diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh | 121 |
1 files changed, 96 insertions, 25 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh index 36e5a358e6..b87ac8f494 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh @@ -79,28 +79,44 @@ struct KernSubTableFormat3 { TRACE_SANITIZE (this); return_trace (c->check_struct (this) && + hb_barrier () && c->check_range (kernValueZ, kernValueCount * sizeof (FWORD) + glyphCount * 2 + leftClassCount * rightClassCount)); } + template <typename set_t> + void collect_glyphs (set_t &left_set, set_t &right_set, unsigned num_glyphs) const + { + set_t set; + if (likely (glyphCount)) + set.add_range (0, glyphCount - 1); + left_set.union_ (set); + right_set.union_ (set); + } + protected: - KernSubTableHeader header; - HBUINT16 glyphCount; /* The number of glyphs in this font. */ - HBUINT8 kernValueCount; /* The number of kerning values. */ - HBUINT8 leftClassCount; /* The number of left-hand classes. */ - HBUINT8 rightClassCount;/* The number of right-hand classes. */ - HBUINT8 flags; /* Set to zero (reserved for future use). */ - UnsizedArrayOf<FWORD> kernValueZ; /* The kerning values. - * Length kernValueCount. */ + KernSubTableHeader + header; + HBUINT16 glyphCount; /* The number of glyphs in this font. */ + HBUINT8 kernValueCount; /* The number of kerning values. */ + HBUINT8 leftClassCount; /* The number of left-hand classes. */ + HBUINT8 rightClassCount;/* The number of right-hand classes. */ + HBUINT8 flags; /* Set to zero (reserved for future use). */ + UnsizedArrayOf<FWORD> + kernValueZ; /* The kerning values. + * Length kernValueCount. */ #if 0 - UnsizedArrayOf<HBUINT8>leftClass; /* The left-hand classes. - * Length glyphCount. */ - UnsizedArrayOf<HBUINT8>rightClass; /* The right-hand classes. - * Length glyphCount. */ - UnsizedArrayOf<HBUINT8>kernIndex; /* The indices into the kernValue array. - * Length leftClassCount * rightClassCount */ + UnsizedArrayOf<HBUINT8> + leftClass; /* The left-hand classes. + * Length glyphCount. */ + UnsizedArrayOf<HBUINT8> + rightClass; /* The right-hand classes. + * Length glyphCount. */ + UnsizedArrayOf<HBUINT8>kernIndex; + /* The indices into the kernValue array. + * Length leftClassCount * rightClassCount */ #endif public: DEFINE_SIZE_ARRAY (KernSubTableHeader::static_size + 6, kernValueZ); @@ -129,22 +145,36 @@ struct KernSubTable switch (subtable_type) { case 0: return_trace (c->dispatch (u.format0)); #ifndef HB_NO_AAT_SHAPE - case 1: return_trace (u.header.apple ? c->dispatch (u.format1, hb_forward<Ts> (ds)...) : c->default_return_value ()); + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); #endif case 2: return_trace (c->dispatch (u.format2)); #ifndef HB_NO_AAT_SHAPE - case 3: return_trace (u.header.apple ? c->dispatch (u.format3, hb_forward<Ts> (ds)...) : c->default_return_value ()); + case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); #endif default: return_trace (c->default_return_value ()); } } + template <typename set_t> + void collect_glyphs (set_t &left_set, set_t &right_set, unsigned num_glyphs) const + { + unsigned int subtable_type = get_type (); + switch (subtable_type) { + case 0: u.format0.collect_glyphs (left_set, right_set, num_glyphs); return; + case 1: u.format1.collect_glyphs (left_set, right_set, num_glyphs); return; + case 2: u.format2.collect_glyphs (left_set, right_set, num_glyphs); return; + case 3: u.format3.collect_glyphs (left_set, right_set, num_glyphs); return; + default: return; + } + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); - if (unlikely (!u.header.sanitize (c) || - u.header.length < u.header.min_size || - !c->check_range (this, u.header.length))) return_trace (false); + if (unlikely (!(u.header.sanitize (c) && + hb_barrier () && + u.header.length >= u.header.min_size && + c->check_range (this, u.header.length)))) return_trace (false); return_trace (dispatch (c)); } @@ -246,8 +276,8 @@ struct KernAATSubTableHeader HBUINT8 coverage; /* Coverage bits. */ HBUINT8 format; /* Subtable format. */ HBUINT16 tupleIndex; /* The tuple index (used for variations fonts). - * This value specifies which tuple this subtable covers. - * Note: We don't implement. */ + * This value specifies which tuple this subtable covers. + * Note: We don't implement. */ public: DEFINE_SIZE_STATIC (8); }; @@ -311,8 +341,9 @@ struct kern } } - bool apply (AAT::hb_aat_apply_context_t *c) const - { return dispatch (c); } + bool apply (AAT::hb_aat_apply_context_t *c, + const AAT::kern_accelerator_data_t *accel_data = nullptr) const + { return dispatch (c, accel_data); } template <typename context_t, typename ...Ts> typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const @@ -320,9 +351,9 @@ struct kern unsigned int subtable_type = get_type (); TRACE_DISPATCH (this, subtable_type); switch (subtable_type) { - case 0: return_trace (c->dispatch (u.ot, hb_forward<Ts> (ds)...)); + case 0: return_trace (c->dispatch (u.ot, std::forward<Ts> (ds)...)); #ifndef HB_NO_AAT_SHAPE - case 1: return_trace (c->dispatch (u.aat, hb_forward<Ts> (ds)...)); + case 1: return_trace (c->dispatch (u.aat, std::forward<Ts> (ds)...)); #endif default: return_trace (c->default_return_value ()); } @@ -332,9 +363,45 @@ struct kern { TRACE_SANITIZE (this); if (!u.version32.sanitize (c)) return_trace (false); + hb_barrier (); return_trace (dispatch (c)); } + AAT::kern_accelerator_data_t create_accelerator_data (unsigned num_glyphs) const + { + switch (get_type ()) { + case 0: return u.ot.create_accelerator_data (num_glyphs); +#ifndef HB_NO_AAT_SHAPE + case 1: return u.aat.create_accelerator_data (num_glyphs); +#endif + default:return AAT::kern_accelerator_data_t (); + } + } + + struct accelerator_t + { + accelerator_t (hb_face_t *face) + { + hb_sanitize_context_t sc; + this->table = sc.reference_table<kern> (face); + this->accel_data = this->table->create_accelerator_data (face->get_num_glyphs ()); + } + ~accelerator_t () + { + this->table.destroy (); + } + + hb_blob_t *get_blob () const { return table.get_blob (); } + + bool apply (AAT::hb_aat_apply_context_t *c) const + { + return table->apply (c, &accel_data); + } + + hb_blob_ptr_t<kern> table; + AAT::kern_accelerator_data_t accel_data; + }; + protected: union { HBUINT32 version32; @@ -348,6 +415,10 @@ struct kern DEFINE_SIZE_UNION (4, version32); }; +struct kern_accelerator_t : kern::accelerator_t { + kern_accelerator_t (hb_face_t *face) : kern::accelerator_t (face) {} +}; + } /* namespace OT */ |