summaryrefslogtreecommitdiffstats
path: root/gfx/harfbuzz/src/hb-cff-interp-cs-common.hh
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/harfbuzz/src/hb-cff-interp-cs-common.hh')
-rw-r--r--gfx/harfbuzz/src/hb-cff-interp-cs-common.hh908
1 files changed, 908 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-cff-interp-cs-common.hh b/gfx/harfbuzz/src/hb-cff-interp-cs-common.hh
new file mode 100644
index 0000000000..f93c83ab45
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-cff-interp-cs-common.hh
@@ -0,0 +1,908 @@
+/*
+ * 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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 10:30:50 +0000