src/fcmatch.c

   1 /*
   2  * $RCSId: xc/lib/fontconfig/src/fcmatch.c,v 1.20 2002/08/31 22:17:32 keithp Exp $
   3  *
   4  * Copyright © 2000 Keith Packard
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26 #include <string.h>
  27 #include <ctype.h>
  28 #include <stdio.h>
  29
  30 static double
  31 FcCompareNumber (FcValue *value1, FcValue *value2)
  32 {
  33     double  v1, v2, v;
  34
  35     switch (value1->type) {
  36     case FcTypeInteger:
  37         v1 = (double) value1->u.i;
  38         break;
  39     case FcTypeDouble:
  40         v1 = value1->u.d;
  41         break;
  42     default:
  43         return -1.0;
  44     }
  45     switch (value2->type) {
  46     case FcTypeInteger:
  47         v2 = (double) value2->u.i;
  48         break;
  49     case FcTypeDouble:
  50         v2 = value2->u.d;
  51         break;
  52     default:
  53         return -1.0;
  54     }
  55     v = v2 - v1;
  56     if (v < 0)
  57         v = -v;
  58     return v;
  59 }
  60
  61 static double
  62 FcCompareString (FcValue *v1, FcValue *v2)
  63 {
  64     return (double) FcStrCmpIgnoreCase (fc_value_string(v1), fc_value_string(v2)) != 0;
  65 }
  66
  67 static double
  68 FcCompareFamily (FcValue *v1, FcValue *v2)
  69 {
  70     /* rely on the guarantee in FcPatternAddWithBinding that
  71      * families are always FcTypeString. */
  72     const FcChar8* v1_string = fc_value_string(v1);
  73     const FcChar8* v2_string = fc_value_string(v2);
  74
  75     if (FcToLower(*v1_string) != FcToLower(*v2_string))
  76        return 1.0;
  77
  78     return (double) FcStrCmpIgnoreBlanksAndCase (v1_string, v2_string) != 0;
  79 }
  80
  81 static double
  82 FcCompareLang (FcValue *v1, FcValue *v2)
  83 {
  84     FcLangResult    result;
  85     FcValue value1 = FcValueCanonicalize(v1), value2 = FcValueCanonicalize(v2);
  86
  87     switch (value1.type) {
  88     case FcTypeLangSet:
  89         switch (value2.type) {
  90         case FcTypeLangSet:
  91             result = FcLangSetCompare (value1.u.l, value2.u.l);
  92             break;
  93         case FcTypeString:
  94             result = FcLangSetHasLang (value1.u.l,
  95                                        value2.u.s);
  96             break;
  97         default:
  98             return -1.0;
  99         }
 100         break;
 101     case FcTypeString:
 102         switch (value2.type) {
 103         case FcTypeLangSet:
 104             result = FcLangSetHasLang (value2.u.l, value1.u.s);
 105             break;
 106         case FcTypeString:
 107             result = FcLangCompare (value1.u.s,
 108                                     value2.u.s);
 109             break;
 110         default:
 111             return -1.0;
 112         }
 113         break;
 114     default:
 115         return -1.0;
 116     }
 117     switch (result) {
 118     case FcLangEqual:
 119         return 0;
 120     case FcLangDifferentCountry:
 121         return 1;
 122     case FcLangDifferentLang:
 123     default:
 124         return 2;
 125     }
 126 }
 127
 128 static double
 129 FcCompareBool (FcValue *v1, FcValue *v2)
 130 {
 131     if (fc_storage_type(v2) != FcTypeBool || fc_storage_type(v1) != FcTypeBool)
 132         return -1.0;
 133     return (double) v2->u.b != v1->u.b;
 134 }
 135
 136 static double
 137 FcCompareCharSet (FcValue *v1, FcValue *v2)
 138 {
 139     return (double) FcCharSetSubtractCount (fc_value_charset(v1), fc_value_charset(v2));
 140 }
 141
 142 static double
 143 FcCompareSize (FcValue *value1, FcValue *value2)
 144 {
 145     double  v1, v2, v;
 146
 147     switch (value1->type) {
 148     case FcTypeInteger:
 149         v1 = value1->u.i;
 150         break;
 151     case FcTypeDouble:
 152         v1 = value1->u.d;
 153         break;
