/* ftfont.c -- FreeType font driver.
Copyright (C) 2006-2018 Free Software Foundation, Inc.
Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
National Institute of Advanced Industrial Science and Technology (AIST)
Registration Number H13PRO009
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see . */
#include
#include
#include
#include
#include
#include "lisp.h"
#include "dispextern.h"
#include "character.h"
#include "charset.h"
#include "category.h"
#include "composite.h"
#include "font.h"
#include "ftfont.h"
static struct font_driver const ftfont_driver;
/* Flag to tell if FcInit is already called or not. */
static bool fc_initialized;
/* Handle to a FreeType library instance. */
static FT_Library ft_library;
/* Cache for FreeType fonts. */
static Lisp_Object freetype_font_cache;
/* Cache for FT_Face and FcCharSet. */
static Lisp_Object ft_face_cache;
/* The actual structure for FreeType font that can be cast to struct
font. */
struct ftfont_info
{
struct font font;
#ifdef HAVE_LIBOTF
/* The following four members must be here in this order to be
compatible with struct xftfont_info (in xftfont.c). */
bool maybe_otf; /* Flag to tell if this may be OTF or not. */
OTF *otf;
#endif /* HAVE_LIBOTF */
#ifdef HAVE_HARFBUZZ
hb_font_t *hb_font;
#endif /* HAVE_HARFBUZZ */
FT_Size ft_size;
int index;
FT_Matrix matrix;
};
size_t ftfont_info_size = sizeof (struct ftfont_info);
enum ftfont_cache_for
{
FTFONT_CACHE_FOR_FACE,
FTFONT_CACHE_FOR_CHARSET,
FTFONT_CACHE_FOR_ENTITY
};
static Lisp_Object ftfont_lookup_cache (Lisp_Object,
enum ftfont_cache_for);
#define SYMBOL_FcChar8(SYM) (FcChar8 *) SDATA (SYMBOL_NAME (SYM))
static struct
{
/* registry name */
const char *name;
/* characters to distinguish the charset from the others */
int uniquifier[6];
/* additional constraint by language */
const char *lang;
/* set on demand */
FcCharSet *fc_charset;
} fc_charset_table[] =
{ { "iso8859-1", { 0x00A0, 0x00A1, 0x00B4, 0x00BC, 0x00D0 } },
{ "iso8859-2", { 0x00A0, 0x010E }},
{ "iso8859-3", { 0x00A0, 0x0108 }},
{ "iso8859-4", { 0x00A0, 0x00AF, 0x0128, 0x0156, 0x02C7 }},
{ "iso8859-5", { 0x00A0, 0x0401 }},
{ "iso8859-6", { 0x00A0, 0x060C }},
{ "iso8859-7", { 0x00A0, 0x0384 }},
{ "iso8859-8", { 0x00A0, 0x05D0 }},
{ "iso8859-9", { 0x00A0, 0x00A1, 0x00BC, 0x011E }},
{ "iso8859-10", { 0x00A0, 0x00D0, 0x0128, 0x2015 }},
{ "iso8859-11", { 0x00A0, 0x0E01 }},
{ "iso8859-13", { 0x00A0, 0x201C }},
{ "iso8859-14", { 0x00A0, 0x0174 }},
{ "iso8859-15", { 0x00A0, 0x00A1, 0x00D0, 0x0152 }},
{ "iso8859-16", { 0x00A0, 0x0218}},
{ "gb2312.1980-0", { 0x4E13 }, "zh-cn"},
{ "big5-0", { 0xF6B1 }, "zh-tw" },
{ "jisx0208.1983-0", { 0x4E55 }, "ja"},
{ "ksc5601.1985-0", { 0xAC00 }, "ko"},
{ "cns11643.1992-1", { 0xFE32 }, "zh-tw"},
{ "cns11643.1992-2", { 0x4E33, 0x7934 }},
{ "cns11643.1992-3", { 0x201A9 }},
{ "cns11643.1992-4", { 0x20057 }},
{ "cns11643.1992-5", { 0x20000 }},
{ "cns11643.1992-6", { 0x20003 }},
{ "cns11643.1992-7", { 0x20055 }},
{ "gbk-0", { 0x4E06 }, "zh-cn"},
{ "jisx0212.1990-0", { 0x4E44 }},
{ "jisx0213.2000-1", { 0xFA10 }, "ja"},
{ "jisx0213.2000-2", { 0xFA49 }},
{ "jisx0213.2004-1", { 0x20B9F }},
{ "viscii1.1-1", { 0x1EA0, 0x1EAE, 0x1ED2 }, "vi"},
{ "tis620.2529-1", { 0x0E01 }, "th"},
{ "windows-1251", { 0x0401, 0x0490 }, "ru"},
{ "koi8-r", { 0x0401, 0x2219 }, "ru"},
{ "mulelao-1", { 0x0E81 }, "lo"},
{ "unicode-sip", { 0x20000 }},
{ NULL }
};
static bool
matching_prefix (char const *str, ptrdiff_t len, char const *pat)
{
return len == strlen (pat) && c_strncasecmp (str, pat, len) == 0;
}
/* Dirty hack for handing ADSTYLE property.
Fontconfig (actually the underlying FreeType) gives such ADSTYLE
font property of PCF/BDF fonts in FC_STYLE. And, "Bold",
"Oblique", "Italic", or any non-normal SWIDTH property names
(e.g. SemiCondensed) are appended. In addition, if there's no
ADSTYLE property nor non-normal WEIGHT/SLANT/SWIDTH properties,
"Regular" is used for FC_STYLE (see the function
pcf_interpret_style in src/pcf/pcfread.c of FreeType).
Unfortunately this behavior is not documented, so the following
code may fail if FreeType changes the behavior in the future. */
static Lisp_Object
get_adstyle_property (FcPattern *p)
{
FcChar8 *fcstr;
char *str, *end;
Lisp_Object adstyle;
#ifdef FC_FONTFORMAT
if ((FcPatternGetString (p, FC_FONTFORMAT, 0, &fcstr) == FcResultMatch)
&& xstrcasecmp ((char *) fcstr, "bdf") != 0
&& xstrcasecmp ((char *) fcstr, "pcf") != 0)
/* Not a BDF nor PCF font. */
return Qnil;
#endif
if (FcPatternGetString (p, FC_STYLE, 0, &fcstr) != FcResultMatch)
return Qnil;
str = (char *) fcstr;
for (end = str; *end && *end != ' '; end++);
if (matching_prefix (str, end - str, "Regular")
|| matching_prefix (str, end - str, "Bold")
|| matching_prefix (str, end - str, "Oblique")
|| matching_prefix (str, end - str, "Italic"))
return Qnil;
adstyle = font_intern_prop (str, end - str, 1);
if (font_style_to_value (FONT_WIDTH_INDEX, adstyle, 0) >= 0)
return Qnil;
return adstyle;
}
static Lisp_Object
ftfont_pattern_entity (FcPattern *p, Lisp_Object extra)
{
Lisp_Object key, cache, entity;
FcChar8 *str;
char *file;
int idx;
int numeric;
double dbl;
FcBool b;
if (FcPatternGetString (p, FC_FILE, 0, &str) != FcResultMatch)
return Qnil;
if (FcPatternGetInteger (p, FC_INDEX, 0, &idx) != FcResultMatch)
return Qnil;
file = (char *) str;
key = Fcons (build_unibyte_string (file), make_fixnum (idx));
cache = ftfont_lookup_cache (key, FTFONT_CACHE_FOR_ENTITY);
entity = XCAR (cache);
if (! NILP (entity))
{
Lisp_Object val = font_make_entity ();
int i;
for (i = 0; i < FONT_OBJLIST_INDEX; i++)
ASET (val, i, AREF (entity, i));
ASET (val, FONT_EXTRA_INDEX, Fcopy_sequence (extra));
font_put_extra (val, QCfont_entity, key);
return val;
}
entity = font_make_entity ();
XSETCAR (cache, entity);
ASET (entity, FONT_TYPE_INDEX, Qfreetype);
ASET (entity, FONT_REGISTRY_INDEX, Qiso10646_1);
if (FcPatternGetString (p, FC_FOUNDRY, 0, &str) == FcResultMatch)
{
char *s = (char *) str;
ASET (entity, FONT_FOUNDRY_INDEX, font_intern_prop (s, strlen (s), 1));
}
if (FcPatternGetString (p, FC_FAMILY, 0, &str) == FcResultMatch)
{
char *s = (char *) str;
ASET (entity, FONT_FAMILY_INDEX, font_intern_prop (s, strlen (s), 1));
}
if (FcPatternGetInteger (p, FC_WEIGHT, 0, &numeric) == FcResultMatch)
{
if (numeric >= FC_WEIGHT_REGULAR && numeric < FC_WEIGHT_MEDIUM)
numeric = FC_WEIGHT_MEDIUM;
FONT_SET_STYLE (entity, FONT_WEIGHT_INDEX, make_fixnum (numeric));
}
if (FcPatternGetInteger (p, FC_SLANT, 0, &numeric) == FcResultMatch)
{
numeric += 100;
FONT_SET_STYLE (entity, FONT_SLANT_INDEX, make_fixnum (numeric));
}
if (FcPatternGetInteger (p, FC_WIDTH, 0, &numeric) == FcResultMatch)
{
FONT_SET_STYLE (entity, FONT_WIDTH_INDEX, make_fixnum (numeric));
}
if (FcPatternGetDouble (p, FC_PIXEL_SIZE, 0, &dbl) == FcResultMatch)
{
ASET (entity, FONT_SIZE_INDEX, make_fixnum (dbl));
}
else
ASET (entity, FONT_SIZE_INDEX, make_fixnum (0));
if (FcPatternGetInteger (p, FC_SPACING, 0, &numeric) == FcResultMatch)
ASET (entity, FONT_SPACING_INDEX, make_fixnum (numeric));
if (FcPatternGetDouble (p, FC_DPI, 0, &dbl) == FcResultMatch)
{
int dpi = dbl;
ASET (entity, FONT_DPI_INDEX, make_fixnum (dpi));
}
if (FcPatternGetBool (p, FC_SCALABLE, 0, &b) == FcResultMatch
&& b == FcTrue)
{
ASET (entity, FONT_SIZE_INDEX, make_fixnum (0));
ASET (entity, FONT_AVGWIDTH_INDEX, make_fixnum (0));
}
else
{
/* As this font is not scalable, perhaps this is a BDF or PCF
font. */
FT_Face ft_face;
ASET (entity, FONT_ADSTYLE_INDEX, get_adstyle_property (p));
if ((ft_library || FT_Init_FreeType (&ft_library) == 0)
&& FT_New_Face (ft_library, file, idx, &ft_face) == 0)
{
BDF_PropertyRec rec;
if (FT_Get_BDF_Property (ft_face, "AVERAGE_WIDTH", &rec) == 0
&& rec.type == BDF_PROPERTY_TYPE_INTEGER)
ASET (entity, FONT_AVGWIDTH_INDEX, make_fixnum (rec.u.integer));
FT_Done_Face (ft_face);
}
}
ASET (entity, FONT_EXTRA_INDEX, Fcopy_sequence (extra));
font_put_extra (entity, QCfont_entity, key);
return entity;
}
static Lisp_Object ftfont_generic_family_list;
static Lisp_Object
ftfont_resolve_generic_family (Lisp_Object family, FcPattern *pattern)
{
Lisp_Object slot;
FcPattern *match;
FcResult result;
FcLangSet *langset;
family = Fintern (Fdowncase (SYMBOL_NAME (family)), Qnil);
if (EQ (family, Qmono))
family = Qmonospace;
else if (EQ (family, Qsans) || EQ (family, Qsans__serif))
family = Qsans_serif;
slot = assq_no_quit (family, ftfont_generic_family_list);
if (! CONSP (slot))
return Qnil;
if (! EQ (XCDR (slot), Qt))
return XCDR (slot);
pattern = FcPatternDuplicate (pattern);
if (! pattern)
goto err;
FcPatternDel (pattern, FC_FOUNDRY);
FcPatternDel (pattern, FC_FAMILY);
FcPatternAddString (pattern, FC_FAMILY, SYMBOL_FcChar8 (family));
if (FcPatternGetLangSet (pattern, FC_LANG, 0, &langset) != FcResultMatch)
{
/* This is to avoid the effect of locale. */
static const FcChar8 lang[] = "en";
langset = FcLangSetCreate ();
FcLangSetAdd (langset, lang);
FcPatternAddLangSet (pattern, FC_LANG, langset);
FcLangSetDestroy (langset);
}
FcConfigSubstitute (NULL, pattern, FcMatchPattern);
FcDefaultSubstitute (pattern);
match = FcFontMatch (NULL, pattern, &result);
if (match)
{
FcChar8 *fam;
if (FcPatternGetString (match, FC_FAMILY, 0, &fam) == FcResultMatch)
