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harfbuzz/util/options.cc

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/*
* Copyright © 2011,2012 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 "options.hh"
#ifdef HAVE_FREETYPE
#include <hb-ft.h>
#endif
#include <hb-ot.h>
static struct supported_font_funcs_t {
char name[4];
void (*func) (hb_font_t *);
} supported_font_funcs[] =
{
#ifdef HAVE_FREETYPE
{"ft", hb_ft_font_set_funcs},
#endif
{"ot", hb_ot_font_set_funcs},
};
void
fail (hb_bool_t suggest_help, const char *format, ...)
{
const char *msg;
va_list vap;
va_start (vap, format);
msg = g_strdup_vprintf (format, vap);
va_end (vap);
const char *prgname = g_get_prgname ();
g_printerr ("%s: %s\n", prgname, msg);
if (suggest_help)
g_printerr ("Try `%s --help' for more information.\n", prgname);
exit (1);
}
static gchar *
shapers_to_string ()
{
GString *shapers = g_string_new (nullptr);
const char **shaper_list = hb_shape_list_shapers ();
for (; *shaper_list; shaper_list++) {
g_string_append (shapers, *shaper_list);
g_string_append_c (shapers, ',');
}
g_string_truncate (shapers, MAX (0, (gint)shapers->len - 1));
return g_string_free (shapers, false);
}
static G_GNUC_NORETURN gboolean
show_version (const char *name G_GNUC_UNUSED,
const char *arg G_GNUC_UNUSED,
gpointer data G_GNUC_UNUSED,
GError **error G_GNUC_UNUSED)
{
g_printf ("%s (%s) %s\n", g_get_prgname (), PACKAGE_NAME, PACKAGE_VERSION);
char *shapers = shapers_to_string ();
g_printf ("Available shapers: %s\n", shapers);
g_free (shapers);
if (strcmp (HB_VERSION_STRING, hb_version_string ()))
g_printf ("Linked HarfBuzz library has a different version: %s\n", hb_version_string ());
exit(0);
}
void
option_parser_t::add_main_options ()
{
GOptionEntry entries[] =
{
{"version", 0, G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK, (gpointer) &show_version, "Show version numbers", nullptr},
{nullptr}
};
g_option_context_add_main_entries (context, entries, nullptr);
}
void
option_parser_t::parse (int *argc, char ***argv)
{
setlocale (LC_ALL, "");
GError *parse_error = nullptr;
if (!g_option_context_parse (context, argc, argv, &parse_error))
{
if (parse_error)
{
fail (true, "%s", parse_error->message);
//g_error_free (parse_error);
}
else
fail (true, "Option parse error");
}
}
static gboolean
parse_variations (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
font_options_t *font_opts = (font_options_t *) data;
char *s = (char *) arg;
char *p;
font_opts->num_variations = 0;
g_free (font_opts->variations);
font_opts->variations = nullptr;
if (!*s)
return true;
/* count the variations first, so we can allocate memory */
p = s;
do {
font_opts->num_variations++;
p = strchr (p, ',');
if (p)
p++;
} while (p);
font_opts->variations = (hb_variation_t *) calloc (font_opts->num_variations, sizeof (*font_opts->variations));
if (!font_opts->variations)
return false;
/* now do the actual parsing */
p = s;
font_opts->num_variations = 0;
while (p && *p) {
char *end = strchr (p, ',');
if (hb_variation_from_string (p, end ? end - p : -1, &font_opts->variations[font_opts->num_variations]))
font_opts->num_variations++;
p = end ? end + 1 : nullptr;
}
return true;
}
static gboolean
parse_text (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
text_options_t *text_opts = (text_options_t *) data;
if (text_opts->text)
{
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Either --text or --unicodes can be provided but not both");
return false;
}
text_opts->text_len = -1;
text_opts->text = g_strdup (arg);
return true;
}
static gboolean
parse_unicodes (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
text_options_t *text_opts = (text_options_t *) data;
if (text_opts->text)
{
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Either --text or --unicodes can be provided but not both");
return false;
}
GString *gs = g_string_new (nullptr);
if (0 == strcmp (arg, "*"))
{
g_string_append_c (gs, '*');
}
else
{
char *s = (char *) arg;
char *p;
while (s && *s)
{
#define DELIMITERS "<+>{},;&#\\xXuUnNiI\n\t\v\f\r "
while (*s && strchr (DELIMITERS, *s))
s++;
if (!*s)
break;
errno = 0;
hb_codepoint_t u = strtoul (s, &p, 16);
if (errno || s == p)
{
g_string_free (gs, TRUE);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing Unicode values at: '%s'", s);
return false;
}
g_string_append_unichar (gs, u);
s = p;
}
}
text_opts->text_len = gs->len;
text_opts->text = g_string_free (gs, FALSE);
return true;
}
static gboolean
parse_font_size (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
font_options_t *font_opts = (font_options_t *) data;
if (0 == strcmp (arg, "upem"))
{
font_opts->font_size_y = font_opts->font_size_x = FONT_SIZE_UPEM;
return true;
}
switch (sscanf (arg, "%lf%*[ ,]%lf", &font_opts->font_size_x, &font_opts->font_size_y)) {
case 1: font_opts->font_size_y = font_opts->font_size_x; HB_FALLTHROUGH;
case 2: return true;
default:
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"%s argument should be one or two space-separated numbers",
name);
return false;
}
}
static gboolean
parse_font_ppem (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
font_options_t *font_opts = (font_options_t *) data;
switch (sscanf (arg, "%d%*[ ,]%d", &font_opts->x_ppem, &font_opts->y_ppem)) {
case 1: font_opts->y_ppem = font_opts->x_ppem; HB_FALLTHROUGH;
case 2: return true;
default:
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"%s argument should be one or two space-separated numbers",
name);
return false;
}
}
void
face_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"font-file", 0, 0, G_OPTION_ARG_STRING, &this->font_file, "Set font file-name", "filename"},
{"face-index", 0, 0, G_OPTION_ARG_INT, &this->face_index, "Set face index (default: 0)", "index"},
{nullptr}
};
parser->add_group (entries,
"face",
"Font-face options:",
"Options for the font face",
this);
}
void
font_options_t::add_options (option_parser_t *parser)
{
face_options_t::add_options (parser);
char *text = nullptr;
{
static_assert ((ARRAY_LENGTH_CONST (supported_font_funcs) > 0),
"No supported font-funcs found.");
GString *s = g_string_new (nullptr);
g_string_printf (s, "Set font functions implementation to use (default: %s)\n\n Supported font function implementations are: %s",
supported_font_funcs[0].name,
supported_font_funcs[0].name);
for (unsigned int i = 1; i < ARRAY_LENGTH (supported_font_funcs); i++)
{
g_string_append_c (s, '/');
g_string_append (s, supported_font_funcs[i].name);
}
text = g_string_free (s, FALSE);
parser->free_later (text);
}
char *font_size_text;
if (DEFAULT_FONT_SIZE == FONT_SIZE_UPEM)
font_size_text = (char *) "Font size (default: upem)";
else
{
font_size_text = g_strdup_printf ("Font size (default: %d)", DEFAULT_FONT_SIZE);
parser->free_later (font_size_text);
}
int font_size_flags = DEFAULT_FONT_SIZE == FONT_SIZE_NONE ? G_OPTION_FLAG_HIDDEN : 0;
GOptionEntry entries[] =
{
{"font-size", 0, font_size_flags,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_size, font_size_text, "1/2 integers or 'upem'"},
{"font-ppem", 0, font_size_flags,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_ppem, "Set x,y pixels per EM (default: 0; disabled)", "1/2 integers"},
{"font-ptem", 0, 0,
G_OPTION_ARG_DOUBLE, &this->ptem, "Set font point-size (default: 0; disabled)", "point-size"},
{"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"},
{"ft-load-flags", 0, 0, G_OPTION_ARG_INT, &this->ft_load_flags, "Set FreeType load-flags (default: 2)", "integer"},
{nullptr}
};
parser->add_group (entries,
"font",
"Font-instance options:",
"Options for the font instance",
this);
const gchar *variations_help = "Comma-separated list of font variations\n"
"\n"
" Variations are set globally. The format for specifying variation settings\n"
" follows. All valid CSS font-variation-settings values other than 'normal'\n"
" and 'inherited' are also accepted, though, not documented below.\n"
"\n"
" The format is a tag, optionally followed by an equals sign, followed by a\n"
" number. For example:\n"
"\n"
" \"wght=500\"\n"
" \"slnt=-7.5\"\n";
GOptionEntry entries2[] =
{
{"variations", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_variations, variations_help, "list"},
{nullptr}
};
parser->add_group (entries2,
"variations",
"Variations options:",
"Options for font variations used",
this);
}
void
text_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"text", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_text, "Set input text", "string"},
{"text-file", 0, 0, G_OPTION_ARG_STRING, &this->text_file, "Set input text file-name\n\n If no text is provided, standard input is used for input.\n", "filename"},
{"unicodes", 'u', 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_unicodes, "Set input Unicode codepoints", "list of hex numbers"},
{"text-before", 0, 0, G_OPTION_ARG_STRING, &this->text_before, "Set text context before each line", "string"},
{"text-after", 0, 0, G_OPTION_ARG_STRING, &this->text_after, "Set text context after each line", "string"},
{nullptr}
};
parser->add_group (entries,
"text",
"Text options:",
"Options for the input text",
this);
}
void
output_options_t::add_options (option_parser_t *parser,
const char **supported_formats)
{
const char *text;
if (!supported_formats)
text = "Set output serialization format";
else
{
char *items = g_strjoinv ("/", const_cast<char **> (supported_formats));
text = g_strdup_printf ("Set output format\n\n Supported output formats are: %s", items);
g_free (items);
parser->free_later ((char *) text);
}
GOptionEntry entries[] =
{
{"output-file", 'o', 0, G_OPTION_ARG_STRING, &this->output_file, "Set output file-name (default: stdout)","filename"},
{"output-format", 'O', 0, G_OPTION_ARG_STRING, &this->output_format, text, "format"},
{nullptr}
};
parser->add_group (entries,
"output",
"Output destination & format options:",
"Options for the destination & form of the output",
this);
}
face_options_t::cache_t face_options_t::cache {};
hb_blob_t *
face_options_t::get_blob () const
{
// XXX This does the job for now; will move to post_parse.
