435 lines
11 KiB
C++
435 lines
11 KiB
C++
/*
|
|
* 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"
|
|
|
|
/**
|
|
* hb_subset_input_create_or_fail:
|
|
*
|
|
* Creates a new subset input object.
|
|
*
|
|
* Return value: (transfer full): New subset input, or `NULL` if failed. Destroy
|
|
* with hb_subset_input_destroy().
|
|
*
|
|
* Since: 1.8.0
|
|
**/
|
|
hb_subset_input_t *
|
|
hb_subset_input_create_or_fail (void)
|
|
{
|
|
hb_subset_input_t *input = hb_object_create<hb_subset_input_t>();
|
|
|
|
if (unlikely (!input))
|
|
return nullptr;
|
|
|
|
for (auto& set : input->sets_iter ())
|
|
set = hb_set_create ();
|
|
|
|
input->axes_location = hb_hashmap_create<hb_tag_t, float> ();
|
|
|
|
if (!input->axes_location || input->in_error ())
|
|
{
|
|
hb_subset_input_destroy (input);
|
|
return nullptr;
|
|
}
|
|
|
|
input->flags = HB_SUBSET_FLAGS_DEFAULT;
|
|
|
|
hb_set_add_range (input->sets.name_ids, 0, 6);
|
|
hb_set_add (input->sets.name_languages, 0x0409);
|
|
|
|
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->sets.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'),
|
|
};
|
|
input->sets.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'),
|
|
|
|
//random
|
|
HB_TAG ('r', 'a', 'n', 'd'),
|
|
|
|
//justify
|
|
HB_TAG ('j', 'a', 'l', 't'), // HarfBuzz doesn't use; others might
|
|
|
|
//private
|
|
HB_TAG ('H', 'a', 'r', 'f'),
|
|
HB_TAG ('H', 'A', 'R', 'F'),
|
|
HB_TAG ('B', 'u', 'z', 'z'),
|
|
HB_TAG ('B', 'U', 'Z', 'Z'),
|
|
|
|
//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->sets.layout_features->add_array (default_layout_features, ARRAY_LENGTH (default_layout_features));
|
|
|
|
input->sets.layout_scripts->invert (); // Default to all scripts.
|
|
|
|
if (input->in_error ())
|
|
{
|
|
hb_subset_input_destroy (input);
|
|
return nullptr;
|
|
}
|
|
return input;
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_reference: (skip)
|
|
* @input: a #hb_subset_input_t object.
|
|
*
|
|
* Increases the reference count on @input.
|
|
*
|
|
* Return value: @input.
|
|
*
|
|
* Since: 1.8.0
|
|
**/
|
|
hb_subset_input_t *
|
|
hb_subset_input_reference (hb_subset_input_t *input)
|
|
{
|
|
return hb_object_reference (input);
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_destroy:
|
|
* @input: a #hb_subset_input_t object.
|
|
*
|
|
* Decreases the reference count on @input, and if it reaches zero, destroys
|
|
* @input, freeing all memory.
|
|
*
|
|
* Since: 1.8.0
|
|
**/
|
|
void
|
|
hb_subset_input_destroy (hb_subset_input_t *input)
|
|
{
|
|
if (!hb_object_destroy (input)) return;
|
|
|
|
for (hb_set_t* set : input->sets_iter ())
|
|
hb_set_destroy (set);
|
|
|
|
hb_hashmap_destroy (input->axes_location);
|
|
|
|
hb_free (input);
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_unicode_set:
|
|
* @input: a #hb_subset_input_t object.
|
|
*
|
|
* 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.
|
|
*
|
|
* Since: 1.8.0
|
|
**/
|
|
HB_EXTERN hb_set_t *
|
|
hb_subset_input_unicode_set (hb_subset_input_t *input)
|
|
{
|
|
return input->sets.unicodes;
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_glyph_set:
|
|
* @input: a #hb_subset_input_t object.
|
|
*
|
|
* 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.
|
|
*
|
|
* Since: 1.8.0
|
|
**/
|
|
HB_EXTERN hb_set_t *
|
|
hb_subset_input_glyph_set (hb_subset_input_t *input)
|
|
{
|
|
return input->sets.glyphs;
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_set:
|
|
* @input: a #hb_subset_input_t object.
|
|
* @set_type: a #hb_subset_sets_t set type.
|
|
*
|
|
* Gets the set of the specified type.
|
|
*
|
|
* Return value: (transfer none): pointer to the #hb_set_t of the specified type.
|
|
*
|
|
* Since: 2.9.1
|
|
**/
|
|
HB_EXTERN hb_set_t *
|
|
hb_subset_input_set (hb_subset_input_t *input, hb_subset_sets_t set_type)
|
|
{
|
|
return input->sets_iter () [set_type];
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_get_flags:
|
|
* @input: a #hb_subset_input_t object.
|
|
*
|
|
* Gets all of the subsetting flags in the input object.
|
|
*
|
|
* Return value: the subsetting flags bit field.
|
|
*
|
|
* Since: 2.9.0
|
|
**/
|
|
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
|
|
*
|
|
* Sets all of the flags in the input object to the values specified by the bit
|
|
* field.
|
|
*
|
|
* Since: 2.9.0
|
|
**/
|
|
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: 2.9.0
|
|
**/
|
|
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: 2.9.0
|
|
**/
|
|
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);
|
|
}
|
|
|
|
#ifdef HB_EXPERIMENTAL_API
|
|
#ifndef HB_NO_VAR
|
|
/**
|
|
* hb_subset_input_pin_axis_to_default: (skip)
|
|
* @input: a #hb_subset_input_t object.
|
|
* @axis_tag: Tag of the axis to be pinned
|
|
*
|
|
* Pin an axis to its default location in the given subset input object.
|
|
*
|
|
* Return value: `true` if success, `false` otherwise
|
|
*
|
|
* Since: EXPERIMENTAL
|
|
**/
|
|
hb_bool_t
|
|
hb_subset_input_pin_axis_to_default (hb_subset_input_t *input,
|
|
hb_face_t *face,
|
|
hb_tag_t axis_tag)
|
|
{
|
|
hb_ot_var_axis_info_t axis_info;
|
|
if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info))
|
|
return false;
|
|
|
|
return input->axes_location->set (axis_tag, axis_info.default_value);
|
|
}
|
|
|
|
/**
|
|
* hb_subset_input_pin_axis_location: (skip)
|
|
* @input: a #hb_subset_input_t object.
|
|
* @axis_tag: Tag of the axis to be pinned
|
|
* @axis_value: Location on the axis to be pinned at
|
|
*
|
|
* Pin an axis to a fixed location in the given subset input object.
|
|
*
|
|
* Return value: `true` if success, `false` otherwise
|
|
*
|
|
* Since: EXPERIMENTAL
|
|
**/
|
|
hb_bool_t
|
|
hb_subset_input_pin_axis_location (hb_subset_input_t *input,
|
|
hb_face_t *face,
|
|
hb_tag_t axis_tag,
|
|
float axis_value)
|
|
{
|
|
hb_ot_var_axis_info_t axis_info;
|
|
if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info))
|
|
return false;
|
|
|
|
float val = hb_clamp(axis_value, axis_info.min_value, axis_info.max_value);
|
|
return input->axes_location->set (axis_tag, val);
|
|
}
|
|
#endif
|
|
#endif
|