diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-cff2.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-cff2.cc | 488 |
1 files changed, 0 insertions, 488 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-cff2.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-cff2.cc deleted file mode 100644 index 17ee040deb6..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-cff2.cc +++ /dev/null @@ -1,488 +0,0 @@ -/* - * 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 - */ - -#include "hb.hh" - -#ifndef HB_NO_SUBSET_CFF - -#include "hb-open-type.hh" -#include "hb-ot-cff2-table.hh" -#include "hb-set.h" -#include "hb-subset-cff2.hh" -#include "hb-subset-plan.hh" -#include "hb-subset-cff-common.hh" -#include "hb-cff2-interp-cs.hh" - -using namespace CFF; - -struct cff2_sub_table_info_t : cff_sub_table_info_t -{ - cff2_sub_table_info_t () - : cff_sub_table_info_t (), - var_store_link (0) - {} - - objidx_t var_store_link; -}; - -struct cff2_top_dict_op_serializer_t : cff_top_dict_op_serializer_t<> -{ - bool serialize (hb_serialize_context_t *c, - const op_str_t &opstr, - const cff2_sub_table_info_t &info) const - { - TRACE_SERIALIZE (this); - - switch (opstr.op) - { - case OpCode_vstore: - return_trace (FontDict::serialize_link4_op(c, opstr.op, info.var_store_link)); - - default: - return_trace (cff_top_dict_op_serializer_t<>::serialize (c, opstr, info)); - } - } -}; - -struct cff2_cs_opset_flatten_t : cff2_cs_opset_t<cff2_cs_opset_flatten_t, flatten_param_t> -{ - static void flush_args_and_op (op_code_t op, cff2_cs_interp_env_t &env, flatten_param_t& param) - { - switch (op) - { - case OpCode_return: - case OpCode_endchar: - /* dummy opcodes in CFF2. ignore */ - break; - - case OpCode_hstem: - case OpCode_hstemhm: - case OpCode_vstem: - case OpCode_vstemhm: - case OpCode_hintmask: - case OpCode_cntrmask: - if (param.drop_hints) - { - env.clear_args (); - return; - } - HB_FALLTHROUGH; - - default: - SUPER::flush_args_and_op (op, env, param); - break; - } - } - - static void flush_args (cff2_cs_interp_env_t &env, flatten_param_t& param) - { - for (unsigned int i = 0; i < env.argStack.get_count ();) - { - const blend_arg_t &arg = env.argStack[i]; - if (arg.blending ()) - { - if (unlikely (!((arg.numValues > 0) && (env.argStack.get_count () >= arg.numValues)))) - { - env.set_error (); - return; - } - flatten_blends (arg, i, env, param); - i += arg.numValues; - } - else - { - str_encoder_t encoder (param.flatStr); - encoder.encode_num (arg); - i++; - } - } - SUPER::flush_args (env, param); - } - - static void flatten_blends (const blend_arg_t &arg, unsigned int i, cff2_cs_interp_env_t &env, flatten_param_t& param) - { - /* flatten the default values */ - str_encoder_t encoder (param.flatStr); - for (unsigned int j = 0; j < arg.numValues; j++) - { - const blend_arg_t &arg1 = env.argStack[i + j]; - if (unlikely (!((arg1.blending () && (arg.numValues == arg1.numValues) && (arg1.valueIndex == j) && - (arg1.deltas.length == env.get_region_count ()))))) - { - env.set_error (); - return; - } - encoder.encode_num (arg1); - } - /* flatten deltas for each value */ - for (unsigned int j = 0; j < arg.numValues; j++) - { - const blend_arg_t &arg1 = env.argStack[i + j]; - for (unsigned int k = 0; k < arg1.deltas.length; k++) - encoder.encode_num (arg1.deltas[k]); - } - /* flatten the number of values followed by blend operator */ - encoder.encode_int (arg.numValues); - encoder.encode_op (OpCode_blendcs); - } - - static void flush_op (op_code_t op, cff2_cs_interp_env_t &env, flatten_param_t& param) - { - switch (op) - { - case OpCode_return: - case OpCode_endchar: - return; - default: - str_encoder_t encoder (param.flatStr); - encoder.encode_op (op); - } - } - - private: - typedef cff2_cs_opset_t<cff2_cs_opset_flatten_t, flatten_param_t> SUPER; - typedef cs_opset_t<blend_arg_t, cff2_cs_opset_flatten_t, cff2_cs_opset_flatten_t, cff2_cs_interp_env_t, flatten_param_t> CSOPSET; -}; - -struct cff2_cs_opset_subr_subset_t : cff2_cs_opset_t<cff2_cs_opset_subr_subset_t, subr_subset_param_t> -{ - static void process_op (op_code_t op, cff2_cs_interp_env_t &env, subr_subset_param_t& param) - { - switch (op) { - - case OpCode_return: - param.current_parsed_str->set_parsed (); - env.return_from_subr (); - param.set_current_str (env, false); - break; - - case OpCode_endchar: - param.current_parsed_str->set_parsed (); - SUPER::process_op (op, env, param); - break; - - case OpCode_callsubr: - process_call_subr (op, CSType_LocalSubr, env, param, env.localSubrs, param.local_closure); - break; - - case OpCode_callgsubr: - process_call_subr (op, CSType_GlobalSubr, env, param, env.globalSubrs, param.global_closure); - break; - - default: - SUPER::process_op (op, env, param); - param.current_parsed_str->add_op (op, env.str_ref); - break; - } - } - - protected: - static void process_call_subr (op_code_t op, cs_type_t type, - cff2_cs_interp_env_t &env, subr_subset_param_t& param, - cff2_biased_subrs_t& subrs, hb_set_t *closure) - { - byte_str_ref_t str_ref = env.str_ref; - env.call_subr (subrs, type); - param.current_parsed_str->add_call_op (op, str_ref, env.context.subr_num); - closure->add (env.context.subr_num); - param.set_current_str (env, true); - } - - private: - typedef cff2_cs_opset_t<cff2_cs_opset_subr_subset_t, subr_subset_param_t> SUPER; -}; - -struct cff2_subr_subsetter_t : subr_subsetter_t<cff2_subr_subsetter_t, CFF2Subrs, const OT::cff2::accelerator_subset_t, cff2_cs_interp_env_t, cff2_cs_opset_subr_subset_t> -{ - cff2_subr_subsetter_t (const OT::cff2::accelerator_subset_t &acc_, const hb_subset_plan_t *plan_) - : subr_subsetter_t (acc_, plan_) {} - - static void complete_parsed_str (cff2_cs_interp_env_t &env, subr_subset_param_t& param, parsed_cs_str_t &charstring) - { - /* vsindex is inserted at the beginning of the charstring as necessary */ - if (env.seen_vsindex ()) - { - number_t ivs; - ivs.set_int ((int)env.get_ivs ()); - charstring.set_prefix (ivs, OpCode_vsindexcs); - } - } -}; - -struct cff2_subset_plan { - cff2_subset_plan () - : orig_fdcount (0), - subset_fdcount(1), - subset_fdselect_size (0), - subset_fdselect_format (0), - drop_hints (false), - desubroutinize (false) - { - subset_fdselect_ranges.init (); - fdmap.init (); - subset_charstrings.init (); - subset_globalsubrs.init (); - subset_localsubrs.init (); - } - - ~cff2_subset_plan () - { - subset_fdselect_ranges.fini (); - fdmap.fini (); - subset_charstrings.fini_deep (); - subset_globalsubrs.fini_deep (); - subset_localsubrs.fini_deep (); - } - - bool create (const OT::cff2::accelerator_subset_t &acc, - hb_subset_plan_t *plan) - { - orig_fdcount = acc.fdArray->count; - - drop_hints = plan->drop_hints; - desubroutinize = plan->desubroutinize; - - if (desubroutinize) - { - /* Flatten global & local subrs */ - subr_flattener_t<const OT::cff2::accelerator_subset_t, cff2_cs_interp_env_t, cff2_cs_opset_flatten_t> - flattener(acc, plan); - if (!flattener.flatten (subset_charstrings)) - return false; - } - else - { - cff2_subr_subsetter_t subr_subsetter (acc, plan); - - /* Subset subrs: collect used subroutines, leaving all unused ones behind */ - if (!subr_subsetter.subset ()) - return false; - - /* encode charstrings, global subrs, local subrs with new subroutine numbers */ - if (!subr_subsetter.encode_charstrings (subset_charstrings)) - return false; - - if (!subr_subsetter.encode_globalsubrs (subset_globalsubrs)) - return false; - - /* local subrs */ - if (!subset_localsubrs.resize (orig_fdcount)) - return false; - for (unsigned int fd = 0; fd < orig_fdcount; fd++) - { - subset_localsubrs[fd].init (); - if (!subr_subsetter.encode_localsubrs (fd, subset_localsubrs[fd])) - return false; - } - } - - /* FDSelect */ - if (acc.fdSelect != &Null (CFF2FDSelect)) - { - if (unlikely (!hb_plan_subset_cff_fdselect (plan, - orig_fdcount, - *(const FDSelect *)acc.fdSelect, - subset_fdcount, - subset_fdselect_size, - subset_fdselect_format, - subset_fdselect_ranges, - fdmap))) - return false; - } - else - fdmap.identity (1); - - return true; - } - - cff2_sub_table_info_t info; - - unsigned int orig_fdcount; - unsigned int subset_fdcount; - unsigned int subset_fdselect_size; - unsigned int subset_fdselect_format; - hb_vector_t<code_pair_t> subset_fdselect_ranges; - - hb_inc_bimap_t fdmap; - - str_buff_vec_t subset_charstrings; - str_buff_vec_t subset_globalsubrs; - hb_vector_t<str_buff_vec_t> subset_localsubrs; - - bool drop_hints; - bool desubroutinize; -}; - -static bool _serialize_cff2 (hb_serialize_context_t *c, - cff2_subset_plan &plan, - const OT::cff2::accelerator_subset_t &acc, - unsigned int num_glyphs) -{ - /* private dicts & local subrs */ - hb_vector_t<table_info_t> private_dict_infos; - if (unlikely (!private_dict_infos.resize (plan.subset_fdcount))) return false; - - for (int i = (int)acc.privateDicts.length; --i >= 0 ;) - { - if (plan.fdmap.has (i)) - { - objidx_t subrs_link = 0; - - if (plan.subset_localsubrs[i].length > 0) - { - CFF2Subrs *dest = c->start_embed <CFF2Subrs> (); - if (unlikely (!dest)) return false; - c->push (); - if (likely (dest->serialize (c, plan.subset_localsubrs[i]))) - subrs_link = c->pop_pack (); - else - { - c->pop_discard (); - return false; - } - } - PrivateDict *pd = c->start_embed<PrivateDict> (); - if (unlikely (!pd)) return false; - c->push (); - cff_private_dict_op_serializer_t privSzr (plan.desubroutinize, plan.drop_hints); - if (likely (pd->serialize (c, acc.privateDicts[i], privSzr, subrs_link))) - { - unsigned fd = plan.fdmap[i]; - private_dict_infos[fd].size = c->length (); - private_dict_infos[fd].link = c->pop_pack (); - } - else - { - c->pop_discard (); - return false; - } - } - } - - /* CharStrings */ - { - CFF2CharStrings *cs = c->start_embed<CFF2CharStrings> (); - if (unlikely (!cs)) return false; - c->push (); - if (likely (cs->serialize (c, plan.subset_charstrings))) - plan.info.char_strings_link = c->pop_pack (); - else - { - c->pop_discard (); - return false; - } - } - - /* FDSelect */ - if (acc.fdSelect != &Null (CFF2FDSelect)) - { - c->push (); - if (likely (hb_serialize_cff_fdselect (c, num_glyphs, *(const FDSelect *)acc.fdSelect, plan.orig_fdcount, - plan.subset_fdselect_format, plan.subset_fdselect_size, - plan.subset_fdselect_ranges))) - plan.info.fd_select.link = c->pop_pack (); - else - { - c->pop_discard (); - return false; - } - } - - /* FDArray (FD Index) */ - { - c->push (); - CFF2FDArray *fda = c->start_embed<CFF2FDArray> (); - if (unlikely (!fda)) return false; - cff_font_dict_op_serializer_t fontSzr; - auto it = - + hb_zip (+ hb_iter (acc.fontDicts) - | hb_filter ([&] (const cff2_font_dict_values_t &_) - { return plan.fdmap.has (&_ - &acc.fontDicts[0]); }), - hb_iter (private_dict_infos)) - ; - if (unlikely (!fda->serialize (c, it, fontSzr))) return false; - plan.info.fd_array_link = c->pop_pack (); - } - - /* variation store */ - if (acc.varStore != &Null (CFF2VariationStore)) - { - c->push (); - CFF2VariationStore *dest = c->start_embed<CFF2VariationStore> (); - if (unlikely (!dest || !dest->serialize (c, acc.varStore))) return false; - plan.info.var_store_link = c->pop_pack (); - } - - OT::cff2 *cff2 = c->allocate_min<OT::cff2> (); - if (unlikely (!cff2)) return false; - - /* header */ - cff2->version.major = 0x02; - cff2->version.minor = 0x00; - cff2->topDict = OT::cff2::static_size; - - /* top dict */ - { - TopDict &dict = cff2 + cff2->topDict; - cff2_top_dict_op_serializer_t topSzr; - if (unlikely (!dict.serialize (c, acc.topDict, topSzr, plan.info))) return false; - cff2->topDictSize = c->head - (const char *)&dict; - } - - /* global subrs */ - { - CFF2Subrs *dest = c->start_embed <CFF2Subrs> (); - if (unlikely (!dest)) return false; - return dest->serialize (c, plan.subset_globalsubrs); - } -} - -static bool -_hb_subset_cff2 (const OT::cff2::accelerator_subset_t &acc, - hb_subset_context_t *c) -{ - cff2_subset_plan cff2_plan; - - if (unlikely (!cff2_plan.create (acc, c->plan))) return false; - return _serialize_cff2 (c->serializer, cff2_plan, acc, c->plan->num_output_glyphs ()); -} - -/** - * hb_subset_cff2: - * Subsets the CFF2 table according to a provided subset context. - **/ -bool -hb_subset_cff2 (hb_subset_context_t *c) -{ - OT::cff2::accelerator_subset_t acc; - acc.init (c->plan->source); - bool result = likely (acc.is_valid ()) && _hb_subset_cff2 (acc, c); - acc.fini (); - - return result; -} - -#endif |