Graphite backend RTL fixes.
514 - Fix caching of variable font shaping plans.
516 - hb-view / hb-shape now accept following new arguments:
518 o --unicodes: takes a list of hex numbers that represent Unicode
522 +hb_face_get_table_tags()
525 +hb_ft_font_changed()
528 Overview of changes leading to 1.5.1
529 Tuesday, September 5, 2017
530 ====================================
532 - Fix "unsafe-to-break" in fallback shaping and other corner cases.
533 All our tests pass with --verify now, meaning unsafe-to-break API
535 - Add --unicodes to hb-view / hb-shape.
536 - [indic] Treat Consonant_With_Stacker as consonant. This will need
538 - hb_buffer_diff() tweaks.
541 Overview of changes leading to 1.5.0
542 Wednesday, August 23, 2017
543 ====================================
545 - Misc new API, for appending a buffer to another, and for comparing
546 contents of two buffers for types of differences.
548 - New "unsafe-to-break" API. Can be used to speed up reshaping
549 in line-breaking situations. Essentially, after shaping, it returns
550 positions in the input string (some of the cluster boundaries) that
551 are "safe to break" in that if the text is segmented at that position
552 and two sides reshaped and concatenated, the shaping result is
553 exactly the same as shaping the text in one piece.
555 hb-view and hb-shape and hb-shape now take --verify, which verifies
558 Some corner cases of the implementation are still not quite working.
559 Those will be fixed in subsequent releases.
566 HB_GLYPH_FLAG_UNSAFE_TO_BREAK
567 HB_GLYPH_FLAG_DEFINED
568 hb_glyph_info_get_glyph_flags()
570 HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS
572 hb_buffer_diff_flags_t
573 HB_BUFFER_DIFF_FLAG_EQUAL
574 HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH
575 HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH
576 HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT
577 HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT
578 HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH
579 HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH
580 HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH
581 HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH
585 Overview of changes leading to 1.4.8
586 Tuesday, August 8, 2017
587 ====================================
589 - Major fix to avar table handling.
590 - Rename hb-shape --show-message to --trace.
594 Overview of changes leading to 1.4.7
595 Tuesday, July 18, 2017
596 ====================================
598 - Multiple Indic, Tibetan, and Cham fixes.
599 - CoreText: Allow disabling kerning.
600 - Adjust Arabic feature order again.
604 Overview of changes leading to 1.4.6
605 Sunday, April 23, 2017
606 ====================================
608 - Graphite2: Fix RTL positioning issue.
609 - Backlist GDEF of more versions of Padauk and Tahoma.
610 - New, experimental, cmake alternative build system.
613 Overview of changes leading to 1.4.5
614 Friday, March 10, 2017
615 ====================================
617 - Revert "Fix Context lookup application when moving back after a glyph..."
618 This introduced memory access problems. To be fixed properly soon.
621 Overview of changes leading to 1.4.4
622 Sunday, March 5, 2017
623 ====================================
625 - Fix Context lookup application when moving back after a glyph deletion.
626 - Fix buffer-overrun in Bengali.
629 Overview of changes leading to 1.4.3
630 Saturday, February 25, 2017
631 ====================================
633 - Route Adlam script to Arabic shaper.
638 hb_graphite2_font_get_gr_font()
641 Overview of changes leading to 1.4.2
642 Monday, January 23, 2017
643 ====================================
645 - Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR.
646 - hb-shape and hb-view now accept --variations.
650 hb_variation_from_string()
651 hb_variation_to_string()
653 hb_font_set_variations()
654 hb_font_set_var_coords_design()
655 hb_font_get_var_coords_normalized()
660 hb_ot_var_get_axis_count()
662 hb_ot_var_find_axis()
663 hb_ot_var_normalize_variations()
664 hb_ot_var_normalize_coords()
666 - MVAR to be implemented later. Access to named instances to be
667 implemented later as well.
672 Overview of changes leading to 1.4.1
673 Thursday, January 5, 2017
674 ====================================
676 - Always build and use UCDN for Unicode data by default.
677 Reduces dependence on version of Unicode data in glib,
678 specially in the Windows bundles we are shipping, which
682 Overview of changes leading to 1.4.0
683 Thursday, January 5, 2017
684 ====================================
686 - Merged "OpenType GX" branch which adds core of support for
687 OpenType 1.8 Font Variations. To that extent, the relevant
691 hb_font_set_var_coords_normalized()
696 HB_OT_LAYOUT_NO_VARIATIONS_INDEX
697 hb_ot_layout_table_find_feature_variations()
698 hb_ot_layout_feature_with_variations_get_lookups()
699 hb_shape_plan_create2()
700 hb_shape_plan_create_cached2()
702 Currently variations in GSUB/GPOS/GDEF are fully supported,
703 and no other tables are supported. In particular, fvar/avar
704 are NOT supported, hence the hb_font_set_var_coords_normalized()
705 taking normalized coordinates. API to take design coordinates
706 will be added in the future.
708 HVAR/VVAR/MVAR support will also be added to hb-ot-font in the
711 - Fix regression in GDEF glyph class processing.
712 - Add decompositions for Chakma, Limbu, and Balinese in USE shaper.
716 Overview of changes leading to 1.3.4
717 Monday, December 5, 2016
718 ====================================
720 - Fix vertical glyph origin in hb-ot-font.
721 - Implement CBDT/CBLC color font glyph extents in hb-ot-font.
724 Overview of changes leading to 1.3.3
725 Wednesday, September 28, 2016
726 ====================================
728 - Implement parsing of OpenType MATH table.
732 hb_ot_math_constant_t
734 hb_ot_math_glyph_variant_t
735 hb_ot_math_glyph_part_flags_t
736 hb_ot_math_glyph_part_t
738 hb_ot_math_get_constant
739 hb_ot_math_get_glyph_italics_correction
740 hb_ot_math_get_glyph_top_accent_attachment
741 hb_ot_math_get_glyph_kerning
742 hb_ot_math_is_glyph_extended_shape
743 hb_ot_math_get_glyph_variants
744 hb_ot_math_get_min_connector_overlap
745 hb_ot_math_get_glyph_assembly
748 Overview of changes leading to 1.3.2
749 Wednesday, September 27, 2016
750 ====================================
752 - Fix build of hb-coretext on older OS X versions.
755 Overview of changes leading to 1.3.1
756 Wednesday, September 7, 2016
757 ====================================
759 - Blacklist bad GDEF of more fonts (Padauk).
