908 lines
24 KiB
C++
908 lines
24 KiB
C++
/*
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* Copyright © 2018 Adobe Inc.
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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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enum cs_type_t {
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CSType_CharString,
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CSType_GlobalSubr,
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CSType_LocalSubr
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};
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struct call_context_t
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{
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void init (const byte_str_ref_t substr_=byte_str_ref_t (), cs_type_t type_=CSType_CharString, unsigned int subr_num_=0)
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{
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str_ref = substr_;
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type = type_;
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subr_num = subr_num_;
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}
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void fini () {}
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byte_str_ref_t str_ref;
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cs_type_t type;
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unsigned int subr_num;
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};
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/* call stack */
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const unsigned int kMaxCallLimit = 10;
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const unsigned int kMaxOps = 10000;
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struct call_stack_t : cff_stack_t<call_context_t, kMaxCallLimit> {};
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template <typename SUBRS>
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struct biased_subrs_t
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{
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void init (const SUBRS *subrs_)
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{
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subrs = subrs_;
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unsigned int nSubrs = get_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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void fini () {}
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unsigned int get_count () const { return subrs ? subrs->count : 0; }
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unsigned int get_bias () const { return bias; }
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hb_ubytes_t operator [] (unsigned int index) const
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{
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if (unlikely (!subrs || index >= subrs->count))
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return hb_ubytes_t ();
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else
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return (*subrs)[index];
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}
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protected:
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unsigned int bias;
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const SUBRS *subrs;
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};
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struct point_t
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{
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void set_int (int _x, int _y)
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{
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x.set_int (_x);
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y.set_int (_y);
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}
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void move_x (const number_t &dx) { x += dx; }
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void move_y (const number_t &dy) { y += dy; }
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void move (const number_t &dx, const number_t &dy) { move_x (dx); move_y (dy); }
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void move (const point_t &d) { move_x (d.x); move_y (d.y); }
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number_t x;
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number_t y;
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};
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template <typename ARG, typename SUBRS>
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struct cs_interp_env_t : interp_env_t<ARG>
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{
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cs_interp_env_t (const hb_ubytes_t &str, const SUBRS *globalSubrs_, const SUBRS *localSubrs_) :
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interp_env_t<ARG> (str)
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{
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context.init (str, CSType_CharString);
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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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hintmask_size = 0;
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pt.set_int (0, 0);
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globalSubrs.init (globalSubrs_);
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localSubrs.init (localSubrs_);
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}
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~cs_interp_env_t ()
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{
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globalSubrs.fini ();
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localSubrs.fini ();
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}
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bool in_error () const
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{
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return callStack.in_error () || SUPER::in_error ();
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}
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bool pop_subr_num (const biased_subrs_t<SUBRS>& biasedSubrs, unsigned int &subr_num)
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{
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subr_num = 0;
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int n = SUPER::argStack.pop_int ();
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n += biasedSubrs.get_bias ();
