Overview of changes leading to 1.4.8

Tuesday, August 8, 2017

====================================

- Major fix to avar table handling.

- Rename hb-shape --show-message to --trace.

- Build fixes.

Overview of changes leading to 1.4.7

Tuesday, July 18, 2017

====================================

- Multiple Indic, Tibetan, and Cham fixes.

- CoreText: Allow disabling kerning.

- Adjust Arabic feature order again.

- Misc build fixes.

Overview of changes leading to 1.4.6

Sunday, April 23, 2017

====================================

- Graphite2: Fix RTL positioning issue.

- Backlist GDEF of more versions of Padauk and Tahoma.

- New, experimental, cmake alternative build system.

Overview of changes leading to 1.4.5

Friday, March 10, 2017

====================================

- Revert "Fix Context lookup application when moving back after a glyph..."

  This introduced memory access problems.  To be fixed properly soon.

Overview of changes leading to 1.4.4

Sunday, March 5, 2017

====================================

- Fix Context lookup application when moving back after a glyph deletion.

- Fix buffer-overrun in Bengali.

Overview of changes leading to 1.4.3

Saturday, February 25, 2017

====================================

- Route Adlam script to Arabic shaper.

- Misc fixes.

- New API:

  hb_font_set_face()

- Deprecate API:

  hb_graphite2_font_get_gr_font()

Overview of changes leading to 1.4.2

Monday, January 23, 2017

====================================

- Implement OpenType Font Variation tables avar/fvar/HVAR/VVAR.

- hb-shape and hb-view now accept --variations.

- New API:

hb_variation_t

hb_variation_from_string()

hb_variation_to_string()

hb_font_set_variations()

hb_font_set_var_coords_design()

hb_font_get_var_coords_normalized()

hb-ot-var.h:

hb_ot_var_axis_t

hb_ot_var_has_data()

hb_ot_var_get_axis_count()

hb_ot_var_get_axes()

hb_ot_var_find_axis()

hb_ot_var_normalize_variations()

hb_ot_var_normalize_coords()

- MVAR to be implemented later.  Access to named instances to be

  implemented later as well.

- Misc fixes.

Overview of changes leading to 1.4.1

Thursday, January 5, 2017

====================================

- Always build and use UCDN for Unicode data by default.

  Reduces dependence on version of Unicode data in glib,

  specially in the Windows bundles we are shipping, which

  have very old glib.

Overview of changes leading to 1.4.0

Thursday, January 5, 2017

====================================

- Merged "OpenType GX" branch which adds core of support for

  OpenType 1.8 Font Variations.  To that extent, the relevant

  new API is:

New API:

hb_font_set_var_coords_normalized()

  with supporting API:

New API:

HB_OT_LAYOUT_NO_VARIATIONS_INDEX

hb_ot_layout_table_find_feature_variations()

hb_ot_layout_feature_with_variations_get_lookups()

hb_shape_plan_create2()

hb_shape_plan_create_cached2()

  Currently variations in GSUB/GPOS/GDEF are fully supported,

  and no other tables are supported.  In particular, fvar/avar

  are NOT supported, hence the hb_font_set_var_coords_normalized()

  taking normalized coordinates.  API to take design coordinates

  will be added in the future.

  HVAR/VVAR/MVAR support will also be added to hb-ot-font in the

  future.

- Fix regression in GDEF glyph class processing.

- Add decompositions for Chakma, Limbu, and Balinese in USE shaper.

- Misc fixes.

Overview of changes leading to 1.3.4

Monday, December 5, 2016

====================================

- Fix vertical glyph origin in hb-ot-font.

- Implement CBDT/CBLC color font glyph extents in hb-ot-font.

Overview of changes leading to 1.3.3

Wednesday, September 28, 2016

====================================

- Implement parsing of OpenType MATH table.

