730 lines
20 KiB
C++
730 lines
20 KiB
C++
/*
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* Copyright © 2018 Adobe Systems Incorporated.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#ifndef HB_CFF_INTERP_CS_COMMON_HH
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#define HB_CFF_INTERP_CS_COMMON_HH
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#include "hb.hh"
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#include "hb-cff-interp-common.hh"
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namespace CFF {
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using namespace OT;
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/* call stack */
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struct CallStack : Stack<SubByteStr, 10> {};
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template <typename SUBRS>
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struct BiasedSubrs
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{
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inline void init (const SUBRS &subrs_)
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{
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subrs = &subrs_;
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unsigned int nSubrs = subrs_.count;
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if (nSubrs < 1240)
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bias = 107;
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else if (nSubrs < 33900)
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bias = 1131;
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else
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bias = 32768;
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}
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inline void fini (void) {}
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const SUBRS *subrs;
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unsigned int bias;
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};
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struct Point
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{
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inline void init (void)
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{
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x.init ();
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y.init ();
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}
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inline void move_x (const Number &dx) { x += dx; }
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inline void move_y (const Number &dy) { y += dy; }
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inline void move (const Number &dx, const Number &dy) { move_x (dx); move_y (dy); }
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Number x;
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Number y;
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};
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template <typename ARG, typename SUBRS>
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struct CSInterpEnv : InterpEnv<ARG>
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{
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inline void init (const ByteStr &str, const SUBRS &globalSubrs_, const SUBRS &localSubrs_)
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{
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InterpEnv<ARG>::init (str);
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seen_moveto = true;
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seen_hintmask = false;
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hstem_count = 0;
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vstem_count = 0;
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pt.init ();
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callStack.init ();
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globalSubrs.init (globalSubrs_);
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localSubrs.init (localSubrs_);
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}
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inline void fini (void)
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{
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InterpEnv<ARG>::fini ();
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callStack.fini ();
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globalSubrs.fini ();
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localSubrs.fini ();
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}
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inline bool popSubrNum (const BiasedSubrs<SUBRS>& biasedSubrs, unsigned int &subr_num)
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{
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int n;
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if (unlikely ((!callStack.check_overflow (1) ||
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!SUPER::argStack.check_pop_int (n))))
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return false;
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n += biasedSubrs.bias;
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if (unlikely ((n < 0) || (n >= biasedSubrs.subrs->count)))
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return false;
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subr_num = (unsigned int)n;
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return true;
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}
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inline bool callSubr (const BiasedSubrs<SUBRS>& biasedSubrs)
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{
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unsigned int subr_num;
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if (unlikely (!popSubrNum (biasedSubrs, subr_num)))
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return false;
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callStack.push (SUPER::substr);
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SUPER::substr = (*biasedSubrs.subrs)[subr_num];
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return true;
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}
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inline bool returnFromSubr (void)
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{
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if (unlikely (!callStack.check_underflow ()))
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return false;
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SUPER::substr = callStack.pop ();
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return true;
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}
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inline void determine_hintmask_size (void)
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{
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if (!seen_hintmask)
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{
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vstem_count += SUPER::argStack.get_count() / 2;
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hintmask_size = (hstem_count + vstem_count + 7) >> 3;
