2 * Copyright © 2018 Adobe Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Adobe Author(s): Michiharu Ariza
27 #ifndef HB_SUBSET_CFF_COMMON_HH
28 #define HB_SUBSET_CFF_COMMON_HH
32 #include "hb-subset-plan.hh"
33 #include "hb-cff-interp-cs-common.hh"
37 /* Used for writing a temporary charstring */
40 str_encoder_t (str_buff_t &buff_)
41 : buff (buff_), error (false) {}
43 void reset () { buff.resize (0); }
45 void encode_byte (unsigned char b)
47 if (unlikely (buff.push (b) == &Crap(unsigned char)))
51 void encode_int (int v)
53 if ((-1131 <= v) && (v <= 1131))
55 if ((-107 <= v) && (v <= 107))
56 encode_byte (v + 139);
60 encode_byte ((v >> 8) + OpCode_TwoBytePosInt0);
61 encode_byte (v & 0xFF);
66 encode_byte ((v >> 8) + OpCode_TwoByteNegInt0);
67 encode_byte (v & 0xFF);
72 if (unlikely (v < -32768))
74 else if (unlikely (v > 32767))
76 encode_byte (OpCode_shortint);
77 encode_byte ((v >> 8) & 0xFF);
78 encode_byte (v & 0xFF);
82 void encode_num (const number_t& n)
84 if (n.in_int_range ())
86 encode_int (n.to_int ());
90 int32_t v = n.to_fixed ();
91 encode_byte (OpCode_fixedcs);
92 encode_byte ((v >> 24) & 0xFF);
93 encode_byte ((v >> 16) & 0xFF);
94 encode_byte ((v >> 8) & 0xFF);
95 encode_byte (v & 0xFF);
99 void encode_op (op_code_t op)
101 if (Is_OpCode_ESC (op))
103 encode_byte (OpCode_escape);
104 encode_byte (Unmake_OpCode_ESC (op));
110 void copy_str (const byte_str_t &str)
112 unsigned int offset = buff.length;
113 buff.resize (offset + str.length);
114 if (unlikely (buff.length < offset + str.length))
119 memcpy (&buff[offset], &str[0], str.length);
122 bool is_error () const { return error; }
125 void set_error () { error = true; }
131 struct cff_sub_table_offsets_t {
132 cff_sub_table_offsets_t () : privateDictsOffset (0)
135 FDSelectInfo.init ();
137 charStringsInfo.init ();
138 globalSubrsInfo.init ();
139 localSubrsInfos.init ();
142 ~cff_sub_table_offsets_t () { localSubrsInfos.fini (); }
144 table_info_t topDictInfo;
145 table_info_t FDSelectInfo;
146 table_info_t FDArrayInfo;
147 table_info_t charStringsInfo;
148 unsigned int privateDictsOffset;
149 table_info_t globalSubrsInfo;
150 hb_vector_t<table_info_t> localSubrsInfos;
153 template <typename OPSTR=op_str_t>
154 struct cff_top_dict_op_serializer_t : op_serializer_t
156 bool serialize (hb_serialize_context_t *c,
158 const cff_sub_table_offsets_t &offsets) const
160 TRACE_SERIALIZE (this);
164 case OpCode_CharStrings:
165 return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.charStringsInfo.offset));
168 return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.FDArrayInfo.offset));
170 case OpCode_FDSelect:
171 return_trace (FontDict::serialize_offset4_op(c, opstr.op, offsets.FDSelectInfo.offset));
174 return_trace (copy_opstr (c, opstr));
179 unsigned int calculate_serialized_size (const OPSTR &opstr) const
183 case OpCode_CharStrings:
185 case OpCode_FDSelect:
186 return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (opstr.op);
189 return opstr.str.length;
194 struct cff_font_dict_op_serializer_t : op_serializer_t
196 bool serialize (hb_serialize_context_t *c,
197 const op_str_t &opstr,
198 const table_info_t &privateDictInfo) const
200 TRACE_SERIALIZE (this);
202 if (opstr.op == OpCode_Private)
204 /* serialize the private dict size & offset as 2-byte & 4-byte integers */
205 if (unlikely (!UnsizedByteStr::serialize_int2 (c, privateDictInfo.size) ||
206 !UnsizedByteStr::serialize_int4 (c, privateDictInfo.offset)))
207 return_trace (false);
209 /* serialize the opcode */
210 HBUINT8 *p = c->allocate_size<HBUINT8> (1);
211 if (unlikely (p == nullptr)) return_trace (false);