New API:

HB_OT_TAG_MATH

HB_OT_MATH_SCRIPT

hb_ot_math_constant_t

hb_ot_math_kern_t

hb_ot_math_glyph_variant_t

hb_ot_math_glyph_part_flags_t

hb_ot_math_glyph_part_t

hb_ot_math_has_data

hb_ot_math_get_constant

hb_ot_math_get_glyph_italics_correction

hb_ot_math_get_glyph_top_accent_attachment

hb_ot_math_get_glyph_kerning

hb_ot_math_is_glyph_extended_shape

hb_ot_math_get_glyph_variants

hb_ot_math_get_min_connector_overlap

hb_ot_math_get_glyph_assembly

Overview of changes leading to 1.3.2

Wednesday, September 27, 2016

====================================

- Fix build of hb-coretext on older OS X versions.

Overview of changes leading to 1.3.1

Wednesday, September 7, 2016

====================================

- Blacklist bad GDEF of more fonts (Padauk).

- More CoreText backend crash fixes with OS X 10.9.5.

- Misc fixes.

Overview of changes leading to 1.3.0

Thursday, July 21, 2016

====================================

- Update to Unicode 9.0.0

- Move Javanese from Indic shaper to Universal Shaping Engine.

- Allow MultipleSubst to delete a glyph (matching Windows engine).

- Update Universal Shaping Engine to latest draft from Microsoft.

- DirectWrite backend improvements.  Note: this backend is for testing ONLY.

- CoreText backend improvements with unreachable fonts.

- Implement symbol fonts (cmap 3.0.0) in hb-ft and hb-ot-font.

- Blacklist bad GDEF of more fonts (Tahoma & others).

- Misc fixes.

Overview of changes leading to 1.2.7

Monday, May 2, 2016

====================================

- Blacklist another version of Times New Roman (Bold) Italic from Windows 7.

- Fix Mongolian Free Variation Selectors shaping with certain fonts.

- Fix Tibetan shorthand contractions shaping.

- Improved list of language tag mappings.

- Unbreak build on Windows CE.

- Make 'glyf' table loading lazy in hb-ot-font.

Overview of changes leading to 1.2.6

Friday, April 8, 2016

====================================

- Blacklist GDEF table of another set of Times New Roman (Bold) Italic.

- DirectWrite backend improvements.  Note: DirectWrite backend is

  exclusively for our internal testing and should NOT be used in any

  production system whatsoever.

Overview of changes leading to 1.2.5

Monday, April 4, 2016

====================================

- Fix GDEF mark-filtering-set, which was broken in 1.2.3.

Overview of changes leading to 1.2.4

Thursday, March 17, 2016

====================================

- Synthesize GDEF glyph class for any glyph that does not have one in GDEF.

  I really hope we don't discover broken fonts that shape badly with this

  change.

- Misc build and other minor fixes.

- API changes:

  - Added HB_NDEBUG.  It's fine for production systems to define this to

    disable high-overhead debugging checks.  However, I also reduced the

    overhead of those checks, so it's a non-issue right now.  You can

    forget it.  Just not defining anything at all is fine.

Overview of changes leading to 1.2.3

Thursday, February 25, 2016

====================================

- Blacklist GDEF table of certain versions of Times New Roman (Bold) Italic,

  due to bug in glyph class of ASCII double-quote character.  This should

  address "regression" introduced in 1.2.0 when we switched mark zeroing

  in most shapers from BY_UNICODE_LATE to BY_GDEF_LATE.

  This fourth release in a week should finally stablize things...

- hb-ot-font's get_glyph() implementation saw some optimizations.  Though,

  might be really hard to measure in real-world situations.

- Also, two rather small API changes:

We now disable some time-consuming internal bookkeeping if built with NDEBUG

defined.  This is a first time that we use NDEBUG to disable debug code.  If

there exist production systems that do NOT want to enable NDEBUG, please let

me know and I'll add HB_NDEBUG.

Added get_nominal_glyph() and get_variation_glyph() instead of get_glyph()

New API:

- hb_font_get_nominal_glyph_func_t

- hb_font_get_variation_glyph_func_t

- hb_font_funcs_set_nominal_glyph_func()

- hb_font_funcs_set_variation_glyph_func()

- hb_font_get_nominal_glyph()

- hb_font_get_variation_glyph()

Deprecated API:

- hb_font_get_glyph_func_t

- hb_font_funcs_set_glyph_func()

Clients that implement their own font-funcs are encouraged to replace

their get_glyph() implementation with a get_nominal_glyph() and

get_variation_glyph() pair.  The variation version can assume that

variation_selector argument is not zero.  Old (deprecated) functions

will continue working indefinitely using internal gymnastics; it is

just more efficient to use the new functions.