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seen_hintmask = true;
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}
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}
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inline void set_endchar (bool endchar_flag_) { endchar_flag = endchar_flag_; }
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inline bool is_endchar (void) const { return endchar_flag; }
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inline const Number &get_x (void) const { return pt.x; }
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inline const Number &get_y (void) const { return pt.y; }
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inline const Point &get_pt (void) const { return pt; }
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inline void moveto (const Point &pt_ ) { pt = pt_; }
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inline unsigned int move_x_with_arg (unsigned int i)
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{
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pt.move_x (SUPER::argStack[i]);
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return i + 1;
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}
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inline unsigned int move_y_with_arg (unsigned int i)
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{
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pt.move_y (SUPER::argStack[i]);
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return i + 1;
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}
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inline unsigned int move_xy_with_arg (unsigned int i)
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{
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pt.move (SUPER::argStack[i], SUPER::argStack[i+1]);
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return i + 2;
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}
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public:
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bool endchar_flag;
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bool seen_moveto;
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bool seen_hintmask;
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unsigned int hstem_count;
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unsigned int vstem_count;
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unsigned int hintmask_size;
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CallStack callStack;
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BiasedSubrs<SUBRS> globalSubrs;
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BiasedSubrs<SUBRS> localSubrs;
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private:
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Point pt;
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typedef InterpEnv<ARG> SUPER;
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};
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template <typename ENV, typename PARAM>
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struct PathProcsNull
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{
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static inline void rmoveto (ENV &env, PARAM& param) {}
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static inline void hmoveto (ENV &env, PARAM& param) {}
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static inline void vmoveto (ENV &env, PARAM& param) {}
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static inline void rlineto (ENV &env, PARAM& param) {}
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static inline void hlineto (ENV &env, PARAM& param) {}
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static inline void vlineto (ENV &env, PARAM& param) {}
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static inline void rrcurveto (ENV &env, PARAM& param) {}
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static inline void rcurveline (ENV &env, PARAM& param) {}
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static inline void rlinecurve (ENV &env, PARAM& param) {}
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static inline void vvcurveto (ENV &env, PARAM& param) {}
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static inline void hhcurveto (ENV &env, PARAM& param) {}
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static inline void vhcurveto (ENV &env, PARAM& param) {}
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static inline void hvcurveto (ENV &env, PARAM& param) {}
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static inline void moveto (ENV &env, PARAM& param, const Point &pt) {}
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static inline void line (ENV &env, PARAM& param, const Point &pt1) {}
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static inline void curve (ENV &env, PARAM& param, const Point &pt1, const Point &pt2, const Point &pt3) {}
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};
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template <typename ARG, typename OPSET, typename ENV, typename PARAM, typename PATH=PathProcsNull<ENV, PARAM> >
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struct CSOpSet : OpSet<ARG>
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{
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static inline bool process_op (OpCode op, ENV &env, PARAM& param)
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{
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switch (op) {
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case OpCode_return:
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return env.returnFromSubr ();
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case OpCode_endchar:
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env.set_endchar (true);
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OPSET::flush_op (op, env, param);
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break;
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case OpCode_fixedcs:
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return env.argStack.push_fixed_from_substr (env.substr);
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case OpCode_callsubr:
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return env.callSubr (env.localSubrs);
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case OpCode_callgsubr:
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return env.callSubr (env.globalSubrs);
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case OpCode_hstem:
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case OpCode_hstemhm:
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OPSET::process_hstem (op, env, param);
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break;
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case OpCode_vstem:
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case OpCode_vstemhm:
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OPSET::process_vstem (op, env, param);
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break;
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case OpCode_hintmask:
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case OpCode_cntrmask:
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OPSET::process_hintmask (op, env, param);
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break;
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case OpCode_rmoveto:
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PATH::rmoveto (env, param);
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process_post_move (op, env, param);
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break;
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case OpCode_hmoveto:
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PATH::hmoveto (env, param);
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process_post_move (op, env, param);
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break;
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case OpCode_vmoveto:
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PATH::vmoveto (env, param);
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process_post_move (op, env, param);
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break;
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case OpCode_rlineto:
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PATH::rlineto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_hlineto:
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PATH::hlineto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_vlineto:
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PATH::vlineto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_rrcurveto:
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PATH::rrcurveto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_rcurveline:
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PATH::rcurveline (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_rlinecurve:
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PATH::rlinecurve (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_vvcurveto:
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PATH::vvcurveto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_hhcurveto:
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PATH::hhcurveto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_vhcurveto:
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PATH::vhcurveto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_hvcurveto:
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PATH::hvcurveto (env, param);
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process_post_path (op, env, param);
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break;
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case OpCode_hflex:
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case OpCode_flex:
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case OpCode_hflex1:
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case OpCode_flex1:
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OPSET::process_flex (op, env, param);
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break;
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default:
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return SUPER::process_op (op, env);
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}
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return true;
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}
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static inline void process_hstem (OpCode op, ENV &env, PARAM& param)
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{
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env.hstem_count += env.argStack.get_count () / 2;
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline void process_vstem (OpCode op, ENV &env, PARAM& param)
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{
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env.vstem_count += env.argStack.get_count () / 2;
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline void process_hintmask (OpCode op, ENV &env, PARAM& param)
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{
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env.determine_hintmask_size ();
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if (likely (env.substr.avail (env.hintmask_size)))
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{
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OPSET::flush_hintmask (op, env, param);
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env.substr.inc (env.hintmask_size);
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}
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}
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static inline void process_flex (OpCode op, ENV &env, PARAM& param)
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{
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline void process_post_move (OpCode op, ENV &env, PARAM& param)
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{
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if (!env.seen_moveto)
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{
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env.determine_hintmask_size ();
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env.seen_moveto = true;
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}
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline void process_post_path (OpCode op, ENV &env, PARAM& param)
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{
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline void flush_args_and_op (OpCode op, ENV &env, PARAM& param)
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{
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OPSET::flush_n_args_and_op (op, env.argStack.get_count (), env, param);
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}
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static inline void flush_n_args_and_op (OpCode op, unsigned int n, ENV &env, PARAM& param)
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{
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OPSET::flush_n_args (n, env, param);
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OPSET::flush_op (op, env, param);
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}
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static inline void flush_args (ENV &env, PARAM& param)
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{
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OPSET::flush_n_args (env.argStack.get_count (), env, param);
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}
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static inline void flush_n_args (unsigned int n, ENV &env, PARAM& param)
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{
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env.pop_n_args (n);
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}
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static inline void flush_op (OpCode op, ENV &env, PARAM& param)
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{
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}
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static inline void flush_hintmask (OpCode op, ENV &env, PARAM& param)
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{
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OPSET::flush_args_and_op (op, env, param);
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}