218 HBUINT8 *d = c->allocate_size<HBUINT8> (opstr.str.length);
219 if (unlikely (d == nullptr)) return_trace (false);
220 memcpy (d, &opstr.str[0], opstr.str.length);
225 unsigned int calculate_serialized_size (const op_str_t &opstr) const
227 if (opstr.op == OpCode_Private)
228 return OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (OpCode_shortint) + 2 + OpCode_Size (OpCode_Private);
230 return opstr.str.length;
234 struct cff_private_dict_op_serializer_t : op_serializer_t
236 cff_private_dict_op_serializer_t (bool desubroutinize_, bool drop_hints_)
237 : desubroutinize (desubroutinize_), drop_hints (drop_hints_) {}
239 bool serialize (hb_serialize_context_t *c,
240 const op_str_t &opstr,
241 const unsigned int subrsOffset) const
243 TRACE_SERIALIZE (this);
245 if (drop_hints && dict_opset_t::is_hint_op (opstr.op))
247 if (opstr.op == OpCode_Subrs)
249 if (desubroutinize || (subrsOffset == 0))
252 return_trace (FontDict::serialize_offset2_op (c, opstr.op, subrsOffset));
255 return_trace (copy_opstr (c, opstr));
258 unsigned int calculate_serialized_size (const op_str_t &opstr,
259 bool has_localsubr=true) const
261 if (drop_hints && dict_opset_t::is_hint_op (opstr.op))
263 if (opstr.op == OpCode_Subrs)
265 if (desubroutinize || !has_localsubr)
268 return OpCode_Size (OpCode_shortint) + 2 + OpCode_Size (opstr.op);
271 return opstr.str.length;
275 const bool desubroutinize;
276 const bool drop_hints;
279 struct flatten_param_t
285 template <typename ACC, typename ENV, typename OPSET, op_code_t endchar_op=OpCode_Invalid>
286 struct subr_flattener_t
288 subr_flattener_t (const ACC &acc_,
289 const hb_subset_plan_t *plan_)
290 : acc (acc_), plan (plan_) {}
292 bool flatten (str_buff_vec_t &flat_charstrings)
294 if (!flat_charstrings.resize (plan->num_output_glyphs ()))
296 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
297 flat_charstrings[i].init ();
298 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
300 hb_codepoint_t glyph;
301 if (!plan->old_gid_for_new_gid (i, &glyph))
303 /* add an endchar only charstring for a missing glyph if CFF1 */
304 if (endchar_op != OpCode_Invalid) flat_charstrings[i].push (endchar_op);
307 const byte_str_t str = (*acc.charStrings)[glyph];
308 unsigned int fd = acc.fdSelect->get_fd (glyph);
309 if (unlikely (fd >= acc.fdCount))
311 cs_interpreter_t<ENV, OPSET, flatten_param_t> interp;
312 interp.env.init (str, acc, fd);
313 flatten_param_t param = { flat_charstrings[i], plan->drop_hints };
314 if (unlikely (!interp.interpret (param)))
321 const hb_subset_plan_t *plan;
324 struct subr_closures_t
326 subr_closures_t () : valid (false), global_closure (nullptr)
327 { local_closures.init (); }
329 void init (unsigned int fd_count)
332 global_closure = hb_set_create ();
333 if (global_closure == hb_set_get_empty ())
335 if (!local_closures.resize (fd_count))
338 for (unsigned int i = 0; i < local_closures.length; i++)
340 local_closures[i] = hb_set_create ();
341 if (local_closures[i] == hb_set_get_empty ())
348 hb_set_destroy (global_closure);
349 for (unsigned int i = 0; i < local_closures.length; i++)
350 hb_set_destroy (local_closures[i]);
351 local_closures.fini ();
356 hb_set_clear (global_closure);
357 for (unsigned int i = 0; i < local_closures.length; i++)
358 hb_set_clear (local_closures[i]);
361 bool is_valid () const { return valid; }
363 hb_set_t *global_closure;
364 hb_vector_t<hb_set_t *> local_closures;
367 struct parsed_cs_op_t : op_str_t
369 void init (unsigned int subr_num_ = 0)
372 subr_num = subr_num_;
378 void fini () { op_str_t::fini (); }
380 bool for_drop () const { return drop_flag; }
381 void set_drop () { if (!for_keep ()) drop_flag = true; }
