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[var] Flesh out --variations documentation

This commit is contained in:
Behdad Esfahbod 2017-01-22 19:01:07 -08:00
parent 5ec96d30ca
commit a429090572
1 changed files with 14 additions and 39 deletions
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53
util/options.cc
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@ -311,7 +311,7 @@ view_options_t::add_options (option_parser_t *parser)
parser->add_group (entries,
"view",
"View options:",
"Options controlling output rendering",
"Options for output rendering",
this);
}
@ -340,7 +340,7 @@ shape_options_t::add_options (option_parser_t *parser)
parser->add_group (entries,
"shape",
"Shape options:",
"Options controlling the shaping process",
"Options for the shaping process",
this);
const gchar *features_help = "Comma-separated list of font features\n"
@ -387,7 +387,7 @@ shape_options_t::add_options (option_parser_t *parser)
parser->add_group (entries2,
"features",
"Features options:",
"Options controlling font features used",
"Options for font features used",
this);
}
@ -454,45 +454,20 @@ font_options_t::add_options (option_parser_t *parser)
parser->add_group (entries,
"font",
"Font options:",
"Options controlling the font",
"Options for the font",
this);
const gchar *variations_help = "Comma-separated list of font variations\n"
"\n"
" XXXXXXXXXXXXXXX\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"
" 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 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"
" The format is a tag, optionally followed by an equals sign, followed by a\n"
" number. For example:\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";
" \"wght=500\"\n"
" \"slnt=-7.5\"\n";
GOptionEntry entries2[] =
{
@ -502,7 +477,7 @@ font_options_t::add_options (option_parser_t *parser)
parser->add_group (entries2,
"variations",
"Varitions options:",
"Options controlling font variations used",
"Options for font variations used",
this);
}
@ -520,7 +495,7 @@ text_options_t::add_options (option_parser_t *parser)
parser->add_group (entries,
"text",
"Text options:",
"Options controlling the input text",
"Options for the input text",
this);
}
@ -548,7 +523,7 @@ output_options_t::add_options (option_parser_t *parser)
parser->add_group (entries,
"output",
"Output destination & format options:",
"Options controlling the destination and form of the output",
"Options for the destination & form of the output",
this);
}
@ -810,7 +785,7 @@ format_options_t::add_options (option_parser_t *parser)
" 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",
"Options for the syntax of the output",
this);
}