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static inline bool is_subr_op (OpCode op)
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{
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switch (op)
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{
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case OpCode_callsubr:
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case OpCode_callgsubr:
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case OpCode_return:
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return true;
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default:
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return false;
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}
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}
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protected:
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typedef OpSet<ARG> SUPER;
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};
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template <typename PATH, typename ENV, typename PARAM>
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struct PathProcs
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{
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static inline void rmoveto (ENV &env, PARAM& param)
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{
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Point pt1 = env.get_pt ();
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const Number &dy = env.argStack.pop ();
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const Number &dx = env.argStack.pop ();
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pt1.move (dx, dy);
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PATH::moveto (env, param, pt1);
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}
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static inline void hmoveto (ENV &env, PARAM& param)
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{
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Point pt1 = env.get_pt ();
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pt1.move_x (env.argStack.pop ());
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PATH::moveto (env, param, pt1);
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}
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static inline void vmoveto (ENV &env, PARAM& param)
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{
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Point pt1 = env.get_pt ();
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pt1.move_y (env.argStack.pop ());
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PATH::moveto (env, param, pt1);
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}
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static inline void rlineto (ENV &env, PARAM& param)
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{
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for (unsigned int i = 0; i + 2 <= env.argStack.get_count (); i += 2)
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{
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Point pt1 = env.get_pt ();
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pt1.move (env.argStack[i], env.argStack[i+1]);
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PATH::line (env, param, pt1);
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}
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}
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static inline void hlineto (ENV &env, PARAM& param)
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{
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Point pt1;
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unsigned int i = 0;
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for (; i + 2 <= env.argStack.get_count (); i += 2)
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{
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pt1 = env.get_pt ();
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pt1.move_x (env.argStack[i]);
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PATH::line (env, param, pt1);
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pt1.move_y (env.argStack[i+1]);
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PATH::line (env, param, pt1);
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}
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if (i < env.argStack.get_count ())
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{
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pt1 = env.get_pt ();
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pt1.move_x (env.argStack[i]);
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PATH::line (env, param, pt1);
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}
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}
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static inline void vlineto (ENV &env, PARAM& param)
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{
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Point pt1;
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unsigned int i = 0;
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for (; i + 2 <= env.argStack.get_count (); i += 2)
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{
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pt1 = env.get_pt ();
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pt1.move_y (env.argStack[i]);
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PATH::line (env, param, pt1);
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pt1.move_x (env.argStack[i+1]);
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PATH::line (env, param, pt1);
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}
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if (i < env.argStack.get_count ())
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{
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pt1 = env.get_pt ();
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pt1.move_y (env.argStack[i]);
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PATH::line (env, param, pt1);
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}
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}
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static inline void rrcurveto (ENV &env, PARAM& param)
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{
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for (unsigned int i = 0; i + 6 <= env.argStack.get_count (); i += 6)
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{
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Point pt1 = env.get_pt ();
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pt1.move (env.argStack[i], env.argStack[i+1]);
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Point pt2 = pt1;
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pt2.move (env.argStack[i+2], env.argStack[i+3]);
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Point pt3 = pt2;
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pt3.move (env.argStack[i+4], env.argStack[i+5]);
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PATH::curve (env, param, pt1, pt2, pt3);
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}
