zfont1.c 24 KB
Newer Older
1
/* Copyright (C) 2001-2019 Artifex Software, Inc.
2
   All Rights Reserved.
3

4 5 6
   This software is provided AS-IS with no warranty, either express or
   implied.

7 8 9 10 11
   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
12 13
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
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
/* Type 1 and Type 4 font creation operators */
#include "memory_.h"
#include "ghost.h"
#include "oper.h"
#include "gxfixed.h"
#include "gsmatrix.h"
#include "gxdevice.h"
#include "gxfont.h"
#include "gxfont1.h"
#include "bfont.h"
#include "ialloc.h"
#include "icharout.h"
#include "ichar1.h"
#include "idict.h"
#include "idparam.h"
#include "ifont1.h"
#include "iname.h"		/* for name_index in enumerate_glyph */
#include "store.h"

/* Type 1 font procedures (defined in zchar1.c) */
extern const gs_type1_data_procs_t z1_data_procs;
font_proc_glyph_info(z1_glyph_info);
/* Font procedures defined here */
static font_proc_same_font(z1_same_font);

/* ------ Private utilities ------ */

static void
find_zone_height(float *pmax_height, int count, const float *values)
{
    int i;
    float zone_height;

    for (i = 0; i < count; i += 2)
51 52
        if ((zone_height = values[i + 1] - values[i]) > *pmax_height)
            *pmax_height = zone_height;
53 54 55 56 57 58
}

/* ------ Font procedures ------ */

static int
z1_enumerate_glyph(gs_font * pfont, int *pindex, gs_glyph_space_t ignored,
59
                   gs_glyph * pglyph)
60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
{
    const gs_font_type1 *const pfont1 = (gs_font_type1 *)pfont;
    const ref *pcsdict = &pfont_data(pfont1)->CharStrings;

    return zchar_enumerate_glyph(pfont->memory, pcsdict, pindex, pglyph);
}

/* ------ Public procedures ------ */

/* Extract pointers to internal structures. */
int
charstring_font_get_refs(const_os_ptr op, charstring_font_refs_t *pfr)
{
    check_type(*op, t_dictionary);
    if (dict_find_string(op, "Private", &pfr->Private) <= 0 ||
75 76
        !r_has_type(pfr->Private, t_dictionary)
        )
77
        return_error(gs_error_invalidfont);
78 79
    make_empty_array(&pfr->no_subrs, 0);
    if (dict_find_string(pfr->Private, "OtherSubrs", &pfr->OtherSubrs) > 0) {
80
        if (!r_is_array(pfr->OtherSubrs))
81
            return_error(gs_error_typecheck);
82
    } else
83
        pfr->OtherSubrs = &pfr->no_subrs;
84
    if (dict_find_string(pfr->Private, "Subrs", &pfr->Subrs) > 0) {
85
        if (!r_is_array(pfr->Subrs))
86
            return_error(gs_error_typecheck);
87
    } else
88
        pfr->Subrs = &pfr->no_subrs;
89 90 91 92
    pfr->GlobalSubrs = &pfr->no_subrs;
    return 0;
}

93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428
static int
charstring_check_mm_params(ref *fdict, unsigned int ndesigns)
{
    ref *p1;
    ref p2, p3;
    ref *Blend, *FInfo, *BFInfo, *BPriv;
    int code;
    int i, j;
    gs_memory_t *mem = dict_mem(fdict->value.pdict);

    code = dict_find_string(fdict, "$Blend", &p1);
    if (code < 0 || !r_is_proc(p1))
        goto bad;

    code = dict_find_string(fdict, "FontInfo", &FInfo);
    if (code < 0 || !r_has_type(FInfo, t_dictionary))
        goto bad;

