1 Overview of changes leading to 0.9.35
2 Saturday, August 13, 2014
3 =====================================
5 - Fix major shape-plan caching bug when more than one shaper were
6 provided to hb_shape_full() (as exercised by XeTeX).
7 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
8 - Fix Arabic fallback shaping regression. This was broken in 0.9.32.
9 - Major hb-coretext fixes. That backend is complete now, including
10 respecing buffer direction and language, down to vertical writing.
11 - Build fixes for Windows CE. Should build fine now.
13 Use atexit() only if it's safe to call from shared library
14 https://bugs.freedesktop.org/show_bug.cgi?id=82246
15 Mandaic had errors in its Unicode Joining_Type
16 https://bugs.freedesktop.org/show_bug.cgi?id=82306
19 * hb_buffer_clear_contents() does not reset buffer flags now.
21 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
22 need to set flags for different pieces of text. The flags now
23 are something the client sets up once, depending on how it
24 actually uses the buffer. As such, don't clear it in
27 I don't expect any changes to be needed to any existing client.
30 Overview of changes leading to 0.9.34
31 Saturday, August 2, 2014
32 =====================================
34 - hb_feature_from_string() now accepts CSS font-feature-settings format.
35 - As a result, hb-shape / hb-view --features also accept CSS-style strings.
36 Eg, "'liga' off" is accepted now.
37 - Add old-spec Myanmar shaper:
38 https://bugs.freedesktop.org/show_bug.cgi?id=81775
39 - Don't apply 'calt' in Hangul shaper.
40 - Fix mark advance zeroing for Hebrew shaper:
41 https://bugs.freedesktop.org/show_bug.cgi?id=76767
42 - Implement Windows-1256 custom Arabic shaping. Only built on Windows,
43 and requires help from get_glyph(). Used by Firefox.
44 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
45 - Disable 'liga' in vertical text.
49 * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
51 Previously, we expected users to provide BOT/EOT flags when the
52 text *segment* was at paragraph boundaries. This meant that for
53 clients that provide full paragraph to HarfBuzz (eg. Pango), they
56 hb_buffer_set_flags (hb_buffer,
57 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
58 (item_offset + item_length == paragraph_length ?
59 HB_BUFFER_FLAG_EOT : 0));
61 hb_buffer_add_utf8 (hb_buffer,
62 paragraph_text, paragraph_length,
63 item_offset, item_length);
65 After this change such clients can simply say:
67 hb_buffer_set_flags (hb_buffer,
68 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
70 hb_buffer_add_utf8 (hb_buffer,
71 paragraph_text, paragraph_length,
72 item_offset, item_length);
74 Ie, HarfBuzz itself checks whether the segment is at the beginning/end
75 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
76 continue not setting any flags whatsoever.
78 Another way to put it is: if there's pre-context text in the buffer,
79 HarfBuzz ignores the BOT flag. If there's post-context, it ignores
83 Overview of changes leading to 0.9.32
84 Thursday, July 17, 2014
85 =====================================
87 - Apply Arabic shaping features in spec order exactly.
88 - Another fix for Mongolian free variation selectors.
89 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
91 - Minor adjustment to U+FFFD logic.
92 - Fix hb-coretext build.
95 Overview of changes leading to 0.9.31
96 Wednesday, July 16, 2014
97 =====================================
99 - Only accept valid UTF-8/16/32; we missed many cases before.
100 - Better shaping of invalid UTF-8/16/32. Falls back to
101 U+FFFD REPLACEMENT CHARACTER now.
102 - With all changes in this release, the buffer will contain fully
103 valid Unicode after hb_buffer_add_utf8/16/32 no matter how
104 broken the input is. This can be overriden though. See below.
105 - Fix Mongolian Variation Selectors for fonts without GDEF.
106 - Fix minor invalid buffer access.
107 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language()
108 now uses these instead of private tags.
111 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
112 used to do, ie. no validity check on the input at all. add_utf32
113 now replaces invalid Unicode codepoints with the replacement
114 character (see below).
115 * hb_buffer_set_replacement_codepoint()
116 * hb_buffer_get_replacement_codepoint()
117 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
118 we detected broken input, we replaced that with (hb_codepoint_t)-1.