 154     default:
 155         return -1;
 156     }
 157     switch (value2->type) {
 158     case FcTypeInteger:
 159         v2 = value2->u.i;
 160         break;
 161     case FcTypeDouble:
 162         v2 = value2->u.d;
 163         break;
 164     default:
 165         return -1;
 166     }
 167     if (v2 == 0)
 168         return 0;
 169     v = v2 - v1;
 170     if (v < 0)
 171         v = -v;
 172     return v;
 173 }
 174
 175 typedef struct _FcMatcher {
 176     const char      *object;
 177     FcObjectPtr     objectPtr;
 178     double          (*compare) (FcValue *value1, FcValue *value2);
 179     int             strong, weak;
 180 } FcMatcher;
 181
 182 /*
 183  * Order is significant, it defines the precedence of
 184  * each value, earlier values are more significant than
 185  * later values
 186  */
 187 static FcMatcher _FcMatchers [] = {
 188     { FC_FOUNDRY,       0, FcCompareString,     0, 0 },
 189 #define MATCH_FOUNDRY       0
 190 #define MATCH_FOUNDRY_INDEX 0
 191
 192     { FC_CHARSET,       0, FcCompareCharSet,    1, 1 },
 193 #define MATCH_CHARSET       1
 194 #define MATCH_CHARSET_INDEX 1
 195
 196     { FC_FAMILY,        0, FcCompareFamily,     2, 4 },
 197 #define MATCH_FAMILY        2
 198 #define MATCH_FAMILY_STRONG_INDEX   2
 199 #define MATCH_FAMILY_WEAK_INDEX     4
 200
 201     { FC_LANG,          0, FcCompareLang,       3, 3 },
 202 #define MATCH_LANG          3
 203 #define MATCH_LANG_INDEX    3
 204
 205     { FC_SPACING,       0, FcCompareNumber,     5, 5 },
 206 #define MATCH_SPACING       4
 207 #define MATCH_SPACING_INDEX 5
 208
 209     { FC_PIXEL_SIZE,    0, FcCompareSize,       6, 6 },
 210 #define MATCH_PIXEL_SIZE    5
 211 #define MATCH_PIXEL_SIZE_INDEX  6
 212
 213     { FC_STYLE,         0, FcCompareString,     7, 7 },
 214 #define MATCH_STYLE         6
 215 #define MATCH_STYLE_INDEX   7
 216
 217     { FC_SLANT,         0, FcCompareNumber,     8, 8 },
 218 #define MATCH_SLANT         7
 219 #define MATCH_SLANT_INDEX   8
 220
 221     { FC_WEIGHT,        0, FcCompareNumber,     9, 9 },
 222 #define MATCH_WEIGHT        8
 223 #define MATCH_WEIGHT_INDEX  9
 224
 225     { FC_WIDTH,         0, FcCompareNumber,     10, 10 },
 226 #define MATCH_WIDTH         9
 227 #define MATCH_WIDTH_INDEX   10
 228
 229     { FC_ANTIALIAS,     0, FcCompareBool,       11, 11 },
 230 #define MATCH_ANTIALIAS     10
 231 #define MATCH_ANTIALIAS_INDEX       11
 232
 233     { FC_RASTERIZER,    0, FcCompareString,     12, 12 },
 234 #define MATCH_RASTERIZER    11
 235 #define MATCH_RASTERIZER_INDEX    12
 236
 237     { FC_OUTLINE,       0, FcCompareBool,       13, 13 },
 238 #define MATCH_OUTLINE       12
 239 #define MATCH_OUTLINE_INDEX         13
 240
 241     { FC_FONTVERSION,   0, FcCompareNumber,     14, 14 },
 242 #define MATCH_FONTVERSION   13
 243 #define MATCH_FONTVERSION_INDEX   14
 244 };
 245
 246 #define NUM_MATCH_VALUES    15
 247
 248 static FcBool matchObjectPtrsInit = FcFalse;
 249
 250 static void
 251 FcMatchObjectPtrsInit (void)
 252 {
 253     _FcMatchers[MATCH_FOUNDRY].objectPtr = FcObjectToPtr(FC_FOUNDRY);
 254     _FcMatchers[MATCH_CHARSET].objectPtr = FcObjectToPtr(FC_CHARSET);
 255     _FcMatchers[MATCH_FAMILY].objectPtr = FcObjectToPtr(FC_FAMILY);
 256     _FcMatchers[MATCH_LANG].objectPtr = FcObjectToPtr(FC_LANG);
 257     _FcMatchers[MATCH_SPACING].objectPtr = FcObjectToPtr(FC_SPACING);
 258     _FcMatchers[MATCH_PIXEL_SIZE].objectPtr = FcObjectToPtr(FC_PIXEL_SIZE);
 259     _FcMatchers[MATCH_STYLE].objectPtr = FcObjectToPtr(FC_STYLE);
 260     _FcMatchers[MATCH_SLANT].objectPtr = FcObjectToPtr(FC_SLANT);
 261     _FcMatchers[MATCH_WEIGHT].objectPtr = FcObjectToPtr(FC_WEIGHT);
 262     _FcMatchers[MATCH_WIDTH].objectPtr = FcObjectToPtr(FC_WIDTH);