    code = dict_find_string(FInfo, "BlendAxisTypes", &p1);
    if (code < 0 || !r_is_array(p1))
        goto bad;
    for (i = 0; i < r_size(p1); i ++) {
        code = array_get(mem, p1, i, &p2);
        if (code < 0 || !r_has_type(&p2, t_name))
            goto bad;
    }
    code = dict_find_string(FInfo, "BlendDesignPositions", &p1);
    if (code < 0 || !r_is_array(p1))
        goto bad;
    for (i = 0; i < r_size(p1); i++) {
        code = array_get(mem, p1, i, &p2);
        if (code < 0 || !r_is_array(&p2)) {
            goto bad;
        }
        else {
            for (j = 0; j < r_size(&p2); j++) {
                code = array_get(mem, &p2, j, &p3);
                if (code < 0 || !r_has_type(&p3, t_integer))
                    goto bad;
            }
        }
    }
    code = dict_find_string(FInfo, "BlendDesignMap", &p1);
    if (code < 0 || !r_is_array(p1))
        goto bad;
    for (i = 0; i < r_size(p1); i++) {
        code = array_get(mem, p1, i , &p2);
        if (code < 0 || !r_is_array(&p2)) {
            goto bad;
        }
        else {
            for (j = 0; j < r_size(&p2); j++) {
                code = array_get(mem, &p2, j, &p3);
                if (code < 0 || !r_is_array(&p3))
                    goto bad;
                else {
                    ref p5;
                    int k;
                    for (k = 0; k < r_size(&p3); k++) {
                        code = array_get(mem, &p3, k, &p5);
                        if (code < 0 || !r_is_number(&p5))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(fdict, "Blend", &Blend);
    if (code < 0 || !r_has_type(Blend, t_dictionary))
        goto bad;
    code = dict_find_string(Blend, "FontBBox", &p1);
    if (code < 0 || !r_is_array(p1))
        goto bad;
    for (i = 0; i < r_size(p1); i++) {
         code = array_get(mem, p1, i, &p2);
         if (code < 0 || !r_is_array(&p2)) {
             goto bad;
         }
         else {
             for (j = 0; j < r_size(&p2); j++) {
                 code = array_get(mem, &p2, j, &p3);
                 if (code < 0 || !r_is_number(&p3))
                     goto bad;
             }
         }
    }
    code = dict_find_string(Blend, "Private", &BPriv);
    if (code < 0 || !r_has_type(BPriv, t_dictionary))
        goto bad;
    code = dict_find_string(BPriv, "BlueValues", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++) {
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2)) {
                    goto bad;
                }
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_has_type(&p3, t_integer))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "OtherBlues", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++) {
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_has_type(&p3, t_integer))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "StdHW", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_is_number(&p3))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "StdVW", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_is_number(&p3))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "StemSnapH,", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_is_number(&p3))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "StemSnapV", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_is_number(&p3))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "BlueScale", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++) {
                code = array_get(mem, p1, i, &p3);
                if (code < 0 || !r_is_number(&p3))
                    goto bad;
            }
        }
    }
    code = dict_find_string(BPriv, "BlueShift", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++) {
                code = array_get(mem, p1, i, &p3);
                if (code < 0 || !r_has_type(&p3, t_integer))
                    goto bad;
            }
        }
    }
    code = dict_find_string(BPriv, "FamilyBlues", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_has_type(&p3, t_integer))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "FamilyOtherBlues", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++){
                code = array_get(mem, p1, i, &p2);
                if (code < 0 || !r_is_array(&p2))
                    goto bad;
                else {
                    for (j = 0; j < r_size(&p2); j++) {
                        code = array_get(mem, &p2, j, &p3);
                        if (code < 0 || !r_has_type(&p3, t_integer))
                            goto bad;
                    }
                }
            }
        }
    }
    code = dict_find_string(BPriv, "ForceBold", &p1);
    if (code > 0) {
        if (!r_is_array(p1)) {
            goto bad;
        }
        else {
            for (i = 0; i < r_size(p1); i++) {
                code = array_get(mem, p1, i, &p3);
                if (code < 0 || !r_has_type(&p3, t_boolean))
                    goto bad;
            }
        }
    }
    code = dict_find_string(Blend, "FontInfo", &BFInfo);
    if (code > 0 && r_has_type(BFInfo, t_dictionary)) {
        code = dict_find_string(BFInfo, "UnderlinePosition", &p1);
        if (code > 0) {
            if (!r_is_array(p1)) {
                goto bad;
            }
            else {
                for (i = 0; i < r_size(p1); i++) {
                    code = array_get(mem, p1, i, &p3);
                    if (code < 0 || !r_is_number(&p3))
                        goto bad;
                }
            }
        }
        code = dict_find_string(BFInfo, "UnderlineThickness", &p1);
        if (code > 0) {
            if (!r_is_array(p1)) {
                goto bad;
            }
            else {
                for (i = 0; i < r_size(p1); i++) {
                    code = array_get(mem, p1, i, &p3);
                    if (code < 0 || !r_is_number(&p3))
                        goto bad;
                }
            }
        }
        code = dict_find_string(BFInfo, "ItalicAngle", &p1);
        if (code > 0) {
            if (!r_is_array(p1)) {
                goto bad;
            }
            else {
                for (i = 0; i < r_size(p1); i++) {
                    code = array_get(mem, p1, i, &p3);
                    if (code < 0 || !r_is_number(&p3))
                        goto bad;
                }
            }
        }
    }
    return 0;
bad:
    return_error(gs_error_invalidfont);
}