760 - More CoreText backend crash fixes with OS X 10.9.5.
764 Overview of changes leading to 1.3.0
765 Thursday, July 21, 2016
766 ====================================
768 - Update to Unicode 9.0.0
769 - Move Javanese from Indic shaper to Universal Shaping Engine.
770 - Allow MultipleSubst to delete a glyph (matching Windows engine).
771 - Update Universal Shaping Engine to latest draft from Microsoft.
772 - DirectWrite backend improvements. Note: this backend is for testing ONLY.
773 - CoreText backend improvements with unreachable fonts.
774 - Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font.
775 - Blacklist bad GDEF of more fonts (Tahoma & others).
779 Overview of changes leading to 1.2.7
781 ====================================
783 - Blacklist another version of Times New Roman (Bold) Italic from Windows 7.
784 - Fix Mongolian Free Variation Selectors shaping with certain fonts.
785 - Fix Tibetan shorthand contractions shaping.
786 - Improved list of language tag mappings.
787 - Unbreak build on Windows CE.
788 - Make 'glyf' table loading lazy in hb-ot-font.
791 Overview of changes leading to 1.2.6
792 Friday, April 8, 2016
793 ====================================
795 - Blacklist GDEF table of another set of Times New Roman (Bold) Italic.
796 - DirectWrite backend improvements. Note: DirectWrite backend is
797 exclusively for our internal testing and should NOT be used in any
798 production system whatsoever.
801 Overview of changes leading to 1.2.5
802 Monday, April 4, 2016
803 ====================================
805 - Fix GDEF mark-filtering-set, which was broken in 1.2.3.
808 Overview of changes leading to 1.2.4
809 Thursday, March 17, 2016
810 ====================================
812 - Synthesize GDEF glyph class for any glyph that does not have one in GDEF.
813 I really hope we don't discover broken fonts that shape badly with this
815 - Misc build and other minor fixes.
817 - Added HB_NDEBUG. It's fine for production systems to define this to
818 disable high-overhead debugging checks. However, I also reduced the
819 overhead of those checks, so it's a non-issue right now. You can
820 forget it. Just not defining anything at all is fine.
823 Overview of changes leading to 1.2.3
824 Thursday, February 25, 2016
825 ====================================
827 - Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic,
828 due to bug in glyph class of ASCII double-quote character. This should
829 address "regression" introduced in 1.2.0 when we switched mark zeroing
830 in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE.
831 This fourth release in a week should finally stablize things...
833 - hb-ot-font's get_glyph() implementation saw some optimizations. Though,
834 might be really hard to measure in real-world situations.
836 - Also, two rather small API changes:
838 We now disable some time-consuming internal bookkeeping if built with NDEBUG
839 defined. This is a first time that we use NDEBUG to disable debug code. If
840 there exist production systems that do NOT want to enable NDEBUG, please let
841 me know and I'll add HB_NDEBUG.
843 Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph()
846 - hb_font_get_nominal_glyph_func_t
847 - hb_font_get_variation_glyph_func_t
848 - hb_font_funcs_set_nominal_glyph_func()
849 - hb_font_funcs_set_variation_glyph_func()
850 - hb_font_get_nominal_glyph()
851 - hb_font_get_variation_glyph()
854 - hb_font_get_glyph_func_t
855 - hb_font_funcs_set_glyph_func()
857 Clients that implement their own font-funcs are encouraged to replace
858 their get_glyph() implementation with a get_nominal_glyph() and
859 get_variation_glyph() pair. The variation version can assume that
860 variation_selector argument is not zero. Old (deprecated) functions
861 will continue working indefinitely using internal gymnastics; it is
862 just more efficient to use the new functions.
865 Overview of changes leading to 1.2.2
866 Wednesday, February 24, 2016
867 ====================================
869 - Fix regression with mark positioning with fonts that have
870 non-zero mark advances. This was introduced in 1.2.0 while
871 trying to make mark and cursive attachments to work together.
872 I have partially reverted that, so this version is much more
873 like what we had before. All clients who updated to 1.2.0
874 should update to this version.
877 Overview of changes leading to 1.2.1
878 Tuesday, February 23, 2016
879 ====================================
881 - CoreText: Fix bug with wrong scale if font scale was changed later.
882 https://github.com/libass/libass/issues/212
883 - CoreText: Drastically speed up font initialization.
884 - CoreText: Fix tiny leak.
885 - Group ZWJ/ZWNJ with previous syllable under cluster-level=0.
886 https://github.com/harfbuzz/harfbuzz/issues/217
887 - Add test/shaping/README.md about how to add tests to the suite.
890 Overview of changes leading to 1.2.0
891 Friday, February 19, 2016
892 ====================================
894 - Fix various issues (hangs mostly) in case of memory allocation failure.
895 - Change mark zeroing types of most shapers from BY_UNICODE_LATE to
896 BY_GDEF_LATE. This seems to be what Uniscribe does.
897 - Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's
899 - Allow GPOS cursive connection on marks, and fix the interaction with
900 mark attachment. This work resulted in some changes to how mark
901 attachments work. See:
902 https://github.com/harfbuzz/harfbuzz/issues/211
903 https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2
904 - Graphite2 shaper: improved negative advance handling (eg. Nastaliq).
905 - Add nmake-based build system for Windows.
907 - Misc. improvements.
910 Overview of changes leading to 1.1.3
911 Monday, January 11, 2016
912 ====================================
914 - Ported Indic shaper to Unicode 8.0 data.
915 - Universal Shaping Engine fixes.
916 - Speed up CoreText shaper when font fallback happens in CoreText.
917 - Documentation improvements, thanks to Khaled Hosny.
918 - Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi.
924 hb_font_get_font_extents_func_t
925 hb_font_get_font_h_extents_func_t
926 hb_font_get_font_v_extents_func_t
927 hb_font_funcs_set_font_h_extents_func
928 hb_font_funcs_set_font_v_extents_func
929 hb_font_get_h_extents
930 hb_font_get_v_extents
931 hb_font_get_extents_for_direction
933 * Buffer message (aka debug):
934 hb_buffer_message_func_t
935 hb_buffer_set_message_func()
936 Actual message protocol to be fleshed out later.
939 Overview of changes leading to 1.1.2
940 Wednesday, November 26, 2015
941 ====================================
943 - Fix badly-broken fallback shaper that affected terminology.
944 https://github.com/harfbuzz/harfbuzz/issues/187
945 - Fix y_scaling in Graphite shaper.
