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harfbuzz/util/options.cc
Chun-wei Fan 998e8dda93 util: Fix build on Visual Studio 
Use the fallback implementation for lround() only on pre-2013 Visual
Studio, and ensure we are clear about the types of the parameters for
lround() and scalbnf(), since Visual Studio can be quite picky on
ambiguous parameter types.  Also, use g_ascii_strcasecmp() rather than
strcasecmp() as we are already using GLib for this code and we are
assured that g_ascii_strcasemp() is available.

For scalbnf() on pre-2013 Visaul Studio, a fallback implementation is
needed, but use another forced-included header for those compilers, which
will be added later.

Also use (char)27 on Visual Studio builds as '\e' is not a recognized
escape sequence, which will do the same thing.
2015-11-16 23:04:35 +08:00

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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);
}
hb_bool_t debug = false;
static gchar *
shapers_to_string (void)
{
GString *shapers = g_string_new (NULL);
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", NULL},
{"debug", 0, 0, G_OPTION_ARG_NONE, &debug, "Free all resources before exit", NULL},
{NULL}
};
g_option_context_add_main_entries (context, entries, NULL);
}
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 == NULL;
}
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 == NULL;
}
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), NULL);
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 = NULL;
if (!g_option_context_parse (context, argc, argv, &parse_error))
{
if (parse_error != NULL) {
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 G_GNUC_UNUSED)
{
shape_options_t *shape_opts = (shape_options_t *) data;
g_strfreev (shape_opts->shapers);
shape_opts->shapers = g_strsplit (arg, ",", 0);
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 = NULL;
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));
/* 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 : NULL;
}
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", NULL},
{"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"},
{NULL}
};
parser->add_group (entries,
"view",
"View options:",
"Options controlling 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", NULL},
{"shaper", 0, G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Hidden duplicate of --shapers", NULL},
{"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", NULL},
{"eot", 0, 0, G_OPTION_ARG_NONE, &this->eot, "Treat text as end-of-paragraph", NULL},
{"preserve-default-ignorables",0, 0, G_OPTION_ARG_NONE, &this->preserve_default_ignorables, "Preserve Default-Ignorable characters", NULL},
{"utf8-clusters", 0, 0, G_OPTION_ARG_NONE, &this->utf8_clusters, "Use UTF8 byte indices, not char indices", NULL},
{"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", NULL},
{"num-iterations", 0, 0, G_OPTION_ARG_INT, &this->num_iterations, "Run shaper N times (default: 1)", "N"},
{NULL}
};
parser->add_group (entries,
"shape",
"Shape options:",
"Options controlling 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"},
{NULL}
};
parser->add_group (entries2,
"features",
"Features options:",
"Options controlling 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 to four space-separated numbers",
name);
return false;
}
}
void
font_options_t::add_options (option_parser_t *parser)
{
char *text = NULL;
{
ASSERT_STATIC (ARRAY_LENGTH_CONST (supported_font_funcs) > 0);
GString *s = g_string_new (NULL);
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 numbers or 'upem'"},
{"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"},
{NULL}
};
parser->add_group (entries,
"font",
"Font options:",
"Options controlling the font",
this);
}
void
text_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"text", 0, 0, G_OPTION_ARG_STRING, &this->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"},
{"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"},
{NULL}
};
parser->add_group (entries,
"text",
"Text options:",
"Options controlling the input text",
this);
}
void
output_options_t::add_options (option_parser_t *parser)
{
const char *text;
if (NULL == 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", 0, 0, G_OPTION_ARG_STRING, &this->output_file, "Set output file-name (default: stdout)","filename"},
{"output-format", 0, 0, G_OPTION_ARG_STRING, &this->output_format, text, "format"},
{NULL}
};
parser->add_group (entries,
"output",
"Output destination & format options:",
"Options controlling the destination and form of the output",
this);
}
hb_font_t *
font_options_t::get_font (void) const
{
if (font)
return font;
hb_blob_t *blob = NULL;
/* Create the blob */
{
char *font_data;
unsigned int len = 0;
hb_destroy_func_t destroy;
void *user_data;
hb_memory_mode_t mm;
/* This is a hell of a lot of code for just reading a file! */
if (!font_file)
fail (true, "No font file set");
if (0 == strcmp (font_file, "-")) {
/* read it */
GString *gs = g_string_new (NULL);
char buf[BUFSIZ];
#if defined(_WIN32) || defined(__CYGWIN__)
setmode (fileno (stdin), _O_BINARY);
#endif
while (!feof (stdin)) {
size_t ret = fread (buf, 1, sizeof (buf), stdin);
if (ferror (stdin))
fail (false, "Failed reading font from standard input: %s",
strerror (errno));
g_string_append_len (gs, buf, ret);
}
len = gs->len;
font_data = g_string_free (gs, false);
user_data = font_data;
destroy = (hb_destroy_func_t) g_free;
mm = HB_MEMORY_MODE_WRITABLE;
} else {
GError *error = NULL;
GMappedFile *mf = g_mapped_file_new (font_file, false, &error);
if (mf) {
font_data = g_mapped_file_get_contents (mf);
len = g_mapped_file_get_length (mf);
if (len) {
destroy = (hb_destroy_func_t) g_mapped_file_unref;
user_data = (void *) mf;
mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
} else
g_mapped_file_unref (mf);
} else {
fail (false, "%s", error->message);
//g_error_free (error);
}
if (!len) {
/* GMappedFile is buggy, it doesn't fail if file isn't regular.
* Try reading.
* https://bugzilla.gnome.org/show_bug.cgi?id=659212 */
GError *error = NULL;
gsize l;
if (g_file_get_contents (font_file, &font_data, &l, &error)) {
len = l;
destroy = (hb_destroy_func_t) g_free;
user_data = (void *) font_data;
mm = HB_MEMORY_MODE_WRITABLE;
} else {
fail (false, "%s", error->message);
//g_error_free (error);
}
}
}
if (debug)
mm = HB_MEMORY_MODE_DUPLICATE;
blob = hb_blob_create (font_data, len, mm, user_data, destroy);
}
/* 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);
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);
void (*set_font_funcs) (hb_font_t *) = NULL;
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 (NULL);
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);
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 NULL;
}
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 (NULL);
}
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) ? NULL : 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;
}
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", NULL},
{"show-unicode", 0, 0, G_OPTION_ARG_NONE, &this->show_unicode, "Prefix each line of output with its corresponding input codepoint(s)", NULL},
{"show-line-num", 0, 0, G_OPTION_ARG_NONE, &this->show_line_num, "Prefix each line of output with its corresponding input line number", NULL},
{"verbose", 0, G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK, (gpointer) &parse_verbose, "Prefix each line of output with all of the above", NULL},
{"no-glyph-names", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_glyph_names, "Output glyph indices instead of names", NULL},
{"no-positions", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_positions, "Do not output glyph positions", NULL},
{"no-clusters", 0, G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &this->show_clusters, "Do not output cluster indices", NULL},
{"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Output glyph extents", NULL},
{NULL}
};
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 controlling 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, NULL);
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 *msg,
GString *gs)
{
serialize_line_no (line_no, gs);
g_string_append_printf (gs, "%s", 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');
}
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