429 430
/* Get the parameters of a CharString-based font or a FDArray entry. */
int
431 432 433
charstring_font_params(const gs_memory_t *mem,
                       const_os_ptr op, charstring_font_refs_t *pfr,
                       gs_type1_data *pdata1)
434 435 436 437 438
{
    const ref *pprivate = pfr->Private;
    int code;

    /* Get the rest of the information from the Private dictionary. */
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462
    if ((code = dict_int_param(pprivate, "lenIV", -1, 255, pdata1->lenIV, &pdata1->lenIV)) < 0)
        return code;
    if ((code = dict_uint_param(pprivate, "subroutineNumberBias",
         0, max_uint, pdata1->subroutineNumberBias, &pdata1->subroutineNumberBias)) < 0)
        return code;
    if ((code = dict_int_param(pprivate, "BlueFuzz", 0, 1999, 1, &pdata1->BlueFuzz)) < 0)
        return code;
    if ((code = dict_float_param(pprivate, "BlueScale", 0.039625, &pdata1->BlueScale)) < 0)
        return code;
    if ((code = dict_float_param(pprivate, "BlueShift", 7.0, &pdata1->BlueShift)) < 0)
        return code;
    if ((code = pdata1->BlueValues.count = dict_float_array_param(mem, pprivate, "BlueValues",
                max_BlueValues * 2, &pdata1->BlueValues.values[0], NULL)) < 0)
        return code;
    if ((code = dict_float_param(pprivate, "ExpansionFactor", 0.06, &pdata1->ExpansionFactor)) < 0)
        return code;
    if ((code = pdata1->FamilyBlues.count = dict_float_array_param(mem, pprivate, "FamilyBlues",
                max_FamilyBlues * 2, &pdata1->FamilyBlues.values[0], NULL)) < 0)
        return code;
    if ((code = pdata1->FamilyOtherBlues.count = dict_float_array_param(mem, pprivate, "FamilyOtherBlues",
                max_FamilyOtherBlues * 2, &pdata1->FamilyOtherBlues.values[0], NULL)) < 0)
        return code;
    if ((code = dict_bool_param(pprivate, "ForceBold", false, &pdata1->ForceBold)) < 0)
        return code;
463 464 465 466
    /*
     * We've seen a few fonts with out-of-range LanguageGroup values;
     * if it weren't for this, the only legal values should be 0 or 1.
     */
467 468 469 470 471 472 473 474
    if ((code = dict_int_param(pprivate, "LanguageGroup", min_int, max_int, 0, &pdata1->LanguageGroup)) < 0)
        return code;
    if ((code = pdata1->OtherBlues.count = dict_float_array_param(mem, pprivate, "OtherBlues",
                max_OtherBlues * 2, &pdata1->OtherBlues.values[0], NULL)) < 0)
        return code;
    if ((code = dict_bool_param(pprivate, "RndStemUp", true, &pdata1->RndStemUp)) < 0)
        return code;
    if ((code = pdata1->StdHW.count = dict_float_array_check_param(mem, pprivate, "StdHW",
475
                1, &pdata1->StdHW.values[0], NULL, 0, gs_error_rangecheck)) < 0)
476 477
        return code;
    if ((code = pdata1->StdVW.count = dict_float_array_check_param(mem, pprivate, "StdVW",
478
                1, &pdata1->StdVW.values[0], NULL, 0, gs_error_rangecheck)) < 0)
479 480 481 482 483 484 485
        return code;
    if ((code = pdata1->StemSnapH.count = dict_float_array_param(mem, pprivate, "StemSnapH",
                max_StemSnap, &pdata1->StemSnapH.values[0], NULL)) < 0)
        return code;
    if ((code = pdata1->StemSnapV.count = dict_float_array_param(mem, pprivate, "StemSnapV",
                max_StemSnap, &pdata1->StemSnapV.values[0], NULL)) < 0)
        return code;
486
    /* The WeightVector is in the font dictionary, not Private. */
487 488
    if ((code = pdata1->WeightVector.count = dict_float_array_param(mem, op, "WeightVector",
                max_WeightVector, pdata1->WeightVector.values, NULL)) < 0)
489
        return code;
490 491 492 493 494 495

    if (pdata1->WeightVector.count > 0) {
        code = charstring_check_mm_params((ref *)op, pdata1->WeightVector.count);
        if (code < 0)
            return code;
    }
496 497 498 499 500 501 502 503
    /*
     * According to section 5.6 of the "Adobe Type 1 Font Format",
     * there is a requirement that BlueScale times the maximum
     * alignment zone height must be less than 1.  Some fonts
     * produced by Fontographer have ridiculously large BlueScale
     * values, so we force BlueScale back into range here.
     */
    {
504
        float max_zone_height = 1.0;
505

