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/*
* 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
*/
#include "hb.hh"
#ifndef HB_NO_CFF
#include "hb-draw.hh"
#include "hb-algs.hh"
#include "hb-ot-cff1-table.hh"
#include "hb-cff1-interp-cs.hh"
using namespace CFF;
struct sid_to_gid_t
{
uint16_t sid;
uint8_t gid;
int cmp (uint16_t a) const
{
if (a == sid) return 0;
return (a < sid) ? -1 : 1;
}
};
/* SID to code */
static const uint8_t standard_encoding_to_code [] =
{
0, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46,
47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,
63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78,
79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94,
95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110,
111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126,
161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 177,
178, 179, 180, 182, 183, 184, 185, 186, 187, 188, 189, 191, 193, 194, 195, 196,
197, 198, 199, 200, 202, 203, 205, 206, 207, 208, 225, 227, 232, 233, 234, 235,
241, 245, 248, 249, 250, 251
};
/* SID to code */
static const uint8_t expert_encoding_to_code [] =
{
0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 44, 45, 46,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58, 59, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 47, 0, 0, 0, 0, 0, 0, 0, 0, 0, 87, 88, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 201, 0, 0, 0, 0, 189, 0, 0, 188, 0,
0, 0, 0, 190, 202, 0, 0, 0, 0, 203, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 48,
49, 50, 51, 52, 53, 54, 55, 56, 57, 60, 61, 62, 63, 65, 66, 67,
68, 69, 73, 76, 77, 78, 79, 82, 83, 84, 86, 89, 90, 91, 93, 94,
95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110,
111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126,
161, 162, 163, 166, 167, 168, 169, 170, 172, 175, 178, 179, 182, 183, 184, 191,
192, 193, 194, 195, 196, 197, 200, 204, 205, 206, 207, 208, 209, 210, 211, 212,
213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228,
229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244,
245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
};
/* glyph ID to SID */
static const uint16_t expert_charset_to_sid [] =
{
0, 1, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 13, 14, 15, 99,
239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 27, 28, 249, 250, 251, 252,
253, 254, 255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 109, 110,
267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282,
283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298,
299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314,
315, 316, 317, 318, 158, 155, 163, 319, 320, 321, 322, 323, 324, 325, 326, 150,
164, 169, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340,
341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356,
357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372,
373, 374, 375, 376, 377, 378
};
/* glyph ID to SID */
static const uint16_t expert_subset_charset_to_sid [] =
{
0, 1, 231, 232, 235, 236, 237, 238, 13, 14, 15, 99, 239, 240, 241, 242,
243, 244, 245, 246, 247, 248, 27, 28, 249, 250, 251, 253, 254, 255, 256, 257,
258, 259, 260, 261, 262, 263, 264, 265, 266, 109, 110, 267, 268, 269, 270, 272,
300, 301, 302, 305, 314, 315, 158, 155, 163, 320, 321, 322, 323, 324, 325, 326,
150, 164, 169, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339,
340, 341, 342, 343, 344, 345, 346
};
/* SID to glyph ID */
static const sid_to_gid_t expert_charset_sid_to_gid [] =
{
{ 1, 1 }, { 13, 12 }, { 14, 13 }, { 15, 14 },
{ 27, 26 }, { 28, 27 }, { 99, 15 }, { 109, 46 },
