From 4189b92aaa41e4a1756c561cc6e08b0ed024afda Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Tue, 26 May 2009 17:31:56 -0400 Subject: [PATCH] [HB] When looking back/forward, skip marks only --- src/TODO | 1 - src/hb-ot-layout-gpos-private.h | 13 ++----- src/hb-ot-layout-gsub-private.h | 38 +++++++++----------- src/hb-ot-layout-gsubgpos-private.h | 14 ++++---- src/hb-ot-layout-private.h | 6 ++++ src/hb-ot-layout.cc | 69 ++++++++++++++++++++++++------------- 6 files changed, 76 insertions(+), 65 deletions(-) diff --git a/src/TODO b/src/TODO index df0bbd9..d9f65a2 100644 --- a/src/TODO +++ b/src/TODO @@ -5,7 +5,6 @@ - Face index > 0 and dfont fonts - HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH vs LookupType::... mess - Rename LookupFlag::MarkAttachmentType to LookupFlag:IgnoreSpecialMarks -- Skip forward/backward should only skip marks, not whatever lookupflags say! - layout vs font split - gpi again diff --git a/src/hb-ot-layout-gpos-private.h b/src/hb-ot-layout-gpos-private.h index c088456..e115cd4 100644 --- a/src/hb-ot-layout-gpos-private.h +++ b/src/hb-ot-layout-gpos-private.h @@ -379,7 +379,7 @@ struct PairPosFormat1 return false; unsigned int j = buffer->in_pos + 1; - while (!_hb_ot_layout_check_glyph_property (layout, IN_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, IN_INFO (j), lookup_flag, NULL)) { if (HB_UNLIKELY (j == end)) return false; @@ -444,7 +444,7 @@ struct PairPosFormat2 return false; unsigned int j = buffer->in_pos + 1; - while (!_hb_ot_layout_check_glyph_property (layout, IN_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, IN_INFO (j), lookup_flag, NULL)) { if (HB_UNLIKELY (j == end)) return false; @@ -771,9 +771,6 @@ struct MarkBasePosFormat1 private: inline bool apply (APPLY_ARG_DEF) const { - if (lookup_flag & LookupFlag::IgnoreBaseGlyphs) - return false; - unsigned int mark_index = (this+markCoverage) (IN_CURGLYPH ()); if (HB_LIKELY (mark_index == NOT_COVERED)) return false; @@ -896,9 +893,6 @@ struct MarkLigPosFormat1 private: inline bool apply (APPLY_ARG_DEF) const { - if (lookup_flag & LookupFlag::IgnoreLigatures) - return false; - unsigned int mark_index = (this+markCoverage) (IN_CURGLYPH ()); if (HB_LIKELY (mark_index == NOT_COVERED)) return false; @@ -1034,9 +1028,6 @@ struct MarkMarkPosFormat1 private: inline bool apply (APPLY_ARG_DEF) const { - if (lookup_flag & LookupFlag::IgnoreMarks) - return false; - unsigned int mark1_index = (this+mark1Coverage) (IN_CURGLYPH ()); if (HB_LIKELY (mark1_index == NOT_COVERED)) return false; diff --git a/src/hb-ot-layout-gsub-private.h b/src/hb-ot-layout-gsub-private.h index 69d5465..14f69e4 100644 --- a/src/hb-ot-layout-gsub-private.h +++ b/src/hb-ot-layout-gsub-private.h @@ -45,11 +45,9 @@ struct SingleSubstFormat1 glyph_id += deltaGlyphID; _hb_buffer_replace_glyph (buffer, glyph_id); - if ( _hb_ot_layout_has_new_glyph_classes (layout) ) - { - /* we inherit the old glyph class to the substituted glyph */ + /* We inherit the old glyph class to the substituted glyph */ + if (_hb_ot_layout_has_new_glyph_classes (layout)) _hb_ot_layout_set_glyph_property (layout, glyph_id, property); - } return true; } @@ -82,11 +80,9 @@ struct SingleSubstFormat2 glyph_id = substitute[index]; _hb_buffer_replace_glyph (buffer, glyph_id); - if ( _hb_ot_layout_has_new_glyph_classes (layout) ) - { - /* we inherit the old glyph class to the substituted glyph */ + /* We inherit the old glyph class to the substituted glyph */ + if (_hb_ot_layout_has_new_glyph_classes (layout)) _hb_ot_layout_set_glyph_property (layout, glyph_id, property); - } return true; } @@ -140,10 +136,10 @@ struct Sequence substitute.len, (const uint16_t *) substitute.array, 0xFFFF, 0xFFFF); - if ( _hb_ot_layout_has_new_glyph_classes (layout) ) + /* This is a guess only ... */ + if (_hb_ot_layout_has_new_glyph_classes (layout)) { - /* this is a guess only ... */ - if ( property == HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE ) + if (property == HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE) property = HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH; unsigned int count = substitute.len; @@ -246,11 +242,9 @@ struct AlternateSubstFormat1 _hb_buffer_replace_glyph (buffer, glyph_id); - if ( _hb_ot_layout_has_new_glyph_classes (layout) ) - { - /* we inherit the old glyph class to the substituted glyph */ + /* We inherit the old glyph class to the substituted glyph */ + if (_hb_ot_layout_has_new_glyph_classes (layout)) _hb_ot_layout_set_glyph_property (layout, glyph_id, property); - } return true; } @@ -303,7 +297,7 @@ struct Ligature for (i = 1, j = buffer->in_pos + 1; i < count; i++, j++) { - while (!