1162 lines
33 KiB
C++
1162 lines
33 KiB
C++
/*
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* Copyright © 2018 Adobe Systems Incorporated.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#ifndef HB_OT_CFF1_TABLE_HH
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#define HB_OT_CFF1_TABLE_HH
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#include "hb-ot-cff-common.hh"
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#include "hb-subset-cff1.hh"
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namespace CFF {
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/*
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* CFF -- Compact Font Format (CFF)
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* http://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5176.CFF.pdf
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*/
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#define HB_OT_TAG_cff1 HB_TAG('C','F','F',' ')
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#define CFF_UNDEF_CODE 0xFFFFFFFF
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enum EncodingID { StandardEncoding = 0, ExpertEncoding = 1 };
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enum CharsetID { ISOAdobeCharset = 0, ExpertCharset = 1, ExpertSubsetCharset = 2 };
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typedef CFFIndex<HBUINT16> CFF1Index;
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template <typename Type> struct CFF1IndexOf : CFFIndexOf<HBUINT16, Type> {};
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typedef CFFIndex<HBUINT16> CFF1Index;
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typedef CFF1Index CFF1CharStrings;
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typedef FDArray<HBUINT16> CFF1FDArray;
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typedef Subrs<HBUINT16> CFF1Subrs;
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struct CFF1FDSelect : FDSelect {};
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/* Encoding */
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struct Encoding0 {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) && codes[nCodes - 1].sanitize (c));
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}
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inline hb_codepoint_t get_code (hb_codepoint_t glyph) const
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{
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if (glyph < nCodes)
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{
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return (hb_codepoint_t)codes[glyph];
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}
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else
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return CFF_UNDEF_CODE;
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}
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inline unsigned int get_size (void) const
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{ return HBUINT8::static_size * (nCodes + 1); }
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HBUINT8 nCodes;
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HBUINT8 codes[VAR];
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DEFINE_SIZE_ARRAY(1, codes);
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};
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struct Encoding1_Range {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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HBUINT8 first;
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HBUINT8 nLeft;
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DEFINE_SIZE_STATIC (2);
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};
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struct Encoding1 {
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inline unsigned int get_size (void) const
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{ return HBUINT8::static_size + Encoding1_Range::static_size * nRanges; }
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) && ((nRanges == 0) || (ranges[nRanges - 1]).sanitize (c)));
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}
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inline hb_codepoint_t get_code (hb_codepoint_t glyph) const
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{
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for (unsigned int i = 0; i < nRanges; i++)
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{
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if (glyph <= ranges[i].nLeft)
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{
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return (hb_codepoint_t)ranges[i].first + glyph;
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}
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glyph -= (ranges[i].nLeft + 1);
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}
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return CFF_UNDEF_CODE;
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}
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HBUINT8 nRanges;
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Encoding1_Range ranges[VAR];
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DEFINE_SIZE_ARRAY (1, ranges);
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};
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struct SuppEncoding {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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HBUINT8 code;
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HBUINT16 glyph;
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DEFINE_SIZE_STATIC (3);
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};
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struct CFF1SuppEncData {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) && ((nSups == 0) || (supps[nSups - 1]).sanitize (c)));
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}
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inline void get_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const
