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[utils] Add hb-fc-list 

This is a tool that lists all fonts that can render a given string.
It uses hb_shape() to do so, and as such is aware of HarfBuzz's
normalizer.
This commit is contained in:
Behdad Esfahbod 2014-08-06 16:49:51 -04:00
parent eb0bf3ae66
commit fe97b65a54
5 changed files with 451 additions and 0 deletions
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19
configure.ac
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@ -235,6 +235,24 @@ AM_CONDITIONAL(HAVE_CAIRO_FT, $have_cairo_ft)
dnl ==========================================================================
AC_ARG_WITH(fontconfig,
[AS_HELP_STRING([--with-fontconfig=@<:@yes/no/auto@:>@],
[Use fontconfig @<:@default=auto@:>@])],,
[with_fontconfig=auto])
have_fontconfig=false
if test "x$with_fontconfig" = "xyes" -o "x$with_fontconfig" = "xauto"; then
PKG_CHECK_MODULES(FONTCONFIG, fontconfig, have_fontconfig=true, :)
fi
if test "x$with_fontconfig" = "xyes" -a "x$have_fontconfig" != "xtrue"; then
AC_MSG_ERROR([fontconfig support requested but not found])
fi
if $have_fontconfig; then
AC_DEFINE(HAVE_FONTCONFIG, 1, [Have fontconfig library])
fi
AM_CONDITIONAL(HAVE_FONTCONFIG, $have_fontconfig)
dnl ==========================================================================
AC_ARG_WITH(icu,
[AS_HELP_STRING([--with-icu=@<:@yes/no/auto@:>@],
[Use ICU @<:@default=auto@:>@])],,
@ -438,6 +456,7 @@ Font callbacks (the more the better):
Tools used for command-line utilities:
Cairo: ${have_cairo}
Fontconfig: ${have_fontconfig}
Additional shapers (the more the better):
Graphite2: ${have_graphite2}

15
util/Makefile.am
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@ -76,4 +76,19 @@ endif # HAVE_OT
endif # HAVE_GLIB
if HAVE_OT
if HAVE_FONTCONFIG
hb_fc_list_SOURCES = \
hb-fc.cc \
hb-fc.h \
hb-fc-list.c \
$(NULL)
hb_fc_list_LDADD = \
$(LDADD) \
$(FONTCONFIG_LIBS) \
$(NULL)
bin_PROGRAMS += hb-fc-list
endif # HAVE_FONTCONFIG
endif # HAVE_OT
-include $(top_srcdir)/git.mk

222
util/hb-fc-list.c Normal file
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@ -0,0 +1,222 @@
/*
* Copyright © 2002 Keith Packard
* Copyright © 2014 Google, Inc.
*
* 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.
*
* Google Author(s): Behdad Esfahbod
*/
#define HAVE_GETOPT_LONG 1 /* XXX */
#include "hb-fc.h"
#include <fontconfig/fontconfig.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
#else
#ifdef linux
#define HAVE_GETOPT_LONG 1
#endif
#define HAVE_GETOPT 1
#endif
#ifndef HAVE_GETOPT
#define HAVE_GETOPT 0
#endif
#ifndef HAVE_GETOPT_LONG
#define HAVE_GETOPT_LONG 0
#endif
#if HAVE_GETOPT_LONG
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <getopt.h>
const struct option longopts[] = {
{"verbose", 0, 0, 'v'},
{"format", 1, 0, 'f'},
{"quiet", 0, 0, 'q'},
{"version", 0, 0, 'V'},
{"help", 0, 0, 'h'},
{NULL,0,0,0},
};
#else
#if HAVE_GETOPT
extern char *optarg;
extern int optind, opterr, optopt;
#endif
#endif
static void
usage (char *program, int error)
{
FILE *file = error ? stderr : stdout;
#if HAVE_GETOPT_LONG
fprintf (file, "usage: %s [-vqVh] [-f FORMAT] [--verbose] [--format=FORMAT] [--quiet] [--version] [--help] text [pattern] {element ...} \n",
program);
#else
fprintf (file, "usage: %s [-vqVh] [-f FORMAT] text [pattern] {element ...} \n",
program);
#endif
fprintf (file, "List fonts matching [pattern] that can render [text]\n");
fprintf (file, "\n");
#if HAVE_GETOPT_LONG
fprintf (file, " -v, --verbose display entire font pattern verbosely\n");
fprintf (file, " -f, --format=FORMAT use the given output format\n");
fprintf (file, " -q, --quiet suppress all normal output, exit 1 if no fonts matched\n");
fprintf (file, " -V, --version display font config version and exit\n");
fprintf (file, " -h, --help display this help and exit\n");
#else
fprintf (file, " -v (verbose) display entire font pattern verbosely\n");
fprintf (file, " -f FORMAT (format) use the given output format\n");
fprintf (file, " -q, (quiet) suppress all normal output, exit 1 if no fonts matched\n");
fprintf (file, " -V (version) display HarfBuzz version and exit\n");
fprintf (file, " -h (help) display this help and exit\n");
#endif
exit (error);
}
int
main (int argc, char **argv)
{
int verbose = 0;
int quiet = 0;
const FcChar8 *format = NULL;
int nfont = 0;
int i;
FcObjectSet *os = 0;
FcFontSet *fs;
FcPattern *pat;
const char *text;
#if HAVE_GETOPT_LONG || HAVE_GETOPT
int c;
#if HAVE_GETOPT_LONG
while ((c = getopt_long (argc, argv, "vf:qVh", longopts, NULL)) != -1)
#else
while ((c = getopt (argc, argv, "vf:qVh")) != -1)
#endif
{
switch (c) {
case 'v':
verbose = 1;
break;
case 'f':
format = (FcChar8 *) strdup (optarg);
break;
case 'q':
quiet = 1;
break;
case 'V':
fprintf (stderr, "fontconfig version %d.%d.%d\n",
FC_MAJOR, FC_MINOR, FC_REVISION);
exit (0);
case 'h':
usage (argv[0], 0);
default:
usage (argv[0], 1);
}
}
i = optind;
#else
i = 1;
#endif
if (!argv[i])
usage (argv[0], 1);
text = argv[i];
i++;
if (argv[i])
{
pat = FcNameParse ((FcChar8 *) argv[i]);
if (!pat)
{
fputs ("Unable to parse the pattern\n", stderr);
return 1;
}
while (argv[++i])
{
if (!os)
os = FcObjectSetCreate ();
FcObjectSetAdd (os, argv[i]);
}
}
else
pat = FcPatternCreate ();
if (quiet && !os)
os = FcObjectSetCreate ();
if (!verbose && !format && !os)
os = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_FILE, (char *) 0);
FcObjectSetAdd (os, FC_CHARSET);
if (!format)
format = (const FcChar8 *) "%{=fclist}\n";
fs = FcFontList (0, pat, os);
if (os)
FcObjectSetDestroy (os);
if (pat)
FcPatternDestroy (pat);
if (!quiet && fs)
{
int j;
for (j = 0; j < fs->nfont; j++)
{
hb_font_t *font = hb_fc_font_create (fs->fonts[j]);
hb_bool_t can_render = hb_fc_can_render (font, text);
hb_font_destroy (font);
if (!can_render)
continue;
FcPatternDel (fs->fonts[j], FC_CHARSET);
if (verbose)
{
FcPatternPrint (fs->fonts[j]);
}
else
{
FcChar8 *s;
s = FcPatternFormat (fs->fonts[j], format);
if (s)
{
printf ("%s", s);
FcStrFree (s);
}
}
}
}
if (fs) {
nfont = fs->nfont;
FcFontSetDestroy (fs);
}
FcFini ();
return quiet ? (nfont == 0 ? 1 : 0) : 0;
}