 263     _FcMatchers[MATCH_ANTIALIAS].objectPtr = FcObjectToPtr(FC_ANTIALIAS);
 264     _FcMatchers[MATCH_RASTERIZER].objectPtr = FcObjectToPtr(FC_RASTERIZER);
 265     _FcMatchers[MATCH_OUTLINE].objectPtr = FcObjectToPtr(FC_OUTLINE);
 266     _FcMatchers[MATCH_FONTVERSION].objectPtr = FcObjectToPtr(FC_FONTVERSION);
 267     matchObjectPtrsInit = FcTrue;
 268 }
 269
 270 static FcMatcher*
 271 FcObjectPtrToMatcher (FcObjectPtr o)
 272 {
 273     int         i;
 274     const char  *object = FcObjectPtrU(o);
 275
 276     i = -1;
 277     switch (object[0]) {
 278     case 'f':
 279         switch (object[1]) {
 280         case 'o':
 281             switch (object[2]) {
 282             case 'u':
 283                 i = MATCH_FOUNDRY; break;
 284             case 'n':
 285                 i = MATCH_FONTVERSION; break;
 286             }
 287             break;
 288         case 'a':
 289             i = MATCH_FAMILY; break;
 290         }
 291         break;
 292     case 'c':
 293         i = MATCH_CHARSET; break;
 294     case 'a':
 295         i = MATCH_ANTIALIAS; break;
 296     case 'l':
 297         i = MATCH_LANG; break;
 298     case 's':
 299         switch (object[1]) {
 300         case 'p':
 301             i = MATCH_SPACING; break;
 302         case 't':
 303             i = MATCH_STYLE; break;
 304         case 'l':
 305             i = MATCH_SLANT; break;
 306         }
 307         break;
 308     case 'p':
 309         i = MATCH_PIXEL_SIZE; break;
 310     case 'w':
 311         switch (object[1]) {
 312         case 'i':
 313             i = MATCH_WIDTH; break;
 314         case 'e':
 315             i = MATCH_WEIGHT; break;
 316         }
 317         break;
 318     case 'r':
 319         i = MATCH_RASTERIZER; break;
 320     case 'o':
 321         i = MATCH_OUTLINE; break;
 322     }
 323
 324     if (i < 0)
 325         return 0;
 326
 327     if (!matchObjectPtrsInit)
 328         FcMatchObjectPtrsInit();
 329
 330     if (o != _FcMatchers[i].objectPtr)
 331         return 0;
 332
 333     return _FcMatchers+i;
 334 }
 335
 336 static FcBool
 337 FcCompareValueList (FcObjectPtr o,
 338                     FcValueListPtr v1orig,      /* pattern */
 339                     FcValueListPtr v2orig,      /* target */
 340                     FcValue     *bestValue,
 341                     double      *value,
 342                     FcResult    *result)
 343 {
 344     FcValueListPtr  v1, v2;
 345     FcValueList     *v1_ptrU, *v2_ptrU;
 346     double          v, best, bestStrong, bestWeak;
 347     int             j;
 348     const char      *object = FcObjectPtrU(o);
 349     FcMatcher       *match = FcObjectPtrToMatcher(o);
 350
 351     if (!match)
 352     {
 353         if (bestValue)
 354             *bestValue = FcValueCanonicalize(&FcValueListPtrU(v2orig)->value);
 355         return FcTrue;
 356     }
 357
 358     best = 1e99;
 359     bestStrong = 1e99;
 360     bestWeak = 1e99;
 361     j = 0;
 362     for (v1 = v1orig, v1_ptrU = FcValueListPtrU(v1); v1_ptrU;
 363          v1 = v1_ptrU->next, v1_ptrU = FcValueListPtrU(v1))
 364     {
 365         for (v2 = v2orig, v2_ptrU = FcValueListPtrU(v2); v2_ptrU;
 366              v2 = v2_ptrU->next, v2_ptrU = FcValueListPtrU(v2))
 367         {
 368             v = (match->compare) (&v1_ptrU->value, &v2_ptrU->value);
 369             if (v < 0)
 370             {
 371                 *result = FcResultTypeMismatch;
 372                 return FcFalse;
 373             }
 374             v = v * 100 + j;
 375             if (v < best)
 376             {
 377                 if (bestValue)
 378                     *bestValue = FcValueCanonicalize(&v2_ptrU->value);
 379                 best = v;
 380             }
 381             if (v1_ptrU->binding == FcValueBindingStrong)
 382             {
