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Diffstat (limited to 'gfx/graphite2/src/inc/Pass.h')
| -rw-r--r-- | gfx/graphite2/src/inc/Pass.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/gfx/graphite2/src/inc/Pass.h b/gfx/graphite2/src/inc/Pass.h new file mode 100644 index 0000000000..e687a87d8c --- /dev/null +++ b/gfx/graphite2/src/inc/Pass.h @@ -0,0 +1,118 @@ +/* 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, 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, 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 |