506 507 508 509
        find_zone_height(&max_zone_height, pdata1->BlueValues.count, pdata1->BlueValues.values);
        find_zone_height(&max_zone_height, pdata1->OtherBlues.count, pdata1->OtherBlues.values);
        find_zone_height(&max_zone_height, pdata1->FamilyBlues.count, pdata1->FamilyBlues.values);
        find_zone_height(&max_zone_height, pdata1->FamilyOtherBlues.count, pdata1->FamilyOtherBlues.values);
510 511
        if (pdata1->BlueScale * max_zone_height > 1.0)
            pdata1->BlueScale = 1.0 / max_zone_height;
512 513 514 515 516 517 518 519 520
    }
    /*
     * According to the same Adobe book, section 5.11, only values
     * 0 and 1 are allowed for LanguageGroup and we have encountered
     * fonts with other values. If the value is anything else, map it to 0
     * so that the remainder of the graphics library won't see an
     * unexpected value.
     */
    if (pdata1->LanguageGroup > 1 || pdata1->LanguageGroup < 0)
521
        pdata1->LanguageGroup = 0;
522

523
    /* This is used only when determining if its possible to copy glyphs
524
     * between fonts. Currenly only by pdfwrite and friends. Rather than
525
     * check all the subrs (which we used to do) we hash tehm, store it
526
     * and check the hashes. Zero except when in use by pdfwrite..
527 528
     */
    memset(&pdata1->hash_subrs, 0x00, 16);
529 530 531 532 533 534
    return 0;
}

/* Fill in a newly built CharString-based font or FDArray entry. */
int
charstring_font_init(gs_font_type1 *pfont, const charstring_font_refs_t *pfr,
535
                     const gs_type1_data *pdata1)
536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556
{
    font_data *pdata;

    pdata = pfont_data(pfont);
    pfont->data = *pdata1;
    pfont->data.parent = NULL;
    ref_assign(&pdata->u.type1.OtherSubrs, pfr->OtherSubrs);
    ref_assign(&pdata->u.type1.Subrs, pfr->Subrs);
    ref_assign(&pdata->u.type1.GlobalSubrs, pfr->GlobalSubrs);
    pfont->data.procs = z1_data_procs;
    pfont->data.proc_data = (char *)pdata;
    pfont->procs.same_font = z1_same_font;
    pfont->procs.glyph_info = z1_glyph_info;
    pfont->procs.enumerate_glyph = z1_enumerate_glyph;
    pfont->procs.glyph_outline = zchar1_glyph_outline;
    return 0;
}

/* Build a Type 1, Type 2, or Type 4 font. */
int
build_charstring_font(i_ctx_t *i_ctx_p, os_ptr op, build_proc_refs *pbuild,
557 558
                      font_type ftype, charstring_font_refs_t *pfr,
                      gs_type1_data *pdata1, build_font_options_t options)
559 560 561 562 563
{
    int code = charstring_font_params(imemory, op, pfr, pdata1);
    gs_font_type1 *pfont;

    if (code < 0)
564
        return code;
565
    code = build_gs_primitive_font(i_ctx_p, op, (gs_font_base **)&pfont, ftype,
566
                                   &st_gs_font_type1, pbuild, options);
567
    if (code != 0)
568
        return code;
569 570
    /* This is a new font, fill it in. */
    charstring_font_init(pfont, pfr, pdata1);
571
    return define_gs_font(i_ctx_p, (gs_font *)pfont);
572 573 574 575 576 577 578
}

/* ------ Operators ------ */

/* Build a Type 1 or Type 4 font. */
static int
buildfont1or4(i_ctx_t *i_ctx_p, os_ptr op, build_proc_refs * pbuild,
579
              font_type ftype, build_font_options_t options)
580 581 582 583 584 585
{
    charstring_font_refs_t refs;
    int code = charstring_font_get_refs(op, &refs);
    gs_type1_data data1;

    if (code < 0)
586
        return code;
587 588
    data1.interpret = gs_type1_interpret;
    data1.subroutineNumberBias = 0;
589 590
    data1.gsubrNumberBias = 0;

591 592
    data1.lenIV = DEFAULT_LENIV_1;
    return build_charstring_font(i_ctx_p, op, pbuild, ftype, &refs, &data1,
593
                                 options);
594 595 596 597 598 599 600 601 602 603
}