 383                 if (v < bestStrong)
 384                     bestStrong = v;
 385             }
 386             else
 387             {
 388                 if (v < bestWeak)
 389                     bestWeak = v;
 390             }
 391         }
 392         j++;
 393     }
 394     if (FcDebug () & FC_DBG_MATCHV)
 395     {
 396         printf (" %s: %g ", object, best);
 397         FcValueListPrint (v1orig);
 398         printf (", ");
 399         FcValueListPrint (v2orig);
 400         printf ("\n");
 401     }
 402     if (value)
 403     {
 404         int weak    = match->weak;
 405         int strong  = match->strong;
 406         if (weak == strong)
 407             value[strong] += best;
 408         else
 409         {
 410             value[weak] += bestWeak;
 411             value[strong] += bestStrong;
 412         }
 413     }
 414     return FcTrue;
 415 }
 416
 417 /*
 418  * Return a value indicating the distance between the two lists of
 419  * values
 420  */
 421
 422 static FcBool
 423 FcCompare (FcPattern    *pat,
 424            FcPattern    *fnt,
 425            double       *value,
 426            FcResult     *result)
 427 {
 428     int             i, i1, i2;
 429
 430     for (i = 0; i < NUM_MATCH_VALUES; i++)
 431         value[i] = 0.0;
 432
 433     i1 = 0;
 434     i2 = 0;
 435     while (i1 < pat->num && i2 < fnt->num)
 436     {
 437         FcPatternElt *elt_i1 = FcPatternEltU(pat->elts)+i1;
 438         FcPatternElt *elt_i2 = FcPatternEltU(fnt->elts)+i2;
 439
 440         i = FcObjectPtrCompare(elt_i1->object, elt_i2->object);
 441         if (i > 0)
 442             i2++;
 443         else if (i < 0)
 444             i1++;
 445         else
 446         {
 447             if (!FcCompareValueList (elt_i1->object,
 448                                      elt_i1->values, elt_i2->values,
 449                                      0, value, result))
 450                 return FcFalse;
 451             i1++;
 452             i2++;
 453         }
 454     }
 455     return FcTrue;
 456 }
 457
 458 FcPattern *
 459 FcFontRenderPrepare (FcConfig       *config,
 460                      FcPattern      *pat,
 461                      FcPattern      *font)
 462 {
 463     FcPattern       *new;
 464     int             i;
 465     FcPatternElt    *fe, *pe;
 466     FcValue         v;
 467     FcResult        result;
 468
 469     new = FcPatternCreate ();
 470     if (!new)
 471         return 0;
 472     for (i = 0; i < font->num; i++)
 473     {
 474         fe = FcPatternEltU(font->elts)+i;
 475         pe = FcPatternFindElt (pat, FcObjectPtrU(fe->object));
 476         if (pe)
 477         {
 478             if (!FcCompareValueList (pe->object, pe->values,
 479                                      fe->values, &v, 0, &result))
 480             {
 481                 FcPatternDestroy (new);
 482                 return 0;
 483             }
 484         }
 485         else
 486             v = FcValueCanonicalize(&FcValueListPtrU(fe->values)->value);
 487         FcPatternAdd (new, FcObjectPtrU(fe->object), v, FcFalse);
 488     }
 489     for (i = 0; i < pat->num; i++)
 490     {
 491         pe = FcPatternEltU(pat->elts)+i;
 492         fe = FcPatternFindElt (font, FcObjectPtrU(pe->object));
 493         if (!fe)
 494             FcPatternAdd (new, FcObjectPtrU(pe->object),
 495                           FcValueCanonicalize(&FcValueListPtrU(pe->values)->value), FcTrue);
 496     }
 497
 498     FcConfigSubstituteWithPat (config, new, pat, FcMatchFont);
 499     return new;
 500 }
 501
 502 FcPattern *
 503 FcFontSetMatch (FcConfig    *config,
 504                 FcFontSet   **sets,
 505                 int         nsets,
 506                 FcPattern   *p,
 507                 FcResult    *result)
 508 {