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{
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for (unsigned int i = 0; i < nSups; i++)
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if (sid == supps[i].glyph)
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codes.push (supps[i].code);
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}
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inline unsigned int get_size (void) const
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{ return HBUINT8::static_size + SuppEncoding::static_size * nSups; }
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HBUINT8 nSups;
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SuppEncoding supps[VAR];
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DEFINE_SIZE_ARRAY (1, supps);
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};
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struct code_pair
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{
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hb_codepoint_t code;
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hb_codepoint_t glyph;
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};
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struct Encoding {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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if (unlikely (!c->check_struct (this)))
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return_trace (false);
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unsigned int fmt = format & 0x7F;
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if (unlikely (fmt > 1))
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return_trace (false);
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if (unlikely (!((fmt == 0)? u.format0.sanitize (c): u.format1.sanitize (c))))
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return_trace (false);
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return_trace (((format & 0x80) == 0) || suppEncData ().sanitize (c));
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}
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/* serialize a fullset Encoding */
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inline bool serialize (hb_serialize_context_t *c, const Encoding &src)
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{
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TRACE_SERIALIZE (this);
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unsigned int size = src.get_size ();
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Encoding *dest = c->allocate_size<Encoding> (size);
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if (unlikely (dest == nullptr)) return_trace (false);
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memcpy (dest, &src, size);
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return_trace (true);
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}
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/* serialize a subset Encoding */
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inline bool serialize (hb_serialize_context_t *c,
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uint8_t format,
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unsigned int enc_count,
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const hb_vector_t<code_pair>& code_ranges,
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const hb_vector_t<code_pair>& supp_codes)
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{
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TRACE_SERIALIZE (this);
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Encoding *dest = c->extend_min (*this);
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if (unlikely (dest == nullptr)) return_trace (false);
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dest->format.set (format | ((supp_codes.len > 0)? 0x80: 0));
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if (format == 0)
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{
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Encoding0 *fmt0 = c->allocate_size<Encoding0> (Encoding0::min_size + HBUINT8::static_size * enc_count);
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if (unlikely (fmt0 == nullptr)) return_trace (false);
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fmt0->nCodes.set (enc_count);
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unsigned int glyph = 0;
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for (unsigned int i = 0; i < code_ranges.len; i++)
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{
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hb_codepoint_t code = code_ranges[i].code;
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for (int left = (int)code_ranges[i].glyph; left >= 0; left--)
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fmt0->codes[glyph++].set (code++);
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assert ((glyph <= 0x100) && (code <= 0x100));
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}
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}
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else
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{
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Encoding1 *fmt1 = c->allocate_size<Encoding1> (Encoding1::min_size + Encoding1_Range::static_size * code_ranges.len);
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if (unlikely (fmt1 == nullptr)) return_trace (false);
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fmt1->nRanges.set (code_ranges.len);
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for (unsigned int i = 0; i < code_ranges.len; i++)
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{
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assert ((code_ranges[i].code <= 0xFF) && (code_ranges[i].glyph <= 0xFF));
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fmt1->ranges[i].first.set (code_ranges[i].code);
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fmt1->ranges[i].nLeft.set (code_ranges[i].glyph);