947 * An unset glyph_h_origin() function in font-funcs now (sensibly)
948 implies horizontal origin at 0,0. Ie, the nil callback returns
949 true instead of false. As such, implementations that have a
950 glyph_h_origin() that simply returns true, can remove that function
951 with HarfBuzz >= 1.1.2. This results in a tiny speedup.
954 Overview of changes leading to 1.1.1
955 Wednesday, November 24, 2015
956 ====================================
958 - Build fixes, specially for hb-coretext.
961 Overview of changes leading to 1.1.0
962 Wednesday, November 18, 2015
963 ====================================
965 - Implement 'stch' stretch feature for Syriac Abbreviation Mark.
966 https://github.com/harfbuzz/harfbuzz/issues/141
967 - Disable use of decompose_compatibility() callback.
968 - Implement "shaping" of various Unicode space characters, even
969 if the font does not support them.
970 https://github.com/harfbuzz/harfbuzz/issues/153
971 - If font does not support U+2011 NO-BREAK HYPHEN, fallback to
973 - Changes resulting from libFuzzer continuous fuzzing:
974 * Reject font tables that need more than 8 edits,
975 * Bound buffer growth during shaping to 32x,
976 * Fix assertions and other issues at OOM / buffer max-growth.
977 - Misc fixes and optimizations.
979 * All fonts created with hb_font_create() now inherit from
980 (ie. have parent) hb_font_get_empty().
983 Overview of changes leading to 1.0.6
984 Thursday, October 15, 2015
985 ====================================
987 - Reduce max nesting level in OT lookups from 8 to 6.
988 Should not affect any real font as far as I know.
989 - Fix memory access issue in ot-font.
990 - Revert default load-flags of fonts created using hb_ft_font_create()
991 back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in
992 last release (1.0.5), but caused major issues, so revert.
993 https://github.com/harfbuzz/harfbuzz/issues/143
996 Overview of changes leading to 1.0.5
997 Tuesday, October 13, 2015
998 ====================================
1000 - Fix multiple memory access bugs discovered using libFuzzer.
1001 https://github.com/harfbuzz/harfbuzz/issues/139
1002 Everyone should upgrade to this version as soon as possible.
1003 We now have continuous fuzzing set up, to avoid issues like
1004 these creeping in again.
1008 * hb_font_set_parent().
1009 * hb_ft_font_[sg]et_load_flags()
1010 The default flags for fonts created using hb_ft_font_create()
1011 has changed to default to FT_LOAD_DEFAULT now. Previously it
1012 was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING.
1015 * Fonts now default to units-per-EM as their scale, instead of 0.
1016 * hb_font_create_sub_font() does NOT make parent font immutable
1017 anymore. hb_font_make_immutable() does.
1020 Overview of changes leading to 1.0.4
1021 Wednesday, September 30, 2015
1022 ====================================
1024 - Fix minor out-of-bounds read error.
1027 Overview of changes leading to 1.0.3
1028 Tuesday, September 1, 2015
1029 ====================================
1031 - Start of user documentation, from Simon Cozens!
1032 - Implement glyph_extents() for TrueType fonts in hb-ot-font.
1033 - Improve GPOS cursive attachments with conflicting lookups.
1034 - More fixes for cluster-level = 1.
1035 - Uniscribe positioning fix.
1038 Overview of changes leading to 1.0.2
1039 Wednesday, August 19, 2015
1040 ====================================
1042 - Fix shaping with cluster-level > 0.
1043 - Fix Uniscribe backend font-size scaling.
1044 - Declare dependencies in harfbuzz.pc.
1045 FreeType is not declared though, to avoid bugs in pkg-config
1046 0.26 with recursive dependencies.
1047 - Slightly improved debug infrastructure. More to come later.
1051 Overview of changes leading to 1.0.1
1052 Monday, July 27, 2015
1053 ====================================
1055 - Fix out-of-bounds access in USE shaper.
1058 Overview of changes leading to 1.0.0
1059 Sunday, July 26, 2015
1060 ====================================
1062 - Implement Universal Shaping Engine:
1063 https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm
1064 http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/
1065 - Bump version to 1.0.0. The soname was NOT bumped.
1068 Overview of changes leading to 0.9.42
1069 Thursday, July 26, 2015
1070 =====================================
1072 - New API to allow for retrieving finer-grained cluster
1073 mappings if the client desires to handle them. Default
1074 behavior is unchanged.
1075 - Fix cluster merging when removing default-ignorables.
1076 - Update to Unicode 8.0
1077 - hb-graphite2 fixes.
1079 - Removed HB_NO_MERGE_CLUSTERS hack.
1081 hb_buffer_cluster_level_t enum
1082 hb_buffer_get_cluster_level()
1083 hb_buffer_set_cluster_level()
1084 hb-shape / hb-view --cluster-level
1087 Overview of changes leading to 0.9.41
1088 Thursday, June 18, 2015
1089 =====================================
1091 - Fix hb-coretext with trailing whitespace in right-to-left.
1092 - New API: hb_buffer_reverse_range().
1093 - Allow implementing atomic ops in config.h.
1094 - Fix hb_language_t in language bindings.
1098 Overview of changes leading to 0.9.40
1099 Friday, March 20, 2015
1100 =====================================
1102 - Another hb-coretext crasher fix. Ouch!
1106 Overview of changes leading to 0.9.39
1107 Wednesday, March 4, 2015
1108 =====================================
1110 - Critical hb-coretext fixes.
1111 - Optimizations and refactoring; no functional change
1116 Overview of changes leading to 0.9.38
1117 Friday, January 23, 2015
1118 =====================================
1120 - Fix minor out-of-bounds access in Indic shaper.
1121 - Change New Tai Lue shaping engine from South-East Asian to default,
1122 reflecting change in Unicode encoding model.
1123 - Add hb-shape --font-size. Can take up to two numbers for separate
1125 - Fix CoreText and FreeType scale issues with negative scales.
1126 - Reject blobs larger than 2GB. This might break some icu-le-hb clients
1127 that need security fixes. See:
1128 http://www.icu-project.org/trac/ticket/11450
1129 - Avoid accessing font tables during face destruction, in casce rogue
1130 clients released face data already.
1131 - Fix up gobject-introspection a bit. Python bindings kinda working.
1135 hb_ft_face_create_referenced()
1136 hb_ft_font_create_referenced()
1139 Overview of changes leading to 0.9.37
1140 Wednesday, December 17, 2014
1141 =====================================
1143 - Fix out-of-bounds access in Context lookup format 3.
