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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-cff-common.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-cff-common.hh | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-cff-common.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-cff-common.hh new file mode 100644 index 0000000000..c7c3264c08 --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-cff-common.hh @@ -0,0 +1,615 @@ +/* + * Copyright © 2018 Adobe 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. + * + * Adobe Author(s): Michiharu Ariza + */ +#ifndef HB_OT_CFF_COMMON_HH +#define HB_OT_CFF_COMMON_HH + +#include "hb-open-type.hh" +#include "hb-bimap.hh" +#include "hb-ot-layout-common.hh" +#include "hb-cff-interp-dict-common.hh" +#include "hb-subset-plan.hh" + +namespace CFF { + +using namespace OT; + +#define CFF_UNDEF_CODE 0xFFFFFFFF + +using objidx_t = hb_serialize_context_t::objidx_t; +using whence_t = hb_serialize_context_t::whence_t; + +/* CFF offsets can technically be negative */ +template<typename Type, typename ...Ts> +static inline const Type& StructAtOffsetOrNull (const void *P, int offset, hb_sanitize_context_t &sc, Ts&&... ds) +{ + if (!offset) return Null (Type); + + const char *p = (const char *) P + offset; + if (!sc.check_point (p)) return Null (Type); + + const Type &obj = *reinterpret_cast<const Type *> (p); + if (!obj.sanitize (&sc, std::forward<Ts> (ds)...)) return Null (Type); + + return obj; +} + + +struct code_pair_t +{ + unsigned code; + hb_codepoint_t glyph; +}; + + +using str_buff_t = hb_vector_t<unsigned char>; +using str_buff_vec_t = hb_vector_t<str_buff_t>; +using glyph_to_sid_map_t = hb_vector_t<code_pair_t>; + +struct length_f_t +{ + template <typename Iterable, + hb_requires (hb_is_iterable (Iterable))> + unsigned operator () (const Iterable &_) const { return hb_len (hb_iter (_)); } + + unsigned operator () (unsigned _) const { return _; } +} +HB_FUNCOBJ (length_f); + +/* CFF INDEX */ +template <typename COUNT> +struct CFFIndex +{ + unsigned int offset_array_size () const + { return offSize * (count + 1); } + + template <typename Iterable, + hb_requires (hb_is_iterable (Iterable))> + bool serialize (hb_serialize_context_t *c, + const Iterable &iterable, + const unsigned *p_data_size = nullptr, + unsigned min_off_size = 0) + { + TRACE_SERIALIZE (this); + unsigned data_size; + if (p_data_size) + data_size = *p_data_size; + else + total_size (iterable, &data_size); + + auto it = hb_iter (iterable); + if (unlikely (!serialize_header (c, +it, data_size, min_off_size))) return_trace (false); + unsigned char *ret = c->allocate_size<unsigned char> (data_size, false); + if (unlikely (!ret)) return_trace (false); + for (const auto &_ : +it) + { + unsigned len = _.length; + if (!len) + continue; + if (len <= 1) + { + *ret++ = *_.arrayZ; + continue; + } + hb_memcpy (ret, _.arrayZ, len); + ret += len; + } + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool serialize_header (hb_serialize_context_t *c, + Iterator it, + unsigned data_size, + unsigned min_off_size = 0) + { + TRACE_SERIALIZE (this); + + unsigned off_size = (hb_bit_storage (data_size + 1) + 7) / 8; + off_size = hb_max(min_off_size, off_size); + + /* serialize CFFIndex header */ + if (unlikely (!c->extend_min (this))) return_trace (false); + this->count = hb_len (it); + if (!this->count) return_trace (true); + if (unlikely (!c->extend (this->offSize))) return_trace (false); + this->offSize = off_size; + if (unlikely (!c->allocate_size<HBUINT8> (off_size * (this->count + 1), false))) + return_trace (false); + + /* serialize indices */ + unsigned int offset = 1; + if (HB_OPTIMIZE_SIZE_VAL) + { + unsigned int i = 0; + for (const auto &_ : +it) + { + set_offset_at (i++, offset); + offset += length_f (_); + } + set_offset_at (i, offset); + } + else + switch (off_size) + { + case 1: + { + HBUINT8 *p = (HBUINT8 *) offsets; + for (const auto &_ : +it) + { + *p++ = offset; + offset += length_f (_); + } + *p = offset; + } + break; + case 2: + { + HBUINT16 *p = (HBUINT16 *) offsets; + for (const auto &_ : +it) + { + *p++ = offset; + offset += length_f (_); + } + *p = offset; + } + break; + case 3: + { + HBUINT24 *p = (HBUINT24 *) offsets; + for (const auto &_ : +it) + { + *p++ = offset; + offset += length_f (_); + } + *p = offset; + } + break; + case 4: + { + HBUINT32 *p = (HBUINT32 *) offsets; + for (const auto &_ : +it) + { + *p++ = offset; + offset += length_f (_); + } + *p = offset; + } + break; + default: + break; + } + + assert (offset == data_size + 1); + return_trace (true); + } + + template <typename Iterable, + hb_requires (hb_is_iterable (Iterable))> + static unsigned total_size (const Iterable &iterable, unsigned *data_size = nullptr, unsigned min_off_size = 0) + { + auto it = + hb_iter (iterable); + if (!it) + { + if (data_size) *data_size = 0; + return min_size; + } + + unsigned total = 0; + for (const auto &_ : +it) + total += length_f (_); + + if (data_size) *data_size = total; + + unsigned off_size = (hb_bit_storage (total + 1) + 7) / 8; + off_size = hb_max(min_off_size, off_size); + + return min_size + HBUINT8::static_size + (hb_len (it) + 1) * off_size + total; + } + + void set_offset_at (unsigned int index, unsigned int offset) + { + assert (index <= count); + + unsigned int size = offSize; + const HBUINT8 *p = offsets; + switch (size) + { + case 1: ((HBUINT8 *) p)[index] = offset; break; + case 2: ((HBUINT16 *) p)[index] = offset; break; + case 3: ((HBUINT24 *) p)[index] = offset; break; + case 4: ((HBUINT32 *) p)[index] = offset; break; + default: return; + } + } + + private: + unsigned int offset_at (unsigned int index) const + { + assert (index <= count); + + unsigned int size = offSize; + const HBUINT8 *p = offsets; + switch (size) + { + case 1: return ((HBUINT8 *) p)[index]; + case 2: return ((HBUINT16 *) p)[index]; + case 3: return ((HBUINT24 *) p)[index]; + case 4: return ((HBUINT32 *) p)[index]; + default: return 0; + } + } + + const unsigned char *data_base () const + { return (const unsigned char *) this + min_size + offSize.static_size - 1 + offset_array_size (); } + public: + + hb_ubytes_t operator [] (unsigned int index) const + { + if (unlikely (index >= count)) return hb_ubytes_t (); + _hb_compiler_memory_r_barrier (); + unsigned offset0 = offset_at (index); + unsigned offset1 = offset_at (index + 1); + if (unlikely (offset1 < offset0 || offset1 > offset_at (count))) + return hb_ubytes_t (); + return hb_ubytes_t (data_base () + offset0, offset1 - offset0); + } + + unsigned int get_size () const + { + if (count) + return min_size + offSize.static_size + offset_array_size () + (offset_at (count) - 1); + return min_size; /* empty CFFIndex contains count only */ + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (likely (c->check_struct (this) && + hb_barrier () && + (count == 0 || /* empty INDEX */ + (count < count + 1u && + hb_barrier () && + c->check_struct (&offSize) && offSize >= 1 && offSize <= 4 && + c->check_array (offsets, offSize, count + 1u) && + c->check_array ((const HBUINT8*) data_base (), 1, offset_at (count)))))); + } + + public: + COUNT count; /* Number of object data. Note there are (count+1) offsets */ + private: + HBUINT8 offSize; /* The byte size of each offset in the offsets array. */ + HBUINT8 offsets[HB_VAR_ARRAY]; + /* The array of (count + 1) offsets into objects array (1-base). */ + /* HBUINT8 data[HB_VAR_ARRAY]; Object data */ + public: + DEFINE_SIZE_MIN (COUNT::static_size); +}; + +/* Top Dict, Font Dict, Private Dict */ +struct Dict : UnsizedByteStr +{ + template <typename DICTVAL, typename OP_SERIALIZER, typename ...Ts> + bool serialize (hb_serialize_context_t *c, + const DICTVAL &dictval, + OP_SERIALIZER& opszr, + Ts&&... ds) + { + TRACE_SERIALIZE (this); + for (unsigned int i = 0; i < dictval.get_count (); i++) + if (unlikely (!opszr.serialize (c, dictval[i], std::forward<Ts> (ds)...))) + return_trace (false); + + return_trace (true); + } + + template <typename T, typename V> + static bool serialize_int_op (hb_serialize_context_t *c, op_code_t op, V value, op_code_t intOp) + { + if (unlikely ((!serialize_int<T, V> (c, intOp, value)))) + return false; + + TRACE_SERIALIZE (this); + /* serialize the opcode */ + HBUINT8 *p = c->allocate_size<HBUINT8> (OpCode_Size (op), false); + if (unlikely (!p)) return_trace (false); + if (Is_OpCode_ESC (op)) + { + *p = OpCode_escape; + op = Unmake_OpCode_ESC (op); + p++; + } + *p = op; + return_trace (true); + } + + template <typename V> + static bool serialize_int4_op (hb_serialize_context_t *c, op_code_t op, V value) + { return serialize_int_op<HBINT32> (c, op, value, OpCode_longintdict); } + + template <typename V> + static bool serialize_int2_op (hb_serialize_context_t *c, op_code_t op, V value) + { return serialize_int_op<HBINT16> (c, op, value, OpCode_shortint); } + + template <typename T, int int_op> + static bool serialize_link_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence) + { + T &ofs = *(T *) (c->head + OpCode_Size (int_op)); + if (unlikely (!serialize_int_op<T> (c, op, 0, int_op))) return false; + c->add_link (ofs, link, whence); + return true; + } + + static bool serialize_link4_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head) + { return serialize_link_op<HBINT32, OpCode_longintdict> (c, op, link, whence); } + + static bool serialize_link2_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head) + { return serialize_link_op<HBINT16, OpCode_shortint> (c, op, link, whence); } +}; + +struct TopDict : Dict {}; +struct FontDict : Dict {}; +struct PrivateDict : Dict {}; + +struct table_info_t +{ + void init () { offset = size = 0; link = 0; } + + unsigned int offset; + unsigned int size; + objidx_t link; +}; + +template <typename COUNT> +struct FDArray : CFFIndex<COUNT> +{ + template <typename DICTVAL, typename INFO, typename Iterator, typename OP_SERIALIZER> + bool serialize (hb_serialize_context_t *c, + Iterator it, + OP_SERIALIZER& opszr) + { + TRACE_SERIALIZE (this); + + /* serialize INDEX data */ + hb_vector_t<unsigned> sizes; + if (it.is_random_access_iterator) + sizes.alloc (hb_len (it)); + + c->push (); + char *data_base = c->head; + + it + | hb_map ([&] (const hb_pair_t<const DICTVAL&, const INFO&> &_) + { + FontDict *dict = c->start_embed<FontDict> (); + dict->serialize (c, _.first, opszr, _.second); + return c->head - (const char*)dict; + }) + | hb_sink (sizes) + ; + unsigned data_size = c->head - data_base; + c->pop_pack (false); + + if (unlikely (sizes.in_error ())) return_trace (false); + + /* It just happens that the above is packed right after the header below. + * Such a hack. */ + + /* serialize INDEX header */ + return_trace (CFFIndex<COUNT>::serialize_header (c, hb_iter (sizes), data_size)); + } +}; + +/* FDSelect */ +struct FDSelect0 { + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!(c->check_struct (this)))) + return_trace (false); + hb_barrier (); + if (unlikely (!c->check_array (fds, c->get_num_glyphs ()))) + return_trace (false); + + return_trace (true); + } + + unsigned get_fd (hb_codepoint_t glyph) const + { return fds[glyph]; } + + hb_pair_t<unsigned, hb_codepoint_t> get_fd_range (hb_codepoint_t glyph) const + { return {fds[glyph], glyph + 1}; } + + unsigned int get_size (unsigned int num_glyphs) const + { return HBUINT8::static_size * num_glyphs; } + + HBUINT8 fds[HB_VAR_ARRAY]; + + DEFINE_SIZE_MIN (0); +}; + +template <typename GID_TYPE, typename FD_TYPE> +struct FDSelect3_4_Range +{ + bool sanitize (hb_sanitize_context_t *c, const void * /*nullptr*/, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + hb_barrier () && + first < c->get_num_glyphs () && (fd < fdcount)); + } + + GID_TYPE first; + FD_TYPE fd; + public: + DEFINE_SIZE_STATIC (GID_TYPE::static_size + FD_TYPE::static_size); +}; + +template <typename GID_TYPE, typename FD_TYPE> +struct FDSelect3_4 +{ + unsigned int get_size () const + { return GID_TYPE::static_size * 2 + ranges.get_size (); } + + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!