618 lines
17 KiB
C++
618 lines
17 KiB
C++
/*
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* Copyright © 2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef FONT_OPTIONS_HH
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#define FONT_OPTIONS_HH
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#include "face-options.hh"
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#ifdef HAVE_FREETYPE
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#include <hb-ft.h>
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#endif
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#include <hb-ot.h>
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#define FONT_SIZE_UPEM 0x7FFFFFFF
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#define FONT_SIZE_NONE 0
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extern const unsigned DEFAULT_FONT_SIZE;
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extern const unsigned SUBPIXEL_BITS;
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struct font_options_t : face_options_t
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{
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~font_options_t ()
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{
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#ifndef HB_NO_VAR
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free (variations);
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#endif
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g_free (font_funcs);
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hb_font_destroy (font);
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}
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void add_options (option_parser_t *parser);
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void post_parse (GError **error);
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hb_bool_t sub_font = false;
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hb_bool_t list_features = false;
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hb_bool_t list_unicodes = false;
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hb_bool_t list_glyphs = false;
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#ifndef HB_NO_VAR
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hb_bool_t list_variations = false;
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hb_variation_t *variations = nullptr;
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unsigned int num_variations = 0;
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#endif
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int x_ppem = 0;
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int y_ppem = 0;
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double ptem = 0.;
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double slant = 0.;
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unsigned int subpixel_bits = SUBPIXEL_BITS;
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mutable double font_size_x = DEFAULT_FONT_SIZE;
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mutable double font_size_y = DEFAULT_FONT_SIZE;
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char *font_funcs = nullptr;
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int ft_load_flags = 2;
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unsigned int palette = 0;
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unsigned int named_instance = HB_FONT_NO_VAR_NAMED_INSTANCE;
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hb_font_t *font = nullptr;
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};
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static struct supported_font_funcs_t {
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char name[4];
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void (*func) (hb_font_t *);
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} supported_font_funcs[] =
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{
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{"ot", hb_ot_font_set_funcs},
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#ifdef HAVE_FREETYPE
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{"ft", hb_ft_font_set_funcs},
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#endif
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};
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static G_GNUC_NORETURN void _list_features (hb_face_t *face);
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#ifndef HB_NO_VAR
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static G_GNUC_NORETURN void _list_variations (hb_face_t *face);
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#endif
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static G_GNUC_NORETURN void _list_unicodes (hb_font_t *font);
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static G_GNUC_NORETURN void _list_glyphs (hb_font_t *font);
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void
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font_options_t::post_parse (GError **error)
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{
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assert (!font);
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font = hb_font_create (face);
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if (font_size_x == FONT_SIZE_UPEM)
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font_size_x = hb_face_get_upem (face);
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if (font_size_y == FONT_SIZE_UPEM)
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font_size_y = hb_face_get_upem (face);
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hb_font_set_ppem (font, x_ppem, y_ppem);
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hb_font_set_ptem (font, ptem);
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hb_font_set_synthetic_slant (font, slant);
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int scale_x = (int) scalbnf (font_size_x, subpixel_bits);
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int scale_y = (int) scalbnf (font_size_y, subpixel_bits);
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hb_font_set_scale (font, scale_x, scale_y);
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#ifndef HB_NO_VAR
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hb_font_set_var_named_instance (font, named_instance);
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hb_font_set_variations (font, variations, num_variations);
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#endif
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void (*set_font_funcs) (hb_font_t *) = nullptr;
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if (!font_funcs)
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{
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set_font_funcs = supported_font_funcs[0].func;
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}
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else
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{
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for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++)
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if (0 == g_ascii_strcasecmp (font_funcs, supported_font_funcs[i].name))
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{
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set_font_funcs = supported_font_funcs[i].func;
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break;
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}
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if (!set_font_funcs)
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{
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GString *s = g_string_new (nullptr);
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for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++)
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{
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if (i)
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g_string_append_c (s, '/');
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g_string_append (s, supported_font_funcs[i].name);
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}
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g_string_append_c (s, '\n');
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char *p = g_string_free (s, FALSE);
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Unknown font function implementation `%s'; supported values are: %s; default is %s",
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font_funcs,
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p,
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supported_font_funcs[0].name);
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free (p);
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return;
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}
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}
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set_font_funcs (font);
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#ifdef HAVE_FREETYPE
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hb_ft_font_set_load_flags (font, ft_load_flags);
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#endif
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if (sub_font)
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{
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hb_font_t *old_font = font;
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font = hb_font_create_sub_font (old_font);
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hb_font_set_scale (old_font, scale_x * 2, scale_y * 2);
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hb_font_destroy (old_font);
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}
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if (list_features)
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_list_features (face);
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#ifndef HB_NO_VAR
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if (list_variations)
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_list_variations (face);
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#endif
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if (list_unicodes)
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_list_unicodes (font);
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if (list_glyphs)
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_list_glyphs (font);
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}
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static G_GNUC_NORETURN void
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_list_features (hb_face_t *face)
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{
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hb_tag_t table_tags[] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS, HB_TAG_NONE};
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auto language = hb_language_get_default ();
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hb_set_t *features = hb_set_create ();
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for (unsigned int i = 0; table_tags[i]; i++)
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{
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printf ("Table: %c%c%c%c\n", HB_UNTAG (table_tags[i]));
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hb_tag_t script_array[32];
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unsigned script_count = sizeof script_array / sizeof script_array[0];
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unsigned script_offset = 0;
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do
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{
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hb_ot_layout_table_get_script_tags (face, table_tags[i],
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script_offset,
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&script_count,
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script_array);
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for (unsigned script_index = 0; script_index < script_count; script_index++)
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{
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printf (" Script: %c%c%c%c\n", HB_UNTAG (script_array[script_index]));
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hb_tag_t language_array[32];
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unsigned language_count = sizeof language_array / sizeof language_array[0];
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unsigned language_offset = 0;
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do
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{
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hb_ot_layout_script_get_language_tags (face, table_tags[i],
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script_offset + script_index,
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language_offset,
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&language_count,
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language_array);
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for (unsigned language_index = 0; language_index < language_count; language_index++)
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{
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printf (" Language: %c%c%c%c\n", HB_UNTAG (language_array[language_index]));
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}
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language_offset += language_count;
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}
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while (language_count == sizeof language_array / sizeof language_array[0]);
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}
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script_offset += script_count;
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}
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while (script_count == sizeof script_array / sizeof script_array[0]);
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hb_set_clear (features);
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hb_tag_t feature_array[32];
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unsigned feature_count = sizeof feature_array / sizeof feature_array[0];
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unsigned feature_offset = 0;
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do
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{
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hb_ot_layout_table_get_feature_tags (face, table_tags[i],
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feature_offset,
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&feature_count,
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feature_array);
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for (unsigned feature_index = 0; feature_index < feature_count; feature_index++)
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{
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if (hb_set_has (features, feature_array[feature_index]))
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continue;
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hb_set_add (features, feature_array[feature_index]);
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hb_ot_name_id_t label_id;
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hb_ot_layout_feature_get_name_ids (face,
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table_tags[i],
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feature_offset + feature_index,
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&label_id,
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nullptr,
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nullptr,
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nullptr,
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nullptr);
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char name[64];
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unsigned name_len = sizeof name;
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hb_ot_name_get_utf8 (face, label_id,
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language,
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&name_len, name);
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printf (" Feature: %c%c%c%c", HB_UNTAG (feature_array[feature_index]));
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if (*name)
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printf (" \"%s\"", name);
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printf ("\n");
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}
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feature_offset += feature_count;
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}
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while (feature_count == sizeof feature_array / sizeof feature_array[0]);
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}
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hb_set_destroy (features);
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exit (0);
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}
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#ifndef HB_NO_VAR
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static G_GNUC_NORETURN void
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_list_variations (hb_face_t *face)
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{
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hb_ot_var_axis_info_t *axes;
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unsigned count = hb_ot_var_get_axis_infos (face, 0, nullptr, nullptr);
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axes = (hb_ot_var_axis_info_t *) calloc (count, sizeof (hb_ot_var_axis_info_t));
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hb_ot_var_get_axis_infos (face, 0, &count, axes);
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auto language = hb_language_get_default ();
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bool has_hidden = false;
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printf ("Varitation axes:\n");
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printf ("Tag: Minimum Default Maximum Name\n\n");
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for (unsigned i = 0; i < count; i++)
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{
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const auto &axis = axes[i];
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if (axis.flags & HB_OT_VAR_AXIS_FLAG_HIDDEN)
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has_hidden = true;
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char name[64];
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unsigned name_len = sizeof name;
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hb_ot_name_get_utf8 (face, axis.name_id,
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language,
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&name_len, name);
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printf ("%c%c%c%c%s: %g %g %g %s\n",
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HB_UNTAG (axis.tag),
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axis.flags & HB_OT_VAR_AXIS_FLAG_HIDDEN ? "*" : "",
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(double) axis.min_value,
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(double) axis.default_value,
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(double) axis.max_value,
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name);
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}
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if (has_hidden)
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printf ("\n[*] Hidden axis\n");
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free (axes);
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axes = nullptr;
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count = hb_ot_var_get_named_instance_count (face);
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if (count)
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{
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printf ("\n\nNamed instances: \n\n");
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for (unsigned i = 0; i < count; i++)
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{
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char name[64];
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unsigned name_len = sizeof name;
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hb_ot_name_id_t name_id = hb_ot_var_named_instance_get_subfamily_name_id (face, i);
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hb_ot_name_get_utf8 (face, name_id,
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language,
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&name_len, name);
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unsigned coords_count = hb_ot_var_named_instance_get_design_coords (face, i, nullptr, nullptr);
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float* coords;
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coords = (float *) calloc (coords_count, sizeof (float));
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hb_ot_var_named_instance_get_design_coords (face, i, &coords_count, coords);
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printf ("%u. %-32s", i, name);
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for (unsigned j = 0; j < coords_count; j++)
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printf ("%g, ", (double) coords[j]);
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printf ("\n");
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free (coords);
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}
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}
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exit(0);
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}
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static gboolean
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parse_variations (const char *name G_GNUC_UNUSED,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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font_options_t *font_opts = (font_options_t *) data;
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char *s = (char *) arg;
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char *p;
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font_opts->num_variations = 0;
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g_free (font_opts->variations);
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font_opts->variations = nullptr;
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if (!*s)
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return true;
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/* count the variations first, so we can allocate memory */
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p = s;
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do {
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font_opts->num_variations++;
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p = strpbrk (p, ", ");
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if (p)
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p++;
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} while (p);
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font_opts->variations = (hb_variation_t *) calloc (font_opts->num_variations, sizeof (*font_opts->variations));
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if (!font_opts->variations)
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return false;
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/* now do the actual parsing */
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p = s;
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font_opts->num_variations = 0;
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while (p && *p) {
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char *end = strpbrk (p, ", ");
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if (hb_variation_from_string (p, end ? end - p : -1, &font_opts->variations[font_opts->num_variations]))
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font_opts->num_variations++;
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p = end ? end + 1 : nullptr;
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}
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return true;
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}
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#endif
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static G_GNUC_NORETURN void
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_list_unicodes (hb_font_t *font)
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{
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hb_face_t *face = hb_font_get_face (font);
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hb_set_t *unicodes = hb_set_create ();
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hb_map_t *cmap = hb_map_create ();
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hb_face_collect_nominal_glyph_mapping (face, cmap, unicodes);
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for (hb_codepoint_t u = HB_SET_VALUE_INVALID;
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hb_set_next (unicodes, &u);)
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{
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hb_codepoint_t gid = hb_map_get (cmap, u);
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char glyphname[64];
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if (!hb_font_get_glyph_name (font, gid,
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glyphname, sizeof glyphname))
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snprintf (glyphname, sizeof glyphname, "gid%u", gid);
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printf ("U+%04X %s\n", u, glyphname);
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}
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hb_map_destroy (cmap);
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/* List variation-selector sequences. */
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hb_set_t *vars = hb_set_create ();
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hb_face_collect_variation_selectors (face, vars);
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for (hb_codepoint_t vs = HB_SET_VALUE_INVALID;
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hb_set_next (vars, &vs);)
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{
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hb_set_clear (unicodes);
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hb_face_collect_variation_unicodes (face, vs, unicodes);
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for (hb_codepoint_t u = HB_SET_VALUE_INVALID;
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hb_set_next (unicodes, &u);)
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{
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hb_codepoint_t gid = 0;
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bool b = hb_font_get_variation_glyph (font, u, vs, &gid);
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assert (b);
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char glyphname[64];
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if (!hb_font_get_glyph_name (font, gid,
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glyphname, sizeof glyphname))
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snprintf (glyphname, sizeof glyphname, "gid%u", gid);
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printf ("U+%04X,U+%04X %s\n", vs, u, glyphname);
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}
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}
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hb_set_destroy (vars);
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hb_set_destroy (unicodes);
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exit(0);
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}
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static G_GNUC_NORETURN void
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_list_glyphs (hb_font_t *font)
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{
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hb_face_t *face = hb_font_get_face (font);
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unsigned num_glyphs = hb_face_get_glyph_count (face);
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for (hb_codepoint_t gid = 0; gid < num_glyphs; gid++)
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{
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char glyphname[64];
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if (!hb_font_get_glyph_name (font, gid,
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glyphname, sizeof glyphname))
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snprintf (glyphname, sizeof glyphname, "gid%u", gid);
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printf ("%u %s\n", gid, glyphname);
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}
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exit(0);
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}
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static gboolean
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parse_font_size (const char *name G_GNUC_UNUSED,
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const char *arg,
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gpointer data,
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GError **error G_GNUC_UNUSED)
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{
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font_options_t *font_opts = (font_options_t *) data;
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if (0 == strcmp (arg, "upem"))
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{
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font_opts->font_size_y = font_opts->font_size_x = FONT_SIZE_UPEM;
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return true;
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}
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switch (sscanf (arg, "%lf%*[ ,]%lf", &font_opts->font_size_x, &font_opts->font_size_y)) {
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case 1: font_opts->font_size_y = font_opts->font_size_x; HB_FALLTHROUGH;
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case 2: return true;
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default:
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"%s argument should be one or two space-separated numbers",
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name);
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return false;
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}
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}
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static gboolean
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parse_font_ppem (const char *name G_GNUC_UNUSED,
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const char *arg,
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gpointer data,
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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
|
|
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: %u)", 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-slant", 0, 0,
|
|
G_OPTION_ARG_DOUBLE, &this->slant, "Set synthetic slant (default: 0)", "slant ratio; eg. 0.2"},
|
|
{"font-palette", 0, 0, G_OPTION_ARG_INT, &this->palette, "Set font palette (default: 0)", "index"},
|
|
{"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"},
|
|
{"sub-font", 0, G_OPTION_FLAG_HIDDEN,
|
|
G_OPTION_ARG_NONE, &this->sub_font, "Create a sub-font (default: false)", "boolean"},
|
|
{"ft-load-flags", 0, 0, G_OPTION_ARG_INT, &this->ft_load_flags, "Set FreeType load-flags (default: 2)", "integer"},
|
|
{"list-features", 0, 0, G_OPTION_ARG_NONE, &this->list_features, "List available font features and quit", nullptr},
|
|
{"list-unicodes", 0, 0, G_OPTION_ARG_NONE, &this->list_unicodes, "List available characters in the font and quit", nullptr},
|
|
{"list-glyphs", 0, 0, G_OPTION_ARG_NONE, &this->list_glyphs, "List available glyphs in the font and quit", nullptr},
|
|
{nullptr}
|
|
};
|
|
parser->add_group (entries,
|
|
"font",
|
|
"Font-instance options:",
|
|
"Options for the font instance",
|
|
this,
|
|
false /* We add below. */);
|
|
|
|
#ifndef HB_NO_VAR
|
|
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\"";
|
|
|
|
GOptionEntry entries2[] =
|
|
{
|
|
{"list-variations", 0, 0, G_OPTION_ARG_NONE, &this->list_variations, "List available font variations and quit", nullptr},
|
|
{"named-instance", 0, 0, G_OPTION_ARG_INT, &this->named_instance, "Set named-instance index (default: none)", "index"},
|
|
{"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);
|
|
#endif
|
|
}
|
|
|
|
#endif
|