1 /* GRAPHITE2 LICENSING 2 3 Copyright 2010, SIL International 4 All rights reserved. 5 6 This library is free software; you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published 8 by the Free Software Foundation; either version 2.1 of License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should also have received a copy of the GNU Lesser General Public 17 License along with this library in the file named "LICENSE". 18 If not, write to the Free Software Foundation, 51 Franklin Street, 19 Suite 500, Boston, MA 02110-1335, USA or visit their web page on the 20 internet at http://www.fsf.org/licenses/lgpl.html. 21 22 Alternatively, the contents of this file may be used under the terms of the 23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public 24 License, as published by the Free Software Foundation, either version 2 25 of the License or (at your option) any later version. 26 */ 27 #pragma once 28 29 #include <cstdlib> 30 #include "inc/Code.h" 31 32 namespace graphite2 { 33 34 class Segment; 35 class Face; 36 class Silf; 37 struct Rule; 38 struct RuleEntry; 39 struct State; 40 class FiniteStateMachine; 41 class Error; 42 class ShiftCollider; 43 class KernCollider; 44 class json; 45 46 enum passtype; 47 48 class Pass 49 { 50 public: 51 Pass(); 52 ~Pass(); 53 54 bool readPass(const byte * pPass, size_t pass_length, size_t subtable_base, Face & face, 55 enum passtype pt, uint32 version, Error &e); 56 bool runGraphite(vm::Machine & m, FiniteStateMachine & fsm, bool reverse) const; init(Silf * silf)57 void init(Silf *silf) { m_silf = silf; } collisionLoops()58 byte collisionLoops() const { return m_numCollRuns; } reverseDir()59 bool reverseDir() const { return m_isReverseDir; } 60 61 CLASS_NEW_DELETE 62 private: 63 void findNDoRule(Slot* & iSlot, vm::Machine &, FiniteStateMachine& fsm) const; 64 int doAction(const vm::Machine::Code* codeptr, Slot * & slot_out, vm::Machine &) const; 65 bool testPassConstraint(vm::Machine & m) const; 66 bool testConstraint(const Rule & r, vm::Machine &) const; 67 bool readRules(const byte * rule_map, const size_t num_entries, 68 const byte *precontext, const uint16 * sort_key, 69 const uint16 * o_constraint, const byte *constraint_data, 70 const uint16 * o_action, const byte * action_data, 71 Face &, enum passtype pt, Error &e); 72 bool readStates(const byte * starts, const byte * states, const byte * o_rule_map, Face &, Error &e); 73 bool readRanges(const byte * ranges, size_t num_ranges, Error &e); 74 uint16 glyphToCol(const uint16 gid) const; 75 bool runFSM(FiniteStateMachine & fsm, Slot * slot) const; 76 void dumpRuleEventConsidered(const FiniteStateMachine & fsm, const RuleEntry & re) const; 77 void dumpRuleEventOutput(const FiniteStateMachine & fsm, const Rule & r, Slot * os) const; 78 void adjustSlot(int delta, Slot * & slot_out, SlotMap &) const; 79 bool collisionShift(Segment *seg, int dir, json * const dbgout) const; 80 bool collisionKern(Segment *seg, int dir, json * const dbgout) const; 81 bool collisionFinish(Segment *seg, GR_MAYBE_UNUSED json * const dbgout) const; 82 bool resolveCollisions(Segment *seg, Slot *slot, Slot *start, ShiftCollider &coll, bool isRev, 83 int dir, bool &moved, bool &hasCol, json * const dbgout) const; 84 float resolveKern(Segment *seg, Slot *slot, Slot *start, int dir, 85 float &ymin, float &ymax, json *const dbgout) const; 86 87 const Silf * m_silf; 88 uint16 * m_cols; 89 Rule * m_rules; // rules 90 RuleEntry * m_ruleMap; 91 uint16 * m_startStates; // prectxt length 92 uint16 * m_transitions; 93 State * m_states; 94 vm::Machine::Code * m_codes; 95 byte * m_progs; 96 97 byte m_numCollRuns; 98 byte m_kernColls; 99 byte m_iMaxLoop; 100 uint16 m_numGlyphs; 101 uint16 m_numRules; 102 uint16 m_numStates; 103 uint16 m_numTransition; 104 uint16 m_numSuccess; 105 uint16 m_successStart; 106 uint16 m_numColumns; 107 byte m_minPreCtxt; 108 byte m_maxPreCtxt; 109 byte m_colThreshold; 110 bool m_isReverseDir; 111 vm::Machine::Code m_cPConstraint; 112 113 private: //defensive 114 Pass(const Pass&); 115 Pass& operator=(const Pass&); 116 }; 117 118 } // namespace graphite2 119