1 Overview of changes leading to 1.7.6
2 Wednesday, March 7, 2018
3 ====================================
5 - Fix to hb_set_t binary operations. Ouch.
6 - New experimental harfbuzz-subset library. All of hb-subset.h
7 is experimental right now and API WILL change.
10 hb_blob_copy_writable_or_fail()
13 hb_set_previous_range()
16 Overview of changes leading to 1.7.5
17 Tuesday, January 30, 2018
18 ====================================
20 - Separate Khmer shaper from Indic.
21 - First stab at AAT morx. Not hooked up.
25 Overview of changes leading to 1.7.4
26 Wednesday, December 20, 2017
27 ====================================
29 - Fix collect_glyphs() regression caused by hb_set_t changes.
32 Overview of changes leading to 1.7.3
33 Monday, December 18, 2017
34 ====================================
36 - hb_set_t performance tuning and optimizations.
37 - Speed up collect_glyphs() and reject garbage data.
38 - In hb_coretext_font_create() set font point-size (ptem).
42 Overview of changes leading to 1.7.2
43 Monday, December 4, 2017
44 ====================================
46 - Optimize hb_set_add_range().
49 hb_coretext_font_create()
52 Overview of changes leading to 1.7.1
53 Tuesday, November 14, 2017
54 ====================================
56 - Fix atexit object destruction regression.
57 - Fix minor integer-overflow.
60 Overview of changes leading to 1.7.0
61 Monday, November 13, 2017
62 ====================================
65 - Implement kerning and glyph names in hb-ot-font.
66 - Various DSO optimization re .data and .bss sizes.
67 - Make C++11 optional; build fixes.
68 - Mark all other backends "unsafe-to-break".
72 Overview of changes leading to 1.6.3
73 Thursday, October 26th, 2017
74 ====================================
76 - Fix hb_set_t some more. Should be solid now.
77 - Implement get_glyph_name() for hb-ot-font.
81 Overview of changes leading to 1.6.2
82 Monday, October 23nd, 2017
83 ====================================
85 - Yesterday's release had a bad crasher; don't use it. That's what
86 happens when one works on Sunday...
87 https://github.com/harfbuzz/harfbuzz/issues/578
88 - Build fixes for FreeBSD and Chrome Android.
91 Overview of changes leading to 1.6.1
92 Sunday, October 22nd, 2017
93 ====================================
95 - Don't skip over COMBINING GRAPHEME JOINER when ligating, etc.
96 To be refined: https://github.com/harfbuzz/harfbuzz/issues/554
97 - Faster hb_set_t implementation.
98 - Don't use deprecated ICU API.
99 - Fix undefined-behavior in Myanmar shaper, introduced in 1.6.0
104 Overview of changes leading to 1.6.0
105 Friday, October the 13th, 2017
106 ====================================
108 - Update to Unicode 10.
110 - Various Indic and Universal Shaping Engine fixes as a result of
111 HarfBuzz Hackfest with Jonathan Kew at Web Engines Hackfest at
112 the Igalia offices in A Coruña, Spain. Thanks Igalia for having
115 - Implement Unicode Arabic Mark Ordering Algorithm UTR#53.
117 - Implement optical sizing / tracking in CoreText backend, using
118 new API hb_font_set_ptem().
120 - Allow notifying hb_font_t that underlying FT_Face changed sizing,
121 using new API hb_ft_font_changed().
123 - More Graphite backend RTL fixes.
125 - Fix caching of variable font shaping plans.
127 - hb-view / hb-shape now accept following new arguments:
129 o --unicodes: takes a list of hex numbers that represent Unicode
133 +hb_face_get_table_tags()
136 +hb_ft_font_changed()
139 Overview of changes leading to 1.5.1
140 Tuesday, September 5, 2017
141 ====================================
143 - Fix "unsafe-to-break" in fallback shaping and other corner cases.
144 All our tests pass with --verify now, meaning unsafe-to-break API
146 - Add --unicodes to hb-view / hb-shape.
147 - [indic] Treat Consonant_With_Stacker as consonant. This will need
149 - hb_buffer_diff() tweaks.
152 Overview of changes leading to 1.5.0
153 Wednesday, August 23, 2017
154 ====================================
156 - Misc new API, for appending a buffer to another, and for comparing
157 contents of two buffers for types of differences.
159 - New "unsafe-to-break" API. Can be used to speed up reshaping
160 in line-breaking situations. Essentially, after shaping, it returns
161 positions in the input string (some of the cluster boundaries) that
162 are "safe to break" in that if the text is segmented at that position
163 and two sides reshaped and concatenated, the shaping result is
164 exactly the same as shaping the text in one piece.
166 hb-view and hb-shape and hb-shape now take --verify, which verifies
169 Some corner cases of the implementation are still not quite working.
170 Those will be fixed in subsequent releases.
177 HB_GLYPH_FLAG_UNSAFE_TO_BREAK
178 HB_GLYPH_FLAG_DEFINED
179 hb_glyph_info_get_glyph_flags()
181 HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS
183 hb_buffer_diff_flags_t
184 HB_BUFFER_DIFF_FLAG_EQUAL
185 HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH
186 HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH
187 HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT
188 HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT
189 HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH
190 HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH
191 HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH
192 HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH
196 Overview of changes leading to 1.4.8
197 Tuesday, August 8, 2017
198 ====================================
200 - Major fix to avar table handling.
201 - Rename hb-shape --show-message to --trace.
205 Overview of changes leading to 1.4.7
206 Tuesday, July 18, 2017
207 ====================================
209 - Multiple Indic, Tibetan, and Cham fixes.
210 - CoreText: Allow disabling kerning.
211 - Adjust Arabic feature order again.
215 Overview of changes leading to 1.4.6
216 Sunday, April 23, 2017
217 ====================================
219 - Graphite2: Fix RTL positioning issue.
220 - Backlist GDEF of more versions of Padauk and Tahoma.
221 - New, experimental, cmake alternative build system.
224 Overview of changes leading to 1.4.5
225 Friday, March 10, 2017
226 ====================================
228 - Revert "Fix Context lookup application when moving back after a glyph..."
229 This introduced memory access problems. To be fixed properly soon.
232 Overview of changes leading to 1.4.4
233 Sunday, March 5, 2017
234 ====================================
236 - Fix Context lookup application when moving back after a glyph deletion.
237 - Fix buffer-overrun in Bengali.
240 Overview of changes leading to 1.4.3
241 Saturday, February 25, 2017
242 ====================================
244 - Route Adlam script to Arabic shaper.
249 hb_graphite2_font_get_gr_font()
252 Overview of changes leading to 1.4.2
253 Monday, January 23, 2017
254 ====================================
256 - Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR.
257 - hb-shape and hb-view now accept --variations.