1144 - Indic: Allow ZWJ/ZWNJ before syllable modifiers.
1147 Overview of changes leading to 0.9.36
1148 Thursday, November 20, 2014
1149 =====================================
1151 - First time that three months went by without a release since
1152 0.9.2 was released on August 10, 2012!
1153 - Fix performance bug in hb_ot_collect_glyphs():
1154 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869
1155 - Add basic vertical-text support to hb-ot-font.
1159 Overview of changes leading to 0.9.35
1160 Saturday, August 13, 2014
1161 =====================================
1163 - Fix major shape-plan caching bug when more than one shaper were
1164 provided to hb_shape_full() (as exercised by XeTeX).
1165 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
1166 - Fix Arabic fallback shaping regression. This was broken in 0.9.32.
1167 - Major hb-coretext fixes. That backend is complete now, including
1168 respecing buffer direction and language, down to vertical writing.
1169 - Build fixes for Windows CE. Should build fine now.
1171 Use atexit() only if it's safe to call from shared library
1172 https://bugs.freedesktop.org/show_bug.cgi?id=82246
1173 Mandaic had errors in its Unicode Joining_Type
1174 https://bugs.freedesktop.org/show_bug.cgi?id=82306
1177 * hb_buffer_clear_contents() does not reset buffer flags now.
1179 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
1180 need to set flags for different pieces of text. The flags now
1181 are something the client sets up once, depending on how it
1182 actually uses the buffer. As such, don't clear it in
1185 I don't expect any changes to be needed to any existing client.
1188 Overview of changes leading to 0.9.34
1189 Saturday, August 2, 2014
1190 =====================================
1192 - hb_feature_from_string() now accepts CSS font-feature-settings format.
1193 - As a result, hb-shape / hb-view --features also accept CSS-style strings.
1194 Eg, "'liga' off" is accepted now.
1195 - Add old-spec Myanmar shaper:
1196 https://bugs.freedesktop.org/show_bug.cgi?id=81775
1197 - Don't apply 'calt' in Hangul shaper.
1198 - Fix mark advance zeroing for Hebrew shaper:
1199 https://bugs.freedesktop.org/show_bug.cgi?id=76767
1200 - Implement Windows-1256 custom Arabic shaping. Only built on Windows,
1201 and requires help from get_glyph(). Used by Firefox.
1202 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
1203 - Disable 'liga' in vertical text.
1207 * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
1209 Previously, we expected users to provide BOT/EOT flags when the
1210 text *segment* was at paragraph boundaries. This meant that for
1211 clients that provide full paragraph to HarfBuzz (eg. Pango), they
1214 hb_buffer_set_flags (hb_buffer,
1215 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
1216 (item_offset + item_length == paragraph_length ?
1217 HB_BUFFER_FLAG_EOT : 0));
1219 hb_buffer_add_utf8 (hb_buffer,
1220 paragraph_text, paragraph_length,
1221 item_offset, item_length);
1223 After this change such clients can simply say:
1225 hb_buffer_set_flags (hb_buffer,
1226 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
1228 hb_buffer_add_utf8 (hb_buffer,
1229 paragraph_text, paragraph_length,
1230 item_offset, item_length);
1232 Ie, HarfBuzz itself checks whether the segment is at the beginning/end
1233 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
1234 continue not setting any flags whatsoever.
1236 Another way to put it is: if there's pre-context text in the buffer,
1237 HarfBuzz ignores the BOT flag. If there's post-context, it ignores
1241 Overview of changes leading to 0.9.33
1242 Tuesday, July 22, 2014
1243 =====================================
1245 - Turn off ARabic 'cswh' feature that was accidentally turned on.
1246 - Add HB_TAG_MAX_SIGNED.
1247 - Make hb_face_make_immutable() really make face immutable!
1248 - Windows build fixes.
1251 Overview of changes leading to 0.9.32
1252 Thursday, July 17, 2014
1253 =====================================
1255 - Apply Arabic shaping features in spec order exactly.
1256 - Another fix for Mongolian free variation selectors.
1257 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
1259 - Minor adjustment to U+FFFD logic.
1260 - Fix hb-coretext build.
1263 Overview of changes leading to 0.9.31
1264 Wednesday, July 16, 2014
1265 =====================================
1267 - Only accept valid UTF-8/16/32; we missed many cases before.
1268 - Better shaping of invalid UTF-8/16/32. Falls back to
1269 U+FFFD REPLACEMENT CHARACTER now.
1270 - With all changes in this release, the buffer will contain fully
1271 valid Unicode after hb_buffer_add_utf8/16/32 no matter how
1272 broken the input is. This can be overridden though. See below.
1273 - Fix Mongolian Variation Selectors for fonts without GDEF.
1274 - Fix minor invalid buffer access.
1275 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language()
1276 now uses these instead of private tags.
1279 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
1280 used to do, ie. no validity check on the input at all. add_utf32
1281 now replaces invalid Unicode codepoints with the replacement
1282 character (see below).
1283 * hb_buffer_set_replacement_codepoint()
1284 * hb_buffer_get_replacement_codepoint()
1285 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
1286 we detected broken input, we replaced that with (hb_codepoint_t)-1.
1287 This has changed to use U+FFFD now, but can be changed using these
1291 Overview of changes leading to 0.9.30
1292 Wednesday, July 9, 2014
1293 =====================================
1295 - Update to Unicode 7.0.0:
1296 * New scripts Manichaean and Psalter Pahlavi are shaped using
1298 * All the other new scripts to through the generic shaper for
1300 - Minor Indic improvements.
1301 - Fix graphite2 backend cluster mapping [crasher!]
1303 * New HB_SCRIPT_* values for Unicode 7.0 scripts.
1304 * New function hb_ot_layout_language_get_required_feature().
1308 Overview of changes leading to 0.9.29
1309 Thursday, May 29, 2014
1310 =====================================
1312 - Implement cmap in hb-ot-font.h. No variation-selectors yet.
1313 - Myanmar: Allow MedialYa+Asat.
1314 - Various Indic fixes:
1315 * Support most characters in Extended Devanagary and Vedic
1317 * Allow digits and a some punctuation as consonant placeholders.
1321 Overview of changes leading to 0.9.28
1322 Monday, April 28, 2014
1323 =====================================
1325 - Unbreak old-spec Indic shaping. (bug 76705)
1326 - Fix shaping of U+17DD and U+0FC6.