119 This has changed to use U+FFFD now, but can be changed using these
123 Overview of changes leading to 0.9.30
124 Wednesday, July 9, 2014
125 =====================================
127 - Update to Unicode 7.0.0:
128 * New scripts Manichaean and Psalter Pahlavi are shaped using
130 * All the other new scripts to through the generic shaper for
132 - Minor Indic improvements.
133 - Fix graphite2 backend cluster mapping [crasher!]
135 * New HB_SCRIPT_* values for Unicode 7.0 scripts.
136 * New function hb_ot_layout_language_get_required_feature().
140 Overview of changes leading to 0.9.29
141 Thursday, May 29, 2014
142 =====================================
144 - Implement cmap in hb-ot-font.h. No variation-selectors yet.
145 - Myanmar: Allow MedialYa+Asat.
146 - Various Indic fixes:
147 * Support most characters in Extended Devanagary and Vedic
149 * Allow digits and a some punctuation as consonant placeholders.
153 Overview of changes leading to 0.9.28
154 Monday, April 28, 2014
155 =====================================
157 - Unbreak old-spec Indic shaping. (bug 76705)
158 - Fix shaping of U+17DD and U+0FC6.
159 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
160 for shipping libraries. It's an option for further experimentation
161 right now. When we are sure how to do it properly, we will add
162 public run-time API for the functionality.
166 Overview of changes leading to 0.9.27
167 Tuesday, March 18, 2014
168 =====================================
170 - Don't use "register" storage class specifier
171 - Wrap definition of free_langs() with HAVE_ATEXIT
172 - Add coretext_aat shaper and hb_coretext_face_create() constructor
173 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
174 - Add Myanmar test case from OpenType Myanmar spec
175 - Only do fallback Hebrew composition if no GPOS 'mark' available
176 - Allow bootstrapping without gtk-doc
177 - Use AM_MISSING_PROG for ragel and git
178 - Typo in ucdn's Makefile.am
179 - Improve MemoryBarrier() implementation
182 Overview of changes leading to 0.9.26
183 Thursday, January 30, 2014
184 =====================================
187 - Fix application of 'rtlm' feature.
188 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
189 - New header: hb-ot-shape.h
190 - Uniscribe: fix scratch-buffer accounting.
191 - Reorder Tai Tham SAKOT to after tone-marks.
194 hb-ot-shape-complex-hangul.cc
195 hb-ot-shape-complex-hebrew.cc
196 hb-ot-shape-complex-tibetan.cc
197 - Disable 'cswh' feature in Arabic shaper.
198 - Coretext: better handle surrogate pairs.
199 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
202 Overview of changes leading to 0.9.25
203 Wednesday, December 4, 2013
204 =====================================
206 - Myanmar shaper improvements.
207 - Avoid font fallback in CoreText backend.
208 - Additional OpenType language tag mappiongs.
209 - More aggressive shape-plan caching.
210 - Build with / require automake 1.13.
211 - Build with libtool 2.4.2.418 alpha to support ppc64le.
214 Overview of changes leading to 0.9.24
215 Tuesday, November 13, 2013
216 =====================================
218 - Misc compiler warning fixes with clang.
219 - No functional changes.
222 Overview of changes leading to 0.9.23
223 Monday, October 28, 2013
224 =====================================
226 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
227 - Fix (Chain)Context recursion with non-monotone lookup positions.
228 - Misc Indic bug fixes.
229 - New Javanese / Buginese shaping, similar to Windows 8.1.
232 Overview of changes leading to 0.9.22
233 Thursday, October 3, 2013
234 =====================================
236 - Fix use-after-end-of-scope in hb_language_from_string().
237 - Fix hiding of default_ignorables if font doesn't have space glyph.
238 - Protect against out-of-range lookup indices.
242 * Added hb_ot_layout_table_get_lookup_count()
245 Overview of changes leading to 0.9.21
246 Monday, September 16, 2013
247 =====================================
249 - Rename gobject-introspection library name from harfbuzz to HarfBuzz.
250 - Remove (long disabled) hb-old and hb-icu-le test shapers.
251 - Misc gtk-doc and gobject-introspection annotations.
255 * Add HB_SET_VALUE_INVALID
257 Overview of changes leading to 0.9.20
258 Thursday, August 29, 2013
259 =====================================
262 - Misc substitute_closure() fixes.