261 hb_variation_from_string()
262 hb_variation_to_string()
264 hb_font_set_variations()
265 hb_font_set_var_coords_design()
266 hb_font_get_var_coords_normalized()
271 hb_ot_var_get_axis_count()
273 hb_ot_var_find_axis()
274 hb_ot_var_normalize_variations()
275 hb_ot_var_normalize_coords()
277 - MVAR to be implemented later. Access to named instances to be
278 implemented later as well.
283 Overview of changes leading to 1.4.1
284 Thursday, January 5, 2017
285 ====================================
287 - Always build and use UCDN for Unicode data by default.
288 Reduces dependence on version of Unicode data in glib,
289 specially in the Windows bundles we are shipping, which
293 Overview of changes leading to 1.4.0
294 Thursday, January 5, 2017
295 ====================================
297 - Merged "OpenType GX" branch which adds core of support for
298 OpenType 1.8 Font Variations. To that extent, the relevant
302 hb_font_set_var_coords_normalized()
307 HB_OT_LAYOUT_NO_VARIATIONS_INDEX
308 hb_ot_layout_table_find_feature_variations()
309 hb_ot_layout_feature_with_variations_get_lookups()
310 hb_shape_plan_create2()
311 hb_shape_plan_create_cached2()
313 Currently variations in GSUB/GPOS/GDEF are fully supported,
314 and no other tables are supported. In particular, fvar/avar
315 are NOT supported, hence the hb_font_set_var_coords_normalized()
316 taking normalized coordinates. API to take design coordinates
317 will be added in the future.
319 HVAR/VVAR/MVAR support will also be added to hb-ot-font in the
322 - Fix regression in GDEF glyph class processing.
323 - Add decompositions for Chakma, Limbu, and Balinese in USE shaper.
327 Overview of changes leading to 1.3.4
328 Monday, December 5, 2016
329 ====================================
331 - Fix vertical glyph origin in hb-ot-font.
332 - Implement CBDT/CBLC color font glyph extents in hb-ot-font.
335 Overview of changes leading to 1.3.3
336 Wednesday, September 28, 2016
337 ====================================
339 - Implement parsing of OpenType MATH table.
343 hb_ot_math_constant_t
345 hb_ot_math_glyph_variant_t
346 hb_ot_math_glyph_part_flags_t
347 hb_ot_math_glyph_part_t
349 hb_ot_math_get_constant
350 hb_ot_math_get_glyph_italics_correction
351 hb_ot_math_get_glyph_top_accent_attachment
352 hb_ot_math_get_glyph_kerning
353 hb_ot_math_is_glyph_extended_shape
354 hb_ot_math_get_glyph_variants
355 hb_ot_math_get_min_connector_overlap
356 hb_ot_math_get_glyph_assembly
359 Overview of changes leading to 1.3.2
360 Wednesday, September 27, 2016
361 ====================================
363 - Fix build of hb-coretext on older OS X versions.
366 Overview of changes leading to 1.3.1
367 Wednesday, September 7, 2016
368 ====================================
370 - Blacklist bad GDEF of more fonts (Padauk).
371 - More CoreText backend crash fixes with OS X 10.9.5.
375 Overview of changes leading to 1.3.0
376 Thursday, July 21, 2016
377 ====================================
379 - Update to Unicode 9.0.0
380 - Move Javanese from Indic shaper to Universal Shaping Engine.
381 - Allow MultipleSubst to delete a glyph (matching Windows engine).
382 - Update Universal Shaping Engine to latest draft from Microsoft.
383 - DirectWrite backend improvements. Note: this backend is for testing ONLY.
384 - CoreText backend improvements with unreachable fonts.
385 - Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font.
386 - Blacklist bad GDEF of more fonts (Tahoma & others).
390 Overview of changes leading to 1.2.7
392 ====================================
394 - Blacklist another version of Times New Roman (Bold) Italic from Windows 7.
395 - Fix Mongolian Free Variation Selectors shaping with certain fonts.
396 - Fix Tibetan shorthand contractions shaping.
397 - Improved list of language tag mappings.
398 - Unbreak build on Windows CE.
399 - Make 'glyf' table loading lazy in hb-ot-font.
402 Overview of changes leading to 1.2.6
403 Friday, April 8, 2016
404 ====================================
406 - Blacklist GDEF table of another set of Times New Roman (Bold) Italic.
407 - DirectWrite backend improvements. Note: DirectWrite backend is
408 exclusively for our internal testing and should NOT be used in any
409 production system whatsoever.
412 Overview of changes leading to 1.2.5
413 Monday, April 4, 2016
414 ====================================
416 - Fix GDEF mark-filtering-set, which was broken in 1.2.3.
419 Overview of changes leading to 1.2.4
420 Thursday, March 17, 2016
421 ====================================
423 - Synthesize GDEF glyph class for any glyph that does not have one in GDEF.
424 I really hope we don't discover broken fonts that shape badly with this
426 - Misc build and other minor fixes.
428 - Added HB_NDEBUG. It's fine for production systems to define this to
429 disable high-overhead debugging checks. However, I also reduced the
430 overhead of those checks, so it's a non-issue right now. You can
431 forget it. Just not defining anything at all is fine.
434 Overview of changes leading to 1.2.3
435 Thursday, February 25, 2016
436 ====================================
438 - Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic,
439 due to bug in glyph class of ASCII double-quote character. This should
440 address "regression" introduced in 1.2.0 when we switched mark zeroing
441 in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE.
442 This fourth release in a week should finally stablize things...
444 - hb-ot-font's get_glyph() implementation saw some optimizations. Though,
445 might be really hard to measure in real-world situations.
447 - Also, two rather small API changes:
449 We now disable some time-consuming internal bookkeeping if built with NDEBUG
450 defined. This is a first time that we use NDEBUG to disable debug code. If
451 there exist production systems that do NOT want to enable NDEBUG, please let
452 me know and I'll add HB_NDEBUG.
454 Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph()
457 - hb_font_get_nominal_glyph_func_t
458 - hb_font_get_variation_glyph_func_t
459 - hb_font_funcs_set_nominal_glyph_func()
460 - hb_font_funcs_set_variation_glyph_func()
461 - hb_font_get_nominal_glyph()
462 - hb_font_get_variation_glyph()
465 - hb_font_get_glyph_func_t
466 - hb_font_funcs_set_glyph_func()
468 Clients that implement their own font-funcs are encouraged to replace
469 their get_glyph() implementation with a get_nominal_glyph() and
470 get_variation_glyph() pair. The variation version can assume that
471 variation_selector argument is not zero. Old (deprecated) functions
472 will continue working indefinitely using internal gymnastics; it is
473 just more efficient to use the new functions.
476 Overview of changes leading to 1.2.2
477 Wednesday, February 24, 2016
478 ====================================
480 - Fix regression with mark positioning with fonts that have
481 non-zero mark advances. This was introduced in 1.2.0 while
482 trying to make mark and cursive attachments to work together.