383 bool for_keep () const { return keep_flag; }
384 void set_keep () { keep_flag = true; }
386 bool for_skip () const { return skip_flag; }
387 void set_skip () { skip_flag = true; }
389 unsigned int subr_num;
397 struct parsed_cs_str_t : parsed_values_t<parsed_cs_op_t>
403 hint_dropped = false;
407 void add_op (op_code_t op, const byte_str_ref_t& str_ref)
410 SUPER::add_op (op, str_ref);
413 void add_call_op (op_code_t op, const byte_str_ref_t& str_ref, unsigned int subr_num)
417 unsigned int parsed_len = get_count ();
418 if (likely (parsed_len > 0))
419 values[parsed_len-1].set_skip ();
423 SUPER::add_op (op, str_ref, val);
427 void set_prefix (const number_t &num, op_code_t op = OpCode_Invalid)
434 bool at_end (unsigned int pos) const
436 return ((pos + 1 >= values.length) /* CFF2 */
437 || (values[pos + 1].op == OpCode_return));
440 bool is_parsed () const { return parsed; }
441 void set_parsed () { parsed = true; }
443 bool is_hint_dropped () const { return hint_dropped; }
444 void set_hint_dropped () { hint_dropped = true; }
446 bool is_vsindex_dropped () const { return vsindex_dropped; }
447 void set_vsindex_dropped () { vsindex_dropped = true; }
449 bool has_prefix () const { return has_prefix_; }
450 op_code_t prefix_op () const { return prefix_op_; }
451 const number_t &prefix_num () const { return prefix_num_; }
456 bool vsindex_dropped;
458 op_code_t prefix_op_;
459 number_t prefix_num_;
462 typedef parsed_values_t<parsed_cs_op_t> SUPER;
465 struct parsed_cs_str_vec_t : hb_vector_t<parsed_cs_str_t>
467 void init (unsigned int len_ = 0)
471 for (unsigned int i = 0; i < length; i++)
474 void fini () { SUPER::fini_deep (); }
477 typedef hb_vector_t<parsed_cs_str_t> SUPER;
480 struct subr_subset_param_t
482 void init (parsed_cs_str_t *parsed_charstring_,
483 parsed_cs_str_vec_t *parsed_global_subrs_, parsed_cs_str_vec_t *parsed_local_subrs_,
484 hb_set_t *global_closure_, hb_set_t *local_closure_,
487 parsed_charstring = parsed_charstring_;
488 current_parsed_str = parsed_charstring;
489 parsed_global_subrs = parsed_global_subrs_;
490 parsed_local_subrs = parsed_local_subrs_;
491 global_closure = global_closure_;
492 local_closure = local_closure_;
493 drop_hints = drop_hints_;
496 parsed_cs_str_t *get_parsed_str_for_context (call_context_t &context)
498 switch (context.type)
500 case CSType_CharString:
501 return parsed_charstring;
503 case CSType_LocalSubr:
504 if (likely (context.subr_num < parsed_local_subrs->length))
505 return &(*parsed_local_subrs)[context.subr_num];
508 case CSType_GlobalSubr:
509 if (likely (context.subr_num < parsed_global_subrs->length))
510 return &(*parsed_global_subrs)[context.subr_num];
516 template <typename ENV>
517 void set_current_str (ENV &env, bool calling)
519 parsed_cs_str_t *parsed_str = get_parsed_str_for_context (env.context);
520 if (likely (parsed_str != nullptr))
522 /* If the called subroutine is parsed partially but not completely yet,
523 * it must be because we are calling it recursively.
524 * Handle it as an error. */
525 if (unlikely (calling && !parsed_str->is_parsed () && (parsed_str->values.length > 0)))
528 current_parsed_str = parsed_str;
534 parsed_cs_str_t *current_parsed_str;
536 parsed_cs_str_t *parsed_charstring;
537 parsed_cs_str_vec_t *parsed_global_subrs;
538 parsed_cs_str_vec_t *parsed_local_subrs;
539 hb_set_t *global_closure;
540 hb_set_t *local_closure;
544 struct subr_remap_t : hb_inc_bimap_t
546 void create (hb_set_t *closure)
548 /* create a remapping of subroutine numbers from old to new.
549 * no optimization based on usage counts. fonttools doesn't appear doing that either.