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if (unlikely ((n < 0) || ((unsigned int)n >= biasedSubrs.get_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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void call_subr (const biased_subrs_t<SUBRS>& biasedSubrs, cs_type_t type)
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{
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unsigned int subr_num = 0;
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if (unlikely (!pop_subr_num (biasedSubrs, subr_num)
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|| callStack.get_count () >= kMaxCallLimit))
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{
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SUPER::set_error ();
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return;
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}
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context.str_ref = SUPER::str_ref;
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callStack.push (context);
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context.init ( biasedSubrs[subr_num], type, subr_num);
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SUPER::str_ref = context.str_ref;
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}
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void return_from_subr ()
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{
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if (unlikely (SUPER::str_ref.in_error ()))
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SUPER::set_error ();
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context = callStack.pop ();
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SUPER::str_ref = context.str_ref;
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}
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void determine_hintmask_size ()
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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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void set_endchar (bool endchar_flag_) { endchar_flag = endchar_flag_; }
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bool is_endchar () const { return endchar_flag; }
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const number_t &get_x () const { return pt.x; }
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const number_t &get_y () const { return pt.y; }
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const point_t &get_pt () const { return pt; }
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void moveto (const point_t &pt_ ) { pt = pt_; }
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public:
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call_context_t context;
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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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call_stack_t callStack;
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biased_subrs_t<SUBRS> globalSubrs;
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biased_subrs_t<SUBRS> localSubrs;
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private:
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point_t pt;
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typedef interp_env_t<ARG> SUPER;
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};
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template <typename ENV, typename PARAM>
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struct path_procs_null_t
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{
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static void rmoveto (ENV &env, PARAM& param) {}
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static void hmoveto (ENV &env, PARAM& param) {}
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static void vmoveto (ENV &env, PARAM& param) {}
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static void rlineto (ENV &env, PARAM& param) {}
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static void hlineto (ENV &env, PARAM& param) {}
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static void vlineto (ENV &env, PARAM& param) {}
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static void rrcurveto (ENV &env, PARAM& param) {}
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static void rcurveline (ENV &env, PARAM& param) {}
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static void rlinecurve (ENV &env, PARAM& param) {}
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static void vvcurveto (ENV &env, PARAM& param) {}
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static void hhcurveto (ENV &env, PARAM& param) {}
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static void vhcurveto (ENV &env, PARAM& param) {}
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static void hvcurveto (ENV &env, PARAM& param) {}
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static void moveto (ENV &env, PARAM& param, const point_t &pt) {}
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static void line (ENV &env, PARAM& param, const point_t &pt1) {}
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static void curve (ENV &env, PARAM& param, const point_t &pt1, const point_t &pt2, const point_t &pt3) {}
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static void hflex (ENV &env, PARAM& param) {}
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static void flex (ENV &env, PARAM& param) {}
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static void hflex1 (ENV &env, PARAM& param) {}
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static void flex1 (ENV &env, PARAM& param) {}
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};
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template <typename ARG, typename OPSET, typename ENV, typename PARAM, typename PATH=path_procs_null_t<ENV, PARAM>>
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struct cs_opset_t : opset_t<ARG>
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{
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static void process_op (op_code_t 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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env.return_from_subr ();
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break;
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case OpCode_endchar:
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OPSET::check_width (op, env, param);
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env.set_endchar (true);
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OPSET::flush_args_and_op (op, env, param);
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break;
