435 lines
11 KiB
C++
435 lines
11 KiB
C++
/*
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* Copyright © 2018 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): Garret Rieger, Rod Sheeter, Behdad Esfahbod
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*/
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#include "hb-subset.hh"
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#include "hb-set.hh"
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/**
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* hb_subset_input_create_or_fail:
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*
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* Creates a new subset input object.
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*
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* Return value: (transfer full): New subset input, or `NULL` if failed. Destroy
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* with hb_subset_input_destroy().
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*
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* Since: 1.8.0
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**/
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hb_subset_input_t *
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hb_subset_input_create_or_fail (void)
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{
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hb_subset_input_t *input = hb_object_create<hb_subset_input_t>();
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if (unlikely (!input))
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return nullptr;
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for (auto& set : input->sets_iter ())
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set = hb_set_create ();
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input->axes_location = hb_hashmap_create<hb_tag_t, float> ();
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if (!input->axes_location || input->in_error ())
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{
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hb_subset_input_destroy (input);
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return nullptr;
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}
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input->flags = HB_SUBSET_FLAGS_DEFAULT;
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hb_set_add_range (input->sets.name_ids, 0, 6);
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hb_set_add (input->sets.name_languages, 0x0409);
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hb_tag_t default_drop_tables[] = {
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// Layout disabled by default
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HB_TAG ('m', 'o', 'r', 'x'),
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HB_TAG ('m', 'o', 'r', 't'),
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HB_TAG ('k', 'e', 'r', 'x'),
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HB_TAG ('k', 'e', 'r', 'n'),
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// Copied from fontTools:
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HB_TAG ('B', 'A', 'S', 'E'),
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HB_TAG ('J', 'S', 'T', 'F'),
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HB_TAG ('D', 'S', 'I', 'G'),
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HB_TAG ('E', 'B', 'D', 'T'),
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HB_TAG ('E', 'B', 'L', 'C'),
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HB_TAG ('E', 'B', 'S', 'C'),
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HB_TAG ('S', 'V', 'G', ' '),
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HB_TAG ('P', 'C', 'L', 'T'),
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HB_TAG ('L', 'T', 'S', 'H'),
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// Graphite tables
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HB_TAG ('F', 'e', 'a', 't'),
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HB_TAG ('G', 'l', 'a', 't'),
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HB_TAG ('G', 'l', 'o', 'c'),
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HB_TAG ('S', 'i', 'l', 'f'),
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HB_TAG ('S', 'i', 'l', 'l'),
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};
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input->sets.drop_tables->add_array (default_drop_tables, ARRAY_LENGTH (default_drop_tables));
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hb_tag_t default_no_subset_tables[] = {
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HB_TAG ('a', 'v', 'a', 'r'),
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HB_TAG ('f', 'v', 'a', 'r'),
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HB_TAG ('g', 'a', 's', 'p'),
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HB_TAG ('c', 'v', 't', ' '),
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HB_TAG ('f', 'p', 'g', 'm'),
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HB_TAG ('p', 'r', 'e', 'p'),
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HB_TAG ('V', 'D', 'M', 'X'),
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HB_TAG ('D', 'S', 'I', 'G'),
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HB_TAG ('M', 'V', 'A', 'R'),
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HB_TAG ('c', 'v', 'a', 'r'),
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};
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input->sets.no_subset_tables->add_array (default_no_subset_tables,
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ARRAY_LENGTH (default_no_subset_tables));
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//copied from _layout_features_groups in fonttools
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hb_tag_t default_layout_features[] = {
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// default shaper
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// common
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HB_TAG ('r', 'v', 'r', 'n'),
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HB_TAG ('c', 'c', 'm', 'p'),
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HB_TAG ('l', 'i', 'g', 'a'),
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HB_TAG ('l', 'o', 'c', 'l'),
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HB_TAG ('m', 'a', 'r', 'k'),
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HB_TAG ('m', 'k', 'm', 'k'),
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HB_TAG ('r', 'l', 'i', 'g'),
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//fractions
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HB_TAG ('f', 'r', 'a', 'c'),
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HB_TAG ('n', 'u', 'm', 'r'),
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HB_TAG ('d', 'n', 'o', 'm'),
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//horizontal
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HB_TAG ('c', 'a', 'l', 't'),
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HB_TAG ('c', 'l', 'i', 'g'),
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HB_TAG ('c', 'u', 'r', 's'),
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HB_TAG ('k', 'e', 'r', 'n'),
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HB_TAG ('r', 'c', 'l', 't'),
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//vertical
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HB_TAG ('v', 'a', 'l', 't'),
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HB_TAG ('v', 'e', 'r', 't'),
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HB_TAG ('v', 'k', 'r', 'n'),
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HB_TAG ('v', 'p', 'a', 'l'),
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HB_TAG ('v', 'r', 't', '2'),
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//ltr
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HB_TAG ('l', 't', 'r', 'a'),
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HB_TAG ('l', 't', 'r', 'm'),
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//rtl
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HB_TAG ('r', 't', 'l', 'a'),
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HB_TAG ('r', 't', 'l', 'm'),
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//random
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HB_TAG ('r', 'a', 'n', 'd'),
