diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh | 267 |
1 files changed, 162 insertions, 105 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh b/src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh index 8bbc017656..ff50b0e518 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-subset-cff-common.hh @@ -81,7 +81,8 @@ struct str_encoder_t } } - void encode_num (const number_t& n) + // Encode number for CharString + void encode_num_cs (const number_t& n) { if (n.in_int_range ()) { @@ -98,6 +99,91 @@ struct str_encoder_t } } + // Encode number for TopDict / Private + void encode_num_tp (const number_t& n) + { + if (n.in_int_range ()) + { + // TODO longint + encode_int (n.to_int ()); + } + else + { + // Sigh. BCD + // https://learn.microsoft.com/en-us/typography/opentype/spec/cff2#table-5-nibble-definitions + double v = n.to_real (); + encode_byte (OpCode_BCD); + + // Based on: + // https://github.com/fonttools/fonttools/blob/97ed3a61cde03e17b8be36f866192fbd56f1d1a7/Lib/fontTools/misc/psCharStrings.py#L265-L294 + + char buf[16]; + /* FontTools has the following comment: + * + * # Note: 14 decimal digits seems to be the limitation for CFF real numbers + * # in macOS. However, we use 8 here to match the implementation of AFDKO. + * + * We use 8 here to match FontTools X-). + */ + + hb_locale_t clocale HB_UNUSED; + hb_locale_t oldlocale HB_UNUSED; + oldlocale = hb_uselocale (clocale = newlocale (LC_ALL_MASK, "C", NULL)); + snprintf (buf, sizeof (buf), "%.8G", v); + (void) hb_uselocale (((void) freelocale (clocale), oldlocale)); + + char *s = buf; + if (s[0] == '0' && s[1] == '.') + s++; + else if (s[0] == '-' && s[1] == '0' && s[2] == '.') + { + s[1] = '-'; + s++; + } + hb_vector_t<char> nibbles; + while (*s) + { + char c = s[0]; + s++; + + switch (c) + { + case 'E': + { + char c2 = *s; + if (c2 == '-') + { + s++; + nibbles.push (0x0C); // E- + continue; + } + if (c2 == '+') + s++; + nibbles.push (0x0B); // E + continue; + } + + case '.': case ',': // Comma for some European locales in case no uselocale available. + nibbles.push (0x0A); // . + continue; + + case '-': + nibbles.push (0x0E); // . + continue; + } + + nibbles.push (c - '0'); + } + nibbles.push (0x0F); + if (nibbles.length % 2) + nibbles.push (0x0F); + + unsigned count = nibbles.length; + for (unsigned i = 0; i < count; i += 2) + encode_byte ((nibbles[i] << 4) | nibbles[i+1]); + } + } + void encode_op (op_code_t op) { if (Is_OpCode_ESC (op)) @@ -190,39 +276,11 @@ struct cff_font_dict_op_serializer_t : op_serializer_t } }; -struct cff_private_dict_op_serializer_t : op_serializer_t -{ - cff_private_dict_op_serializer_t (bool desubroutinize_, bool drop_hints_) - : desubroutinize (desubroutinize_), drop_hints (drop_hints_) {} - - bool serialize (hb_serialize_context_t *c, - const op_str_t &opstr, - objidx_t subrs_link) const - { - TRACE_SERIALIZE (this); - - if (drop_hints && dict_opset_t::is_hint_op (opstr.op)) - return true; - if (opstr.op == OpCode_Subrs) - { - if (desubroutinize || !subrs_link) - return_trace (true); - else - return_trace (FontDict::serialize_link2_op (c, opstr.op, subrs_link)); - } - else - return_trace (copy_opstr (c, opstr)); - } - - protected: - const bool desubroutinize; - const bool drop_hints; -}; - struct flatten_param_t { str_buff_t &flatStr; bool drop_hints; + const hb_subset_plan_t *plan; }; template <typename ACC, typename ENV, typename OPSET, op_code_t endchar_op=OpCode_Invalid> @@ -235,7 +293,7 @@ struct subr_flattener_t bool flatten (str_buff_vec_t &flat_charstrings) { unsigned count = plan->num_output_glyphs (); - if (!flat_charstrings.resize (count)) + if (!flat_charstrings.resize_exact (count)) return false; for (unsigned int i = 0; i < count; i++) { @@ -250,11 +308,15 @@ struct subr_flattener_t unsigned int fd = acc.fdSelect->get_fd (glyph); if (unlikely (fd >= acc.fdCount)) return false; - ENV env (str, acc, fd); + + + ENV env (str, acc, fd, + plan->normalized_coords.arrayZ, plan->normalized_coords.length); cs_interpreter_t<ENV, OPSET, flatten_param_t> interp (env); flatten_param_t param = { flat_charstrings.arrayZ[i], - (bool) (plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + (bool) (plan->flags & HB_SUBSET_FLAGS_NO_HINTING), + plan }; if (unlikely (!interp.interpret (param))) return false; @@ -270,7 +332,7 @@ struct subr_closures_t { subr_closures_t (unsigned int fd_count) : global_closure (), local_closures () { - local_closures.resize (fd_count); + local_closures.resize_exact (fd_count); } void reset () @@ -361,6 +423,35 @@ struct parsed_cs_str_t : parsed_values_t<parsed_cs_op_t> bool has_calls () const { return has_calls_; } + void compact () + { + unsigned count = values.length; + if (!count) return; + auto &opstr = values.arrayZ; + unsigned j = 0; + for (unsigned i = 1; i < count; i++) + { + /* See if we can combine op j and op i. */ + bool combine = + (opstr[j].op != OpCode_callsubr && opstr[j].op != OpCode_callgsubr) && + (opstr[i].op != OpCode_callsubr && opstr[i].op != OpCode_callgsubr) && + (opstr[j].is_hinting () == opstr[i].is_hinting ()) && + (opstr[j].ptr + opstr[j].length == opstr[i].ptr) && + (opstr[j].length + opstr[i].length <= 255); + + if (combine) + { + opstr[j].length += opstr[i].length; + opstr[j].op = OpCode_Invalid; + } + else + { + opstr[++j] = opstr[i]; + } + } + values.shrink (j + 1); + } + protected: bool parsed : 1; bool hint_dropped : 1; @@ -486,7 +577,7 @@ struct subr_subset_param_t else { if (!parsed_str->is_parsed ()) - parsed_str->alloc (env.str_ref.total_size () / 2); + parsed_str->alloc (env.str_ref.total_size ()); current_parsed_str = parsed_str; } } @@ -589,12 +680,12 @@ struct subr_subsetter_t if (cff_accelerator) { // If we are not dropping hinting then charstrings are not modified so we can // just use a reference to the cached copies. - cached_charstrings.resize (plan->num_output_glyphs ()); + cached_charstrings.resize_exact (plan->num_output_glyphs ()); parsed_global_subrs = &cff_accelerator->parsed_global_subrs; parsed_local_subrs = &cff_accelerator->parsed_local_subrs; } else { - parsed_charstrings.resize (plan->num_output_glyphs ()); - parsed_global_subrs_storage.resize (acc.globalSubrs->count); + parsed_charstrings.resize_exact (plan->num_output_glyphs ()); + parsed_global_subrs_storage.resize_exact (acc.globalSubrs->count); if (unlikely (!parsed_local_subrs_storage.resize (fd_count))) return false; @@ -644,7 +735,7 @@ struct subr_subsetter_t ENV env (str, acc, fd); cs_interpreter_t<ENV, OPSET, subr_subset_param_t> interp (env); - parsed_charstrings[i].alloc (str.length / 2); + parsed_charstrings[i].alloc (str.length); subr_subset_param_t param (&parsed_charstrings[i], &parsed_global_subrs_storage, &parsed_local_subrs_storage[fd], @@ -657,28 +748,10 @@ struct subr_subsetter_t /* complete parsed string esp. copy CFF1 width or CFF2 vsindex to the parsed charstring for encoding */ SUBSETTER::complete_parsed_str (interp.env, param, parsed_charstrings[i]); - } - - // Since parsed strings were loaded from accelerator, we still need - // to compute the subroutine closures which would have normally happened during - // parsing. - if (cff_accelerator && - !closure_subroutines(*parsed_global_subrs, - *parsed_local_subrs)) - return false; - if ((plan->flags & HB_SUBSET_FLAGS_NO_HINTING && !cff_accelerator) || - plan->inprogress_accelerator) - { /* mark hint ops and arguments for drop */ - for (unsigned int i = 0; i < plan->num_output_glyphs (); i++) + if ((plan->flags & HB_SUBSET_FLAGS_NO_HINTING) || plan->inprogress_accelerator) { - hb_codepoint_t glyph; - if (!plan->old_gid_for_new_gid (i, &glyph)) - continue; - unsigned int fd = acc.fdSelect->get_fd (glyph); - if (unlikely (fd >= acc.fdCount)) - return false; subr_subset_param_t param (&parsed_charstrings[i], &parsed_global_subrs_storage, &parsed_local_subrs_storage[fd], @@ -695,21 +768,36 @@ struct subr_subsetter_t } } - /* after dropping hints recreate closures of actually used subrs */ - if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING && - !cff_accelerator && - !closure_subroutines(*parsed_global_subrs, *parsed_local_subrs)) return false; + /* Doing this here one by one instead of compacting all at the en + * has massive peak-memory saving. + * + * The compacting both saves memory and makes further operations + * faster. + */ + parsed_charstrings[i].compact (); } + /* Since parsed strings were loaded from accelerator, we still need + * to compute the subroutine closures which would have normally happened during + * parsing. + * + * Or if we are dropping hinting, redo closure to get actually used subrs. + */ + if ((cff_accelerator || + (!cff_accelerator && plan->flags & HB_SUBSET_FLAGS_NO_HINTING)) && + !closure_subroutines(*parsed_global_subrs, + *parsed_local_subrs)) + return false; + remaps.create (closures); populate_subset_accelerator (); return true; } - bool encode_charstrings (str_buff_vec_t &buffArray) const + bool encode_charstrings (str_buff_vec_t &buffArray, bool encode_prefix = true) const { - if (unlikely (!buffArray.resize (plan->num_output_glyphs ()))) + if (unlikely (!buffArray.resize_exact (plan->num_output_glyphs ()))) return false; for (unsigned int i = 0; i < plan->num_output_glyphs (); i++) { @@ -723,7 +811,7 @@ struct subr_subsetter_t unsigned int fd = acc.fdSelect->get_fd (glyph); if (unlikely (fd >= acc.fdCount)) return false; - if (unlikely (!encode_str (get_parsed_charstring (i), fd, buffArray.arrayZ[i]))) + if (unlikely (!encode_str (get_parsed_charstring (i), fd, buffArray.arrayZ[i], encode_prefix))) return false; } return true; @@ -733,7 +821,7 @@ struct subr_subsetter_t { unsigned int count = remap.get_population (); - if (unlikely (!buffArray.resize (count))) + if (unlikely (!buffArray.resize_exact (count))) return false; for (unsigned int new_num = 0; new_num < count; new_num++) { @@ -953,16 +1041,16 @@ struct subr_subsetter_t } } - bool encode_str (const parsed_cs_str_t &str, const unsigned int fd, str_buff_t &buff) const + bool encode_str (const parsed_cs_str_t &str, const unsigned int fd, str_buff_t &buff, bool encode_prefix = true) const { str_encoder_t encoder (buff); encoder.reset (); bool hinting = !(plan->flags & HB_SUBSET_FLAGS_NO_HINTING); /* if a prefix (CFF1 width or CFF2 vsindex) has been removed along with hints, * re-insert it at the beginning of charstreing */ - if (str.has_prefix () && !hinting && str.is_hint_dropped ()) + if (encode_prefix && str.has_prefix () && !hinting && str.is_hint_dropped ()) { - encoder.encode_num (str.prefix_num ()); + encoder.encode_num_cs (str.prefix_num ()); if (str.prefix_op () != OpCode_Invalid) encoder.encode_op (str.prefix_op ()); } @@ -974,7 +1062,7 @@ struct subr_subsetter_t if (opstr.op == OpCode_callsubr || opstr.op == OpCode_callgsubr) size += 3; } - if (!buff.alloc (buff.length + size)) + if (!buff.alloc (buff.length + size, true)) return false; for (auto &opstr : str.values) @@ -1002,51 +1090,20 @@ struct subr_subsetter_t return !encoder.in_error (); } - void compact_parsed_strings () const + void compact_parsed_subrs () const { - for (auto &cs : parsed_charstrings) - compact_string (cs); for (auto &cs : parsed_global_subrs_storage) - compact_string (cs); + cs.compact (); for (auto &vec : parsed_local_subrs_storage) for (auto &cs : vec) - compact_string (cs); - } - - static void compact_string (parsed_cs_str_t &str) - { - unsigned count = str.values.length; - if (unlikely (!count)) return; - auto &opstr = str.values.arrayZ; - unsigned j = 0; - for (unsigned i = 1; i < count; i++) - { - /* See if we can combine op j and op i. */ - bool combine = - (opstr[j].op != OpCode_callsubr && opstr[j].op != OpCode_callgsubr) && - (opstr[i].op != OpCode_callsubr && opstr[i].op != OpCode_callgsubr) && - (opstr[j].is_hinting () == opstr[i].is_hinting ()) && - (opstr[j].ptr + opstr[j].length == opstr[i].ptr) && - (opstr[j].length + opstr[i].length <= 255); - - if (combine) - { - opstr[j].length += opstr[i].length; - opstr[j].op = OpCode_Invalid; - } - else - { - opstr[++j] = opstr[i]; - } - } - str.values.shrink (j + 1); + cs.compact (); } void populate_subset_accelerator () const { if (!plan->inprogress_accelerator) return; - compact_parsed_strings (); + compact_parsed_subrs (); plan->inprogress_accelerator->cff_accelerator = cff_subset_accelerator_t::create(acc.blob, |