_hb_ot_layout_check_glyph_property (layout, IN_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, IN_INFO (j), lookup_flag, &property)) { if (HB_UNLIKELY (j + count - i == end)) return false; @@ -313,11 +307,11 @@ struct Ligature if (!(property & HB_OT_LAYOUT_GLYPH_CLASS_MARK)) is_mark = FALSE; - if (HB_LIKELY (IN_GLYPH(j) != component[i])) + if (HB_LIKELY (IN_GLYPH (j) != component[i])) return false; } - if ( _hb_ot_layout_has_new_glyph_classes (layout) ) - /* this is just a guess ... */ + /* This is just a guess ... */ + if (_hb_ot_layout_has_new_glyph_classes (layout)) hb_ot_layout_set_glyph_class (layout, ligGlyph, is_mark ? HB_OT_LAYOUT_GLYPH_CLASS_MARK : HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE); @@ -344,8 +338,8 @@ struct Ligature for ( i = 1; i < count; i++ ) { - while (!_hb_ot_layout_check_glyph_property (layout, IN_CURINFO(), lookup_flag, &property)) - _hb_buffer_add_output_glyph (buffer, IN_CURGLYPH(), i - 1, lig_id); + while (_hb_ot_layout_skip_mark (layout, IN_CURINFO (), lookup_flag, NULL)) + _hb_buffer_add_output_glyph (buffer, IN_CURGLYPH (), i - 1, lig_id); (buffer->in_pos)++; } @@ -505,7 +499,7 @@ struct ReverseChainSingleSubstFormat1 match_coverage, (char *) this, 1)) { - IN_CURGLYPH() = substitute[index]; + IN_CURGLYPH () = substitute[index]; buffer->in_pos--; /* Reverse! */ return true; } diff --git a/src/hb-ot-layout-gsubgpos-private.h b/src/hb-ot-layout-gsubgpos-private.h index 9e8706e..3490799 100644 --- a/src/hb-ot-layout-gsubgpos-private.h +++ b/src/hb-ot-layout-gsubgpos-private.h @@ -89,14 +89,14 @@ static inline bool match_input (APPLY_ARG_DEF, for (i = 1, j = buffer->in_pos + 1; i < count; i++, j++) { - while (!_hb_ot_layout_check_glyph_property (layout, IN_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, IN_INFO (j), lookup_flag, NULL)) { if (HB_UNLIKELY (j + count - i == end)) return false; j++; } - if (HB_LIKELY (!match_func (IN_GLYPH(j), input[i - 1], match_data))) + if (HB_LIKELY (!match_func (IN_GLYPH (j), input[i - 1], match_data))) return false; } @@ -116,14 +116,14 @@ static inline bool match_backtrack (APPLY_ARG_DEF, for (unsigned int i = 0, j = buffer->out_pos - 1; i < count; i++, j--) { - while (!_hb_ot_layout_check_glyph_property (layout, OUT_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, OUT_INFO (j), lookup_flag, NULL)) { if (HB_UNLIKELY (j + 1 == count - i)) return false; j--; } - if (HB_LIKELY (!match_func (OUT_GLYPH(j), backtrack[i], match_data))) + if (HB_LIKELY (!match_func (OUT_GLYPH (j), backtrack[i], match_data))) return false; } @@ -144,14 +144,14 @@ static inline bool match_lookahead (APPLY_ARG_DEF, for (i = 0, j = buffer->in_pos + offset; i < count; i++, j++) { - while (!_hb_ot_layout_check_glyph_property (layout, OUT_INFO (j), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, OUT_INFO (j), lookup_flag, NULL)) { if (HB_UNLIKELY (j + count - i == end)) return false; j++; } - if (HB_LIKELY (!match_func (IN_GLYPH(j), lookahead[i], match_data))) + if (HB_LIKELY (!match_func (IN_GLYPH (j), lookahead[i], match_data))) return false; } @@ -182,7 +182,7 @@ static inline bool apply_lookup (APPLY_ARG_DEF, * Should be easy for in_place ones at least. */ for (unsigned int i = 0; i < count; i++) { - while (!