Overview of changes leading to 1.2.2

Wednesday, February 24, 2016

====================================

- Fix regression with mark positioning with fonts that have

  non-zero mark advances.  This was introduced in 1.2.0 while

  trying to make mark and cursive attachments to work together.

  I have partially reverted that, so this version is much more

  like what we had before.  All clients who updated to 1.2.0

  should update to this version.

Overview of changes leading to 1.2.1

Tuesday, February 23, 2016

====================================

- CoreText: Fix bug with wrong scale if font scale was changed later.

  https://github.com/libass/libass/issues/212

- CoreText: Drastically speed up font initialization.

- CoreText: Fix tiny leak.

- Group ZWJ/ZWNJ with previous syllable under cluster-level=0.

  https://github.com/behdad/harfbuzz/issues/217

- Add test/shaping/README.md about how to add tests to the suite.

Overview of changes leading to 1.2.0

Friday, February 19, 2016

====================================

- Fix various issues (hangs mostly) in case of memory allocation failure.

- Change mark zeroing types of most shapers from BY_UNICODE_LATE to

  BY_GDEF_LATE.  This seems to be what Uniscribe does.

- Change mark zeroing of USE shaper from NONE to BY_GDEF_EARLY.  That's

  what Windows does.

- Allow GPOS cursive connection on marks, and fix the interaction with

  mark attachment.  This work resulted in some changes to how mark

  attachments work.  See:

  https://github.com/behdad/harfbuzz/issues/211

  https://github.com/behdad/harfbuzz/commit/86c68c7a2c971efe8e35b1f1bd99401dc8b688d2

- Graphite2 shaper: improved negative advance handling (eg. Nastaliq).

- Add nmake-based build system for Windows.

- Minor speedup.

- Misc. improvements.

Overview of changes leading to 1.1.3

Monday, January 11, 2016

====================================

- Ported Indic shaper to Unicode 8.0 data.

- Universal Shaping Engine fixes.

- Speed up CoreText shaper when font fallback happens in CoreText.

- Documentation improvements, thanks to Khaled Hosny.

- Very rough directwrite shaper for testing, thanks to Ebrahim Byagowi.

- Misc bug fixes.

- New API:

  * Font extents:

      hb_font_extents_t

      hb_font_get_font_extents_func_t

      hb_font_get_font_h_extents_func_t

      hb_font_get_font_v_extents_func_t

      hb_font_funcs_set_font_h_extents_func

      hb_font_funcs_set_font_v_extents_func

      hb_font_get_h_extents

      hb_font_get_v_extents

      hb_font_get_extents_for_direction

  * Buffer message (aka debug):

      hb_buffer_message_func_t

      hb_buffer_set_message_func()

    Actual message protocol to be fleshed out later.

Overview of changes leading to 1.1.2

Wednesday, November 26, 2015

====================================

- Fix badly-broken fallback shaper that affected terminology.

  https://github.com/behdad/harfbuzz/issues/187

- Fix y_scaling in Graphite shaper.

- API changes:

  * An unset glyph_h_origin() function in font-funcs now (sensibly)

    implies horizontal origin at 0,0.  Ie, the nil callback returns

    true instead of false.  As such, implementations that have a

    glyph_h_origin() that simply returns true, can remove that function

    with HarfBuzz >= 1.1.2.  This results in a tiny speedup.

Overview of changes leading to 1.1.1

Wednesday, November 24, 2015

====================================

- Build fixes, specially for hb-coretext.

Overview of changes leading to 1.1.0

Wednesday, November 18, 2015

====================================

- Implement 'stch' stretch feature for Syriac Abbreviation Mark.

  https://github.com/behdad/harfbuzz/issues/141

- Disable use of decompose_compatibility() callback.