266 - gtk-doc boilerplate integrated. Docs are built now, but
267 contain no contents. By next release hopefully we have
268 some content in. Enable using --enable-gtk-doc.
270 GObject and Introspection:
271 - Added harfbuzz-gobject library (hb-gobject.h) that has type
272 bindings for all HarfBuzz objects and enums. Enable using
274 - Added gobject-introspection boilerplate. Nothing useful
275 right now. Work in progress. Gets enabled automatically if
276 --with-gobject is used. Override with --disable-introspection.
279 - Apply 'mark' in Myanmar shaper.
280 - Don't apply 'dlig' by default.
283 - Support user features.
284 - Fix loading of fonts that are also installed on the system.
285 - Fix shaping of Arabic Presentation Forms.
286 - Fix build with wide chars.
289 - Support user features.
292 - hb_face_t code moved to hb-face.h / hb-face.cc.
293 - Added hb-deprecated.h.
296 - Added HB_DISABLE_DEPRECATED.
297 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
298 HB_SCRIPT_CANADIAN_SYLLABICS.
299 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
300 HB_BUFFER_FLAG_DEFAULT.
301 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
302 HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
305 Overview of changes leading to 0.9.19
306 Tuesday, July 16, 2013
307 =====================================
310 - Better handling of multiple variation selectors in a row.
311 - Pass on variation selector to GSUB if not consumed by cmap.
312 - Fix undefined memory access.
313 - Add Javanese config to Indic shaper.
316 Overview of changes leading to 0.9.18
317 Tuesday, May 28, 2013
318 =====================================
322 - All unneeded code is all disabled by default,
324 - Uniscribe and CoreText shapers can be enabled with their --with options,
326 - icu_le and old shapers cannot be enabled for now,
328 - glib, freetype, and cairo will be detected automatically.
329 They can be force on/off'ed with their --with options,
331 - icu and graphite2 are default off, can be enabled with their --with
334 Moreover, ICU support is now build into a separate library:
335 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
336 Distros can enable ICU now without every application on earth
337 getting linked to via libharfbuzz.so.
339 For distros I recommend that they make sure they are building --with-glib
340 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
341 And package harfbuzz and harfbuzz-icu separately.
344 Overview of changes leading to 0.9.17
346 =====================================
349 - Fix bug in hb_set_get_min().
350 - Fix regression with Arabic mark positioning / width-zeroing.
352 Overview of changes leading to 0.9.16
353 Friday, April 19, 2013
354 =====================================
356 - Major speedup in OpenType lookup processing. With the Amiri
357 Arabic font, this release is over 3x faster than previous
358 release. All scripts / languages should see this speedup.
360 - New --num-iterations option for hb-shape / hb-view; useful for
363 Overview of changes leading to 0.9.15
364 Friday, April 05, 2013
365 =====================================
368 - Fix crasher in graphite2 shaper.
369 - Fix Arabic mark width zeroing regression.
370 - Don't compose Hangul jamo into Unicode syllables.
373 Overview of changes leading to 0.9.14
374 Thursday, March 21, 2013
375 =====================================
378 - Fix time-consuming sanitize with malicious fonts.
379 - Implement hb_buffer_deserialize_glyphs() for both json and text.
380 - Do not ignore Hangul filler characters.
382 * Fix Malayalam pre-base reordering interaction with post-forms.
383 * Further adjust ZWJ handling. Should fix known regressions from
387 Overview of changes leading to 0.9.13
388 Thursday, February 25, 2013
389 =====================================
392 - Ngapi HarfBuzz Hackfest in London (February 2013):
393 * Fixed all known Indic bugs,
394 * New Win8-style Myanmar shaper,
395 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
396 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
397 matching GSUB/GPOS lookups,
398 * Fix 'Phags-Pa U+A872 shaping,
399 * Fix partial disabling of default-on features,
400 * Allow disabling of TrueType kerning.
401 - Fix possible crasher with broken fonts with overlapping tables.
402 - Removed generated files from git again. So, one needs ragel to
403 bootstrap from the git tree.
406 - hb_shape() and related APIs now abort if buffer direction is
407 HB_DIRECTION_INVALID. Previously, hb_shape() was calling
408 hb_buffer_guess_segment_properties() on the buffer before
409 shaping. The heuristics in that function are fragile. If the
410 user really wants the old behvaior, they can call that function
411 right before calling hb_shape() to get the old behavior.
