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Diffstat (limited to 'fontconfig/src/fcmatch.c')
-rw-r--r--fontconfig/src/fcmatch.c1680
1 files changed, 840 insertions, 840 deletions
diff --git a/fontconfig/src/fcmatch.c b/fontconfig/src/fcmatch.c
index aa84eda83..6103ae2c9 100644
--- a/fontconfig/src/fcmatch.c
+++ b/fontconfig/src/fcmatch.c
@@ -1,840 +1,840 @@
-/*
- * fontconfig/src/fcmatch.c
- *
- * Copyright © 2000 Keith Packard
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
- * representations about the suitability of this software for any purpose. It
- * is provided "as is" without express or implied warranty.
- *
- * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include "fcint.h"
-#include <string.h>
-#include <ctype.h>
-#include <stdio.h>
-
-static double
-FcCompareNumber (FcValue *value1, FcValue *value2)
-{
- double v1, v2, v;
-
- switch (value1->type) {
- case FcTypeInteger:
- v1 = (double) value1->u.i;
- break;
- case FcTypeDouble:
- v1 = value1->u.d;
- break;
- default:
- return -1.0;
- }
- switch (value2->type) {
- case FcTypeInteger:
- v2 = (double) value2->u.i;
- break;
- case FcTypeDouble:
- v2 = value2->u.d;
- break;
- default:
- return -1.0;
- }
- v = v2 - v1;
- if (v < 0)
- v = -v;
- return v;
-}
-
-static double
-FcCompareString (FcValue *v1, FcValue *v2)
-{
- return (double) FcStrCmpIgnoreCase (FcValueString(v1), FcValueString(v2)) != 0;
-}
-
-static double
-FcCompareFamily (FcValue *v1, FcValue *v2)
-{
- /* rely on the guarantee in FcPatternAddWithBinding that
- * families are always FcTypeString. */
- const FcChar8* v1_string = FcValueString(v1);
- const FcChar8* v2_string = FcValueString(v2);
-
- if (FcToLower(*v1_string) != FcToLower(*v2_string) &&
- *v1_string != ' ' && *v2_string != ' ')
- return 1.0;
-
- return (double) FcStrCmpIgnoreBlanksAndCase (v1_string, v2_string) != 0;
-}
-
-static double
-FcCompareLang (FcValue *v1, FcValue *v2)
-{
- FcLangResult result;
- FcValue value1 = FcValueCanonicalize(v1), value2 = FcValueCanonicalize(v2);
-
- switch (value1.type) {
- case FcTypeLangSet:
- switch (value2.type) {
- case FcTypeLangSet:
- result = FcLangSetCompare (value1.u.l, value2.u.l);
- break;
- case FcTypeString:
- result = FcLangSetHasLang (value1.u.l,
- value2.u.s);
- break;
- default:
- return -1.0;
- }
- break;
- case FcTypeString:
- switch (value2.type) {
- case FcTypeLangSet:
- result = FcLangSetHasLang (value2.u.l, value1.u.s);
- break;
- case FcTypeString:
- result = FcLangCompare (value1.u.s,
- value2.u.s);
- break;
- default:
- return -1.0;
- }
- break;
- default:
- return -1.0;
- }
- switch (result) {
- case FcLangEqual:
- return 0;
- case FcLangDifferentCountry:
- return 1;
- case FcLangDifferentLang:
- default:
- return 2;
- }
-}
-
-static double
-FcCompareBool (FcValue *v1, FcValue *v2)
-{
- if (v2->type != FcTypeBool || v1->type != FcTypeBool)
- return -1.0;
- return (double) v2->u.b != v1->u.b;
-}
-
-static double
-FcCompareCharSet (FcValue *v1, FcValue *v2)
-{
- return (double) FcCharSetSubtractCount (FcValueCharSet(v1), FcValueCharSet(v2));
-}
-
-static double
-FcCompareSize (FcValue *value1, FcValue *value2)
-{
- double v1, v2, v;
-
- switch (value1->type) {
- case FcTypeInteger:
- v1 = value1->u.i;
- break;
- case FcTypeDouble:
- v1 = value1->u.d;
- break;
- default:
- return -1;
- }
- switch (value2->type) {
- case FcTypeInteger:
- v2 = value2->u.i;
- break;
- case FcTypeDouble:
- v2 = value2->u.d;
- break;
- default:
- return -1;
- }
- if (v2 == 0)
- return 0;
- v = v2 - v1;
- if (v < 0)
- v = -v;
- return v;
-}
-
-typedef struct _FcMatcher {
- FcObject object;
- double (*compare) (FcValue *value1, FcValue *value2);
- int strong, weak;
-} FcMatcher;
-
-/*
- * Order is significant, it defines the precedence of
- * each value, earlier values are more significant than
- * later values
- */
-static const FcMatcher _FcMatchers [] = {
- { FC_FOUNDRY_OBJECT, FcCompareString, 0, 0 },
-#define MATCH_FOUNDRY 0
- { FC_CHARSET_OBJECT, FcCompareCharSet, 1, 1 },
-#define MATCH_CHARSET 1
- { FC_FAMILY_OBJECT, FcCompareFamily, 2, 4 },
-#define MATCH_FAMILY 2
- { FC_LANG_OBJECT, FcCompareLang, 3, 3 },
-#define MATCH_LANG 3
-#define MATCH_LANG_INDEX 3
- { FC_SPACING_OBJECT, FcCompareNumber, 5, 5 },
-#define MATCH_SPACING 4
- { FC_PIXEL_SIZE_OBJECT, FcCompareSize, 6, 6 },
-#define MATCH_PIXEL_SIZE 5
- { FC_STYLE_OBJECT, FcCompareString, 7, 7 },
-#define MATCH_STYLE 6
- { FC_SLANT_OBJECT, FcCompareNumber, 8, 8 },
-#define MATCH_SLANT 7
- { FC_WEIGHT_OBJECT, FcCompareNumber, 9, 9 },
-#define MATCH_WEIGHT 8
- { FC_WIDTH_OBJECT, FcCompareNumber, 10, 10 },
-#define MATCH_WIDTH 9
- { FC_DECORATIVE_OBJECT, FcCompareBool, 11, 11 },
-#define MATCH_DECORATIVE 10
- { FC_ANTIALIAS_OBJECT, FcCompareBool, 12, 12 },
-#define MATCH_ANTIALIAS 11
- { FC_RASTERIZER_OBJECT, FcCompareString, 13, 13 },
-#define MATCH_RASTERIZER 12
- { FC_OUTLINE_OBJECT, FcCompareBool, 14, 14 },
-#define MATCH_OUTLINE 13
- { FC_FONTVERSION_OBJECT, FcCompareNumber, 15, 15 },
-#define MATCH_FONTVERSION 14
-};
-
-#define NUM_MATCH_VALUES 16
-
-static const FcMatcher*
-FcObjectToMatcher (FcObject object)
-{
- int i;
-
- i = -1;
- switch (object) {
- case FC_FOUNDRY_OBJECT:
- i = MATCH_FOUNDRY; break;
- case FC_FONTVERSION_OBJECT:
- i = MATCH_FONTVERSION; break;
- case FC_FAMILY_OBJECT:
- i = MATCH_FAMILY; break;
- case FC_CHARSET_OBJECT:
- i = MATCH_CHARSET; break;
- case FC_ANTIALIAS_OBJECT:
- i = MATCH_ANTIALIAS; break;
- case FC_LANG_OBJECT:
- i = MATCH_LANG; break;
- case FC_SPACING_OBJECT:
- i = MATCH_SPACING; break;
- case FC_STYLE_OBJECT:
- i = MATCH_STYLE; break;
- case FC_SLANT_OBJECT:
- i = MATCH_SLANT; break;
- case FC_PIXEL_SIZE_OBJECT:
- i = MATCH_PIXEL_SIZE; break;
- case FC_WIDTH_OBJECT:
- i = MATCH_WIDTH; break;
- case FC_WEIGHT_OBJECT:
- i = MATCH_WEIGHT; break;
- case FC_RASTERIZER_OBJECT:
- i = MATCH_RASTERIZER; break;
- case FC_OUTLINE_OBJECT:
- i = MATCH_OUTLINE; break;
- case FC_DECORATIVE_OBJECT:
- i = MATCH_DECORATIVE; break;
- }
-
- if (i < 0)
- return NULL;
-
- return _FcMatchers+i;
-}
-
-static FcBool
-FcCompareValueList (FcObject object,
- FcValueListPtr v1orig, /* pattern */
- FcValueListPtr v2orig, /* target */
- FcValue *bestValue,
- double *value,
- FcResult *result)
-{
- FcValueListPtr v1, v2;
- double v, best, bestStrong, bestWeak;
- int j;
- const FcMatcher *match = FcObjectToMatcher(object);
-
- if (!match)
- {
- if (bestValue)
- *bestValue = FcValueCanonicalize(&v2orig->value);
- return FcTrue;
- }
-
- best = 1e99;
- bestStrong = 1e99;
- bestWeak = 1e99;
- j = 1;
- for (v1 = v1orig; v1; v1 = FcValueListNext(v1))
- {
- for (v2 = v2orig; v2; v2 = FcValueListNext(v2))
- {
- v = (match->compare) (&v1->value, &v2->value);
- if (v < 0)
- {
- *result = FcResultTypeMismatch;
- return FcFalse;
- }
- v = v * 1000 + j;
- if (v < best)
- {
- if (bestValue)
- *bestValue = FcValueCanonicalize(&v2->value);
- best = v;
- }
- if (v1->binding == FcValueBindingStrong)
- {
- if (v < bestStrong)
- bestStrong = v;
- }
- else
- {
- if (v < bestWeak)
- bestWeak = v;
- }
- }
- j++;
- }
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf (" %s: %g ", FcObjectName (object), best);
- FcValueListPrint (v1orig);
- printf (", ");
- FcValueListPrint (v2orig);
- printf ("\n");
- }
- if (value)
- {
- int weak = match->weak;
- int strong = match->strong;
- if (weak == strong)
- value[strong] += best;
- else
- {
- value[weak] += bestWeak;
- value[strong] += bestStrong;
- }
- }
- return FcTrue;
-}
-
-/*
- * Return a value indicating the distance between the two lists of
- * values
- */
-
-static FcBool
-FcCompare (FcPattern *pat,
- FcPattern *fnt,
- double *value,
- FcResult *result)
-{
- int i, i1, i2;
-
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- value[i] = 0.0;
-
- i1 = 0;
- i2 = 0;
- while (i1 < pat->num && i2 < fnt->num)
- {
- FcPatternElt *elt_i1 = &FcPatternElts(pat)[i1];
- FcPatternElt *elt_i2 = &FcPatternElts(fnt)[i2];
-
- i = FcObjectCompare(elt_i1->object, elt_i2->object);
- if (i > 0)
- i2++;
- else if (i < 0)
- i1++;
- else
- {
- if (!FcCompareValueList (elt_i1->object,
- FcPatternEltValues(elt_i1),
- FcPatternEltValues(elt_i2),
- 0, value, result))
- return FcFalse;
- i1++;
- i2++;
- }
- }
- return FcTrue;
-}
-
-FcPattern *
-FcFontRenderPrepare (FcConfig *config,
- FcPattern *pat,
- FcPattern *font)
-{
- FcPattern *new;
- int i;
- FcPatternElt *fe, *pe;
- FcValue v;
- FcResult result;
-
- new = FcPatternCreate ();
- if (!new)
- return 0;
- for (i = 0; i < font->num; i++)
- {
- fe = &FcPatternElts(font)[i];
- pe = FcPatternObjectFindElt (pat, fe->object);
- if (pe)
- {
- if (!FcCompareValueList (pe->object, FcPatternEltValues(pe),
- FcPatternEltValues(fe), &v, 0, &result))
- {
- FcPatternDestroy (new);
- return 0;
- }
- }
- else
- v = FcValueCanonicalize(&FcPatternEltValues (fe)->value);
- FcPatternObjectAdd (new, fe->object, v, FcFalse);
- }
- for (i = 0; i < pat->num; i++)
- {
- pe = &FcPatternElts(pat)[i];
- fe = FcPatternObjectFindElt (font, pe->object);
- if (!fe)
- {
- v = FcValueCanonicalize(&FcPatternEltValues(pe)->value);
- FcPatternObjectAdd (new, pe->object, v, FcTrue);
- }
- }
-
- FcConfigSubstituteWithPat (config, new, pat, FcMatchFont);
- return new;
-}
-
-static FcPattern *
-FcFontSetMatchInternal (FcConfig *config,
- FcFontSet **sets,
- int nsets,
- FcPattern *p,
- FcResult *result)
-{
- double score[NUM_MATCH_VALUES], bestscore[NUM_MATCH_VALUES];
- int f;
- FcFontSet *s;
- FcPattern *best;
- int i;
- int set;
-
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- bestscore[i] = 0;
- best = 0;
- if (FcDebug () & FC_DBG_MATCH)
- {
- printf ("Match ");
- FcPatternPrint (p);
- }
- for (set = 0; set < nsets; set++)
- {
- s = sets[set];
- if (!s)
- continue;
- for (f = 0; f < s->nfont; f++)
- {
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf ("Font %d ", f);
- FcPatternPrint (s->fonts[f]);
- }
- if (!FcCompare (p, s->fonts[f], score, result))
- return 0;
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf ("Score");
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- {
- printf (" %g", score[i]);
- }
- printf ("\n");
- }
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- {
- if (best && bestscore[i] < score[i])
- break;
- if (!best || score[i] < bestscore[i])
- {
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- bestscore[i] = score[i];
- best = s->fonts[f];
- break;
- }
- }
- }
- }
- if (FcDebug () & FC_DBG_MATCH)
- {
- printf ("Best score");
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- printf (" %g", bestscore[i]);
- printf ("\n");
- FcPatternPrint (best);
- }
- if (!best)
- {
- *result = FcResultNoMatch;
- return 0;
- }
- return best;
-}
-
-FcPattern *
-FcFontSetMatch (FcConfig *config,
- FcFontSet **sets,
- int nsets,
- FcPattern *p,
- FcResult *result)
-{
- FcPattern *best;
-
- if (!config)
- {
- config = FcConfigGetCurrent ();
- if (!config)
- return 0;
- }
- best = FcFontSetMatchInternal (config, sets, nsets, p, result);
- if (best)
- return FcFontRenderPrepare (config, p, best);
- else
- return NULL;
-}
-
-FcPattern *
-FcFontMatch (FcConfig *config,
- FcPattern *p,
- FcResult *result)
-{
- FcFontSet *sets[2];
- int nsets;
- FcPattern *best;
-
- if (!config)
- {
- config = FcConfigGetCurrent ();
- if (!config)
- return 0;
- }
- nsets = 0;
- if (config->fonts[FcSetSystem])
- sets[nsets++] = config->fonts[FcSetSystem];
- if (config->fonts[FcSetApplication])
- sets[nsets++] = config->fonts[FcSetApplication];
-
- best = FcFontSetMatchInternal (config, sets, nsets, p, result);
- if (best)
- return FcFontRenderPrepare (config, p, best);
- else
- return NULL;
-}
-
-typedef struct _FcSortNode {
- FcPattern *pattern;
- double score[NUM_MATCH_VALUES];
-} FcSortNode;
-
-static int
-FcSortCompare (const void *aa, const void *ab)
-{
- FcSortNode *a = *(FcSortNode **) aa;
- FcSortNode *b = *(FcSortNode **) ab;
- double *as = &a->score[0];
- double *bs = &b->score[0];
- double ad = 0, bd = 0;
- int i;
-
- i = NUM_MATCH_VALUES;
- while (i-- && (ad = *as++) == (bd = *bs++))
- ;
- return ad < bd ? -1 : ad > bd ? 1 : 0;
-}
-
-static FcBool
-FcSortWalk (FcSortNode **n, int nnode, FcFontSet *fs, FcCharSet **csp, FcBool trim)
-{
- FcBool ret = FcFalse;
- FcCharSet *cs;
-
- cs = 0;
- if (trim || csp)
- {
- cs = FcCharSetCreate ();
- if (cs == NULL)
- goto bail;
- }
-
- while (nnode--)
- {
- FcSortNode *node = *n++;
- FcBool adds_chars = FcFalse;
-
- /*
- * Only fetch node charset if we'd need it
- */
- if (cs)
- {
- FcCharSet *ncs;
-
- if (FcPatternGetCharSet (node->pattern, FC_CHARSET, 0, &ncs) !=
- FcResultMatch)
- continue;
-
- if (!FcCharSetMerge (cs, ncs, &adds_chars))
- goto bail;
- }
-
- /*
- * If this font isn't a subset of the previous fonts,
- * add it to the list
- */
- if (!trim || adds_chars)
- {
- FcPatternReference (node->pattern);
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf ("Add ");
- FcPatternPrint (node->pattern);
- }
- if (!FcFontSetAdd (fs, node->pattern))
- {
- FcPatternDestroy (node->pattern);
- goto bail;
- }
- }
- }
- if (csp)
- {
- *csp = cs;
- cs = 0;
- }
-
- ret = FcTrue;
-
-bail:
- if (cs)
- FcCharSetDestroy (cs);
-
- return ret;
-}
-
-void
-FcFontSetSortDestroy (FcFontSet *fs)
-{
- FcFontSetDestroy (fs);
-}
-
-FcFontSet *
-FcFontSetSort (FcConfig *config,
- FcFontSet **sets,
- int nsets,
- FcPattern *p,
- FcBool trim,
- FcCharSet **csp,
- FcResult *result)
-{
- FcFontSet *ret;
- FcFontSet *s;
- FcSortNode *nodes;
- FcSortNode **nodeps, **nodep;
- int nnodes;
- FcSortNode *new;
- int set;
- int f;
- int i;
- int nPatternLang;
- FcBool *patternLangSat;
- FcValue patternLang;
-
- if (FcDebug () & FC_DBG_MATCH)
- {
- printf ("Sort ");
- FcPatternPrint (p);
- }
- nnodes = 0;
- for (set = 0; set < nsets; set++)
- {
- s = sets[set];
- if (!s)
- continue;
- nnodes += s->nfont;
- }
- if (!nnodes)
- goto bail0;
-
- for (nPatternLang = 0;
- FcPatternGet (p, FC_LANG, nPatternLang, &patternLang) == FcResultMatch;
- nPatternLang++)
- ;
-
- /* freed below */
- nodes = malloc (nnodes * sizeof (FcSortNode) +
- nnodes * sizeof (FcSortNode *) +
- nPatternLang * sizeof (FcBool));
- if (!nodes)
- goto bail0;
- nodeps = (FcSortNode **) (nodes + nnodes);
- patternLangSat = (FcBool *) (nodeps + nnodes);
-
- new = nodes;
- nodep = nodeps;
- for (set = 0; set < nsets; set++)
- {
- s = sets[set];
- if (!s)
- continue;
- for (f = 0; f < s->nfont; f++)
- {
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf ("Font %d ", f);
- FcPatternPrint (s->fonts[f]);
- }
- new->pattern = s->fonts[f];
- if (!FcCompare (p, new->pattern, new->score, result))
- goto bail1;
- if (FcDebug () & FC_DBG_MATCHV)
- {
- printf ("Score");
- for (i = 0; i < NUM_MATCH_VALUES; i++)
- {
- printf (" %g", new->score[i]);
- }
- printf ("\n");
- }
- *nodep = new;
- new++;
- nodep++;
- }
- }
-
- nnodes = new - nodes;
-
- qsort (nodeps, nnodes, sizeof (FcSortNode *),
- FcSortCompare);
-
- for (i = 0; i < nPatternLang; i++)
- patternLangSat[i] = FcFalse;
-
- for (f = 0; f < nnodes; f++)
- {
- FcBool satisfies = FcFalse;
- /*
- * If this node matches any language, go check
- * which ones and satisfy those entries
- */
- if (nodeps[f]->score[MATCH_LANG_INDEX] < 200)
- {
- for (i = 0; i < nPatternLang; i++)
- {
- FcValue nodeLang;
-
- if (!patternLangSat[i] &&
- FcPatternGet (p, FC_LANG, i, &patternLang) == FcResultMatch &&
- FcPatternGet (nodeps[f]->pattern, FC_LANG, 0, &nodeLang) == FcResultMatch)
- {
- double compare = FcCompareLang (&patternLang, &nodeLang);
- if (compare >= 0 && compare < 2)
- {
- if (FcDebug () & FC_DBG_MATCHV)
- {
- FcChar8 *family;
- FcChar8 *style;
-
- if (FcPatternGetString (nodeps[f]->pattern, FC_FAMILY, 0, &family) == FcResultMatch &&
- FcPatternGetString (nodeps[f]->pattern, FC_STYLE, 0, &style) == FcResultMatch)
- printf ("Font %s:%s matches language %d\n", family, style, i);
- }
- patternLangSat[i] = FcTrue;
- satisfies = FcTrue;
- break;
- }
- }
- }
- }
- if (!satisfies)
- nodeps[f]->score[MATCH_LANG_INDEX] = 10000.0;
- }
-
- /*
- * Re-sort once the language issues have been settled
- */
- qsort (nodeps, nnodes, sizeof (FcSortNode *),
- FcSortCompare);
-
- ret = FcFontSetCreate ();
- if (!ret)
- goto bail1;
-
- if (!FcSortWalk (nodeps, nnodes, ret, csp, trim))
- goto bail2;
-
- free (nodes);
-
- if (FcDebug() & FC_DBG_MATCH)
- {
- printf ("First font ");
- FcPatternPrint (ret->fonts[0]);
- }
- return ret;
-
-bail2:
- FcFontSetDestroy (ret);
-bail1:
- free (nodes);
-bail0:
- return 0;
-}
-
-FcFontSet *
-FcFontSort (FcConfig *config,
- FcPattern *p,
- FcBool trim,
- FcCharSet **csp,
- FcResult *result)
-{
- FcFontSet *sets[2];
- int nsets;
-
- if (!config)
- {
- config = FcConfigGetCurrent ();
- if (!config)
- return 0;
- }
- nsets = 0;
- if (config->fonts[FcSetSystem])
- sets[nsets++] = config->fonts[FcSetSystem];
- if (config->fonts[FcSetApplication])
- sets[nsets++] = config->fonts[FcSetApplication];
- return FcFontSetSort (config, sets, nsets, p, trim, csp, result);
-}
-#define __fcmatch__
-#include "fcaliastail.h"
-#undef __fcmatch__
+/*
+ * fontconfig/src/fcmatch.c
+ *
+ * Copyright © 2000 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the author(s) not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. The authors make no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "fcint.h"
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+
+static double
+FcCompareNumber (FcValue *value1, FcValue *value2)
+{
+ double v1, v2, v;
+
+ switch (value1->type) {
+ case FcTypeInteger:
+ v1 = (double) value1->u.i;
+ break;
+ case FcTypeDouble:
+ v1 = value1->u.d;
+ break;
+ default:
+ return -1.0;
+ }
+ switch (value2->type) {
+ case FcTypeInteger:
+ v2 = (double) value2->u.i;
+ break;
+ case FcTypeDouble:
+ v2 = value2->u.d;
+ break;
+ default:
+ return -1.0;
+ }
+ v = v2 - v1;
+ if (v < 0)
+ v = -v;
+ return v;
+}
+
+static double
+FcCompareString (FcValue *v1, FcValue *v2)
+{
+ return (double) FcStrCmpIgnoreCase (FcValueString(v1), FcValueString(v2)) != 0;
+}
+
+static double
+FcCompareFamily (FcValue *v1, FcValue *v2)
+{
+ /* rely on the guarantee in FcPatternObjectAddWithBinding that
+ * families are always FcTypeString. */
+ const FcChar8* v1_string = FcValueString(v1);
+ const FcChar8* v2_string = FcValueString(v2);
+
+ if (FcToLower(*v1_string) != FcToLower(*v2_string) &&
+ *v1_string != ' ' && *v2_string != ' ')
+ return 1.0;
+
+ return (double) FcStrCmpIgnoreBlanksAndCase (v1_string, v2_string) != 0;
+}
+
+static double
+FcCompareLang (FcValue *v1, FcValue *v2)
+{
+ FcLangResult result;
+ FcValue value1 = FcValueCanonicalize(v1), value2 = FcValueCanonicalize(v2);
+
+ switch (value1.type) {
+ case FcTypeLangSet:
+ switch (value2.type) {
+ case FcTypeLangSet:
+ result = FcLangSetCompare (value1.u.l, value2.u.l);
+ break;
+ case FcTypeString:
+ result = FcLangSetHasLang (value1.u.l,
+ value2.u.s);
+ break;
+ default:
+ return -1.0;
+ }
+ break;
+ case FcTypeString:
+ switch (value2.type) {
+ case FcTypeLangSet:
+ result = FcLangSetHasLang (value2.u.l, value1.u.s);
+ break;
+ case FcTypeString:
+ result = FcLangCompare (value1.u.s,
+ value2.u.s);
+ break;
+ default:
+ return -1.0;
+ }
+ break;
+ default:
+ return -1.0;
+ }
+ switch (result) {
+ case FcLangEqual:
+ return 0;
+ case FcLangDifferentCountry:
+ return 1;
+ case FcLangDifferentLang:
+ default:
+ return 2;
+ }
+}
+
+static double
+FcCompareBool (FcValue *v1, FcValue *v2)
+{
+ if (v2->type != FcTypeBool || v1->type != FcTypeBool)
+ return -1.0;
+ return (double) v2->u.b != v1->u.b;
+}
+
+static double
+FcCompareCharSet (FcValue *v1, FcValue *v2)
+{
+ return (double) FcCharSetSubtractCount (FcValueCharSet(v1), FcValueCharSet(v2));
+}
+
+static double
+FcCompareSize (FcValue *value1, FcValue *value2)
+{
+ double v1, v2, v;
+
+ switch (value1->type) {
+ case FcTypeInteger:
+ v1 = value1->u.i;
+ break;
+ case FcTypeDouble:
+ v1 = value1->u.d;
+ break;
+ default:
+ return -1;
+ }
+ switch (value2->type) {
+ case FcTypeInteger:
+ v2 = value2->u.i;
+ break;
+ case FcTypeDouble:
+ v2 = value2->u.d;
+ break;
+ default:
+ return -1;
+ }
+ if (v2 == 0)
+ return 0;
+ v = v2 - v1;
+ if (v < 0)
+ v = -v;
+ return v;
+}
+
+typedef struct _FcMatcher {
+ FcObject object;
+ double (*compare) (FcValue *value1, FcValue *value2);
+ int strong, weak;
+} FcMatcher;
+
+/*
+ * Order is significant, it defines the precedence of
+ * each value, earlier values are more significant than
+ * later values
+ */
+static const FcMatcher _FcMatchers [] = {
+ { FC_FOUNDRY_OBJECT, FcCompareString, 0, 0 },
+#define MATCH_FOUNDRY 0
+ { FC_CHARSET_OBJECT, FcCompareCharSet, 1, 1 },
+#define MATCH_CHARSET 1
+ { FC_FAMILY_OBJECT, FcCompareFamily, 2, 4 },
+#define MATCH_FAMILY 2
+ { FC_LANG_OBJECT, FcCompareLang, 3, 3 },
+#define MATCH_LANG 3
+#define MATCH_LANG_INDEX 3
+ { FC_SPACING_OBJECT, FcCompareNumber, 5, 5 },
+#define MATCH_SPACING 4
+ { FC_PIXEL_SIZE_OBJECT, FcCompareSize, 6, 6 },
+#define MATCH_PIXEL_SIZE 5
+ { FC_STYLE_OBJECT, FcCompareString, 7, 7 },
+#define MATCH_STYLE 6
+ { FC_SLANT_OBJECT, FcCompareNumber, 8, 8 },
+#define MATCH_SLANT 7
+ { FC_WEIGHT_OBJECT, FcCompareNumber, 9, 9 },
+#define MATCH_WEIGHT 8
+ { FC_WIDTH_OBJECT, FcCompareNumber, 10, 10 },
+#define MATCH_WIDTH 9
+ { FC_DECORATIVE_OBJECT, FcCompareBool, 11, 11 },
+#define MATCH_DECORATIVE 10
+ { FC_ANTIALIAS_OBJECT, FcCompareBool, 12, 12 },
+#define MATCH_ANTIALIAS 11
+ { FC_RASTERIZER_OBJECT, FcCompareString, 13, 13 },
+#define MATCH_RASTERIZER 12
+ { FC_OUTLINE_OBJECT, FcCompareBool, 14, 14 },
+#define MATCH_OUTLINE 13
+ { FC_FONTVERSION_OBJECT, FcCompareNumber, 15, 15 },
+#define MATCH_FONTVERSION 14
+};
+
+#define NUM_MATCH_VALUES 16
+
+static const FcMatcher*
+FcObjectToMatcher (FcObject object)
+{
+ int i;
+
+ i = -1;
+ switch (object) {
+ case FC_FOUNDRY_OBJECT:
+ i = MATCH_FOUNDRY; break;
+ case FC_FONTVERSION_OBJECT:
+ i = MATCH_FONTVERSION; break;
+ case FC_FAMILY_OBJECT:
+ i = MATCH_FAMILY; break;
+ case FC_CHARSET_OBJECT:
+ i = MATCH_CHARSET; break;
+ case FC_ANTIALIAS_OBJECT:
+ i = MATCH_ANTIALIAS; break;
+ case FC_LANG_OBJECT:
+ i = MATCH_LANG; break;
+ case FC_SPACING_OBJECT:
+ i = MATCH_SPACING; break;
+ case FC_STYLE_OBJECT:
+ i = MATCH_STYLE; break;
+ case FC_SLANT_OBJECT:
+ i = MATCH_SLANT; break;
+ case FC_PIXEL_SIZE_OBJECT:
+ i = MATCH_PIXEL_SIZE; break;
+ case FC_WIDTH_OBJECT:
+ i = MATCH_WIDTH; break;
+ case FC_WEIGHT_OBJECT:
+ i = MATCH_WEIGHT; break;
+ case FC_RASTERIZER_OBJECT:
+ i = MATCH_RASTERIZER; break;
+ case FC_OUTLINE_OBJECT:
+ i = MATCH_OUTLINE; break;
+ case FC_DECORATIVE_OBJECT:
+ i = MATCH_DECORATIVE; break;
+ }
+
+ if (i < 0)
+ return NULL;
+
+ return _FcMatchers+i;
+}
+
+static FcBool
+FcCompareValueList (FcObject object,
+ FcValueListPtr v1orig, /* pattern */
+ FcValueListPtr v2orig, /* target */
+ FcValue *bestValue,
+ double *value,
+ FcResult *result)
+{
+ FcValueListPtr v1, v2;
+ double v, best, bestStrong, bestWeak;
+ int j;
+ const FcMatcher *match = FcObjectToMatcher(object);
+
+ if (!match)
+ {
+ if (bestValue)
+ *bestValue = FcValueCanonicalize(&v2orig->value);
+ return FcTrue;
+ }
+
+ best = 1e99;
+ bestStrong = 1e99;
+ bestWeak = 1e99;
+ j = 1;
+ for (v1 = v1orig; v1; v1 = FcValueListNext(v1))
+ {
+ for (v2 = v2orig; v2; v2 = FcValueListNext(v2))
+ {
+ v = (match->compare) (&v1->value, &v2->value);
+ if (v < 0)
+ {
+ *result = FcResultTypeMismatch;
+ return FcFalse;
+ }
+ v = v * 1000 + j;
+ if (v < best)
+ {
+ if (bestValue)
+ *bestValue = FcValueCanonicalize(&v2->value);
+ best = v;
+ }
+ if (v1->binding == FcValueBindingStrong)
+ {
+ if (v < bestStrong)
+ bestStrong = v;
+ }
+ else
+ {
+ if (v < bestWeak)
+ bestWeak = v;
+ }
+ }
+ j++;
+ }
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf (" %s: %g ", FcObjectName (object), best);
+ FcValueListPrint (v1orig);
+ printf (", ");
+ FcValueListPrint (v2orig);
+ printf ("\n");
+ }
+ if (value)
+ {
+ int weak = match->weak;
+ int strong = match->strong;
+ if (weak == strong)
+ value[strong] += best;
+ else
+ {
+ value[weak] += bestWeak;
+ value[strong] += bestStrong;
+ }
+ }
+ return FcTrue;
+}
+
+/*
+ * Return a value indicating the distance between the two lists of
+ * values
+ */
+
+static FcBool
+FcCompare (FcPattern *pat,
+ FcPattern *fnt,
+ double *value,
+ FcResult *result)
+{
+ int i, i1, i2;
+
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ value[i] = 0.0;
+
+ i1 = 0;
+ i2 = 0;
+ while (i1 < pat->num && i2 < fnt->num)
+ {
+ FcPatternElt *elt_i1 = &FcPatternElts(pat)[i1];
+ FcPatternElt *elt_i2 = &FcPatternElts(fnt)[i2];
+
+ i = FcObjectCompare(elt_i1->object, elt_i2->object);
+ if (i > 0)
+ i2++;
+ else if (i < 0)
+ i1++;
+ else
+ {
+ if (!FcCompareValueList (elt_i1->object,
+ FcPatternEltValues(elt_i1),
+ FcPatternEltValues(elt_i2),
+ 0, value, result))
+ return FcFalse;
+ i1++;
+ i2++;
+ }
+ }
+ return FcTrue;
+}
+
+FcPattern *
+FcFontRenderPrepare (FcConfig *config,
+ FcPattern *pat,
+ FcPattern *font)
+{
+ FcPattern *new;
+ int i;
+ FcPatternElt *fe, *pe;
+ FcValue v;
+ FcResult result;
+
+ new = FcPatternCreate ();
+ if (!new)
+ return 0;
+ for (i = 0; i < font->num; i++)
+ {
+ fe = &FcPatternElts(font)[i];
+ pe = FcPatternObjectFindElt (pat, fe->object);
+ if (pe)
+ {
+ if (!FcCompareValueList (pe->object, FcPatternEltValues(pe),
+ FcPatternEltValues(fe), &v, 0, &result))
+ {
+ FcPatternDestroy (new);
+ return 0;
+ }
+ }
+ else
+ v = FcValueCanonicalize(&FcPatternEltValues (fe)->value);
+ FcPatternObjectAdd (new, fe->object, v, FcFalse);
+ }
+ for (i = 0; i < pat->num; i++)
+ {
+ pe = &FcPatternElts(pat)[i];
+ fe = FcPatternObjectFindElt (font, pe->object);
+ if (!fe)
+ {
+ v = FcValueCanonicalize(&FcPatternEltValues(pe)->value);
+ FcPatternObjectAdd (new, pe->object, v, FcTrue);
+ }
+ }
+
+ FcConfigSubstituteWithPat (config, new, pat, FcMatchFont);
+ return new;
+}
+
+static FcPattern *
+FcFontSetMatchInternal (FcConfig *config,
+ FcFontSet **sets,
+ int nsets,
+ FcPattern *p,
+ FcResult *result)
+{
+ double score[NUM_MATCH_VALUES], bestscore[NUM_MATCH_VALUES];
+ int f;
+ FcFontSet *s;
+ FcPattern *best;
+ int i;
+ int set;
+
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ bestscore[i] = 0;
+ best = 0;
+ if (FcDebug () & FC_DBG_MATCH)
+ {
+ printf ("Match ");
+ FcPatternPrint (p);
+ }
+ for (set = 0; set < nsets; set++)
+ {
+ s = sets[set];
+ if (!s)
+ continue;
+ for (f = 0; f < s->nfont; f++)
+ {
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf ("Font %d ", f);
+ FcPatternPrint (s->fonts[f]);
+ }
+ if (!FcCompare (p, s->fonts[f], score, result))
+ return 0;
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf ("Score");
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ {
+ printf (" %g", score[i]);
+ }
+ printf ("\n");
+ }
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ {
+ if (best && bestscore[i] < score[i])
+ break;
+ if (!best || score[i] < bestscore[i])
+ {
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ bestscore[i] = score[i];
+ best = s->fonts[f];
+ break;
+ }
+ }
+ }
+ }
+ if (FcDebug () & FC_DBG_MATCH)
+ {
+ printf ("Best score");
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ printf (" %g", bestscore[i]);
+ printf ("\n");
+ FcPatternPrint (best);
+ }
+ if (!best)
+ {
+ *result = FcResultNoMatch;
+ return 0;
+ }
+ return best;
+}
+
+FcPattern *
+FcFontSetMatch (FcConfig *config,
+ FcFontSet **sets,
+ int nsets,
+ FcPattern *p,
+ FcResult *result)
+{
+ FcPattern *best;
+
+ if (!config)
+ {
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return 0;
+ }
+ best = FcFontSetMatchInternal (config, sets, nsets, p, result);
+ if (best)
+ return FcFontRenderPrepare (config, p, best);
+ else
+ return NULL;
+}
+
+FcPattern *
+FcFontMatch (FcConfig *config,
+ FcPattern *p,
+ FcResult *result)
+{
+ FcFontSet *sets[2];
+ int nsets;
+ FcPattern *best;
+
+ if (!config)
+ {
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return 0;
+ }
+ nsets = 0;
+ if (config->fonts[FcSetSystem])
+ sets[nsets++] = config->fonts[FcSetSystem];
+ if (config->fonts[FcSetApplication])
+ sets[nsets++] = config->fonts[FcSetApplication];
+
+ best = FcFontSetMatchInternal (config, sets, nsets, p, result);
+ if (best)
+ return FcFontRenderPrepare (config, p, best);
+ else
+ return NULL;
+}
+
+typedef struct _FcSortNode {
+ FcPattern *pattern;
+ double score[NUM_MATCH_VALUES];
+} FcSortNode;
+
+static int
+FcSortCompare (const void *aa, const void *ab)
+{
+ FcSortNode *a = *(FcSortNode **) aa;
+ FcSortNode *b = *(FcSortNode **) ab;
+ double *as = &a->score[0];
+ double *bs = &b->score[0];
+ double ad = 0, bd = 0;
+ int i;
+
+ i = NUM_MATCH_VALUES;
+ while (i-- && (ad = *as++) == (bd = *bs++))
+ ;
+ return ad < bd ? -1 : ad > bd ? 1 : 0;
+}
+
+static FcBool
+FcSortWalk (FcSortNode **n, int nnode, FcFontSet *fs, FcCharSet **csp, FcBool trim)
+{
+ FcBool ret = FcFalse;
+ FcCharSet *cs;
+
+ cs = 0;
+ if (trim || csp)
+ {
+ cs = FcCharSetCreate ();
+ if (cs == NULL)
+ goto bail;
+ }
+
+ while (nnode--)
+ {
+ FcSortNode *node = *n++;
+ FcBool adds_chars = FcFalse;
+
+ /*
+ * Only fetch node charset if we'd need it
+ */
+ if (cs)
+ {
+ FcCharSet *ncs;
+
+ if (FcPatternGetCharSet (node->pattern, FC_CHARSET, 0, &ncs) !=
+ FcResultMatch)
+ continue;
+
+ if (!FcCharSetMerge (cs, ncs, &adds_chars))
+ goto bail;
+ }
+
+ /*
+ * If this font isn't a subset of the previous fonts,
+ * add it to the list
+ */
+ if (!trim || adds_chars)
+ {
+ FcPatternReference (node->pattern);
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf ("Add ");
+ FcPatternPrint (node->pattern);
+ }
+ if (!FcFontSetAdd (fs, node->pattern))
+ {
+ FcPatternDestroy (node->pattern);
+ goto bail;
+ }
+ }
+ }
+ if (csp)
+ {
+ *csp = cs;
+ cs = 0;
+ }
+
+ ret = FcTrue;
+
+bail:
+ if (cs)
+ FcCharSetDestroy (cs);
+
+ return ret;
+}
+
+void
+FcFontSetSortDestroy (FcFontSet *fs)
+{
+ FcFontSetDestroy (fs);
+}
+
+FcFontSet *
+FcFontSetSort (FcConfig *config,
+ FcFontSet **sets,
+ int nsets,
+ FcPattern *p,
+ FcBool trim,
+ FcCharSet **csp,
+ FcResult *result)
+{
+ FcFontSet *ret;
+ FcFontSet *s;
+ FcSortNode *nodes;
+ FcSortNode **nodeps, **nodep;
+ int nnodes;
+ FcSortNode *new;
+ int set;
+ int f;
+ int i;
+ int nPatternLang;
+ FcBool *patternLangSat;
+ FcValue patternLang;
+
+ if (FcDebug () & FC_DBG_MATCH)
+ {
+ printf ("Sort ");
+ FcPatternPrint (p);
+ }
+ nnodes = 0;
+ for (set = 0; set < nsets; set++)
+ {
+ s = sets[set];
+ if (!s)
+ continue;
+ nnodes += s->nfont;
+ }
+ if (!nnodes)
+ goto bail0;
+
+ for (nPatternLang = 0;
+ FcPatternGet (p, FC_LANG, nPatternLang, &patternLang) == FcResultMatch;
+ nPatternLang++)
+ ;
+
+ /* freed below */
+ nodes = malloc (nnodes * sizeof (FcSortNode) +
+ nnodes * sizeof (FcSortNode *) +
+ nPatternLang * sizeof (FcBool));
+ if (!nodes)
+ goto bail0;
+ nodeps = (FcSortNode **) (nodes + nnodes);
+ patternLangSat = (FcBool *) (nodeps + nnodes);
+
+ new = nodes;
+ nodep = nodeps;
+ for (set = 0; set < nsets; set++)
+ {
+ s = sets[set];
+ if (!s)
+ continue;
+ for (f = 0; f < s->nfont; f++)
+ {
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf ("Font %d ", f);
+ FcPatternPrint (s->fonts[f]);
+ }
+ new->pattern = s->fonts[f];
+ if (!FcCompare (p, new->pattern, new->score, result))
+ goto bail1;
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ printf ("Score");
+ for (i = 0; i < NUM_MATCH_VALUES; i++)
+ {
+ printf (" %g", new->score[i]);
+ }
+ printf ("\n");
+ }
+ *nodep = new;
+ new++;
+ nodep++;
+ }
+ }
+
+ nnodes = new - nodes;
+
+ qsort (nodeps, nnodes, sizeof (FcSortNode *),
+ FcSortCompare);
+
+ for (i = 0; i < nPatternLang; i++)
+ patternLangSat[i] = FcFalse;
+
+ for (f = 0; f < nnodes; f++)
+ {
+ FcBool satisfies = FcFalse;
+ /*
+ * If this node matches any language, go check
+ * which ones and satisfy those entries
+ */
+ if (nodeps[f]->score[MATCH_LANG_INDEX] < 200)
+ {
+ for (i = 0; i < nPatternLang; i++)
+ {
+ FcValue nodeLang;
+
+ if (!patternLangSat[i] &&
+ FcPatternGet (p, FC_LANG, i, &patternLang) == FcResultMatch &&
+ FcPatternGet (nodeps[f]->pattern, FC_LANG, 0, &nodeLang) == FcResultMatch)
+ {
+ double compare = FcCompareLang (&patternLang, &nodeLang);
+ if (compare >= 0 && compare < 2)
+ {
+ if (FcDebug () & FC_DBG_MATCHV)
+ {
+ FcChar8 *family;
+ FcChar8 *style;
+
+ if (FcPatternGetString (nodeps[f]->pattern, FC_FAMILY, 0, &family) == FcResultMatch &&
+ FcPatternGetString (nodeps[f]->pattern, FC_STYLE, 0, &style) == FcResultMatch)
+ printf ("Font %s:%s matches language %d\n", family, style, i);
+ }
+ patternLangSat[i] = FcTrue;
+ satisfies = FcTrue;
+ break;
+ }
+ }
+ }
+ }
+ if (!satisfies)
+ nodeps[f]->score[MATCH_LANG_INDEX] = 10000.0;
+ }
+
+ /*
+ * Re-sort once the language issues have been settled
+ */
+ qsort (nodeps, nnodes, sizeof (FcSortNode *),
+ FcSortCompare);
+
+ ret = FcFontSetCreate ();
+ if (!ret)
+ goto bail1;
+
+ if (!FcSortWalk (nodeps, nnodes, ret, csp, trim))
+ goto bail2;
+
+ free (nodes);
+
+ if (FcDebug() & FC_DBG_MATCH)
+ {
+ printf ("First font ");
+ FcPatternPrint (ret->fonts[0]);
+ }
+ return ret;
+
+bail2:
+ FcFontSetDestroy (ret);
+bail1:
+ free (nodes);
+bail0:
+ return 0;
+}
+
+FcFontSet *
+FcFontSort (FcConfig *config,
+ FcPattern *p,
+ FcBool trim,
+ FcCharSet **csp,
+ FcResult *result)
+{
+ FcFontSet *sets[2];
+ int nsets;
+
+ if (!config)
+ {
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return 0;
+ }
+ nsets = 0;
+ if (config->fonts[FcSetSystem])
+ sets[nsets++] = config->fonts[FcSetSystem];
+ if (config->fonts[FcSetApplication])
+ sets[nsets++] = config->fonts[FcSetApplication];
+ return FcFontSetSort (config, sets, nsets, p, trim, csp, result);
+}
+#define __fcmatch__
+#include "fcaliastail.h"
+#undef __fcmatch__
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 04:03:16 +0000