return cache.blob;
}
hb_face_t *
face_options_t::get_face () const
{
if (face)
return face;
if (!font_file)
fail (true, "No font file set");
const char *font_path = font_file;
if (0 == strcmp (font_path, "-"))
{
#if defined(_WIN32) || defined(__CYGWIN__)
setmode (fileno (stdin), O_BINARY);
font_path = "STDIN";
#else
font_path = "/dev/stdin";
#endif
}
if (!cache.font_path || 0 != strcmp (cache.font_path, font_path))
{
hb_blob_destroy (cache.blob);
cache.blob = hb_blob_create_from_file_or_fail (font_path);
free ((char *) cache.font_path);
cache.font_path = strdup (font_path);
if (!cache.blob)
fail (false, "%s: Failed reading file", font_path);
hb_face_destroy (cache.face);
cache.face = nullptr;
cache.face_index = (unsigned) -1;
}
if (cache.face_index != face_index)
{
hb_face_destroy (cache.face);
cache.face = hb_face_create (cache.blob, face_index);
cache.face_index = face_index;
}
face = cache.face;
return face;
}
hb_font_t *
font_options_t::get_font () const
{
if (font)
return font;
auto *face = get_face ();
font = hb_font_create (face);
if (font_size_x == FONT_SIZE_UPEM)
font_size_x = hb_face_get_upem (face);
if (font_size_y == FONT_SIZE_UPEM)
font_size_y = hb_face_get_upem (face);
hb_font_set_ppem (font, x_ppem, y_ppem);
hb_font_set_ptem (font, ptem);
int scale_x = (int) scalbnf (font_size_x, subpixel_bits);
int scale_y = (int) scalbnf (font_size_y, subpixel_bits);
hb_font_set_scale (font, scale_x, scale_y);
hb_font_set_variations (font, variations, num_variations);
void (*set_font_funcs) (hb_font_t *) = nullptr;
if (!font_funcs)
{
set_font_funcs = supported_font_funcs[0].func;
}
else
{
for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++)
if (0 == g_ascii_strcasecmp (font_funcs, supported_font_funcs[i].name))
{
set_font_funcs = supported_font_funcs[i].func;
break;
}
if (!set_font_funcs)
{
GString *s = g_string_new (nullptr);
for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++)
{
if (i)
g_string_append_c (s, '/');
g_string_append (s, supported_font_funcs[i].name);
}
char *p = g_string_free (s, FALSE);
fail (false, "Unknown font function implementation `%s'; supported values are: %s; default is %s",
font_funcs,
p,
supported_font_funcs[0].name);
//free (p);
}
}
set_font_funcs (font);
#ifdef HAVE_FREETYPE
hb_ft_font_set_load_flags (font, ft_load_flags);
#endif
return font;
}
const char *
text_options_t::get_line (unsigned int *len, int eol)
{
if (text) {
if (!line)
{
line = text;
line_len = text_len;
}
if (line_len == UINT_MAX)
line_len = strlen (line);
if (!line_len) {
*len = 0;
return nullptr;
}
const char *ret = line;
const char *p = (const char *) memchr (line, eol, line_len);
unsigned int ret_len;
if (!p) {
ret_len = line_len;
line += ret_len;
line_len = 0;
} else {
ret_len = p - ret;
line += ret_len + 1;
line_len -= ret_len + 1;
}
*len = ret_len;
return ret;
}
if (!fp) {
if (!text_file)
fail (true, "At least one of text or text-file must be set");
if (0 != strcmp (text_file, "-"))
fp = fopen (text_file, "r");
else
fp = stdin;
if (!fp)
fail (false, "Failed opening text file `%s': %s",
text_file, strerror (errno));
gs = g_string_new (nullptr);
}
g_string_set_size (gs, 0);
char buf[BUFSIZ];
while (fgets (buf, sizeof (buf), fp))
{
unsigned bytes = strlen (buf);
if (bytes && (int) (unsigned char) buf[bytes - 1] == eol)
{
bytes--;
g_string_append_len (gs, buf, bytes);
break;
}
g_string_append_len (gs, buf, bytes);
}
if (ferror (fp))
fail (false, "Failed reading text: %s", strerror (errno));
*len = gs->len;
return !*len && feof (fp) ? nullptr : gs->str;
}
FILE *
output_options_t::get_file_handle ()
{
if (fp)
return fp;
if (output_file)
fp = fopen (output_file, "wb");
else {
#if defined(_WIN32) || defined(__CYGWIN__)
setmode (fileno (stdout), O_BINARY);
#endif
fp = stdout;
}
if (!fp)
fail (false, "Cannot open output file `%s': %s",
g_filename_display_name (output_file), strerror (errno));
return fp;
}
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