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HarfBuzz text shaping engine http://harfbuzz.github.io/
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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
#ifdef HAVE_OT
#include <hb-ot.h>
#endif
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
#ifdef HAVE_OT
{"ot", hb_ot_font_set_funcs},
#endif
};
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 (void)
{
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 (void)
{
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);
}
static gboolean
pre_parse (GOptionContext *context G_GNUC_UNUSED,
GOptionGroup *group G_GNUC_UNUSED,
gpointer data,
GError **error)
{
option_group_t *option_group = (option_group_t *) data;
option_group->pre_parse (error);
return *error == nullptr;
}
static gboolean
post_parse (GOptionContext *context G_GNUC_UNUSED,
GOptionGroup *group G_GNUC_UNUSED,
gpointer data,
GError **error)
{
option_group_t *option_group = static_cast<option_group_t *>(data);
option_group->post_parse (error);
return *error == nullptr;
}
void
option_parser_t::add_group (GOptionEntry *entries,
const gchar *name,
const gchar *description,
const gchar *help_description,
option_group_t *option_group)
{
GOptionGroup *group = g_option_group_new (name, description, help_description,
static_cast<gpointer>(option_group), nullptr);
g_option_group_add_entries (group, entries);
g_option_group_set_parse_hooks (group, pre_parse, post_parse);
g_option_context_add_group (context, group);
}
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 != nullptr) {
fail (true, "%s", parse_error->message);
//g_error_free (parse_error);
} else
fail (true, "Option parse error");
}
}
static gboolean
parse_margin (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
view_options_t *view_opts = (view_options_t *) data;
view_options_t::margin_t &m = view_opts->margin;
switch (sscanf (arg, "%lf%*[ ,]%lf%*[ ,]%lf%*[ ,]%lf", &m.t, &m.r, &m.b, &m.l)) {
case 1: m.r = m.t;
case 2: m.b = m.t;
case 3: m.l = m.r;
case 4: return true;
default:
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"%s argument should be one to four space-separated numbers",
name);
return false;
}
}
static gboolean
parse_shapers (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error)
{
shape_options_t *shape_opts = (shape_options_t *) data;
char **shapers = g_strsplit (arg, ",", 0);
for (char **shaper = shapers; *shaper; shaper++) {
bool found = false;
for (const char **hb_shaper = hb_shape_list_shapers (); *hb_shaper; hb_shaper++) {
if (strcmp (*shaper, *hb_shaper) == 0) {
found = true;
break;
}
}
if (!found) {
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Unknown or unsupported shaper: %s", *shaper);
g_strfreev (shapers);
return false;
}
}
g_strfreev (shape_opts->shapers);
shape_opts->shapers = shapers;
return true;
}
static G_GNUC_NORETURN gboolean
list_shapers (const char *name G_GNUC_UNUSED,
const char *arg G_GNUC_UNUSED,
gpointer data G_GNUC_UNUSED,
GError **error G_GNUC_UNUSED)
{
for (const char **shaper = hb_shape_list_shapers (); *shaper; shaper++)
g_printf ("%s\n", *shaper);
exit(0);
}
static gboolean
parse_features (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
shape_options_t *shape_opts = (shape_options_t *) data;
char *s = (char *) arg;
char *p;
shape_opts->num_features = 0;
g_free (shape_opts->features);
shape_opts->features = nullptr;
if (!*s)
return true;
/* count the features first, so we can allocate memory */
p = s;
do {
shape_opts->num_features++;
p = strchr (p, ',');
if (p)
p++;
} while (p);
shape_opts->features = (hb_feature_t *) calloc (shape_opts->num_features, sizeof (*shape_opts->features));
if (!shape_opts->features)
return false;
/* now do the actual parsing */
p = s;
shape_opts->num_features = 0;
while (p && *p) {
char *end = strchr (p, ',');
