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harfbuzz/src/hb-aat-layout.cc

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/*
* Copyright © 2017 Google, Inc.
* Copyright © 2018 Ebrahim Byagowi
*
* 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): Behdad Esfahbod
*/
#include "hb.hh"
#include "hb-aat-layout.hh"
#include "hb-aat-layout-ankr-table.hh"
#include "hb-aat-layout-bsln-table.hh" // Just so we compile it; unused otherwise.
#include "hb-aat-layout-feat-table.hh"
#include "hb-aat-layout-just-table.hh" // Just so we compile it; unused otherwise.
#include "hb-aat-layout-kerx-table.hh"
#include "hb-aat-layout-morx-table.hh"
#include "hb-aat-layout-trak-table.hh"
#include "hb-aat-ltag-table.hh"
/*
* hb_aat_apply_context_t
*/
/* Note: This context is used for kerning, even without AAT, hence the condition. */
#if !defined(HB_NO_AAT) || !defined(HB_NO_OT_KERN)
AAT::hb_aat_apply_context_t::hb_aat_apply_context_t (const hb_ot_shape_plan_t *plan_,
hb_font_t *font_,
hb_buffer_t *buffer_,
hb_blob_t *blob) :
plan (plan_),
font (font_),
face (font->face),
buffer (buffer_),
sanitizer (),
ankr_table (&Null (AAT::ankr)),
gdef_table (face->table.GDEF->table),
lookup_index (0)
{
sanitizer.init (blob);
sanitizer.set_num_glyphs (face->get_num_glyphs ());
sanitizer.start_processing ();
sanitizer.set_max_ops (HB_SANITIZE_MAX_OPS_MAX);
}
AAT::hb_aat_apply_context_t::~hb_aat_apply_context_t ()
{ sanitizer.end_processing (); }
void
AAT::hb_aat_apply_context_t::set_ankr_table (const AAT::ankr *ankr_table_)
{ ankr_table = ankr_table_; }
#endif
/**
* SECTION:hb-aat-layout
* @title: hb-aat-layout
* @short_description: Apple Advanced Typography Layout
* @include: hb-aat.h
*
* Functions for querying AAT Layout features in the font face.
*
* HarfBuzz supports all of the AAT tables used to implement shaping. Other
* AAT tables and their associated features are not supported.
**/
#if !defined(HB_NO_AAT) || defined(HAVE_CORETEXT)
/* Mapping from OpenType feature tags to AAT feature names and selectors.
*
* Table data courtesy of Apple. Converted from mnemonics to integers
* when moving to this file. */
static const hb_aat_feature_mapping_t feature_mappings[] =
{
{HB_TAG ('a','f','r','c'), HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_VERTICAL_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_FRACTIONS},
{HB_TAG ('c','2','p','c'), HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_PETITE_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_UPPER_CASE},
{HB_TAG ('c','2','s','c'), HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_SMALL_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_UPPER_CASE},
{HB_TAG ('c','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_ALTERNATES_OFF},
{HB_TAG ('c','a','s','e'), HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_LAYOUT_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_LAYOUT_OFF},
{HB_TAG ('c','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_LIGATURES_OFF},
{HB_TAG ('c','p','s','p'), HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_SPACING_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CASE_SENSITIVE_SPACING_OFF},
{HB_TAG ('c','s','w','h'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_SWASH_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CONTEXTUAL_SWASH_ALTERNATES_OFF},
{HB_TAG ('d','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_RARE_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_RARE_LIGATURES_OFF},
{HB_TAG ('e','x','p','t'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_EXPERT_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('f','r','a','c'), HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DIAGONAL_FRACTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_FRACTIONS},
{HB_TAG ('f','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_MONOSPACED_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('h','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('h','i','s','t'), (hb_aat_layout_feature_type_t) 40, (hb_aat_layout_feature_selector_t) 0, (hb_aat_layout_feature_selector_t) 1},
{HB_TAG ('h','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_HORIZ_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_HORIZ_KANA_OFF},
{HB_TAG ('h','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_HISTORICAL_LIGATURES_OFF},
{HB_TAG ('h','n','g','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION, HB_AAT_LAYOUT_FEATURE_SELECTOR_HANJA_TO_HANGUL, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_TRANSLITERATION},
{HB_TAG ('h','o','j','o'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_HOJO_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('h','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('i','t','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_ITALIC_CJK_ROMAN, HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_OFF},
{HB_TAG ('j','p','0','4'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS2004_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('j','p','7','8'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1978_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('j','p','8','3'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1983_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('j','p','9','0'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_JIS1990_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('l','i','g','a'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_COMMON_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_COMMON_LIGATURES_OFF},
{HB_TAG ('l','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_UPPER_CASE_NUMBERS, (hb_aat_layout_feature_selector_t) 2},
{HB_TAG ('m','g','r','k'), HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS, HB_AAT_LAYOUT_FEATURE_SELECTOR_MATHEMATICAL_GREEK_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_MATHEMATICAL_GREEK_OFF},
