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-rw-r--r--gfx/harfbuzz/src/hb-subset-cff1.cc940
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diff --git a/gfx/harfbuzz/src/hb-subset-cff1.cc b/gfx/harfbuzz/src/hb-subset-cff1.cc
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+++ b/gfx/harfbuzz/src/hb-subset-cff1.cc
@@ -0,0 +1,940 @@
+/*
+ * 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-cff1-table.hh"
+#include "hb-set.h"
+#include "hb-bimap.hh"
+#include "hb-subset-cff1.hh"
+#include "hb-subset-plan.hh"
+#include "hb-subset-cff-common.hh"
+#include "hb-cff1-interp-cs.hh"
+
+using namespace CFF;
+
+struct remap_sid_t : hb_inc_bimap_t
+{
+ unsigned int add (unsigned int sid)
+ {
+ if ((sid != CFF_UNDEF_SID) && !is_std_std (sid))
+ return offset_sid (hb_inc_bimap_t::add (unoffset_sid (sid)));
+ else
+ return sid;
+ }
+
+ unsigned int operator[] (unsigned int sid) const
+ {
+ if (is_std_std (sid) || (sid == CFF_UNDEF_SID))
+ return sid;
+ else
+ return offset_sid (get (unoffset_sid (sid)));
+ }
+
+ static const unsigned int num_std_strings = 391;
+
+ static bool is_std_std (unsigned int sid) { return sid < num_std_strings; }
+ static unsigned int offset_sid (unsigned int sid) { return sid + num_std_strings; }
+ static unsigned int unoffset_sid (unsigned int sid) { return sid - num_std_strings; }
+};
+
+struct cff1_sub_table_info_t : cff_sub_table_info_t
+{
+ cff1_sub_table_info_t ()
+ : cff_sub_table_info_t (),
+ encoding_link (0),
+ charset_link (0)
+ {
+ privateDictInfo.init ();
+ }
+
+ objidx_t encoding_link;
+ objidx_t charset_link;
+ table_info_t privateDictInfo;
+};
+
+/* a copy of a parsed out cff1_top_dict_values_t augmented with additional operators */
+struct cff1_top_dict_values_mod_t : cff1_top_dict_values_t
+{
+ void init (const cff1_top_dict_values_t *base_= &Null (cff1_top_dict_values_t))
+ {
+ SUPER::init ();
+ base = base_;
+ }
+
+ void fini () { SUPER::fini (); }
+
+ unsigned get_count () const { return base->get_count () + SUPER::get_count (); }
+ const cff1_top_dict_val_t &get_value (unsigned int i) const
+ {
+ if (i < base->get_count ())
+ return (*base)[i];
+ else
+ return SUPER::values[i - base->get_count ()];
+ }
+ const cff1_top_dict_val_t &operator [] (unsigned int i) const { return get_value (i); }
+
+ void reassignSIDs (const remap_sid_t& sidmap)
+ {
+ for (unsigned int i = 0; i < name_dict_values_t::ValCount; i++)
+ nameSIDs[i] = sidmap[base->nameSIDs[i]];
+ }
+
+ protected:
+ typedef cff1_top_dict_values_t SUPER;
+ const cff1_top_dict_values_t *base;
+};
+
+struct top_dict_modifiers_t
+{
+ top_dict_modifiers_t (const cff1_sub_table_info_t &info_,
+ const unsigned int (&nameSIDs_)[name_dict_values_t::ValCount])
+ : info (info_),
+ nameSIDs (nameSIDs_)
+ {}
+
+ const cff1_sub_table_info_t &info;
+ const unsigned int (&nameSIDs)[name_dict_values_t::ValCount];
+};
+
+struct cff1_top_dict_op_serializer_t : cff_top_dict_op_serializer_t<cff1_top_dict_val_t>
+{
+ bool serialize (hb_serialize_context_t *c,
+ const cff1_top_dict_val_t &opstr,
+ const top_dict_modifiers_t &mod) const
+ {
+ TRACE_SERIALIZE (this);
+
+ op_code_t op = opstr.op;
+ switch (op)
+ {
+ case OpCode_charset:
+ if (mod.info.charset_link)
+ return_trace (FontDict::serialize_link4_op(c, op, mod.info.charset_link, whence_t::Absolute));
+ else
+ goto fall_back;
+
+ case OpCode_Encoding:
+ if (mod.info.encoding_link)
+ return_trace (FontDict::serialize_link4_op(c, op, mod.info.encoding_link, whence_t::Absolute));
+ else
+ goto fall_back;
+
+ case OpCode_Private:
+ return_trace (UnsizedByteStr::serialize_int2 (c, mod.info.privateDictInfo.size) &&
+ Dict::serialize_link4_op (c, op, mod.info.privateDictInfo.link, whence_t::Absolute));
+
+ case OpCode_version:
+ case OpCode_Notice:
+ case OpCode_Copyright:
+ case OpCode_FullName:
+ case OpCode_FamilyName:
+ case OpCode_Weight:
+ case OpCode_PostScript:
+ case OpCode_BaseFontName:
+ case OpCode_FontName:
+ return_trace (FontDict::serialize_int2_op (c, op, mod.nameSIDs[name_dict_values_t::name_op_to_index (op)]));
+
+ case OpCode_ROS:
+ {
+ /* for registry & ordering, reassigned SIDs are serialized
+ * for supplement, the original byte string is copied along with the op code */
+ op_str_t supp_op;
+ supp_op.op = op;
+ if ( unlikely (!(opstr.str.length >= opstr.last_arg_offset + 3)))
+ return_trace (false);
+ supp_op.str = byte_str_t (&opstr.str + opstr.last_arg_offset, opstr.str.length - opstr.last_arg_offset);
+ return_trace (UnsizedByteStr::serialize_int2 (c, mod.nameSIDs[name_dict_values_t::registry]) &&
+ UnsizedByteStr::serialize_int2 (c, mod.nameSIDs[name_dict_values_t::ordering]) &&
+ copy_opstr (c, supp_op));
+ }
+ fall_back:
+ default:
+ return_trace (cff_top_dict_op_serializer_t<cff1_top_dict_val_t>::serialize (c, opstr, mod.info));
+ }
+ return_trace (true);
+ }
+
+};
+
+struct cff1_font_dict_op_serializer_t : cff_font_dict_op_serializer_t
+{
+ bool serialize (hb_serialize_context_t *c,
+ const op_str_t &opstr,
+ const cff1_font_dict_values_mod_t &mod) const
+ {
+ TRACE_SERIALIZE (this);
+
+ if (opstr.op == OpCode_FontName)
+ return_trace (FontDict::serialize_int2_op (c, opstr.op, mod.fontName));
+ else
+ return_trace (SUPER::serialize (c, opstr, mod.privateDictInfo));
+ }
+
+ private:
+ typedef cff_font_dict_op_serializer_t SUPER;
+};
+
+struct cff1_cs_opset_flatten_t : cff1_cs_opset_t<cff1_cs_opset_flatten_t, flatten_param_t>
+{
+ static void flush_args_and_op (op_code_t op, cff1_cs_interp_env_t &env, flatten_param_t& param)
+ {
+ if (env.arg_start > 0)
+ flush_width (env, param);
+
+ switch (op)
+ {
+ case OpCode_hstem:
+ case OpCode_hstemhm:
+ case OpCode_vstem:
+ case OpCode_vstemhm:
+ case OpCode_hintmask:
+ case OpCode_cntrmask:
+ case OpCode_dotsection:
+ if (param.drop_hints)
+ {
+ env.clear_args ();
+ return;
+ }
+ HB_FALLTHROUGH;
+
+ default:
+ SUPER::flush_args_and_op (op, env, param);
+ break;
+ }
+ }
+ static void flush_args (cff1_cs_interp_env_t &env, flatten_param_t& param)
+ {
+ str_encoder_t encoder (param.flatStr);
+ for (unsigned int i = env.arg_start; i < env.argStack.get_count (); i++)
+ encoder.encode_num (env.eval_arg (i));
+ SUPER::flush_args (env, param);
+ }
+
+ static void flush_op (op_code_t op, cff1_cs_interp_env_t &env, flatten_param_t& param)
+ {
+ str_encoder_t encoder (param.flatStr);
+ encoder.encode_op (op);
+ }
+
+ static void flush_width (cff1_cs_interp_env_t &env, flatten_param_t& param)
+ {
+ assert (env.has_width);
+ str_encoder_t encoder (param.flatStr);
+ encoder.encode_num (env.width);
+ }
+
+ static void flush_hintmask (op_code_t op, cff1_cs_interp_env_t &env, flatten_param_t& param)
+ {
+ SUPER::flush_hintmask (op, env, param);
+ if (!param.drop_hints)
+ {
+ str_encoder_t encoder (param.flatStr);
+ for (unsigned int i = 0; i < env.hintmask_size; i++)
+ encoder.encode_byte (env.str_ref[i]);
+ }
+ }
+
+ private:
+ typedef cff1_cs_opset_t<cff1_cs_opset_flatten_t, flatten_param_t> SUPER;
+};
+
+struct range_list_t : hb_vector_t<code_pair_t>
+{
+ /* replace the first glyph ID in the "glyph" field each range with a nLeft value */
+ bool complete (unsigned int last_glyph)
+ {
+ bool two_byte = false;
+ for (unsigned int i = (*this).length; i > 0; i--)
+ {
+ code_pair_t &pair = (*this)[i - 1];
+ unsigned int nLeft = last_glyph - pair.glyph - 1;
+ if (nLeft >= 0x100)
+ two_byte = true;
+ last_glyph = pair.glyph;
+ pair.glyph = nLeft;
+ }
+ return two_byte;
+ }
+};
+
+struct cff1_cs_opset_subr_subset_t : cff1_cs_opset_t<cff1_cs_opset_subr_subset_t, subr_subset_param_t>
+{
+ static void process_op (op_code_t op, cff1_cs_interp_env_t &env, subr_subset_param_t& param)
+ {
+ switch (op) {
+
+ case OpCode_return:
+ param.current_parsed_str->add_op (op, env.str_ref);
+ param.current_parsed_str->set_parsed ();
+ env.return_from_subr ();
+ param.set_current_str (env, false);
+ break;
+
+ case OpCode_endchar:
+ param.current_parsed_str->add_op (op, env.str_ref);
+ 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,
+ cff1_cs_interp_env_t &env, subr_subset_param_t& param,
+ cff1_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 cff1_cs_opset_t<cff1_cs_opset_subr_subset_t, subr_subset_param_t> SUPER;
+};
+
+struct cff1_subr_subsetter_t : subr_subsetter_t<cff1_subr_subsetter_t, CFF1Subrs, const OT::cff1::accelerator_subset_t, cff1_cs_interp_env_t, cff1_cs_opset_subr_subset_t, OpCode_endchar>
+{
+ cff1_subr_subsetter_t (const OT::cff1::accelerator_subset_t &acc_, const hb_subset_plan_t *plan_)
+ : subr_subsetter_t (acc_, plan_) {}
+
+ static void complete_parsed_str (cff1_cs_interp_env_t &env, subr_subset_param_t& param, parsed_cs_str_t &charstring)
+ {
+ /* insert width at the beginning of the charstring as necessary */
+ if (env.has_width)
+ charstring.set_prefix (env.width);
+
+ /* subroutines/charstring left on the call stack are legally left unmarked
+ * unmarked when a subroutine terminates with endchar. mark them.
+ */
+ param.current_parsed_str->set_parsed ();
+ for (unsigned int i = 0; i < env.callStack.get_count (); i++)
+ {
+ parsed_cs_str_t *parsed_str = param.get_parsed_str_for_context (env.callStack[i]);
+ if (likely (parsed_str))
+ parsed_str->set_parsed ();
+ else
+ env.set_error ();
+ }
+ }
+};
+
+struct cff_subset_plan {
+ cff_subset_plan ()
+ : info (),
+ orig_fdcount (0),
+ subset_fdcount (1),
+ subset_fdselect_format (0),
+ drop_hints (false),
+ desubroutinize(false)
+ {
+ topdict_mod.init ();
+ subset_fdselect_ranges.init ();
+ fdmap.init ();
+ subset_charstrings.init ();
+ subset_globalsubrs.init ();
+ subset_localsubrs.init ();
+ fontdicts_mod.init ();
+ subset_enc_code_ranges.init ();
+ subset_enc_supp_codes.init ();
+ subset_charset_ranges.init ();
+ sidmap.init ();
+ for (unsigned int i = 0; i < name_dict_values_t::ValCount; i++)
+ topDictModSIDs[i] = CFF_UNDEF_SID;
+ }
+
+ ~cff_subset_plan ()
+ {
+ topdict_mod.fini ();
+ subset_fdselect_ranges.fini ();
+ fdmap.fini ();
+ subset_charstrings.fini_deep ();
+ subset_globalsubrs.fini_deep ();
+ subset_localsubrs.fini_deep ();
+ fontdicts_mod.fini ();
+ subset_enc_code_ranges.fini ();
+ subset_enc_supp_codes.fini ();
+ subset_charset_ranges.fini ();
+ sidmap.fini ();
+ }
+
+ void plan_subset_encoding (const OT::cff1::accelerator_subset_t &acc, hb_subset_plan_t *plan)
+ {
+ const Encoding *encoding = acc.encoding;
+ unsigned int size0, size1, supp_size;
+ hb_codepoint_t code, last_code = CFF_UNDEF_CODE;
+ hb_vector_t<hb_codepoint_t> supp_codes;
+
+ if (unlikely (!subset_enc_code_ranges.resize (0)))
+ {
+ plan->check_success (false);
+ return;
+ }
+
+ supp_size = 0;
+ supp_codes.init ();
+
+ subset_enc_num_codes = plan->num_output_glyphs () - 1;
+ unsigned int glyph;
+ for (glyph = 1; glyph < plan->num_output_glyphs (); glyph++)
+ {
+ hb_codepoint_t old_glyph;
+ if (!plan->old_gid_for_new_gid (glyph, &old_glyph))
+ {
+ /* Retain the code for the old missing glyph ID */
+ old_glyph = glyph;
+ }
+ code = acc.glyph_to_code (old_glyph);
+ if (code == CFF_UNDEF_CODE)
+ {
+ subset_enc_num_codes = glyph - 1;
+ break;
+ }
+
+ if ((last_code == CFF_UNDEF_CODE) || (code != last_code + 1))
+ {
+ code_pair_t pair = { code, glyph };
+ subset_enc_code_ranges.push (pair);
+ }
+ last_code = code;
+
+ if (encoding != &Null (Encoding))
+ {
+ hb_codepoint_t sid = acc.glyph_to_sid (old_glyph);
+ encoding->get_supplement_codes (sid, supp_codes);
+ for (unsigned int i = 0; i < supp_codes.length; i++)
+ {
+ code_pair_t pair = { supp_codes[i], sid };
+ subset_enc_supp_codes.push (pair);
+ }
+ supp_size += SuppEncoding::static_size * supp_codes.length;
+ }
+ }
+ supp_codes.fini ();
+
+ subset_enc_code_ranges.complete (glyph);
+
+ assert (subset_enc_num_codes <= 0xFF);
+ size0 = Encoding0::min_size + HBUINT8::static_size * subset_enc_num_codes;
+ size1 = Encoding1::min_size + Encoding1_Range::static_size * subset_enc_code_ranges.length;
+
+ if (size0 < size1)
+ subset_enc_format = 0;
+ else
+ subset_enc_format = 1;
+ }
+
+ void plan_subset_charset (const OT::cff1::accelerator_subset_t &acc, hb_subset_plan_t *plan)
+ {
+ unsigned int size0, size_ranges;
+ hb_codepoint_t sid, last_sid = CFF_UNDEF_CODE;
+
+ if (unlikely (!subset_charset_ranges.resize (0)))
+ {
+ plan->check_success (false);
+ return;
+ }
+
+ unsigned int glyph;
+ for (glyph = 1; glyph < plan->num_output_glyphs (); glyph++)
+ {
+ hb_codepoint_t old_glyph;
+ if (!plan->old_gid_for_new_gid (glyph, &old_glyph))
+ {
+ /* Retain the SID for the old missing glyph ID */
+ old_glyph = glyph;
+ }
+ sid = acc.glyph_to_sid (old_glyph);
+
+ if (!acc.is_CID ())
+ sid = sidmap.add (sid);
+
+ if ((last_sid == CFF_UNDEF_CODE) || (sid != last_sid + 1))
+ {
+ code_pair_t pair = { sid, glyph };
+ subset_charset_ranges.push (pair);
+ }
+ last_sid = sid;
+ }
+
+ bool two_byte = subset_charset_ranges.complete (glyph);
+
+ size0 = Charset0::min_size + HBUINT16::static_size * (plan->num_output_glyphs () - 1);
+ if (!two_byte)
+ size_ranges = Charset1::min_size + Charset1_Range::static_size * subset_charset_ranges.length;
+ else
+ size_ranges = Charset2::min_size + Charset2_Range::static_size * subset_charset_ranges.length;
+
+ if (size0 < size_ranges)
+ subset_charset_format = 0;
+ else if (!two_byte)
+ subset_charset_format = 1;
+ else
+ subset_charset_format = 2;
+ }
+
+ bool collect_sids_in_dicts (const OT::cff1::accelerator_subset_t &acc)
+ {
+ sidmap.reset ();
+
+ for (unsigned int i = 0; i < name_dict_values_t::ValCount; i++)
+ {
+ unsigned int sid = acc.topDict.nameSIDs[i];
+ if (sid != CFF_UNDEF_SID)
+ {
+ (void)sidmap.add (sid);
+ topDictModSIDs[i] = sidmap[sid];
+ }
+ }
+
+ if (acc.fdArray != &Null (CFF1FDArray))
+ for (unsigned int i = 0; i < orig_fdcount; i++)
+ if (fdmap.has (i))
+ (void)sidmap.add (acc.fontDicts[i].fontName);
+
+ return true;
+ }
+
+ bool create (const OT::cff1::accelerator_subset_t &acc,
+ hb_subset_plan_t *plan)
+ {
+ /* make sure notdef is first */
+ hb_codepoint_t old_glyph;
+ if (!plan->old_gid_for_new_gid (0, &old_glyph) || (old_glyph != 0)) return false;
+
+ num_glyphs = plan->num_output_glyphs ();
+ orig_fdcount = acc.fdCount;
+ drop_hints = plan->drop_hints;
+ desubroutinize = plan->desubroutinize;
+
+ /* check whether the subset renumbers any glyph IDs */
+ gid_renum = false;
+ for (hb_codepoint_t new_glyph = 0; new_glyph < plan->num_output_glyphs (); new_glyph++)
+ {
+ if (!plan->old_gid_for_new_gid(new_glyph, &old_glyph))
+ continue;
+ if (new_glyph != old_glyph) {
+ gid_renum = true;
+ break;
+ }
+ }
+
+ subset_charset = gid_renum || !acc.is_predef_charset ();
+ subset_encoding = !acc.is_CID() && !acc.is_predef_encoding ();
+
+ /* top dict INDEX */
+ {
+ /* Add encoding/charset to a (copy of) top dict as necessary */
+ topdict_mod.init (&acc.topDict);
+ bool need_to_add_enc = (subset_encoding && !acc.topDict.has_op (OpCode_Encoding));
+ bool need_to_add_set = (subset_charset && !acc.topDict.has_op (OpCode_charset));
+ if (need_to_add_enc || need_to_add_set)
+ {
+ if (need_to_add_enc)
+ topdict_mod.add_op (OpCode_Encoding);
+ if (need_to_add_set)
+ topdict_mod.add_op (OpCode_charset);
+ }
+ }
+
+ /* Determine re-mapping of font index as fdmap among other info */
+ if (acc.fdSelect != &Null (CFF1FDSelect))
+ {
+ if (unlikely (!hb_plan_subset_cff_fdselect (plan,
+ orig_fdcount,
+ *acc.fdSelect,
+ subset_fdcount,
+ info.fd_select.size,
+ subset_fdselect_format,
+ subset_fdselect_ranges,
+ fdmap)))
+ return false;
+ }
+ else
+ fdmap.identity (1);
+
+ /* remove unused SIDs & reassign SIDs */
+ {
+ /* SIDs for name strings in dicts are added before glyph names so they fit in 16-bit int range */
+ if (unlikely (!collect_sids_in_dicts (acc)))
+ return false;
+ if (unlikely (sidmap.get_population () > 0x8000)) /* assumption: a dict won't reference that many strings */
+ return false;
+
+ if (subset_charset) plan_subset_charset (acc, plan);
+
+ topdict_mod.reassignSIDs (sidmap);
+ }
+
+ if (desubroutinize)
+ {
+ /* Flatten global & local subrs */
+ subr_flattener_t<const OT::cff1::accelerator_subset_t, cff1_cs_interp_env_t, cff1_cs_opset_flatten_t, OpCode_endchar>
+ flattener(acc, plan);
+ if (!flattener.flatten (subset_charstrings))
+ return false;
+ }
+ else
+ {
+ cff1_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 (fdmap.has (fd))
+ {
+ if (!subr_subsetter.encode_localsubrs (fd, subset_localsubrs[fd]))
+ return false;
+ }
+ }
+ }
+
+ /* Encoding */
+ if (subset_encoding)
+ plan_subset_encoding (acc, plan);
+
+ /* private dicts & local subrs */
+ if (!acc.is_CID ())
+ fontdicts_mod.push (cff1_font_dict_values_mod_t ());
+ else
+ {
+ + hb_iter (acc.fontDicts)
+ | hb_filter ([&] (const cff1_font_dict_values_t &_)
+ { return fdmap.has (&_ - &acc.fontDicts[0]); } )
+ | hb_map ([&] (const cff1_font_dict_values_t &_)
+ {
+ cff1_font_dict_values_mod_t mod;
+ mod.init (&_, sidmap[_.fontName]);
+ return mod;
+ })
+ | hb_sink (fontdicts_mod)
+ ;
+ }
+
+ return ((subset_charstrings.length == plan->num_output_glyphs ())
+ && (fontdicts_mod.length == subset_fdcount));
+ }
+
+ cff1_top_dict_values_mod_t topdict_mod;
+ cff1_sub_table_info_t info;
+
+ unsigned int num_glyphs;
+ unsigned int orig_fdcount;
+ unsigned int subset_fdcount;
+ unsigned int subset_fdselect_format;
+ hb_vector_t<code_pair_t> subset_fdselect_ranges;
+
+ /* font dict index remap table from fullset FDArray to subset FDArray.
+ * set to CFF_UNDEF_CODE if excluded from subset */
+ 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;
+ hb_vector_t<cff1_font_dict_values_mod_t> fontdicts_mod;
+
+ bool drop_hints;
+
+ bool gid_renum;
+ bool subset_encoding;
+ uint8_t subset_enc_format;
+ unsigned int subset_enc_num_codes;
+ range_list_t subset_enc_code_ranges;
+ hb_vector_t<code_pair_t> subset_enc_supp_codes;
+
+ uint8_t subset_charset_format;
+ range_list_t subset_charset_ranges;
+ bool subset_charset;
+
+ remap_sid_t sidmap;
+ unsigned int topDictModSIDs[name_dict_values_t::ValCount];
+
+ bool desubroutinize;
+};
+
+static bool _serialize_cff1 (hb_serialize_context_t *c,
+ cff_subset_plan &plan,
+ const OT::cff1::accelerator_subset_t &acc,
+ unsigned int num_glyphs)
+{
+ /* private dicts & local subrs */
+ 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)
+ {
+ CFF1Subrs *dest = c->start_embed <CFF1Subrs> ();
+ if (unlikely (!dest)) return false;
+ c->push ();
+ if (likely (dest && 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);
+ /* N.B. local subrs immediately follows its corresponding private dict. i.e., subr offset == private dict size */
+ if (likely (pd->serialize (c, acc.privateDicts[i], privSzr, subrs_link)))
+ {
+ unsigned fd = plan.fdmap[i];
+ plan.fontdicts_mod[fd].privateDictInfo.size = c->length ();
+ plan.fontdicts_mod[fd].privateDictInfo.link = c->pop_pack ();
+ }
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+ }
+
+ if (!acc.is_CID ())
+ plan.info.privateDictInfo = plan.fontdicts_mod[0].privateDictInfo;
+
+ /* CharStrings */
+ {
+ CFF1CharStrings *cs = c->start_embed<CFF1CharStrings> ();
+ 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;
+ }
+ }
+
+ /* FDArray (FD Index) */
+ if (acc.fdArray != &Null (CFF1FDArray))
+ {
+ CFF1FDArray *fda = c->start_embed<CFF1FDArray> ();
+ if (unlikely (!fda)) return false;
+ c->push ();
+ cff1_font_dict_op_serializer_t fontSzr;
+ auto it = + hb_zip (+ hb_iter (plan.fontdicts_mod), + hb_iter (plan.fontdicts_mod));
+ if (likely (fda->serialize (c, it, fontSzr)))
+ plan.info.fd_array_link = c->pop_pack (false);
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ /* FDSelect */
+ if (acc.fdSelect != &Null (CFF1FDSelect))
+ {
+ c->push ();
+ if (likely (hb_serialize_cff_fdselect (c, num_glyphs, *acc.fdSelect, acc.fdCount,
+ plan.subset_fdselect_format, plan.info.fd_select.size,
+ plan.subset_fdselect_ranges)))
+ plan.info.fd_select.link = c->pop_pack ();
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ /* Charset */
+ if (plan.subset_charset)
+ {
+ Charset *dest = c->start_embed<Charset> ();
+ if (unlikely (!dest)) return false;
+ c->push ();
+ if (likely (dest->serialize (c,
+ plan.subset_charset_format,
+ plan.num_glyphs,
+ plan.subset_charset_ranges)))
+ plan.info.charset_link = c->pop_pack ();
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ /* Encoding */
+ if (plan.subset_encoding)
+ {
+ Encoding *dest = c->start_embed<Encoding> ();
+ if (unlikely (!dest)) return false;
+ c->push ();
+ if (likely (dest->serialize (c,
+ plan.subset_enc_format,
+ plan.subset_enc_num_codes,
+ plan.subset_enc_code_ranges,
+ plan.subset_enc_supp_codes)))
+ plan.info.encoding_link = c->pop_pack ();
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ /* global subrs */
+ {
+ c->push ();
+ CFF1Subrs *dest = c->start_embed <CFF1Subrs> ();
+ if (unlikely (!dest)) return false;
+ if (likely (dest->serialize (c, plan.subset_globalsubrs)))
+ c->pop_pack ();
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ /* String INDEX */
+ {
+ CFF1StringIndex *dest = c->start_embed<CFF1StringIndex> ();
+ if (unlikely (!dest)) return false;
+ c->push ();
+ if (likely (dest->serialize (c, *acc.stringIndex, plan.sidmap)))
+ c->pop_pack ();
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ }
+
+ OT::cff1 *cff = c->allocate_min<OT::cff1> ();
+ if (unlikely (!cff))
+ return false;
+
+ /* header */
+ cff->version.major = 0x01;
+ cff->version.minor = 0x00;
+ cff->nameIndex = cff->min_size;
+ cff->offSize = 4; /* unused? */
+
+ /* name INDEX */
+ if (unlikely (!(*acc.nameIndex).copy (c))) return false;
+
+ /* top dict INDEX */
+ {
+ /* serialize singleton TopDict */
+ TopDict *top = c->start_embed<TopDict> ();
+ if (!top) return false;
+ c->push ();
+ cff1_top_dict_op_serializer_t topSzr;
+ unsigned top_size = 0;
+ top_dict_modifiers_t modifier (plan.info, plan.topDictModSIDs);
+ if (likely (top->serialize (c, plan.topdict_mod, topSzr, modifier)))
+ {
+ top_size = c->length ();
+ c->pop_pack (false);
+ }
+ else
+ {
+ c->pop_discard ();
+ return false;
+ }
+ /* serialize INDEX header for above */
+ CFF1Index *dest = c->start_embed<CFF1Index> ();
+ if (!dest) return false;
+ return dest->serialize_header (c, hb_iter (hb_array_t<unsigned> (&top_size, 1)));
+ }
+}
+
+static bool
+_hb_subset_cff1 (const OT::cff1::accelerator_subset_t &acc,
+ hb_subset_context_t *c)
+{
+ cff_subset_plan cff_plan;
+
+ if (unlikely (!cff_plan.create (acc, c->plan)))
+ {
+ DEBUG_MSG(SUBSET, nullptr, "Failed to generate a cff subsetting plan.");
+ return false;
+ }
+
+ return _serialize_cff1 (c->serializer, cff_plan, acc, c->plan->num_output_glyphs ());
+}
+
+/**
+ * hb_subset_cff1:
+ * Subsets the CFF table according to a provided plan.
+ *
+ * Return value: subsetted cff table.
+ **/
+bool
+hb_subset_cff1 (hb_subset_context_t *c)
+{
+ OT::cff1::accelerator_subset_t acc;
+ acc.init (c->plan->source);
+ bool result = likely (acc.is_valid ()) && _hb_subset_cff1 (acc, c);
+ acc.fini ();
+
+ return result;
+}
+
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 14:30:52 +0000