412 - hb_blob_create_sub_blob() always creates sub-blob with
413 HB_MEMORY_MODE_READONLY. See comments for the reason.
416 Overview of changes leading to 0.9.12
417 Thursday, January 18, 2013
418 =====================================
420 - Build fixes for Sun compiler.
423 Overview of changes leading to 0.9.11
424 Thursday, January 10, 2013
425 =====================================
428 - Fix GPOS mark attachment with null Anchor offsets.
429 - [Indic] Fix old-spec reordering of viramas if sequence ends in one.
430 - Fix multi-threaded shaper data creation crash.
431 - Add atomic ops for Solaris.
434 - Rename hb_buffer_clear() to hb_buffer_clear_contents().
437 Overview of changes leading to 0.9.10
438 Thursday, January 3, 2013
439 =====================================
441 - [Indic] Fixed rendering of Malayalam dot-reph
442 - Updated OT language tags.
443 - Updated graphite2 backend.
444 - Improved hb_ot_layout_get_size_params() logic.
445 - Improve hb-shape/hb-view help output.
446 - Fixed hb-set.h implementation to not crash.
447 - Fixed various issues with hb_ot_layout_collect_lookups().
448 - Various build fixes.
452 hb_graphite2_face_get_gr_face()
453 hb_graphite2_font_get_gr_font()
454 hb_coretext_face_get_cg_font()
458 hb_ot_layout_get_size_params()
461 Overview of changes leading to 0.9.9
462 Wednesday, December 5, 2012
463 ====================================
465 - Fix build on Windows.
466 - Minor improvements.
469 Overview of changes leading to 0.9.8
470 Tuesday, December 4, 2012
471 ====================================
474 - Actually implement hb_shape_plan_get_shaper ().
475 - Make UCDB data tables const.
476 - Lots of internal refactoring in OTLayout tables.
477 - Flesh out hb_ot_layout_lookup_collect_glyphs().
481 hb_ot_layout_collect_lookups()
482 hb_ot_layout_get_size_params()
485 Overview of changes leading to 0.9.7
486 Sunday, November 21, 2012
487 ====================================
490 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
492 - Fix Arabic contextual joining using pre-context text.
493 - Fix Sinhala "split matra" mess.
494 - Fix Khmer shaping with broken fonts.
495 - Implement Thai "PUA" shaping for old fonts.
496 - Do NOT route Kharoshthi script through the Indic shaper.
497 - Disable fallback positioning for Indic and Thai shapers.
501 hb-shape / hb-view changes:
503 - Add --text-before and --text-after
504 - Add --bot / --eot / --preserve-default-ignorables
505 - hb-shape --output-format=json
514 HB_BUFFER_FLAGS_DEFAULT
517 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
519 hb_buffer_set_flags()
520 hb_buffer_get_flags()
522 HB_BUFFER_SERIALIZE_FLAGS
523 hb_buffer_serialize_glyphs()
524 hb_buffer_deserialize_glyphs()
525 hb_buffer_serialize_list_formats()
529 hb_set_get_population()
532 hb_face_[sg]et_glyph_count()
534 hb_segment_properties_t
535 HB_SEGMENT_PROPERTIES_DEFAULT
536 hb_segment_properties_equal()
537 hb_segment_properties_hash()
539 hb_buffer_set_segment_properties()
540 hb_buffer_get_segment_properties()
542 hb_ot_layout_glyph_class_t
543 hb_ot_layout_get_glyph_class()
544 hb_ot_layout_get_glyphs_in_class()
547 hb_shape_plan_create()
548 hb_shape_plan_create_cached()
549 hb_shape_plan_get_empty()
550 hb_shape_plan_reference()
551 hb_shape_plan_destroy()
552 hb_shape_plan_set_user_data()
553 hb_shape_plan_get_user_data()
554 hb_shape_plan_execute()
555 hb_shape_plan_get_shaper()
557 hb_ot_shape_plan_collect_lookups()
562 - Remove "mask" parameter from hb_buffer_add().
563 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
564 - hb-set.h API const correction.
565 - Renamed hb_set_min/max() to hb_set_get_min/max().
566 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
567 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
571 Overview of changes leading to 0.9.6
572 Sunday, November 13, 2012
573 ====================================
575 - Don't clear pre-context text if no new context is provided.
576 - Fix ReverseChainingSubstLookup, which was totally borked.
577 - Adjust output format of hb-shape a bit.
578 - Include config.h.in in-tree. Makes it easier for alternate build systems.
579 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
580 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
581 - Drop glyphs for all of Unicode Default_Ignorable characters.
585 - Enable 'dlig' and 'mset' features in Arabic shaper.
586 - Implement 'Phags-pa shaping, improve Mongolian.
589 - Decompose Sinhala split matras the way old HarfBuzz / Pango did.
590 - Initial support for Consonant Medials.
591 - Start adding new-style Myanmar shaping.
592 - Make reph and 'pref' logic introspect the font.
593 - Route Meetei-Mayek through the Indic shaper.
594 - Don't apply 'liga' in Indic shaper.
595 - Improve Malayalam pre-base reordering Ra interaction with Chillus.
599 Overview of changes leading to 0.9.5
600 Sunday, October 14, 2012
601 ====================================
603 - Synthetic-GSUB Arabic fallback shaping.
605 - Misc Indic improvements.
607 - Add build system support for pthread.
609 - Imported UCDN for in-tree Unicode callbacks implementation.
611 - Context-aware Arabic joining.
617 hb_feature_to/from-string()
618 hb_buffer_[sg]et_content_type()
622 Overview of changes leading to 0.9.4
623 Tuesday, Sep 03, 2012
624 ====================================
626 - Indic improvements with old-spec Malayalam.
628 - Better fallback glyph positioning, specially with Thai / Lao marks.
630 - Implement dotted-circle insertion.
632 - Better Arabic fallback shaping / ligation.
634 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
640 Overview of changes leading to 0.9.3
642 ====================================
644 - Fixed fallback mark positioning for left-to-right text.
646 - Improve mark positioning for the remaining combining classes.
648 - Unbreak Thai and fallback Arabic shaping.
650 - Port Arabic shaper to shape-plan caching.
652 - Use new ICU normalizer functions.
656 Overview of changes leading to 0.9.2
658 ====================================
660 - Over a thousand commits! This is the first major release of HarfBuzz.
662 - HarfBuzz is feature-complete now! It should be in par, or better, than
663 both Pango's shapers and old HarfBuzz / Qt shapers.
665 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
667 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
668 Sinhala, N'ko, Mongolian, and Mandaic.
670 - New Thai / Lao shaper.
672 - Tibetan / Hangul support in the generic shaper.
674 - Synthetic GDEF support for fonts without a GDEF table.
676 - Fallback mark positioning for fonts without a GPOS table.
678 - Unicode normalization shaping heuristic during glyph mapping.
680 - New experimental Graphite2 backend.
682 - New Uniscribe backend (primarily for testing).
684 - New CoreText backend (primarily for testing).
686 - Major optimization and speedup.
688 - Test suites and testing infrastructure (work in progress).
690 - Greatly improved hb-view cmdline tool.
692 - hb-shape cmdline tool.
694 - Unicode 6.1 support.
696 Summary of API changes:
700 - Users are expected to only include main header files now (ie. hb.h,
701 hb-glib.h, hb-ft.h, ...)
703 - All struct tag names had their initial underscore removed.
704 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
706 - All set_user_data() functions now take a "replace" boolean parameter.
708 - hb_buffer_create() takes zero arguments now.
709 Use hb_buffer_pre_allocate() to pre-allocate.
711 - hb_buffer_add_utf*() now accept -1 for length parameteres,
712 meaning "nul-terminated".
714 - hb_direction_t enum values changed.
716 - All *_from_string() APIs now take a length parameter to allow for
717 non-nul-terminated strings. A -1 length means "nul-terminated".
719 - Typedef for hb_language_t changed.
721 - hb_get_table_func_t renamed to hb_reference_table_func_t.
723 - hb_ot_layout_table_choose_script()
725 - Various renames in hb-unicode.h.