(c->check_struct (this) && + ranges.sanitize (c, nullptr, fdcount) && + hb_barrier () && + (nRanges () != 0) && + ranges[0].first == 0))) + return_trace (false); + + for (unsigned int i = 1; i < nRanges (); i++) + if (unlikely (ranges[i - 1].first >= ranges[i].first)) + return_trace (false); + + if (unlikely (!(sentinel().sanitize (c) && + hb_barrier () && + (sentinel() == c->get_num_glyphs ())))) + return_trace (false); + + return_trace (true); + } + + static int _cmp_range (const void *_key, const void *_item) + { + hb_codepoint_t glyph = * (hb_codepoint_t *) _key; + FDSelect3_4_Range<GID_TYPE, FD_TYPE> *range = (FDSelect3_4_Range<GID_TYPE, FD_TYPE> *) _item; + + if (glyph < range[0].first) return -1; + if (glyph < range[1].first) return 0; + return +1; + } + + unsigned get_fd (hb_codepoint_t glyph) const + { + auto *range = hb_bsearch (glyph, &ranges[0], nRanges () - 1, sizeof (ranges[0]), _cmp_range); + return range ? range->fd : ranges[nRanges () - 1].fd; + } + + hb_pair_t<unsigned, hb_codepoint_t> get_fd_range (hb_codepoint_t glyph) const + { + auto *range = hb_bsearch (glyph, &ranges[0], nRanges () - 1, sizeof (ranges[0]), _cmp_range); + unsigned fd = range ? range->fd : ranges[nRanges () - 1].fd; + hb_codepoint_t end = range ? range[1].first : ranges[nRanges () - 1].first; + return {fd, end}; + } + + GID_TYPE &nRanges () { return ranges.len; } + GID_TYPE nRanges () const { return ranges.len; } + GID_TYPE &sentinel () { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); } + const GID_TYPE &sentinel () const { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); } + + ArrayOf<FDSelect3_4_Range<GID_TYPE, FD_TYPE>, GID_TYPE> ranges; + /* GID_TYPE sentinel */ + + DEFINE_SIZE_ARRAY (GID_TYPE::static_size, ranges); +}; + +typedef FDSelect3_4<HBUINT16, HBUINT8> FDSelect3; +typedef FDSelect3_4_Range<HBUINT16, HBUINT8> FDSelect3_Range; + +struct FDSelect +{ + bool serialize (hb_serialize_context_t *c, const FDSelect &src, unsigned int num_glyphs) + { + TRACE_SERIALIZE (this); + unsigned int size = src.get_size (num_glyphs); + FDSelect *dest = c->allocate_size<FDSelect> (size, false); + if (unlikely (!dest)) return_trace (false); + hb_memcpy (dest, &src, size); + return_trace (true); + } + + unsigned int get_size (unsigned int num_glyphs) const + { + switch (format) + { + case 0: return format.static_size + u.format0.get_size (num_glyphs); + case 3: return format.static_size + u.format3.get_size (); + default:return 0; + } + } + + unsigned get_fd (hb_codepoint_t glyph) const + { + if (this == &Null (FDSelect)) return 0; + + switch (format) + { + case 0: return u.format0.get_fd (glyph); + case 3: return u.format3.get_fd (glyph); + default:return 0; + } + } + /* Returns pair of fd and one after last glyph in range. */ + hb_pair_t<unsigned, hb_codepoint_t> get_fd_range (hb_codepoint_t glyph) const + { + if (this == &Null (FDSelect)) return {0, 1}; + + switch (format) + { + case 0: return u.format0.get_fd_range (glyph); + case 3: return u.format3.get_fd_range (glyph); + default:return {0, 1}; + } + } + + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + hb_barrier (); + + switch (format) + { + case 0: return_trace (u.format0.sanitize (c, fdcount)); + case 3: return_trace (u.format3.sanitize (c, fdcount)); + default:return_trace (false); + } + } + + HBUINT8 format; + union { + FDSelect0 format0; + FDSelect3 format3; + } u; + public: + DEFINE_SIZE_MIN (1); +}; + +template <typename COUNT> +struct Subrs : CFFIndex<COUNT> +{ + typedef COUNT count_type; + typedef CFFIndex<COUNT> SUPER; +}; + +} /* namespace CFF */ + +#endif /* HB_OT_CFF_COMMON_HH */ |