]>
git.wh0rd.org - fontconfig.git/blob - src/fcmatch.c
0d84704b51abfff52eba73837ebf11aebbe8b3cd
2 * fontconfig/src/fcmatch.c
4 * Copyright © 2000 Keith Packard
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.
16 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL THE AUTHOR(S) 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.
31 FcCompareNumber (FcValue
*value1
, FcValue
*value2
)
35 switch (value1
->type
) {
37 v1
= (double) value1
->u
.i
;
45 switch (value2
->type
) {
47 v2
= (double) value2
->u
.i
;
62 FcCompareString (FcValue
*v1
, FcValue
*v2
)
64 return (double) FcStrCmpIgnoreCase (fc_value_string(v1
), fc_value_string(v2
)) != 0;
68 FcCompareFamily (FcValue
*v1
, FcValue
*v2
)
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
);
75 if (FcToLower(*v1_string
) != FcToLower(*v2_string
) &&
76 *v1_string
!= ' ' && *v2_string
!= ' ')
79 return (double) FcStrCmpIgnoreBlanksAndCase (v1_string
, v2_string
) != 0;
83 FcCompareLang (FcValue
*v1
, FcValue
*v2
)
86 FcValue value1
= FcValueCanonicalize(v1
), value2
= FcValueCanonicalize(v2
);
88 switch (value1
.type
) {
90 switch (value2
.type
) {
92 result
= FcLangSetCompare (value1
.u
.l
, value2
.u
.l
);
95 result
= FcLangSetHasLang (value1
.u
.l
,
103 switch (value2
.type
) {
105 result
= FcLangSetHasLang (value2
.u
.l
, value1
.u
.s
);
108 result
= FcLangCompare (value1
.u
.s
,
121 case FcLangDifferentCountry
:
123 case FcLangDifferentLang
:
130 FcCompareBool (FcValue
*v1
, FcValue
*v2
)
132 if (fc_storage_type(v2
) != FcTypeBool
|| fc_storage_type(v1
) != FcTypeBool
)
134 return (double) v2
->u
.b
!= v1
->u
.b
;
138 FcCompareCharSet (FcValue
*v1
, FcValue
*v2
)
140 return (double) FcCharSetSubtractCount (fc_value_charset(v1
), fc_value_charset(v2
));
144 FcCompareSize (FcValue
*value1
, FcValue
*value2
)
148 switch (value1
->type
) {
158 switch (value2
->type
) {
176 typedef struct _FcMatcher
{
178 double (*compare
) (FcValue
*value1
, FcValue
*value2
);
183 * Order is significant, it defines the precedence of
184 * each value, earlier values are more significant than
187 static const FcMatcher _FcMatchers
[] = {
188 { FC_FOUNDRY_OBJECT
, FcCompareString
, 0, 0 },
189 #define MATCH_FOUNDRY 0
190 { FC_CHARSET_OBJECT
, FcCompareCharSet
, 1, 1 },
191 #define MATCH_CHARSET 1
192 { FC_FAMILY_OBJECT
, FcCompareFamily
, 2, 4 },
193 #define MATCH_FAMILY 2
194 { FC_LANG_OBJECT
, FcCompareLang
, 3, 3 },
196 #define MATCH_LANG_INDEX 3
197 { FC_SPACING_OBJECT
, FcCompareNumber
, 5, 5 },
198 #define MATCH_SPACING 4
199 { FC_PIXEL_SIZE_OBJECT
, FcCompareSize
, 6, 6 },
200 #define MATCH_PIXEL_SIZE 5
201 { FC_STYLE_OBJECT
, FcCompareString
, 7, 7 },
202 #define MATCH_STYLE 6
203 { FC_SLANT_OBJECT
, FcCompareNumber
, 8, 8 },
204 #define MATCH_SLANT 7
205 { FC_WEIGHT_OBJECT
, FcCompareNumber
, 9, 9 },
206 #define MATCH_WEIGHT 8
207 { FC_WIDTH_OBJECT
, FcCompareNumber
, 10, 10 },
208 #define MATCH_WIDTH 9
209 { FC_DECORATIVE_OBJECT
, FcCompareBool
, 11, 11 },
210 #define MATCH_DECORATIVE 10
211 { FC_ANTIALIAS_OBJECT
, FcCompareBool
, 12, 12 },
212 #define MATCH_ANTIALIAS 11
213 { FC_RASTERIZER_OBJECT
, FcCompareString
, 13, 13 },
214 #define MATCH_RASTERIZER 12
215 { FC_OUTLINE_OBJECT
, FcCompareBool
, 14, 14 },
216 #define MATCH_OUTLINE 13
217 { FC_FONTVERSION_OBJECT
, FcCompareNumber
, 15, 15 },
218 #define MATCH_FONTVERSION 14
221 #define NUM_MATCH_VALUES 16
223 static const FcMatcher
*
224 FcObjectToMatcher (FcObject object
)
230 case FC_FOUNDRY_OBJECT
:
231 i
= MATCH_FOUNDRY
; break;
232 case FC_FONTVERSION_OBJECT
:
233 i
= MATCH_FONTVERSION
; break;
234 case FC_FAMILY_OBJECT
:
235 i
= MATCH_FAMILY
; break;
236 case FC_CHARSET_OBJECT
:
237 i
= MATCH_CHARSET
; break;
238 case FC_ANTIALIAS_OBJECT
:
239 i
= MATCH_ANTIALIAS
; break;
241 i
= MATCH_LANG
; break;
242 case FC_SPACING_OBJECT
:
243 i
= MATCH_SPACING
; break;
244 case FC_STYLE_OBJECT
:
245 i
= MATCH_STYLE
; break;
246 case FC_SLANT_OBJECT
:
247 i
= MATCH_SLANT
; break;
248 case FC_PIXEL_SIZE_OBJECT
:
249 i
= MATCH_PIXEL_SIZE
; break;
250 case FC_WIDTH_OBJECT
:
251 i
= MATCH_WIDTH
; break;
252 case FC_WEIGHT_OBJECT
:
253 i
= MATCH_WEIGHT
; break;
254 case FC_RASTERIZER_OBJECT
:
255 i
= MATCH_RASTERIZER
; break;
256 case FC_OUTLINE_OBJECT
:
257 i
= MATCH_OUTLINE
; break;
258 case FC_DECORATIVE_OBJECT
:
259 i
= MATCH_DECORATIVE
; break;
265 return _FcMatchers
+i
;
269 FcCompareValueList (FcObject object
,
270 FcValueListPtr v1orig
, /* pattern */
271 FcValueListPtr v2orig
, /* target */
276 FcValueListPtr v1
, v2
;
277 double v
, best
, bestStrong
, bestWeak
;
279 const FcMatcher
*match
= FcObjectToMatcher(object
);
284 *bestValue
= FcValueCanonicalize(&v2orig
->value
);
292 for (v1
= v1orig
; v1
; v1
= FcValueListNext(v1
))
294 for (v2
= v2orig
; v2
; v2
= FcValueListNext(v2
))
296 v
= (match
->compare
) (&v1
->value
, &v2
->value
);
299 *result
= FcResultTypeMismatch
;
306 *bestValue
= FcValueCanonicalize(&v2
->value
);
309 if (v1
->binding
== FcValueBindingStrong
)
322 if (FcDebug () & FC_DBG_MATCHV
)
324 printf (" %s: %g ", FcObjectName (object
), best
);
325 FcValueListPrint (v1orig
);
327 FcValueListPrint (v2orig
);
332 int weak
= match
->weak
;
333 int strong
= match
->strong
;
335 value
[strong
] += best
;
338 value
[weak
] += bestWeak
;
339 value
[strong
] += bestStrong
;
346 * Return a value indicating the distance between the two lists of
351 FcCompare (FcPattern
*pat
,
358 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
363 while (i1
< pat
->num
&& i2
< fnt
->num
)
365 FcPatternElt
*elt_i1
= &FcPatternElts(pat
)[i1
];
366 FcPatternElt
*elt_i2
= &FcPatternElts(fnt
)[i2
];
368 i
= FcObjectCompare(elt_i1
->object
, elt_i2
->object
);
375 if (!FcCompareValueList (elt_i1
->object
,
376 FcPatternEltValues(elt_i1
),
377 FcPatternEltValues(elt_i2
),
388 FcFontRenderPrepare (FcConfig
*config
,
394 FcPatternElt
*fe
, *pe
;
398 new = FcPatternCreate ();
401 for (i
= 0; i
< font
->num
; i
++)
403 fe
= &FcPatternElts(font
)[i
];
404 pe
= FcPatternObjectFindElt (pat
, fe
->object
);
407 if (!FcCompareValueList (pe
->object
, FcPatternEltValues(pe
),
408 FcPatternEltValues(fe
), &v
, 0, &result
))
410 FcPatternDestroy (new);
415 v
= FcValueCanonicalize(&FcPatternEltValues (fe
)->value
);
416 FcPatternObjectAdd (new, fe
->object
, v
, FcFalse
);
418 for (i
= 0; i
< pat
->num
; i
++)
420 pe
= &FcPatternElts(pat
)[i
];
421 fe
= FcPatternObjectFindElt (font
, pe
->object
);
424 v
= FcValueCanonicalize(&FcPatternEltValues(pe
)->value
);
425 FcPatternObjectAdd (new, pe
->object
, v
, FcTrue
);
429 FcConfigSubstituteWithPat (config
, new, pat
, FcMatchFont
);
434 FcFontSetMatchInternal (FcConfig
*config
,
440 double score
[NUM_MATCH_VALUES
], bestscore
[NUM_MATCH_VALUES
];
447 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
450 if (FcDebug () & FC_DBG_MATCH
)
455 for (set
= 0; set
< nsets
; set
++)
460 for (f
= 0; f
< s
->nfont
; f
++)
462 if (FcDebug () & FC_DBG_MATCHV
)
464 printf ("Font %d ", f
);
465 FcPatternPrint (s
->fonts
[f
]);
467 if (!FcCompare (p
, s
->fonts
[f
], score
, result
))
469 if (FcDebug () & FC_DBG_MATCHV
)
472 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
474 printf (" %g", score
[i
]);
478 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
480 if (best
&& bestscore
[i
] < score
[i
])
482 if (!best
|| score
[i
] < bestscore
[i
])
484 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
485 bestscore
[i
] = score
[i
];
492 if (FcDebug () & FC_DBG_MATCH
)
494 printf ("Best score");
495 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
496 printf (" %g", bestscore
[i
]);
498 FcPatternPrint (best
);
502 *result
= FcResultNoMatch
;
509 FcFontSetMatch (FcConfig
*config
,
519 config
= FcConfigGetCurrent ();
523 best
= FcFontSetMatchInternal (config
, sets
, nsets
, p
, result
);
525 return FcFontRenderPrepare (config
, p
, best
);
531 FcFontMatch (FcConfig
*config
,
541 config
= FcConfigGetCurrent ();
546 if (config
->fonts
[FcSetSystem
])
547 sets
[nsets
++] = config
->fonts
[FcSetSystem
];
548 if (config
->fonts
[FcSetApplication
])
549 sets
[nsets
++] = config
->fonts
[FcSetApplication
];
551 best
= FcFontSetMatchInternal (config
, sets
, nsets
, p
, result
);
553 return FcFontRenderPrepare (config
, p
, best
);
558 typedef struct _FcSortNode
{
560 double score
[NUM_MATCH_VALUES
];
564 FcSortCompare (const void *aa
, const void *ab
)
566 FcSortNode
*a
= *(FcSortNode
**) aa
;
567 FcSortNode
*b
= *(FcSortNode
**) ab
;
568 double *as
= &a
->score
[0];
569 double *bs
= &b
->score
[0];
570 double ad
= 0, bd
= 0;
573 i
= NUM_MATCH_VALUES
;
574 while (i
-- && (ad
= *as
++) == (bd
= *bs
++))
576 return ad
< bd
? -1 : ad
> bd
? 1 : 0;
580 FcSortWalk (FcSortNode
**n
, int nnode
, FcFontSet
*fs
, FcCharSet
**csp
, FcBool trim
)
582 FcBool ret
= FcFalse
;
588 cs
= FcCharSetCreate ();
595 FcSortNode
*node
= *n
++;
596 FcBool adds_chars
= FcFalse
;
599 * Only fetch node charset if we'd need it
605 if (FcPatternGetCharSet (node
->pattern
, FC_CHARSET
, 0, &ncs
) !=
609 if (!FcCharSetMerge (cs
, ncs
, &adds_chars
))
614 * If this font isn't a subset of the previous fonts,
617 if (!trim
|| adds_chars
)
619 FcPatternReference (node
->pattern
);
620 if (FcDebug () & FC_DBG_MATCHV
)
623 FcPatternPrint (node
->pattern
);
625 if (!FcFontSetAdd (fs
, node
->pattern
))
627 FcPatternDestroy (node
->pattern
);
642 FcCharSetDestroy (cs
);
648 FcFontSetSortDestroy (FcFontSet
*fs
)
650 FcFontSetDestroy (fs
);
654 FcFontSetSort (FcConfig
*config
,
665 FcSortNode
**nodeps
, **nodep
;
672 FcBool
*patternLangSat
;
675 if (FcDebug () & FC_DBG_MATCH
)
681 for (set
= 0; set
< nsets
; set
++)
691 for (nPatternLang
= 0;
692 FcPatternGet (p
, FC_LANG
, nPatternLang
, &patternLang
) == FcResultMatch
;
697 nodes
= malloc (nnodes
* sizeof (FcSortNode
) +
698 nnodes
* sizeof (FcSortNode
*) +
699 nPatternLang
* sizeof (FcBool
));
702 nodeps
= (FcSortNode
**) (nodes
+ nnodes
);
703 patternLangSat
= (FcBool
*) (nodeps
+ nnodes
);
707 for (set
= 0; set
< nsets
; set
++)
712 for (f
= 0; f
< s
->nfont
; f
++)
714 if (FcDebug () & FC_DBG_MATCHV
)
716 printf ("Font %d ", f
);
717 FcPatternPrint (s
->fonts
[f
]);
719 new->pattern
= s
->fonts
[f
];
720 if (!FcCompare (p
, new->pattern
, new->score
, result
))
722 if (FcDebug () & FC_DBG_MATCHV
)
725 for (i
= 0; i
< NUM_MATCH_VALUES
; i
++)
727 printf (" %g", new->score
[i
]);
737 nnodes
= new - nodes
;
739 qsort (nodeps
, nnodes
, sizeof (FcSortNode
*),
742 for (i
= 0; i
< nPatternLang
; i
++)
743 patternLangSat
[i
] = FcFalse
;
745 for (f
= 0; f
< nnodes
; f
++)
747 FcBool satisfies
= FcFalse
;
749 * If this node matches any language, go check
750 * which ones and satisfy those entries
752 if (nodeps
[f
]->score
[MATCH_LANG_INDEX
] < 200)
754 for (i
= 0; i
< nPatternLang
; i
++)
758 if (!patternLangSat
[i
] &&
759 FcPatternGet (p
, FC_LANG
, i
, &patternLang
) == FcResultMatch
&&
760 FcPatternGet (nodeps
[f
]->pattern
, FC_LANG
, 0, &nodeLang
) == FcResultMatch
)
762 double compare
= FcCompareLang (&patternLang
, &nodeLang
);
763 if (compare
>= 0 && compare
< 2)
765 if (FcDebug () & FC_DBG_MATCHV
)
770 if (FcPatternGetString (nodeps
[f
]->pattern
, FC_FAMILY
, 0, &family
) == FcResultMatch
&&
771 FcPatternGetString (nodeps
[f
]->pattern
, FC_STYLE
, 0, &style
) == FcResultMatch
)
772 printf ("Font %s:%s matches language %d\n", family
, style
, i
);
774 patternLangSat
[i
] = FcTrue
;
782 nodeps
[f
]->score
[MATCH_LANG_INDEX
] = 10000.0;
786 * Re-sort once the language issues have been settled
788 qsort (nodeps
, nnodes
, sizeof (FcSortNode
*),
791 ret
= FcFontSetCreate ();
795 if (!FcSortWalk (nodeps
, nnodes
, ret
, csp
, trim
))
800 if (FcDebug() & FC_DBG_MATCH
)
802 printf ("First font ");
803 FcPatternPrint (ret
->fonts
[0]);
808 FcFontSetDestroy (ret
);
816 FcFontSort (FcConfig
*config
,
827 config
= FcConfigGetCurrent ();
832 if (config
->fonts
[FcSetSystem
])
833 sets
[nsets
++] = config
->fonts
[FcSetSystem
];
834 if (config
->fonts
[FcSetApplication
])
835 sets
[nsets
++] = config
->fonts
[FcSetApplication
];
836 return FcFontSetSort (config
, sets
, nsets
, p
, trim
, csp
, result
);
839 #include "fcaliastail.h"