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case OpCode_fixedcs:
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env.argStack.push_fixed_from_substr (env.str_ref);
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break;
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case OpCode_callsubr:
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env.call_subr (env.localSubrs, CSType_LocalSubr);
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break;
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case OpCode_callgsubr:
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env.call_subr (env.globalSubrs, CSType_GlobalSubr);
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break;
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case OpCode_hstem:
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case OpCode_hstemhm:
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OPSET::check_width (op, env, param);
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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::check_width (op, env, param);
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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::check_width (op, env, param);
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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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OPSET::check_width (op, env, param);
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PATH::rmoveto (env, param);
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OPSET::process_post_move (op, env, param);
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break;
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case OpCode_hmoveto:
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OPSET::check_width (op, env, param);
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PATH::hmoveto (env, param);
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OPSET::process_post_move (op, env, param);
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break;
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case OpCode_vmoveto:
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OPSET::check_width (op, env, param);
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PATH::vmoveto (env, param);
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OPSET::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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PATH::hflex (env, param);
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OPSET::process_post_flex (op, env, param);
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break;
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case OpCode_flex:
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PATH::flex (env, param);
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OPSET::process_post_flex (op, env, param);
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break;
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case OpCode_hflex1:
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PATH::hflex1 (env, param);
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OPSET::process_post_flex (op, env, param);
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break;
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case OpCode_flex1:
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PATH::flex1 (env, param);
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OPSET::process_post_flex (op, env, param);
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break;
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default:
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SUPER::process_op (op, env);
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break;
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}
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}
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static void process_hstem (op_code_t 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 void process_vstem (op_code_t 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 void process_hintmask (op_code_t op, ENV &env, PARAM& param)
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{
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env.determine_hintmask_size ();
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if (likely (env.str_ref.avail (env.hintmask_size)))
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{
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OPSET::flush_hintmask (op, env, param);
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env.str_ref.inc (env.hintmask_size);
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}
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}
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static void process_post_flex (op_code_t 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 void check_width (op_code_t op, ENV &env, PARAM& param)
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{}
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static void process_post_move (op_code_t 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 void process_post_path (op_code_t 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 void flush_args_and_op (op_code_t op, ENV &env, PARAM& param)
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{
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OPSET::flush_args (env, param);
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OPSET::flush_op (op, env, param);
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}
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static void flush_args (ENV &env, PARAM& param)
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{
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env.pop_n_args (env.argStack.get_count ());
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}
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static void flush_op (op_code_t op, ENV &env, PARAM& param)
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{
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}
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static void flush_hintmask (op_code_t 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 bool is_number_op (op_code_t op)
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{
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switch (op)
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{
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case OpCode_shortint:
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case OpCode_fixedcs:
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case OpCode_TwoBytePosInt0: case OpCode_TwoBytePosInt1:
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case OpCode_TwoBytePosInt2: case OpCode_TwoBytePosInt3:
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case OpCode_TwoByteNegInt0: case OpCode_TwoByteNegInt1:
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case OpCode_TwoByteNegInt2: case OpCode_TwoByteNegInt3:
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return true;
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default:
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/* 1-byte integer */
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return (OpCode_OneByteIntFirst <= op) && (op <= OpCode_OneByteIntLast);
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}
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}
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protected:
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typedef opset_t<ARG> SUPER;
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};
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template <typename PATH, typename ENV, typename PARAM>
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struct path_procs_t
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{
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static void rmoveto (ENV &env, PARAM& param)
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{
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point_t pt1 = env.get_pt ();
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const number_t &dy = env.pop_arg ();
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const number_t &dx = env.pop_arg ();
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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 void hmoveto (ENV &env, PARAM& param)
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{
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point_t pt1 = env.get_pt ();
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pt1.move_x (env.pop_arg ());
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PATH::moveto (env, param, pt1);
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}
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static void vmoveto (ENV &env, PARAM& param)
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{
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point_t pt1 = env.get_pt ();
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pt1.move_y (env.pop_arg ());
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PATH::moveto (env, param, pt1);
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}
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static 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_t pt1 = env.get_pt ();
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pt1.move (env.eval_arg (i), env.eval_arg (i+1));
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PATH::line (env, param, pt1);
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}
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}
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static void hlineto (ENV &env, PARAM& param)
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{
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point_t 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.eval_arg (i));
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PATH::line (env, param, pt1);
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pt1.move_y (env.eval_arg (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.eval_arg (i));
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PATH::line (env, param, pt1);
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}
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}
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static void vlineto (ENV &env, PARAM& param)
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{
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point_t pt1;
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unsigned int i = 0;
|
|
for (; i + 2 <= env.argStack.get_count (); i += 2)
|
|
{
|
|
pt1 = env.get_pt ();
|
|
pt1.move_y (env.eval_arg (i));
|
|
PATH::line (env, param, pt1);
|
|
pt1.move_x (env.eval_arg (i+1));
|
|
PATH::line (env, param, pt1);
|
|
}
|
|
if (i < env.argStack.get_count ())
|
|
{
|
|
pt1 = env.get_pt ();
|
|
pt1.move_y (env.eval_arg (i));
|
|
PATH::line (env, param, pt1);
|
|
}
|
|
}
|
|
|
|
static void rrcurveto (ENV &env, PARAM& param)
|
|
{
|
|
for (unsigned int i = 0; i + 6 <= env.argStack.get_count (); i += 6)
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+2), env.eval_arg (i+3));
|
|
point_t pt3 = pt2;
|
|
pt3.move (env.eval_arg (i+4), env.eval_arg (i+5));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
|
|
static void rcurveline (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int arg_count = env.argStack.get_count ();
|
|
if (unlikely (arg_count < 8))
|
|
return;
|
|
|
|
unsigned int i = 0;
|
|
unsigned int curve_limit = arg_count - 2;
|
|
for (; i + 6 <= curve_limit; i += 6)
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+2), env.eval_arg (i+3));
|
|
point_t pt3 = pt2;
|
|
pt3.move (env.eval_arg (i+4), env.eval_arg (i+5));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
PATH::line (env, param, pt1);
|
|
}
|
|
|
|
static void rlinecurve (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int arg_count = env.argStack.get_count ();
|
|
if (unlikely (arg_count < 8))
|
|
return;
|
|
|
|
unsigned int i = 0;
|
|
unsigned int line_limit = arg_count - 6;
|
|
for (; i + 2 <= line_limit; i += 2)
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
PATH::line (env, param, pt1);
|
|
}
|
|
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+2), env.eval_arg (i+3));
|
|
point_t pt3 = pt2;
|
|
pt3.move (env.eval_arg (i+4), env.eval_arg (i+5));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
|
|
static void vvcurveto (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int i = 0;
|
|
point_t pt1 = env.get_pt ();
|
|
if ((env.argStack.get_count () & 1) != 0)
|
|
pt1.move_x (env.eval_arg (i++));
|
|
for (; i + 4 <= env.argStack.get_count (); i += 4)
|
|
{
|
|
pt1.move_y (env.eval_arg (i));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
point_t pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
}
|
|
}
|
|
|
|
static void hhcurveto (ENV &env, PARAM& param)
|
|
{
|
|
unsigned int i = 0;
|
|
point_t pt1 = env.get_pt ();
|
|
if ((env.argStack.get_count () & 1) != 0)
|
|
pt1.move_y (env.eval_arg (i++));
|
|
for (; i + 4 <= env.argStack.get_count (); i += 4)
|
|
{
|
|
pt1.move_x (env.eval_arg (i));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
point_t pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
pt1 = env.get_pt ();
|
|
}
|
|
}
|
|
|
|
static void vhcurveto (ENV &env, PARAM& param)