149
util/hb-fc.cc Normal file
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@ -0,0 +1,149 @@
/*
* Copyright © 2014 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#include <stdlib.h>
#include <stdio.h>
#include "hb-fc.h"
static hb_bool_t
hb_fc_get_glyph (hb_font_t *font /*HB_UNUSED*/,
void *font_data,
hb_codepoint_t unicode,
hb_codepoint_t variation_selector,
hb_codepoint_t *glyph,
void *user_data /*HB_UNUSED*/)
{
FcCharSet *cs = (FcCharSet *) font_data;
if (variation_selector)
{
/* Fontconfig doesn't cache cmap-14 info. However:
* 1. If the font maps the variation_selector, assume it's
* supported,
* 2. If the font doesn't map it, still say it's supported,
* but return 0. This way, the caller will see the zero
* and reject. If we return unsupported here, then the
* variation selector will be hidden and ignored.
*/
if (FcCharSetHasChar (cs, unicode) &&
FcCharSetHasChar (cs, variation_selector))
{
unsigned int var_num = 0;
if (variation_selector - 0xFE00u < 16)
var_num = variation_selector - 0xFE00 + 1;
else if (variation_selector - 0xE0100u < (256 - 16))
var_num = variation_selector - 0xE0100 + 17;
*glyph = (var_num << 21) | unicode;
}
else
{
*glyph = 0;
}
return true;
}
*glyph = FcCharSetHasChar (cs, unicode) ? unicode : 0;
return *glyph != 0;
}
static hb_font_funcs_t *
_hb_fc_get_font_funcs (void)
{
static const hb_font_funcs_t *fc_ffuncs;
const hb_font_funcs_t *ffuncs;
if (!(ffuncs = fc_ffuncs))
{
hb_font_funcs_t *newfuncs = hb_font_funcs_create ();
hb_font_funcs_set_glyph_func (newfuncs, hb_fc_get_glyph, NULL, NULL);
/* XXX MT-unsafe */
if (fc_ffuncs)
hb_font_funcs_destroy (newfuncs);
else
fc_ffuncs = ffuncs = newfuncs;
}
return const_cast<hb_font_funcs_t *> (fc_ffuncs);
}
hb_font_t *
hb_fc_font_create (FcPattern *fcfont)
{
static hb_face_t *face;
hb_font_t *font;
FcCharSet *cs;
if (FcResultMatch != FcPatternGetCharSet (fcfont, FC_CHARSET, 0, &cs))
return hb_font_get_empty ();
if (!face) /* XXX MT-unsafe */
face = hb_face_create (hb_blob_get_empty (), 0);
font = hb_font_create (face);
hb_font_set_funcs (font,
_hb_fc_get_font_funcs (),
FcCharSetCopy (cs),
(hb_destroy_func_t) FcCharSetDestroy);
return font;
}
hb_bool_t
hb_fc_can_render (hb_font_t *font, const char *text)
{
static const char *ot[] = {"ot", NULL};
hb_buffer_t *buffer = hb_buffer_create ();
hb_buffer_add_utf8 (buffer, text, -1, 0, -1);
/* XXX Do we need this? I think Arabic and Hangul shapers are the
* only one that make any use of this. The Hangul case is not really
* needed, and for Arabic we'll miss a very narrow set of fonts.
* Might be better to force generic shaper perhaps. */
hb_buffer_guess_segment_properties (buffer);
if (!hb_shape_full (font, buffer, NULL, 0, ot))
abort (); /* hb-ot shaper not enabled? */
unsigned int len;
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, &len);
for (unsigned int i = 0; i < len; i++)
{
if (!info[i].codepoint)
{
return false;
}
}
return true;
}

46
util/hb-fc.h Normal file
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@ -0,0 +1,46 @@
/*
* Copyright © 2014 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_FC_H
#define HB_FC_H
#include "hb.h"
#include <fontconfig/fontconfig.h>
HB_BEGIN_DECLS
hb_font_t *
hb_fc_font_create (FcPattern *font);
hb_bool_t
hb_fc_can_render (hb_font_t *font, const char *text);
HB_END_DECLS
#endif /* HB_FC_H */