diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh deleted file mode 100644 index 0f0926f890..0000000000 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh +++ /dev/null @@ -1,635 +0,0 @@ -/* - * Copyright © 2007,2008,2009 Red Hat, Inc. - * Copyright © 2012,2013 Google, Inc. - * - * This is part of HarfBuzz, a text shaping library. - * - * Permission is hereby granted, without written agreement and without - * license or royalty fees, to use, copy, modify, and distribute this - * software and its documentation for any purpose, provided that the - * above copyright notice and the following two paragraphs appear in - * all copies of this software. - * - * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR - * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES - * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN - * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - * - * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, - * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS - * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO - * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. - * - * Red Hat Author(s): Behdad Esfahbod - * Google Author(s): Behdad Esfahbod - */ - -#ifndef HB_OT_LAYOUT_PRIVATE_HH -#define HB_OT_LAYOUT_PRIVATE_HH - -#include "hb-private.hh" - -#include "hb-font-private.hh" -#include "hb-buffer-private.hh" -#include "hb-set-digest-private.hh" -#include "hb-open-type-private.hh" - - -/* Private API corresponding to hb-ot-layout.h: */ - -HB_INTERNAL hb_bool_t -hb_ot_layout_table_find_feature (hb_face_t *face, - hb_tag_t table_tag, - hb_tag_t feature_tag, - unsigned int *feature_index); - - -/* - * GDEF - */ - -enum hb_ot_layout_glyph_props_flags_t -{ - /* The following three match LookupFlags::Ignore* numbers. */ - HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u, - HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u, - HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u, - - /* The following are used internally; not derived from GDEF. */ - HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u, - HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u, - HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u, - - HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED | - HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | - HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED -}; -HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t); - - -/* - * GSUB/GPOS - */ - -HB_INTERNAL hb_bool_t -hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face, - unsigned int lookup_index, - const hb_codepoint_t *glyphs, - unsigned int glyphs_length, - hb_bool_t zero_context); - - -/* Should be called before all the substitute_lookup's are done. */ -HB_INTERNAL void -hb_ot_layout_substitute_start (hb_font_t *font, - hb_buffer_t *buffer); - - -struct hb_ot_layout_lookup_accelerator_t; - -namespace OT { - struct hb_apply_context_t; - struct SubstLookup; -} - -HB_INTERNAL void -hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c, - const OT::SubstLookup &lookup, - const hb_ot_layout_lookup_accelerator_t &accel); - - -/* Should be called before all the position_lookup's are done. */ -HB_INTERNAL void -hb_ot_layout_position_start (hb_font_t *font, - hb_buffer_t *buffer); - -/* Should be called after all the position_lookup's are done, to finish advances. */ -HB_INTERNAL void -hb_ot_layout_position_finish_advances (hb_font_t *font, - hb_buffer_t *buffer); - -/* Should be called after hb_ot_layout_position_finish_advances, to finish offsets. */ -HB_INTERNAL void -hb_ot_layout_position_finish_offsets (hb_font_t *font, - hb_buffer_t *buffer); - - - -/* - * hb_ot_layout_t - */ - -namespace OT { - struct GDEF; - struct GSUB; - struct GPOS; - struct MATH; - struct fvar; - struct avar; -} - -struct hb_ot_layout_lookup_accelerator_t -{ - template <typename TLookup> - inline void init (const TLookup &lookup) - { - digest.init (); - lookup.add_coverage (&digest); - } - - inline void fini (void) - { - } - - inline bool may_have (hb_codepoint_t g) const { - return digest.may_have (g); - } - - private: - hb_set_digest_t digest; -}; - -struct hb_ot_layout_t -{ - hb_blob_t *gdef_blob; - hb_blob_t *gsub_blob; - hb_blob_t *gpos_blob; - - const struct OT::GDEF *gdef; - const struct OT::GSUB *gsub; - const struct OT::GPOS *gpos; - - /* TODO Move the following out of this struct. */ - OT::hb_lazy_table_loader_t<struct OT::MATH> math; - OT::hb_lazy_table_loader_t<struct OT::fvar> fvar; - OT::hb_lazy_table_loader_t<struct OT::avar> avar; - - unsigned int gsub_lookup_count; - unsigned int gpos_lookup_count; - - hb_ot_layout_lookup_accelerator_t *gsub_accels; - hb_ot_layout_lookup_accelerator_t *gpos_accels; -}; - - -HB_INTERNAL hb_ot_layout_t * -_hb_ot_layout_create (hb_face_t *face); - -HB_INTERNAL void -_hb_ot_layout_destroy (hb_ot_layout_t *layout); - - -#define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot) - - -/* - * Buffer var routines. - */ - -/* buffer var allocations, used during the entire shaping process */ -#define unicode_props() var2.u16[0] - -/* buffer var allocations, used during the GSUB/GPOS processing */ -#define glyph_props() var1.u16[0] /* GDEF glyph properties */ -#define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */ -#define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */ - - -/* Loop over syllables. Based on foreach_cluster(). */ -#define foreach_syllable(buffer, start, end) \ - for (unsigned int \ - _count = buffer->len, \ - start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \ - start < _count; \ - start = end, end = _next_syllable (buffer, start)) - -static inline unsigned int -_next_syllable (hb_buffer_t *buffer, unsigned int start) -{ - hb_glyph_info_t *info = buffer->info; - unsigned int count = buffer->len; - - unsigned int syllable = info[start].syllable(); - while (++start < count && syllable == info[start].syllable()) - ; - - return start; -} - - -/* unicode_props */ - -/* Design: - * unicode_props() is a two-byte number. The low byte includes: - * - General_Category: 5 bits. - * - A bit each for: - * * Is it Default_Ignorable(); we have a modified Default_Ignorable(). - * * Whether it's one of the three Mongolian Free Variation Selectors, - * CGJ, or other characters that are hidden but should not be ignored - * like most other Default_Ignorable()s do during matching. - * * One free bit right now. - * - * The high-byte has different meanings, switched by the Gen-Cat: - * - For Mn,Mc,Me: the modified Combining_Class. - * - For Cf: whether it's ZWJ, ZWNJ, or something else. - * - For Ws: index of which space character this is, if space fallback - * is needed, ie. we don't set this by default, only if asked to. - */ - -enum hb_unicode_props_flags_t { - UPROPS_MASK_GEN_CAT = 0x001Fu, - UPROPS_MASK_IGNORABLE = 0x0020u, - UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, - * or TAG characters */ - - /* If GEN_CAT=FORMAT, top byte masks: */ - UPROPS_MASK_Cf_ZWJ = 0x0100u, - UPROPS_MASK_Cf_ZWNJ = 0x0200u -}; -HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t); - -static inline void -_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer) -{ - hb_unicode_funcs_t *unicode = buffer->unicode; - unsigned int u = info->codepoint; - unsigned int gen_cat = (unsigned int) unicode->general_category (u); - unsigned int props = gen_cat; - - if (u >= 0x80) - { - buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII; - if (unlikely (unicode->is_default_ignorable (u))) - { - buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES; - props |= UPROPS_MASK_IGNORABLE; - if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ; - else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ; - /* Mongolian Free Variation Selectors need to be remembered - * because although we need to hide them like default-ignorables, - * they need to non-ignorable during shaping. This is similar to - * what we do for joiners in Indic-like shapers, but since the - * FVSes are GC=Mn, we have use a separate bit to remember them. - * Fixes: - * https://github.com/harfbuzz/harfbuzz/issues/234 */ - else if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN; - /* TAG characters need similar treatment. Fixes: - * https://github.com/harfbuzz/harfbuzz/issues/463 */ - else if (unlikely (hb_in_range (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN; - /* COMBINING GRAPHEME JOINER should not be skipped; at least some times. - * https://github.com/harfbuzz/harfbuzz/issues/554 */ - else if (unlikely (u == 0x034Fu)) props |= UPROPS_MASK_HIDDEN; - } - else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat))) - { - /* The above check is just an optimization to let in only things we need further - * processing on. */ - - /* Only Mn and Mc can have non-zero ccc: - * http://www.unicode.org/policies/stability_policy.html#Property_Value - * """ - * Canonical_Combining_Class, General_Category - * All characters other than those with General_Category property values - * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class - * property value 0. - * 1.1.5+ - * """ - * - * Also, all Mn's that are Default_Ignorable, have ccc=0, hence - * the "else if". - */ - props |= unicode->modified_combining_class (info->codepoint)<<8; - - /* Recategorize emoji skin-tone modifiers as Unicode mark, so they - * behave correctly in non-native directionality. They originally - * are MODIFIER_SYMBOL. Fixes: - * https://github.com/harfbuzz/harfbuzz/issues/169 - */ - if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu))) - { - props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK; - } - } - } - - info->unicode_props() = props; -} - -static inline void -_hb_glyph_info_set_general_category (hb_glyph_info_t *info, - hb_unicode_general_category_t gen_cat) -{ - /* Clears top-byte. */ - info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT)); -} - -static inline hb_unicode_general_category_t -_hb_glyph_info_get_general_category (const hb_glyph_info_t *info) -{ - return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT); -} - -static inline bool -_hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info) -{ - return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT); -} -static inline void -_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, - unsigned int modified_class) -{ - if (unlikely (!_hb_glyph_info_is_unicode_mark (info))) - return; - info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF); -} -static inline unsigned int -_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0; -} - -#define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info))) - -static inline bool -_hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_get_general_category (info) == - HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR; -} -static inline void -_hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s) -{ - if (unlikely (!_hb_glyph_info_is_unicode_space (info))) - return; - info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF); -} -static inline hb_unicode_funcs_t::space_t -_hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_is_unicode_space (info) ? - (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) : - hb_unicode_funcs_t::NOT_SPACE; -} - -static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info); - -static inline hb_bool_t -_hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) -{ - return (info->unicode_props() & UPROPS_MASK_IGNORABLE) && - !_hb_glyph_info_ligated (info); -} -static inline hb_bool_t -_hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info) -{ - return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN)) - == UPROPS_MASK_IGNORABLE) && - !