483 I have partially reverted that, so this version is much more
484 like what we had before. All clients who updated to 1.2.0
485 should update to this version.
488 Overview of changes leading to 1.2.1
489 Tuesday, February 23, 2016
490 ====================================
492 - CoreText: Fix bug with wrong scale if font scale was changed later.
493 https://github.com/libass/libass/issues/212
494 - CoreText: Drastically speed up font initialization.
495 - CoreText: Fix tiny leak.
496 - Group ZWJ/ZWNJ with previous syllable under cluster-level=0.
497 https://github.com/harfbuzz/harfbuzz/issues/217
498 - Add test/shaping/README.md about how to add tests to the suite.
501 Overview of changes leading to 1.2.0
502 Friday, February 19, 2016
503 ====================================
505 - Fix various issues (hangs mostly) in case of memory allocation failure.
506 - Change mark zeroing types of most shapers from BY_UNICODE_LATE to
507 BY_GDEF_LATE. This seems to be what Uniscribe does.
508 - Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY. That's
510 - Allow GPOS cursive connection on marks, and fix the interaction with
511 mark attachment. This work resulted in some changes to how mark
512 attachments work. See:
513 https://github.com/harfbuzz/harfbuzz/issues/211
514 https://github.com/harfbuzz/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2
515 - Graphite2 shaper: improved negative advance handling (eg. Nastaliq).
516 - Add nmake-based build system for Windows.
518 - Misc. improvements.
521 Overview of changes leading to 1.1.3
522 Monday, January 11, 2016
523 ====================================
525 - Ported Indic shaper to Unicode 8.0 data.
526 - Universal Shaping Engine fixes.
527 - Speed up CoreText shaper when font fallback happens in CoreText.
528 - Documentation improvements, thanks to Khaled Hosny.
529 - Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi.
535 hb_font_get_font_extents_func_t
536 hb_font_get_font_h_extents_func_t
537 hb_font_get_font_v_extents_func_t
538 hb_font_funcs_set_font_h_extents_func
539 hb_font_funcs_set_font_v_extents_func
540 hb_font_get_h_extents
541 hb_font_get_v_extents
542 hb_font_get_extents_for_direction
544 * Buffer message (aka debug):
545 hb_buffer_message_func_t
546 hb_buffer_set_message_func()
547 Actual message protocol to be fleshed out later.
550 Overview of changes leading to 1.1.2
551 Wednesday, November 26, 2015
552 ====================================
554 - Fix badly-broken fallback shaper that affected terminology.
555 https://github.com/harfbuzz/harfbuzz/issues/187
556 - Fix y_scaling in Graphite shaper.
558 * An unset glyph_h_origin() function in font-funcs now (sensibly)
559 implies horizontal origin at 0,0. Ie, the nil callback returns
560 true instead of false. As such, implementations that have a
561 glyph_h_origin() that simply returns true, can remove that function
562 with HarfBuzz >= 1.1.2. This results in a tiny speedup.
565 Overview of changes leading to 1.1.1
566 Wednesday, November 24, 2015
567 ====================================
569 - Build fixes, specially for hb-coretext.
572 Overview of changes leading to 1.1.0
573 Wednesday, November 18, 2015
574 ====================================
576 - Implement 'stch' stretch feature for Syriac Abbreviation Mark.
577 https://github.com/harfbuzz/harfbuzz/issues/141
578 - Disable use of decompose_compatibility() callback.
579 - Implement "shaping" of various Unicode space characters, even
580 if the font does not support them.
581 https://github.com/harfbuzz/harfbuzz/issues/153
582 - If font does not support U+2011 NO-BREAK HYPHEN, fallback to
584 - Changes resulting from libFuzzer continuous fuzzing:
585 * Reject font tables that need more than 8 edits,
586 * Bound buffer growth during shaping to 32x,
587 * Fix assertions and other issues at OOM / buffer max-growth.
588 - Misc fixes and optimizations.
590 * All fonts created with hb_font_create() now inherit from
591 (ie. have parent) hb_font_get_empty().
594 Overview of changes leading to 1.0.6
595 Thursday, October 15, 2015
596 ====================================
598 - Reduce max nesting level in OT lookups from 8 to 6.
599 Should not affect any real font as far as I know.
600 - Fix memory access issue in ot-font.
601 - Revert default load-flags of fonts created using hb_ft_font_create()
602 back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING. This was changed in
603 last release (1.0.5), but caused major issues, so revert.
604 https://github.com/harfbuzz/harfbuzz/issues/143
607 Overview of changes leading to 1.0.5
608 Tuesday, October 13, 2015
609 ====================================
611 - Fix multiple memory access bugs discovered using libFuzzer.
612 https://github.com/harfbuzz/harfbuzz/issues/139
613 Everyone should upgrade to this version as soon as possible.
614 We now have continuous fuzzing set up, to avoid issues like
615 these creeping in again.
619 * hb_font_set_parent().
620 * hb_ft_font_[sg]et_load_flags()
621 The default flags for fonts created using hb_ft_font_create()
622 has changed to default to FT_LOAD_DEFAULT now. Previously it
623 was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING.
626 * Fonts now default to units-per-EM as their scale, instead of 0.
627 * hb_font_create_sub_font() does NOT make parent font immutable
628 anymore. hb_font_make_immutable() does.
631 Overview of changes leading to 1.0.4
632 Wednesday, September 30, 2015
633 ====================================
635 - Fix minor out-of-bounds read error.
638 Overview of changes leading to 1.0.3
639 Tuesday, September 1, 2015
640 ====================================
642 - Start of user documentation, from Simon Cozens!
643 - Implement glyph_extents() for TrueType fonts in hb-ot-font.
644 - Improve GPOS cursive attachments with conflicting lookups.
645 - More fixes for cluster-level = 1.
646 - Uniscribe positioning fix.
649 Overview of changes leading to 1.0.2
650 Wednesday, August 19, 2015
651 ====================================
653 - Fix shaping with cluster-level > 0.
654 - Fix Uniscribe backend font-size scaling.
655 - Declare dependencies in harfbuzz.pc.
656 FreeType is not declared though, to avoid bugs in pkg-config
657 0.26 with recursive dependencies.
658 - Slightly improved debug infrastructure. More to come later.
662 Overview of changes leading to 1.0.1
663 Monday, July 27, 2015
664 ====================================
666 - Fix out-of-bounds access in USE shaper.
669 Overview of changes leading to 1.0.0
670 Sunday, July 26, 2015
671 ====================================
673 - Implement Universal Shaping Engine:
674 https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm
675 http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/
676 - Bump version to 1.0.0. The soname was NOT bumped.
679 Overview of changes leading to 0.9.42
680 Thursday, July 26, 2015
681 =====================================
683 - New API to allow for retrieving finer-grained cluster
684 mappings if the client desires to handle them. Default
685 behavior is unchanged.