 509     double          score[NUM_MATCH_VALUES], bestscore[NUM_MATCH_VALUES];
 510     int             f;
 511     FcFontSet       *s;
 512     FcPattern       *best;
 513     int             i;
 514     int             set;
 515
 516     for (i = 0; i < NUM_MATCH_VALUES; i++)
 517         bestscore[i] = 0;
 518     best = 0;
 519     if (FcDebug () & FC_DBG_MATCH)
 520     {
 521         printf ("Match ");
 522         FcPatternPrint (p);
 523     }
 524     if (!config)
 525     {
 526         config = FcConfigGetCurrent ();
 527         if (!config)
 528             return 0;
 529     }
 530     for (set = 0; set < nsets; set++)
 531     {
 532         s = sets[set];
 533         if (!s)
 534             continue;
 535         for (f = 0; f < s->nfont; f++)
 536         {
 537             if (FcDebug () & FC_DBG_MATCHV)
 538             {
 539                 printf ("Font %d ", f);
 540                 FcPatternPrint (s->fonts[f]);
 541             }
 542             if (!FcCompare (p, s->fonts[f], score, result))
 543                 return 0;
 544             if (FcDebug () & FC_DBG_MATCHV)
 545             {
 546                 printf ("Score");
 547                 for (i = 0; i < NUM_MATCH_VALUES; i++)
 548                 {
 549                     printf (" %g", score[i]);
 550                 }
 551                 printf ("\n");
 552             }
 553             for (i = 0; i < NUM_MATCH_VALUES; i++)
 554             {
 555                 if (best && bestscore[i] < score[i])
 556                     break;
 557                 if (!best || score[i] < bestscore[i])
 558                 {
 559                     for (i = 0; i < NUM_MATCH_VALUES; i++)
 560                         bestscore[i] = score[i];
 561                     best = s->fonts[f];
 562                     break;
 563                 }
 564             }
 565         }
 566     }
 567     if (FcDebug () & FC_DBG_MATCH)
 568     {
 569         printf ("Best score");
 570         for (i = 0; i < NUM_MATCH_VALUES; i++)
 571             printf (" %g", bestscore[i]);
 572         FcPatternPrint (best);
 573     }
 574     if (!best)
 575     {
 576         *result = FcResultNoMatch;
 577         return 0;
 578     }
 579     return FcFontRenderPrepare (config, p, best);
 580 }
 581
 582 FcPattern *
 583 FcFontMatch (FcConfig   *config,
 584              FcPattern  *p,
 585              FcResult   *result)
 586 {
 587     FcFontSet   *sets[2];
 588     int         nsets;
 589
 590     if (!config)
 591     {
 592         config = FcConfigGetCurrent ();
 593         if (!config)
 594             return 0;
 595     }
 596     nsets = 0;
 597     if (config->fonts[FcSetSystem])
 598         sets[nsets++] = config->fonts[FcSetSystem];
 599     if (config->fonts[FcSetApplication])
 600         sets[nsets++] = config->fonts[FcSetApplication];
 601     return FcFontSetMatch (config, sets, nsets, p, result);
 602 }
 603
 604 typedef struct _FcSortNode {
 605     FcPattern   *pattern;
 606     double      score[NUM_MATCH_VALUES];
 607 } FcSortNode;
 608
 609 static int
 610 FcSortCompare (const void *aa, const void *ab)
 611 {
 612     FcSortNode  *a = *(FcSortNode **) aa;
 613     FcSortNode  *b = *(FcSortNode **) ab;
 614     double      *as = &a->score[0];
 615     double      *bs = &b->score[0];
 616     double      ad = 0, bd = 0;
 617     int         i;
 618
 619     i = NUM_MATCH_VALUES;
 620     while (i-- && (ad = *as++) == (bd = *bs++))
 621         ;
 622     return ad < bd ? -1 : ad > bd ? 1 : 0;
 623 }
 624
 625 static FcBool
 626 FcSortWalk (FcSortNode **n, int nnode, FcFontSet *fs, FcCharSet **cs, FcBool trim, FcBool build_cs)
 627 {
 628     FcCharSet   *ncs;
 629     FcSortNode  *node;
 630
 631     while (nnode--)
 632     {
 633         node = *n++;