1327 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
1328 for shipping libraries. It's an option for further experimentation
1329 right now. When we are sure how to do it properly, we will add
1330 public run-time API for the functionality.
1334 Overview of changes leading to 0.9.27
1335 Tuesday, March 18, 2014
1336 =====================================
1338 - Don't use "register" storage class specifier
1339 - Wrap definition of free_langs() with HAVE_ATEXIT
1340 - Add coretext_aat shaper and hb_coretext_face_create() constructor
1341 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
1342 - Add Myanmar test case from OpenType Myanmar spec
1343 - Only do fallback Hebrew composition if no GPOS 'mark' available
1344 - Allow bootstrapping without gtk-doc
1345 - Use AM_MISSING_PROG for ragel and git
1346 - Typo in ucdn's Makefile.am
1347 - Improve MemoryBarrier() implementation
1350 Overview of changes leading to 0.9.26
1351 Thursday, January 30, 2014
1352 =====================================
1355 - Fix application of 'rtlm' feature.
1356 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
1357 - New header: hb-ot-shape.h
1358 - Uniscribe: fix scratch-buffer accounting.
1359 - Reorder Tai Tham SAKOT to after tone-marks.
1360 - Add Hangul shaper.
1362 hb-ot-shape-complex-hangul.cc
1363 hb-ot-shape-complex-hebrew.cc
1364 hb-ot-shape-complex-tibetan.cc
1365 - Disable 'cswh' feature in Arabic shaper.
1366 - Coretext: better handle surrogate pairs.
1367 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
1370 Overview of changes leading to 0.9.25
1371 Wednesday, December 4, 2013
1372 =====================================
1374 - Myanmar shaper improvements.
1375 - Avoid font fallback in CoreText backend.
1376 - Additional OpenType language tag mappiongs.
1377 - More aggressive shape-plan caching.
1378 - Build with / require automake 1.13.
1379 - Build with libtool 2.4.2.418 alpha to support ppc64le.
1382 Overview of changes leading to 0.9.24
1383 Tuesday, November 13, 2013
1384 =====================================
1386 - Misc compiler warning fixes with clang.
1387 - No functional changes.
1390 Overview of changes leading to 0.9.23
1391 Monday, October 28, 2013
1392 =====================================
1394 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
1395 - Fix (Chain)Context recursion with non-monotone lookup positions.
1396 - Misc Indic bug fixes.
1397 - New Javanese / Buginese shaping, similar to Windows 8.1.
1400 Overview of changes leading to 0.9.22
1401 Thursday, October 3, 2013
1402 =====================================
1404 - Fix use-after-end-of-scope in hb_language_from_string().
1405 - Fix hiding of default_ignorables if font doesn't have space glyph.
1406 - Protect against out-of-range lookup indices.
1410 * Added hb_ot_layout_table_get_lookup_count()
1413 Overview of changes leading to 0.9.21
1414 Monday, September 16, 2013
1415 =====================================
1417 - Rename gobject-introspection library name from harfbuzz to HarfBuzz.
1418 - Remove (long disabled) hb-old and hb-icu-le test shapers.
1419 - Misc gtk-doc and gobject-introspection annotations.
1423 * Add HB_SET_VALUE_INVALID
1425 Overview of changes leading to 0.9.20
1426 Thursday, August 29, 2013
1427 =====================================
1430 - Misc substitute_closure() fixes.
1434 - gtk-doc boilerplate integrated. Docs are built now, but
1435 contain no contents. By next release hopefully we have
1436 some content in. Enable using --enable-gtk-doc.
1438 GObject and Introspection:
1439 - Added harfbuzz-gobject library (hb-gobject.h) that has type
1440 bindings for all HarfBuzz objects and enums. Enable using
1442 - Added gobject-introspection boilerplate. Nothing useful
1443 right now. Work in progress. Gets enabled automatically if
1444 --with-gobject is used. Override with --disable-introspection.
1447 - Apply 'mark' in Myanmar shaper.
1448 - Don't apply 'dlig' by default.
1451 - Support user features.
1452 - Fix loading of fonts that are also installed on the system.
1453 - Fix shaping of Arabic Presentation Forms.
1454 - Fix build with wide chars.
1457 - Support user features.
1460 - hb_face_t code moved to hb-face.h / hb-face.cc.
1461 - Added hb-deprecated.h.
1464 - Added HB_DISABLE_DEPRECATED.
1465 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
1466 HB_SCRIPT_CANADIAN_SYLLABICS.
1467 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
1468 HB_BUFFER_FLAG_DEFAULT.
1469 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
1470 HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
1473 Overview of changes leading to 0.9.19
1474 Tuesday, July 16, 2013
1475 =====================================
1478 - Better handling of multiple variation selectors in a row.
1479 - Pass on variation selector to GSUB if not consumed by cmap.
1480 - Fix undefined memory access.
1481 - Add Javanese config to Indic shaper.
1484 Overview of changes leading to 0.9.18
1485 Tuesday, May 28, 2013
1486 =====================================
1490 - All unneeded code is all disabled by default,
1492 - Uniscribe and CoreText shapers can be enabled with their --with options,
1494 - icu_le and old shapers cannot be enabled for now,
1496 - glib, freetype, and cairo will be detected automatically.
1497 They can be force on/off'ed with their --with options,
1499 - icu and graphite2 are default off, can be enabled with their --with
1502 Moreover, ICU support is now build into a separate library:
1503 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
1504 Distros can enable ICU now without every application on earth
1505 getting linked to via libharfbuzz.so.
1507 For distros I recommend that they make sure they are building --with-glib
1508 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
1509 And package harfbuzz and harfbuzz-icu separately.
1512 Overview of changes leading to 0.9.17
1513 Monday, May 20, 2013
1514 =====================================
1517 - Fix bug in hb_set_get_min().
1518 - Fix regression with Arabic mark positioning / width-zeroing.
1520 Overview of changes leading to 0.9.16
1521 Friday, April 19, 2013
1522 =====================================
1524 - Major speedup in OpenType lookup processing. With the Amiri
1525 Arabic font, this release is over 3x faster than previous
1526 release. All scripts / languages should see this speedup.
1528 - New --num-iterations option for hb-shape / hb-view; useful for
1531 Overview of changes leading to 0.9.15
1532 Friday, April 05, 2013
1533 =====================================
1536 - Fix crasher in graphite2 shaper.
1537 - Fix Arabic mark width zeroing regression.
1538 - Don't compose Hangul jamo into Unicode syllables.