686 - Fix cluster merging when removing default-ignorables.
687 - Update to Unicode 8.0
688 - hb-graphite2 fixes.
690 - Removed HB_NO_MERGE_CLUSTERS hack.
692 hb_buffer_cluster_level_t enum
693 hb_buffer_get_cluster_level()
694 hb_buffer_set_cluster_level()
695 hb-shape / hb-view --cluster-level
698 Overview of changes leading to 0.9.41
699 Thursday, June 18, 2015
700 =====================================
702 - Fix hb-coretext with trailing whitespace in right-to-left.
703 - New API: hb_buffer_reverse_range().
704 - Allow implementing atomic ops in config.h.
705 - Fix hb_language_t in language bindings.
709 Overview of changes leading to 0.9.40
710 Friday, March 20, 2015
711 =====================================
713 - Another hb-coretext crasher fix. Ouch!
717 Overview of changes leading to 0.9.39
718 Wednesday, March 4, 2015
719 =====================================
721 - Critical hb-coretext fixes.
722 - Optimizations and refactoring; no functional change
727 Overview of changes leading to 0.9.38
728 Friday, January 23, 2015
729 =====================================
731 - Fix minor out-of-bounds access in Indic shaper.
732 - Change New Tai Lue shaping engine from South-East Asian to default,
733 reflecting change in Unicode encoding model.
734 - Add hb-shape --font-size. Can take up to two numbers for separate
736 - Fix CoreText and FreeType scale issues with negative scales.
737 - Reject blobs larger than 2GB. This might break some icu-le-hb clients
738 that need security fixes. See:
739 http://www.icu-project.org/trac/ticket/11450
740 - Avoid accessing font tables during face destruction, in casce rogue
741 clients released face data already.
742 - Fix up gobject-introspection a bit. Python bindings kinda working.
746 hb_ft_face_create_referenced()
747 hb_ft_font_create_referenced()
750 Overview of changes leading to 0.9.37
751 Wednesday, December 17, 2014
752 =====================================
754 - Fix out-of-bounds access in Context lookup format 3.
755 - Indic: Allow ZWJ/ZWNJ before syllable modifiers.
758 Overview of changes leading to 0.9.36
759 Thursday, November 20, 2014
760 =====================================
762 - First time that three months went by without a release since
763 0.9.2 was released on August 10, 2012!
764 - Fix performance bug in hb_ot_collect_glyphs():
765 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869
766 - Add basic vertical-text support to hb-ot-font.
770 Overview of changes leading to 0.9.35
771 Saturday, August 13, 2014
772 =====================================
774 - Fix major shape-plan caching bug when more than one shaper were
775 provided to hb_shape_full() (as exercised by XeTeX).
776 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html
777 - Fix Arabic fallback shaping regression. This was broken in 0.9.32.
778 - Major hb-coretext fixes. That backend is complete now, including
779 respecing buffer direction and language, down to vertical writing.
780 - Build fixes for Windows CE. Should build fine now.
782 Use atexit() only if it's safe to call from shared library
783 https://bugs.freedesktop.org/show_bug.cgi?id=82246
784 Mandaic had errors in its Unicode Joining_Type
785 https://bugs.freedesktop.org/show_bug.cgi?id=82306
788 * hb_buffer_clear_contents() does not reset buffer flags now.
790 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't
791 need to set flags for different pieces of text. The flags now
792 are something the client sets up once, depending on how it
793 actually uses the buffer. As such, don't clear it in
796 I don't expect any changes to be needed to any existing client.
799 Overview of changes leading to 0.9.34
800 Saturday, August 2, 2014
801 =====================================
803 - hb_feature_from_string() now accepts CSS font-feature-settings format.
804 - As a result, hb-shape / hb-view --features also accept CSS-style strings.
805 Eg, "'liga' off" is accepted now.
806 - Add old-spec Myanmar shaper:
807 https://bugs.freedesktop.org/show_bug.cgi?id=81775
808 - Don't apply 'calt' in Hangul shaper.
809 - Fix mark advance zeroing for Hebrew shaper:
810 https://bugs.freedesktop.org/show_bug.cgi?id=76767
811 - Implement Windows-1256 custom Arabic shaping. Only built on Windows,
812 and requires help from get_glyph(). Used by Firefox.
813 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139
814 - Disable 'liga' in vertical text.
818 * Make HB_BUFFER_FLAG_BOT/EOT easier to use.
820 Previously, we expected users to provide BOT/EOT flags when the
821 text *segment* was at paragraph boundaries. This meant that for
822 clients that provide full paragraph to HarfBuzz (eg. Pango), they
825 hb_buffer_set_flags (hb_buffer,
826 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |
827 (item_offset + item_length == paragraph_length ?
828 HB_BUFFER_FLAG_EOT : 0));
830 hb_buffer_add_utf8 (hb_buffer,
831 paragraph_text, paragraph_length,
832 item_offset, item_length);
834 After this change such clients can simply say:
836 hb_buffer_set_flags (hb_buffer,
837 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);
839 hb_buffer_add_utf8 (hb_buffer,
840 paragraph_text, paragraph_length,
841 item_offset, item_length);
843 Ie, HarfBuzz itself checks whether the segment is at the beginning/end
844 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz
845 continue not setting any flags whatsoever.
847 Another way to put it is: if there's pre-context text in the buffer,
848 HarfBuzz ignores the BOT flag. If there's post-context, it ignores
852 Overview of changes leading to 0.9.33
853 Tuesday, July 22, 2014
854 =====================================
856 - Turn off ARabic 'cswh' feature that was accidentally turned on.
857 - Add HB_TAG_MAX_SIGNED.
858 - Make hb_face_make_immutable() really make face immutable!
859 - Windows build fixes.
862 Overview of changes leading to 0.9.32
863 Thursday, July 17, 2014
864 =====================================
866 - Apply Arabic shaping features in spec order exactly.
867 - Another fix for Mongolian free variation selectors.
868 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'
870 - Minor adjustment to U+FFFD logic.
871 - Fix hb-coretext build.
874 Overview of changes leading to 0.9.31
875 Wednesday, July 16, 2014
876 =====================================
878 - Only accept valid UTF-8/16/32; we missed many cases before.
879 - Better shaping of invalid UTF-8/16/32. Falls back to
880 U+FFFD REPLACEMENT CHARACTER now.
881 - With all changes in this release, the buffer will contain fully
882 valid Unicode after hb_buffer_add_utf8/16/32 no matter how
883 broken the input is. This can be overridden though. See below.
884 - Fix Mongolian Variation Selectors for fonts without GDEF.
885 - Fix minor invalid buffer access.
886 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language()
887 now uses these instead of private tags.