- Implement "shaping" of various Unicode space characters, even

  if the font does not support them.

  https://github.com/behdad/harfbuzz/issues/153

- If font does not support U+2011 NO-BREAK HYPHEN, fallback to

  U+2010 HYPHEN.

- Changes resulting from libFuzzer continuous fuzzing:

  * Reject font tables that need more than 8 edits,

  * Bound buffer growth during shaping to 32x,

  * Fix assertions and other issues at OOM / buffer max-growth.

- Misc fixes and optimizations.

- API changes:

  * All fonts created with hb_font_create() now inherit from

    (ie. have parent) hb_font_get_empty().

Overview of changes leading to 1.0.6

Thursday, October 15, 2015

====================================

- Reduce max nesting level in OT lookups from 8 to 6.

  Should not affect any real font as far as I know.

- Fix memory access issue in ot-font.

- Revert default load-flags of fonts created using hb_ft_font_create()

  back to FT_LOAD_DEFAULT|FT_LOAD_NO_HINTING.  This was changed in

  last release (1.0.5), but caused major issues, so revert.

  https://github.com/behdad/harfbuzz/issues/143

Overview of changes leading to 1.0.5

Tuesday, October 13, 2015

====================================

- Fix multiple memory access bugs discovered using libFuzzer.

  https://github.com/behdad/harfbuzz/issues/139

  Everyone should upgrade to this version as soon as possible.

  We now have continuous fuzzing set up, to avoid issues like

  these creeping in again.

- Misc fixes.

- New API:

  * hb_font_set_parent().

  * hb_ft_font_[sg]et_load_flags()

    The default flags for fonts created using hb_ft_font_create()

    has changed to default to FT_LOAD_DEFAULT now.  Previously it

    was defaulting to FT_LOAD_DFEAULT|FT_LOAD_NO_HINTING.

- API changes:

  * Fonts now default to units-per-EM as their scale, instead of 0.

  * hb_font_create_sub_font() does NOT make parent font immutable

    anymore.  hb_font_make_immutable() does.

Overview of changes leading to 1.0.4

Wednesday, September 30, 2015

====================================

- Fix minor out-of-bounds read error.

Overview of changes leading to 1.0.3

Tuesday, September 1, 2015

====================================

- Start of user documentation, from Simon Cozens!

- Implement glyph_extents() for TrueType fonts in hb-ot-font.

- Improve GPOS cursive attachments with conflicting lookups.

- More fixes for cluster-level = 1.

- Uniscribe positioning fix.

Overview of changes leading to 1.0.2

Wednesday, August 19, 2015

====================================

- Fix shaping with cluster-level > 0.

- Fix Uniscribe backend font-size scaling.

- Declare dependencies in harfbuzz.pc.

  FreeType is not declared though, to avoid bugs in pkg-config

  0.26 with recursive dependencies.

- Slightly improved debug infrastructure.  More to come later.

- Misc build fixes.

Overview of changes leading to 1.0.1

Monday, July 27, 2015

====================================

- Fix out-of-bounds access in USE shaper.

Overview of changes leading to 1.0.0

Sunday, July 26, 2015

====================================

- Implement Universal Shaping Engine:

  https://www.microsoft.com/typography/OpenTypeDev/USE/intro.htm

  http://blogs.windows.com/bloggingwindows/2015/02/23/windows-shapes-the-worlds-languages/

- Bump version to 1.0.0.  The soname was NOT bumped.

Overview of changes leading to 0.9.42

Thursday, July 26, 2015

=====================================

- New API to allow for retrieving finer-grained cluster

  mappings if the client desires to handle them.  Default

  behavior is unchanged.

- Fix cluster merging when removing default-ignorables.

- Update to Unicode 8.0

- hb-graphite2 fixes.

- Misc fixes.

- Removed HB_NO_MERGE_CLUSTERS hack.

- New API:

  hb_buffer_cluster_level_t enum

  hb_buffer_get_cluster_level()

  hb_buffer_set_cluster_level()

  hb-shape / hb-view --cluster-level

Overview of changes leading to 0.9.41

Thursday, June 18, 2015

=====================================

- Fix hb-coretext with trailing whitespace in right-to-left.

