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-cff-common.hh"
33 #include "hb-paint.hh"
38 * CFF2 -- Compact Font Format (CFF) Version 2
39 * https://docs.microsoft.com/en-us/typography/opentype/spec/cff2
41 #define HB_OT_TAG_CFF2 HB_TAG('C','F','F','2')
43 typedef CFFIndex<HBUINT32> CFF2Index;
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 hb_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 hb_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 cff2_priv_dict_interp_env_t (const hb_ubytes_t &str) :
251 num_interp_env_t (str) {}
253 void process_vsindex ()
255 if (likely (!seen_vsindex))
257 set_ivs (argStack.pop_uint ());
262 unsigned int get_ivs () const { return ivs; }
263 void set_ivs (unsigned int ivs_) { ivs = ivs_; }
266 unsigned int ivs = 0;
267 bool seen_vsindex = false;
270 struct cff2_private_dict_opset_t : dict_opset_t
272 static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_t& dictval)
280 case OpCode_BlueScale:
281 case OpCode_BlueShift:
282 case OpCode_BlueFuzz:
283 case OpCode_ExpansionFactor:
284 case OpCode_LanguageGroup:
285 case OpCode_BlueValues:
286 case OpCode_OtherBlues:
287 case OpCode_FamilyBlues:
288 case OpCode_FamilyOtherBlues:
289 case OpCode_StemSnapH:
290 case OpCode_StemSnapV:
294 dictval.subrsOffset = env.argStack.pop_uint ();
297 case OpCode_vsindexdict:
298 env.process_vsindex ();
299 dictval.ivs = env.get_ivs ();
302 case OpCode_blenddict:
306 dict_opset_t::process_op (op, env);
307 if (!env.argStack.is_empty ()) return;
311 if (unlikely (env.in_error ())) return;
313 dictval.add_op (op, env.str_ref, val);
317 struct cff2_private_dict_opset_subset_t : dict_opset_t
319 static void process_op (op_code_t op, cff2_priv_dict_interp_env_t& env, cff2_private_dict_values_subset_t& dictval)
322 case OpCode_BlueValues:
323 case OpCode_OtherBlues:
324 case OpCode_FamilyBlues:
325 case OpCode_FamilyOtherBlues:
328 case OpCode_BlueScale:
329 case OpCode_BlueShift:
330 case OpCode_BlueFuzz:
331 case OpCode_StemSnapH:
332 case OpCode_StemSnapV:
333 case OpCode_LanguageGroup:
334 case OpCode_ExpansionFactor:
338 case OpCode_blenddict:
343 dictval.subrsOffset = env.argStack.pop_uint ();
348 SUPER::process_op (op, env);
349 if (!env.argStack.is_empty ()) return;
353 if (unlikely (env.in_error ())) return;
355 dictval.add_op (op, env.str_ref);
359 typedef dict_opset_t SUPER;
362 typedef dict_interpreter_t<cff2_top_dict_opset_t, cff2_top_dict_values_t> cff2_top_dict_interpreter_t;
363 typedef dict_interpreter_t<cff2_font_dict_opset_t, cff2_font_dict_values_t> cff2_font_dict_interpreter_t;
365 struct CFF2FDArray : FDArray<HBUINT32>
367 /* FDArray::serialize does not compile without this partial specialization */
368 template <typename ITER, typename OP_SERIALIZER>
369 bool serialize (hb_serialize_context_t *c, ITER it, OP_SERIALIZER& opszr)
370 { return FDArray<HBUINT32>::serialize<cff2_font_dict_values_t, table_info_t> (c, it, opszr); }
373 } /* namespace CFF */
381 static constexpr hb_tag_t tableTag = HB_OT_TAG_CFF2;
383 bool sanitize (hb_sanitize_context_t *c) const
385 TRACE_SANITIZE (this);
386 return_trace (c->check_struct (this) &&
387 likely (version.major == 2));
390 template <typename PRIVOPSET, typename PRIVDICTVAL>
391 struct accelerator_templ_t
393 static constexpr hb_tag_t tableTag = cff2::tableTag;
395 accelerator_templ_t (hb_face_t *face)
401 privateDicts.init ();
403 this->blob = sc.reference_table<cff2> (face);
405 /* setup for run-time santization */
406 sc.init (this->blob);
407 sc.start_processing ();
409 const OT::cff2 *cff2 = this->blob->template as<OT::cff2> ();
411 if (cff2 == &Null (OT::cff2))
414 { /* parse top dict */
415 hb_ubytes_t topDictStr = (cff2 + cff2->topDict).as_ubytes (cff2->topDictSize);
416 if (unlikely (!topDictStr.sanitize (&sc))) goto fail;
417 num_interp_env_t env (topDictStr);
418 cff2_top_dict_interpreter_t top_interp (env);
420 if (unlikely (!top_interp.interpret (topDict))) goto fail;
423 globalSubrs = &StructAtOffset<CFF2Subrs> (cff2, cff2->topDict + cff2->topDictSize);
424 varStore = &StructAtOffsetOrNull<CFF2VariationStore> (cff2, topDict.vstoreOffset);
425 charStrings = &StructAtOffsetOrNull<CFF2CharStrings> (cff2, topDict.charStringsOffset);
426 fdArray = &StructAtOffsetOrNull<CFF2FDArray> (cff2, topDict.FDArrayOffset);
