/* * Copyright © 2018 Adobe Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Adobe Author(s): Michiharu Ariza */ #ifndef HB_CFF_INTERP_CS_COMMON_HH #define HB_CFF_INTERP_CS_COMMON_HH #include "hb.hh" #include "hb-cff-interp-common.hh" namespace CFF { using namespace OT; enum cs_type_t { CSType_CharString, CSType_GlobalSubr, CSType_LocalSubr }; struct call_context_t { void init (const byte_str_ref_t substr_=byte_str_ref_t (), cs_type_t type_=CSType_CharString, unsigned int subr_num_=0) { str_ref = substr_; type = type_; subr_num = subr_num_; } void fini () {} byte_str_ref_t str_ref; cs_type_t type; unsigned int subr_num; }; /* call stack */ const unsigned int kMaxCallLimit = 10; const unsigned int kMaxOps = 10000; struct call_stack_t : cff_stack_t<call_context_t, kMaxCallLimit> {}; template <typename SUBRS> struct biased_subrs_t { void init (const SUBRS *subrs_) { subrs = subrs_; unsigned int nSubrs = get_count (); if (nSubrs < 1240) bias = 107; else if (nSubrs < 33900) bias = 1131; else bias = 32768; } void fini () {} unsigned int get_count () const { return subrs ? subrs->count : 0; } unsigned int get_bias () const { return bias; } hb_ubytes_t operator [] (unsigned int index) const { if (unlikely (!subrs || index >= subrs->count)) return hb_ubytes_t (); else return (*subrs)[index]; } protected: unsigned int bias; const SUBRS *subrs; }; struct point_t { void set_int (int _x, int _y) { x.set_int (_x); y.set_int (_y); } void move_x (const number_t &dx) { x += dx; } void move_y (const number_t &dy) { y += dy; } void move (const number_t &dx, const number_t &dy) { move_x (dx); move_y (dy); } void move (const point_t &d) { move_x (d.x); move_y (d.y); } number_t x; number_t y; }; template <typename ARG, typename SUBRS> struct cs_interp_env_t : interp_env_t<ARG> { cs_interp_env_t (const hb_ubytes_t &str, const SUBRS *globalSubrs_, const SUBRS *localSubrs_) : interp_env_t<ARG> (str) { context.init (str, CSType_CharString); seen_moveto = true; seen_hintmask = false; hstem_count = 0; vstem_count = 0; hintmask_size = 0; pt.set_int (0, 0); globalSubrs.init (globalSubrs_); localSubrs.init (localSubrs_); } ~cs_interp_env_t () { globalSubrs.fini (); localSubrs.fini (); } bool in_error () const { return callStack.in_error () || SUPER::in_error (); } bool pop_subr_num (const biased_subrs_t<SUBRS>& biasedSubrs, unsigned int &subr_num) { subr_num = 0; int n = SUPER::argStack.pop_int (); n += biasedSubrs.get_bias (); if (unlikely ((n < 0) || ((unsigned int)n >= biasedSubrs.get_count ()))) return false; subr_num = (unsigned int)n; return true; } void call_subr (const biased_subrs_t<SUBRS>& biasedSubrs, cs_type_t type) { unsigned int subr_num = 0; if (unlikely (!pop_subr_num (biasedSubrs, subr_num) || callStack.get_count () >= kMaxCallLimit)) { SUPER::set_error (); return; } context.str_ref = SUPER::str_ref; callStack.push (context); context.init ( biasedSubrs[subr_num], type, subr_num); SUPER::str_ref = context.str_ref; } void return_from_subr () { if (unlikely (SUPER::str_ref.in_error ())) SUPER::set_error (); context = callStack.pop (); SUPER::str_ref = context.str_ref; } void determine_hintmask_size () { if (!seen_hintmask) { vstem_count += SUPER::argStack.get_count() / 2; hintmask_size = (hstem_count + vstem_count + 7) >> 3; seen_hintmask = true; } } void set_endchar (bool endchar_flag_) { endchar_flag = endchar_flag_; } bool is_endchar () const { return endchar_flag; } const number_t &get_x () const { return pt.x; } const number_t &get_y () const { return pt.y; } const point_t &get_pt () const { return pt; } void moveto (const point_t &pt_ ) { pt = pt_; } public: call_context_t context; bool endchar_flag; bool seen_moveto; bool seen_hintmask; unsigned int