family = intern ((char *) fam);
}
else
family = Qnil;
XSETCDR (slot, family);
if (match) FcPatternDestroy (match);
err:
if (pattern) FcPatternDestroy (pattern);
return family;
}
struct ftfont_cache_data
{
FT_Face ft_face;
FcCharSet *fc_charset;
intptr_t face_refcount;
};
static Lisp_Object
ftfont_lookup_cache (Lisp_Object key, enum ftfont_cache_for cache_for)
{
Lisp_Object cache, val, entity;
struct ftfont_cache_data *cache_data;
if (FONT_ENTITY_P (key))
{
entity = key;
val = assq_no_quit (QCfont_entity, AREF (entity, FONT_EXTRA_INDEX));
eassert (CONSP (val));
key = XCDR (val);
}
else
entity = Qnil;
if (NILP (ft_face_cache))
cache = Qnil;
else
cache = Fgethash (key, ft_face_cache, Qnil);
if (NILP (cache))
{
if (NILP (ft_face_cache))
ft_face_cache = CALLN (Fmake_hash_table, QCtest, Qequal);
cache_data = xzalloc (sizeof *cache_data);
val = make_mint_ptr (cache_data);
cache = Fcons (Qnil, val);
Fputhash (key, cache, ft_face_cache);
}
else
{
val = XCDR (cache);
cache_data = xmint_pointer (val);
}
if (cache_for == FTFONT_CACHE_FOR_ENTITY)
return cache;
if (cache_for == FTFONT_CACHE_FOR_FACE
? ! cache_data->ft_face : ! cache_data->fc_charset)
{
char *filename = SSDATA (XCAR (key));
int idx = XFIXNUM (XCDR (key));
if (cache_for == FTFONT_CACHE_FOR_FACE)
{
if (! ft_library
&& FT_Init_FreeType (&ft_library) != 0)
return Qnil;
if (FT_New_Face (ft_library, filename, idx, &cache_data->ft_face)
!= 0)
return Qnil;
}
else
{
FcPattern *pat = NULL;
FcFontSet *fontset = NULL;
FcObjectSet *objset = NULL;
FcCharSet *charset = NULL;
pat = FcPatternBuild (0, FC_FILE, FcTypeString, (FcChar8 *) filename,
FC_INDEX, FcTypeInteger, idx, NULL);
if (! pat)
goto finish;
objset = FcObjectSetBuild (FC_CHARSET, FC_STYLE, NULL);
if (! objset)
goto finish;
fontset = FcFontList (NULL, pat, objset);
if (! fontset)
goto finish;
if (fontset && fontset->nfont > 0
&& (FcPatternGetCharSet (fontset->fonts[0], FC_CHARSET, 0,
&charset)
== FcResultMatch))
cache_data->fc_charset = FcCharSetCopy (charset);
else
cache_data->fc_charset = FcCharSetCreate ();
finish:
if (fontset)
FcFontSetDestroy (fontset);
if (objset)
FcObjectSetDestroy (objset);
if (pat)
FcPatternDestroy (pat);
}
}
return cache;
}
FcCharSet *
ftfont_get_fc_charset (Lisp_Object entity)
{
Lisp_Object val, cache;
struct ftfont_cache_data *cache_data;
cache = ftfont_lookup_cache (entity, FTFONT_CACHE_FOR_CHARSET);
val = XCDR (cache);
cache_data = xmint_pointer (val);
return cache_data->fc_charset;
}
#ifdef HAVE_LIBOTF
static OTF *
ftfont_get_otf (struct ftfont_info *ftfont_info)
{
OTF *otf;
if (ftfont_info->otf)
return ftfont_info->otf;
if (! ftfont_info->maybe_otf)
return NULL;
otf = OTF_open_ft_face (ftfont_info->ft_size->face);
if (! otf || OTF_get_table (otf, "head") < 0)
{
if (otf)
OTF_close (otf);
ftfont_info->maybe_otf = 0;
return NULL;
}
ftfont_info->otf = otf;
return otf;
}
#endif /* HAVE_LIBOTF */
#ifdef HAVE_HARFBUZZ
static hb_font_t *
ftfont_get_hb_font (struct ftfont_info *ftfont_info)
{
if (! ftfont_info->hb_font)
ftfont_info->hb_font
= hb_ft_font_create_referenced (ftfont_info->ft_size->face);
return ftfont_info->hb_font;
}
#endif /* HAVE_HARFBUZZ */
Lisp_Object
ftfont_get_cache (struct frame *f)
{
return freetype_font_cache;
}
static int
ftfont_get_charset (Lisp_Object registry)
{
char *str = SSDATA (SYMBOL_NAME (registry));
USE_SAFE_ALLOCA;
char *re = SAFE_ALLOCA (SBYTES (SYMBOL_NAME (registry)) * 2 + 1);
int i, j;
for (i = j = 0; i < SBYTES (SYMBOL_NAME (registry)); i++, j++)
{
if (str[i] == '.')
re[j++] = '\\';
else if (str[i] == '*')
re[j++] = '.';
re[j] = str[i];
if (re[j] == '?')
re[j] = '.';
}
re[j] = '\0';
AUTO_STRING_WITH_LEN (regexp, re, j);
for (i = 0; fc_charset_table[i].name; i++)
if (fast_c_string_match_ignore_case
(regexp, fc_charset_table[i].name,
strlen (fc_charset_table[i].name)) >= 0)
break;
SAFE_FREE ();
if (! fc_charset_table[i].name)
return -1;
if (! fc_charset_table[i].fc_charset)
{
FcCharSet *charset = FcCharSetCreate ();
int *uniquifier = fc_charset_table[i].uniquifier;
if (! charset)
return -1;
for (j = 0; uniquifier[j]; j++)
if (! FcCharSetAddChar (charset, uniquifier[j]))
{
FcCharSetDestroy (charset);
return -1;
}
fc_charset_table[i].fc_charset = charset;
}
return i;
}
struct OpenTypeSpec
{
Lisp_Object script;
unsigned int script_tag, langsys_tag;
int nfeatures[2];
unsigned int *features[2];
};
#define OTF_SYM_TAG(SYM, TAG) \
do { \
unsigned char *p = SDATA (SYMBOL_NAME (SYM)); \
TAG = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; \
} while (0)
#define OTF_TAG_STR(TAG, P) \
do { \
(P)[0] = (char) (TAG >> 24); \
(P)[1] = (char) ((TAG >> 16) & 0xFF); \
(P)[2] = (char) ((TAG >> 8) & 0xFF); \
(P)[3] = (char) (TAG & 0xFF); \
(P)[4] = '\0'; \
} while (0)
#ifdef HAVE_LIBOTF
#define OTF_TAG_SYM(SYM, TAG) \
do { \
char str[5]; \
\
OTF_TAG_STR (TAG, str); \
(SYM) = font_intern_prop (str, 4, 1); \
} while (0)
#endif
static struct OpenTypeSpec *
ftfont_get_open_type_spec (Lisp_Object otf_spec)
{
struct OpenTypeSpec *spec = malloc (sizeof *spec);
Lisp_Object val;
int i, j;
bool negative;
if (! spec)
return NULL;
spec->script = XCAR (otf_spec);
if (! NILP (spec->script))
{
OTF_SYM_TAG (spec->script, spec->script_tag);
val = assq_no_quit (spec->script, Votf_script_alist);
if (CONSP (val) && SYMBOLP (XCDR (val)))
spec->script = XCDR (val);
else
spec->script = Qnil;
}
else
spec->script_tag = 0x44464C54; /* "DFLT" */
otf_spec = XCDR (otf_spec);
spec->langsys_tag = 0;
if (! NILP (otf_spec))
{
val = XCAR (otf_spec);
if (! NILP (val))
OTF_SYM_TAG (val, spec->langsys_tag);
otf_spec = XCDR (otf_spec);
}
spec->nfeatures[0] = spec->nfeatures[1] = 0;
for (i = 0; i < 2 && ! NILP (otf_spec); i++, otf_spec = XCDR (otf_spec))
{
Lisp_Object len;
val = XCAR (otf_spec);
if (NILP (val))
continue;
len = Flength (val);
spec->features[i] =
(min (PTRDIFF_MAX, SIZE_MAX) / sizeof (int) < XFIXNUM (len)
? 0
: malloc (XFIXNUM (len) * sizeof *spec->features[i]));
if (! spec->features[i])
{
if (i > 0 && spec->features[0])
free (spec->features[0]);
free (spec);
return NULL;
}
for (j = 0, negative = 0; CONSP (val); val = XCDR (val))
{
if (NILP (XCAR (val)))
negative = 1;
else
{
unsigned int tag;
OTF_SYM_TAG (XCAR (val), tag);
spec->features[i][j++] = negative ? tag & 0x80000000 : tag;
}
}
spec->nfeatures[i] = j;
}
return spec;
}
static FcPattern *
ftfont_spec_pattern (Lisp_Object spec, char *otlayout, struct OpenTypeSpec **otspec, const char **langname)
{
Lisp_Object tmp, extra;
FcPattern *pattern = NULL;
FcCharSet *charset = NULL;
FcLangSet *langset = NULL;
int n;
int dpi = -1;
int scalable = -1;
Lisp_Object script = Qnil;
Lisp_Object registry;
int fc_charset_idx;
if ((n = FONT_SLANT_NUMERIC (spec)) >= 0
&& n < 100)
/* Fontconfig doesn't support reverse-italic/oblique. */
return NULL;
if (FIXNUMP (AREF (spec, FONT_DPI_INDEX)))
dpi = XFIXNUM (AREF (spec, FONT_DPI_INDEX));
if (FIXNUMP (AREF (spec, FONT_AVGWIDTH_INDEX))
&& XFIXNUM (AREF (spec, FONT_AVGWIDTH_INDEX)) == 0)
scalable = 1;
registry = AREF (spec, FONT_REGISTRY_INDEX);
if (NILP (registry)
|| EQ (registry, Qascii_0)
|| EQ (registry, Qiso10646_1)
|| EQ (registry, Qunicode_bmp))
fc_charset_idx = -1;
else
{
FcChar8 *lang;
fc_charset_idx = ftfont_get_charset (registry);
if (fc_charset_idx < 0)
return NULL;
charset = fc_charset_table[fc_charset_idx].fc_charset;
*langname = fc_charset_table[fc_charset_idx].lang;
lang = (FcChar8 *) *langname;
if (lang)
{
langset = FcLangSetCreate ();
if (! langset)
goto err;
FcLangSetAdd (langset, lang);
}
}
otlayout[0] = '\0';
for (extra = AREF (spec, FONT_EXTRA_INDEX);
CONSP (extra); extra = XCDR (extra))
{
Lisp_Object key, val;
key = XCAR (XCAR (extra)), val = XCDR (XCAR (extra));
if (EQ (key, QCdpi))
{
if (FIXNUMP (val))
dpi = XFIXNUM (val);
}
else if (EQ (key, QClang))
{
if (! langset)
langset = FcLangSetCreate ();
if (! langset)
goto err;
if (SYMBOLP (val))
{
if (! FcLangSetAdd (langset, SYMBOL_FcChar8 (val)))
goto err;
}
else
for (; CONSP (val); val = XCDR (val))
if (SYMBOLP (XCAR (val))
&& ! FcLangSetAdd (langset, SYMBOL_FcChar8 (XCAR (val))))
goto err;
}
else if (EQ (key, QCotf))
{
if (CONSP (val))
{
*otspec = ftfont_get_open_type_spec (val);
if (! *otspec)
return NULL;
strcpy (otlayout, "otlayout:");
OTF_TAG_STR ((*otspec)->script_tag, otlayout + 9);
script = (*otspec)->script;
}
}
else if (EQ (key, QCscript))
script = val;
else if (EQ (key, QCscalable))
scalable = ! NILP (val);
}
if (! NILP (script) && ! charset)
{
Lisp_Object chars = assq_no_quit (script, Vscript_representative_chars);
if (CONSP (chars) && CONSP (CDR (chars)))
{
charset = FcCharSetCreate ();
if (! charset)
goto err;
for (chars = XCDR (chars); CONSP (chars); chars = XCDR (chars))
if (CHARACTERP (XCAR (chars))
&& ! FcCharSetAddChar (charset, XFIXNAT (XCAR (chars))))
goto err;
}
}
pattern = FcPatternCreate ();
if (! pattern)
goto err;
tmp = AREF (spec, FONT_FOUNDRY_INDEX);
if (! NILP (tmp)
&& ! FcPatternAddString (pattern, FC_FOUNDRY, SYMBOL_FcChar8 (tmp)))
goto err;
tmp = AREF (spec, FONT_FAMILY_INDEX);
if (! NILP (tmp)
&& ! FcPatternAddString (pattern, FC_FAMILY, SYMBOL_FcChar8 (tmp)))
goto err;
if (charset
&& ! FcPatternAddCharSet (pattern, FC_CHARSET, charset))
goto err;
if (langset
&& ! FcPatternAddLangSet (pattern, FC_LANG, langset))
goto err;
if (dpi >= 0
&& ! FcPatternAddDouble (pattern, FC_DPI, dpi))
goto err;
if (scalable >= 0
&& ! FcPatternAddBool (pattern, FC_SCALABLE, scalable ? FcTrue : FcFalse))
goto err;
#if defined HAVE_XFT && defined FC_COLOR
/* We really don't like color fonts, they cause Xft crashes. See
Bug#30874. */
if (Vxft_ignore_color_fonts
&& ! FcPatternAddBool (pattern, FC_COLOR, FcFalse))
goto err;
#endif
goto finish;
err:
/* We come here because of unexpected error in fontconfig API call
(usually insufficient memory). */
if (pattern)
{
FcPatternDestroy (pattern);
pattern = NULL;
}
if (*otspec)
{
if ((*otspec)->nfeatures[0] > 0)
free ((*otspec)->features[0]);
if ((*otspec)->nfeatures[1] > 0)
free ((*otspec)->features[1]);
free (*otspec);
*otspec = NULL;
}
finish:
if (langset) FcLangSetDestroy (langset);
if (charset && fc_charset_idx < 0) FcCharSetDestroy (charset);
return pattern;
}
Lisp_Object
ftfont_list (struct frame *f, Lisp_Object spec)
{
Lisp_Object val = Qnil, family, adstyle;
int i;
FcPattern *pattern;
FcFontSet *fontset = NULL;
FcObjectSet *objset = NULL;
FcCharSet *charset;
Lisp_Object chars = Qnil;
char otlayout[15]; /* For "otlayout:XXXX" */
struct OpenTypeSpec *otspec = NULL;
int spacing = -1;
const char *langname = NULL;
if (! fc_initialized)
{
FcInit ();
fc_initialized = 1;
}
pattern = ftfont_spec_pattern (spec, otlayout, &otspec, &langname);
if (! pattern)
return Qnil;
if (FcPatternGetCharSet (pattern, FC_CHARSET, 0, &charset) != FcResultMatch)
{
val = assq_no_quit (QCscript, AREF (spec, FONT_EXTRA_INDEX));
if (! NILP (val))
{
val = assq_no_quit (XCDR (val), Vscript_representative_chars);
if (CONSP (val) && VECTORP (XCDR (val)))
chars = XCDR (val);
}
val = Qnil;
}
if (FIXNUMP (AREF (spec, FONT_SPACING_INDEX)))
spacing = XFIXNUM (AREF (spec, FONT_SPACING_INDEX));
family = AREF (spec, FONT_FAMILY_INDEX);
if (! NILP (family))
{
Lisp_Object resolved;
resolved = ftfont_resolve_generic_family (family, pattern);
if (! NILP (resolved))
{
FcPatternDel (pattern, FC_FAMILY);
if (! FcPatternAddString (pattern, FC_FAMILY,
SYMBOL_FcChar8 (resolved)))
goto err;
}
}
adstyle = AREF (spec, FONT_ADSTYLE_INDEX);
if (! NILP (adstyle) && SBYTES (SYMBOL_NAME (adstyle)) == 0)
adstyle = Qnil;
objset = FcObjectSetBuild (FC_FOUNDRY, FC_FAMILY, FC_WEIGHT, FC_SLANT,
FC_WIDTH, FC_PIXEL_SIZE, FC_SPACING, FC_SCALABLE,
FC_STYLE, FC_FILE, FC_INDEX,
#ifdef FC_CAPABILITY
FC_CAPABILITY,
#endif /* FC_CAPABILITY */
#ifdef FC_FONTFORMAT
FC_FONTFORMAT,
#endif
NULL);
if (! objset)
goto err;
if (! NILP (chars))
FcObjectSetAdd (objset, FC_CHARSET);
fontset = FcFontList (NULL, pattern, objset);
if (! fontset || fontset->nfont == 0)
goto finish;
#if 0
/* Need fix because this finds any fonts. */
if (fontset->nfont == 0 && ! NILP (family))
{
/* Try matching with configuration. For instance, the
configuration may specify "Nimbus Mono L" as an alias of
"Courier". */
FcPattern *pat = FcPatternBuild (0, FC_FAMILY, FcTypeString,
SYMBOL_FcChar8 (family), NULL);
FcChar8 *fam;
if (FcConfigSubstitute (NULL, pat, FcMatchPattern) == FcTrue)
{
for (i = 0;
FcPatternGetString (pat, FC_FAMILY, i, &fam) == FcResultMatch;
i++)
{
FcPatternDel (pattern, FC_FAMILY);
FcPatternAddString (pattern, FC_FAMILY, fam);
FcFontSetDestroy (fontset);
fontset = FcFontList (NULL, pattern, objset);
if (fontset && fontset->nfont > 0)
break;
}
}
}
#endif
for (i = 0; i < fontset->nfont; i++)
{
Lisp_Object entity;
if (spacing >= 0)
{
int this;
if ((FcPatternGetInteger (fontset->fonts[i], FC_SPACING, 0, &this)
== FcResultMatch)
&& spacing != this)
continue;
}
#ifdef FC_CAPABILITY
if (otlayout[0])
{
FcChar8 *this;
if (FcPatternGetString (fontset->fonts[i], FC_CAPABILITY, 0, &this)
!= FcResultMatch
|| ! strstr ((char *) this, otlayout))
continue;
}
#endif /* FC_CAPABILITY */
#ifdef HAVE_LIBOTF
if (otspec)
{
FcChar8 *file;
bool passed;
OTF *otf;
if (FcPatternGetString (fontset->fonts[i], FC_FILE, 0, &file)
!= FcResultMatch)
continue;
otf = OTF_open ((char *) file);
if (! otf)
continue;
passed = (OTF_check_features (otf, 1, otspec->script_tag,
otspec->langsys_tag,
otspec->features[0],
otspec->nfeatures[0]) == 1
&& OTF_check_features (otf, 0, otspec->script_tag,
otspec->langsys_tag,
otspec->features[1],
otspec->nfeatures[1]) == 1);
OTF_close (otf);
if (!passed)
continue;
}
#endif /* HAVE_LIBOTF */
if (VECTORP (chars))
{
ptrdiff_t j;
if (FcPatternGetCharSet (fontset->fonts[i], FC_CHARSET, 0, &charset)
!= FcResultMatch)
continue;
for (j = 0; j < ASIZE (chars); j++)
if (TYPE_RANGED_FIXNUMP (FcChar32, AREF (chars, j))
&& FcCharSetHasChar (charset, XFIXNAT (AREF (chars, j))))
break;
if (j == ASIZE (chars))
continue;
}
if (! NILP (adstyle) || langname)
{
Lisp_Object this_adstyle = get_adstyle_property (fontset->fonts[i]);
if (! NILP (adstyle)
&& (NILP (this_adstyle)
|| xstrcasecmp (SSDATA (SYMBOL_NAME (adstyle)),
SSDATA (SYMBOL_NAME (this_adstyle))) != 0))
continue;
if (langname
&& ! NILP (this_adstyle)
&& xstrcasecmp (langname, SSDATA (SYMBOL_NAME (this_adstyle))))
continue;
}
entity = ftfont_pattern_entity (fontset->fonts[i],
AREF (spec, FONT_EXTRA_INDEX));
if (! NILP (entity))
val = Fcons (entity, val);
}
val = Fnreverse (val);
goto finish;
err:
/* We come here because of unexpected error in fontconfig API call
(usually insufficient memory). */
val = Qnil;
finish:
FONT_ADD_LOG ("ftfont-list", spec, val);
if (objset) FcObjectSetDestroy (objset);
if (fontset) FcFontSetDestroy (fontset);
if (pattern) FcPatternDestroy (pattern);
return val;
}
Lisp_Object
ftfont_match (struct frame *f, Lisp_Object spec)
{
Lisp_Object entity = Qnil;
FcPattern *pattern, *match = NULL;
FcResult result;
char otlayout[15]; /* For "otlayout:XXXX" */
struct OpenTypeSpec *otspec = NULL;
const char *langname = NULL;
if (! fc_initialized)
{
FcInit ();
fc_initialized = 1;
}
pattern = ftfont_spec_pattern (spec, otlayout, &otspec, &langname);
if (! pattern)
return Qnil;
if (FIXNUMP (AREF (spec, FONT_SIZE_INDEX)))
{
FcValue value;
value.type = FcTypeDouble;
value.u.d = XFIXNUM (AREF (spec, FONT_SIZE_INDEX));
FcPatternAdd (pattern, FC_PIXEL_SIZE, value, FcFalse);
}
if (FcConfigSubstitute (NULL, pattern, FcMatchPattern) == FcTrue)
{
FcDefaultSubstitute (pattern);
match = FcFontMatch (NULL, pattern, &result);
if (match)
{
entity = ftfont_pattern_entity (match, AREF (spec, FONT_EXTRA_INDEX));
FcPatternDestroy (match);
if (! NILP (AREF (spec, FONT_FAMILY_INDEX))
&& NILP (assq_no_quit (AREF (spec, FONT_FAMILY_INDEX),
ftfont_generic_family_list))
&& NILP (Fstring_equal (AREF (spec, FONT_FAMILY_INDEX),
AREF (entity, FONT_FAMILY_INDEX))))
entity = Qnil;
}
}
FcPatternDestroy (pattern);
FONT_ADD_LOG ("ftfont-match", spec, entity);
return entity;
}
Lisp_Object
ftfont_list_family (struct frame *f)
{
Lisp_Object list = Qnil;
FcPattern *pattern = NULL;
FcFontSet *fontset = NULL;
FcObjectSet *objset = NULL;
int i;
if (! fc_initialized)
{
FcInit ();
fc_initialized = 1;
}
pattern = FcPatternCreate ();
if (! pattern)
goto finish;
objset = FcObjectSetBuild (FC_FAMILY, NULL);
if (! objset)
goto finish;
fontset = FcFontList (NULL, pattern, objset);
if (! fontset)
goto finish;
for (i = 0; i < fontset->nfont; i++)
{
FcPattern *pat = fontset->fonts[i];
FcChar8 *str;
if (FcPatternGetString (pat, FC_FAMILY, 0, &str) == FcResultMatch)
list = Fcons (intern ((char *) str), list);
}
finish:
if (objset) FcObjectSetDestroy (objset);
if (fontset) FcFontSetDestroy (fontset);
if (pattern) FcPatternDestroy (pattern);
return list;
}
Lisp_Object
ftfont_open2 (struct frame *f,
Lisp_Object entity,
int pixel_size,
Lisp_Object font_object)
{
struct ftfont_info *ftfont_info;
struct font *font;
struct ftfont_cache_data *cache_data;
FT_Face ft_face;
FT_Size ft_size;
FT_UInt size;
Lisp_Object val, filename, idx, cache;
bool scalable;
int spacing;
int i;
double upEM;
val = assq_no_quit (QCfont_entity, AREF (entity, FONT_EXTRA_INDEX));
if (! CONSP (val))
return Qnil;
val = XCDR (val);
cache = ftfont_lookup_cache (entity, FTFONT_CACHE_FOR_FACE);
if (NILP (cache))
return Qnil;
filename = XCAR (val);
idx = XCDR (val);
val = XCDR (cache);
cache_data = xmint_pointer (XCDR (cache));
ft_face = cache_data->ft_face;
if (cache_data->face_refcount > 0)
{
/* FT_Face in this cache is already used by the different size. */
if (FT_New_Size (ft_face, &ft_size) != 0)
return Qnil;
if (FT_Activate_Size (ft_size) != 0)
{
FT_Done_Size (ft_size);
return Qnil;
}
}
size = XFIXNUM (AREF (entity, FONT_SIZE_INDEX));
if (size == 0)
size = pixel_size;
if (FT_Set_Pixel_Sizes (ft_face, size, size) != 0)
{
if (cache_data->face_refcount == 0)
{
FT_Done_Face (ft_face);
cache_data->ft_face = NULL;
}
return Qnil;
}
cache_data->face_refcount++;
ASET (font_object, FONT_FILE_INDEX, filename);
font = XFONT_OBJECT (font_object);
ftfont_info = (struct ftfont_info *) font;
ftfont_info->ft_size = ft_face->size;
ftfont_info->index = XFIXNUM (idx);
#ifdef HAVE_LIBOTF
ftfont_info->maybe_otf = (ft_face->face_flags & FT_FACE_FLAG_SFNT) != 0;
ftfont_info->otf = NULL;
#endif /* HAVE_LIBOTF */
#ifdef HAVE_HARFBUZZ
ftfont_info->hb_font = NULL;
#endif /* HAVE_HARFBUZZ */
/* This means that there's no need of transformation. */
ftfont_info->matrix.xx = 0;
font->pixel_size = size;
font->driver = &ftfont_driver;
font->encoding_charset = font->repertory_charset = -1;
upEM = ft_face->units_per_EM;
scalable = (FIXNUMP (AREF (entity, FONT_AVGWIDTH_INDEX))
&& XFIXNUM (AREF (entity, FONT_AVGWIDTH_INDEX)) == 0);
if (scalable)
{
font->ascent = ft_face->ascender * size / upEM + 0.5;
font->descent = - ft_face->descender * size / upEM + 0.5;
font->height = ft_face->height * size / upEM + 0.5;
}
else
{
font->ascent = ft_face->size->metrics.ascender >> 6;
font->descent = - ft_face->size->metrics.descender >> 6;
font->height = ft_face->size->metrics.height >> 6;
}
if (FIXNUMP (AREF (entity, FONT_SPACING_INDEX)))
spacing = XFIXNUM (AREF (entity, FONT_SPACING_INDEX));
else
spacing = FC_PROPORTIONAL;
if (spacing != FC_PROPORTIONAL
#ifdef FC_DUAL
&& spacing != FC_DUAL
#endif /* FC_DUAL */
)
font->min_width = font->average_width = font->space_width
= (scalable ? ft_face->max_advance_width * size / upEM + 0.5
: ft_face->size->metrics.max_advance >> 6);
else
{
int n;
font->min_width = font->average_width = font->space_width = 0;
for (i = 32, n = 0; i < 127; i++)
if (FT_Load_Char (ft_face, i, FT_LOAD_DEFAULT) == 0)
{
int this_width = ft_face->glyph->metrics.horiAdvance >> 6;
if (this_width > 0
&& (! font->min_width || font->min_width > this_width))
font->min_width = this_width;
if (i == 32)
font->space_width = this_width;
font->average_width += this_width;
n++;
}
if (n > 0)
font->average_width /= n;
}
font->baseline_offset = 0;
font->relative_compose = 0;
font->default_ascent = 0;
font->vertical_centering = 0;
if (scalable)
{
font->underline_position = (-ft_face->underline_position * size / upEM
+ 0.5);
font->underline_thickness = (ft_face->underline_thickness * size / upEM
+ 0.5);
}
else
{
font->underline_position = -1;
font->underline_thickness = 0;
}
return font_object;
}
Lisp_Object
ftfont_open (struct frame *f, Lisp_Object entity, int pixel_size)
{
Lisp_Object font_object;
FT_UInt size;
size = XFIXNUM (AREF (entity, FONT_SIZE_INDEX));
if (size == 0)
size = pixel_size;
font_object = font_build_object (VECSIZE (struct ftfont_info),
Qfreetype, entity, size);
return ftfont_open2 (f, entity, pixel_size, font_object);
}
void
ftfont_close (struct font *font)
{
if (font_data_structures_may_be_ill_formed ())
return;
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
Lisp_Object val, cache;
val = Fcons (font->props[FONT_FILE_INDEX], make_fixnum (ftfont_info->index));
cache = ftfont_lookup_cache (val, FTFONT_CACHE_FOR_FACE);
eassert (CONSP (cache));
val = XCDR (cache);
struct ftfont_cache_data *cache_data = xmint_pointer (val);
cache_data->face_refcount--;
if (cache_data->face_refcount == 0)
{
FT_Done_Face (cache_data->ft_face);
#ifdef HAVE_LIBOTF
if (ftfont_info->otf)
OTF_close (ftfont_info->otf);
#endif
#ifdef HAVE_HARFBUZZ
if (ftfont_info->hb_font)
hb_font_destroy (ftfont_info->hb_font);
#endif
cache_data->ft_face = NULL;
}
else
FT_Done_Size (ftfont_info->ft_size);
}
int
ftfont_has_char (Lisp_Object font, int c)
{
struct charset *cs = NULL;
if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qja)
&& charset_jisx0208 >= 0)
cs = CHARSET_FROM_ID (charset_jisx0208);
else if (EQ (AREF (font, FONT_ADSTYLE_INDEX), Qko)
&& charset_ksc5601 >= 0)
cs = CHARSET_FROM_ID (charset_ksc5601);
if (cs)
return (ENCODE_CHAR (cs, c) != CHARSET_INVALID_CODE (cs));
if (FONT_ENTITY_P (font))
{
FcCharSet *charset = ftfont_get_fc_charset (font);
return (FcCharSetHasChar (charset, c) == FcTrue);
}
else
{
struct ftfont_info *ftfont_info;
ftfont_info = (struct ftfont_info *) XFONT_OBJECT (font);
return (FT_Get_Char_Index (ftfont_info->ft_size->face, (FT_ULong) c)
!= 0);
}
}
unsigned
ftfont_encode_char (struct font *font, int c)
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
FT_ULong charcode = c;
FT_UInt code = FT_Get_Char_Index (ft_face, charcode);
return (code > 0 ? code : FONT_INVALID_CODE);
}
static bool
ftfont_glyph_metrics (FT_Face ft_face, int c, int *advance, int *lbearing,
int *rbearing, int *ascent, int *descent)
{
if (FT_Load_Glyph (ft_face, c, FT_LOAD_DEFAULT) == 0)
{
FT_Glyph_Metrics *m = &ft_face->glyph->metrics;
*advance = m->horiAdvance >> 6;
*lbearing = m->horiBearingX >> 6;
*rbearing = (m->horiBearingX + m->width) >> 6;
*ascent = m->horiBearingY >> 6;
*descent = (m->height - m->horiBearingY) >> 6;
return true;
}
return false;
}
void
ftfont_text_extents (struct font *font, unsigned int *code,
int nglyphs, struct font_metrics *metrics)
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
int i, width = 0;
bool first;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
for (i = 0, first = 1; i < nglyphs; i++)
{
int advance, lbearing, rbearing, ascent, descent;
if (ftfont_glyph_metrics (ft_face, code[i], &advance, &lbearing,
&rbearing, &ascent, &descent))
{
if (first)
{
metrics->lbearing = lbearing;
metrics->rbearing = rbearing;
metrics->ascent = ascent;
metrics->descent = descent;
first = 0;
}
if (metrics->lbearing > width + lbearing)
metrics->lbearing = width + lbearing;
if (metrics->rbearing < width + rbearing)
metrics->rbearing = width + rbearing;
if (metrics->ascent < ascent)
metrics->ascent = ascent;
if (metrics->descent > descent)
metrics->descent = descent;
width += advance;
}
else
width += font->space_width;
}
metrics->width = width;
}
int
ftfont_get_bitmap (struct font *font, unsigned int code, struct font_bitmap *bitmap, int bits_per_pixel)
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
FT_Int32 load_flags = FT_LOAD_RENDER;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
if (bits_per_pixel == 1)
{
#ifdef FT_LOAD_TARGET_MONO
load_flags |= FT_LOAD_TARGET_MONO;
#else
load_flags |= FT_LOAD_MONOCHROME;
#endif
}
else if (bits_per_pixel != 8)
/* We don't support such a rendering. */
return -1;
if (FT_Load_Glyph (ft_face, code, load_flags) != 0)
return -1;
bitmap->bits_per_pixel
= (ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 1
: ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_GRAY ? 8
: ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD ? 8
: ft_face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_LCD_V ? 8
: -1);
if (bitmap->bits_per_pixel < 0)
/* We don't support that kind of pixel mode. */
return -1;
bitmap->rows = ft_face->glyph->bitmap.rows;
bitmap->width = ft_face->glyph->bitmap.width;
bitmap->pitch = ft_face->glyph->bitmap.pitch;
bitmap->buffer = ft_face->glyph->bitmap.buffer;
bitmap->left = ft_face->glyph->bitmap_left;
bitmap->top = ft_face->glyph->bitmap_top;
bitmap->advance = ft_face->glyph->metrics.horiAdvance >> 6;
return 0;
}
int
ftfont_anchor_point (struct font *font, unsigned int code, int idx,
int *x, int *y)
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
FT_Face ft_face = ftfont_info->ft_size->face;
if (ftfont_info->ft_size != ft_face->size)
FT_Activate_Size (ftfont_info->ft_size);
if (FT_Load_Glyph (ft_face, code, FT_LOAD_DEFAULT) != 0)
return -1;
if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
return -1;
if (idx >= ft_face->glyph->outline.n_points)
return -1;
*x = ft_face->glyph->outline.points[idx].x;
*y = ft_face->glyph->outline.points[idx].y;
return 0;
}
#ifdef HAVE_LIBOTF
static Lisp_Object
ftfont_otf_features (OTF_GSUB_GPOS *gsub_gpos)
{
Lisp_Object scripts, langsyses, features, sym;
int i, j, k, l;
for (scripts = Qnil, i = gsub_gpos->ScriptList.ScriptCount - 1; i >= 0; i--)
{
OTF_Script *otf_script = gsub_gpos->ScriptList.Script + i;
for (langsyses = Qnil, j = otf_script->LangSysCount - 1; j >= -1; j--)
{
OTF_LangSys *otf_langsys;
if (j >= 0)
otf_langsys = otf_script->LangSys + j;
else if (otf_script->DefaultLangSysOffset)
otf_langsys = &otf_script->DefaultLangSys;
else
break;
for (features = Qnil, k = otf_langsys->FeatureCount - 1; k >= 0; k--)
{
l = otf_langsys->FeatureIndex[k];
if (l >= gsub_gpos->FeatureList.FeatureCount)
continue;
OTF_TAG_SYM (sym, gsub_gpos->FeatureList.Feature[l].FeatureTag);
features = Fcons (sym, features);
}
if (j >= 0)
OTF_TAG_SYM (sym, otf_script->LangSysRecord[j].LangSysTag);
else
sym = Qnil;
langsyses = Fcons (Fcons (sym, features), langsyses);
}
OTF_TAG_SYM (sym, gsub_gpos->ScriptList.Script[i].ScriptTag);
scripts = Fcons (Fcons (sym, langsyses), scripts);
}
return scripts;
}
Lisp_Object
ftfont_otf_capability (struct font *font)
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
OTF *otf = ftfont_get_otf (ftfont_info);
Lisp_Object gsub_gpos;
if (! otf)
return Qnil;
gsub_gpos = Fcons (Qnil, Qnil);
if (OTF_get_table (otf, "GSUB") == 0
&& otf->gsub->FeatureList.FeatureCount > 0)
XSETCAR (gsub_gpos, ftfont_otf_features (otf->gsub));
if (OTF_get_table (otf, "GPOS") == 0
&& otf->gpos->FeatureList.FeatureCount > 0)
XSETCDR (gsub_gpos, ftfont_otf_features (otf->gpos));
return gsub_gpos;
}
#ifdef HAVE_M17N_FLT
#if (((LIBOTF_MAJOR_VERSION > 1) || (LIBOTF_RELEASE_NUMBER >= 10)) \
&& ((M17NLIB_MAJOR_VERSION > 1) || (M17NLIB_MINOR_VERSION >= 6)))
/* We can use the new feature of libotf and m17n-flt to handle the
character encoding scheme introduced in Unicode 5.1 and 5.2 for
some Agian scripts. */
#define M17N_FLT_USE_NEW_FEATURE
#endif
struct MFLTFontFT
{
MFLTFont flt_font;
struct font *font;
FT_Face ft_face;
OTF *otf;
FT_Matrix *matrix;
};
/* The actual type of elements in the array MFLTGlyphString.glyphs.
We use this structure instead of MFLTGlyph to utilize the new
feature of libotf ver.0.9.15 which requires saving and restoring
the value of OTF_GlyphString.positioning_type in the succeeding
calls of the callback function MFLTFont.drive_otf (which is set to
ftfont_drive_otf). */
typedef struct {
MFLTGlyph g;
unsigned int libotf_positioning_type;
} MFLTGlyphFT;
static int
ftfont_get_glyph_id (MFLTFont *font, MFLTGlyphString *gstring,
int from, int to)
{
struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
FT_Face ft_face = flt_font_ft->ft_face;
MFLTGlyphFT *g;
for (g = (MFLTGlyphFT *) (gstring->glyphs) + from; from < to; g++, from++)
if (! g->g.encoded)
{
FT_UInt code = FT_Get_Char_Index (ft_face, g->g.code);
g->g.code = code > 0 ? code : FONT_INVALID_CODE;
g->g.encoded = 1;
}
return 0;
}
/* Operators for 26.6 fixed fractional pixel format */
#define FLOOR(x) ((x) & -64)
#define CEIL(x) (((x)+63) & -64)
#define ROUND(x) (((x)+32) & -64)
static int
ftfont_get_metrics (MFLTFont *font, MFLTGlyphString *gstring,
int from, int to)
{
struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
FT_Face ft_face = flt_font_ft->ft_face;
MFLTGlyphFT *g;
for (g = (MFLTGlyphFT *) (gstring->glyphs) + from; from < to; g++, from++)
if (! g->g.measured)
{
if (g->g.code != FONT_INVALID_CODE)
{
FT_Glyph_Metrics *m;
if (FT_Load_Glyph (ft_face, g->g.code, FT_LOAD_DEFAULT) != 0
&& FT_Load_Glyph (ft_face, g->g.code, FT_LOAD_NO_HINTING) != 0)
emacs_abort ();
m = &ft_face->glyph->metrics;
if (flt_font_ft->matrix)
{
FT_Vector v[4];
int i;
v[0].x = v[1].x = m->horiBearingX;
v[2].x = v[3].x = m->horiBearingX + m->width;
v[0].y = v[2].y = m->horiBearingY;
v[1].y = v[3].y = m->horiBearingY - m->height;
for (i = 0; i < 4; i++)
FT_Vector_Transform (v + i, flt_font_ft->matrix);
g->g.lbearing = v[0].x < v[1].x ? FLOOR (v[0].x) : FLOOR (v[1].x);
g->g.rbearing = v[2].x > v[3].x ? CEIL (v[2].x) : CEIL (v[3].x);
g->g.ascent = v[0].y > v[2].y ? CEIL (v[0].y) : CEIL (v[2].y);
g->g.descent = v[1].y < v[3].y ? - FLOOR (v[1].y) : - FLOOR (v[3].y);
}
else
{
g->g.lbearing = FLOOR (m->horiBearingX);
g->g.rbearing = CEIL (m->horiBearingX + m->width);
g->g.ascent = CEIL (m->horiBearingY);
g->g.descent = - FLOOR (m->horiBearingY - m->height);
}
g->g.xadv = ROUND (ft_face->glyph->advance.x);
}
else
{
g->g.lbearing = 0;
g->g.rbearing = g->g.xadv = flt_font_ft->font->space_width << 6;
g->g.ascent = flt_font_ft->font->ascent << 6;
g->g.descent = flt_font_ft->font->descent << 6;
}
g->g.yadv = 0;
g->g.measured = 1;
}
return 0;
}
static int
ftfont_check_otf (MFLTFont *font, MFLTOtfSpec *spec)
{
#define FEATURE_NONE(IDX) (! spec->features[IDX])
#define FEATURE_ANY(IDX) \
(spec->features[IDX] \
&& spec->features[IDX][0] == 0xFFFFFFFF && spec->features[IDX][1] == 0)
struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
OTF *otf = flt_font_ft->otf;
OTF_Tag *tags;
int i, n;
bool negative;
if (FEATURE_ANY (0) && FEATURE_ANY (1))
/* Return true iff any of GSUB or GPOS support the script (and
language). */
return (otf
&& (OTF_check_features (otf, 0, spec->script, spec->langsys,
NULL, 0) > 0
|| OTF_check_features (otf, 1, spec->script, spec->langsys,
NULL, 0) > 0));
for (i = 0; i < 2; i++)
if (! FEATURE_ANY (i))
{
if (FEATURE_NONE (i))
{
if (otf
&& OTF_check_features (otf, i == 0, spec->script, spec->langsys,
NULL, 0) > 0)
return 0;
continue;
}
if (spec->features[i][0] == 0xFFFFFFFF)
{
if (! otf
|| OTF_check_features (otf, i == 0, spec->script, spec->langsys,
NULL, 0) <= 0)
continue;
}
else if (! otf)
return 0;
for (n = 1; spec->features[i][n]; n++);
USE_SAFE_ALLOCA;
SAFE_NALLOCA (tags, 1, n);
for (n = 0, negative = 0; spec->features[i][n]; n++)
{
if (spec->features[i][n] == 0xFFFFFFFF)
negative = 1;
else if (negative)
tags[n - 1] = spec->features[i][n] | 0x80000000;
else
tags[n] = spec->features[i][n];
}
bool passed = true;
#ifndef M17N_FLT_USE_NEW_FEATURE
passed = n - negative > 0;
#endif
if (passed)
passed = (OTF_check_features (otf, i == 0, spec->script,
spec->langsys, tags, n - negative)
!= 1);
SAFE_FREE ();
if (passed)
return 0;
}
return 1;
#undef FEATURE_NONE
#undef FEATURE_ANY
}
#define DEVICE_DELTA(table, size) \
(((size) >= (table).StartSize && (size) <= (table).EndSize) \
? (table).DeltaValue[(size) - (table).StartSize] << 6 \
: 0)
static void
adjust_anchor (FT_Face ft_face, OTF_Anchor *anchor,
unsigned code, int x_ppem, int y_ppem, int *x, int *y)
{
if (anchor->AnchorFormat == 2)
{
FT_Outline *outline;
int ap = anchor->f.f1.AnchorPoint;
FT_Load_Glyph (ft_face, (FT_UInt) code, FT_LOAD_MONOCHROME);
outline = &ft_face->glyph->outline;
if (ap < outline->n_points)
{
*x = outline->points[ap].x << 6;
*y = outline->points[ap].y << 6;
}
}
else if (anchor->AnchorFormat == 3)
{
if (anchor->f.f2.XDeviceTable.offset
&& anchor->f.f2.XDeviceTable.DeltaValue)
*x += DEVICE_DELTA (anchor->f.f2.XDeviceTable, x_ppem);
if (anchor->f.f2.YDeviceTable.offset
&& anchor->f.f2.YDeviceTable.DeltaValue)
*y += DEVICE_DELTA (anchor->f.f2.YDeviceTable, y_ppem);
}
}
static OTF_GlyphString otf_gstring;
static void
setup_otf_gstring (int size)
{
if (otf_gstring.size < size)
{
ptrdiff_t new_size = otf_gstring.size;
xfree (otf_gstring.glyphs);
otf_gstring.glyphs = xpalloc (NULL, &new_size, size - otf_gstring.size,
INT_MAX, sizeof *otf_gstring.glyphs);
otf_gstring.size = new_size;
}
otf_gstring.used = size;
memset (otf_gstring.glyphs, 0, sizeof (OTF_Glyph) * size);
}
#ifdef M17N_FLT_USE_NEW_FEATURE
/* Pack 32-bit OTF tag (0x7F7F7F7F) into 28-bit (0x0FFFFFFF). */
#define PACK_OTF_TAG(TAG) \
((((TAG) & 0x7F000000) >> 3) \
| (((TAG) & 0x7F0000) >> 2) \
| (((TAG) & 0x7F00) >> 1) \
| ((TAG) & 0x7F))
/* Assuming that FONT is an OpenType font, apply OpenType features
specified in SPEC on glyphs between FROM and TO of IN, and record
the lastly applied feature in each glyph of IN. If OUT is not
NULL, append the resulting glyphs to OUT while storing glyph
position adjustment information in ADJUSTMENT. */
static int
ftfont_drive_otf (MFLTFont *font,
MFLTOtfSpec *spec,
MFLTGlyphString *in,
int from,
int to,
MFLTGlyphString *out,
MFLTGlyphAdjustment *adjustment)
{
struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
MFLTGlyphFT *in_glyphs = (MFLTGlyphFT *) (in->glyphs) + from;
MFLTGlyphFT *out_glyphs = out ? (MFLTGlyphFT *) (out->glyphs) : NULL;
FT_Face ft_face = flt_font_ft->ft_face;
OTF *otf = flt_font_ft->otf;
int len = to - from;
int i, j, gidx;
OTF_Glyph *otfg;
char script[5], *langsys = NULL;
char *gsub_features = NULL, *gpos_features = NULL;
OTF_Feature *features;
if (len == 0)
return from;
OTF_tag_name (spec->script, script);
char langsysbuf[5];
if (spec->langsys)
{
langsys = langsysbuf;
OTF_tag_name (spec->langsys, langsys);
}
USE_SAFE_ALLOCA;
for (i = 0; i < 2; i++)
{
char *p;
if (spec->features[i] && spec->features[i][1] != 0xFFFFFFFF)
{
for (j = 0; spec->features[i][j]; j++);
SAFE_NALLOCA (p, 6, j);
if (i == 0)
gsub_features = p;
else
gpos_features = p;
for (j = 0; spec->features[i][j]; j++)
{
if (spec->features[i][j] == 0xFFFFFFFF)
*p++ = '*', *p++ = ',';
else
{
OTF_tag_name (spec->features[i][j], p);
p[4] = ',';
p += 5;
}
}
*--p = '\0';
}
}
setup_otf_gstring (len);
for (i = 0; i < len; i++)
{
otf_gstring.glyphs[i].c = in_glyphs[i].g.c & 0x11FFFF;
otf_gstring.glyphs[i].glyph_id = in_glyphs[i].g.code;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
otf_gstring.glyphs[i].positioning_type = in_glyphs[i].libotf_positioning_type;
#endif
}
OTF_drive_gdef (otf, &otf_gstring);
gidx = out ? out->used : from;
if (gsub_features && out)
{
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
if (OTF_drive_gsub_features (otf, &otf_gstring, script, langsys,
gsub_features) < 0)
goto simple_copy;
#else
if (OTF_drive_gsub_with_log (otf, &otf_gstring, script, langsys,
gsub_features) < 0)
goto simple_copy;
#endif
if (out->allocated < out->used + otf_gstring.used)
{
SAFE_FREE ();
return -2;
}
features = otf->gsub->FeatureList.Feature;
for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used; )
{
MFLTGlyphFT *g;
int min_from, max_to;
int feature_idx;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
feature_idx = OTF_POSITIONING_TYPE_GET_FEATURE (otfg);
#else
feature_idx = otfg->positioning_type >> 4;
#endif
g = out_glyphs + out->used;
*g = in_glyphs[otfg->f.index.from];
if (g->g.code != otfg->glyph_id)
{
g->g.c = 0;
g->g.code = otfg->glyph_id;
g->g.measured = 0;
}
out->used++;
min_from = g->g.from;
max_to = g->g.to;
if (otfg->f.index.from < otfg->f.index.to)
{
/* OTFG substitutes multiple glyphs in IN. */
for (j = otfg->f.index.from + 1; j <= otfg->f.index.to; j++)
{
if (min_from > in_glyphs[j].g.from)
min_from = in_glyphs[j].g.from;
if (max_to < in_glyphs[j].g.to)
max_to = in_glyphs[j].g.to;
}
g->g.from = min_from;
g->g.to = max_to;
}
if (feature_idx)
{
unsigned int tag = features[feature_idx - 1].FeatureTag;
tag = PACK_OTF_TAG (tag);
g->g.internal = (g->g.internal & ~0x1FFFFFFF) | tag;
}
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
g->libotf_positioning_type
= otfg->positioning_type & OTF_positioning_type_components_mask;
#endif
for (i++, otfg++; (i < otf_gstring.used
&& otfg->f.index.from == otfg[-1].f.index.from);
i++, otfg++)
{
g = out_glyphs + out->used;
*g = in_glyphs[otfg->f.index.to];
if (g->g.code != otfg->glyph_id)
{
g->g.c = 0;
g->g.code = otfg->glyph_id;
g->g.measured = 0;
}
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
feature_idx = OTF_POSITIONING_TYPE_GET_FEATURE (otfg);
#else
feature_idx = otfg->positioning_type >> 4;
#endif
if (feature_idx)
{
unsigned int tag = features[feature_idx - 1].FeatureTag;
tag = PACK_OTF_TAG (tag);
g->g.internal = (g->g.internal & ~0x1FFFFFFF) | tag;
}
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
g->libotf_positioning_type
= otfg->positioning_type & OTF_positioning_type_components_mask;
#endif
out->used++;
}
}
}
else if (gsub_features)
{
/* Just for checking which features will be applied. */
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
if (OTF_drive_gsub_features (otf, &otf_gstring, script, langsys,
gsub_features) < 0)
goto simple_copy;
#else
if (OTF_drive_gsub_with_log (otf, &otf_gstring, script, langsys,
gsub_features) < 0)
goto simple_copy;
#endif
features = otf->gsub->FeatureList.Feature;
for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used; i++,
otfg++)
{
int feature_idx;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
feature_idx = OTF_POSITIONING_TYPE_GET_FEATURE (otfg);
#else
feature_idx = otfg->positioning_type >> 4;
#endif
if (feature_idx)
{
unsigned int tag = features[feature_idx - 1].FeatureTag;
tag = PACK_OTF_TAG (tag);
for (j = otfg->f.index.from; j <= otfg->f.index.to; j++)
{
MFLTGlyphFT *g = in_glyphs + j;
g->g.internal = (g->g.internal & ~0x1FFFFFFF) | tag;
}
}
}
}
else if (out)
{
if (out->allocated < out->used + len)
{
SAFE_FREE ();
return -2;
}
for (i = 0; i < len; i++)
out_glyphs[out->used++] = in_glyphs[i];
}
if (gpos_features && out)
{
MFLTGlyphFT *base = NULL, *mark = NULL, *g;
int x_ppem, y_ppem, x_scale, y_scale;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
if (OTF_drive_gpos_features (otf, &otf_gstring, script, langsys,
gpos_features) < 0)
{
SAFE_FREE ();
return to;
}
#else
if (OTF_drive_gpos_with_log (otf, &otf_gstring, script, langsys,
gpos_features) < 0)
{
SAFE_FREE ();
return to;
}
#endif
features = otf->gpos->FeatureList.Feature;
x_ppem = ft_face->size->metrics.x_ppem;
y_ppem = ft_face->size->metrics.y_ppem;
x_scale = ft_face->size->metrics.x_scale;
y_scale = ft_face->size->metrics.y_scale;
for (i = 0, otfg = otf_gstring.glyphs, g = out_glyphs + gidx;
i < otf_gstring.used; i++, otfg++)
{
MFLTGlyphAdjustment *adjust = adjustment;
MFLTGlyphFT *prev;
int positioning_type, feature_idx;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
positioning_type = OTF_POSITIONING_TYPE_GET_FORMAT (otfg);
feature_idx = OTF_POSITIONING_TYPE_GET_FEATURE (otfg);
#else
positioning_type = otfg->positioning_type & 0xF;
feature_idx = otfg->positioning_type >> 4;
#endif
if (feature_idx)
{
unsigned int tag = features[feature_idx - 1].FeatureTag;
tag = PACK_OTF_TAG (tag);
g->g.internal = (g->g.internal & ~0x1FFFFFFF) | tag;
}
if (! otfg->glyph_id)
/* This is a pseudo glyph that contains positioning
information to be accumulated to a real glyph. */
adjust--;
switch (positioning_type)
{
case 0:
break;
case 1: /* Single */
case 2: /* Pair */
{
int format = otfg->f.f1.format;
if (format & OTF_XPlacement)
adjust->xoff
= otfg->f.f1.value->XPlacement * x_scale / 0x10000;
if (format & OTF_XPlaDevice)
adjust->xoff
+= DEVICE_DELTA (otfg->f.f1.value->XPlaDevice, x_ppem);
if (format & OTF_YPlacement)
adjust->yoff
= - (otfg->f.f1.value->YPlacement * y_scale / 0x10000);
if (format & OTF_YPlaDevice)
adjust->yoff
-= DEVICE_DELTA (otfg->f.f1.value->YPlaDevice, y_ppem);
if (format & OTF_XAdvance)
adjust->xadv
+= otfg->f.f1.value->XAdvance * x_scale / 0x10000;
if (format & OTF_XAdvDevice)
adjust->xadv
+= DEVICE_DELTA (otfg->f.f1.value->XAdvDevice, x_ppem);
if (format & OTF_YAdvance)
adjust->yadv
+= otfg->f.f1.value->YAdvance * y_scale / 0x10000;
if (format & OTF_YAdvDevice)
adjust->yadv
+= DEVICE_DELTA (otfg->f.f1.value->YAdvDevice, y_ppem);
adjust->set = 1;
}
break;
case 3: /* Cursive */
/* Not yet supported. */
break;
case 4: /* Mark-to-Base */
case 5: /* Mark-to-Ligature */
if (! base)
break;
prev = base;
goto label_adjust_anchor;
default: /* i.e. case 6 Mark-to-Mark */
if (! mark)
break;
prev = mark;
#ifdef OTF_POSITIONING_TYPE_GET_FORMAT
{
int distance = OTF_POSITIONING_TYPE_GET_MARKDISTANCE (otfg);
if (distance > 0)
{
prev = g - distance;
if (prev < out_glyphs)
prev = mark;
}
}
#endif
label_adjust_anchor:
{
int base_x, base_y, mark_x, mark_y;
int this_from, this_to;
base_x = otfg->f.f4.base_anchor->XCoordinate * x_scale / 0x10000;
base_y = otfg->f.f4.base_anchor->YCoordinate * y_scale / 0x10000;
mark_x = otfg->f.f4.mark_anchor->XCoordinate * x_scale / 0x10000;
mark_y = otfg->f.f4.mark_anchor->YCoordinate * y_scale / 0x10000;
if (otfg->f.f4.base_anchor->AnchorFormat != 1)
adjust_anchor (ft_face, otfg->f.f4.base_anchor, prev->g.code,
x_ppem, y_ppem, &base_x, &base_y);
if (otfg->f.f4.mark_anchor->AnchorFormat != 1)
adjust_anchor (ft_face, otfg->f.f4.mark_anchor, g->g.code,
x_ppem, y_ppem, &mark_x, &mark_y);
adjust->xoff = (base_x - mark_x);
adjust->yoff = - (base_y - mark_y);
adjust->back = (g - prev);
adjust->xadv = 0;
adjust->advance_is_absolute = 1;
adjust->set = 1;
this_from = g->g.from;
this_to = g->g.to;
for (j = 0; prev + j < g; j++)
{
if (this_from > prev[j].g.from)
this_from = prev[j].g.from;
if (this_to < prev[j].g.to)
this_to = prev[j].g.to;
}
for (; prev <= g; prev++)
{
prev->g.from = this_from;
prev->g.to = this_to;
}
}
}
if (otfg->glyph_id)
{
if (otfg->GlyphClass == OTF_GlyphClass0)
base = mark = g;
else if (otfg->GlyphClass == OTF_GlyphClassMark)
mark = g;
else
base = g;
g++, adjustment++;
}
}
}
else if (gpos_features)
{
if (OTF_drive_gpos_with_log (otf, &otf_gstring, script, langsys,
gpos_features) < 0)
{
SAFE_FREE ();
return to;
}
features = otf->gpos->FeatureList.Feature;
for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used;
i++, otfg++)
if (otfg->positioning_type & 0xF)
{
int feature_idx = otfg->positioning_type >> 4;
if (feature_idx)
{
unsigned int tag = features[feature_idx - 1].FeatureTag;
tag = PACK_OTF_TAG (tag);
for (j = otfg->f.index.from; j <= otfg->f.index.to; j++)
{
MFLTGlyphFT *g = in_glyphs + j;
g->g.internal = (g->g.internal & ~0x1FFFFFFF) | tag;
}
}
}
}
SAFE_FREE ();
return to;
simple_copy:
SAFE_FREE ();
if (! out)
return to;
if (out->allocated < out->used + len)
return -2;
font->get_metrics (font, in, from, to);
memcpy (out->glyphs + out->used, in_glyphs, sizeof (MFLTGlyphFT) * len);
out->used += len;
return to;
}
static int
ftfont_try_otf (MFLTFont *font, MFLTOtfSpec *spec,
MFLTGlyphString *in, int from, int to)
{
return ftfont_drive_otf (font, spec, in, from, to, NULL, NULL);
}
#else /* not M17N_FLT_USE_NEW_FEATURE */
static int
ftfont_drive_otf (MFLTFont *font, MFLTOtfSpec *spec, MFLTGlyphString *in,
int from, int to,
MFLTGlyphString *out, MFLTGlyphAdjustment *adjustment)
{
struct MFLTFontFT *flt_font_ft = (struct MFLTFontFT *) font;
MFLTGlyphFT *in_glyphs = (MFLTGlyphFT *) (in->glyphs) + from;
MFLTGlyphFT *out_glyphs = out ? (MFLTGlyphFT *) (out->glyphs) : NULL;
FT_Face ft_face = flt_font_ft->ft_face;
OTF *otf = flt_font_ft->otf;
int len = to - from;
int i, j, gidx;
OTF_Glyph *otfg;
char script[5], *langsys = NULL;
char *gsub_features = NULL, *gpos_features = NULL;
if (len == 0)
return from;
OTF_tag_name (spec->script, script);
char langsysbuf[5];
if (spec->langsys)
{
langsys = langsysbuf;
OTF_tag_name (spec->langsys, langsys);
}
USE_SAFE_ALLOCA;
for (i = 0; i < 2; i++)
{
char *p;
if (spec->features[i] && spec->features[i][1] != 0xFFFFFFFF)
{
for (j = 0; spec->features[i][j]; j++);
SAFE_NALLOCA (p, 6, j);
if (i == 0)
gsub_features = p;
else
gpos_features = p;
for (j = 0; spec->features[i][j]; j++)
{
if (spec->features[i][j] == 0xFFFFFFFF)
*p++ = '*', *p++ = ',';
else
{
OTF_tag_name (spec->features[i][j], p);
p[4] = ',';
p += 5;
}
}
*--p = '\0';
}
}
setup_otf_gstring (len);
for (i = 0; i < len; i++)
{
otf_gstring.glyphs[i].c = in_glyphs[i].g.c;
otf_gstring.glyphs[i].glyph_id = in_glyphs[i].g.code;
}
OTF_drive_gdef (otf, &otf_gstring);
gidx = out->used;
if (gsub_features)
{
if (OTF_drive_gsub (otf, &otf_gstring, script, langsys, gsub_features)
< 0)
goto simple_copy;
if (out->allocated < out->used + otf_gstring.used)
{
SAFE_FREE ();
return -2;
}
for (i = 0, otfg = otf_gstring.glyphs; i < otf_gstring.used; )
{
MFLTGlyphFT *g;
int min_from, max_to;
int j;
g = out_glyphs + out->used;
*g = in_glyphs[otfg->f.index.from];
if (g->g.code != otfg->glyph_id)
{
g->g.c = 0;
g->g.code = otfg->glyph_id;
g->g.measured = 0;
}
out->used++;
min_from = g->g.from;
max_to = g->g.to;
if (otfg->f.index.from < otfg->f.index.to)
{
/* OTFG substitutes multiple glyphs in IN. */
for (j = from + otfg->f.index.from + 1;
j <= from + otfg->f.index.to; j++)
{
if (min_from > in->glyphs[j].from)
min_from = in->glyphs[j].from;
if (max_to < in->glyphs[j].to)
max_to = in->glyphs[j].to;
}
g->g.from = min_from;
g->g.to = max_to;
}
for (i++, otfg++; (i < otf_gstring.used
&& otfg->f.index.from == otfg[-1].f.index.from);
i++, otfg++)
{
g = out_glyphs + out->used;
*g = in_glyphs[otfg->f.index.to];
if (g->g.code != otfg->glyph_id)
{
g->g.c = 0;
g->g.code = otfg->glyph_id;
g->g.measured = 0;
}
out->used++;
}
}
}
else
{
if (out->allocated < out->used + len)
{
SAFE_FREE ();
return -2;
}
for (i = 0; i < len; i++)
out_glyphs[out->used++] = in_glyphs[i];
}
if (gpos_features)
{
MFLTGlyphFT *base = NULL, *mark = NULL, *g;
int x_ppem, y_ppem, x_scale, y_scale;
if (OTF_drive_gpos (otf, &otf_gstring, script, langsys, gpos_features)
< 0)
{
SAFE_FREE ();
return to;
}
x_ppem = ft_face->size->metrics.x_ppem;
y_ppem = ft_face->size->metrics.y_ppem;
x_scale = ft_face->size->metrics.x_scale;
y_scale = ft_face->size->metrics.y_scale;
for (i = 0, otfg = otf_gstring.glyphs, g = out_glyphs + gidx;
i < otf_gstring.used; i++, otfg++, g++)
{
MFLTGlyphFT *prev;
if (! otfg->glyph_id)
continue;
switch (otfg->positioning_type)
{
case 0:
break;
case 1: /* Single */
case 2: /* Pair */
{
int format = otfg->f.f1.format;
if (format & OTF_XPlacement)
adjustment[i].xoff
= otfg->f.f1.value->XPlacement * x_scale / 0x10000;
if (format & OTF_XPlaDevice)
adjustment[i].xoff
+= DEVICE_DELTA (otfg->f.f1.value->XPlaDevice, x_ppem);
if (format & OTF_YPlacement)
adjustment[i].yoff
= - (otfg->f.f1.value->YPlacement * y_scale / 0x10000);
if (format & OTF_YPlaDevice)
adjustment[i].yoff
-= DEVICE_DELTA (otfg->f.f1.value->YPlaDevice, y_ppem);
if (format & OTF_XAdvance)
adjustment[i].xadv
+= otfg->f.f1.value->XAdvance * x_scale / 0x10000;
if (format & OTF_XAdvDevice)
adjustment[i].xadv
+= DEVICE_DELTA (otfg->f.f1.value->XAdvDevice, x_ppem);
if (format & OTF_YAdvance)
adjustment[i].yadv
+= otfg->f.f1.value->YAdvance * y_scale / 0x10000;
if (format & OTF_YAdvDevice)
adjustment[i].yadv
+= DEVICE_DELTA (otfg->f.f1.value->YAdvDevice, y_ppem);
adjustment[i].set = 1;
}
break;
case 3: /* Cursive */
/* Not yet supported. */
break;
case 4: /* Mark-to-Base */
case 5: /* Mark-to-Ligature */
if (! base)
break;
prev = base;
goto label_adjust_anchor;
default: /* i.e. case 6 Mark-to-Mark */
if (! mark)
break;
prev = mark;
label_adjust_anchor:
{
int base_x, base_y, mark_x, mark_y;
int this_from, this_to;
base_x = otfg->f.f4.base_anchor->XCoordinate * x_scale / 0x10000;
base_y = otfg->f.f4.base_anchor->YCoordinate * y_scale / 0x10000;
mark_x = otfg->f.f4.mark_anchor->XCoordinate * x_scale / 0x10000;
mark_y = otfg->f.f4.mark_anchor->YCoordinate * y_scale / 0x10000;
if (otfg->f.f4.base_anchor->AnchorFormat != 1)
adjust_anchor (ft_face, otfg->f.f4.base_anchor, prev->g.code,
x_ppem, y_ppem, &base_x, &base_y);
if (otfg->f.f4.mark_anchor->AnchorFormat != 1)
adjust_anchor (ft_face, otfg->f.f4.mark_anchor, g->g.code,
x_ppem, y_ppem, &mark_x, &mark_y);
adjustment[i].xoff = (base_x - mark_x);
adjustment[i].yoff = - (base_y - mark_y);
adjustment[i].back = (g - prev);
adjustment[i].xadv = 0;
adjustment[i].advance_is_absolute = 1;
adjustment[i].set = 1;
this_from = g->g.from;
this_to = g->g.to;
for (j = 0; prev + j < g; j++)
{
if (this_from > prev[j].g.from)
this_from = prev[j].g.from;
if (this_to < prev[j].g.to)
this_to = prev[j].g.to;
}
for (; prev <= g; prev++)
{
prev->g.from = this_from;
prev->g.to = this_to;
}
}
}
if (otfg->GlyphClass == OTF_GlyphClass0)
base = mark = g;
else if (otfg->GlyphClass == OTF_GlyphClassMark)
mark = g;
else
base = g;
}
}
SAFE_FREE ();
return to;
simple_copy:
SAFE_FREE ();
if (out->allocated < out->used + len)
return -2;
font->get_metrics (font, in, from, to);
memcpy (out_glyphs + out->used, in_glyphs,
sizeof (MFLTGlyphFT) * len);
out->used += len;
return to;
}
#endif /* not M17N_FLT_USE_NEW_FEATURE */
static MFLTGlyphString gstring;
static bool m17n_flt_initialized;
static Lisp_Object
ftfont_shape_by_flt (Lisp_Object lgstring, struct font *font,
FT_Face ft_face, OTF *otf, FT_Matrix *matrix)
{
ptrdiff_t len = LGSTRING_GLYPH_LEN (lgstring);
ptrdiff_t i;
struct MFLTFontFT flt_font_ft;
MFLT *flt = NULL;
bool with_variation_selector = false;
if (! m17n_flt_initialized)
{
M17N_INIT ();
#ifdef M17N_FLT_USE_NEW_FEATURE
mflt_enable_new_feature = 1;
mflt_try_otf = ftfont_try_otf;
#endif /* M17N_FLT_USE_NEW_FEATURE */
m17n_flt_initialized = 1;
}
for (i = 0; i < len; i++)
{
Lisp_Object g = LGSTRING_GLYPH (lgstring, i);
int c;
if (NILP (g))
break;
c = LGLYPH_CHAR (g);
if (CHAR_VARIATION_SELECTOR_P (c))
with_variation_selector = true;
}
len = i;
if (otf && with_variation_selector)
{
setup_otf_gstring (len);
for (i = 0; i < len; i++)
{
Lisp_Object g = LGSTRING_GLYPH (lgstring, i);
otf_gstring.glyphs[i].c = LGLYPH_CHAR (g);
otf_gstring.glyphs[i].f.index.from = LGLYPH_FROM (g);
otf_gstring.glyphs[i].f.index.to = LGLYPH_TO (g);
}
OTF_drive_cmap (otf, &otf_gstring);
for (i = 0; i < otf_gstring.used; i++)
{
OTF_Glyph *otfg = otf_gstring.glyphs + i;
Lisp_Object g0 = LGSTRING_GLYPH (lgstring, otfg->f.index.from);
Lisp_Object g1 = LGSTRING_GLYPH (lgstring, otfg->f.index.to);
LGLYPH_SET_CODE (g0, otfg->glyph_id);
LGLYPH_SET_TO (g0, LGLYPH_TO (g1));
LGSTRING_SET_GLYPH (lgstring, i, g0);
}
if (len > otf_gstring.used)
{
len = otf_gstring.used;
LGSTRING_SET_GLYPH (lgstring, len, Qnil);
}
}
{
Lisp_Object family = Ffont_get (LGSTRING_FONT (lgstring), QCfamily);
if (NILP (family))
flt_font_ft.flt_font.family = Mnil;
else
flt_font_ft.flt_font.family
= msymbol (SSDATA (Fdowncase (SYMBOL_NAME (family))));
}
flt_font_ft.flt_font.x_ppem = ft_face->size->metrics.x_ppem;
flt_font_ft.flt_font.y_ppem = ft_face->size->metrics.y_ppem;
flt_font_ft.flt_font.get_glyph_id = ftfont_get_glyph_id;
flt_font_ft.flt_font.get_metrics = ftfont_get_metrics;
flt_font_ft.flt_font.check_otf = ftfont_check_otf;
flt_font_ft.flt_font.drive_otf = ftfont_drive_otf;
flt_font_ft.flt_font.internal = NULL;
flt_font_ft.font = font;
flt_font_ft.ft_face = ft_face;
flt_font_ft.otf = otf;
flt_font_ft.matrix = matrix->xx != 0 ? matrix : 0;
if (1 < len)
{
/* A little bit ad hoc. Perhaps, shaper must get script and
language information, and select a proper flt for them
here. */
int c1 = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, 1));
/* For the combining characters in the range U+300..U+36F,
"combining" is the sole FLT provided by the m17n-lib. In
addition, it is the sole FLT that can handle the other
combining characters with non-OTF fonts. */
if ((0x300 <= c1 && c1 <= 0x36F)
|| (! otf && CHAR_HAS_CATEGORY (c1, '^')))
flt = mflt_get (msymbol ("combining"));
}
if (! flt && ! otf)
{
flt = mflt_find (LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, 0)),
&flt_font_ft.flt_font);
if (! flt)
return make_fixnum (0);
}
MFLTGlyphFT *glyphs = (MFLTGlyphFT *) gstring.glyphs;
ptrdiff_t allocated = gstring.allocated;
ptrdiff_t incr_min = len - allocated;
do
{
if (0 < incr_min)
{
xfree (glyphs);
glyphs = xpalloc (NULL, &allocated, incr_min, INT_MAX, sizeof *glyphs);
}
incr_min = 1;
for (i = 0; i < len; i++)
{
Lisp_Object g = LGSTRING_GLYPH (lgstring, i);
memset (&glyphs[i], 0, sizeof glyphs[i]);
glyphs[i].g.c = LGLYPH_CHAR (g);
if (with_variation_selector)
{
glyphs[i].g.code = LGLYPH_CODE (g);
glyphs[i].g.encoded = 1;
}
}
gstring.glyph_size = sizeof *glyphs;
gstring.glyphs = (MFLTGlyph *) glyphs;
gstring.allocated = allocated;
gstring.used = len;
gstring.r2l = 0;
}
while (mflt_run (&gstring, 0, len, &flt_font_ft.flt_font, flt) == -2);
if (gstring.used > LGSTRING_GLYPH_LEN (lgstring))
return Qnil;
for (i = 0; i < gstring.used; i++)
{
MFLTGlyphFT *g = (MFLTGlyphFT *) (gstring.glyphs) + i;
g->g.from = LGLYPH_FROM (LGSTRING_GLYPH (lgstring, g->g.from));
g->g.to = LGLYPH_TO (LGSTRING_GLYPH (lgstring, g->g.to));
}
for (i = 0; i < gstring.used; i++)
{
Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, i);
MFLTGlyphFT *g = (MFLTGlyphFT *) (gstring.glyphs) + i;
if (NILP (lglyph))
{
lglyph = LGLYPH_NEW ();
LGSTRING_SET_GLYPH (lgstring, i, lglyph);
}
LGLYPH_SET_FROM (lglyph, g->g.from);
LGLYPH_SET_TO (lglyph, g->g.to);
LGLYPH_SET_CHAR (lglyph, g->g.c);
LGLYPH_SET_CODE (lglyph, g->g.code);
LGLYPH_SET_WIDTH (lglyph, g->g.xadv >> 6);
LGLYPH_SET_LBEARING (lglyph, g->g.lbearing >> 6);
LGLYPH_SET_RBEARING (lglyph, g->g.rbearing >> 6);
LGLYPH_SET_ASCENT (lglyph, g->g.ascent >> 6);
LGLYPH_SET_DESCENT (lglyph, g->g.descent >> 6);
if (g->g.adjusted)
{
Lisp_Object vec = make_uninit_vector (3);
ASET (vec, 0, make_fixnum (g->g.xoff >> 6));
ASET (vec, 1, make_fixnum (g->g.yoff >> 6));
ASET (vec, 2, make_fixnum (g->g.xadv >> 6));
LGLYPH_SET_ADJUSTMENT (lglyph, vec);
}
}
return make_fixnum (i);
}
#endif /* HAVE_M17N_FLT */
#ifdef HAVE_OTF_GET_VARIATION_GLYPHS
int
ftfont_variation_glyphs (struct font *font, int c, unsigned variations[256])
{
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
OTF *otf = ftfont_get_otf (ftfont_info);
if (! otf)
return 0;
return OTF_get_variation_glyphs (otf, c, variations);
}
#endif /* HAVE_OTF_GET_VARIATION_GLYPHS */
#endif /* HAVE_LIBOTF */
#ifdef HAVE_HARFBUZZ
static hb_unicode_combining_class_t
uni_combining (hb_unicode_funcs_t *funcs, hb_codepoint_t ch, void *user_data)
{
Lisp_Object table, combining;
/* FIXME: Is it efficient to load the table each time? */
table = Funicode_property_table_internal (intern ("canonical-combining-class"));
combining = Fget_unicode_property_internal (table, make_fixnum (ch));
if (INTEGERP (combining))
return (hb_unicode_combining_class_t) XFIXNUM (combining);
return HB_UNICODE_COMBINING_CLASS_NOT_REORDERED;
}
static hb_unicode_general_category_t
uni_general (hb_unicode_funcs_t *funcs, hb_codepoint_t ch, void *user_data)
{
Lisp_Object category = CHAR_TABLE_REF (Vunicode_category_table, ch);
if (INTEGERP (category))
{
switch (XFIXNUM (category))
{
case UNICODE_CATEGORY_Cc:
return HB_UNICODE_GENERAL_CATEGORY_CONTROL;
case UNICODE_CATEGORY_Cf:
return HB_UNICODE_GENERAL_CATEGORY_FORMAT;
case UNICODE_CATEGORY_Cn:
return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
case UNICODE_CATEGORY_Co:
return HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE;
case UNICODE_CATEGORY_Cs:
return HB_UNICODE_GENERAL_CATEGORY_SURROGATE;
case UNICODE_CATEGORY_Ll:
return HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER;
case UNICODE_CATEGORY_Lm:
return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER;
case UNICODE_CATEGORY_Lo:
return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
case UNICODE_CATEGORY_Lt:
return HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER;
case UNICODE_CATEGORY_Lu:
return HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER;
case UNICODE_CATEGORY_Mc:
return HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK;
case UNICODE_CATEGORY_Me:
return HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
case UNICODE_CATEGORY_Mn:
return HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK;
case UNICODE_CATEGORY_Nd:
return HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER;
case UNICODE_CATEGORY_Nl:
return HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER;
case UNICODE_CATEGORY_No:
return HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER;
case UNICODE_CATEGORY_Pc:
return HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION;
case UNICODE_CATEGORY_Pd:
return HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION;
case UNICODE_CATEGORY_Pe:
return HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION;
case UNICODE_CATEGORY_Pf:
return HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION;
case UNICODE_CATEGORY_Pi:
return HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION;
case UNICODE_CATEGORY_Po:
return HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION;
case UNICODE_CATEGORY_Ps:
return HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION;
case UNICODE_CATEGORY_Sc:
return HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL;
case UNICODE_CATEGORY_Sk:
return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL;
case UNICODE_CATEGORY_Sm:
return HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL;
case UNICODE_CATEGORY_So:
return HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL;
case UNICODE_CATEGORY_Zl:
return HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR;
case UNICODE_CATEGORY_Zp:
return HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR;
case UNICODE_CATEGORY_Zs:
return HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
case UNICODE_CATEGORY_UNKNOWN:
return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
}
}
return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
}
static hb_codepoint_t
uni_mirroring (hb_unicode_funcs_t *funcs, hb_codepoint_t ch, void *user_data)
{
return bidi_mirror_char (ch);
}
static hb_script_t
uni_script (hb_unicode_funcs_t *funcs, hb_codepoint_t ch, void *user_data)
{
Lisp_Object script = CHAR_TABLE_REF (Vchar_script_table, ch);
if (SYMBOLP (script))
{
/* FIXME: from_string wants an ISO 15924 script tag here. */
return hb_script_from_string (SSDATA (SYMBOL_NAME (script)),
SBYTES (SYMBOL_NAME (script)));
}
return HB_SCRIPT_INVALID;
}
static hb_bool_t
uni_compose (hb_unicode_funcs_t *funcs, hb_codepoint_t a, hb_codepoint_t b,
hb_codepoint_t *ab, void *user_data)
{
/* FIXME: implement */
return false;
}
static hb_bool_t
uni_decompose (hb_unicode_funcs_t *funcs, hb_codepoint_t ab, hb_codepoint_t *a,
hb_codepoint_t *b, void *user_data)
{
/* FIXME: implement */
return false;
}
static hb_unicode_funcs_t *
get_hb_unicode_funcs (void)
{
hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (NULL);
hb_unicode_funcs_set_combining_class_func (funcs, uni_combining, NULL, NULL);
hb_unicode_funcs_set_general_category_func (funcs, uni_general, NULL, NULL);
hb_unicode_funcs_set_mirroring_func (funcs, uni_mirroring, NULL, NULL);
hb_unicode_funcs_set_script_func (funcs, uni_script, NULL, NULL);
hb_unicode_funcs_set_compose_func (funcs, uni_compose, NULL, NULL);
hb_unicode_funcs_set_decompose_func (funcs, uni_decompose, NULL, NULL);
return funcs;
}
static Lisp_Object
ftfont_shape_by_hb (Lisp_Object lgstring, FT_Face ft_face, hb_font_t *hb_font,
FT_Matrix *matrix)
{
ptrdiff_t glyph_len = 0, text_len = LGSTRING_GLYPH_LEN (lgstring);
ptrdiff_t i;
hb_glyph_info_t *info;
hb_glyph_position_t *pos;
/* FIXME: cache the buffer */
hb_buffer_t *hb_buffer = hb_buffer_create ();
hb_buffer_pre_allocate (hb_buffer, text_len);
for (i = 0; i < text_len; i++)
{
Lisp_Object g = LGSTRING_GLYPH (lgstring, i);
int c;
if (NILP (g))
break;
c = LGLYPH_CHAR (g);
hb_buffer_add (hb_buffer, c, i);
}
text_len = i;
if (!text_len)
goto done;
hb_unicode_funcs_t* ufuncs = get_hb_unicode_funcs();
hb_buffer_set_unicode_funcs(hb_buffer, ufuncs);
hb_buffer_set_content_type (hb_buffer, HB_BUFFER_CONTENT_TYPE_UNICODE);
hb_buffer_set_cluster_level (hb_buffer, HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS);
/* FIXME: guess_segment_properties is BAD BAD BAD.
* we need to get these properties with the LGSTRING. */
#if 1
hb_buffer_guess_segment_properties (hb_buffer);
#else
hb_buffer_set_direction (hb_buffer, XXX);
hb_buffer_set_script (hb_buffer, XXX);
hb_buffer_set_language (hb_buffer, XXX);
#endif
if (!hb_shape_full (hb_font, hb_buffer, NULL, 0, NULL))
goto done;
glyph_len = hb_buffer_get_length (hb_buffer);
/* FIXME: number of output glyphs can legitimately be larger than number of
* output characters, what to do in this case? */
if (glyph_len > LGSTRING_GLYPH_LEN (lgstring))
return Qnil;
/* FIXME: Emacs wants the buffer reversed, WHY! */
if (HB_DIRECTION_IS_BACKWARD (hb_buffer_get_direction (hb_buffer)))
hb_buffer_reverse_clusters (hb_buffer);
info = hb_buffer_get_glyph_infos (hb_buffer, NULL);
pos = hb_buffer_get_glyph_positions (hb_buffer, NULL);
for (i = 0; i < glyph_len; i++)
{
Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, i);
EMACS_INT from, to;
int advance = 0, lbearing, rbearing, ascent, descent;
ptrdiff_t j = i;
if (NILP (lglyph))
{
lglyph = LGLYPH_NEW ();
LGSTRING_SET_GLYPH (lgstring, i, lglyph);
}
from = to = info[i].cluster;
/* FIXME: what does “from” mean here? */
LGLYPH_SET_FROM (lglyph, from);
/* FIXME: what does “to” mean here? */
for (j = i; j < glyph_len && info[j].cluster == info[i].cluster; j++)
;
to = (j == glyph_len) ? text_len - 1 : info[j].cluster - 1;
LGLYPH_SET_TO (lglyph, to);
/* FIXME: is this really needed? Not all glyphs map directly to a single character */
LGLYPH_SET_CHAR (lglyph, LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, from)));
LGLYPH_SET_CODE (lglyph, info[i].codepoint);
if (ftfont_glyph_metrics (ft_face, info[i].codepoint, &advance, &lbearing,
&rbearing, &ascent, &descent))
{
LGLYPH_SET_WIDTH (lglyph, advance);
LGLYPH_SET_LBEARING (lglyph, lbearing);
LGLYPH_SET_RBEARING (lglyph, rbearing);
LGLYPH_SET_ASCENT (lglyph, ascent);
LGLYPH_SET_DESCENT (lglyph, descent);
}
if (pos[i].x_offset || pos[i].y_offset ||
(pos[i].x_advance >> 6) != advance)
{
Lisp_Object vec = make_uninit_vector (3);
ASET (vec, 0, make_fixnum (pos[i].x_offset >> 6));
ASET (vec, 1, make_fixnum (-(pos[i].y_offset >> 6)));
ASET (vec, 2, make_fixnum (pos[i].x_advance >> 6));
LGLYPH_SET_ADJUSTMENT (lglyph, vec);
}
}
done:
hb_buffer_destroy (hb_buffer);
return make_fixnum (glyph_len);
}
#endif /* HAVE_HARFBUZZ */
#if defined HAVE_M17N_FLT || defined HAVE_HARFBUZZ
Lisp_Object
ftfont_shape (Lisp_Object lgstring)
{
struct font *font = CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring));
struct ftfont_info *ftfont_info = (struct ftfont_info *) font;
#ifdef HAVE_HARFBUZZ
if (getenv ("EMACS_NO_HARFBUZZ") == NULL)
{
hb_font_t *hb_font = ftfont_get_hb_font (ftfont_info);
return ftfont_shape_by_hb (lgstring, ftfont_info->ft_size->face,
hb_font, &ftfont_info->matrix);
}
else
#endif /* HAVE_HARFBUZZ */
{
OTF *otf = ftfont_get_otf (ftfont_info);
return ftfont_shape_by_flt (lgstring, font, ftfont_info->ft_size->face,
otf, &ftfont_info->matrix);
}
}
#endif /* defined HAVE_M17N_FLT || defined HAVE_HARFBUZZ */
static const char *const ftfont_booleans [] = {
":antialias",
":hinting",
":verticallayout",
":autohint",
":globaladvance",
":outline",
":scalable",
":minspace",
":embolden",
NULL,
};
static const char *const ftfont_non_booleans [] = {
":family",
":familylang",
":style",
":stylelang",
":fullname",
":fullnamelang",
":slant",
":weight",
":size",
":width",
":aspect",
":pixelsize",
":spacing",
":foundry",
":hintstyle",
":file",
":index",
":ftface",
":rasterizer",
":scale",
":dpi",
":rgba",
":lcdfilter",
":charset",
":lang",
":fontversion",
":capability",
NULL,
};
void
ftfont_filter_properties (Lisp_Object font, Lisp_Object alist)
{
font_filter_properties (font, alist, ftfont_booleans, ftfont_non_booleans);
}
Lisp_Object
ftfont_combining_capability (struct font *font)
{
#if defined HAVE_M17N_FLT || defined HAVE_HARFBUZZ
return Qt;
#else
return Qnil;
#endif
}
static struct font_driver const ftfont_driver =
{
/* We can't draw a text without device dependent functions. */
.type = LISPSYM_INITIALLY (Qfreetype),
.get_cache = ftfont_get_cache,
.list = ftfont_list,
.match = ftfont_match,
.list_family = ftfont_list_family,
.open = ftfont_open,
.close = ftfont_close,
.has_char = ftfont_has_char,
.encode_char = ftfont_encode_char,
.text_extents = ftfont_text_extents,
.get_bitmap = ftfont_get_bitmap,
.anchor_point = ftfont_anchor_point,
#ifdef HAVE_LIBOTF
.otf_capability = ftfont_otf_capability,
#endif
#if defined HAVE_M17N_FLT || defined HAVE_HARFBUZZ
.shape = ftfont_shape,
#endif
#ifdef HAVE_OTF_GET_VARIATION_GLYPHS
.get_variation_glyphs = ftfont_variation_glyphs,
#endif
.filter_properties = ftfont_filter_properties,
.combining_capability = ftfont_combining_capability,
};
void
syms_of_ftfont (void)
{
/* Symbolic type of this font-driver. */
DEFSYM (Qfreetype, "freetype");
/* Fontconfig's generic families and their aliases. */
DEFSYM (Qmonospace, "monospace");
DEFSYM (Qsans_serif, "sans-serif");
DEFSYM (Qsans, "sans");
DEFSYM (Qsans__serif, "sans serif");
staticpro (&freetype_font_cache);
freetype_font_cache = list1 (Qt);
staticpro (&ftfont_generic_family_list);
ftfont_generic_family_list = list3 (Fcons (Qmonospace, Qt),
Fcons (Qsans_serif, Qt),
Fcons (Qsans, Qt));
staticpro (&ft_face_cache);
ft_face_cache = Qnil;
register_font_driver (&ftfont_driver, NULL);
}