|
|
{
|
|
point_t pt1, pt2, pt3;
|
|
unsigned int i = 0;
|
|
if ((env.argStack.get_count () % 8) >= 4)
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move_y (env.eval_arg (i));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
point_t pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (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.eval_arg (i));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_y (env.eval_arg (i+4));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+5), env.eval_arg (i+6));
|
|
pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (i+7));
|
|
}
|
|
if (i < env.argStack.get_count ())
|
|
pt3.move_y (env.eval_arg (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.eval_arg (i));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_x (env.eval_arg (i+4));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+5), env.eval_arg (i+6));
|
|
pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (i+7));
|
|
if ((env.argStack.get_count () - i < 16) && ((env.argStack.get_count () & 1) != 0))
|
|
pt3.move_x (env.eval_arg (i+8));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void hvcurveto (ENV &env, PARAM& param)
|
|
{
|
|
point_t pt1, pt2, pt3;
|
|
unsigned int i = 0;
|
|
if ((env.argStack.get_count () % 8) >= 4)
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move_x (env.eval_arg (i));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
point_t pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (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.eval_arg (i));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_x (env.eval_arg (i+4));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+5), env.eval_arg (i+6));
|
|
pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (i+7));
|
|
}
|
|
if (i < env.argStack.get_count ())
|
|
pt3.move_x (env.eval_arg (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.eval_arg (i));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+1), env.eval_arg (i+2));
|
|
pt3 = pt2;
|
|
pt3.move_y (env.eval_arg (i+3));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
|
|
pt1 = pt3;
|
|
pt1.move_y (env.eval_arg (i+4));
|
|
pt2 = pt1;
|
|
pt2.move (env.eval_arg (i+5), env.eval_arg (i+6));
|
|
pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (i+7));
|
|
if ((env.argStack.get_count () - i < 16) && ((env.argStack.get_count () & 1) != 0))
|
|
pt3.move_y (env.eval_arg (i+8));
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* default actions to be overridden */
|
|
static void moveto (ENV &env, PARAM& param, const point_t &pt)
|
|
{ env.moveto (pt); }
|
|
|
|
static void line (ENV &env, PARAM& param, const point_t &pt1)
|
|
{ PATH::moveto (env, param, pt1); }
|
|
|
|
static void curve (ENV &env, PARAM& param, const point_t &pt1, const point_t &pt2, const point_t &pt3)
|
|
{ PATH::moveto (env, param, pt3); }
|
|
|
|
static void hflex (ENV &env, PARAM& param)
|
|
{
|
|
if (likely (env.argStack.get_count () == 7))
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move_x (env.eval_arg (0));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (1), env.eval_arg (2));
|
|
point_t pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (3));
|
|
point_t pt4 = pt3;
|
|
pt4.move_x (env.eval_arg (4));
|
|
point_t pt5 = pt4;
|
|
pt5.move_x (env.eval_arg (5));
|
|
pt5.y = pt1.y;
|
|
point_t pt6 = pt5;
|
|
pt6.move_x (env.eval_arg (6));
|
|
|
|
curve2 (env, param, pt1, pt2, pt3, pt4, pt5, pt6);
|
|
}
|
|
else
|
|
env.set_error ();
|
|
}
|
|
|
|
static void flex (ENV &env, PARAM& param)
|
|
{
|
|
if (likely (env.argStack.get_count () == 13))
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (0), env.eval_arg (1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (2), env.eval_arg (3));
|
|
point_t pt3 = pt2;
|
|
pt3.move (env.eval_arg (4), env.eval_arg (5));
|
|
point_t pt4 = pt3;
|
|
pt4.move (env.eval_arg (6), env.eval_arg (7));
|
|
point_t pt5 = pt4;
|
|
pt5.move (env.eval_arg (8), env.eval_arg (9));
|
|
point_t pt6 = pt5;
|
|
pt6.move (env.eval_arg (10), env.eval_arg (11));
|
|
|
|
curve2 (env, param, pt1, pt2, pt3, pt4, pt5, pt6);
|
|
}
|
|
else
|
|
env.set_error ();
|
|
}
|
|
|
|
static void hflex1 (ENV &env, PARAM& param)
|
|
{
|
|
if (likely (env.argStack.get_count () == 9))
|
|
{
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (0), env.eval_arg (1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (2), env.eval_arg (3));
|
|
point_t pt3 = pt2;
|
|
pt3.move_x (env.eval_arg (4));
|
|
point_t pt4 = pt3;
|
|
pt4.move_x (env.eval_arg (5));
|
|
point_t pt5 = pt4;
|
|
pt5.move (env.eval_arg (6), env.eval_arg (7));
|
|
point_t pt6 = pt5;
|
|
pt6.move_x (env.eval_arg (8));
|
|
pt6.y = env.get_pt ().y;
|
|
|
|
curve2 (env, param, pt1, pt2, pt3, pt4, pt5, pt6);
|
|
}
|
|
else
|
|
env.set_error ();
|
|
}
|
|
|
|
static void flex1 (ENV &env, PARAM& param)
|
|
{
|
|
if (likely (env.argStack.get_count () == 11))
|
|
{
|
|
point_t d;
|
|
for (unsigned int i = 0; i < 10; i += 2)
|
|
d.move (env.eval_arg (i), env.eval_arg (i+1));
|
|
|
|
point_t pt1 = env.get_pt ();
|
|
pt1.move (env.eval_arg (0), env.eval_arg (1));
|
|
point_t pt2 = pt1;
|
|
pt2.move (env.eval_arg (2), env.eval_arg (3));
|
|
point_t pt3 = pt2;
|
|
pt3.move (env.eval_arg (4), env.eval_arg (5));
|
|
point_t pt4 = pt3;
|
|
pt4.move (env.eval_arg (6), env.eval_arg (7));
|
|
point_t pt5 = pt4;
|
|
pt5.move (env.eval_arg (8), env.eval_arg (9));
|
|
point_t pt6 = pt5;
|
|
|
|
if (fabs (d.x.to_real ()) > fabs (d.y.to_real ()))
|
|
{
|
|
pt6.move_x (env.eval_arg (10));
|
|
pt6.y = env.get_pt ().y;
|
|
}
|
|
else
|
|
{
|
|
pt6.x = env.get_pt ().x;
|
|
pt6.move_y (env.eval_arg (10));
|
|
}
|
|
|
|
curve2 (env, param, pt1, pt2, pt3, pt4, pt5, pt6);
|
|
}
|
|
else
|
|
env.set_error ();
|
|
}
|
|
|
|
protected:
|
|
static void curve2 (ENV &env, PARAM& param,
|
|
const point_t &pt1, const point_t &pt2, const point_t &pt3,
|
|
const point_t &pt4, const point_t &pt5, const point_t &pt6)
|
|
{
|
|
PATH::curve (env, param, pt1, pt2, pt3);
|
|
PATH::curve (env, param, pt4, pt5, pt6);
|
|
}
|
|
};
|
|
|
|
template <typename ENV, typename OPSET, typename PARAM>
|
|
struct cs_interpreter_t : interpreter_t<ENV>
|
|
{
|
|
cs_interpreter_t (ENV& env_) : interpreter_t<ENV> (env_) {}
|
|
|
|
bool interpret (PARAM& param)
|
|
{
|
|
SUPER::env.set_endchar (false);
|
|
|
|
unsigned max_ops = kMaxOps;
|
|
for (;;) {
|
|
if (unlikely (!--max_ops))
|
|
{
|
|
SUPER::env.set_error ();
|
|
break;
|
|
}
|
|
OPSET::process_op (SUPER::env.fetch_op (), SUPER::env, param);
|
|
if (unlikely (SUPER::env.in_error ()))
|
|
return false;
|
|
if (SUPER::env.is_endchar ())
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
typedef interpreter_t<ENV> SUPER;
|
|
};
|
|
|
|
} /* namespace CFF */
|
|
|
|
#endif /* HB_CFF_INTERP_CS_COMMON_HH */
|