if (hb_feature_from_string (p, end ? end - p : -1, &shape_opts->features[shape_opts->num_features]))
shape_opts->num_features++;
p = end ? end + 1 : nullptr;
}
return true;
}
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 = 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);
char *s = (char *) arg;
char *p;
while (s && *s)
{
while (*s && strchr ("<+>{},;&#\\xXuUnNiI\n\t\v\f\r ", *s))
s++;
if (!*s)
break;
errno = 0;
hb_codepoint_t u = strtoul (s, &p, 16);
if (errno || s == p)
{
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 = g_string_free (gs, FALSE);
return true;
}
void
view_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"annotate", 0, 0, G_OPTION_ARG_NONE, &this->annotate, "Annotate output rendering", nullptr},
{"background", 0, 0, G_OPTION_ARG_STRING, &this->back, "Set background color (default: " DEFAULT_BACK ")", "rrggbb/rrggbbaa"},
{"foreground", 0, 0, G_OPTION_ARG_STRING, &this->fore, "Set foreground color (default: " DEFAULT_FORE ")", "rrggbb/rrggbbaa"},
{"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"},
{"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"},
{nullptr}
};
parser->add_group (entries,
"view",
"View options:",
"Options for output rendering",
this);
}
void
shape_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"list-shapers", 0, G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK, (gpointer) &list_shapers, "List available shapers and quit", nullptr},
{"shaper", 0, G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Hidden duplicate of --shapers", nullptr},
{"shapers", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Set comma-separated list of shapers to try","list"},
{"direction", 0, 0, G_OPTION_ARG_STRING, &this->direction, "Set text direction (default: auto)", "ltr/rtl/ttb/btt"},
{"language", 0, 0, G_OPTION_ARG_STRING, &this->language, "Set text language (default: $LANG)", "langstr"},
{"script", 0, 0, G_OPTION_ARG_STRING, &this->script, "Set text script (default: auto)", "ISO-15924 tag"},
{"bot", 0, 0, G_OPTION_ARG_NONE, &this->bot, "Treat text as beginning-of-paragraph", nullptr},
{"eot", 0, 0, G_OPTION_ARG_NONE, &this->eot, "Treat text as end-of-paragraph", nullptr},
{"preserve-default-ignorables",0, 0, G_OPTION_ARG_NONE, &this->preserve_default_ignorables, "Preserve Default-Ignorable characters", nullptr},
{"remove-default-ignorables",0, 0, G_OPTION_ARG_NONE, &this->remove_default_ignorables, "Remove Default-Ignorable characters", nullptr},
{"utf8-clusters", 0, 0, G_OPTION_ARG_NONE, &this->utf8_clusters, "Use UTF8 byte indices, not char indices", nullptr},
{"cluster-level", 0, 0, G_OPTION_ARG_INT, &this->cluster_level, "Cluster merging level (default: 0)", "0/1/2"},
{"normalize-glyphs",0, 0, G_OPTION_ARG_NONE, &this->normalize_glyphs, "Rearrange glyph clusters in nominal order", nullptr},
{"verify", 0, 0, G_OPTION_ARG_NONE, &this->verify, "Perform sanity checks on shaping results", nullptr},
{"num-iterations", 'n', 0, G_OPTION_ARG_INT, &this->num_iterations, "Run shaper N times (default: 1)", "N"},
{nullptr}
};
parser->add_group (entries,
"shape",
"Shape options:",
"Options for the shaping process",
this);
const gchar *features_help = "Comma-separated list of font features\n"
"\n"
" Features can be enabled or disabled, either globally or limited to\n"
" specific character ranges. The format for specifying feature settings\n"
" follows. All valid CSS font-feature-settings values other than 'normal'\n"
" and 'inherited' are also accepted, though, not documented below.\n"
"\n"
" The range indices refer to the positions between Unicode characters,\n"
" unless the --utf8-clusters is provided, in which case range indices\n"
" refer to UTF-8 byte indices. The position before the first character\n"
" is always 0.\n"
"\n"
" The format is Python-esque. Here is how it all works:\n"
"\n"
" Syntax: Value: Start: End:\n"
"\n"
" Setting value:\n"