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}
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}
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if (supp_codes.len > 0)
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{
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CFF1SuppEncData *suppData = c->allocate_size<CFF1SuppEncData> (CFF1SuppEncData::min_size + SuppEncoding::static_size * supp_codes.len);
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if (unlikely (suppData == nullptr)) return_trace (false);
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suppData->nSups.set (supp_codes.len);
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for (unsigned int i = 0; i < supp_codes.len; i++)
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{
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suppData->supps[i].code.set (supp_codes[i].code);
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suppData->supps[i].glyph.set (supp_codes[i].glyph); /* actually SID */
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}
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}
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return_trace (true);
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}
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/* parallel to above: calculate the size of a subset Encoding */
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static inline unsigned int calculate_serialized_size (
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uint8_t format,
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unsigned int enc_count,
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unsigned int supp_count)
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{
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unsigned int size = min_size;
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if (format == 0)
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size += Encoding0::min_size + HBUINT8::static_size * enc_count;
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else
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size += Encoding1::min_size + Encoding1_Range::static_size * enc_count;
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if (supp_count > 0)
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size += CFF1SuppEncData::min_size + SuppEncoding::static_size * supp_count;
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return size;
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}
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inline unsigned int get_size (void) const
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{
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unsigned int size = min_size;
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if (table_format () == 0)
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size += u.format0.get_size ();
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else
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size += u.format1.get_size ();
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if (has_supplement ())
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size += suppEncData ().get_size ();
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return size;
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}
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inline hb_codepoint_t get_code (hb_codepoint_t glyph) const
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{
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if (table_format () == 0)
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return u.format0.get_code (glyph);
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else
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return u.format1.get_code (glyph);
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}
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inline uint8_t table_format (void) const { return (format & 0x7F); }
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inline bool has_supplement (void) const { return (format & 0x80) != 0; }
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inline void get_supplement_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const
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{
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codes.resize (0);
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if (has_supplement ())
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suppEncData().get_codes (sid, codes);
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}
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protected:
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inline const CFF1SuppEncData &suppEncData (void) const
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{
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if ((format & 0x7F) == 0)
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return StructAfter<CFF1SuppEncData> (u.format0.codes[u.format0.nCodes-1]);
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else
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return StructAfter<CFF1SuppEncData> (u.format1.ranges[u.format1.nRanges-1]);
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}
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public:
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HBUINT8 format;
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union {
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Encoding0 format0;
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Encoding1 format1;
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} u;
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/* CFF1SuppEncData suppEncData; */
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DEFINE_SIZE_MIN (1);
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};
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/* Charset */
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struct Charset0 {
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inline bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) && sids[num_glyphs - 1].sanitize (c));