 634         if (FcPatternGetCharSet (node->pattern, FC_CHARSET, 0, &ncs) ==
 635             FcResultMatch)
 636         {
 637             /*
 638              * If this font isn't a subset of the previous fonts,
 639              * add it to the list
 640              */
 641             if (!trim || !*cs || !FcCharSetIsSubset (ncs, *cs))
 642             {
 643                 if (trim || build_cs)
 644                 {
 645                     if (*cs)
 646                     {
 647                         ncs = FcCharSetUnion (ncs, *cs);
 648                         if (!ncs)
 649                             return FcFalse;
 650                         FcCharSetDestroy (*cs);
 651                     }
 652                     else
 653                         ncs = FcCharSetCopy (ncs);
 654                     *cs = ncs;
 655                 }
 656
 657                 FcPatternReference (node->pattern);
 658                 if (FcDebug () & FC_DBG_MATCH)
 659                 {
 660                     printf ("Add ");
 661                     FcPatternPrint (node->pattern);
 662                 }
 663                 if (!FcFontSetAdd (fs, node->pattern))
 664                 {
 665                     FcPatternDestroy (node->pattern);
 666                     return FcFalse;
 667                 }
 668             }
 669         }
 670     }
 671     return FcTrue;
 672 }
 673
 674 void
 675 FcFontSetSortDestroy (FcFontSet *fs)
 676 {
 677     FcFontSetDestroy (fs);
 678 }
 679
 680 FcFontSet *
 681 FcFontSetSort (FcConfig     *config,
 682                FcFontSet    **sets,
 683                int          nsets,
 684                FcPattern    *p,
 685                FcBool       trim,
 686                FcCharSet    **csp,
 687                FcResult     *result)
 688 {
 689     FcFontSet       *ret;
 690     FcFontSet       *s;
 691     FcSortNode      *nodes;
 692     FcSortNode      **nodeps, **nodep;
 693     int             nnodes;
 694     FcSortNode      *new;
 695     FcCharSet       *cs;
 696     int             set;
 697     int             f;
 698     int             i;
 699     int             nPatternLang;
 700     FcBool          *patternLangSat;
 701     FcValue         patternLang;
 702
 703     if (FcDebug () & FC_DBG_MATCH)
 704     {
 705         printf ("Sort ");
 706         FcPatternPrint (p);
 707     }
 708     nnodes = 0;
 709     for (set = 0; set < nsets; set++)
 710     {
 711         s = sets[set];
 712         if (!s)
 713             continue;
 714         nnodes += s->nfont;
 715     }
 716     if (!nnodes)
 717         goto bail0;
 718
 719     for (nPatternLang = 0;
 720          FcPatternGet (p, FC_LANG, nPatternLang, &patternLang) == FcResultMatch;
 721          nPatternLang++)
 722         ;
 723
 724     /* freed below */
 725     nodes = malloc (nnodes * sizeof (FcSortNode) +
 726                     nnodes * sizeof (FcSortNode *) +
 727                     nPatternLang * sizeof (FcBool));
 728     if (!nodes)
 729         goto bail0;
 730     nodeps = (FcSortNode **) (nodes + nnodes);
 731     patternLangSat = (FcBool *) (nodeps + nnodes);
 732
 733     new = nodes;
 734     nodep = nodeps;
 735     for (set = 0; set < nsets; set++)
 736     {
 737         s = sets[set];
 738         if (!s)
 739             continue;
 740         for (f = 0; f < s->nfont; f++)
 741         {
 742             if (FcDebug () & FC_DBG_MATCHV)
 743             {
 744                 printf ("Font %d ", f);
 745                 FcPatternPrint (s->fonts[f]);
 746             }
 747             new->pattern = s->fonts[f];
 748             if (!FcCompare (p, new->pattern, new->score, result))
 749                 goto bail1;
 750             if (FcDebug () & FC_DBG_MATCHV)
 751             {