1541 Overview of changes leading to 0.9.14
1542 Thursday, March 21, 2013
1543 =====================================
1546 - Fix time-consuming sanitize with malicious fonts.
1547 - Implement hb_buffer_deserialize_glyphs() for both json and text.
1548 - Do not ignore Hangul filler characters.
1550 * Fix Malayalam pre-base reordering interaction with post-forms.
1551 * Further adjust ZWJ handling. Should fix known regressions from
1555 Overview of changes leading to 0.9.13
1556 Thursday, February 25, 2013
1557 =====================================
1560 - Ngapi HarfBuzz Hackfest in London (February 2013):
1561 * Fixed all known Indic bugs,
1562 * New Win8-style Myanmar shaper,
1563 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
1564 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
1565 matching GSUB/GPOS lookups,
1566 * Fix 'Phags-Pa U+A872 shaping,
1567 * Fix partial disabling of default-on features,
1568 * Allow disabling of TrueType kerning.
1569 - Fix possible crasher with broken fonts with overlapping tables.
1570 - Removed generated files from git again. So, one needs ragel to
1571 bootstrap from the git tree.
1574 - hb_shape() and related APIs now abort if buffer direction is
1575 HB_DIRECTION_INVALID. Previously, hb_shape() was calling
1576 hb_buffer_guess_segment_properties() on the buffer before
1577 shaping. The heuristics in that function are fragile. If the
1578 user really wants the old behvaior, they can call that function
1579 right before calling hb_shape() to get the old behavior.
1580 - hb_blob_create_sub_blob() always creates sub-blob with
1581 HB_MEMORY_MODE_READONLY. See comments for the reason.
1584 Overview of changes leading to 0.9.12
1585 Thursday, January 18, 2013
1586 =====================================
1588 - Build fixes for Sun compiler.
1591 Overview of changes leading to 0.9.11
1592 Thursday, January 10, 2013
1593 =====================================
1596 - Fix GPOS mark attachment with null Anchor offsets.
1597 - [Indic] Fix old-spec reordering of viramas if sequence ends in one.
1598 - Fix multi-threaded shaper data creation crash.
1599 - Add atomic ops for Solaris.
1602 - Rename hb_buffer_clear() to hb_buffer_clear_contents().
1605 Overview of changes leading to 0.9.10
1606 Thursday, January 3, 2013
1607 =====================================
1609 - [Indic] Fixed rendering of Malayalam dot-reph
1610 - Updated OT language tags.
1611 - Updated graphite2 backend.
1612 - Improved hb_ot_layout_get_size_params() logic.
1613 - Improve hb-shape/hb-view help output.
1614 - Fixed hb-set.h implementation to not crash.
1615 - Fixed various issues with hb_ot_layout_collect_lookups().
1616 - Various build fixes.
1620 hb_graphite2_face_get_gr_face()
1621 hb_graphite2_font_get_gr_font()
1622 hb_coretext_face_get_cg_font()
1626 hb_ot_layout_get_size_params()
1629 Overview of changes leading to 0.9.9
1630 Wednesday, December 5, 2012
1631 ====================================
1633 - Fix build on Windows.
1634 - Minor improvements.
1637 Overview of changes leading to 0.9.8
1638 Tuesday, December 4, 2012
1639 ====================================
1642 - Actually implement hb_shape_plan_get_shaper ().
1643 - Make UCDB data tables const.
1644 - Lots of internal refactoring in OTLayout tables.
1645 - Flesh out hb_ot_layout_lookup_collect_glyphs().
1649 hb_ot_layout_collect_lookups()
1650 hb_ot_layout_get_size_params()
1653 Overview of changes leading to 0.9.7
1654 Sunday, November 21, 2012
1655 ====================================
1658 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
1660 - Fix Arabic contextual joining using pre-context text.
1661 - Fix Sinhala "split matra" mess.
1662 - Fix Khmer shaping with broken fonts.
1663 - Implement Thai "PUA" shaping for old fonts.
1664 - Do NOT route Kharoshthi script through the Indic shaper.
1665 - Disable fallback positioning for Indic and Thai shapers.
1669 hb-shape / hb-view changes:
1671 - Add --text-before and --text-after
1672 - Add --bot / --eot / --preserve-default-ignorables
1673 - hb-shape --output-format=json
1682 HB_BUFFER_FLAGS_DEFAULT
1685 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
1687 hb_buffer_set_flags()
1688 hb_buffer_get_flags()
1690 HB_BUFFER_SERIALIZE_FLAGS
1691 hb_buffer_serialize_glyphs()
1692 hb_buffer_deserialize_glyphs()
1693 hb_buffer_serialize_list_formats()
1697 hb_set_get_population()
1700 hb_face_[sg]et_glyph_count()
1702 hb_segment_properties_t
1703 HB_SEGMENT_PROPERTIES_DEFAULT
1704 hb_segment_properties_equal()
1705 hb_segment_properties_hash()
1707 hb_buffer_set_segment_properties()
1708 hb_buffer_get_segment_properties()
1710 hb_ot_layout_glyph_class_t
1711 hb_ot_layout_get_glyph_class()
1712 hb_ot_layout_get_glyphs_in_class()
1715 hb_shape_plan_create()
1716 hb_shape_plan_create_cached()
1717 hb_shape_plan_get_empty()
1718 hb_shape_plan_reference()
1719 hb_shape_plan_destroy()
1720 hb_shape_plan_set_user_data()
1721 hb_shape_plan_get_user_data()
1722 hb_shape_plan_execute()
1723 hb_shape_plan_get_shaper()
1725 hb_ot_shape_plan_collect_lookups()
1730 - Remove "mask" parameter from hb_buffer_add().
1731 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
1732 - hb-set.h API const correction.
1733 - Renamed hb_set_min/max() to hb_set_get_min/max().
1734 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
1735 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
1739 Overview of changes leading to 0.9.6
1740 Sunday, November 13, 2012
1741 ====================================
1743 - Don't clear pre-context text if no new context is provided.
1744 - Fix ReverseChainingSubstLookup, which was totally borked.
1745 - Adjust output format of hb-shape a bit.
1746 - Include config.h.in in-tree. Makes it easier for alternate build systems.
1747 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
1748 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
1749 - Drop glyphs for all of Unicode Default_Ignorable characters.
1753 - Enable 'dlig' and 'mset' features in Arabic shaper.
1754 - Implement 'Phags-pa shaping, improve Mongolian.