/* <string|name> <font_dict> .buildfont1 <string|name> <font> */
/* Build a type 1 (Adobe encrypted) font. */
static int
zbuildfont1(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    build_proc_refs build;
    int code = build_proc_name_refs(imemory, &build,
604
                                    "%Type1BuildChar", "%Type1BuildGlyph");
605 606

    if (code < 0)
607
        return code;
608
    return buildfont1or4(i_ctx_p, op, &build, ft_encrypted,
609
                         bf_notdef_required);
610 611 612 613 614 615 616 617 618 619 620 621
}

/* <string|name> <font_dict> .buildfont4 <string|name> <font> */
/* Build a type 4 (disk-based Adobe encrypted) font. */
static int
zbuildfont4(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    build_proc_refs build;
    int code = build_gs_font_procs(op, &build);

    if (code < 0)
622
        return code;
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639
    return buildfont1or4(i_ctx_p, op, &build, ft_disk_based, bf_options_none);
}

/* ------ Initialization procedure ------ */

const op_def zfont1_op_defs[] =
{
    {"2.buildfont1", zbuildfont1},
    {"2.buildfont4", zbuildfont4},
    op_def_end(0)
};

/* ------ Font procedures for Type 1 fonts ------ */

/* same_font procedure */
static bool
same_font_dict(const font_data *pdata, const font_data *podata,
640
               const char *key)
641 642 643 644 645 646 647 648
{
    ref *pvalue;
    bool present = dict_find_string(&pdata->dict, key, &pvalue) > 0;
    ref *povalue;
    bool opresent = dict_find_string(&podata->dict, key, &povalue) > 0;
    dict *pdict = (&(podata->dict))->value.pdict;

    return (present == opresent &&
649
            (present <= 0 || obj_eq(dict_mem(pdict), pvalue, povalue)));
650
}
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665
static bool z1_check_data_procs_equal(const gs_type1_data_procs_t *p1, const gs_type1_data_procs_t *p2)
{
    if (p1->glyph_data != p2->glyph_data)
        return false;
    if (p1->subr_data != p2->subr_data)
        return false;
    if (p1->seac_data != p2->seac_data)
        return false;
    if (p1->push_values != p2->push_values)
        return false;
    if (p1->pop_value != p2->pop_value)
        return false;
    return true;
}

666 667 668 669
static int
z1_same_font(const gs_font *font, const gs_font *ofont, int mask)
{
    if (ofont->FontType != font->FontType)
670
        return 0;
671
    while (font->base != font)
672
        font = font->base;
673
    while (ofont->base != ofont)
674
        ofont = ofont->base;
675
    if (ofont == font)
676
        return mask;
677
    {
678 679 680 681 682 683
        int same = gs_base_same_font(font, ofont, mask);
        int check = mask & ~same;
        const gs_font_type1 *const pfont1 = (const gs_font_type1 *)font;
        const font_data *const pdata = pfont_data(pfont1);
        const gs_font_type1 *pofont1 = (const gs_font_type1 *)ofont;
        const font_data *const podata = pfont_data(pofont1);
684 685
        bool same_data_procs = z1_check_data_procs_equal(&pofont1->data.procs, &z1_data_procs);

686

687
        if ((check & (FONT_SAME_OUTLINES | FONT_SAME_METRICS)) && same_data_procs &&
688 689 690 691 692 693 694 695 696
            obj_eq(font->memory, &pdata->CharStrings, &podata->CharStrings) &&
            /*
             * We use same_font_dict for convenience: we know that
             * both fonts do have Private dictionaries.
             */
            same_font_dict(pdata, podata, "Private")
            )
            same |= FONT_SAME_OUTLINES;

697
        if ((check & FONT_SAME_METRICS) && (same & FONT_SAME_OUTLINES) && same_data_procs  &&
698 699 700 701 702 703 704 705 706 707 708 709 710 711
            /* Metrics may be affected by CDevProc, Metrics, Metrics2. */
            same_font_dict(pdata, podata, "Metrics") &&
            same_font_dict(pdata, podata, "Metrics2") &&
            same_font_dict(pdata, podata, "CDevProc")
            )
            same |= FONT_SAME_METRICS;

        if ((check & FONT_SAME_ENCODING) &&
            pofont1->procs.same_font == z1_same_font &&
            obj_eq(font->memory, &pdata->Encoding, &podata->Encoding)
            )
            same |= FONT_SAME_ENCODING;

        return same & mask;
712 713
    }
}