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//justify
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HB_TAG ('j', 'a', 'l', 't'), // HarfBuzz doesn't use; others might
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//private
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HB_TAG ('H', 'a', 'r', 'f'),
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HB_TAG ('H', 'A', 'R', 'F'),
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HB_TAG ('B', 'u', 'z', 'z'),
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HB_TAG ('B', 'U', 'Z', 'Z'),
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//shapers
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//arabic
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HB_TAG ('i', 'n', 'i', 't'),
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HB_TAG ('m', 'e', 'd', 'i'),
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HB_TAG ('f', 'i', 'n', 'a'),
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HB_TAG ('i', 's', 'o', 'l'),
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HB_TAG ('m', 'e', 'd', '2'),
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HB_TAG ('f', 'i', 'n', '2'),
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HB_TAG ('f', 'i', 'n', '3'),
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HB_TAG ('c', 's', 'w', 'h'),
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HB_TAG ('m', 's', 'e', 't'),
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HB_TAG ('s', 't', 'c', 'h'),
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//hangul
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HB_TAG ('l', 'j', 'm', 'o'),
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HB_TAG ('v', 'j', 'm', 'o'),
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HB_TAG ('t', 'j', 'm', 'o'),
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//tibetan
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HB_TAG ('a', 'b', 'v', 's'),
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HB_TAG ('b', 'l', 'w', 's'),
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HB_TAG ('a', 'b', 'v', 'm'),
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HB_TAG ('b', 'l', 'w', 'm'),
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//indic
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HB_TAG ('n', 'u', 'k', 't'),
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HB_TAG ('a', 'k', 'h', 'n'),
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HB_TAG ('r', 'p', 'h', 'f'),
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HB_TAG ('r', 'k', 'r', 'f'),
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HB_TAG ('p', 'r', 'e', 'f'),
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HB_TAG ('b', 'l', 'w', 'f'),
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HB_TAG ('h', 'a', 'l', 'f'),
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HB_TAG ('a', 'b', 'v', 'f'),
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HB_TAG ('p', 's', 't', 'f'),
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HB_TAG ('c', 'f', 'a', 'r'),
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HB_TAG ('v', 'a', 't', 'u'),
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HB_TAG ('c', 'j', 'c', 't'),
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HB_TAG ('i', 'n', 'i', 't'),
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HB_TAG ('p', 'r', 'e', 's'),
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HB_TAG ('a', 'b', 'v', 's'),
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HB_TAG ('b', 'l', 'w', 's'),
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HB_TAG ('p', 's', 't', 's'),
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HB_TAG ('h', 'a', 'l', 'n'),
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HB_TAG ('d', 'i', 's', 't'),
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HB_TAG ('a', 'b', 'v', 'm'),
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HB_TAG ('b', 'l', 'w', 'm'),
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};
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input->sets.layout_features->add_array (default_layout_features, ARRAY_LENGTH (default_layout_features));
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input->sets.layout_scripts->invert (); // Default to all scripts.
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if (input->in_error ())
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{
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hb_subset_input_destroy (input);
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return nullptr;
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}
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return input;
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}
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/**
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* hb_subset_input_reference: (skip)
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* @input: a #hb_subset_input_t object.
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*
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* Increases the reference count on @input.
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*
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* Return value: @input.
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*
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* Since: 1.8.0
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**/
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hb_subset_input_t *
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hb_subset_input_reference (hb_subset_input_t *input)
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{
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return hb_object_reference (input);
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}
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/**
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* hb_subset_input_destroy:
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* @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
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* @input, freeing all memory.
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*
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* Since: 1.8.0
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**/
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void
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hb_subset_input_destroy (hb_subset_input_t *input)
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{
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if (!hb_object_destroy (input)) return;
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for (hb_set_t* set : input->sets_iter ())
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hb_set_destroy (set);
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hb_hashmap_destroy (input->axes_location);
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hb_free (input);
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}
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/**
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* hb_subset_input_unicode_set:
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* @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
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* set as needed.
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*
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* Return value: (transfer none): pointer to the #hb_set_t of Unicode code
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* points.
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*
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* Since: 1.8.0
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**/
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HB_EXTERN hb_set_t *
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hb_subset_input_unicode_set (hb_subset_input_t *input)
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{
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return input->sets.unicodes;
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}
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/**
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* hb_subset_input_glyph_set:
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* @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
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* needed.