890 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32()
891 used to do, ie. no validity check on the input at all. add_utf32
892 now replaces invalid Unicode codepoints with the replacement
893 character (see below).
894 * hb_buffer_set_replacement_codepoint()
895 * hb_buffer_get_replacement_codepoint()
896 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when
897 we detected broken input, we replaced that with (hb_codepoint_t)-1.
898 This has changed to use U+FFFD now, but can be changed using these
902 Overview of changes leading to 0.9.30
903 Wednesday, July 9, 2014
904 =====================================
906 - Update to Unicode 7.0.0:
907 * New scripts Manichaean and Psalter Pahlavi are shaped using
909 * All the other new scripts to through the generic shaper for
911 - Minor Indic improvements.
912 - Fix graphite2 backend cluster mapping [crasher!]
914 * New HB_SCRIPT_* values for Unicode 7.0 scripts.
915 * New function hb_ot_layout_language_get_required_feature().
919 Overview of changes leading to 0.9.29
920 Thursday, May 29, 2014
921 =====================================
923 - Implement cmap in hb-ot-font.h. No variation-selectors yet.
924 - Myanmar: Allow MedialYa+Asat.
925 - Various Indic fixes:
926 * Support most characters in Extended Devanagary and Vedic
928 * Allow digits and a some punctuation as consonant placeholders.
932 Overview of changes leading to 0.9.28
933 Monday, April 28, 2014
934 =====================================
936 - Unbreak old-spec Indic shaping. (bug 76705)
937 - Fix shaping of U+17DD and U+0FC6.
938 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default
939 for shipping libraries. It's an option for further experimentation
940 right now. When we are sure how to do it properly, we will add
941 public run-time API for the functionality.
945 Overview of changes leading to 0.9.27
946 Tuesday, March 18, 2014
947 =====================================
949 - Don't use "register" storage class specifier
950 - Wrap definition of free_langs() with HAVE_ATEXIT
951 - Add coretext_aat shaper and hb_coretext_face_create() constructor
952 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks
953 - Add Myanmar test case from OpenType Myanmar spec
954 - Only do fallback Hebrew composition if no GPOS 'mark' available
955 - Allow bootstrapping without gtk-doc
956 - Use AM_MISSING_PROG for ragel and git
957 - Typo in ucdn's Makefile.am
958 - Improve MemoryBarrier() implementation
961 Overview of changes leading to 0.9.26
962 Thursday, January 30, 2014
963 =====================================
966 - Fix application of 'rtlm' feature.
967 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.
968 - New header: hb-ot-shape.h
969 - Uniscribe: fix scratch-buffer accounting.
970 - Reorder Tai Tham SAKOT to after tone-marks.
973 hb-ot-shape-complex-hangul.cc
974 hb-ot-shape-complex-hebrew.cc
975 hb-ot-shape-complex-tibetan.cc
976 - Disable 'cswh' feature in Arabic shaper.
977 - Coretext: better handle surrogate pairs.
978 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.
981 Overview of changes leading to 0.9.25
982 Wednesday, December 4, 2013
983 =====================================
985 - Myanmar shaper improvements.
986 - Avoid font fallback in CoreText backend.
987 - Additional OpenType language tag mappiongs.
988 - More aggressive shape-plan caching.
989 - Build with / require automake 1.13.
990 - Build with libtool 2.4.2.418 alpha to support ppc64le.
993 Overview of changes leading to 0.9.24
994 Tuesday, November 13, 2013
995 =====================================
997 - Misc compiler warning fixes with clang.
998 - No functional changes.
1001 Overview of changes leading to 0.9.23
1002 Monday, October 28, 2013
1003 =====================================
1005 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.
1006 - Fix (Chain)Context recursion with non-monotone lookup positions.
1007 - Misc Indic bug fixes.
1008 - New Javanese / Buginese shaping, similar to Windows 8.1.
1011 Overview of changes leading to 0.9.22
1012 Thursday, October 3, 2013
1013 =====================================
1015 - Fix use-after-end-of-scope in hb_language_from_string().
1016 - Fix hiding of default_ignorables if font doesn't have space glyph.
1017 - Protect against out-of-range lookup indices.
1021 * Added hb_ot_layout_table_get_lookup_count()
1024 Overview of changes leading to 0.9.21
1025 Monday, September 16, 2013
1026 =====================================
1028 - Rename gobject-introspection library name from harfbuzz to HarfBuzz.
1029 - Remove (long disabled) hb-old and hb-icu-le test shapers.
1030 - Misc gtk-doc and gobject-introspection annotations.
1034 * Add HB_SET_VALUE_INVALID
1036 Overview of changes leading to 0.9.20
1037 Thursday, August 29, 2013
1038 =====================================
1041 - Misc substitute_closure() fixes.
1045 - gtk-doc boilerplate integrated. Docs are built now, but
1046 contain no contents. By next release hopefully we have
1047 some content in. Enable using --enable-gtk-doc.
1049 GObject and Introspection:
1050 - Added harfbuzz-gobject library (hb-gobject.h) that has type
1051 bindings for all HarfBuzz objects and enums. Enable using
1053 - Added gobject-introspection boilerplate. Nothing useful
1054 right now. Work in progress. Gets enabled automatically if
1055 --with-gobject is used. Override with --disable-introspection.
1058 - Apply 'mark' in Myanmar shaper.
1059 - Don't apply 'dlig' by default.
1062 - Support user features.
1063 - Fix loading of fonts that are also installed on the system.
1064 - Fix shaping of Arabic Presentation Forms.
1065 - Fix build with wide chars.
1068 - Support user features.
1071 - hb_face_t code moved to hb-face.h / hb-face.cc.
1072 - Added hb-deprecated.h.
1075 - Added HB_DISABLE_DEPRECATED.
1076 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by
1077 HB_SCRIPT_CANADIAN_SYLLABICS.
1078 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by
1079 HB_BUFFER_FLAG_DEFAULT.
1080 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by
1081 HB_BUFFER_SERIALIZE_FLAG_DEFAULT.
1084 Overview of changes leading to 0.9.19
1085 Tuesday, July 16, 2013
1086 =====================================
1089 - Better handling of multiple variation selectors in a row.
1090 - Pass on variation selector to GSUB if not consumed by cmap.
1091 - Fix undefined memory access.
1092 - Add Javanese config to Indic shaper.
1095 Overview of changes leading to 0.9.18
1096 Tuesday, May 28, 2013
1097 =====================================
1101 - All unneeded code is all disabled by default,
1103 - Uniscribe and CoreText shapers can be enabled with their --with options,
1105 - icu_le and old shapers cannot be enabled for now,
1107 - glib, freetype, and cairo will be detected automatically.
1108 They can be force on/off'ed with their --with options,
1110 - icu and graphite2 are default off, can be enabled with their --with
1113 Moreover, ICU support is now build into a separate library:
1114 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
1115 Distros can enable ICU now without every application on earth
1116 getting linked to via libharfbuzz.so.