1757 - Decompose Sinhala split matras the way old HarfBuzz / Pango did.
1758 - Initial support for Consonant Medials.
1759 - Start adding new-style Myanmar shaping.
1760 - Make reph and 'pref' logic introspect the font.
1761 - Route Meetei-Mayek through the Indic shaper.
1762 - Don't apply 'liga' in Indic shaper.
1763 - Improve Malayalam pre-base reordering Ra interaction with Chillus.
1767 Overview of changes leading to 0.9.5
1768 Sunday, October 14, 2012
1769 ====================================
1771 - Synthetic-GSUB Arabic fallback shaping.
1773 - Misc Indic improvements.
1775 - Add build system support for pthread.
1777 - Imported UCDN for in-tree Unicode callbacks implementation.
1779 - Context-aware Arabic joining.
1785 hb_feature_to/from-string()
1786 hb_buffer_[sg]et_content_type()
1790 Overview of changes leading to 0.9.4
1791 Tuesday, Sep 03, 2012
1792 ====================================
1794 - Indic improvements with old-spec Malayalam.
1796 - Better fallback glyph positioning, specially with Thai / Lao marks.
1798 - Implement dotted-circle insertion.
1800 - Better Arabic fallback shaping / ligation.
1802 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
1808 Overview of changes leading to 0.9.3
1809 Friday, Aug 18, 2012
1810 ====================================
1812 - Fixed fallback mark positioning for left-to-right text.
1814 - Improve mark positioning for the remaining combining classes.
1816 - Unbreak Thai and fallback Arabic shaping.
1818 - Port Arabic shaper to shape-plan caching.
1820 - Use new ICU normalizer functions.
1824 Overview of changes leading to 0.9.2
1825 Friday, Aug 10, 2012
1826 ====================================
1828 - Over a thousand commits! This is the first major release of HarfBuzz.
1830 - HarfBuzz is feature-complete now! It should be in par, or better, than
1831 both Pango's shapers and old HarfBuzz / Qt shapers.
1833 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
1835 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
1836 Sinhala, N'ko, Mongolian, and Mandaic.
1838 - New Thai / Lao shaper.
1840 - Tibetan / Hangul support in the generic shaper.
1842 - Synthetic GDEF support for fonts without a GDEF table.
1844 - Fallback mark positioning for fonts without a GPOS table.
1846 - Unicode normalization shaping heuristic during glyph mapping.
1848 - New experimental Graphite2 backend.
1850 - New Uniscribe backend (primarily for testing).
1852 - New CoreText backend (primarily for testing).
1854 - Major optimization and speedup.
1856 - Test suites and testing infrastructure (work in progress).
1858 - Greatly improved hb-view cmdline tool.
1860 - hb-shape cmdline tool.
1862 - Unicode 6.1 support.
1864 Summary of API changes:
1868 - Users are expected to only include main header files now (ie. hb.h,
1869 hb-glib.h, hb-ft.h, ...)
1871 - All struct tag names had their initial underscore removed.
1872 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
1874 - All set_user_data() functions now take a "replace" boolean parameter.
1876 - hb_buffer_create() takes zero arguments now.
1877 Use hb_buffer_pre_allocate() to pre-allocate.
1879 - hb_buffer_add_utf*() now accept -1 for length parameteres,
1880 meaning "nul-terminated".
1882 - hb_direction_t enum values changed.
1884 - All *_from_string() APIs now take a length parameter to allow for
1885 non-nul-terminated strings. A -1 length means "nul-terminated".
1887 - Typedef for hb_language_t changed.
1889 - hb_get_table_func_t renamed to hb_reference_table_func_t.
1891 - hb_ot_layout_table_choose_script()
1893 - Various renames in hb-unicode.h.
1897 - hb_buffer_guess_properties()
1898 Automatically called by hb_shape().
1900 - hb_buffer_normalize_glyphs()
1902 - hb_tag_from_string()
1908 - hb_face_reference_blob()
1909 - hb_face_[sg]et_index()
1910 - hb_face_set_upem()
1912 - hb_font_get_glyph_name_func_t
1913 hb_font_get_glyph_from_name_func_t
1914 hb_font_funcs_set_glyph_name_func()
1915 hb_font_funcs_set_glyph_from_name_func()
1916 hb_font_get_glyph_name()
1917 hb_font_get_glyph_from_name()
1918 hb_font_glyph_to_string()
1919 hb_font_glyph_from_string()
1921 - hb_font_set_funcs_data()
1923 - hb_ft_font_set_funcs()
1924 - hb_ft_font_get_face()
1926 - hb-gobject.h (work in progress)
1928 - hb_ot_shape_glyphs_closure()
1929 hb_ot_layout_substitute_closure_lookup()
1935 - hb_unicode_combining_class_t
1937 - hb_unicode_compose_func_t
1938 hb_unicode_decompose_func_t
1939 hb_unicode_decompose_compatibility_func_t
1940 hb_unicode_funcs_set_compose_func()
1941 hb_unicode_funcs_set_decompose_func()
1942 hb_unicode_funcs_set_decompose_compatibility_func()
1943 hb_unicode_compose()
1944 hb_unicode_decompose()
1945 hb_unicode_decompose_compatibility()
1949 - hb_ft_get_font_funcs()
1951 - hb_ot_layout_substitute_start()
1952 hb_ot_layout_substitute_lookup()
1953 hb_ot_layout_substitute_finish()
1954 hb_ot_layout_position_start()
1955 hb_ot_layout_position_lookup()
1956 hb_ot_layout_position_finish()
1960 Overview of changes leading to 0.6.0
1961 Friday, May 27, 2011
1962 ====================================
1964 - Vertical text support in GPOS
1965 - Almost all API entries have unit tests now, under test/
1966 - All thread-safety issues are fixed
1968 Summary of API changes follows.
1975 hb_language_get_default()
1976 hb_direction_to_string()
1977 hb_direction_from_string()
1978 hb_script_get_horizontal_direction()
1982 hb_category_t renamed to hb_unicode_general_category_t
1985 hb_language_t is a typed pointers now
1991 * Use ISO 15924 tags for hb_script_t:
1994 hb_script_from_iso15924_tag()
1995 hb_script_to_iso15924_tag()
1996 hb_script_from_string()
1999 HB_SCRIPT_* enum members changed value.
2002 * Buffer API streamlined:
2006 hb_buffer_set_length()
2007 hb_buffer_allocation_successful()
2010 hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
2011 hb_buffer_add_glyph() renamed to hb_buffer_add()
2015 hb_buffer_clear_positions()
2018 hb_buffer_get_glyph_infos() takes an out length parameter now
2019 hb_buffer_get_glyph_positions() takes an out length parameter now
2022 * Blob API streamlined:
2026 hb_blob_get_data_writable()
2029 hb_blob_create_empty() renamed to hb_blob_get_empty()
2034 hb_blob_is_writable()
2035 hb_blob_try_writable()
2038 hb_blob_create() takes user_data before destroy now
2041 * Unicode functions API:
2043 o Unicode function vectors can subclass other unicode function vectors now.
