433 lines
11 KiB
Plaintext
433 lines
11 KiB
Plaintext
Overview of changes leading to 0.9.4
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Tuesday, Sep 03, 2012
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====================================
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- Indic improvements with old-spec Malayalam.
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- Better fallback glyph positioning, specially with Thai / Lao marks.
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- Implement dotted-circle insertion.
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- Better Arabic fallback shaping / ligation.
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- Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name.
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- Misc fixes.
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Overview of changes leading to 0.9.3
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Friday, Aug 18, 2012
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====================================
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- Fixed fallback mark positioning for left-to-right text.
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- Improve mark positioning for the remaining combining classes.
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- Unbreak Thai and fallback Arabic shaping.
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- Port Arabic shaper to shape-plan caching.
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- Use new ICU normalizer functions.
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Overview of changes leading to 0.9.2
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Friday, Aug 10, 2012
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====================================
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- Over a thousand commits! This is the first major release of HarfBuzz.
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- HarfBuzz is feature-complete now! It should be in par, or better, than
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both Pango's shapers and old HarfBuzz / Qt shapers.
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- New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer.
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- Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic,
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Sinhala, N'ko, Mongolian, and Mandaic.
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- New Thai / Lao shaper.
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- Tibetan / Hangul support in the generic shaper.
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- Synthetic GDEF support for fonts without a GDEF table.
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- Fallback mark positioning for fonts without a GPOS table.
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- Unicode normalization shaping heuristic during glyph mapping.
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- New experimental Graphite2 backend.
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- New Uniscribe backend (primarily for testing).
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- New CoreText backend (primarily for testing).
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- Major optimization and speedup.
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- Test suites and testing infrastructure (work in progress).
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- Greatly improved hb-view cmdline tool.
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- hb-shape cmdline tool.
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- Unicode 6.1 support.
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Summary of API changes:
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o Changed API:
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- Users are expected to only include main header files now (ie. hb.h,
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hb-glib.h, hb-ft.h, ...)
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- All struct tag names had their initial underscore removed.
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Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now.
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- All set_user_data() functions now take a "replace" boolean parameter.
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- hb_buffer_create() takes zero arguments now.
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Use hb_buffer_pre_allocate() to pre-allocate.
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- hb_buffer_add_utf*() now accept -1 for length parameteres,
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meaning "nul-terminated".
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- hb_direction_t enum values changed.
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- All *_from_string() APIs now take a length parameter to allow for
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non-nul-terminated strings. A -1 length means "nul-terminated".
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- Typedef for hb_language_t changed.
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- hb_get_table_func_t renamed to hb_reference_table_func_t.
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- hb_ot_layout_table_choose_script()
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- Various renames in hb-unicode.h.
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o New API:
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- hb_buffer_guess_properties()
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Automatically called by hb_shape().
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- hb_buffer_normalize_glyphs()
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- hb_tag_from_string()
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- hb-coretext.h
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- hb-uniscribe.h
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- hb_face_reference_blob()
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- hb_face_[sg]et_index()
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- hb_face_set_upem()
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- hb_font_get_glyph_name_func_t
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hb_font_get_glyph_from_name_func_t
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hb_font_funcs_set_glyph_name_func()
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hb_font_funcs_set_glyph_from_name_func()
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hb_font_get_glyph_name()
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hb_font_get_glyph_from_name()
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hb_font_glyph_to_string()
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hb_font_glyph_from_string()
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- hb_font_set_funcs_data()
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- hb_ft_font_set_funcs()
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- hb_ft_font_get_face()
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- hb-gobject.h (work in progress)
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- hb_ot_shape_glyphs_closure()
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hb_ot_layout_substitute_closure_lookup()
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- hb-set.h
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- hb_shape_full()
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- hb_unicode_combining_class_t
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- hb_unicode_compose_func_t
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hb_unicode_decompose_func_t
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hb_unicode_decompose_compatibility_func_t
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hb_unicode_funcs_set_compose_func()
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hb_unicode_funcs_set_decompose_func()
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hb_unicode_funcs_set_decompose_compatibility_func()
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hb_unicode_compose()
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hb_unicode_decompose()
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hb_unicode_decompose_compatibility()
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o Removed API:
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- hb_ft_get_font_funcs()
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- hb_ot_layout_substitute_start()
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hb_ot_layout_substitute_lookup()
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hb_ot_layout_substitute_finish()
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hb_ot_layout_position_start()
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hb_ot_layout_position_lookup()
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hb_ot_layout_position_finish()
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Overview of changes leading to 0.6.0
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Friday, May 27, 2011
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====================================
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- Vertical text support in GPOS
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- Almost all API entries have unit tests now, under test/
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- All thread-safety issues are fixed
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Summary of API changes follows.
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* Simple Types API:
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o New API:
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HB_LANGUAGE_INVALID
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hb_language_get_default()
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hb_direction_to_string()
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hb_direction_from_string()
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hb_script_get_horizontal_direction()
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HB_UNTAG()
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o Renamed API:
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hb_category_t renamed to hb_unicode_general_category_t
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o Changed API:
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hb_language_t is a typed pointers now
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o Removed API:
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HB_TAG_STR()
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* Use ISO 15924 tags for hb_script_t:
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o New API:
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hb_script_from_iso15924_tag()
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hb_script_to_iso15924_tag()
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hb_script_from_string()
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o Changed API:
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HB_SCRIPT_* enum members changed value.
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* Buffer API streamlined:
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o New API:
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hb_buffer_reset()
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hb_buffer_set_length()
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hb_buffer_allocation_successful()
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o Renamed API:
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hb_buffer_ensure() renamed to hb_buffer_pre_allocate()
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hb_buffer_add_glyph() renamed to hb_buffer_add()
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o Removed API:
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hb_buffer_clear()
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hb_buffer_clear_positions()
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o Changed API:
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hb_buffer_get_glyph_infos() takes an out length parameter now
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hb_buffer_get_glyph_positions() takes an out length parameter now
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* Blob API streamlined:
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o New API:
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hb_blob_get_data()
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hb_blob_get_data_writable()
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o Renamed API:
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hb_blob_create_empty() renamed to hb_blob_get_empty()
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o Removed API:
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hb_blob_lock()
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hb_blob_unlock()
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hb_blob_is_writable()
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hb_blob_try_writable()
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o Changed API:
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hb_blob_create() takes user_data before destroy now
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* Unicode functions API:
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o Unicode function vectors can subclass other unicode function vectors now.
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Unimplemented callbacks in the subclass automatically chainup to the parent.
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o All hb_unicode_funcs_t callbacks take a user_data now. Their setters
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take a user_data and its respective destroy callback.
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o New API:
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hb_unicode_funcs_get_empty()
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hb_unicode_funcs_get_default()
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hb_unicode_funcs_get_parent()
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o Changed API:
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hb_unicode_funcs_create() now takes a parent_funcs.
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o Removed func getter functions:
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hb_unicode_funcs_get_mirroring_func()
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hb_unicode_funcs_get_general_category_func()
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hb_unicode_funcs_get_script_func()
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hb_unicode_funcs_get_combining_class_func()
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hb_unicode_funcs_get_eastasian_width_func()
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* Face API:
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o Renamed API:
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hb_face_get_table() renamed to hb_face_reference_table()
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hb_face_create_for_data() renamed to hb_face_create()
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o Changed API:
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hb_face_create_for_tables() takes user_data before destroy now
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hb_face_reference_table() returns empty blob instead of NULL
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hb_get_table_func_t accepts the face as first parameter now
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* Font API:
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o Fonts can subclass other fonts now. Unimplemented callbacks in the
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subclass automatically chainup to the parent. When chaining up,
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scale is adjusted if the parent font has a different scale.
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o All hb_font_funcs_t callbacks take a user_data now. Their setters
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take a user_data and its respective destroy callback.
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o New API:
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hb_font_get_parent()
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hb_font_funcs_get_empty()
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hb_font_create_sub_font()
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o Removed API:
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hb_font_funcs_copy()
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hb_font_unset_funcs()
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o Removed func getter functions:
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hb_font_funcs_get_glyph_func()
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hb_font_funcs_get_glyph_advance_func()
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hb_font_funcs_get_glyph_extents_func()
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hb_font_funcs_get_contour_point_func()
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hb_font_funcs_get_kerning_func()
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o Changed API:
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hb_font_create() takes a face and references it now
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hb_font_set_funcs() takes user_data before destroy now
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hb_font_set_scale() accepts signed integers now
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hb_font_get_contour_point_func_t now takes glyph first, then point_index
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hb_font_get_glyph_func_t returns a success boolean now
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* Changed object model:
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o All object types have a _get_empty() now:
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hb_blob_get_empty()
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hb_buffer_get_empty()
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hb_face_get_empty()
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hb_font_get_empty()
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hb_font_funcs_get_empty()
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hb_unicode_funcs_get_empty()
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o Added _set_user_data() and _get_user_data() for all object types:
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hb_blob_get_user_data()
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hb_blob_set_user_data()
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hb_buffer_get_user_data()
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hb_buffer_set_user_data()
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hb_face_get_user_data()
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hb_face_set_user_data()
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hb_font_funcs_get_user_data()
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hb_font_funcs_set_user_data()
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hb_font_get_user_data()
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hb_font_set_user_data()
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hb_unicode_funcs_get_user_data()
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hb_unicode_funcs_set_user_data()
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o Removed the _get_reference_count() from all object types:
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hb_blob_get_reference_count()
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hb_buffer_get_reference_count()
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hb_face_get_reference_count()
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hb_font_funcs_get_reference_count()
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hb_font_get_reference_count()
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hb_unicode_funcs_get_reference_count()
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o Added _make_immutable() and _is_immutable() for all object types except for buffer:
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hb_blob_make_immutable()
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hb_blob_is_immutable()
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hb_face_make_immutable()
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hb_face_is_immutable()
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* Changed API for vertical text support
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o The following callbacks where removed:
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hb_font_get_glyph_advance_func_t
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hb_font_get_kerning_func_t
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o The following new callbacks added instead:
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hb_font_get_glyph_h_advance_func_t
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hb_font_get_glyph_v_advance_func_t
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hb_font_get_glyph_h_origin_func_t
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hb_font_get_glyph_v_origin_func_t
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hb_font_get_glyph_h_kerning_func_t
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hb_font_get_glyph_v_kerning_func_t
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o The following API removed as such:
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hb_font_funcs_set_glyph_advance_func()
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hb_font_funcs_set_kerning_func()
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hb_font_get_glyph_advance()
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hb_font_get_kerning()
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o New API added instead:
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hb_font_funcs_set_glyph_h_advance_func()
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hb_font_funcs_set_glyph_v_advance_func()
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hb_font_funcs_set_glyph_h_origin_func()
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hb_font_funcs_set_glyph_v_origin_func()
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hb_font_funcs_set_glyph_h_kerning_func()
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hb_font_funcs_set_glyph_v_kerning_func()
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hb_font_get_glyph_h_advance()
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hb_font_get_glyph_v_advance()
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hb_font_get_glyph_h_origin()
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hb_font_get_glyph_v_origin()
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hb_font_get_glyph_h_kerning()
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hb_font_get_glyph_v_kerning()
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o The following higher-leve API added for convenience:
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hb_font_get_glyph_advance_for_direction()
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hb_font_get_glyph_origin_for_direction()
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hb_font_add_glyph_origin_for_direction()
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hb_font_subtract_glyph_origin_for_direction()
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hb_font_get_glyph_kerning_for_direction()
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hb_font_get_glyph_extents_for_origin()
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hb_font_get_glyph_contour_point_for_origin()
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* OpenType Layout API:
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o New API:
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hb_ot_layout_position_start()
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hb_ot_layout_substitute_start()
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hb_ot_layout_substitute_finish()
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* Glue code:
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o New API:
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hb_glib_script_to_script()
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hb_glib_script_from_script()
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hb_icu_script_to_script()
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hb_icu_script_from_script()
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* Version API added:
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o New API:
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HB_VERSION_MAJOR
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HB_VERSION_MINOR
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HB_VERSION_MICRO
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HB_VERSION_STRING
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HB_VERSION_CHECK()
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hb_version()
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hb_version_string()
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hb_version_check()
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