1118 For distros I recommend that they make sure they are building --with-glib
1119 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
1120 And package harfbuzz and harfbuzz-icu separately.
1123 Overview of changes leading to 0.9.17
1124 Monday, May 20, 2013
1125 =====================================
1128 - Fix bug in hb_set_get_min().
1129 - Fix regression with Arabic mark positioning / width-zeroing.
1131 Overview of changes leading to 0.9.16
1132 Friday, April 19, 2013
1133 =====================================
1135 - Major speedup in OpenType lookup processing. With the Amiri
1136 Arabic font, this release is over 3x faster than previous
1137 release. All scripts / languages should see this speedup.
1139 - New --num-iterations option for hb-shape / hb-view; useful for
1142 Overview of changes leading to 0.9.15
1143 Friday, April 05, 2013
1144 =====================================
1147 - Fix crasher in graphite2 shaper.
1148 - Fix Arabic mark width zeroing regression.
1149 - Don't compose Hangul jamo into Unicode syllables.
1152 Overview of changes leading to 0.9.14
1153 Thursday, March 21, 2013
1154 =====================================
1157 - Fix time-consuming sanitize with malicious fonts.
1158 - Implement hb_buffer_deserialize_glyphs() for both json and text.
1159 - Do not ignore Hangul filler characters.
1161 * Fix Malayalam pre-base reordering interaction with post-forms.
1162 * Further adjust ZWJ handling. Should fix known regressions from
1166 Overview of changes leading to 0.9.13
1167 Thursday, February 25, 2013
1168 =====================================
1171 - Ngapi HarfBuzz Hackfest in London (February 2013):
1172 * Fixed all known Indic bugs,
1173 * New Win8-style Myanmar shaper,
1174 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue,
1175 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb
1176 matching GSUB/GPOS lookups,
1177 * Fix 'Phags-Pa U+A872 shaping,
1178 * Fix partial disabling of default-on features,
1179 * Allow disabling of TrueType kerning.
1180 - Fix possible crasher with broken fonts with overlapping tables.
1181 - Removed generated files from git again. So, one needs ragel to
1182 bootstrap from the git tree.
1185 - hb_shape() and related APIs now abort if buffer direction is
1186 HB_DIRECTION_INVALID. Previously, hb_shape() was calling
1187 hb_buffer_guess_segment_properties() on the buffer before
1188 shaping. The heuristics in that function are fragile. If the
1189 user really wants the old behvaior, they can call that function
1190 right before calling hb_shape() to get the old behavior.
1191 - hb_blob_create_sub_blob() always creates sub-blob with
1192 HB_MEMORY_MODE_READONLY. See comments for the reason.
1195 Overview of changes leading to 0.9.12
1196 Thursday, January 18, 2013
1197 =====================================
1199 - Build fixes for Sun compiler.
1202 Overview of changes leading to 0.9.11
1203 Thursday, January 10, 2013
1204 =====================================
1207 - Fix GPOS mark attachment with null Anchor offsets.
1208 - [Indic] Fix old-spec reordering of viramas if sequence ends in one.
1209 - Fix multi-threaded shaper data creation crash.
1210 - Add atomic ops for Solaris.
1213 - Rename hb_buffer_clear() to hb_buffer_clear_contents().
1216 Overview of changes leading to 0.9.10
1217 Thursday, January 3, 2013
1218 =====================================
1220 - [Indic] Fixed rendering of Malayalam dot-reph
1221 - Updated OT language tags.
1222 - Updated graphite2 backend.
1223 - Improved hb_ot_layout_get_size_params() logic.
1224 - Improve hb-shape/hb-view help output.
1225 - Fixed hb-set.h implementation to not crash.
1226 - Fixed various issues with hb_ot_layout_collect_lookups().
1227 - Various build fixes.
1231 hb_graphite2_face_get_gr_face()
1232 hb_graphite2_font_get_gr_font()
1233 hb_coretext_face_get_cg_font()
1237 hb_ot_layout_get_size_params()
1240 Overview of changes leading to 0.9.9
1241 Wednesday, December 5, 2012
1242 ====================================
1244 - Fix build on Windows.
1245 - Minor improvements.
1248 Overview of changes leading to 0.9.8
1249 Tuesday, December 4, 2012
1250 ====================================
1253 - Actually implement hb_shape_plan_get_shaper ().
1254 - Make UCDB data tables const.
1255 - Lots of internal refactoring in OTLayout tables.
1256 - Flesh out hb_ot_layout_lookup_collect_glyphs().
1260 hb_ot_layout_collect_lookups()
1261 hb_ot_layout_get_size_params()
1264 Overview of changes leading to 0.9.7
1265 Sunday, November 21, 2012
1266 ====================================
1269 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes.
1271 - Fix Arabic contextual joining using pre-context text.
1272 - Fix Sinhala "split matra" mess.
1273 - Fix Khmer shaping with broken fonts.
1274 - Implement Thai "PUA" shaping for old fonts.
1275 - Do NOT route Kharoshthi script through the Indic shaper.
1276 - Disable fallback positioning for Indic and Thai shapers.
1280 hb-shape / hb-view changes:
1282 - Add --text-before and --text-after
1283 - Add --bot / --eot / --preserve-default-ignorables
1284 - hb-shape --output-format=json
1293 HB_BUFFER_FLAGS_DEFAULT
1296 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES
1298 hb_buffer_set_flags()
1299 hb_buffer_get_flags()
1301 HB_BUFFER_SERIALIZE_FLAGS
1302 hb_buffer_serialize_glyphs()
1303 hb_buffer_deserialize_glyphs()
1304 hb_buffer_serialize_list_formats()
1308 hb_set_get_population()
1311 hb_face_[sg]et_glyph_count()
1313 hb_segment_properties_t
1314 HB_SEGMENT_PROPERTIES_DEFAULT
1315 hb_segment_properties_equal()
1316 hb_segment_properties_hash()
1318 hb_buffer_set_segment_properties()
1319 hb_buffer_get_segment_properties()
1321 hb_ot_layout_glyph_class_t
1322 hb_ot_layout_get_glyph_class()
1323 hb_ot_layout_get_glyphs_in_class()
1326 hb_shape_plan_create()
1327 hb_shape_plan_create_cached()
1328 hb_shape_plan_get_empty()
1329 hb_shape_plan_reference()
1330 hb_shape_plan_destroy()
1331 hb_shape_plan_set_user_data()
1332 hb_shape_plan_get_user_data()
1333 hb_shape_plan_execute()
1334 hb_shape_plan_get_shaper()
1336 hb_ot_shape_plan_collect_lookups()
1341 - Remove "mask" parameter from hb_buffer_add().
1342 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup().
1343 - hb-set.h API const correction.