427 fdSelect = &StructAtOffsetOrNull<CFF2FDSelect> (cff2, topDict.FDSelectOffset);
429 if (((varStore != &Null (CFF2VariationStore)) && unlikely (!varStore->sanitize (&sc))) ||
430 (charStrings == &Null (CFF2CharStrings)) || unlikely (!charStrings->sanitize (&sc)) ||
431 (globalSubrs == &Null (CFF2Subrs)) || unlikely (!globalSubrs->sanitize (&sc)) ||
432 (fdArray == &Null (CFF2FDArray)) || unlikely (!fdArray->sanitize (&sc)) ||
433 (((fdSelect != &Null (CFF2FDSelect)) && unlikely (!fdSelect->sanitize (&sc, fdArray->count)))))
436 num_glyphs = charStrings->count;
437 if (num_glyphs != sc.get_num_glyphs ())
440 fdCount = fdArray->count;
441 if (!privateDicts.resize (fdCount))
444 /* parse font dicts and gather private dicts */
445 for (unsigned int i = 0; i < fdCount; i++)
447 const hb_ubytes_t fontDictStr = (*fdArray)[i];
448 if (unlikely (!fontDictStr.sanitize (&sc))) goto fail;
449 cff2_font_dict_values_t *font;
450 num_interp_env_t env (fontDictStr);
451 cff2_font_dict_interpreter_t font_interp (env);
452 font = fontDicts.push ();
453 if (unlikely (font == &Crap (cff2_font_dict_values_t))) goto fail;
455 if (unlikely (!font_interp.interpret (*font))) goto fail;
457 const hb_ubytes_t privDictStr = StructAtOffsetOrNull<UnsizedByteStr> (cff2, font->privateDictInfo.offset).as_ubytes (font->privateDictInfo.size);
458 if (unlikely (!privDictStr.sanitize (&sc))) goto fail;
459 cff2_priv_dict_interp_env_t env2 (privDictStr);
460 dict_interpreter_t<PRIVOPSET, PRIVDICTVAL, cff2_priv_dict_interp_env_t> priv_interp (env2);
461 privateDicts[i].init ();
462 if (unlikely (!priv_interp.interpret (privateDicts[i]))) goto fail;
464 privateDicts[i].localSubrs = &StructAtOffsetOrNull<CFF2Subrs> (&privDictStr[0], privateDicts[i].subrsOffset);
465 if (privateDicts[i].localSubrs != &Null (CFF2Subrs) &&
466 unlikely (!privateDicts[i].localSubrs->sanitize (&sc)))
475 ~accelerator_templ_t () { _fini (); }
478 sc.end_processing ();
481 privateDicts.fini ();
482 hb_blob_destroy (blob);
486 hb_vector_t<uint16_t> *create_glyph_to_sid_map () const
491 hb_blob_t *get_blob () const { return blob; }
493 bool is_valid () const { return blob; }
496 hb_sanitize_context_t sc;
499 hb_blob_t *blob = nullptr;
500 cff2_top_dict_values_t topDict;
501 const CFF2Subrs *globalSubrs = nullptr;
502 const CFF2VariationStore *varStore = nullptr;
503 const CFF2CharStrings *charStrings = nullptr;
504 const CFF2FDArray *fdArray = nullptr;
505 const CFF2FDSelect *fdSelect = nullptr;
506 unsigned int fdCount = 0;
508 hb_vector_t<cff2_font_dict_values_t> fontDicts;
509 hb_vector_t<PRIVDICTVAL> privateDicts;
511 unsigned int num_glyphs = 0;
514 struct accelerator_t : accelerator_templ_t<cff2_private_dict_opset_t, cff2_private_dict_values_t>
516 accelerator_t (hb_face_t *face) : accelerator_templ_t (face) {}
518 HB_INTERNAL bool get_extents (hb_font_t *font,
519 hb_codepoint_t glyph,
520 hb_glyph_extents_t *extents) const;
521 HB_INTERNAL bool paint_glyph (hb_font_t *font, hb_codepoint_t glyph, hb_paint_funcs_t *funcs, void *data, hb_color_t foreground) const;
522 HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, hb_draw_session_t &draw_session) const;
525 struct accelerator_subset_t : accelerator_templ_t<cff2_private_dict_opset_subset_t, cff2_private_dict_values_subset_t>
527 accelerator_subset_t (hb_face_t *face) : SUPER (face) {}
528 ~accelerator_subset_t ()
531 cff_subset_accelerator_t::destroy (cff_accelerator);
534 HB_INTERNAL bool subset (hb_subset_context_t *c) const;
535 HB_INTERNAL bool serialize (hb_serialize_context_t *c,
536 struct cff2_subset_plan &plan,
537 hb_array_t<int> normalized_coords) const;
539 mutable CFF::cff_subset_accelerator_t* cff_accelerator = nullptr;
541 typedef accelerator_templ_t<cff2_private_dict_opset_subset_t, cff2_private_dict_values_subset_t> SUPER;
545 FixedVersion<HBUINT8> version; /* Version of CFF2 table. set to 0x0200u */
546 NNOffsetTo<TopDict, HBUINT8> topDict; /* headerSize = Offset to Top DICT. */
547 HBUINT16 topDictSize; /* Top DICT size */
550 DEFINE_SIZE_STATIC (5);
553 struct cff2_accelerator_t : cff2::accelerator_t {
554 cff2_accelerator_t (hb_face_t *face) : cff2::accelerator_t (face) {}
557 struct cff2_subset_accelerator_t : cff2::accelerator_subset_t {
558 cff2_subset_accelerator_t (hb_face_t *face) : cff2::accelerator_subset_t (face) {}
563 #endif /* HB_OT_CFF2_TABLE_HH */