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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*
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* Creates a new subset input object.
*
* Return value: (transfer full): New subset input, or %NULL if failed. Destroy
* with hb_subset_input_destroy().
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*
* Since: 1.8.0
**/
hb_subset_input_t *
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hb_subset_input_create_or_fail (void)
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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->flags = HB_SUBSET_FLAGS_DEFAULT;
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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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* Increases the reference count on @input.
*
* Return value: @input.
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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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*
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* Decreases the reference count on @input, and if it reaches zero, destroys
* @input, freeing all memory.
*
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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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*
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* Gets the set of Unicode code points to retain, the caller should modify the
* set as needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of Unicode code
* points.
*
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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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*
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* Gets the set of glyph IDs to retain, the caller should modify the set as
* needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of glyph IDs.
*
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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.
*
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* Gets the set of name table name IDs to retain, the caller should modify the
* set as needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of name IDs.
*
* 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.
*
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* Gets the set of name table language IDs to retain, the caller should modify
* the set as needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of language IDs.
*
* 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.
*
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* Gets the set of layout feature tags to retain, the caller should modify the
* set as needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of feature tags.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_layout_features_set (hb_subset_input_t *input)
{
return input->layout_features;
}
/**
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* hb_subset_input_drop_tables_set:
* @input: a #hb_subset_input_t object.
*
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* Gets the set of table tags to drop, the caller should modify the set as
* needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of table tags.
*
* Since: REPLACE
**/
HB_EXTERN hb_set_t *
hb_subset_input_drop_tables_set (hb_subset_input_t *input)
{
return input->drop_tables;
}
/**
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* hb_subset_input_no_subset_tables_set:
* @input: a #hb_subset_input_t object.
*
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* Gets the set of table tags which specifies tables that should not be
* subsetted, the caller should modify the set as needed.
*
* Return value: (transfer none): pointer to the #hb_set_t of table tags.
*
* 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_flags:
* @input: a #hb_subset_input_t object.
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*
* Return value: the subsetting flags bit field.
*
* Since: REPLACE
**/
HB_EXTERN hb_subset_flags_t
hb_subset_input_get_flags (hb_subset_input_t *input)
{
return (hb_subset_flags_t) input->flags;
}
/**
* hb_subset_input_set_flags:
* @input: a #hb_subset_input_t object.
* @value: bit field of flags
*
* Set all of the flags in the input object to the values
* specified by the bit field.
*
* Since: REPLACE
**/
HB_EXTERN void
hb_subset_input_set_flags (hb_subset_input_t *input,
unsigned value)
{
input->flags = (hb_subset_flags_t) value;
}
/**
* 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);
}
static void set_flag_value (hb_subset_input_t *input, hb_subset_flags_t flag, hb_bool_t value)
{
hb_subset_input_set_flags (input,
value
? hb_subset_input_get_flags (input) | flag
: hb_subset_input_get_flags (input) & ~flag);
}
void
hb_subset_input_set_retain_all_features (hb_subset_input_t *subset_input,
hb_bool_t value)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_RETAIN_ALL_FEATURES,
value);
}
hb_bool_t
hb_subset_input_get_retain_all_features (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_RETAIN_ALL_FEATURES;
}
void
hb_subset_input_set_drop_hints (hb_subset_input_t *subset_input,
hb_bool_t drop_hints)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_NO_HINTING,
drop_hints);
}
hb_bool_t
hb_subset_input_get_drop_hints (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_NO_HINTING;
}
void
hb_subset_input_set_desubroutinize (hb_subset_input_t *subset_input,
hb_bool_t desubroutinize)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_DESUBROUTINIZE,
desubroutinize);
}
hb_bool_t
hb_subset_input_get_desubroutinize (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_DESUBROUTINIZE;
}
void
hb_subset_input_set_retain_gids (hb_subset_input_t *subset_input,
hb_bool_t retain_gids)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_RETAIN_GIDS,
retain_gids);
}
hb_bool_t
hb_subset_input_get_retain_gids (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_RETAIN_GIDS;
}
void
hb_subset_input_set_name_legacy (hb_subset_input_t *subset_input,
hb_bool_t name_legacy)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_NAME_LEGACY,
name_legacy);
}
hb_bool_t
hb_subset_input_get_name_legacy (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_NAME_LEGACY;
}
void
hb_subset_input_set_overlaps_flag (hb_subset_input_t *subset_input,
hb_bool_t overlaps_flag)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG,
overlaps_flag);
}
hb_bool_t
hb_subset_input_get_overlaps_flag (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG;
}
void
hb_subset_input_set_notdef_outline (hb_subset_input_t *subset_input,
hb_bool_t notdef_outline)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_NOTDEF_OUTLINE,
notdef_outline);
}
hb_bool_t
hb_subset_input_get_notdef_outline (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_NOTDEF_OUTLINE;
}
void
hb_subset_input_set_no_prune_unicode_ranges (hb_subset_input_t *subset_input,
hb_bool_t no_prune_unicode_ranges)
{
return set_flag_value (subset_input,
HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES,
no_prune_unicode_ranges);
}
hb_bool_t
hb_subset_input_get_no_prune_unicode_ranges (hb_subset_input_t *subset_input)
{
return hb_subset_input_get_flags (subset_input) & HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES;
}