 752                 printf ("Score");
 753                 for (i = 0; i < NUM_MATCH_VALUES; i++)
 754                 {
 755                     printf (" %g", new->score[i]);
 756                 }
 757                 printf ("\n");
 758             }
 759             *nodep = new;
 760             new++;
 761             nodep++;
 762         }
 763     }
 764
 765     nnodes = new - nodes;
 766
 767     qsort (nodeps, nnodes, sizeof (FcSortNode *),
 768            FcSortCompare);
 769
 770     for (i = 0; i < nPatternLang; i++)
 771         patternLangSat[i] = FcFalse;
 772
 773     for (f = 0; f < nnodes; f++)
 774     {
 775         FcBool  satisfies = FcFalse;
 776         /*
 777          * If this node matches any language, go check
 778          * which ones and satisfy those entries
 779          */
 780         if (nodeps[f]->score[MATCH_LANG_INDEX] < nPatternLang)
 781         {
 782             for (i = 0; i < nPatternLang; i++)
 783             {
 784                 FcValue     nodeLang;
 785
 786                 if (!patternLangSat[i] &&
 787                     FcPatternGet (p, FC_LANG, i, &patternLang) == FcResultMatch &&
 788                     FcPatternGet (nodeps[f]->pattern, FC_LANG, 0, &nodeLang) == FcResultMatch)
 789                 {
 790                     double  compare = FcCompareLang (&patternLang, &nodeLang);
 791                     if (compare >= 0 && compare < 2)
 792                     {
 793                         if (FcDebug () & FC_DBG_MATCHV)
 794                         {
 795                             FcChar8 *family;
 796                             FcChar8 *style;
 797
 798                             if (FcPatternGetString (nodeps[f]->pattern, FC_FAMILY, 0, &family) == FcResultMatch &&
 799                                 FcPatternGetString (nodeps[f]->pattern, FC_STYLE, 0, &style) == FcResultMatch)
 800                                 printf ("Font %s:%s matches language %d\n", family, style, i);
 801                         }
 802                         patternLangSat[i] = FcTrue;
 803                         satisfies = FcTrue;
 804                         break;
 805                     }
 806                 }
 807             }
 808         }
 809         if (!satisfies)
 810             nodeps[f]->score[MATCH_LANG_INDEX] = 1000.0;
 811     }
 812
 813     /*
 814      * Re-sort once the language issues have been settled
 815      */
 816     qsort (nodeps, nnodes, sizeof (FcSortNode *),
 817            FcSortCompare);
 818
 819     ret = FcFontSetCreate ();
 820     if (!ret)
 821         goto bail1;
 822
 823     cs = 0;
 824
 825     if (!FcSortWalk (nodeps, nnodes, ret, &cs, trim, (csp!=0)))
 826         goto bail2;
 827
 828     if (csp)
 829         *csp = cs;
 830     else
 831     {
 832         if (cs)
 833             FcCharSetDestroy (cs);
 834     }
 835
 836     free (nodes);
 837
 838     return ret;
 839
 840 bail2:
 841     if (cs)
 842         FcCharSetDestroy (cs);
 843     FcFontSetDestroy (ret);
 844 bail1:
 845     free (nodes);
 846 bail0:
 847     return 0;
 848 }
 849
 850 FcFontSet *
 851 FcFontSort (FcConfig    *config,
 852             FcPattern   *p,
 853             FcBool      trim,
 854             FcCharSet   **csp,
 855             FcResult    *result)
 856 {
 857     FcFontSet   *sets[2];
 858     int         nsets;
 859
 860     if (!config)
 861     {
 862         config = FcConfigGetCurrent ();
 863         if (!config)
 864             return 0;
 865     }
 866     nsets = 0;
 867     if (config->fonts[FcSetSystem])
 868         sets[nsets++] = config->fonts[FcSetSystem];
 869     if (config->fonts[FcSetApplication])
 870         sets[nsets++] = config->fonts[FcSetApplication];
 871     return FcFontSetSort (config, sets, nsets, p, trim, csp, result);
 872 }