{ 110, 47 }, { 150, 111 }, { 155, 101 }, { 158, 100 },
{ 163, 102 }, { 164, 112 }, { 169, 113 }, { 229, 2 },
{ 230, 3 }, { 231, 4 }, { 232, 5 }, { 233, 6 },
{ 234, 7 }, { 235, 8 }, { 236, 9 }, { 237, 10 },
{ 238, 11 }, { 239, 16 }, { 240, 17 }, { 241, 18 },
{ 242, 19 }, { 243, 20 }, { 244, 21 }, { 245, 22 },
{ 246, 23 }, { 247, 24 }, { 248, 25 }, { 249, 28 },
{ 250, 29 }, { 251, 30 }, { 252, 31 }, { 253, 32 },
{ 254, 33 }, { 255, 34 }, { 256, 35 }, { 257, 36 },
{ 258, 37 }, { 259, 38 }, { 260, 39 }, { 261, 40 },
{ 262, 41 }, { 263, 42 }, { 264, 43 }, { 265, 44 },
{ 266, 45 }, { 267, 48 }, { 268, 49 }, { 269, 50 },
{ 270, 51 }, { 271, 52 }, { 272, 53 }, { 273, 54 },
{ 274, 55 }, { 275, 56 }, { 276, 57 }, { 277, 58 },
{ 278, 59 }, { 279, 60 }, { 280, 61 }, { 281, 62 },
{ 282, 63 }, { 283, 64 }, { 284, 65 }, { 285, 66 },
{ 286, 67 }, { 287, 68 }, { 288, 69 }, { 289, 70 },
{ 290, 71 }, { 291, 72 }, { 292, 73 }, { 293, 74 },
{ 294, 75 }, { 295, 76 }, { 296, 77 }, { 297, 78 },
{ 298, 79 }, { 299, 80 }, { 300, 81 }, { 301, 82 },
{ 302, 83 }, { 303, 84 }, { 304, 85 }, { 305, 86 },
{ 306, 87 }, { 307, 88 }, { 308, 89 }, { 309, 90 },
{ 310, 91 }, { 311, 92 }, { 312, 93 }, { 313, 94 },
{ 314, 95 }, { 315, 96 }, { 316, 97 }, { 317, 98 },
{ 318, 99 }, { 319, 103 }, { 320, 104 }, { 321, 105 },
{ 322, 106 }, { 323, 107 }, { 324, 108 }, { 325, 109 },
{ 326, 110 }, { 327, 114 }, { 328, 115 }, { 329, 116 },
{ 330, 117 }, { 331, 118 }, { 332, 119 }, { 333, 120 },
{ 334, 121 }, { 335, 122 }, { 336, 123 }, { 337, 124 },
{ 338, 125 }, { 339, 126 }, { 340, 127 }, { 341, 128 },
{ 342, 129 }, { 343, 130 }, { 344, 131 }, { 345, 132 },
{ 346, 133 }, { 347, 134 }, { 348, 135 }, { 349, 136 },
{ 350, 137 }, { 351, 138 }, { 352, 139 }, { 353, 140 },
{ 354, 141 }, { 355, 142 }, { 356, 143 }, { 357, 144 },
{ 358, 145 }, { 359, 146 }, { 360, 147 }, { 361, 148 },
{ 362, 149 }, { 363, 150 }, { 364, 151 }, { 365, 152 },
{ 366, 153 }, { 367, 154 }, { 368, 155 }, { 369, 156 },
{ 370, 157 }, { 371, 158 }, { 372, 159 }, { 373, 160 },
{ 374, 161 }, { 375, 162 }, { 376, 163 }, { 377, 164 },
{ 378, 165 }
};
/* SID to glyph ID */
static const sid_to_gid_t expert_subset_charset_sid_to_gid [] =
{
{ 1, 1 }, { 13, 8 }, { 14, 9 }, { 15, 10 },
{ 27, 22 }, { 28, 23 }, { 99, 11 }, { 109, 41 },
{ 110, 42 }, { 150, 64 }, { 155, 55 }, { 158, 54 },
{ 163, 56 }, { 164, 65 }, { 169, 66 }, { 231, 2 },
{ 232, 3 }, { 235, 4 }, { 236, 5 }, { 237, 6 },
{ 238, 7 }, { 239, 12 }, { 240, 13 }, { 241, 14 },
{ 242, 15 }, { 243, 16 }, { 244, 17 }, { 245, 18 },
{ 246, 19 }, { 247, 20 }, { 248, 21 }, { 249, 24 },
{ 250, 25 }, { 251, 26 }, { 253, 27 }, { 254, 28 },
{ 255, 29 }, { 256, 30 }, { 257, 31 }, { 258, 32 },
{ 259, 33 }, { 260, 34 }, { 261, 35 }, { 262, 36 },
{ 263, 37 }, { 264, 38 }, { 265, 39 }, { 266, 40 },
{ 267, 43 }, { 268, 44 }, { 269, 45 }, { 270, 46 },
{ 272, 47 }, { 300, 48 }, { 301, 49 }, { 302, 50 },
{ 305, 51 }, { 314, 52 }, { 315, 53 }, { 320, 57 },
{ 321, 58 }, { 322, 59 }, { 323, 60 }, { 324, 61 },
{ 325, 62 }, { 326, 63 }, { 327, 67 }, { 328, 68 },
{ 329, 69 }, { 330, 70 }, { 331, 71 }, { 332, 72 },
{ 333, 73 }, { 334, 74 }, { 335, 75 }, { 336, 76 },
{ 337, 77 }, { 338, 78 }, { 339, 79 }, { 340, 80 },
{ 341, 81 }, { 342, 82 }, { 343, 83 }, { 344, 84 },
{ 345, 85 }, { 346, 86 }
};
/* code to SID */
static const uint8_t standard_encoding_to_sid [] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110,
0, 111, 112, 113, 114, 0, 115, 116, 117, 118, 119, 120, 121, 122, 0, 123,
0, 124, 125, 126, 127, 128, 129, 130, 131, 0, 132, 133, 0, 134, 135, 136,
137, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 138, 0, 139, 0, 0, 0, 0, 140, 141, 142, 143, 0, 0, 0, 0,
0, 144, 0, 0, 0, 145, 0, 0, 146, 147, 148, 149, 0, 0, 0, 0
};
hb_codepoint_t OT::cff1::lookup_standard_encoding_for_code (hb_codepoint_t sid)
{
if (sid < ARRAY_LENGTH (standard_encoding_to_code))
return (hb_codepoint_t)standard_encoding_to_code[sid];
else
return 0;
}
hb_codepoint_t OT::cff1::lookup_expert_encoding_for_code (hb_codepoint_t sid)
{
if (sid < ARRAY_LENGTH (expert_encoding_to_code))
return (hb_codepoint_t)expert_encoding_to_code[sid];
else
return 0;
}
hb_codepoint_t OT::cff1::lookup_expert_charset_for_sid (hb_codepoint_t glyph)
{
if (glyph < ARRAY_LENGTH (expert_charset_to_sid))
return (hb_codepoint_t)expert_charset_to_sid[glyph];
else
return 0;
}
hb_codepoint_t OT::cff1::lookup_expert_subset_charset_for_sid (hb_codepoint_t glyph)
{
if (glyph < ARRAY_LENGTH (expert_subset_charset_to_sid))
return (hb_codepoint_t)expert_subset_charset_to_sid[glyph];
else
return 0;
}
hb_codepoint_t OT::cff1::lookup_expert_charset_for_glyph (hb_codepoint_t sid)
{
const auto *pair = hb_sorted_array (expert_charset_sid_to_gid).bsearch (sid);
return pair ? pair->gid : 0;
}
hb_codepoint_t OT::cff1::lookup_expert_subset_charset_for_glyph (hb_codepoint_t sid)
{
const auto *pair = hb_sorted_array (expert_subset_charset_sid_to_gid).bsearch (sid);
return pair ? pair->gid : 0;
}
hb_codepoint_t OT::cff1::lookup_standard_encoding_for_sid (hb_codepoint_t code)
{
if (code < ARRAY_LENGTH (standard_encoding_to_sid))
return (hb_codepoint_t)standard_encoding_to_sid[code];
else
return CFF_UNDEF_SID;
}
struct bounds_t
{
void init ()
{
min.set_int (INT_MAX, INT_MAX);
max.set_int (INT_MIN, INT_MIN);
}
void update (const point_t &pt)
{
if (pt.x < min.x) min.x = pt.x;
if (pt.x > max.x) max.x = pt.x;
if (pt.y < min.y) min.y = pt.y;
if (pt.y > max.y) max.y = pt.y;
}
void merge (const bounds_t &b)
{
if (empty ())
*this = b;
else if (!b.empty ())
{
if (b.min.x < min.x) min.x = b.min.x;
if (b.max.x > max.x) max.x = b.max.x;
if (b.min.y < min.y) min.y = b.min.y;
if (b.max.y > max.y) max.y = b.max.y;
}
}
void offset (const point_t &delta)
{
if (!empty ())
{
min.move (delta);
max.move (delta);
}
}
bool empty () const { return (min.x >= max.x) || (min.y >= max.y); }
point_t min;
point_t max;
};
struct cff1_extents_param_t
{
void init (const OT::cff1::accelerator_t *_cff)
{
path_open = false;
cff = _cff;
bounds.init ();
}
void start_path () { path_open = true; }
void end_path () { path_open = false; }
bool is_path_open () const { return path_open; }
bool path_open;
bounds_t bounds;
const OT::cff1::accelerator_t *cff;
};
struct cff1_path_procs_extents_t : path_procs_t<cff1_path_procs_extents_t, cff1_cs_interp_env_t, cff1_extents_param_t>
{
static void moveto (cff1_cs_interp_env_t &env, cff1_extents_param_t& param, const point_t &pt)
{
param.end_path ();
env.moveto (pt);
}
static void line (cff1_cs_interp_env_t &env, cff1_extents_param_t& param, const point_t &pt1)
{
if (!param.is_path_open ())
{
param.start_path ();
param.bounds.update (env.get_pt ());
}
env.moveto (pt1);
param.bounds.update (env.get_pt ());
}
static void curve (cff1_cs_interp_env_t &env, cff1_extents_param_t& param, const point_t &pt1, const point_t &pt2, const point_t &pt3)
{
if (!param.is_path_open ())
{
param.start_path ();
param.bounds.update (env.get_pt ());
}
/* include control points */
param.bounds.update (pt1);
param.bounds.update (pt2);
env.moveto (pt3);
param.bounds.update (env.get_pt ());
}
};
static bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, bounds_t &bounds, bool in_seac=false);