_hb_ot_layout_check_glyph_property (layout, IN_CURINFO (), lookup_flag, &property)) + while (_hb_ot_layout_skip_mark (layout, IN_CURINFO (), lookup_flag, NULL)) { if (HB_UNLIKELY (buffer->in_pos == end)) return true; diff --git a/src/hb-ot-layout-private.h b/src/hb-ot-layout-private.h index 42c2688..121ecb2 100644 --- a/src/hb-ot-layout-private.h +++ b/src/hb-ot-layout-private.h @@ -88,6 +88,12 @@ _hb_ot_layout_check_glyph_property (hb_ot_layout_t *layout, unsigned int lookup_flags, unsigned int *property); +HB_INTERNAL hb_bool_t +_hb_ot_layout_skip_mark (hb_ot_layout_t *layout, + hb_glyph_info_t *ginfo, + unsigned int lookup_flags, + unsigned int *property); + HB_END_DECLS #endif /* HB_OT_LAYOUT_PRIVATE_H */ diff --git a/src/hb-ot-layout.cc b/src/hb-ot-layout.cc index 111d054..25d1dce 100644 --- a/src/hb-ot-layout.cc +++ b/src/hb-ot-layout.cc @@ -161,37 +161,26 @@ HB_INTERNAL hb_bool_t _hb_ot_layout_check_glyph_property (hb_ot_layout_t *layout, hb_glyph_info_t *ginfo, unsigned int lookup_flags, - unsigned int *property) + unsigned int *property_out) { - hb_ot_layout_glyph_class_t glyph_class; - unsigned int desired_attachment_class; + unsigned int property; if (ginfo->gproperty == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN) - { - ginfo->gproperty = *property = _hb_ot_layout_get_glyph_property (layout, ginfo->gindex); - if (ginfo->gproperty == HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED) - return false; - } - - *property = ginfo->gproperty; - - /* If the glyph was found in the MarkAttachmentClass table, - * then that class value is stored in the high byte of the result. - * The low byte contains the basic type of the glyph as defined by - * the GlyphClassDef table. - */ - glyph_class = (hb_ot_layout_glyph_class_t) *property; + ginfo->gproperty = _hb_ot_layout_get_glyph_property (layout, ginfo->gindex); + property = ginfo->gproperty; + if (property_out) + *property_out = property; - /* Not covered, if, for example, glyph_class is HB_GDEF_LIGATURE and + /* Not covered, if, for example, glyph class is ligature and * lookup_flags includes LookupFlags::IgnoreLigatures */ - if (lookup_flags & glyph_class) + if (property & lookup_flags) return false; - if (glyph_class & HB_OT_LAYOUT_GLYPH_CLASS_MARK) + if (property & HB_OT_LAYOUT_GLYPH_CLASS_MARK) { /* If using mark filtering sets, the high short of - * lookup_flags hsa the set index. + * lookup_flags has the set index. */ if (lookup_flags & LookupFlag::UseMarkFilteringSet) return layout->gdef->mark_set_covers (lookup_flags >> 16, ginfo->gindex); @@ -200,14 +189,46 @@ _hb_ot_layout_check_glyph_property (hb_ot_layout_t *layout, * "ignore marks of attachment type different than * the attachment type specified." */ - if (lookup_flags & LookupFlag::MarkAttachmentType && *property & LookupFlag::MarkAttachmentType) - return (lookup_flags & LookupFlag::MarkAttachmentType) == (*property & LookupFlag::MarkAttachmentType); + if (lookup_flags & LookupFlag::MarkAttachmentType && property & LookupFlag::MarkAttachmentType) + return (lookup_flags & LookupFlag::MarkAttachmentType) == (property & LookupFlag::MarkAttachmentType); } - return true; } +HB_INTERNAL hb_bool_t +_hb_ot_layout_skip_mark (hb_ot_layout_t *layout, + hb_glyph_info_t *ginfo, + unsigned int lookup_flags, + unsigned int *property_out) +{ + unsigned int property; + + if (ginfo->gproperty == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN) + ginfo->gproperty = _hb_ot_layout_get_glyph_property (layout, ginfo->gindex); + property = ginfo->gproperty; + if (property_out) + *property_out = property; + + if (property & HB_OT_LAYOUT_GLYPH_CLASS_MARK) + { + /* Skip mark if lookup_flags includes LookupFlags::IgnoreMarks */ + if (lookup_flags & LookupFlag::IgnoreMarks) + return true; + + /* If using mark filtering sets, the high short of lookup_flags has the set index. */ + if (lookup_flags & LookupFlag::UseMarkFilteringSet) + return !layout->gdef->mark_set_covers (lookup_flags >> 16, ginfo->gindex); + + /* The second byte of lookup_flags has the meaning "ignore marks of attachment type + * different than the attachment type specified." */ + if (lookup_flags & LookupFlag::MarkAttachmentType && property & LookupFlag::MarkAttachmentType) + return (lookup_flags & LookupFlag::MarkAttachmentType) != (property & LookupFlag::MarkAttachmentType); + } + + return false; +} + HB_INTERNAL void _hb_ot_layout_set_glyph_property (hb_ot_layout_t *layout, hb_codepoint_t glyph, -- 2.7.4