1344 - Renamed hb_set_min/max() to hb_set_get_min/max().
1345 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups().
1346 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties().
1350 Overview of changes leading to 0.9.6
1351 Sunday, November 13, 2012
1352 ====================================
1354 - Don't clear pre-context text if no new context is provided.
1355 - Fix ReverseChainingSubstLookup, which was totally borked.
1356 - Adjust output format of hb-shape a bit.
1357 - Include config.h.in in-tree. Makes it easier for alternate build systems.
1358 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation.
1359 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache.
1360 - Drop glyphs for all of Unicode Default_Ignorable characters.
1364 - Enable 'dlig' and 'mset' features in Arabic shaper.
1365 - Implement 'Phags-pa shaping, improve Mongolian.
1368 - Decompose Sinhala split matras the way old HarfBuzz / Pango did.
1369 - Initial support for Consonant Medials.
1370 - Start adding new-style Myanmar shaping.
1371 - Make reph and 'pref' logic introspect the font.
1372 - Route Meetei-Mayek through the Indic shaper.
1373 - Don't apply 'liga' in Indic shaper.
1374 - Improve Malayalam pre-base reordering Ra interaction with Chillus.
1378 Overview of changes leading to 0.9.5
1379 Sunday, October 14, 2012
1380 ====================================
1382 - Synthetic-GSUB Arabic fallback shaping.
1384 - Misc Indic improvements.
1386 - Add build system support for pthread.
1388 - Imported UCDN for in-tree Unicode callbacks implementation.
1390 - Context-aware Arabic joining.
1396 hb_feature_to/from-string()
1397 hb_buffer_[sg]et_content_type()
1401 Overview of changes leading to 0.9.4
1402 Tuesday, Sep 03, 2012
1403 ====================================
1405 - Indic improvements with old-spec Malayalam.
1407 - Better fallback glyph positioning, specially with Thai / Lao marks.
1409 - Implement dotted-circle insertion.
1411 - Better Arabic fallback shaping / ligation.
1413 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
1419 Overview of changes leading to 0.9.3
1420 Friday, Aug 18, 2012
1421 ====================================
1423 - Fixed fallback mark positioning for left-to-right text.
1425 - Improve mark positioning for the remaining combining classes.
1427 - Unbreak Thai and fallback Arabic shaping.
1429 - Port Arabic shaper to shape-plan caching.
1431 - Use new ICU normalizer functions.
1435 Overview of changes leading to 0.9.2
1436 Friday, Aug 10, 2012
1437 ====================================
1439 - Over a thousand commits! This is the first major release of HarfBuzz.
1441 - HarfBuzz is feature-complete now! It should be in par, or better, than
1442 both Pango's shapers and old HarfBuzz / Qt shapers.
1444 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
1446 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
1447 Sinhala, N'ko, Mongolian, and Mandaic.
1449 - New Thai / Lao shaper.
1451 - Tibetan / Hangul support in the generic shaper.
1453 - Synthetic GDEF support for fonts without a GDEF table.
1455 - Fallback mark positioning for fonts without a GPOS table.
1457 - Unicode normalization shaping heuristic during glyph mapping.
1459 - New experimental Graphite2 backend.
1461 - New Uniscribe backend (primarily for testing).
1463 - New CoreText backend (primarily for testing).
1465 - Major optimization and speedup.
1467 - Test suites and testing infrastructure (work in progress).
1469 - Greatly improved hb-view cmdline tool.
1471 - hb-shape cmdline tool.
1473 - Unicode 6.1 support.
1475 Summary of API changes:
1479 - Users are expected to only include main header files now (ie. hb.h,
1480 hb-glib.h, hb-ft.h, ...)
1482 - All struct tag names had their initial underscore removed.
1483 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
1485 - All set_user_data() functions now take a "replace" boolean parameter.
1487 - hb_buffer_create() takes zero arguments now.
1488 Use hb_buffer_pre_allocate() to pre-allocate.
1490 - hb_buffer_add_utf*() now accept -1 for length parameteres,
1491 meaning "nul-terminated".
1493 - hb_direction_t enum values changed.
1495 - All *_from_string() APIs now take a length parameter to allow for
1496 non-nul-terminated strings. A -1 length means "nul-terminated".
1498 - Typedef for hb_language_t changed.
1500 - hb_get_table_func_t renamed to hb_reference_table_func_t.
1502 - hb_ot_layout_table_choose_script()
1504 - Various renames in hb-unicode.h.
1508 - hb_buffer_guess_properties()
1509 Automatically called by hb_shape().
1511 - hb_buffer_normalize_glyphs()
1513 - hb_tag_from_string()
1519 - hb_face_reference_blob()
1520 - hb_face_[sg]et_index()
1521 - hb_face_set_upem()
1523 - hb_font_get_glyph_name_func_t
1524 hb_font_get_glyph_from_name_func_t
1525 hb_font_funcs_set_glyph_name_func()
1526 hb_font_funcs_set_glyph_from_name_func()
1527 hb_font_get_glyph_name()
1528 hb_font_get_glyph_from_name()
1529 hb_font_glyph_to_string()
1530 hb_font_glyph_from_string()
1532 - hb_font_set_funcs_data()
1534 - hb_ft_font_set_funcs()
1535 - hb_ft_font_get_face()
1537 - hb-gobject.h (work in progress)
1539 - hb_ot_shape_glyphs_closure()
1540 hb_ot_layout_substitute_closure_lookup()
1546 - hb_unicode_combining_class_t
1548 - hb_unicode_compose_func_t
1549 hb_unicode_decompose_func_t
1550 hb_unicode_decompose_compatibility_func_t
1551 hb_unicode_funcs_set_compose_func()
1552 hb_unicode_funcs_set_decompose_func()
1553 hb_unicode_funcs_set_decompose_compatibility_func()
1554 hb_unicode_compose()
1555 hb_unicode_decompose()
1556 hb_unicode_decompose_compatibility()
1560 - hb_ft_get_font_funcs()
1562 - hb_ot_layout_substitute_start()
1563 hb_ot_layout_substitute_lookup()
1564 hb_ot_layout_substitute_finish()
1565 hb_ot_layout_position_start()
1566 hb_ot_layout_position_lookup()
1567 hb_ot_layout_position_finish()
1571 Overview of changes leading to 0.6.0
1572 Friday, May 27, 2011
1573 ====================================
1575 - Vertical text support in GPOS
1576 - Almost all API entries have unit tests now, under test/
1577 - All thread-safety issues are fixed
1579 Summary of API changes follows.
1586 hb_language_get_default()
1587 hb_direction_to_string()
1588 hb_direction_from_string()
1589 hb_script_get_horizontal_direction()
1593 hb_category_t renamed to hb_unicode_general_category_t
1596 hb_language_t is a typed pointers now
1602 * Use ISO 15924 tags for hb_script_t:
1605 hb_script_from_iso15924_tag()
1606 hb_script_to_iso15924_tag()
1607 hb_script_from_string()
1610 HB_SCRIPT_* enum members changed value.
1613 * Buffer API streamlined:
1617 hb_buffer_set_length()
1618 hb_buffer_allocation_successful()
1621 hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
1622 hb_buffer_add_glyph() renamed to hb_buffer_add()
1626 hb_buffer_clear_positions()
1629 hb_buffer_get_glyph_infos() takes an out length parameter now
1630 hb_buffer_get_glyph_positions() takes an out length parameter now
1633 * Blob API streamlined:
1637 hb_blob_get_data_writable()
1640 hb_blob_create_empty() renamed to hb_blob_get_empty()
1645 hb_blob_is_writable()
1646 hb_blob_try_writable()
1649 hb_blob_create() takes user_data before destroy now
1652 * Unicode functions API:
1654 o Unicode function vectors can subclass other unicode function vectors now.
