2 * Copyright © 2018 Adobe Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Adobe Author(s): Michiharu Ariza
27 #ifndef HB_OT_CFF2_TABLE_HH
28 #define HB_OT_CFF2_TABLE_HH
30 #include "hb-ot-cff-common.hh"
31 #include "hb-subset-cff2.hh"
37 * CFF2 -- Compact Font Format (CFF) Version 2
38 * https://docs.microsoft.com/en-us/typography/opentype/spec/cff2
40 #define HB_OT_TAG_cff2 HB_TAG('C','F','F','2')
42 typedef CFFIndex<HBUINT32> CFF2Index;
43 template <typename Type> struct CFF2IndexOf : CFFIndexOf<HBUINT32, Type> {};
45 typedef CFF2Index CFF2CharStrings;
46 typedef Subrs<HBUINT32> CFF2Subrs;
48 typedef FDSelect3_4<HBUINT32, HBUINT16> FDSelect4;
49 typedef FDSelect3_4_Range<HBUINT32, HBUINT16> FDSelect4_Range;
53 bool serialize (hb_serialize_context_t *c, const CFF2FDSelect &src, unsigned int num_glyphs)
55 TRACE_SERIALIZE (this);
56 unsigned int size = src.get_size (num_glyphs);
57 CFF2FDSelect *dest = c->allocate_size<CFF2FDSelect> (size);
58 if (unlikely (!dest)) return_trace (false);
59 memcpy (dest, &src, size);
63 unsigned int get_size (unsigned int num_glyphs) const
67 case 0: return format.static_size + u.format0.get_size (num_glyphs);
68 case 3: return format.static_size + u.format3.get_size ();
69 case 4: return format.static_size + u.format4.get_size ();
74 hb_codepoint_t get_fd (hb_codepoint_t glyph) const
76 if (this == &Null (CFF2FDSelect))
81 case 0: return u.format0.get_fd (glyph);
82 case 3: return u.format3.get_fd (glyph);
83 case 4: return u.format4.get_fd (glyph);
88 bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const
90 TRACE_SANITIZE (this);
91 if (unlikely (!c->check_struct (this)))
96 case 0: return_trace (u.format0.sanitize (c, fdcount));
97 case 3: return_trace (u.format3.sanitize (c, fdcount));
98 case 4: return_trace (u.format4.sanitize (c, fdcount));
99 default:return_trace (false);
113 struct CFF2VariationStore
115 bool sanitize (hb_sanitize_context_t *c) const
117 TRACE_SANITIZE (this);
118 return_trace (likely (c->check_struct (this)) && c->check_range (&varStore, size) && varStore.sanitize (c));
121 bool serialize (hb_serialize_context_t *c, const CFF2VariationStore *varStore)
123 TRACE_SERIALIZE (this);
124 unsigned int size_ = varStore->get_size ();
125 CFF2VariationStore *dest = c->allocate_size<CFF2VariationStore> (size_);
126 if (unlikely (!dest)) return_trace (false);
127 memcpy (dest, varStore, size_);
131 unsigned int get_size () const { return HBUINT16::static_size + size; }
134 VariationStore varStore;
136 DEFINE_SIZE_MIN (2 + VariationStore::min_size);
139 struct cff2_top_dict_values_t : top_dict_values_t<>
143 top_dict_values_t<>::init ();
147 void fini () { top_dict_values_t<>::fini (); }
149 unsigned int vstoreOffset;
150 unsigned int FDSelectOffset;
153 struct cff2_top_dict_opset_t : top_dict_opset_t<>
155 static void process_op (op_code_t op, num_interp_env_t& env, cff2_top_dict_values_t& dictval)
158 case OpCode_FontMatrix:
162 dictval.add_op (op, env.str_ref);
168 dictval.vstoreOffset = env.argStack.pop_uint ();
171 case OpCode_FDSelect:
172 dictval.FDSelectOffset = env.argStack.pop_uint ();
177 SUPER::process_op (op, env, dictval);
178 /* Record this operand below if stack is empty, otherwise done */
179 if (!env.argStack.is_empty ()) return;
182 if (unlikely (env.in_error ())) return;
184 dictval.add_op (op, env.str_ref);
187 typedef top_dict_opset_t<> SUPER;
190 struct cff2_font_dict_values_t : dict_values_t<op_str_t>
194 dict_values_t<op_str_t>::init ();
195 privateDictInfo.init ();
197 void fini () { dict_values_t<op_str_t>::fini (); }
199 table_info_t privateDictInfo;
202 struct cff2_font_dict_opset_t : dict_opset_t
204 static void process_op (op_code_t op, num_interp_env_t& env, cff2_font_dict_values_t& dictval)
208 dictval.privateDictInfo.offset = env.argStack.pop_uint ();
209 dictval.privateDictInfo.size = env.argStack.pop_uint ();
214 SUPER::process_op (op, env);
215 if (!env.argStack.is_empty ())
219 if (unlikely (env.in_error ())) return;
221 dictval.add_op (op, env.str_ref);
225 typedef dict_opset_t SUPER;
228 template <typename VAL>
229 struct cff2_private_dict_values_base_t : dict_values_t<VAL>
233 dict_values_t<VAL>::init ();
235 localSubrs = &Null (CFF2Subrs);
238 void fini () { dict_values_t<VAL>::fini (); }
240 unsigned int subrsOffset;
241 const CFF2Subrs *localSubrs;
245 typedef cff2_private_dict_values_base_t<op_str_t> cff2_private_dict_values_subset_t;
246 typedef cff2_private_dict_values_base_t<num_dict_val_t> cff2_private_dict_values_t;
248 struct cff2_priv_dict_interp_env_t : num_interp_env_t
250 void init (const byte_str_t &str)
252 num_interp_env_t::init (str);
254 seen_vsindex = false;
257 void process_vsindex ()
259 if (likely (!seen_vsindex))
261 set_ivs (argStack.pop_uint ());
266 unsigned int get_ivs () const { return ivs; }
267 void set_ivs (unsigned int ivs_) { ivs = ivs_; }
274 struct cff2_private_dict_opset_t : dict_opset_t
276 static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_t& dictval)
284 case OpCode_BlueScale:
285 case OpCode_BlueShift:
286 case OpCode_BlueFuzz:
287 case OpCode_ExpansionFactor:
288 case OpCode_LanguageGroup:
289 val.single_val = env.argStack.pop_num ();
292 case OpCode_BlueValues:
293 case OpCode_OtherBlues:
294 case OpCode_FamilyBlues:
295 case OpCode_FamilyOtherBlues:
296 case OpCode_StemSnapH:
297 case OpCode_StemSnapV:
301 dictval.subrsOffset = env.argStack.pop_uint ();
304 case OpCode_vsindexdict:
305 env.process_vsindex ();
306 dictval.ivs = env.get_ivs ();
309 case OpCode_blenddict:
313 dict_opset_t::process_op (op, env);
314 if (!env.argStack.is_empty ()) return;
318 if (unlikely (env.in_error ())) return;
320 dictval.add_op (op, env.str_ref, val);
324 struct cff2_private_dict_opset_subset_t : dict_opset_t
326 static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_subset_t& dictval)
329 case OpCode_BlueValues:
330 case OpCode_OtherBlues:
331 case OpCode_FamilyBlues:
332 case OpCode_FamilyOtherBlues:
335 case OpCode_BlueScale:
336 case OpCode_BlueShift:
337 case OpCode_BlueFuzz:
338 case OpCode_StemSnapH:
339 case OpCode_StemSnapV:
340 case OpCode_LanguageGroup:
341 case OpCode_ExpansionFactor:
345 case OpCode_blenddict:
350 dictval.subrsOffset = env.argStack.pop_uint ();
355 SUPER::process_op (op, env);
356 if (!env.argStack.is_empty ()) return;
360 if (unlikely (env.in_error ())) return;
362 dictval.add_op (op, env.str_ref);
366 typedef dict_opset_t SUPER;
369 typedef dict_interpreter_t<cff2_top_dict_opset_t, cff2_top_dict_values_t> cff2_top_dict_interpreter_t;
370 typedef dict_interpreter_t<cff2_font_dict_opset_t, cff2_font_dict_values_t> cff2_font_dict_interpreter_t;
372 struct CFF2FDArray : FDArray<HBUINT32>
374 /* FDArray::serialize does not compile without this partial specialization */
375 template <typename ITER, typename OP_SERIALIZER>
376 bool serialize (hb_serialize_context_t *c, ITER it, OP_SERIALIZER& opszr)
377 { return FDArray<HBUINT32>::serialize<cff2_font_dict_values_t, table_info_t> (c, it, opszr); }
380 } /* namespace CFF */
388 static constexpr hb_tag_t tableTag = HB_OT_TAG_cff2;
390 bool sanitize (hb_sanitize_context_t *c) const
392 TRACE_SANITIZE (this);
393 return_trace (c->check_struct (this) &&
394 likely (version.major == 2));
397 template <typename PRIVOPSET, typename PRIVDICTVAL>
398 struct accelerator_templ_t
400 void init (hb_face_t *face)
404 privateDicts.init ();
406 this->blob = sc.reference_table<cff2> (face);
408 /* setup for run-time santization */
409 sc.init (this->blob);
410 sc.start_processing ();
412 const OT::cff2 *cff2 = this->blob->template as<OT::cff2> ();
414 if (cff2 == &Null (OT::cff2))
417 { /* parse top dict */
418 byte_str_t topDictStr (cff2 + cff2->topDict, cff2->topDictSize);