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*
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* Return value: (transfer none): pointer to the #hb_set_t of glyph IDs.
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*
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* Since: 1.8.0
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**/
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HB_EXTERN hb_set_t *
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hb_subset_input_glyph_set (hb_subset_input_t *input)
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{
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return input->sets.glyphs;
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}
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/**
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* hb_subset_input_set:
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* @input: a #hb_subset_input_t object.
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* @set_type: a #hb_subset_sets_t set type.
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*
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* Gets the set of the specified type.
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*
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* Return value: (transfer none): pointer to the #hb_set_t of the specified type.
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*
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* Since: 2.9.1
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**/
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HB_EXTERN hb_set_t *
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hb_subset_input_set (hb_subset_input_t *input, hb_subset_sets_t set_type)
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{
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return input->sets_iter () [set_type];
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}
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/**
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* hb_subset_input_get_flags:
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* @input: a #hb_subset_input_t object.
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*
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* Gets all of the subsetting flags in the input object.
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*
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* Return value: the subsetting flags bit field.
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*
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* Since: 2.9.0
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**/
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HB_EXTERN hb_subset_flags_t
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hb_subset_input_get_flags (hb_subset_input_t *input)
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{
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return (hb_subset_flags_t) input->flags;
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}
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/**
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* hb_subset_input_set_flags:
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* @input: a #hb_subset_input_t object.
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* @value: bit field of flags
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*
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* Sets all of the flags in the input object to the values specified by the bit
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* field.
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*
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* Since: 2.9.0
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**/
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HB_EXTERN void
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hb_subset_input_set_flags (hb_subset_input_t *input,
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unsigned value)
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{
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input->flags = (hb_subset_flags_t) value;
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}
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/**
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* hb_subset_input_set_user_data: (skip)
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* @input: a #hb_subset_input_t object.
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* @key: The user-data key to set
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* @data: A pointer to the user data
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* @destroy: (nullable): A callback to call when @data is not needed anymore
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* @replace: Whether to replace an existing data with the same key
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*
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* Attaches a user-data key/data pair to the given subset input object.
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*
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* Return value: `true` if success, `false` otherwise
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*
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* Since: 2.9.0
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**/
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hb_bool_t
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hb_subset_input_set_user_data (hb_subset_input_t *input,
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hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace)
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{
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return hb_object_set_user_data (input, key, data, destroy, replace);
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}
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/**
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* hb_subset_input_get_user_data: (skip)
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* @input: a #hb_subset_input_t object.
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* @key: The user-data key to query
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*
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* Fetches the user data associated with the specified key,
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* attached to the specified subset input object.
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*
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* Return value: (transfer none): A pointer to the user data
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*
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* Since: 2.9.0
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**/
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void *
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hb_subset_input_get_user_data (const hb_subset_input_t *input,
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hb_user_data_key_t *key)
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{
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return hb_object_get_user_data (input, key);
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}
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#ifdef HB_EXPERIMENTAL_API
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#ifndef HB_NO_VAR
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/**
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* hb_subset_input_pin_axis_to_default: (skip)
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* @input: a #hb_subset_input_t object.
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* @axis_tag: Tag of the axis to be pinned
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*
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* Pin an axis to its default location in the given subset input object.
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*
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* Return value: `true` if success, `false` otherwise
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*
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* Since: REPLACEME
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**/
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hb_bool_t
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hb_subset_input_pin_axis_to_default (hb_subset_input_t *input,
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hb_face_t *face,
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hb_tag_t axis_tag)
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{
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hb_ot_var_axis_info_t axis_info;
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if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info))
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return false;
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return input->axes_location->set (axis_tag, axis_info.default_value);
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}
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/**
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* hb_subset_input_pin_axis_location: (skip)
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* @input: a #hb_subset_input_t object.
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* @axis_tag: Tag of the axis to be pinned
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* @axis_value: Location on the axis to be pinned at
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*
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* Pin an axis to a fixed location in the given subset input object.
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*
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* Return value: `true` if success, `false` otherwise
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*
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* Since: REPLACEME
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**/
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hb_bool_t
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hb_subset_input_pin_axis_location (hb_subset_input_t *input,
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hb_face_t *face,
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hb_tag_t axis_tag,
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float axis_value)
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{
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hb_ot_var_axis_info_t axis_info;
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if (!hb_ot_var_find_axis_info (face, axis_tag, &axis_info))
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return false;
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float val = hb_clamp(axis_value, axis_info.min_value, axis_info.max_value);
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return input->axes_location->set (axis_tag, val);
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}
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#endif
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#endif
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