_hb_glyph_info_ligated (info); -} - -static inline bool -_hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_get_general_category (info) == - HB_UNICODE_GENERAL_CATEGORY_FORMAT; -} -static inline hb_bool_t -_hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ); -} -static inline hb_bool_t -_hb_glyph_info_is_zwj (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ); -} -static inline hb_bool_t -_hb_glyph_info_is_joiner (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ)); -} -static inline void -_hb_glyph_info_flip_joiners (hb_glyph_info_t *info) -{ - if (!_hb_glyph_info_is_unicode_format (info)) - return; - info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ; -} - -/* lig_props: aka lig_id / lig_comp - * - * When a ligature is formed: - * - * - The ligature glyph and any marks in between all the same newly allocated - * lig_id, - * - The ligature glyph will get lig_num_comps set to the number of components - * - The marks get lig_comp > 0, reflecting which component of the ligature - * they were applied to. - * - This is used in GPOS to attach marks to the right component of a ligature - * in MarkLigPos, - * - Note that when marks are ligated together, much of the above is skipped - * and the current lig_id reused. - * - * When a multiple-substitution is done: - * - * - All resulting glyphs will have lig_id = 0, - * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively. - * - This is used in GPOS to attach marks to the first component of a - * multiple substitution in MarkBasePos. - * - * The numbers are also used in GPOS to do mark-to-mark positioning only - * to marks that belong to the same component of the same ligature. - */ - -static inline void -_hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) -{ - info->lig_props() = 0; -} - -#define IS_LIG_BASE 0x10 - -static inline void -_hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, - unsigned int lig_id, - unsigned int lig_num_comps) -{ - info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); -} - -static inline void -_hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, - unsigned int lig_id, - unsigned int lig_comp) -{ - info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); -} - -static inline void -_hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) -{ - _hb_glyph_info_set_lig_props_for_mark (info, 0, comp); -} - -static inline unsigned int -_hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) -{ - return info->lig_props() >> 5; -} - -static inline bool -_hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) -{ - return !!(info->lig_props() & IS_LIG_BASE); -} - -static inline unsigned int -_hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) -{ - if (_hb_glyph_info_ligated_internal (info)) - return 0; - else - return info->lig_props() & 0x0F; -} - -static inline unsigned int -_hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) -{ - if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && - _hb_glyph_info_ligated_internal (info)) - return info->lig_props() & 0x0F; - else - return 1; -} - -static inline uint8_t -_hb_allocate_lig_id (hb_buffer_t *buffer) { - uint8_t lig_id = buffer->next_serial () & 0x07; - if (unlikely (!lig_id)) - lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ - return lig_id; -} - -/* glyph_props: */ - -static inline void -_hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) -{ - info->glyph_props() = props; -} - -static inline unsigned int -_hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) -{ - return info->glyph_props(); -} - -static inline bool -_hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); -} - -static inline bool -_hb_glyph_info_is_ligature (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE); -} - -static inline bool -_hb_glyph_info_is_mark (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK); -} - -static inline bool -_hb_glyph_info_substituted (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); -} - -static inline bool -_hb_glyph_info_ligated (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED); -} - -static inline bool -_hb_glyph_info_multiplied (const hb_glyph_info_t *info) -{ - return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); -} - -static inline bool -_hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info) -{ - return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info); -} - -static inline void -_hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info) -{ - info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | - HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); -} - -static inline void -_hb_glyph_info_clear_substituted (hb_glyph_info_t *info) -{ - info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); -} - - -/* Allocation / deallocation. */ - -static inline void -_hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props); -} - -static inline void -_hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props); -} - -static inline void -_hb_buffer_assert_unicode_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_ASSERT_VAR (buffer, unicode_props); -} - -static inline void -_hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); - HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); - HB_BUFFER_ALLOCATE_VAR (buffer, syllable); -} - -static inline void -_hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_DEALLOCATE_VAR (buffer, syllable); - HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props); - HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props); -} - -static inline void -_hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer) -{ - HB_BUFFER_ASSERT_VAR (buffer, glyph_props); - HB_BUFFER_ASSERT_VAR (buffer, lig_props); - HB_BUFFER_ASSERT_VAR (buffer, syllable); -} - -/* Make sure no one directly touches our props... */ -#undef unicode_props0 -#undef unicode_props1 -#undef lig_props -#undef glyph_props - -#endif /* HB_OT_LAYOUT_PRIVATE_HH */ |