419 if (unlikely (!topDictStr.sanitize (&sc))) { fini (); return; }
420 cff2_top_dict_interpreter_t top_interp;
421 top_interp.env.init (topDictStr);
423 if (unlikely (!top_interp.interpret (topDict))) { fini (); return; }
426 globalSubrs = &StructAtOffset<CFF2Subrs> (cff2, cff2->topDict + cff2->topDictSize);
427 varStore = &StructAtOffsetOrNull<CFF2VariationStore> (cff2, topDict.vstoreOffset);
428 charStrings = &StructAtOffsetOrNull<CFF2CharStrings> (cff2, topDict.charStringsOffset);
429 fdArray = &StructAtOffsetOrNull<CFF2FDArray> (cff2, topDict.FDArrayOffset);
430 fdSelect = &StructAtOffsetOrNull<CFF2FDSelect> (cff2, topDict.FDSelectOffset);
432 if (((varStore != &Null (CFF2VariationStore)) && unlikely (!varStore->sanitize (&sc))) ||
433 (charStrings == &Null (CFF2CharStrings)) || unlikely (!charStrings->sanitize (&sc)) ||
434 (globalSubrs == &Null (CFF2Subrs)) || unlikely (!globalSubrs->sanitize (&sc)) ||
435 (fdArray == &Null (CFF2FDArray)) || unlikely (!fdArray->sanitize (&sc)) ||
436 (((fdSelect != &Null (CFF2FDSelect)) && unlikely (!fdSelect->sanitize (&sc, fdArray->count)))))
439 num_glyphs = charStrings->count;
440 if (num_glyphs != sc.get_num_glyphs ())
443 fdCount = fdArray->count;
444 privateDicts.resize (fdCount);
446 /* parse font dicts and gather private dicts */
447 for (unsigned int i = 0; i < fdCount; i++)
449 const byte_str_t fontDictStr = (*fdArray)[i];
450 if (unlikely (!fontDictStr.sanitize (&sc))) { fini (); return; }
451 cff2_font_dict_values_t *font;
452 cff2_font_dict_interpreter_t font_interp;
453 font_interp.env.init (fontDictStr);
454 font = fontDicts.push ();
455 if (unlikely (font == &Crap (cff2_font_dict_values_t))) { fini (); return; }
457 if (unlikely (!font_interp.interpret (*font))) { fini (); return; }
459 const byte_str_t privDictStr (StructAtOffsetOrNull<UnsizedByteStr> (cff2, font->privateDictInfo.offset), font->privateDictInfo.size);
460 if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
461 dict_interpreter_t<PRIVOPSET, PRIVDICTVAL, cff2_priv_dict_interp_env_t> priv_interp;
462 priv_interp.env.init(privDictStr);
463 privateDicts[i].init ();
464 if (unlikely (!priv_interp.interpret (privateDicts[i]))) { fini (); return; }
466 privateDicts[i].localSubrs = &StructAtOffsetOrNull<CFF2Subrs> (&privDictStr[0], privateDicts[i].subrsOffset);
467 if (privateDicts[i].localSubrs != &Null (CFF2Subrs) &&
468 unlikely (!privateDicts[i].localSubrs->sanitize (&sc)))
475 sc.end_processing ();
477 fontDicts.fini_deep ();
478 privateDicts.fini_deep ();
479 hb_blob_destroy (blob);
483 bool is_valid () const { return blob; }
487 hb_sanitize_context_t sc;
490 cff2_top_dict_values_t topDict;
491 const CFF2Subrs *globalSubrs;
492 const CFF2VariationStore *varStore;
493 const CFF2CharStrings *charStrings;
494 const CFF2FDArray *fdArray;
495 const CFF2FDSelect *fdSelect;
496 unsigned int fdCount;
498 hb_vector_t<cff2_font_dict_values_t> fontDicts;
499 hb_vector_t<PRIVDICTVAL> privateDicts;
501 unsigned int num_glyphs;
504 struct accelerator_t : accelerator_templ_t<cff2_private_dict_opset_t, cff2_private_dict_values_t>
506 HB_INTERNAL bool get_extents (hb_font_t *font,
507 hb_codepoint_t glyph,
508 hb_glyph_extents_t *extents) const;
509 #ifdef HB_EXPERIMENTAL_API
510 HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, draw_helper_t &draw_helper) const;
514 typedef accelerator_templ_t<cff2_private_dict_opset_subset_t, cff2_private_dict_values_subset_t> accelerator_subset_t;
516 bool subset (hb_subset_context_t *c) const { return hb_subset_cff2 (c); }
519 FixedVersion<HBUINT8> version; /* Version of CFF2 table. set to 0x0200u */
520 NNOffsetTo<TopDict, HBUINT8> topDict; /* headerSize = Offset to Top DICT. */
521 HBUINT16 topDictSize; /* Top DICT size */
524 DEFINE_SIZE_STATIC (5);
527 struct cff2_accelerator_t : cff2::accelerator_t {};
530 #endif /* HB_OT_CFF2_TABLE_HH */