552 hb_codepoint_t old_num = HB_SET_VALUE_INVALID;
553 while (hb_set_next (closure, &old_num))
556 if (get_population () < 1240)
558 else if (get_population () < 33900)
564 int biased_num (unsigned int old_num) const
566 hb_codepoint_t new_num = get (old_num);
567 return (int)new_num - bias;
578 global_remap.init ();
579 local_remaps.init ();
582 ~subr_remaps_t () { fini (); }
584 void init (unsigned int fdCount)
586 local_remaps.resize (fdCount);
587 for (unsigned int i = 0; i < fdCount; i++)
588 local_remaps[i].init ();
591 void create (subr_closures_t& closures)
593 global_remap.create (closures.global_closure);
594 for (unsigned int i = 0; i < local_remaps.length; i++)
595 local_remaps[i].create (closures.local_closures[i]);
600 global_remap.fini ();
601 local_remaps.fini_deep ();
604 subr_remap_t global_remap;
605 hb_vector_t<subr_remap_t> local_remaps;
608 template <typename SUBSETTER, typename SUBRS, typename ACC, typename ENV, typename OPSET, op_code_t endchar_op=OpCode_Invalid>
609 struct subr_subsetter_t
611 subr_subsetter_t (ACC &acc_, const hb_subset_plan_t *plan_)
612 : acc (acc_), plan (plan_)
614 parsed_charstrings.init ();
615 parsed_global_subrs.init ();
616 parsed_local_subrs.init ();
623 parsed_charstrings.fini_deep ();
624 parsed_global_subrs.fini_deep ();
625 parsed_local_subrs.fini_deep ();
628 /* Subroutine subsetting with --no-desubroutinize runs in phases:
630 * 1. execute charstrings/subroutines to determine subroutine closures
631 * 2. parse out all operators and numbers
632 * 3. mark hint operators and operands for removal if --no-hinting
633 * 4. re-encode all charstrings and subroutines with new subroutine numbers
635 * Phases #1 and #2 are done at the same time in collect_subrs ().
636 * Phase #3 walks charstrings/subroutines forward then backward (hence parsing required),
637 * because we can't tell if a number belongs to a hint op until we see the first moveto.
639 * Assumption: a callsubr/callgsubr operator must immediately follow a (biased) subroutine number
640 * within the same charstring/subroutine, e.g., not split across a charstring and a subroutine.
644 closures.init (acc.fdCount);
645 remaps.init (acc.fdCount);
647 parsed_charstrings.init (plan->num_output_glyphs ());
648 parsed_global_subrs.init (acc.globalSubrs->count);
649 parsed_local_subrs.resize (acc.fdCount);
650 for (unsigned int i = 0; i < acc.fdCount; i++)
652 parsed_local_subrs[i].init (acc.privateDicts[i].localSubrs->count);
654 if (unlikely (!closures.valid))
658 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
660 hb_codepoint_t glyph;
661 if (!plan->old_gid_for_new_gid (i, &glyph))
663 const byte_str_t str = (*acc.charStrings)[glyph];
664 unsigned int fd = acc.fdSelect->get_fd (glyph);
665 if (unlikely (fd >= acc.fdCount))
668 cs_interpreter_t<ENV, OPSET, subr_subset_param_t> interp;
669 interp.env.init (str, acc, fd);
671 subr_subset_param_t param;
672 param.init (&parsed_charstrings[i],
673 &parsed_global_subrs, &parsed_local_subrs[fd],
674 closures.global_closure, closures.local_closures[fd],
677 if (unlikely (!interp.interpret (param)))
680 /* finalize parsed string esp. copy CFF1 width or CFF2 vsindex to the parsed charstring for encoding */
681 SUBSETTER::finalize_parsed_str (interp.env, param, parsed_charstrings[i]);
684 if (plan->drop_hints)
686 /* mark hint ops and arguments for drop */
687 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
689 hb_codepoint_t glyph;
690 if (!plan->old_gid_for_new_gid (i, &glyph))
692 unsigned int fd = acc.fdSelect->get_fd (glyph);
693 if (unlikely (fd >= acc.fdCount))
695 subr_subset_param_t param;
696 param.init (&parsed_charstrings[i],
697 &parsed_global_subrs, &parsed_local_subrs[fd],
698 closures.global_closure, closures.local_closures[fd],
701 drop_hints_param_t drop;
702 if (drop_hints_in_str (parsed_charstrings[i], param, drop))
704 parsed_charstrings[i].set_hint_dropped ();
705 if (drop.vsindex_dropped)
706 parsed_charstrings[i].set_vsindex_dropped ();