2044 Unimplemented callbacks in the subclass automatically chainup to the parent.
2046 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
2047 take a user_data and its respective destroy callback.
2050 hb_unicode_funcs_get_empty()
2051 hb_unicode_funcs_get_default()
2052 hb_unicode_funcs_get_parent()
2055 hb_unicode_funcs_create() now takes a parent_funcs.
2057 o Removed func getter functions:
2058 hb_unicode_funcs_get_mirroring_func()
2059 hb_unicode_funcs_get_general_category_func()
2060 hb_unicode_funcs_get_script_func()
2061 hb_unicode_funcs_get_combining_class_func()
2062 hb_unicode_funcs_get_eastasian_width_func()
2068 hb_face_get_table() renamed to hb_face_reference_table()
2069 hb_face_create_for_data() renamed to hb_face_create()
2072 hb_face_create_for_tables() takes user_data before destroy now
2073 hb_face_reference_table() returns empty blob instead of NULL
2074 hb_get_table_func_t accepts the face as first parameter now
2078 o Fonts can subclass other fonts now. Unimplemented callbacks in the
2079 subclass automatically chainup to the parent. When chaining up,
2080 scale is adjusted if the parent font has a different scale.
2082 o All hb_font_funcs_t callbacks take a user_data now. Their setters
2083 take a user_data and its respective destroy callback.
2086 hb_font_get_parent()
2087 hb_font_funcs_get_empty()
2088 hb_font_create_sub_font()
2091 hb_font_funcs_copy()
2092 hb_font_unset_funcs()
2094 o Removed func getter functions:
2095 hb_font_funcs_get_glyph_func()
2096 hb_font_funcs_get_glyph_advance_func()
2097 hb_font_funcs_get_glyph_extents_func()
2098 hb_font_funcs_get_contour_point_func()
2099 hb_font_funcs_get_kerning_func()
2102 hb_font_create() takes a face and references it now
2103 hb_font_set_funcs() takes user_data before destroy now
2104 hb_font_set_scale() accepts signed integers now
2105 hb_font_get_contour_point_func_t now takes glyph first, then point_index
2106 hb_font_get_glyph_func_t returns a success boolean now
2109 * Changed object model:
2111 o All object types have a _get_empty() now:
2113 hb_buffer_get_empty()
2116 hb_font_funcs_get_empty()
2117 hb_unicode_funcs_get_empty()
2119 o Added _set_user_data() and _get_user_data() for all object types:
2120 hb_blob_get_user_data()
2121 hb_blob_set_user_data()
2122 hb_buffer_get_user_data()
2123 hb_buffer_set_user_data()
2124 hb_face_get_user_data()
2125 hb_face_set_user_data()
2126 hb_font_funcs_get_user_data()
2127 hb_font_funcs_set_user_data()
2128 hb_font_get_user_data()
2129 hb_font_set_user_data()
2130 hb_unicode_funcs_get_user_data()
2131 hb_unicode_funcs_set_user_data()
2133 o Removed the _get_reference_count() from all object types:
2134 hb_blob_get_reference_count()
2135 hb_buffer_get_reference_count()
2136 hb_face_get_reference_count()
2137 hb_font_funcs_get_reference_count()
2138 hb_font_get_reference_count()
2139 hb_unicode_funcs_get_reference_count()
2141 o Added _make_immutable() and _is_immutable() for all object types except for buffer:
2142 hb_blob_make_immutable()
2143 hb_blob_is_immutable()
2144 hb_face_make_immutable()
2145 hb_face_is_immutable()
2148 * Changed API for vertical text support
2150 o The following callbacks where removed:
2151 hb_font_get_glyph_advance_func_t
2152 hb_font_get_kerning_func_t
2154 o The following new callbacks added instead:
2155 hb_font_get_glyph_h_advance_func_t
2156 hb_font_get_glyph_v_advance_func_t
2157 hb_font_get_glyph_h_origin_func_t
2158 hb_font_get_glyph_v_origin_func_t
2159 hb_font_get_glyph_h_kerning_func_t
2160 hb_font_get_glyph_v_kerning_func_t
2162 o The following API removed as such:
2163 hb_font_funcs_set_glyph_advance_func()
2164 hb_font_funcs_set_kerning_func()
2165 hb_font_get_glyph_advance()
2166 hb_font_get_kerning()
2168 o New API added instead:
2169 hb_font_funcs_set_glyph_h_advance_func()
2170 hb_font_funcs_set_glyph_v_advance_func()
2171 hb_font_funcs_set_glyph_h_origin_func()
2172 hb_font_funcs_set_glyph_v_origin_func()
2173 hb_font_funcs_set_glyph_h_kerning_func()
2174 hb_font_funcs_set_glyph_v_kerning_func()
2175 hb_font_get_glyph_h_advance()
2176 hb_font_get_glyph_v_advance()
2177 hb_font_get_glyph_h_origin()
2178 hb_font_get_glyph_v_origin()
2179 hb_font_get_glyph_h_kerning()
2180 hb_font_get_glyph_v_kerning()
2182 o The following higher-leve API added for convenience:
2183 hb_font_get_glyph_advance_for_direction()
2184 hb_font_get_glyph_origin_for_direction()
2185 hb_font_add_glyph_origin_for_direction()
2186 hb_font_subtract_glyph_origin_for_direction()
2187 hb_font_get_glyph_kerning_for_direction()
2188 hb_font_get_glyph_extents_for_origin()
2189 hb_font_get_glyph_contour_point_for_origin()
2192 * OpenType Layout API:
2195 hb_ot_layout_position_start()
2196 hb_ot_layout_substitute_start()
2197 hb_ot_layout_substitute_finish()
2203 hb_glib_script_to_script()
2204 hb_glib_script_from_script()
2205 hb_icu_script_to_script()
2206 hb_icu_script_from_script()
2209 * Version API added: