harfbuzz/src/hb-subset-input.cc

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/*
* Copyright © 2018 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): Garret Rieger, Rod Sheeter, Behdad Esfahbod
*/
#include "hb-subset.hh"
#include "hb-set.hh"
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/**
* hb_subset_input_create_or_fail:
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*
* Return value: New subset input.
*
* Since: 1.8.0
**/
hb_subset_input_t *
hb_subset_input_create_or_fail ()
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{
hb_subset_input_t *input = hb_object_create<hb_subset_input_t>();
if (unlikely (!input))
return nullptr;
input->unicodes = hb_set_create ();
input->glyphs = hb_set_create ();
input->name_ids = hb_set_create ();
hb_set_add_range (input->name_ids, 0, 6);
input->name_languages = hb_set_create ();
hb_set_add (input->name_languages, 0x0409);
input->layout_features = hb_set_create ();
input->drop_tables = hb_set_create ();
input->no_subset_tables = hb_set_create ();
input->drop_hints = false;
input->desubroutinize = false;
input->retain_gids = false;
input->name_legacy = false;
input->overlaps_flag = false;
input->notdef_outline = false;
input->no_prune_unicode_ranges = false;
input->retain_all_layout_features = false;
input->passthrough_unrecognized = false;
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hb_tag_t default_drop_tables[] = {
// Layout disabled by default
HB_TAG ('m', 'o', 'r', 'x'),
HB_TAG ('m', 'o', 'r', 't'),
HB_TAG ('k', 'e', 'r', 'x'),
HB_TAG ('k', 'e', 'r', 'n'),
// Copied from fontTools:
HB_TAG ('B', 'A', 'S', 'E'),
HB_TAG ('J', 'S', 'T', 'F'),
HB_TAG ('D', 'S', 'I', 'G'),
HB_TAG ('E', 'B', 'D', 'T'),
HB_TAG ('E', 'B', 'L', 'C'),
HB_TAG ('E', 'B', 'S', 'C'),
HB_TAG ('S', 'V', 'G', ' '),
HB_TAG ('P', 'C', 'L', 'T'),
HB_TAG ('L', 'T', 'S', 'H'),
// Graphite tables
HB_TAG ('F', 'e', 'a', 't'),
HB_TAG ('G', 'l', 'a', 't'),
HB_TAG ('G', 'l', 'o', 'c'),
HB_TAG ('S', 'i', 'l', 'f'),
HB_TAG ('S', 'i', 'l', 'l'),
};
input->drop_tables->add_array (default_drop_tables, ARRAY_LENGTH (default_drop_tables));
hb_tag_t default_no_subset_tables[] = {
HB_TAG ('a', 'v', 'a', 'r'),
HB_TAG ('f', 'v', 'a', 'r'),
HB_TAG ('g', 'a', 's', 'p'),
HB_TAG ('c', 'v', 't', ' '),
HB_TAG ('f', 'p', 'g', 'm'),
HB_TAG ('p', 'r', 'e', 'p'),
HB_TAG ('V', 'D', 'M', 'X'),
HB_TAG ('D', 'S', 'I', 'G'),
HB_TAG ('M', 'V', 'A', 'R'),
HB_TAG ('c', 'v', 'a', 'r'),
HB_TAG ('S', 'T', 'A', 'T'),
};
input->no_subset_tables->add_array (default_no_subset_tables,
ARRAY_LENGTH (default_no_subset_tables));
//copied from _layout_features_groups in fonttools
hb_tag_t default_layout_features[] = {
// default shaper
// common
HB_TAG ('r', 'v', 'r', 'n'),
HB_TAG ('c', 'c', 'm', 'p'),
HB_TAG ('l', 'i', 'g', 'a'),
HB_TAG ('l', 'o', 'c', 'l'),
HB_TAG ('m', 'a', 'r', 'k'),
HB_TAG ('m', 'k', 'm', 'k'),
HB_TAG ('r', 'l', 'i', 'g'),
//fractions
HB_TAG ('f', 'r', 'a', 'c'),
HB_TAG ('n', 'u', 'm', 'r'),
HB_TAG ('d', 'n', 'o', 'm'),
//horizontal
HB_TAG ('c', 'a', 'l', 't'),
HB_TAG ('c', 'l', 'i', 'g'),
HB_TAG ('c', 'u', 'r', 's'),
HB_TAG ('k', 'e', 'r', 'n'),
HB_TAG ('r', 'c', 'l', 't'),
//vertical
HB_TAG ('v', 'a', 'l', 't'),
HB_TAG ('v', 'e', 'r', 't'),
HB_TAG ('v', 'k', 'r', 'n'),
HB_TAG ('v', 'p', 'a', 'l'),
HB_TAG ('v', 'r', 't', '2'),
//ltr
HB_TAG ('l', 't', 'r', 'a'),
HB_TAG ('l', 't', 'r', 'm'),
//rtl
HB_TAG ('r', 't', 'l', 'a'),
HB_TAG ('r', 't', 'l', 'm'),
//Complex shapers
//arabic
HB_TAG ('i', 'n', 'i', 't'),
HB_TAG ('m', 'e', 'd', 'i'),
HB_TAG ('f', 'i', 'n', 'a'),
HB_TAG ('i', 's', 'o', 'l'),
HB_TAG ('m', 'e', 'd', '2'),
HB_TAG ('f', 'i', 'n', '2'),
HB_TAG ('f', 'i', 'n', '3'),
HB_TAG ('c', 's', 'w', 'h'),
HB_TAG ('m', 's', 'e', 't'),
HB_TAG ('s', 't', 'c', 'h'),
//hangul
HB_TAG ('l', 'j', 'm', 'o'),
HB_TAG ('v', 'j', 'm', 'o'),
HB_TAG ('t', 'j', 'm', 'o'),
//tibetan
HB_TAG ('a', 'b', 'v', 's'),
HB_TAG ('b', 'l', 'w', 's'),
HB_TAG ('a', 'b', 'v', 'm'),
HB_TAG ('b', 'l', 'w', 'm'),
//indic
HB_TAG ('n', 'u', 'k', 't'),
HB_TAG ('a', 'k', 'h', 'n'),
HB_TAG ('r', 'p', 'h', 'f'),
HB_TAG ('r', 'k', 'r', 'f'),
HB_TAG ('p', 'r', 'e', 'f'),
HB_TAG ('b', 'l', 'w', 'f'),
HB_TAG ('h', 'a', 'l', 'f'),
HB_TAG ('a', 'b', 'v', 'f'),
HB_TAG ('p', 's', 't', 'f'),
HB_TAG ('c', 'f', 'a', 'r'),
HB_TAG ('v', 'a', 't', 'u'),
HB_TAG ('c', 'j', 'c', 't'),
HB_TAG ('i', 'n', 'i', 't'),
HB_TAG ('p', 'r', 'e', 's'),
HB_TAG ('a', 'b', 'v', 's'),
HB_TAG ('b', 'l', 'w', 's'),
HB_TAG ('p', 's', 't', 's'),
HB_TAG ('h', 'a', 'l', 'n'),
HB_TAG ('d', 'i', 's', 't'),
HB_TAG ('a', 'b', 'v', 'm'),
HB_TAG ('b', 'l', 'w', 'm'),
};
input->layout_features->add_array (default_layout_features, ARRAY_LENGTH (default_layout_features));
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return input;
}
/**
* hb_subset_input_reference: (skip)
* @input: a #hb_subset_input_t object.
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*
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* Return value:
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*
* Since: 1.8.0
**/
hb_subset_input_t *
hb_subset_input_reference (hb_subset_input_t *input)
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{
return hb_object_reference (input);
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}
/**
* hb_subset_input_destroy:
* @input: a #hb_subset_input_t object.
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*
* Since: 1.8.0
**/
void
hb_subset_input_destroy (hb_subset_input_t *input)
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{
if (!hb_object_destroy (input)) return;
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hb_set_destroy (input->unicodes);
hb_set_destroy (input->glyphs);
hb_set_destroy (input->name_ids);
hb_set_destroy (input->name_languages);
hb_set_destroy (input->drop_tables);
hb_set_destroy (input->layout_features);
hb_set_destroy (input->no_subset_tables);
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hb_free (input);
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}
/**
* hb_subset_input_unicode_set:
* @input: a #hb_subset_input_t object.
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*
* Return value: pointer to the set of unicode codepoints to retain.
*
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* Since: 1.8.0
**/
HB_EXTERN hb_set_t *
hb_subset_input_unicode_set (hb_subset_input_t *input)
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{
return input->unicodes;
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}
/**
* hb_subset_input_glyph_set:
* @input: a #hb_subset_input_t object.
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*
* Return value: pointer to the set of glyph ids to retain.
*
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* Since: 1.8.0
**/
HB_EXTERN hb_set_t *
hb_subset_input_glyph_set (hb_subset_input_t *input)
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{
return input->glyphs;
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}
/**
* hb_subset_input_nameid_set:
* @input: a #hb_subset_input_t object.
*
* Return value: pointer to the set of name ids to retain.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_nameid_set (hb_subset_input_t *input)
{
return input->name_ids;
}
/**
* hb_subset_input_namelangid_set:
* @input: a #hb_subset_input_t object.
*
* Return value: pointer to the set of name language ids to retain.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_namelangid_set (hb_subset_input_t *input)
{
return input->name_languages;
}
/**
* hb_subset_input_layout_features_set:
* @input: a #hb_subset_input_t object.