- New API: hb_buffer_reverse_range().

- Allow implementing atomic ops in config.h.

- Fix hb_language_t in language bindings.

- Misc fixes.

Overview of changes leading to 0.9.40

Friday, March 20, 2015

=====================================

- Another hb-coretext crasher fix.  Ouch!

- Happy Norouz!

Overview of changes leading to 0.9.39

Wednesday, March 4, 2015

=====================================

- Critical hb-coretext fixes.

- Optimizations and refactoring; no functional change

  expected.

- Misc build fixes.

Overview of changes leading to 0.9.38

Friday, January 23, 2015

=====================================

- Fix minor out-of-bounds access in Indic shaper.

- Change New Tai Lue shaping engine from South-East Asian to default,

  reflecting change in Unicode encoding model.

- Add hb-shape --font-size.  Can take up to two numbers for separate

  x / y size.

- Fix CoreText and FreeType scale issues with negative scales.

- Reject blobs larger than 2GB.  This might break some icu-le-hb clients

  that need security fixes.  See:

  http://www.icu-project.org/trac/ticket/11450

- Avoid accessing font tables during face destruction, in casce rogue

  clients released face data already.

- Fix up gobject-introspection a bit.  Python bindings kinda working.

  See README.python.

- Misc fixes.

- API additions:

  hb_ft_face_create_referenced()

  hb_ft_font_create_referenced()

Overview of changes leading to 0.9.37

Wednesday, December 17, 2014

=====================================

- Fix out-of-bounds access in Context lookup format 3.

- Indic: Allow ZWJ/ZWNJ before syllable modifiers.

Overview of changes leading to 0.9.36

Thursday, November 20, 2014

=====================================

- First time that three months went by without a release since

  0.9.2 was released on August 10, 2012!

- Fix performance bug in hb_ot_collect_glyphs():

  https://bugzilla.mozilla.org/show_bug.cgi?id=1090869

- Add basic vertical-text support to hb-ot-font.

- Misc build fixes.

Overview of changes leading to 0.9.35

Saturday, August 13, 2014

=====================================

- Fix major shape-plan caching bug when more than one shaper were

  provided to hb_shape_full() (as exercised by XeTeX).

  http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html

- Fix Arabic fallback shaping regression.  This was broken in 0.9.32.

- Major hb-coretext fixes.  That backend is complete now, including

  respecing buffer direction and language, down to vertical writing.

- Build fixes for Windows CE.  Should build fine now.

- Misc fixes:

  Use atexit() only if it's safe to call from shared library

  https://bugs.freedesktop.org/show_bug.cgi?id=82246

  Mandaic had errors in its Unicode Joining_Type

  https://bugs.freedesktop.org/show_bug.cgi?id=82306

- API changes:

  * hb_buffer_clear_contents() does not reset buffer flags now.

    After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't

    need to set flags for different pieces of text.  The flags now

    are something the client sets up once, depending on how it

    actually uses the buffer.  As such, don't clear it in

    clear_contents().

    I don't expect any changes to be needed to any existing client.

Overview of changes leading to 0.9.34

Saturday, August 2, 2014

=====================================

- hb_feature_from_string() now accepts CSS font-feature-settings format.

- As a result, hb-shape / hb-view --features also accept CSS-style strings.

  Eg, "'liga' off" is accepted now.

- Add old-spec Myanmar shaper:

  https://bugs.freedesktop.org/show_bug.cgi?id=81775

- Don't apply 'calt' in Hangul shaper.

- Fix mark advance zeroing for Hebrew shaper:

  https://bugs.freedesktop.org/show_bug.cgi?id=76767

- Implement Windows-1256 custom Arabic shaping.  Only built on Windows,

  and requires help from get_glyph().  Used by Firefox.

  https://bugzilla.mozilla.org/show_bug.cgi?id=1045139

- Disable 'liga' in vertical text.

- Build fixes.

- API changes:

  * Make HB_BUFFER_FLAG_BOT/EOT easier to use.