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}
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static inline void rcurveline (ENV &env, PARAM& param)
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{
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unsigned int i = 0;
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for (; i + 6 <= env.argStack.get_count (); i += 6)
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{
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Point pt1 = env.get_pt ();
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pt1.move (env.argStack[i], env.argStack[i+1]);
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Point pt2 = pt1;
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pt2.move (env.argStack[i+2], env.argStack[i+3]);
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Point pt3 = pt2;
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pt3.move (env.argStack[i+4], env.argStack[i+5]);
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PATH::curve (env, param, pt1, pt2, pt3);
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}
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for (; i + 2 <= env.argStack.get_count (); i += 2)
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{
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Point pt1 = env.get_pt ();
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pt1.move (env.argStack[i], env.argStack[i+1]);
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PATH::line (env, param, pt1);
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}
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}
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static inline void rlinecurve (ENV &env, PARAM& param)
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{
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unsigned int i = 0;
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unsigned int line_limit = (env.argStack.get_count () % 6);
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for (; i + 2 <= line_limit; i += 2)
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{
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Point pt1 = env.get_pt ();
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pt1.move (env.argStack[i], env.argStack[i+1]);
|
|
PATH::line (env, param, pt1);
|
|
}
|
|
for (; i + 6 <= env.argStack.get_count (); i += 6)
|
|
{
|
|
Point pt1 = env.get_pt ();
|
|
pt1.move (env.argStack[i], env.argStack[i+1]);
|
|
Point pt2 = pt1;
|
|
pt2.move (env.argStack[i+2], env.argStack[i+3]);
|
|
Point pt3 = pt2;
|
|
pt3.move (env.argStack[i+4], env.argStack[i+5]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
|
|
static inline void vvcurveto (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int i = 0;
|
|
Point pt1 = env.get_pt ();
|
|
if ((env.argStack.get_count () & 1) != 0)
|
|
pt1.move_x (env.argStack[i++]);
|
|
for (; i + 4 <= env.argStack.get_count (); i += 4)
|
|
{
|
|
pt1.move_y (env.argStack[i]);
|
|
Point pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
Point pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
}
|
|
}
|
|
|
|
static inline void hhcurveto (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int i = 0;
|
|
Point pt1 = env.get_pt ();
|
|
if ((env.argStack.get_count () & 1) != 0)
|
|
pt1.move_y (env.argStack[i++]);
|
|
for (; i + 4 <= env.argStack.get_count (); i += 4)
|
|
{
|
|
pt1.move_x (env.argStack[i]);
|
|
Point pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
Point pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
}
|
|
}
|
|
|
|
static inline void vhcurveto (ENV &env, PARAM& param)
|
|
{
|
|
Point pt1, pt2, pt3;
|
|
unsigned int i = 0;
|
|
if ((env.argStack.get_count () % 8) >= 4)
|
|
{
|
|
Point pt1 = env.get_pt ();
|
|
pt1.move_y (env.argStack[i]);
|
|
Point pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
Point pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+3]);
|
|
i += 4;
|
|
|
|
for (; i + 8 <= env.argStack.get_count (); i += 8)
|
|
{
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
pt1.move_x (env.argStack[i]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_y (env.argStack[i+4]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+5], env.argStack[i+6]);
|
|
pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+7]);
|
|
}
|
|
if (i < env.argStack.get_count ())
|
|
pt3.move_y (env.argStack[i]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
else
|
|
{
|
|
for (; i + 8 <= env.argStack.get_count (); i += 8)
|
|
{
|
|
pt1 = env.get_pt ();
|
|
pt1.move_y (env.argStack[i]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_x (env.argStack[i+4]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+5], env.argStack[i+6]);
|
|
pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+7]);
|
|
if ((env.argStack.get_count () - i < 16) && ((env.argStack.get_count () & 1) != 0))
|
|
pt3.move_x (env.argStack[i+8]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void hvcurveto (ENV &env, PARAM& param)
|
|
{
|
|
Point pt1, pt2, pt3;
|
|
unsigned int i = 0;
|
|
if ((env.argStack.get_count () % 8) >= 4)
|
|
{
|
|
Point pt1 = env.get_pt ();
|
|
pt1.move_x (env.argStack[i]);
|
|
Point pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
Point pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+3]);
|
|
i += 4;
|
|
|
|
for (; i + 8 <= env.argStack.get_count (); i += 8)
|
|
{
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
pt1.move_y (env.argStack[i]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_x (env.argStack[i+4]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+5], env.argStack[i+6]);
|
|
pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+7]);
|
|
}
|
|
if (i < env.argStack.get_count ())
|
|
pt3.move_x (env.argStack[i]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
else
|
|
{
|
|
for (; i + 8 <= env.argStack.get_count (); i += 8)
|
|
{
|
|
pt1 = env.get_pt ();
|
|
pt1.move_x (env.argStack[i]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+1], env.argStack[i+2]);
|
|
pt3 = pt2;
|
|
pt3.move_y (env.argStack[i+3]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_y (env.argStack[i+4]);
|
|
pt2 = pt1;
|
|
pt2.move (env.argStack[i+5], env.argStack[i+6]);
|
|
pt3 = pt2;
|
|
pt3.move_x (env.argStack[i+7]);
|
|
if ((env.argStack.get_count () - i < 16) && ((env.argStack.get_count () & 1) != 0))
|
|
pt3.move_y (env.argStack[i+8]);
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* default actions to be overridden */
|
|
static inline void moveto (ENV &env, PARAM& param, const Point &pt)
|
|
{ env.moveto (pt); }
|
|
|
|
static inline void line (ENV &env, PARAM& param, const Point &pt1)
|
|
{ PATH::moveto (env, param, pt1); }
|
|
|
|
static inline void curve (ENV &env, PARAM& param, const Point &pt1, const Point &pt2, const Point &pt3)
|
|
{ PATH::moveto (env, param, pt3); }
|
|
};
|
|
|
|
template <typename ENV, typename OPSET, typename PARAM>
|
|
struct CSInterpreter : Interpreter<ENV>
|
|
{
|
|
inline bool interpret (PARAM& param)
|
|
{
|
|
SUPER::env.set_endchar (false);
|
|
|
|
for (;;) {
|
|
OpCode op;
|
|
if (unlikely (!SUPER::env.fetch_op (op) ||
|
|
!OPSET::process_op (op, SUPER::env, param)))
|
|
return false;
|
|
if (SUPER::env.is_endchar ())
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
typedef Interpreter<ENV> SUPER;
|
|
};
|
|
|
|
} /* namespace CFF */
|
|
|
|
#endif /* HB_CFF_INTERP_CS_COMMON_HH */
|