*
* Return value: pointer to the set of feature tags to retain.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_layout_features_set (hb_subset_input_t *input)
{
return input->layout_features;
}
HB_EXTERN void
hb_subset_input_set_retain_all_features (hb_subset_input_t *input,
hb_bool_t value)
{
input->retain_all_layout_features = value;
}
HB_EXTERN hb_bool_t
hb_subset_input_get_retain_all_features (hb_subset_input_t *input)
{
return input->retain_all_layout_features;
}
/**
* hb_subset_input_drop_tabes_set:
* @input: a #hb_subset_input_t object.
*
* Return value: pointer to the set of table tags which specifies tables
* to be dropped.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_drop_tables_set (hb_subset_input_t *input)
{
return input->drop_tables;
}
/**
* hb_subset_input_no_subset_tabes_set:
* @input: a #hb_subset_input_t object.
*
* Return value: pointer to the set of table tags which specifies tables
* that should not have subsetting applied to them.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_no_subset_tables_set (hb_subset_input_t *input)
{
return input->no_subset_tables;
}
/**
* hb_subset_input_get_flag:
* @input: a #hb_subset_input_t object.
* @flag: which flag to check.
*
* Return value: value of the specified flag.
*
* Since: REPLACE
**/
HB_EXTERN hb_bool_t
hb_subset_input_get_flag (hb_subset_input_t *input,
hb_subset_flag_t flag)
{
switch (flag)
{
case HB_SUBSET_FLAG_HINTING:
return !input->drop_hints;
case HB_SUBSET_FLAG_RETAIN_GIDS:
return input->retain_gids;
case HB_SUBSET_FLAG_DESUBROUTINIZE:
return input->desubroutinize;
case HB_SUBSET_FLAG_NAME_LEGACY:
return input->name_legacy;
case HB_SUBSET_FLAG_SET_OVERLAPS_FLAG:
return input->overlaps_flag;
case HB_SUBSET_FLAG_PASSTHROUGH_UNRECOGNIZED:
return input->passthrough_unrecognized;
case HB_SUBSET_FLAG_NOTDEF_OUTLINE:
return input->notdef_outline;
case HB_SUBSET_FLAG_NO_PRUNE_UNICODE_RANGES:
return input->no_prune_unicode_ranges;
default:
return false;
}
}
/**
* hb_subset_input_set_flag:
* @input: a #hb_subset_input_t object.
* @flag: which flag to set.
* @value: new value for the flag.
*
* Set the specified flag to @value.
*
* Since: REPLACE
**/
HB_EXTERN void
hb_subset_input_set_flag (hb_subset_input_t *input,
hb_subset_flag_t flag,
hb_bool_t value)
{
switch (flag)
{
case HB_SUBSET_FLAG_HINTING:
input->drop_hints = !value;
break;
case HB_SUBSET_FLAG_RETAIN_GIDS:
input->retain_gids = value;
break;
case HB_SUBSET_FLAG_DESUBROUTINIZE:
input->desubroutinize = value;
break;
case HB_SUBSET_FLAG_NAME_LEGACY:
input->name_legacy = value;
break;
case HB_SUBSET_FLAG_SET_OVERLAPS_FLAG:
input->overlaps_flag = value;
break;
case HB_SUBSET_FLAG_PASSTHROUGH_UNRECOGNIZED:
input->passthrough_unrecognized = value;
break;
case HB_SUBSET_FLAG_NOTDEF_OUTLINE:
input->notdef_outline = value;
break;
case HB_SUBSET_FLAG_NO_PRUNE_UNICODE_RANGES:
input->no_prune_unicode_ranges = value;
break;
default:
// Do nothing.
break;
}
}
/**
* hb_subset_input_set_user_data: (skip)
* @input: a #hb_subset_input_t object.
* @key: The user-data key to set
* @data: A pointer to the user data
* @destroy: (nullable): A callback to call when @data is not needed anymore
* @replace: Whether to replace an existing data with the same key
*
* Attaches a user-data key/data pair to the given subset input object.
*
* Return value: %true if success, %false otherwise
*
* Since: REPLACE
**/
hb_bool_t
hb_subset_input_set_user_data (hb_subset_input_t *input,
hb_user_data_key_t *key,
void * data,
hb_destroy_func_t destroy,
hb_bool_t replace)
{
return hb_object_set_user_data (input, key, data, destroy, replace);
}
/**
* hb_subset_input_get_user_data: (skip)
* @input: a #hb_subset_input_t object.
* @key: The user-data key to query
*
* Fetches the user data associated with the specified key,
* attached to the specified subset input object.
*
* Return value: (transfer none): A pointer to the user data
*
* Since: REPLACE
**/
void *
hb_subset_input_get_user_data (const hb_subset_input_t *input,
hb_user_data_key_t *key)
{
return hb_object_get_user_data (input, key);
}