hstem_count; unsigned int vstem_count; unsigned int hintmask_size; call_stack_t callStack; biased_subrs_t<SUBRS> globalSubrs; biased_subrs_t<SUBRS> localSubrs; private: point_t pt; typedef interp_env_t<ARG> SUPER; }; template <typename ENV, typename PARAM> struct path_procs_null_t { static void rmoveto (ENV &env, PARAM& param) {} static void hmoveto (ENV &env, PARAM& param) {} static void vmoveto (ENV &env, PARAM& param) {} static void rlineto (ENV &env, PARAM& param) {} static void hlineto (ENV &env, PARAM& param) {} static void vlineto (ENV &env, PARAM& param) {} static void rrcurveto (ENV &env, PARAM& param) {} static void rcurveline (ENV &env, PARAM& param) {} static void rlinecurve (ENV &env, PARAM& param) {} static void vvcurveto (ENV &env, PARAM& param) {} static void hhcurveto (ENV &env, PARAM& param) {} static void vhcurveto (ENV &env, PARAM& param) {} static void hvcurveto (ENV &env, PARAM& param) {} static void moveto (ENV &env, PARAM& param, const point_t &pt) {} static void line (ENV &env, PARAM& param, const point_t &pt1) {} static void curve (ENV &env, PARAM& param, const point_t &pt1, const point_t &pt2, const point_t &pt3) {} static void hflex (ENV &env, PARAM& param) {} static void flex (ENV &env, PARAM& param) {} static void hflex1 (ENV &env, PARAM& param) {} static void flex1 (ENV &env, PARAM& param) {} }; template <typename ARG, typename OPSET, typename ENV, typename PARAM, typename PATH=path_procs_null_t<ENV, PARAM>> struct cs_opset_t : opset_t<ARG> { static void process_op (op_code_t op, ENV &env, PARAM& param) { switch (op) { case OpCode_return: env.return_from_subr (); break; case OpCode_endchar: OPSET::check_width (op, env, param); env.set_endchar (true); OPSET::flush_args_and_op (op, env, param); break; case OpCode_fixedcs: env.argStack.push_fixed_from_substr (env.str_ref); break; case OpCode_callsubr: env.call_subr (env.localSubrs, CSType_LocalSubr); break; case OpCode_callgsubr: env.call_subr (env.globalSubrs, CSType_GlobalSubr); break; case OpCode_hstem: case OpCode_hstemhm: OPSET::check_width (op, env, param); OPSET::process_hstem (op, env, param); break; case OpCode_vstem: case OpCode_vstemhm: OPSET::check_width (op, env, param); OPSET::process_vstem (op, env, param); break; case OpCode_hintmask: case OpCode_cntrmask: OPSET::check_width (op, env, param); OPSET::process_hintmask (op, env, param); break; case OpCode_rmoveto: OPSET::check_width (op, env, param); PATH::rmoveto (env, param); OPSET::process_post_move (op, env, param); break; case OpCode_hmoveto: OPSET::check_width (op, env, param); PATH::hmoveto (env, param); OPSET::process_post_move (op, env, param); break; case OpCode_vmoveto: OPSET::check_width (op, env, param); PATH::vmoveto (env, param); OPSET::process_post_move (op, env, param); break; case OpCode_rlineto: PATH::rlineto (env, param); process_post_path (op, env, param); break; case OpCode_hlineto: PATH::hlineto (env, param); process_post_path (op, env, param); break; case OpCode_vlineto: PATH::vlineto (env, param); process_post_path (op, env, param); break; case OpCode_rrcurveto: PATH::rrcurveto (env, param); process_post_path (op, env, param); break; case OpCode_rcurveline: PATH::rcurveline (env, param); process_post_path (op, env, param); break; case OpCode_rlinecurve: PATH::rlinecurve (env, param); process_post_path (op, env, param); break; case OpCode_vvcurveto: PATH::vvcurveto (env, param); process_post_path (op, env, param); break; case OpCode_hhcurveto: PATH::hhcurveto (env, param); process_post_path (op, env, param); break; case OpCode_vhcurveto: PATH::vhcurveto (env, param); process_post_path (op, env, param); break; case OpCode_hvcurveto: PATH::hvcurveto (env, param); process_post_path (op, env, param); break; case OpCode_hflex: PATH::hflex (env, param); OPSET::process_post_flex (op, env, param); break; case OpCode_flex: PATH::flex (env, param); OPSET::process_post_flex (op, env, param); break; case OpCode_hflex1: PATH::hflex1 (env, param); OPSET::process_post_flex (op, env, param); break; case OpCode_flex1: PATH::flex1 (env, param); OPSET::process_post_flex (op, env, param); break; default: SUPER::process_op (op, env); break; } } static void process_hstem (op_code_t op, ENV &env, PARAM& param) { env.hstem_count += env.argStack.get_count () / 2; OPSET::flush_args_and_op (op, env, param); } static void process_vstem (op_code_t op, ENV &env, PARAM& param) { env.vstem_count += env.argStack.get_count () / 2; OPSET::flush_args_and_op (op, env, param); } static void process_hintmask (op_code_t op, ENV &env, PARAM& param) { env.determine_hintmask_size (); if (likely (env.str_ref.avail (env.hintmask_size))) { OPSET::flush_hintmask (op, env, param); env.str_ref.inc (env.hintmask_size); } } static void process_post_flex (op_code_t op, ENV &env, PARAM& param) { OPSET::flush_args_and_op (op, env, param); } static void check_width (op_code_t op, ENV &env, PARAM& param) {} static void process_post_move (op_code_t op, ENV &env, PARAM& param) { if (!env.seen_moveto) { env.determine_hintmask_size (); env.seen_moveto = true; } OPSET::flush_args_and_op (op, env, param); } static void process_post_path (op_code_t op, ENV &env, PARAM& param) { OPSET::flush_args_and_op (op, env, param); } static void flush_args_and_op (op_code_t op, ENV &env, PARAM& param) { OPSET::flush_args (env, param); OPSET::flush_op (op, env, param); } static void flush_args (ENV &env, PARAM& param) { env.pop_n_args (env.argStack.get_count ()); } static void flush_op (op_code_t op, ENV &env, PARAM& param) { } static void flush_hintmask (op_code_t op, ENV &env, PARAM& param) { OPSET::flush_args_and_op (op, env, param); } static bool is_number_op (op_code_t op) { switch (op) { case OpCode_shortint: case OpCode_fixedcs: case OpCode_TwoBytePosInt0: case OpCode_TwoBytePosInt1: case OpCode_TwoBytePosInt2: case OpCode_TwoBytePosInt3: case OpCode_TwoByteNegInt0: case OpCode_TwoByteNegInt1: case OpCode_TwoByteNegInt2: case OpCode_TwoByteNegInt3: return true; default: /* 1-byte integer */ return (OpCode_OneByteIntFirst <= op) && (op <= OpCode_OneByteIntLast); } } protected: typedef opset_t<ARG> SUPER; }; template <typename PATH, typename ENV, typename PARAM> struct path_procs_t { static void rmoveto (ENV &env, PARAM& param) { point_t pt1 = env.get_pt (); const number_t &dy = env.pop_arg (); const number_t &dx = env.pop_arg (); pt1.move (dx, dy); PATH::moveto (env, param, pt1); } static void hmoveto (ENV &env, PARAM& param) { point_t pt1 = env.get_pt (); pt1.move_x (env.pop_arg ()); PATH::moveto (env, param, pt1); } static void vmoveto (ENV &env, PARAM& param) { point_t pt1 = env.get_pt (); pt1.move_y (env.pop_arg ()); PATH::moveto (env, param, pt1); } static void rlineto (ENV &env, PARAM& param) { for (unsigned int i = 0; i + 2 <= env.argStack.get_count (); i += 2) { point_t pt1 = env.get_pt (); pt1.move (env.eval_arg (i), env.eval_arg (i+1)); PATH::line (env, param, pt1); } } static void hlineto (ENV &env, PARAM& param) { point_t pt1; unsigned int i = 0; for (; i + 2 <= env.argStack.get_count (); i += 2) { pt1 = env.get_pt (); pt1.move_x (env.eval_arg (i)); PATH::line (env, param, pt1); pt1.move_y (env.eval_arg (i+1)); PATH::line (env, param, pt1); } if (i < env.argStack.get_count ()) { pt1 = env.get_pt (); pt1.move_x (env.eval_arg (i)); PATH::line (env, param, pt1); } } static void vlineto (ENV &env, PARAM& param) { point_t pt1; 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 */