1655 Unimplemented callbacks in the subclass automatically chainup to the parent.
1657 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
1658 take a user_data and its respective destroy callback.
1661 hb_unicode_funcs_get_empty()
1662 hb_unicode_funcs_get_default()
1663 hb_unicode_funcs_get_parent()
1666 hb_unicode_funcs_create() now takes a parent_funcs.
1668 o Removed func getter functions:
1669 hb_unicode_funcs_get_mirroring_func()
1670 hb_unicode_funcs_get_general_category_func()
1671 hb_unicode_funcs_get_script_func()
1672 hb_unicode_funcs_get_combining_class_func()
1673 hb_unicode_funcs_get_eastasian_width_func()
1679 hb_face_get_table() renamed to hb_face_reference_table()
1680 hb_face_create_for_data() renamed to hb_face_create()
1683 hb_face_create_for_tables() takes user_data before destroy now
1684 hb_face_reference_table() returns empty blob instead of NULL
1685 hb_get_table_func_t accepts the face as first parameter now
1689 o Fonts can subclass other fonts now. Unimplemented callbacks in the
1690 subclass automatically chainup to the parent. When chaining up,
1691 scale is adjusted if the parent font has a different scale.
1693 o All hb_font_funcs_t callbacks take a user_data now. Their setters
1694 take a user_data and its respective destroy callback.
1697 hb_font_get_parent()
1698 hb_font_funcs_get_empty()
1699 hb_font_create_sub_font()
1702 hb_font_funcs_copy()
1703 hb_font_unset_funcs()
1705 o Removed func getter functions:
1706 hb_font_funcs_get_glyph_func()
1707 hb_font_funcs_get_glyph_advance_func()
1708 hb_font_funcs_get_glyph_extents_func()
1709 hb_font_funcs_get_contour_point_func()
1710 hb_font_funcs_get_kerning_func()
1713 hb_font_create() takes a face and references it now
1714 hb_font_set_funcs() takes user_data before destroy now
1715 hb_font_set_scale() accepts signed integers now
1716 hb_font_get_contour_point_func_t now takes glyph first, then point_index
1717 hb_font_get_glyph_func_t returns a success boolean now
1720 * Changed object model:
1722 o All object types have a _get_empty() now:
1724 hb_buffer_get_empty()
1727 hb_font_funcs_get_empty()
1728 hb_unicode_funcs_get_empty()
1730 o Added _set_user_data() and _get_user_data() for all object types:
1731 hb_blob_get_user_data()
1732 hb_blob_set_user_data()
1733 hb_buffer_get_user_data()
1734 hb_buffer_set_user_data()
1735 hb_face_get_user_data()
1736 hb_face_set_user_data()
1737 hb_font_funcs_get_user_data()
1738 hb_font_funcs_set_user_data()
1739 hb_font_get_user_data()
1740 hb_font_set_user_data()
1741 hb_unicode_funcs_get_user_data()
1742 hb_unicode_funcs_set_user_data()
1744 o Removed the _get_reference_count() from all object types:
1745 hb_blob_get_reference_count()
1746 hb_buffer_get_reference_count()
1747 hb_face_get_reference_count()
1748 hb_font_funcs_get_reference_count()
1749 hb_font_get_reference_count()
1750 hb_unicode_funcs_get_reference_count()
1752 o Added _make_immutable() and _is_immutable() for all object types except for buffer:
1753 hb_blob_make_immutable()
1754 hb_blob_is_immutable()
1755 hb_face_make_immutable()
1756 hb_face_is_immutable()
1759 * Changed API for vertical text support
1761 o The following callbacks where removed:
1762 hb_font_get_glyph_advance_func_t
1763 hb_font_get_kerning_func_t
1765 o The following new callbacks added instead:
1766 hb_font_get_glyph_h_advance_func_t
1767 hb_font_get_glyph_v_advance_func_t
1768 hb_font_get_glyph_h_origin_func_t
1769 hb_font_get_glyph_v_origin_func_t
1770 hb_font_get_glyph_h_kerning_func_t
1771 hb_font_get_glyph_v_kerning_func_t
1773 o The following API removed as such:
1774 hb_font_funcs_set_glyph_advance_func()
1775 hb_font_funcs_set_kerning_func()
1776 hb_font_get_glyph_advance()
1777 hb_font_get_kerning()
1779 o New API added instead:
1780 hb_font_funcs_set_glyph_h_advance_func()
1781 hb_font_funcs_set_glyph_v_advance_func()
1782 hb_font_funcs_set_glyph_h_origin_func()
1783 hb_font_funcs_set_glyph_v_origin_func()
1784 hb_font_funcs_set_glyph_h_kerning_func()
1785 hb_font_funcs_set_glyph_v_kerning_func()
1786 hb_font_get_glyph_h_advance()
1787 hb_font_get_glyph_v_advance()
1788 hb_font_get_glyph_h_origin()
1789 hb_font_get_glyph_v_origin()
1790 hb_font_get_glyph_h_kerning()
1791 hb_font_get_glyph_v_kerning()
1793 o The following higher-leve API added for convenience:
1794 hb_font_get_glyph_advance_for_direction()
1795 hb_font_get_glyph_origin_for_direction()
1796 hb_font_add_glyph_origin_for_direction()
1797 hb_font_subtract_glyph_origin_for_direction()
1798 hb_font_get_glyph_kerning_for_direction()
1799 hb_font_get_glyph_extents_for_origin()
1800 hb_font_get_glyph_contour_point_for_origin()
1803 * OpenType Layout API:
1806 hb_ot_layout_position_start()
1807 hb_ot_layout_substitute_start()
1808 hb_ot_layout_substitute_finish()
1814 hb_glib_script_to_script()
1815 hb_glib_script_from_script()
1816 hb_icu_script_to_script()
1817 hb_icu_script_from_script()
1820 * Version API added: