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 | 80 |
1 files changed, 73 insertions, 7 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 ffa11bc249..b87ac8f494 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-kern-table.hh @@ -79,12 +79,23 @@ 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; @@ -134,22 +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, std::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, std::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)); } @@ -316,8 +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 @@ -337,9 +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; @@ -353,6 +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 */ |