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}
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inline hb_codepoint_t get_sid (hb_codepoint_t glyph) const
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{
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if (glyph == 0)
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return 0;
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else
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return sids[glyph - 1];
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}
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inline unsigned int get_size (unsigned int num_glyphs) const
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{
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assert (num_glyphs > 0);
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return HBUINT16::static_size * (num_glyphs - 1);
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}
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HBUINT16 sids[VAR];
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DEFINE_SIZE_ARRAY(0, sids);
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};
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template <typename TYPE>
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struct Charset_Range {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this));
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}
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HBUINT16 first;
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TYPE nLeft;
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DEFINE_SIZE_STATIC (HBUINT16::static_size + TYPE::static_size);
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};
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template <typename TYPE>
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struct Charset1_2 {
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inline bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const
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{
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TRACE_SANITIZE (this);
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if (unlikely (!c->check_struct (this)))
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return_trace (false);
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num_glyphs--;
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for (unsigned int i = 0; num_glyphs > 0; i++)
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{
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if (unlikely (!ranges[i].sanitize (c) || (num_glyphs < ranges[i].nLeft + 1)))
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return_trace (false);
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num_glyphs -= (ranges[i].nLeft + 1);
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}
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return_trace (true);
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}
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inline hb_codepoint_t get_sid (hb_codepoint_t glyph) const
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{
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if (glyph == 0) return 0;
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glyph--;
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for (unsigned int i = 0;; i++)
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{
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if (glyph <= ranges[i].nLeft)
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return (hb_codepoint_t)ranges[i].first + glyph;
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glyph -= (ranges[i].nLeft + 1);
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}
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return 0;
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}
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inline unsigned int get_size (unsigned int num_glyphs) const
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{
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unsigned int size = HBUINT8::static_size;
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int glyph = (int)num_glyphs;
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assert (glyph > 0);
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glyph--;
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for (unsigned int i = 0; glyph > 0; i++)
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{
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glyph -= (ranges[i].nLeft + 1);
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size += Charset_Range<TYPE>::static_size;
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}
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return size;
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}
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Charset_Range<TYPE> ranges[VAR];
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DEFINE_SIZE_ARRAY (0, ranges);
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};
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typedef Charset1_2<HBUINT8> Charset1;
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typedef Charset1_2<HBUINT16> Charset2;
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typedef Charset_Range<HBUINT8> Charset1_Range;
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typedef Charset_Range<HBUINT16> Charset2_Range;
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struct Charset {
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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if (unlikely (!c->check_struct (this)))
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return_trace (false);
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if (format == 0)
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return_trace (u.format0.sanitize (c, c->get_num_glyphs ()));
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else if (format == 1)
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return_trace (u.format1.sanitize (c, c->get_num_glyphs ()));
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else if (likely (format == 2))
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return_trace (u.format2.sanitize (c, c->get_num_glyphs ()));
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else
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return_trace (false);
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}
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/* serialize a fullset Charset */
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inline bool serialize (hb_serialize_context_t *c, const Charset &src, unsigned int num_glyphs)
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{
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TRACE_SERIALIZE (this);
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unsigned int size = src.get_size (num_glyphs);
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Charset *dest = c->allocate_size<Charset> (size);
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if (unlikely (dest == nullptr)) return_trace (false);
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memcpy (dest, &src, size);
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return_trace (true);
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}
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/* serialize a subset Charset */
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inline bool serialize (hb_serialize_context_t *c,
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uint8_t format,
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unsigned int num_glyphs,
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const hb_vector_t<code_pair>& sid_ranges)
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{
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TRACE_SERIALIZE (this);
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Charset *dest = c->extend_min (*this);
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if (unlikely (dest == nullptr)) return_trace (false);
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dest->format.set (format);
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if (format == 0)
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{
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Charset0 *fmt0 = c->allocate_size<Charset0> (Charset0::min_size + HBUINT8::static_size * (num_glyphs - 1));
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if (unlikely (fmt0 == nullptr)) return_trace (false);
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unsigned int glyph = 0;
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for (unsigned int i = 0; i < sid_ranges.len; i++)
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{
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hb_codepoint_t sid = sid_ranges[i].code;
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for (int left = (int)sid_ranges[i].glyph; left >= 0; left--)
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fmt0->sids[glyph++].set (sid++);
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}
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}
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else if (format == 1)
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{
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Charset1 *fmt1 = c->allocate_size<Charset1> (Charset1::min_size + Charset1_Range::static_size * sid_ranges.len);
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if (unlikely (fmt1 == nullptr)) return_trace (false);
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for (unsigned int i = 0; i < sid_ranges.len; i++)
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{
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assert (sid_ranges[i].glyph <= 0xFF);
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fmt1->ranges[i].first.set (sid_ranges[i].code);
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fmt1->ranges[i].nLeft.set (sid_ranges[i].glyph);
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}
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}
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else /* format 2 */
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{
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Charset2 *fmt2 = c->allocate_size<Charset2> (Charset2::min_size + Charset2_Range::static_size * sid_ranges.len);
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if (unlikely (fmt2 == nullptr)) return_trace (false);
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for (unsigned int i = 0; i < sid_ranges.len; i++)
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{
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assert (sid_ranges[i].glyph <= 0xFFFF);
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fmt2->ranges[i].first.set (sid_ranges[i].code);
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fmt2->ranges[i].nLeft.set (sid_ranges[i].glyph);
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}
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}
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return_trace (true);
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}
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|
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/* parallel to above: calculate the size of a subset Charset */
|
|
static inline unsigned int calculate_serialized_size (
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uint8_t format,
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unsigned int count)
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{
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unsigned int size = min_size;
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if (format == 0)
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size += Charset0::min_size + HBUINT8::static_size * (count - 1);
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else if (format == 1)
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size += Charset1::min_size + Charset1_Range::static_size * count;