    Previously, we expected users to provide BOT/EOT flags when the

    text *segment* was at paragraph boundaries.  This meant that for

    clients that provide full paragraph to HarfBuzz (eg. Pango), they

    had code like this:

      hb_buffer_set_flags (hb_buffer,

                           (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) |

                           (item_offset + item_length == paragraph_length ?

                            HB_BUFFER_FLAG_EOT : 0));

      hb_buffer_add_utf8 (hb_buffer,

                          paragraph_text, paragraph_length,

                          item_offset, item_length);

    After this change such clients can simply say:

      hb_buffer_set_flags (hb_buffer,

                           HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT);

      hb_buffer_add_utf8 (hb_buffer,

                          paragraph_text, paragraph_length,

                          item_offset, item_length);

    Ie, HarfBuzz itself checks whether the segment is at the beginning/end

    of the paragraph.  Clients that only pass item-at-a-time to HarfBuzz

    continue not setting any flags whatsoever.

    Another way to put it is: if there's pre-context text in the buffer,

    HarfBuzz ignores the BOT flag.  If there's post-context, it ignores

    EOT flag.

Overview of changes leading to 0.9.33

Tuesday, July 22, 2014

=====================================

- Turn off ARabic 'cswh' feature that was accidentally turned on.

- Add HB_TAG_MAX_SIGNED.

- Make hb_face_make_immutable() really make face immutable!

- Windows build fixes.

Overview of changes leading to 0.9.32

Thursday, July 17, 2014

=====================================

- Apply Arabic shaping features in spec order exactly.

- Another fix for Mongolian free variation selectors.

- For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt'

  together.

- Minor adjustment to U+FFFD logic.

- Fix hb-coretext build.

Overview of changes leading to 0.9.31

Wednesday, July 16, 2014

=====================================

- Only accept valid UTF-8/16/32; we missed many cases before.

- Better shaping of invalid UTF-8/16/32.  Falls back to

  U+FFFD REPLACEMENT CHARACTER now.

- With all changes in this release, the buffer will contain fully

  valid Unicode after hb_buffer_add_utf8/16/32 no matter how

  broken the input is.  This can be overriden though.  See below.

- Fix Mongolian Variation Selectors for fonts without GDEF.

- Fix minor invalid buffer access.

- Accept zh-Hant and zh-Hans language tags.  hb_ot_tag_to_language()

  now uses these instead of private tags.

- Build fixes.

- New API:

  * hb_buffer_add_codepoints().  This does what hb_buffer_add_utf32()

    used to do, ie. no validity check on the input at all.  add_utf32

    now replaces invalid Unicode codepoints with the replacement

    character (see below).

  * hb_buffer_set_replacement_codepoint()

  * hb_buffer_get_replacement_codepoint()

    Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when

    we detected broken input, we replaced that with (hb_codepoint_t)-1.

    This has changed to use U+FFFD now, but can be changed using these

    new API.

Overview of changes leading to 0.9.30

Wednesday, July 9, 2014

=====================================

- Update to Unicode 7.0.0:

  * New scripts Manichaean and Psalter Pahlavi are shaped using

    Arabic shaper.

  * All the other new scripts to through the generic shaper for

    now.

- Minor Indic improvements.

- Fix graphite2 backend cluster mapping [crasher!]

- API changes:

  * New HB_SCRIPT_* values for Unicode 7.0 scripts.

  * New function hb_ot_layout_language_get_required_feature().

- Build fixes.

Overview of changes leading to 0.9.29

Thursday, May 29, 2014

=====================================

- Implement cmap in hb-ot-font.h.  No variation-selectors yet.

- Myanmar: Allow MedialYa+Asat.

- Various Indic fixes:

  * Support most characters in Extended Devanagary and Vedic

    Unicode blocks.

  * Allow digits and a some punctuation as consonant placeholders.

- Build fixes.

Overview of changes leading to 0.9.28

Monday, April 28, 2014

=====================================

- Unbreak old-spec Indic shaping. (bug 76705)

- Fix shaping of U+17DD and U+0FC6.

