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/*
* Copyright © 2011 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 VIEW_OPTIONS_HH
#define VIEW_OPTIONS_HH
#include "options.hh"
#define DEFAULT_MARGIN 16
#define DEFAULT_FORE "#000000"
#define DEFAULT_BACK "#FFFFFF"
struct view_options_t
{
~view_options_t ()
{
g_free (fore);
g_free (back);
g_free (custom_palette);
}
void add_options (option_parser_t *parser);
char *fore = nullptr;
char *back = nullptr;
unsigned int palette = 0;
char *custom_palette = nullptr;
double line_space = 0;
bool have_font_extents = false;
struct font_extents_t {
double ascent, descent, line_gap;
} font_extents = {0., 0., 0.};
struct margin_t {
double t, r, b, l;
} margin = {DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN};
hb_bool_t show_extents = false;
};
static gboolean
parse_font_extents (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::font_extents_t &e = view_opts->font_extents;
switch (sscanf (arg, "%lf%*[ ,]%lf%*[ ,]%lf", &e.ascent, &e.descent, &e.line_gap)) {
case 1: HB_FALLTHROUGH;
case 2: HB_FALLTHROUGH;
case 3:
view_opts->have_font_extents = true;
return true;
default:
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"%s argument should be one to three space-separated numbers",
name);
return false;
}
}
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; HB_FALLTHROUGH;
case 2: m.b = m.t; HB_FALLTHROUGH;
case 3: m.l = m.r; HB_FALLTHROUGH;
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;
}
}
void
view_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"annotate", 0, G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_NONE, &this->show_extents, "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"},
{"font-palette", 0, 0, G_OPTION_ARG_INT, &this->palette, "Set font palette (default: 0)", "index"},
{"custom-palette", 0, 0, G_OPTION_ARG_STRING, &this->custom_palette, "Custom palette", "comma-separated colors"},
{"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"},
{"font-extents", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_extents, "Set font ascent/descent/line-gap (default: auto)","one to three numbers"},
{"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"},
{"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Draw glyph extents", nullptr},
{nullptr}
};
parser->add_group (entries,
"view",
"View options:",
"Options for output rendering",
this);
}
#endif
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