710 /* after dropping hints recreate closures of actually used subrs */
712 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
714 hb_codepoint_t glyph;
715 if (!plan->old_gid_for_new_gid (i, &glyph))
717 unsigned int fd = acc.fdSelect->get_fd (glyph);
718 if (unlikely (fd >= acc.fdCount))
720 subr_subset_param_t param;
721 param.init (&parsed_charstrings[i],
722 &parsed_global_subrs, &parsed_local_subrs[fd],
723 closures.global_closure, closures.local_closures[fd],
725 collect_subr_refs_in_str (parsed_charstrings[i], param);
729 remaps.create (closures);
734 bool encode_charstrings (str_buff_vec_t &buffArray) const
736 if (unlikely (!buffArray.resize (plan->num_output_glyphs ())))
738 for (unsigned int i = 0; i < plan->num_output_glyphs (); i++)
740 hb_codepoint_t glyph;
741 if (!plan->old_gid_for_new_gid (i, &glyph))
743 /* add an endchar only charstring for a missing glyph if CFF1 */
744 if (endchar_op != OpCode_Invalid) buffArray[i].push (endchar_op);
747 unsigned int fd = acc.fdSelect->get_fd (glyph);
748 if (unlikely (fd >= acc.fdCount))
750 if (unlikely (!encode_str (parsed_charstrings[i], fd, buffArray[i])))
756 bool encode_subrs (const parsed_cs_str_vec_t &subrs, const subr_remap_t& remap, unsigned int fd, str_buff_vec_t &buffArray) const
758 unsigned int count = remap.get_population ();
760 if (unlikely (!buffArray.resize (count)))
762 for (unsigned int old_num = 0; old_num < subrs.length; old_num++)
764 hb_codepoint_t new_num = remap[old_num];
765 if (new_num != CFF_UNDEF_CODE)
767 if (unlikely (!encode_str (subrs[old_num], fd, buffArray[new_num])))
774 bool encode_globalsubrs (str_buff_vec_t &buffArray)
776 return encode_subrs (parsed_global_subrs, remaps.global_remap, 0, buffArray);
779 bool encode_localsubrs (unsigned int fd, str_buff_vec_t &buffArray) const
781 return encode_subrs (parsed_local_subrs[fd], remaps.local_remaps[fd], fd, buffArray);
785 struct drop_hints_param_t
787 drop_hints_param_t ()
788 : seen_moveto (false),
789 ends_in_hint (false),
791 vsindex_dropped (false) {}
796 bool vsindex_dropped;
799 bool drop_hints_in_subr (parsed_cs_str_t &str, unsigned int pos,
800 parsed_cs_str_vec_t &subrs, unsigned int subr_num,
801 const subr_subset_param_t ¶m, drop_hints_param_t &drop)
803 drop.ends_in_hint = false;
804 bool has_hint = drop_hints_in_str (subrs[subr_num], param, drop);
806 /* if this subr ends with a stem hint (i.e., not a number; potential argument for moveto),
807 * then this entire subroutine must be a hint. drop its call. */
808 if (drop.ends_in_hint)
810 str.values[pos].set_drop ();
811 /* if this subr call is at the end of the parent subr, propagate the flag
812 * otherwise reset the flag */
813 if (!str.at_end (pos))
814 drop.ends_in_hint = false;
816 else if (drop.all_dropped)
818 str.values[pos].set_drop ();
824 /* returns true if it sees a hint op before the first moveto */
825 bool drop_hints_in_str (parsed_cs_str_t &str, const subr_subset_param_t ¶m, drop_hints_param_t &drop)
827 bool seen_hint = false;
829 for (unsigned int pos = 0; pos < str.values.length; pos++)
831 bool has_hint = false;
832 switch (str.values[pos].op)
834 case OpCode_callsubr:
835 has_hint = drop_hints_in_subr (str, pos,
836 *param.parsed_local_subrs, str.values[pos].subr_num,
840 case OpCode_callgsubr:
841 has_hint = drop_hints_in_subr (str, pos,
842 *param.parsed_global_subrs, str.values[pos].subr_num,
849 drop.seen_moveto = true;
852 case OpCode_hintmask:
853 case OpCode_cntrmask:
854 if (drop.seen_moveto)
856 str.values[pos].set_drop ();
866 str.values[pos].set_drop ();
867 if (str.at_end (pos))
868 drop.ends_in_hint = true;
871 case OpCode_dotsection:
872 str.values[pos].set_drop ();
881 for (int i = pos - 1; i >= 0; i--)
883 parsed_cs_op_t &csop = str.values[(unsigned)i];
884 if (csop.for_drop ())
887 if (csop.op == OpCode_vsindexcs)
888 drop.vsindex_dropped = true;
890 seen_hint |= has_hint;
894 /* Raise all_dropped flag if all operators except return are dropped from a subr.
895 * It may happen even after seeing the first moveto if a subr contains
896 * only (usually one) hintmask operator, then calls to this subr can be dropped.
898 drop.all_dropped = true;
899 for (unsigned int pos = 0; pos < str.values.length; pos++)
901 parsed_cs_op_t &csop = str.values[pos];
902 if (csop.op == OpCode_return)
904 if (!csop.for_drop ())
906 drop.all_dropped = false;
914 void collect_subr_refs_in_subr (parsed_cs_str_t &str, unsigned int pos,
915 unsigned int subr_num, parsed_cs_str_vec_t &subrs,
917 const subr_subset_param_t ¶m)
919 closure->add (subr_num);
920 collect_subr_refs_in_str (subrs[subr_num], param);
923 void collect_subr_refs_in_str (parsed_cs_str_t &str, const subr_subset_param_t ¶m)
925 for (unsigned int pos = 0; pos < str.values.length; pos++)
927 if (!str.values[pos].for_drop ())
929 switch (str.values[pos].op)
931 case OpCode_callsubr:
932 collect_subr_refs_in_subr (str, pos,
933 str.values[pos].subr_num, *param.parsed_local_subrs,
934 param.local_closure, param);
937 case OpCode_callgsubr:
938 collect_subr_refs_in_subr (str, pos,
939 str.values[pos].subr_num, *param.parsed_global_subrs,
940 param.global_closure, param);
949 bool encode_str (const parsed_cs_str_t &str, const unsigned int fd, str_buff_t &buff) const
952 str_encoder_t encoder (buff);
954 /* if a prefix (CFF1 width or CFF2 vsindex) has been removed along with hints,
955 * re-insert it at the beginning of charstreing */
956 if (str.has_prefix () && str.is_hint_dropped ())
958 encoder.encode_num (str.prefix_num ());
959 if (str.prefix_op () != OpCode_Invalid)
960 encoder.encode_op (str.prefix_op ());
962 for (unsigned int i = 0; i < str.get_count(); i++)
964 const parsed_cs_op_t &opstr = str.values[i];
965 if (!opstr.for_drop () && !opstr.for_skip ())
969 case OpCode_callsubr:
970 encoder.encode_int (remaps.local_remaps[fd].biased_num (opstr.subr_num));
971 encoder.encode_op (OpCode_callsubr);
974 case OpCode_callgsubr:
975 encoder.encode_int (remaps.global_remap.biased_num (opstr.subr_num));
976 encoder.encode_op (OpCode_callgsubr);
980 encoder.copy_str (opstr.str);
985 return !encoder.is_error ();
990 const hb_subset_plan_t *plan;
992 subr_closures_t closures;
994 parsed_cs_str_vec_t parsed_charstrings;
995 parsed_cs_str_vec_t parsed_global_subrs;
996 hb_vector_t<parsed_cs_str_vec_t> parsed_local_subrs;
998 subr_remaps_t remaps;
1001 typedef typename SUBRS::count_type subr_count_type;
1004 } /* namespace CFF */
1007 hb_plan_subset_cff_fdselect (const hb_subset_plan_t *plan,
1008 unsigned int fdCount,
1009 const CFF::FDSelect &src, /* IN */
1010 unsigned int &subset_fd_count /* OUT */,
1011 unsigned int &subset_fdselect_size /* OUT */,
1012 unsigned int &subset_fdselect_format /* OUT */,
1013 hb_vector_t<CFF::code_pair_t> &fdselect_ranges /* OUT */,
1014 hb_inc_bimap_t &fdmap /* OUT */);
1017 hb_serialize_cff_fdselect (hb_serialize_context_t *c,
1018 unsigned int num_glyphs,
1019 const CFF::FDSelect &src,
1020 unsigned int fd_count,
1021 unsigned int fdselect_format,
1023 const hb_vector_t<CFF::code_pair_t> &fdselect_ranges);
1025 #endif /* HB_SUBSET_CFF_COMMON_HH */