struct cff1_cs_opset_extents_t : cff1_cs_opset_t<cff1_cs_opset_extents_t, cff1_extents_param_t, cff1_path_procs_extents_t>
{
static void process_seac (cff1_cs_interp_env_t &env, cff1_extents_param_t& param)
{
unsigned int n = env.argStack.get_count ();
point_t delta;
delta.x = env.argStack[n-4];
delta.y = env.argStack[n-3];
hb_codepoint_t base = param.cff->std_code_to_glyph (env.argStack[n-2].to_int ());
hb_codepoint_t accent = param.cff->std_code_to_glyph (env.argStack[n-1].to_int ());
bounds_t base_bounds, accent_bounds;
if (likely (!env.in_seac && base && accent
&& _get_bounds (param.cff, base, base_bounds, true)
&& _get_bounds (param.cff, accent, accent_bounds, true)))
{
param.bounds.merge (base_bounds);
accent_bounds.offset (delta);
param.bounds.merge (accent_bounds);
}
else
env.set_error ();
}
};
bool _get_bounds (const OT::cff1::accelerator_t *cff, hb_codepoint_t glyph, bounds_t &bounds, bool in_seac)
{
bounds.init ();
if (unlikely (!cff->is_valid () || (glyph >= cff->num_glyphs))) return false;
unsigned int fd = cff->fdSelect->get_fd (glyph);
cff1_cs_interpreter_t<cff1_cs_opset_extents_t, cff1_extents_param_t> interp;
const byte_str_t str = (*cff->charStrings)[glyph];
interp.env.init (str, *cff, fd);
interp.env.set_in_seac (in_seac);
cff1_extents_param_t param;
param.init (cff);
if (unlikely (!interp.interpret (param))) return false;
bounds = param.bounds;
return true;
}
bool OT::cff1::accelerator_t::get_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) const
{
#ifdef HB_NO_OT_FONT_CFF
/* XXX Remove check when this code moves to .hh file. */
return true;
#endif
bounds_t bounds;
if (!_get_bounds (this, glyph, bounds))
return false;
if (bounds.min.x >= bounds.max.x)
{
extents->width = 0;
extents->x_bearing = 0;
}
else
{
extents->x_bearing = font->em_scalef_x (bounds.min.x.to_real ());
extents->width = font->em_scalef_x (bounds.max.x.to_real ()) - extents->x_bearing;
}
if (bounds.min.y >= bounds.max.y)
{
extents->height = 0;
extents->y_bearing = 0;
}
else
{
extents->y_bearing = font->em_scalef_y (bounds.max.y.to_real ());
extents->height = font->em_scalef_y (bounds.min.y.to_real ()) - extents->y_bearing;
}
return true;
}
struct cff1_path_param_t
{
cff1_path_param_t (const OT::cff1::accelerator_t *cff_, hb_font_t *font_,
hb_draw_session_t &draw_session_, point_t *delta_)
{
draw_session = &draw_session_;
cff = cff_;
font = font_;
delta = delta_;
}
void move_to (const point_t &p)
{
point_t point = p;
if (delta) point.move (*delta);
draw_session->move_to (font->em_fscalef_x (point.x.to_real ()), font->em_fscalef_y (point.y.to_real ()));
}
void line_to (const point_t &p)
{
point_t point = p;
if (delta) point.move (*delta);
draw_session->line_to (font->em_fscalef_x (point.x.to_real ()), font->em_fscalef_y (point.y.to_real ()));
}
void cubic_to (const point_t &p1, const point_t &p2, const point_t &p3)
{
point_t point1 = p1, point2 = p2, point3 = p3;
if (delta)
{
point1.move (*delta);
point2.move (*delta);
point3.move (*delta);
}
draw_session->cubic_to (font->em_fscalef_x (point1.x.to_real ()), font->em_fscalef_y (point1.y.to_real ()),
font->em_fscalef_x (point2.x.to_real ()), font->em_fscalef_y (point2.y.to_real ()),
font->em_fscalef_x (point3.x.to_real ()), font->em_fscalef_y (point3.y.to_real ()));
}
void end_path () { draw_session->close_path (); }
hb_font_t *font;
hb_draw_session_t *draw_session;
point_t *delta;
const OT::cff1::accelerator_t *cff;
};
struct cff1_path_procs_path_t : path_procs_t<cff1_path_procs_path_t, cff1_cs_interp_env_t, cff1_path_param_t>
{
static void moveto (cff1_cs_interp_env_t &env, cff1_path_param_t& param, const point_t &pt)
{
