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+/* GRAPHITE2 LICENSING
+
+ Copyright 2010, SIL International
+ All rights reserved.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#pragma once
+
+#include <cstdlib>
+#include "inc/Code.h"
+
+namespace graphite2 {
+
+class Segment;
+class Face;
+class Silf;
+struct Rule;
+struct RuleEntry;
+struct State;
+class FiniteStateMachine;
+class Error;
+class ShiftCollider;
+class KernCollider;
+class json;
+
+enum passtype;
+
+class Pass
+{
+public:
+ Pass();
+ ~Pass();
+
+ bool readPass(const byte * pPass, size_t pass_length, size_t subtable_base, Face & face,
+ enum passtype pt, uint32 version, Error &e);
+ bool runGraphite(vm::Machine & m, FiniteStateMachine & fsm, bool reverse) const;
+ void init(Silf *silf) { m_silf = silf; }
+ byte collisionLoops() const { return m_numCollRuns; }
+ bool reverseDir() const { return m_isReverseDir; }
+
+ CLASS_NEW_DELETE
+private:
+ void findNDoRule(Slot* & iSlot, vm::Machine &, FiniteStateMachine& fsm) const;
+ int doAction(const vm::Machine::Code* codeptr, Slot * & slot_out, vm::Machine &) const;
+ bool testPassConstraint(vm::Machine & m) const;
+ bool testConstraint(const Rule & r, vm::Machine &) const;
+ bool readRules(const byte * rule_map, const size_t num_entries,
+ const byte *precontext, const uint16 * sort_key,
+ const uint16 * o_constraint, const byte *constraint_data,
+ const uint16 * o_action, const byte * action_data,
+ Face &, enum passtype pt, Error &e);
+ bool readStates(const byte * starts, const byte * states, const byte * o_rule_map, Face &, Error &e);
+ bool readRanges(const byte * ranges, size_t num_ranges, Error &e);
+ uint16 glyphToCol(const uint16 gid) const;
+ bool runFSM(FiniteStateMachine & fsm, Slot * slot) const;
+ void dumpRuleEventConsidered(const FiniteStateMachine & fsm, const RuleEntry & re) const;
+ void dumpRuleEventOutput(const FiniteStateMachine & fsm, vm::Machine & m, const Rule & r, Slot * os) const;
+ void adjustSlot(int delta, Slot * & slot_out, SlotMap &) const;
+ bool collisionShift(Segment *seg, int dir, json * const dbgout) const;
+ bool collisionKern(Segment *seg, int dir, json * const dbgout) const;
+ bool collisionFinish(Segment *seg, GR_MAYBE_UNUSED json * const dbgout) const;
+ bool resolveCollisions(Segment *seg, Slot *slot, Slot *start, ShiftCollider &coll, bool isRev,
+ int dir, bool &moved, bool &hasCol, json * const dbgout) const;
+ float resolveKern(Segment *seg, Slot *slot, Slot *start, KernCollider &coll, int dir,
+ float &ymin, float &ymax, json *const dbgout) const;
+
+ const Silf * m_silf;
+ uint16 * m_cols;
+ Rule * m_rules; // rules
+ RuleEntry * m_ruleMap;
+ uint16 * m_startStates; // prectxt length
+ uint16 * m_transitions;
+ State * m_states;
+ vm::Machine::Code * m_codes;
+ byte * m_progs;
+
+ byte m_numCollRuns;
+ byte m_kernColls;
+ byte m_iMaxLoop;
+ uint16 m_numGlyphs;
+ uint16 m_numRules;
+ uint16 m_numStates;
+ uint16 m_numTransition;
+ uint16 m_numSuccess;
+ uint16 m_successStart;
+ uint16 m_numColumns;
+ byte m_minPreCtxt;
+ byte m_maxPreCtxt;
+ byte m_colThreshold;
+ bool m_isReverseDir;
+ vm::Machine::Code m_cPConstraint;
+
+private: //defensive
+ Pass(const Pass&);
+ Pass& operator=(const Pass&);
+};
+
+} // namespace graphite2