729 - hb_buffer_guess_properties()
730 Automatically called by hb_shape().
732 - hb_buffer_normalize_glyphs()
734 - hb_tag_from_string()
740 - hb_face_reference_blob()
741 - hb_face_[sg]et_index()
744 - hb_font_get_glyph_name_func_t
745 hb_font_get_glyph_from_name_func_t
746 hb_font_funcs_set_glyph_name_func()
747 hb_font_funcs_set_glyph_from_name_func()
748 hb_font_get_glyph_name()
749 hb_font_get_glyph_from_name()
750 hb_font_glyph_to_string()
751 hb_font_glyph_from_string()
753 - hb_font_set_funcs_data()
755 - hb_ft_font_set_funcs()
756 - hb_ft_font_get_face()
758 - hb-gobject.h (work in progress)
760 - hb_ot_shape_glyphs_closure()
761 hb_ot_layout_substitute_closure_lookup()
767 - hb_unicode_combining_class_t
769 - hb_unicode_compose_func_t
770 hb_unicode_decompose_func_t
771 hb_unicode_decompose_compatibility_func_t
772 hb_unicode_funcs_set_compose_func()
773 hb_unicode_funcs_set_decompose_func()
774 hb_unicode_funcs_set_decompose_compatibility_func()
776 hb_unicode_decompose()
777 hb_unicode_decompose_compatibility()
781 - hb_ft_get_font_funcs()
783 - hb_ot_layout_substitute_start()
784 hb_ot_layout_substitute_lookup()
785 hb_ot_layout_substitute_finish()
786 hb_ot_layout_position_start()
787 hb_ot_layout_position_lookup()
788 hb_ot_layout_position_finish()
792 Overview of changes leading to 0.6.0
794 ====================================
796 - Vertical text support in GPOS
797 - Almost all API entries have unit tests now, under test/
798 - All thread-safety issues are fixed
800 Summary of API changes follows.
807 hb_language_get_default()
808 hb_direction_to_string()
809 hb_direction_from_string()
810 hb_script_get_horizontal_direction()
814 hb_category_t renamed to hb_unicode_general_category_t
817 hb_language_t is a typed pointers now
823 * Use ISO 15924 tags for hb_script_t:
826 hb_script_from_iso15924_tag()
827 hb_script_to_iso15924_tag()
828 hb_script_from_string()
831 HB_SCRIPT_* enum members changed value.
834 * Buffer API streamlined:
838 hb_buffer_set_length()
839 hb_buffer_allocation_successful()
842 hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
843 hb_buffer_add_glyph() renamed to hb_buffer_add()
847 hb_buffer_clear_positions()
850 hb_buffer_get_glyph_infos() takes an out length parameter now
851 hb_buffer_get_glyph_positions() takes an out length parameter now
854 * Blob API streamlined:
858 hb_blob_get_data_writable()
861 hb_blob_create_empty() renamed to hb_blob_get_empty()
866 hb_blob_is_writable()
867 hb_blob_try_writable()
870 hb_blob_create() takes user_data before destroy now
873 * Unicode functions API:
875 o Unicode function vectors can subclass other unicode function vectors now.
876 Unimplemented callbacks in the subclass automatically chainup to the parent.
878 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
879 take a user_data and its respective destroy callback.
882 hb_unicode_funcs_get_empty()
883 hb_unicode_funcs_get_default()
884 hb_unicode_funcs_get_parent()
887 hb_unicode_funcs_create() now takes a parent_funcs.
889 o Removed func getter functions:
890 hb_unicode_funcs_get_mirroring_func()
891 hb_unicode_funcs_get_general_category_func()
892 hb_unicode_funcs_get_script_func()
893 hb_unicode_funcs_get_combining_class_func()
894 hb_unicode_funcs_get_eastasian_width_func()
900 hb_face_get_table() renamed to hb_face_reference_table()
901 hb_face_create_for_data() renamed to hb_face_create()
904 hb_face_create_for_tables() takes user_data before destroy now
905 hb_face_reference_table() returns empty blob instead of NULL
906 hb_get_table_func_t accepts the face as first parameter now
910 o Fonts can subclass other fonts now. Unimplemented callbacks in the
911 subclass automatically chainup to the parent. When chaining up,
912 scale is adjusted if the parent font has a different scale.
914 o All hb_font_funcs_t callbacks take a user_data now. Their setters
915 take a user_data and its respective destroy callback.