param.move_to (pt);
env.moveto (pt);
}
static void line (cff1_cs_interp_env_t &env, cff1_path_param_t ¶m, const point_t &pt1)
{
param.line_to (pt1);
env.moveto (pt1);
}
static void curve (cff1_cs_interp_env_t &env, cff1_path_param_t ¶m, const point_t &pt1, const point_t &pt2, const point_t &pt3)
{
param.cubic_to (pt1, pt2, pt3);
env.moveto (pt3);
}
};
static bool _get_path (const OT::cff1::accelerator_t *cff, hb_font_t *font, hb_codepoint_t glyph,
hb_draw_session_t &draw_session, bool in_seac = false, point_t *delta = nullptr);
struct cff1_cs_opset_path_t : cff1_cs_opset_t<cff1_cs_opset_path_t, cff1_path_param_t, cff1_path_procs_path_t>
{
static void process_seac (cff1_cs_interp_env_t &env, cff1_path_param_t& param)
{
/* End previous path */
param.end_path ();
unsigned int n = env.argStack.get_count ();
point_t delta;
delta.x = env.argStack[n-4];
delta.y = env.argStack[n-3];
hb_codepoint_t base = param.cff->std_code_to_glyph (env.argStack[n-2].to_int ());
hb_codepoint_t accent = param.cff->std_code_to_glyph (env.argStack[n-1].to_int ());
if (unlikely (!(!env.in_seac && base && accent
&& _get_path (param.cff, param.font, base, *param.draw_session, true)
&& _get_path (param.cff, param.font, accent, *param.draw_session, true, &delta))))
env.set_error ();
}
};
bool _get_path (const OT::cff1::accelerator_t *cff, hb_font_t *font, hb_codepoint_t glyph,
hb_draw_session_t &draw_session, bool in_seac, point_t *delta)
{
if (unlikely (!cff->is_valid () || (glyph >= cff->num_glyphs))) return false;
unsigned int fd = cff->fdSelect->get_fd (glyph);
cff1_cs_interpreter_t<cff1_cs_opset_path_t, cff1_path_param_t> interp;
const byte_str_t str = (*cff->charStrings)[glyph];
interp.env.init (str, *cff, fd);
interp.env.set_in_seac (in_seac);
cff1_path_param_t param (cff, font, draw_session, delta);
if (unlikely (!interp.interpret (param))) return false;
/* Let's end the path specially since it is called inside seac also */
param.end_path ();
return true;
}
bool OT::cff1::accelerator_t::get_path (hb_font_t *font, hb_codepoint_t glyph, hb_draw_session_t &draw_session) const
{
#ifdef HB_NO_OT_FONT_CFF
/* XXX Remove check when this code moves to .hh file. */
return true;
#endif
return _get_path (this, font, glyph, draw_session);
}
struct get_seac_param_t
{
void init (const OT::cff1::accelerator_t *_cff)
{
cff = _cff;
base = 0;
accent = 0;
}
bool has_seac () const { return base && accent; }
const OT::cff1::accelerator_t *cff;
hb_codepoint_t base;
hb_codepoint_t accent;
};
struct cff1_cs_opset_seac_t : cff1_cs_opset_t<cff1_cs_opset_seac_t, get_seac_param_t>
{
static void process_seac (cff1_cs_interp_env_t &env, get_seac_param_t& param)
{
unsigned int n = env.argStack.get_count ();
hb_codepoint_t base_char = (hb_codepoint_t)env.argStack[n-2].to_int ();
hb_codepoint_t accent_char = (hb_codepoint_t)env.argStack[n-1].to_int ();
param.base = param.cff->std_code_to_glyph (base_char);
param.accent = param.cff->std_code_to_glyph (accent_char);
}
};
bool OT::cff1::accelerator_t::get_seac_components (hb_codepoint_t glyph, hb_codepoint_t *base, hb_codepoint_t *accent) const
{
if (unlikely (!is_valid () || (glyph >= num_glyphs))) return false;
unsigned int fd = fdSelect->get_fd (glyph);
cff1_cs_interpreter_t<cff1_cs_opset_seac_t, get_seac_param_t> interp;
const byte_str_t str = (*charStrings)[glyph];
interp.env.init (str, *this, fd);
get_seac_param_t param;
param.init (this);
if (unlikely (!interp.interpret (param))) return false;
if (param.has_seac ())
{
*base = param.base;
*accent = param.accent;
return true;
}
return false;
}
#endif
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