- Add HB_NO_MERGE_CLUSTERS build option.  NOT to be enabled by default

  for shipping libraries.  It's an option for further experimentation

  right now.  When we are sure how to do it properly, we will add

  public run-time API for the functionality.

- Build fixes.

Overview of changes leading to 0.9.27

Tuesday, March 18, 2014

=====================================

- Don't use "register" storage class specifier

- Wrap definition of free_langs() with HAVE_ATEXIT

- Add coretext_aat shaper and hb_coretext_face_create() constructor

- If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks

- Add Myanmar test case from OpenType Myanmar spec

- Only do fallback Hebrew composition if no GPOS 'mark' available

- Allow bootstrapping without gtk-doc

- Use AM_MISSING_PROG for ragel and git

- Typo in ucdn's Makefile.am

- Improve MemoryBarrier() implementation

Overview of changes leading to 0.9.26

Thursday, January 30, 2014

=====================================

- Misc fixes.

- Fix application of 'rtlm' feature.

- Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH.

- New header: hb-ot-shape.h

- Uniscribe: fix scratch-buffer accounting.

- Reorder Tai Tham SAKOT to after tone-marks.

- Add Hangul shaper.

- New files:

  hb-ot-shape-complex-hangul.cc

  hb-ot-shape-complex-hebrew.cc

  hb-ot-shape-complex-tibetan.cc

- Disable 'cswh' feature in Arabic shaper.

- Coretext: better handle surrogate pairs.

- Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE.

Overview of changes leading to 0.9.25

Wednesday, December 4, 2013

=====================================

- Myanmar shaper improvements.

- Avoid font fallback in CoreText backend.

- Additional OpenType language tag mappiongs.

- More aggressive shape-plan caching.

- Build with / require automake 1.13.

- Build with libtool 2.4.2.418 alpha to support ppc64le.

Overview of changes leading to 0.9.24

Tuesday, November 13, 2013

=====================================

- Misc compiler warning fixes with clang.

- No functional changes.

Overview of changes leading to 0.9.23

Monday, October 28, 2013

=====================================

- "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013.

- Fix (Chain)Context recursion with non-monotone lookup positions.

- Misc Indic bug fixes.

- New Javanese / Buginese shaping, similar to Windows 8.1.

Overview of changes leading to 0.9.22

Thursday, October 3, 2013

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- Fix use-after-end-of-scope in hb_language_from_string().

- Fix hiding of default_ignorables if font doesn't have space glyph.

- Protect against out-of-range lookup indices.

- API Changes:

  * Added hb_ot_layout_table_get_lookup_count()

Overview of changes leading to 0.9.21

Monday, September 16, 2013

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- Rename gobject-introspection library name from harfbuzz to HarfBuzz.

- Remove (long disabled) hb-old and hb-icu-le test shapers.

- Misc gtk-doc and gobject-introspection annotations.

- Misc fixes.

- API changes:

  * Add HB_SET_VALUE_INVALID

Overview of changes leading to 0.9.20

Thursday, August 29, 2013

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General:

- Misc substitute_closure() fixes.

- Build fixes.

Documentation:

- gtk-doc boilerplate integrated.  Docs are built now, but

  contain no contents.  By next release hopefully we have

  some content in.  Enable using --enable-gtk-doc.

GObject and Introspection:

- Added harfbuzz-gobject library (hb-gobject.h) that has type

  bindings for all HarfBuzz objects and enums.  Enable using

  --with-gobject.

- Added gobject-introspection boilerplate.  Nothing useful

  right now.  Work in progress.  Gets enabled automatically if

  --with-gobject is used.  Override with --disable-introspection.

OpenType shaper:

- Apply 'mark' in Myanmar shaper.

- Don't apply 'dlig' by default.

Uniscribe shaper:

- Support user features.

- Fix loading of fonts that are also installed on the system.

- Fix shaping of Arabic Presentation Forms.

- Fix build with wide chars.

CoreText shaper:

- Support user features.

Source changes:

- hb_face_t code moved to hb-face.h / hb-face.cc.

- Added hb-deprecated.h.

API changes:

- Added HB_DISABLE_DEPRECATED.