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else
|
|
size += Charset2::min_size + Charset2_Range::static_size * count;
|
|
|
|
return size;
|
|
}
|
|
|
|
inline unsigned int get_size (unsigned int num_glyphs) const
|
|
{
|
|
unsigned int size = min_size;
|
|
if (format == 0)
|
|
size += u.format0.get_size (num_glyphs);
|
|
else if (format == 1)
|
|
size += u.format1.get_size (num_glyphs);
|
|
else
|
|
size += u.format2.get_size (num_glyphs);
|
|
return size;
|
|
}
|
|
|
|
inline hb_codepoint_t get_sid (hb_codepoint_t glyph) const
|
|
{
|
|
if (format == 0)
|
|
return u.format0.get_sid (glyph);
|
|
else if (format == 1)
|
|
return u.format1.get_sid (glyph);
|
|
else
|
|
return u.format2.get_sid (glyph);
|
|
}
|
|
|
|
HBUINT8 format;
|
|
union {
|
|
Charset0 format0;
|
|
Charset1 format1;
|
|
Charset2 format2;
|
|
} u;
|
|
|
|
DEFINE_SIZE_MIN (1);
|
|
};
|
|
|
|
struct CFF1TopDictValues : TopDictValues
|
|
{
|
|
inline void init (void)
|
|
{
|
|
TopDictValues::init ();
|
|
|
|
ros[0] = ros[1] = ros[2] = 0;
|
|
cidCount = 8720;
|
|
EncodingOffset = 0;
|
|
CharsetOffset = 0;
|
|
FDSelectOffset = 0;
|
|
privateDictInfo.init ();
|
|
}
|
|
|
|
inline void fini (void)
|
|
{
|
|
TopDictValues::fini ();
|
|
}
|
|
|
|
inline bool is_CID (void) const
|
|
{ return ros[0] != 0; }
|
|
|
|
inline unsigned int calculate_serialized_size (void) const
|
|
{
|
|
unsigned int size = 0;
|
|
for (unsigned int i = 0; i < getNumValues (); i++)
|
|
{
|
|
OpCode op = getValue (i).op;
|
|
switch (op)
|
|
{
|
|
case OpCode_FDSelect:
|
|
size += OpCode_Size (OpCode_longintdict) + 4 + OpCode_Size (op);
|
|
break;
|
|
default:
|
|
size += TopDictValues::calculate_serialized_op_size (getValue (i));
|
|
break;
|
|
}
|
|
}
|
|
return size;
|
|
}
|
|
|
|
unsigned int ros[3]; /* registry, ordering, supplement */
|
|
unsigned int cidCount;
|
|
|
|
unsigned int EncodingOffset;
|
|
unsigned int CharsetOffset;
|
|
unsigned int FDSelectOffset;
|
|
TableInfo privateDictInfo;
|
|
};
|
|
|
|
/* a copy of a parsed out CFF1TopDictValues augmented with additional operators */
|
|
struct CFF1TopDictValuesMod : CFF1TopDictValues
|
|
{
|
|
inline void init (const CFF1TopDictValues *base_= &Null(CFF1TopDictValues))
|
|
{
|
|
SUPER::init ();
|
|
base = base_;
|
|
}
|
|
|
|
inline void fini (void)
|
|
{
|
|
SUPER::fini ();
|
|
}
|
|
|
|
inline unsigned getNumValues (void) const
|
|
{
|
|
return base->getNumValues () + SUPER::getNumValues ();
|
|
}
|
|
inline const OpStr &getValue (unsigned int i) const
|
|
{
|
|
if (i < base->getNumValues ())
|
|
return (*base)[i];
|
|
else
|
|
return SUPER::values[i - base->getNumValues ()];
|
|
}
|
|
inline const OpStr &operator [] (unsigned int i) const { return getValue (i); }
|
|
|
|
protected:
|
|
typedef CFF1TopDictValues SUPER;
|
|
const CFF1TopDictValues *base;
|
|
};
|
|
|
|
struct CFF1TopDictOpSet : TopDictOpSet
|
|
{
|
|
static inline bool process_op (OpCode op, NumInterpEnv& env, CFF1TopDictValues& dictval)
|
|
{
|
|
|
|
switch (op) {
|
|
case OpCode_version:
|
|
case OpCode_Notice:
|
|
case OpCode_Copyright:
|
|
case OpCode_FullName:
|
|
case OpCode_FamilyName:
|
|
case OpCode_Weight:
|
|
case OpCode_isFixedPitch:
|
|
case OpCode_ItalicAngle:
|
|
case OpCode_UnderlinePosition:
|
|
case OpCode_UnderlineThickness:
|
|
case OpCode_PaintType:
|
|
case OpCode_CharstringType:
|
|
case OpCode_UniqueID:
|
|
case OpCode_StrokeWidth:
|
|
case OpCode_SyntheticBase:
|
|
case OpCode_PostScript:
|
|
case OpCode_BaseFontName:
|
|
case OpCode_CIDFontVersion:
|
|
case OpCode_CIDFontRevision:
|
|
case OpCode_CIDFontType:
|
|
case OpCode_UIDBase:
|
|
case OpCode_FontBBox:
|
|
case OpCode_XUID:
|
|
case OpCode_BaseFontBlend:
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_CIDCount:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.cidCount)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_ROS:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.ros[2]) ||
|
|
!env.argStack.check_pop_uint (dictval.ros[1]) ||
|
|
!env.argStack.check_pop_uint (dictval.ros[0])))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_Encoding:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.EncodingOffset)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_charset:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.CharsetOffset)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_FDSelect:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.FDSelectOffset)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_Private:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.privateDictInfo.offset)))
|
|
return false;
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.privateDictInfo.size)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
default:
|
|
if (unlikely (!TopDictOpSet::process_op (op, env, dictval)))
|
|
return false;
|
|
/* Record this operand below if stack is empty, otherwise done */
|
|
if (!env.argStack.is_empty ()) return true;
|
|
break;
|
|
}
|
|
|
|
dictval.addOp (op, env.substr);
|
|
return true;
|
|
}
|
|
};
|
|
|
|
struct CFF1FontDictValues : DictValues<OpStr>
|
|
{
|
|
inline void init (void)
|
|
{
|
|
DictValues<OpStr>::init ();
|
|
privateDictInfo.init ();
|
|
}
|
|
|
|
inline void fini (void)
|
|
{
|
|
DictValues<OpStr>::fini ();
|
|
}
|
|
|
|
TableInfo privateDictInfo;
|
|
};
|
|
|
|
struct CFF1FontDictOpSet : DictOpSet
|
|
{
|
|
static inline bool process_op (OpCode op, NumInterpEnv& env, CFF1FontDictValues& dictval)
|
|
{
|
|
switch (op) {
|
|
case OpCode_FontName:
|
|
case OpCode_FontMatrix:
|
|
case OpCode_PaintType:
|
|
env.clear_args ();
|
|
break;
|
|
case OpCode_Private:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.privateDictInfo.offset)))
|
|
return false;
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.privateDictInfo.size)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
default:
|
|
if (unlikely (!DictOpSet::process_op (op, env)))
|
|
return false;
|
|
if (!env.argStack.is_empty ()) return true;
|
|
break;
|
|
}
|
|
|
|
dictval.addOp (op, env.substr);
|
|
return true;
|
|
}
|
|
};
|
|
|
|
template <typename VAL>
|
|
struct CFF1PrivateDictValues_Base : DictValues<VAL>
|
|
{
|
|
inline void init (void)
|
|
{
|
|
DictValues<VAL>::init ();
|
|
subrsOffset = 0;
|
|
localSubrs = &Null(CFF1Subrs);
|
|
}
|
|
|
|
inline void fini (void)
|
|
{
|
|
DictValues<VAL>::fini ();
|
|
}
|
|
|
|
inline unsigned int calculate_serialized_size (void) const
|
|
{
|
|
unsigned int size = 0;
|
|
for (unsigned int i = 0; i < DictValues<VAL>::getNumValues; i++)
|
|
if (DictValues<VAL>::getValue (i).op == OpCode_Subrs)
|
|
size += OpCode_Size (OpCode_shortint) + 2 + OpCode_Size (OpCode_Subrs);
|
|
else
|
|
size += DictValues<VAL>::getValue (i).str.len;
|
|
return size;
|
|
}
|
|
|
|
unsigned int subrsOffset;
|
|
const CFF1Subrs *localSubrs;
|
|
};
|
|
|
|
typedef CFF1PrivateDictValues_Base<OpStr> CFF1PrivateDictValues_Subset;
|
|
typedef CFF1PrivateDictValues_Base<NumDictVal> CFF1PrivateDictValues;
|
|
|
|
struct CFF1PrivateDictOpSet : DictOpSet
|
|
{
|
|
static inline bool process_op (OpCode op, NumInterpEnv& env, CFF1PrivateDictValues& dictval)
|
|
{
|
|
NumDictVal val;
|
|
val.init ();
|
|
|
|
switch (op) {
|
|
case OpCode_BlueValues:
|
|
case OpCode_OtherBlues:
|
|
case OpCode_FamilyBlues:
|
|
case OpCode_FamilyOtherBlues:
|
|
case OpCode_StemSnapH:
|
|
case OpCode_StemSnapV:
|
|
if (unlikely (!env.argStack.check_pop_delta (val.multi_val)))
|
|
return false;
|
|
break;
|
|
case OpCode_StdHW:
|
|
case OpCode_StdVW:
|
|
case OpCode_BlueScale:
|
|
case OpCode_BlueShift:
|
|
case OpCode_BlueFuzz:
|
|
case OpCode_ForceBold:
|
|
case OpCode_LanguageGroup:
|
|
case OpCode_ExpansionFactor:
|
|
case OpCode_initialRandomSeed:
|
|
case OpCode_defaultWidthX:
|
|
case OpCode_nominalWidthX:
|
|
if (unlikely (!env.argStack.check_pop_num (val.single_val)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
case OpCode_Subrs:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.subrsOffset)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
default:
|
|
if (unlikely (!DictOpSet::process_op (op, env)))
|
|
return false;
|
|
if (!env.argStack.is_empty ()) return true;
|
|
break;
|
|
}
|
|
|
|
dictval.addOp (op, env.substr, val);
|
|
return true;
|
|
}
|
|
};
|
|
|
|
struct CFF1PrivateDictOpSet_Subset : DictOpSet
|
|
{
|
|
static inline bool process_op (OpCode op, NumInterpEnv& env, CFF1PrivateDictValues_Subset& dictval)
|
|
{
|
|
switch (op) {
|
|
case OpCode_BlueValues:
|
|
case OpCode_OtherBlues:
|
|
case OpCode_FamilyBlues:
|
|
case OpCode_FamilyOtherBlues:
|
|
case OpCode_StemSnapH:
|
|
case OpCode_StemSnapV:
|
|
case OpCode_StdHW:
|
|
case OpCode_StdVW:
|
|
case OpCode_BlueScale:
|
|
case OpCode_BlueShift:
|
|
case OpCode_BlueFuzz:
|
|
case OpCode_ForceBold:
|
|
case OpCode_LanguageGroup:
|
|
case OpCode_ExpansionFactor:
|
|
case OpCode_initialRandomSeed:
|
|
case OpCode_defaultWidthX:
|
|
case OpCode_nominalWidthX:
|
|
env.clear_args ();
|
|
break;
|
|
|
|
case OpCode_Subrs:
|
|
if (unlikely (!env.argStack.check_pop_uint (dictval.subrsOffset)))
|
|
return false;
|
|
env.clear_args ();
|
|
break;
|
|
|
|
default:
|
|
if (unlikely (!DictOpSet::process_op (op, env)))
|
|
return false;
|
|
if (!env.argStack.is_empty ()) return true;
|
|
break;
|
|
}
|
|
|
|
dictval.addOp (op, env.substr);
|
|
return true;
|
|
}
|
|
};
|
|
|
|
typedef DictInterpreter<CFF1TopDictOpSet, CFF1TopDictValues> CFF1TopDict_Interpreter;
|
|
typedef DictInterpreter<CFF1FontDictOpSet, CFF1FontDictValues> CFF1FontDict_Interpreter;
|
|
typedef DictInterpreter<CFF1PrivateDictOpSet, CFF1PrivateDictValues> CFF1PrivateDict_Interpreter;
|
|
|
|
typedef CFF1Index CFF1NameIndex;
|
|
typedef CFF1IndexOf<TopDict> CFF1TopDictIndex;
|
|
typedef CFF1Index CFF1StringIndex;
|
|
|
|
}; /* namespace CFF */
|
|
|
|
namespace OT {
|
|
|
|
using namespace CFF;
|
|
|
|
struct cff1
|
|
{
|
|
static const hb_tag_t tableTag = HB_OT_TAG_cff1;
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this) &&
|
|
likely (version.major == 1));
|
|
}
|
|
|
|
template <typename PRIVOPSET, typename PRIVDICTVAL>
|
|
struct accelerator_templ_t
|
|
{
|
|
inline void init (hb_face_t *face)
|
|
{
|
|
topDicts.init ();
|
|
topDicts.resize (1);
|
|
topDicts[0].init ();
|
|
fontDicts.init ();
|
|
privateDicts.init ();
|
|
|
|
this->blob = sc.reference_table<cff1> (face);
|
|
|
|
/* setup for run-time santization */
|
|
sc.init (this->blob);
|
|
sc.start_processing ();
|
|
|
|
const OT::cff1 *cff = this->blob->template as<OT::cff1> ();
|
|
|
|
if (cff == &Null(OT::cff1))
|
|
{ fini (); return; }
|
|
|
|
nameIndex = &cff->nameIndex (cff);
|
|
if ((nameIndex == &Null (CFF1NameIndex)) || !nameIndex->sanitize (&sc))
|
|
{ fini (); return; }
|
|
|
|
topDictIndex = &StructAtOffset<CFF1TopDictIndex> (nameIndex, nameIndex->get_size ());
|
|
if ((topDictIndex == &Null (CFF1TopDictIndex)) || !topDictIndex->sanitize (&sc) || (topDictIndex->count == 0))
|
|
{ fini (); return; }
|
|
|
|
{ /* parse top dict */
|
|
const ByteStr topDictStr = (*topDictIndex)[0];
|
|
if (unlikely (!topDictStr.sanitize (&sc))) { fini (); return; }
|
|
CFF1TopDict_Interpreter top_interp;
|
|
top_interp.env.init (topDictStr);
|
|
if (unlikely (!top_interp.interpret (topDicts[0]))) { fini (); return; }
|
|
}
|
|
|
|
encoding = &Null(Encoding);
|
|
charset = &StructAtOffsetOrNull<Charset> (cff, topDicts[0].CharsetOffset);
|
|
if (unlikely (is_CID () && (charset == &Null(Charset))))
|
|
{ fini (); return; }
|
|
|
|
fdCount = 1;
|
|
if (is_CID ())
|
|
{
|
|
fdArray = &StructAtOffsetOrNull<CFF1FDArray> (cff, topDicts[0].FDArrayOffset);
|
|
fdSelect = &StructAtOffsetOrNull<CFF1FDSelect> (cff, topDicts[0].FDSelectOffset);
|
|
if (unlikely ((fdArray == &Null(CFF1FDArray)) || !fdArray->sanitize (&sc) ||
|
|
(fdSelect == &Null(CFF1FDSelect)) || !fdSelect->sanitize (&sc, fdArray->count)))
|
|
{ fini (); return; }
|
|
|
|
fdCount = fdArray->count;
|
|
}
|
|
else
|
|
{
|
|
fdArray = &Null(CFF1FDArray);
|
|
fdSelect = &Null(CFF1FDSelect);
|
|
if (!is_predef_encoding ())
|
|
{
|
|
encoding = &StructAtOffsetOrNull<Encoding> (cff, topDicts[0].EncodingOffset);
|
|
if ((encoding == &Null (Encoding)) || !encoding->sanitize (&sc))
|
|
{ fini (); return; }
|
|
}
|
|
}
|
|
|
|
stringIndex = &StructAtOffset<CFF1StringIndex> (topDictIndex, topDictIndex->get_size ());
|
|
if ((stringIndex == &Null (CFF1StringIndex)) || !stringIndex->sanitize (&sc))
|
|
{ fini (); return; }
|
|
|
|
globalSubrs = &StructAtOffset<CFF1Subrs> (stringIndex, stringIndex->get_size ());
|
|
if ((globalSubrs != &Null (CFF1Subrs)) && !stringIndex->sanitize (&sc))
|
|
{ fini (); return; }
|
|
|
|
charStrings = &StructAtOffsetOrNull<CFF1CharStrings> (cff, topDicts[0].charStringsOffset);
|
|
|
|
if ((charStrings == &Null(CFF1CharStrings)) || unlikely (!charStrings->sanitize (&sc)))
|
|
{ fini (); return; }
|
|
|
|
num_glyphs = charStrings->count;
|
|
if (num_glyphs != sc.get_num_glyphs ())
|
|
{ fini (); return; }
|
|
|
|
privateDicts.resize (fdCount);
|
|
for (unsigned int i = 0; i < fdCount; i++)
|
|
privateDicts[i].init ();
|
|
|
|
// parse CID font dicts and gather private dicts
|
|
if (is_CID ())
|
|
{
|
|
for (unsigned int i = 0; i < fdCount; i++)
|
|
{
|
|
ByteStr fontDictStr = (*fdArray)[i];
|
|
if (unlikely (!fontDictStr.sanitize (&sc))) { fini (); return; }
|
|
CFF1FontDictValues *font;
|
|
CFF1FontDict_Interpreter font_interp;
|
|
font_interp.env.init (fontDictStr);
|
|
font = fontDicts.push ();
|
|
if (unlikely (!font_interp.interpret (*font))) { fini (); return; }
|
|
PRIVDICTVAL *priv = &privateDicts[i];
|
|
const ByteStr privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size);
|
|
if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
|
|
DictInterpreter<PRIVOPSET, PRIVDICTVAL> priv_interp;
|
|
priv_interp.env.init (privDictStr);
|
|
if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; }
|
|
|
|
priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (privDictStr.str, priv->subrsOffset);
|
|
if (priv->localSubrs != &Null(CFF1Subrs) &&
|
|
unlikely (!priv->localSubrs->sanitize (&sc)))
|
|
{ fini (); return; }
|
|
}
|
|
}
|
|
else /* non-CID */
|
|
{
|
|
CFF1TopDictValues *font = &topDicts[0];
|
|
PRIVDICTVAL *priv = &privateDicts[0];
|
|
|
|
const ByteStr privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size);
|
|
if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
|
|
DictInterpreter<PRIVOPSET, PRIVDICTVAL> priv_interp;
|
|
priv_interp.env.init (privDictStr);
|
|
if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; }
|
|
|
|
priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (privDictStr.str, priv->subrsOffset);
|
|
if (priv->localSubrs != &Null(CFF1Subrs) &&
|
|
unlikely (!priv->localSubrs->sanitize (&sc)))
|
|
{ fini (); return; }
|
|
}
|
|
}
|
|
|
|
inline void fini (void)
|
|
{
|
|
sc.end_processing ();
|
|
topDicts[0].fini ();
|
|
topDicts.fini ();
|
|
fontDicts.fini ();
|
|
privateDicts.fini ();
|
|
hb_blob_destroy (blob);
|
|
blob = nullptr;
|
|
}
|
|
|
|
inline bool is_valid (void) const { return blob != nullptr; }
|
|
inline bool is_CID (void) const { return topDicts[0].is_CID (); }
|
|
|
|
inline bool is_predef_encoding (void) const { return topDicts[0].EncodingOffset <= ExpertEncoding; }
|
|
inline bool is_predef_charset (void) const { return topDicts[0].CharsetOffset <= ExpertSubsetCharset; }
|
|
|
|
inline hb_codepoint_t glyph_to_code (hb_codepoint_t glyph) const
|
|
{
|
|
if (encoding != &Null(Encoding))
|
|
return encoding->get_code (glyph);
|
|
else
|
|
{
|
|
hb_codepoint_t sid = glyph_to_sid (glyph);
|
|
if (sid == 0) return 0;
|
|
hb_codepoint_t code = 0;
|
|
switch (topDicts[0].EncodingOffset)
|
|
{
|
|
case StandardEncoding:
|
|
code = lookup_standard_encoding (sid);
|
|
break;
|
|
case ExpertEncoding:
|
|
code = lookup_expert_encoding (sid);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return code;
|
|
}
|
|
}
|
|
|
|
inline hb_codepoint_t glyph_to_sid (hb_codepoint_t glyph) const
|
|
{
|
|
if (charset != &Null(Charset))
|
|
return charset->get_sid (glyph);
|
|
else
|
|
{
|
|
hb_codepoint_t sid = 0;
|
|
switch (topDicts[0].CharsetOffset)
|
|
{
|
|
case ISOAdobeCharset:
|
|
if (glyph <= 228 /*zcaron*/) sid = glyph;
|
|
break;
|
|
case ExpertCharset:
|
|
sid = lookup_expert_charset (glyph);
|
|
break;
|
|
case ExpertSubsetCharset:
|
|
sid = lookup_expert_subset_charset (glyph);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return sid;
|
|
}
|
|
}
|
|
|
|
inline bool get_extents (hb_codepoint_t glyph,
|
|
hb_glyph_extents_t *extents) const
|
|
{
|
|
// XXX: TODO
|
|
if (glyph >= num_glyphs)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
protected:
|
|
hb_blob_t *blob;
|
|
hb_sanitize_context_t sc;
|
|
|
|
public:
|
|
const CFF1NameIndex *nameIndex;
|
|
const CFF1TopDictIndex *topDictIndex;
|
|
const CFF1StringIndex *stringIndex;
|
|
const Encoding *encoding;
|
|
const Charset *charset;
|
|
const CFF1Subrs *globalSubrs;
|
|
const CFF1CharStrings *charStrings;
|
|
const CFF1FDArray *fdArray;
|
|
const CFF1FDSelect *fdSelect;
|
|
unsigned int fdCount;
|
|
|
|
hb_vector_t<CFF1TopDictValues> topDicts;
|
|
hb_vector_t<CFF1FontDictValues> fontDicts;
|
|
hb_vector_t<PRIVDICTVAL> privateDicts;
|
|
|
|
unsigned int num_glyphs;
|
|
};
|
|
|
|
typedef accelerator_templ_t<CFF1PrivateDictOpSet, CFF1PrivateDictValues> accelerator_t;
|
|
typedef accelerator_templ_t<CFF1PrivateDictOpSet_Subset, CFF1PrivateDictValues_Subset> accelerator_subset_t;
|
|
|
|
inline bool subset (hb_subset_plan_t *plan) const
|
|
{
|
|
hb_blob_t *cff_prime = nullptr;
|
|
|
|
bool success = true;
|
|
if (hb_subset_cff1 (plan, &cff_prime)) {
|
|
success = success && plan->add_table (HB_OT_TAG_cff1, cff_prime);
|
|
} else {
|
|
success = false;
|
|
}
|
|
hb_blob_destroy (cff_prime);
|
|
|
|
return success;
|
|
}
|
|
|
|
protected:
|
|
static hb_codepoint_t lookup_standard_encoding (hb_codepoint_t sid);
|
|
static hb_codepoint_t lookup_expert_encoding (hb_codepoint_t sid);
|
|
static hb_codepoint_t lookup_expert_charset (hb_codepoint_t glyph);
|
|
static hb_codepoint_t lookup_expert_subset_charset (hb_codepoint_t glyph);
|
|
|
|
public:
|
|
FixedVersion<HBUINT8> version; /* Version of CFF table. set to 0x0100u */
|
|
OffsetTo<CFF1NameIndex, HBUINT8> nameIndex; /* headerSize = Offset to Name INDEX. */
|
|
HBUINT8 offSize; /* offset size (unused?) */
|
|
|
|
public:
|
|
DEFINE_SIZE_STATIC (4);
|
|
};
|
|
|
|
} /* namespace OT */
|
|
|
|
#endif /* HB_OT_CFF1_TABLE_HH */
|