919 hb_font_funcs_get_empty()
920 hb_font_create_sub_font()
924 hb_font_unset_funcs()
926 o Removed func getter functions:
927 hb_font_funcs_get_glyph_func()
928 hb_font_funcs_get_glyph_advance_func()
929 hb_font_funcs_get_glyph_extents_func()
930 hb_font_funcs_get_contour_point_func()
931 hb_font_funcs_get_kerning_func()
934 hb_font_create() takes a face and references it now
935 hb_font_set_funcs() takes user_data before destroy now
936 hb_font_set_scale() accepts signed integers now
937 hb_font_get_contour_point_func_t now takes glyph first, then point_index
938 hb_font_get_glyph_func_t returns a success boolean now
941 * Changed object model:
943 o All object types have a _get_empty() now:
945 hb_buffer_get_empty()
948 hb_font_funcs_get_empty()
949 hb_unicode_funcs_get_empty()
951 o Added _set_user_data() and _get_user_data() for all object types:
952 hb_blob_get_user_data()
953 hb_blob_set_user_data()
954 hb_buffer_get_user_data()
955 hb_buffer_set_user_data()
956 hb_face_get_user_data()
957 hb_face_set_user_data()
958 hb_font_funcs_get_user_data()
959 hb_font_funcs_set_user_data()
960 hb_font_get_user_data()
961 hb_font_set_user_data()
962 hb_unicode_funcs_get_user_data()
963 hb_unicode_funcs_set_user_data()
965 o Removed the _get_reference_count() from all object types:
966 hb_blob_get_reference_count()
967 hb_buffer_get_reference_count()
968 hb_face_get_reference_count()
969 hb_font_funcs_get_reference_count()
970 hb_font_get_reference_count()
971 hb_unicode_funcs_get_reference_count()
973 o Added _make_immutable() and _is_immutable() for all object types except for buffer:
974 hb_blob_make_immutable()
975 hb_blob_is_immutable()
976 hb_face_make_immutable()
977 hb_face_is_immutable()
980 * Changed API for vertical text support
982 o The following callbacks where removed:
983 hb_font_get_glyph_advance_func_t
984 hb_font_get_kerning_func_t
986 o The following new callbacks added instead:
987 hb_font_get_glyph_h_advance_func_t
988 hb_font_get_glyph_v_advance_func_t
989 hb_font_get_glyph_h_origin_func_t
990 hb_font_get_glyph_v_origin_func_t
991 hb_font_get_glyph_h_kerning_func_t
992 hb_font_get_glyph_v_kerning_func_t
994 o The following API removed as such:
995 hb_font_funcs_set_glyph_advance_func()
996 hb_font_funcs_set_kerning_func()
997 hb_font_get_glyph_advance()
998 hb_font_get_kerning()
1000 o New API added instead:
1001 hb_font_funcs_set_glyph_h_advance_func()
1002 hb_font_funcs_set_glyph_v_advance_func()
1003 hb_font_funcs_set_glyph_h_origin_func()
1004 hb_font_funcs_set_glyph_v_origin_func()
1005 hb_font_funcs_set_glyph_h_kerning_func()
1006 hb_font_funcs_set_glyph_v_kerning_func()
1007 hb_font_get_glyph_h_advance()
1008 hb_font_get_glyph_v_advance()
1009 hb_font_get_glyph_h_origin()
1010 hb_font_get_glyph_v_origin()
1011 hb_font_get_glyph_h_kerning()
1012 hb_font_get_glyph_v_kerning()
1014 o The following higher-leve API added for convenience:
1015 hb_font_get_glyph_advance_for_direction()
1016 hb_font_get_glyph_origin_for_direction()
1017 hb_font_add_glyph_origin_for_direction()
1018 hb_font_subtract_glyph_origin_for_direction()
1019 hb_font_get_glyph_kerning_for_direction()
1020 hb_font_get_glyph_extents_for_origin()
1021 hb_font_get_glyph_contour_point_for_origin()
1024 * OpenType Layout API:
1027 hb_ot_layout_position_start()
1028 hb_ot_layout_substitute_start()
1029 hb_ot_layout_substitute_finish()
1035 hb_glib_script_to_script()
1036 hb_glib_script_from_script()
1037 hb_icu_script_to_script()
1038 hb_icu_script_from_script()
1041 * Version API added: