// Thanks to http://stackoverflow.com/a/14634033/1447751
const std::string get_font_path(const std::string &name) {
std::string path;
const FcChar8 *fcname = reinterpret_cast<const FcChar8 *>(name.c_str());
FcConfig *config = FcInitLoadConfigAndFonts();
// configure the search pattern,
// assume "name" is a std::string with the desired font name in it
FcPattern *pat = FcNameParse(fcname);
FcConfigSubstitute(config, pat, FcMatchPattern);
FcDefaultSubstitute(pat);
FcResult result;
// find the font
FcPattern *font = FcFontMatch(config, pat, &result);
if (font) {
FcChar8 *fcpath = NULL;
FcChar8 *fcfamily = NULL;
if (FcPatternGetString(font, FC_FAMILY, 0, &fcfamily) == FcResultMatch &&
(name.empty() || !FcStrCmpIgnoreCase(fcname, fcfamily)) // Empty name means searching for default font, otherwise make
// sure the returned font is exactly what we searched for
&&
FcPatternGetString(font, FC_FILE, 0, &fcpath) == FcResultMatch)
path = std::string(reinterpret_cast<char *>(fcpath));
FcPatternDestroy(font);
}
FcPatternDestroy(pat);
return path;
}
static double
FcCompareString (char *object, FcValue value1, FcValue value2)
{
if (value2.type != FcTypeString || value1.type != FcTypeString)
return -1.0;
return (double) FcStrCmpIgnoreCase (value1.u.s, value2.u.s) != 0;
}
const FcConstant *
FcNameGetConstant (const FcChar8 *string)
{
unsigned int i;
for (i = 0; i < NUM_FC_CONSTANTS; i++)
if (!FcStrCmpIgnoreCase (string, _FcBaseConstants[i].name))
return &_FcBaseConstants[i];
return 0;
}
const FcConstant *
FcNameGetConstant (FcChar8 *string)
{
const FcConstantList *l;
int i;
for (l = _FcConstants; l; l = l->next)
{
for (i = 0; i < l->nconsts; i++)
if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
return &l->consts[i];
}
return 0;
}
static double
FcCompareFilename (FcValue *v1, FcValue *v2)
{
const FcChar8 *s1 = FcValueString (v1), *s2 = FcValueString (v2);
if (FcStrCmp (s1, s2) == 0)
return 0.0;
else if (FcStrCmpIgnoreCase (s1, s2) == 0)
return 1.0;
else if (FcStrRegexCmp (s2, s1))
return 2.0;
else if (FcStrRegexCmpIgnoreCase (s2, s1))
return 3.0;
else
return 4.0;
}
FcBool
FcConfigCompareValue (const FcValue *left_o,
FcOp op,
const FcValue *right_o)
{
FcValue left = FcValueCanonicalize(left_o);
FcValue right = FcValueCanonicalize(right_o);
FcBool ret = FcFalse;
left = FcConfigPromote (left, right);
right = FcConfigPromote (right, left);
if (left.type == right.type)
{
switch (left.type) {
case FcTypeInteger:
break; /* FcConfigPromote prevents this from happening */
case FcTypeDouble:
switch (op) {
case FcOpEqual:
case FcOpContains:
case FcOpListing:
ret = left.u.d == right.u.d;
break;
case FcOpNotEqual:
case FcOpNotContains:
ret = left.u.d != right.u.d;
break;
case FcOpLess:
ret = left.u.d < right.u.d;
break;
case FcOpLessEqual:
ret = left.u.d <= right.u.d;
break;
case FcOpMore:
ret = left.u.d > right.u.d;
break;
case FcOpMoreEqual:
ret = left.u.d >= right.u.d;
break;
default:
break;
}
break;
case FcTypeBool:
switch (op) {
case FcOpEqual:
case FcOpContains:
case FcOpListing:
ret = left.u.b == right.u.b;
break;
case FcOpNotEqual:
case FcOpNotContains:
ret = left.u.b != right.u.b;
break;
default:
break;
}
break;
case FcTypeString:
switch (op) {
case FcOpEqual:
case FcOpListing:
ret = FcStrCmpIgnoreCase (left.u.s, right.u.s) == 0;
break;
case FcOpContains:
ret = FcStrStrIgnoreCase (left.u.s, right.u.s) != 0;
break;
case FcOpNotEqual:
ret = FcStrCmpIgnoreCase (left.u.s, right.u.s) != 0;
break;
case FcOpNotContains:
ret = FcStrStrIgnoreCase (left.u.s, right.u.s) == 0;
break;
default:
break;
}
break;
case FcTypeMatrix:
switch (op) {
case FcOpEqual:
case FcOpContains:
case FcOpListing:
ret = FcMatrixEqual (left.u.m, right.u.m);
break;
case FcOpNotEqual:
case FcOpNotContains:
ret = !FcMatrixEqual (left.u.m, right.u.m);
break;
default:
break;
}
break;
case FcTypeCharSet:
switch (op) {
case FcOpContains:
case FcOpListing:
/* left contains right if right is a subset of left */
ret = FcCharSetIsSubset (right.u.c, left.u.c);
break;
case FcOpNotContains:
/* left contains right if right is a subset of left */
ret = !FcCharSetIsSubset (right.u.c, left.u.c);
break;
case FcOpEqual:
ret = FcCharSetEqual (left.u.c, right.u.c);
break;
case FcOpNotEqual:
ret = !FcCharSetEqual (left.u.c, right.u.c);
break;
default:
break;
}
break;
case FcTypeLangSet:
switch (op) {
case FcOpContains:
case FcOpListing:
ret = FcLangSetContains (left.u.l, right.u.l);
break;
case FcOpNotContains:
ret = !FcLangSetContains (left.u.l, right.u.l);
break;
case FcOpEqual:
ret = FcLangSetEqual (left.u.l, right.u.l);
break;
case FcOpNotEqual:
ret = !FcLangSetEqual (left.u.l, right.u.l);
break;
default:
break;
}
break;
case FcTypeVoid:
switch (op) {
case FcOpEqual:
case FcOpContains:
case FcOpListing:
ret = FcTrue;
break;
default:
break;
}
break;
case FcTypeFTFace:
switch (op) {
case FcOpEqual:
case FcOpContains:
case FcOpListing:
ret = left.u.f == right.u.f;
break;
case FcOpNotEqual:
case FcOpNotContains:
ret = left.u.f != right.u.f;
break;
default:
break;
}
break;
}
}
else
{
if (op == FcOpNotEqual || op == FcOpNotContains)
ret = FcTrue;
}
return ret;
}
static double
FcCompareString (FcValue *v1, FcValue *v2)
{
return (double) FcStrCmpIgnoreCase (FcValueString(v1), FcValueString(v2)) != 0;
}
static int compare (const void *a, const void *b)
{
const Entry *as = a, *bs = b;
return FcStrCmpIgnoreCase ((const FcChar8 *) as->file, (const FcChar8 *) bs->file);
}
static int compare (const void *a, const void *b)
{
const FcChar8 *const *as = a, *const *bs = b;
return FcStrCmpIgnoreCase (*as, *bs);
}
FcFontSet *fcinfo_families_index(const FcPattern *filter)
{
int unused_int, f, nfamilies;
FcPattern *pattern, *match;
FcFontSet *fontset, *tmp,
*families;
FcResult r;
FcChar8 *family, *next_family, *normal_style, *style;
FcInit();
pattern = FcPatternDuplicate(filter);
fontset = fcinfo(NULL, filter, FcFalse, 5,
FC_FAMILY,
FC_STYLE,
FC_LANG,/* fonts like Misc Fixed need
to be sorted by LANG (subset-like) */
FC_PIXEL_SIZE,
FC_FILE); /* for identifying the best font in
FC_LANG terms */
if (fontset->nfont == 0)
return fontset;
tmp = fcinfo_match(fontset, pattern);
FcFontSetDestroy(fontset);
fontset = tmp;
if (FcPatternGetInteger(pattern, FC_WEIGHT, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR);
if (FcPatternGetInteger(pattern, FC_SLANT, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
if (FcPatternGetInteger(pattern, FC_WIDTH, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_WIDTH, FC_WIDTH_NORMAL);
/* choose 'normal' styles according to pattern */
families = FcFontSetCreate();
nfamilies = 0;
for (f = 0; f < fontset->nfont; )
{
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_FAMILY,
LANG_EN, &family)
== FcResultMatch);
FcPatternDel(pattern, FC_FAMILY);
FcPatternAddString(pattern, FC_FAMILY, family);
match = FcFontSetMatch(NULL, &fontset, 1, pattern, &r);
assert(fcinfo_get_translated_string(match, FC_STYLE, LANG_EN, &normal_style)
== FcResultMatch);
do
{
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_STYLE,
LANG_EN, &style)
== FcResultMatch);
if (FcStrCmpIgnoreCase(style, normal_style) == 0)
FcFontSetAdd(families, FcPatternDuplicate(fontset->fonts[f]));
if (++f == fontset->nfont)
break;
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_FAMILY,
LANG_EN, &next_family)
== FcResultMatch);
}
while (FcStrCmpIgnoreCase(family, next_family) == 0);
nfamilies++;
}
FcPatternDestroy(pattern);
FcFontSetDestroy(fontset);
return families;
}
FcFontSet * fcinfo_match(FcFontSet *fontset, const FcPattern *filter)
{
int f;
FcFontSet *result;
FcChar8 *family, *style, *file;
FcChar8 *next_family, *next_style;
double size;
FcBool scalable;
FcPattern *pat, *match = NULL;
FcResult r;
FcInit();
if (fontset->nfont == 0)
{
result = FcFontSetCreate();
return result;
}
/* fc-match "Misc Fixed:style=Bold" gives many files with
various pixelsizes plus two "encodings" ('general' and
'ISO8859-1', ISO8859-1 is subset of general)
we want only one card for family,style pair
for MiscFixedBold.html we will take informations from
file 9x18B.pcf.gz (biggest size and general encoding)
from fcinfo(), fontset is sorted a way that pattern
created from 9x18B.pcf.gz comes first in
"Misc Fixed:style=Bold" interval (the biggest pixel size
and subset of supported languages, see pattern_compare()). */
result = FcFontSetCreate();
for (f = 0; f < fontset->nfont; )
{
/* bitmap fonts: */
/* we are here always on the best file in FC_LANG terms */
/* we need it for displaying the widest range of supported languages */
/* identify it by FC_FILE for FcFontMatch() */
if (filter)
pat = FcPatternDuplicate(filter);
else
pat = FcPatternCreate();
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_FAMILY,
LANG_EN, &family) == FcResultMatch);
FcPatternAddString(pat, FC_FAMILY, family);
if (fcinfo_get_translated_string(fontset->fonts[f], FC_STYLE,
LANG_EN, &style) == FcResultMatch)
FcPatternAddString(pat, FC_STYLE, style);
if (FcPatternGetString(fontset->fonts[f], FC_FILE, 0, &file)
== FcResultMatch)
FcPatternAddString(pat, FC_FILE, file);
FcConfigSubstitute(NULL, pat, FcMatchPattern);
FcDefaultSubstitute(pat);
match = FcFontMatch(NULL, pat, &r);
assert(r == FcResultMatch);
/* should not be needed: FcConfigSubstitute(NULL, match, FcMatchFont); */
FcPatternDestroy(pat);
assert(FcPatternGetBool(match, FC_SCALABLE, 0, &scalable)
== FcResultMatch);
/* fprintf(stdout, "Family: %s Style: %s\n", next_family, next_style);
fprintf(stdout, " %s\n", file);*/
/* figure out sizes font provide (needed for specimen) and skip same */
/* family,style pairs (see e. g. Misc Fixed) */
if (! scalable)
{
next_family = family;
next_style = style;
/* unfortunately e. g. 'ETL Fixed' and 'ETL fixed'
are present on my system */
while (FcStrCmpIgnoreCase(next_family, family) == 0 &&
FcStrCmpIgnoreCase(next_style, style) == 0)
{
if (FcPatternGetDouble(fontset->fonts[f], FC_PIXEL_SIZE, 0, &size)
== FcResultMatch)
{
if (! pattern_contains_size(match, size))
{
FcPatternAddDouble(match, FC_PIXEL_SIZE, size);
if (FcPatternGetString(fontset->fonts[f], FC_FILE, 0, &file)
== FcResultMatch)
FcPatternAddString(match, FC_FILE, file);
/*fprintf(stdout, " %s\n", file);*/
}
}
if (f + 1 == fontset->nfont) /* last family,style pair at all */
{
f++;
break;
}
assert(fcinfo_get_translated_string(fontset->fonts[f + 1], FC_FAMILY,
LANG_EN, &next_family)
== FcResultMatch);
assert(fcinfo_get_translated_string(fontset->fonts[f + 1], FC_STYLE,
LANG_EN, &next_style)
== FcResultMatch);
f++;
}
}
else /* family Efont Serif Regular is spread (unintentionally) over */
{ /* 5 files (Efont Serif <X> should be spread over 2 files, */
/* normal and 'Alternate'), so this is needed anyway: */
FcPatternDel(match, FC_FILE);
next_family = family;
next_style = style;
while (FcStrCmpIgnoreCase(next_family, family) == 0 &&
FcStrCmpIgnoreCase(next_style, style) == 0)
{
if (FcPatternGetString(fontset->fonts[f], FC_FILE, 0, &file)
== FcResultMatch)
FcPatternAddString(match, FC_FILE, file);
if (f + 1 == fontset->nfont) /* last family,style pair at all */
{
f++;
break;
}
assert(fcinfo_get_translated_string(fontset->fonts[f + 1], FC_FAMILY,
LANG_EN, &next_family)
== FcResultMatch);
assert(fcinfo_get_translated_string(fontset->fonts[f + 1], FC_STYLE,
LANG_EN, &next_style)
== FcResultMatch);
f++;
}
}
/* don't add ethio16f-uni.pcf, johabg16.pcf and similar with reported
empty charset */
if (! empty_charset(match))
FcFontSetAdd(result, FcPatternDuplicate(match));
}
if (match)
FcPatternDestroy(match);
return result;
}
static FcBool
FcCompareValueList (const char *object,
FcValueList *v1orig, /* pattern */
FcValueList *v2orig, /* target */
FcValue *bestValue,
double *value,
FcResult *result)
{
FcValueList *v1, *v2;
double v, best, bestStrong, bestWeak;
int i;
int j;
/*
* Locate the possible matching entry by examining the
* first few characters in object
*/
i = -1;
switch (FcToLower (object[0])) {
case 'f':
switch (FcToLower (object[1])) {
case 'o':
switch (FcToLower (object[2])) {
case 'u':
i = MATCH_FOUNDRY; break;
case 'n':
i = MATCH_FONTVERSION; break;
}
break;
case 'a':
i = MATCH_FAMILY; break;
}
break;
case 'c':
i = MATCH_CHARSET; break;
case 'a':
i = MATCH_ANTIALIAS; break;
case 'l':
i = MATCH_LANG; break;
case 's':
switch (FcToLower (object[1])) {
case 'p':
i = MATCH_SPACING; break;
case 't':
i = MATCH_STYLE; break;
case 'l':
i = MATCH_SLANT; break;
}
break;
case 'p':
i = MATCH_PIXEL_SIZE; break;
case 'w':
switch (FcToLower (object[1])) {
case 'i':
i = MATCH_WIDTH; break;
case 'e':
i = MATCH_WEIGHT; break;
}
break;
case 'r':
i = MATCH_RASTERIZER; break;
case 'o':
i = MATCH_OUTLINE; break;
}
if (i == -1 ||
FcStrCmpIgnoreCase ((FcChar8 *) _FcMatchers[i].object,
(FcChar8 *) object) != 0)
{
if (bestValue)
*bestValue = v2orig->value;
return FcTrue;
}
#if 0
for (i = 0; i < NUM_MATCHER; i++)
{
if (!FcStrCmpIgnoreCase ((FcChar8 *) _FcMatchers[i].object,
(FcChar8 *) object))
break;
}
if (i == NUM_MATCHER)
{
if (bestValue)
*bestValue = v2orig->value;
return FcTrue;
}
#endif
best = 1e99;
bestStrong = 1e99;
bestWeak = 1e99;
j = 0;
for (v1 = v1orig; v1; v1 = v1->next)
{
for (v2 = v2orig; v2; v2 = v2->next)
{
v = (*_FcMatchers[i].compare) (_FcMatchers[i].object,
v1->value,
v2->value);
if (v < 0)
{
*result = FcResultTypeMismatch;
return FcFalse;
}
if (FcDebug () & FC_DBG_MATCHV)
printf (" v %g j %d ", v, j);
v = v * 100 + j;
if (v < best)
{
if (bestValue)
*bestValue = 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 ", object, best);
FcValueListPrint (v1orig);
printf (", ");
FcValueListPrint (v2orig);
printf ("\n");
}
if (value)
{
int weak = _FcMatchers[i].weak;
int strong = _FcMatchers[i].strong;
if (weak == strong)
value[strong] += best;
else
{
value[weak] += bestWeak;
value[strong] += bestStrong;
}
}
return FcTrue;
}