" \"kern\" 1 0 ∞ # Turn feature on\n"
" \"+kern\" 1 0 ∞ # Turn feature on\n"
" \"-kern\" 0 0 ∞ # Turn feature off\n"
" \"kern=0\" 0 0 ∞ # Turn feature off\n"
" \"kern=1\" 1 0 ∞ # Turn feature on\n"
" \"aalt=2\" 2 0 ∞ # Choose 2nd alternate\n"
"\n"
" Setting index:\n"
" \"kern[]\" 1 0 ∞ # Turn feature on\n"
" \"kern[:]\" 1 0 ∞ # Turn feature on\n"
" \"kern[5:]\" 1 5 ∞ # Turn feature on, partial\n"
" \"kern[:5]\" 1 0 5 # Turn feature on, partial\n"
" \"kern[3:5]\" 1 3 5 # Turn feature on, range\n"
" \"kern[3]\" 1 3 3+1 # Turn feature on, single char\n"
"\n"
" Mixing it all:\n"
"\n"
" \"aalt[3:5]=2\" 2 3 5 # Turn 2nd alternate on for range";
GOptionEntry entries2[] =
{
{"features", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_features, features_help, "list"},
{nullptr}
};
parser->add_group (entries2,
"features",
"Features options:",
"Options for font features used",
this);
}
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;
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;
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
font_options_t::add_options (option_parser_t *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);
}
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"},
{"font-size", 0, default_font_size ? 0 : G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_size, font_size_text, "1/2 integers or 'upem'"},
{"font-ppem", 0, 0, 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 options:",
"Options for the font",
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 *text;
if (nullptr == 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);
}
hb_font_t *
font_options_t::get_font (void) const
{
if (font)
return font;
/* Create the blob */
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
}
blob = hb_blob_create_from_file (font_path);
if (blob == hb_blob_get_empty ())
fail (false, "No such file or directory");
/* Create the face */
hb_face_t *face = hb_face_create (blob, face_index);
hb_blob_destroy (blob);
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_face_destroy (face);
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)
{
if (text) {
if (!line) line = text;
if (line_len == (unsigned int) -1)
line_len = strlen (line);
if (!line_len) {
*len = 0;
return nullptr;
}
const char *ret = line;
const char *p = (const char *) memchr (line, '\n', 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 int bytes = strlen (buf);
if (bytes && buf[bytes - 1] == '\n') {
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 (void)
{
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;
}
static gboolean
parse_verbose (const char *name G_GNUC_UNUSED,
const char *arg G_GNUC_UNUSED,
gpointer data G_GNUC_UNUSED,
GError **error G_GNUC_UNUSED)
{
format_options_t *format_opts = (format_options_t *) data;
format_opts->show_text = format_opts->show_unicode = format_opts->show_line_num = true;
return true;
}
static gboolean
parse_ned (const char *name G_GNUC_UNUSED,
const char *arg G_GNUC_UNUSED,
gpointer data G_GNUC_UNUSED,
GError **error G_GNUC_UNUSED)
{
format_options_t *format_opts = (format_options_t *) data;
format_opts->show_clusters = format_opts->show_advances = false;
return true;
}
void
format_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"show-text", 0, 0, G_OPTION_ARG_NONE, &this->show_text, "Prefix each line of output with its corresponding input text", nullptr},
{"show-unicode", 0, 0, G_OPTION_ARG_NONE, &this->show_unicode, "Prefix each line of output with its corresponding input codepoint(s)", nullptr},
{"show-line-num", 0, 0, G_OPTION_ARG_NONE, &this->show_line_num, "Prefix each line of output with its corresponding input line number", nullptr},
{"verbose", 'v', G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_verbose, "Prefix each line of output with all of the above", nullptr},
{"no-glyph-names", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_glyph_names, "Output glyph indices instead of names", nullptr},
{"no-positions", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_positions, "Do not output glyph positions", nullptr},
{"no-advances", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_advances, "Do not output glyph advances", nullptr},
{"no-clusters", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_clusters, "Do not output cluster indices", nullptr},
{"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Output glyph extents", nullptr},
{"show-flags", 0, 0, G_OPTION_ARG_NONE, &this->show_flags, "Output glyph flags", nullptr},
{"ned", 'v', G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_ned, "No Extra Data; Do not output clusters or advances", nullptr},
{"trace", 'V', 0, G_OPTION_ARG_NONE, &this->trace, "Output interim shaping results", nullptr},
{nullptr}
};
parser->add_group (entries,
"output-syntax",
"Output syntax:\n"
" text: [<glyph name or index>=<glyph cluster index within input>@<horizontal displacement>,<vertical displacement>+<horizontal advance>,<vertical advance>|...]\n"
" json: [{\"g\": <glyph name or index>, \"ax\": <horizontal advance>, \"ay\": <vertical advance>, \"dx\": <horizontal displacement>, \"dy\": <vertical displacement>, \"cl\": <glyph cluster index within input>}, ...]\n"
"\nOutput syntax options:",
"Options for the syntax of the output",
this);
}
void
format_options_t::serialize_unicode (hb_buffer_t *buffer,
GString *gs)
{
unsigned int num_glyphs = hb_buffer_get_length (buffer);
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
g_string_append_c (gs, '<');
for (unsigned int i = 0; i < num_glyphs; i++)
{
if (i)
g_string_append_c (gs, ',');
g_string_append_printf (gs, "U+%04X", info->codepoint);
info++;
}
g_string_append_c (gs, '>');
}
void
format_options_t::serialize_glyphs (hb_buffer_t *buffer,
hb_font_t *font,
hb_buffer_serialize_format_t output_format,
hb_buffer_serialize_flags_t flags,
GString *gs)
{
g_string_append_c (gs, '[');
unsigned int num_glyphs = hb_buffer_get_length (buffer);
unsigned int start = 0;
while (start < num_glyphs)
{
char buf[1024];
unsigned int consumed;
start += hb_buffer_serialize_glyphs (buffer, start, num_glyphs,
buf, sizeof (buf), &consumed,
font, output_format, flags);
if (!consumed)
break;
g_string_append (gs, buf);
}
g_string_append_c (gs, ']');
}
void
format_options_t::serialize_line_no (unsigned int line_no,
GString *gs)
{
if (show_line_num)
g_string_append_printf (gs, "%d: ", line_no);
}
void
format_options_t::serialize_buffer_of_text (hb_buffer_t *buffer,
unsigned int line_no,
const char *text,
unsigned int text_len,
hb_font_t *font,
GString *gs)
{
if (show_text)
{
serialize_line_no (line_no, gs);
g_string_append_c (gs, '(');
g_string_append_len (gs, text, text_len);
g_string_append_c (gs, ')');
g_string_append_c (gs, '\n');
}
if (show_unicode)
{
serialize_line_no (line_no, gs);
serialize_unicode (buffer, gs);
g_string_append_c (gs, '\n');
}
}
void
format_options_t::serialize_message (unsigned int line_no,
const char *type,
const char *msg,
GString *gs)
{
serialize_line_no (line_no, gs);
g_string_append_printf (gs, "%s: %s", type, msg);
g_string_append_c (gs, '\n');
}
void
format_options_t::serialize_buffer_of_glyphs (hb_buffer_t *buffer,
unsigned int line_no,
const char *text,
unsigned int text_len,
hb_font_t *font,
hb_buffer_serialize_format_t output_format,
hb_buffer_serialize_flags_t format_flags,
GString *gs)
{
serialize_line_no (line_no, gs);
serialize_glyphs (buffer, font, output_format, format_flags, gs);
g_string_append_c (gs, '\n');
}
void
subset_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"no-hinting", 0, 0, G_OPTION_ARG_NONE, &this->drop_hints, "Whether to drop hints", nullptr},
{nullptr}
};
parser->add_group (entries,
"subset",
"Subset options:",
"Options subsetting",
this);
}