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