{HB_TAG ('n','l','c','k'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_NLCCHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('o','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_NUMBERS, (hb_aat_layout_feature_selector_t) 2},
{HB_TAG ('o','r','d','n'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_ORDINALS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION},
{HB_TAG ('p','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('p','c','a','p'), HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_PETITE_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_LOWER_CASE},
{HB_TAG ('p','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('p','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_NUMBERS, (hb_aat_layout_feature_selector_t) 4},
{HB_TAG ('p','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('q','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_QUARTER_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('r','l','i','g'), HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES, HB_AAT_LAYOUT_FEATURE_SELECTOR_REQUIRED_LIGATURES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_REQUIRED_LIGATURES_OFF},
{HB_TAG ('r','u','b','y'), HB_AAT_LAYOUT_FEATURE_TYPE_RUBY_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_OFF},
{HB_TAG ('s','i','n','f'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SCIENTIFIC_INFERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION},
{HB_TAG ('s','m','c','p'), HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE, HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_SMALL_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_DEFAULT_LOWER_CASE},
{HB_TAG ('s','m','p','l'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_SIMPLIFIED_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('s','s','0','1'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ONE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ONE_OFF},
{HB_TAG ('s','s','0','2'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWO_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWO_OFF},
{HB_TAG ('s','s','0','3'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THREE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THREE_OFF},
{HB_TAG ('s','s','0','4'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOUR_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOUR_OFF},
{HB_TAG ('s','s','0','5'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIVE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIVE_OFF},
{HB_TAG ('s','s','0','6'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIX_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIX_OFF},
{HB_TAG ('s','s','0','7'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVEN_OFF},
{HB_TAG ('s','s','0','8'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHT_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHT_OFF},
{HB_TAG ('s','s','0','9'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINE_OFF},
{HB_TAG ('s','s','1','0'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TEN_OFF},
{HB_TAG ('s','s','1','1'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ELEVEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_ELEVEN_OFF},
{HB_TAG ('s','s','1','2'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWELVE_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWELVE_OFF},
{HB_TAG ('s','s','1','3'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THIRTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_THIRTEEN_OFF},
{HB_TAG ('s','s','1','4'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOURTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FOURTEEN_OFF},
{HB_TAG ('s','s','1','5'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIFTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_FIFTEEN_OFF},
{HB_TAG ('s','s','1','6'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIXTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SIXTEEN_OFF},
{HB_TAG ('s','s','1','7'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVENTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_SEVENTEEN_OFF},
{HB_TAG ('s','s','1','8'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHTEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_EIGHTEEN_OFF},
{HB_TAG ('s','s','1','9'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINETEEN_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_NINETEEN_OFF},
{HB_TAG ('s','s','2','0'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWENTY_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_STYLISTIC_ALT_TWENTY_OFF},
{HB_TAG ('s','u','b','s'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_INFERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION},
{HB_TAG ('s','u','p','s'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUPERIORS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NORMAL_POSITION},
{HB_TAG ('s','w','s','h'), HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES, HB_AAT_LAYOUT_FEATURE_SELECTOR_SWASH_ALTERNATES_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SWASH_ALTERNATES_OFF},
{HB_TAG ('t','i','t','l'), HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS, HB_AAT_LAYOUT_FEATURE_SELECTOR_TITLING_CAPS, HB_AAT_LAYOUT_FEATURE_SELECTOR_NO_STYLE_OPTIONS},
{HB_TAG ('t','n','a','m'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_TRADITIONAL_NAMES_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('t','n','u','m'), HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_MONOSPACED_NUMBERS, (hb_aat_layout_feature_selector_t) 4},
{HB_TAG ('t','r','a','d'), HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE, HB_AAT_LAYOUT_FEATURE_SELECTOR_TRADITIONAL_CHARACTERS, (hb_aat_layout_feature_selector_t) 16},
{HB_TAG ('t','w','i','d'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_THIRD_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('u','n','i','c'), HB_AAT_LAYOUT_FEATURE_TYPE_LETTER_CASE, (hb_aat_layout_feature_selector_t) 14, (hb_aat_layout_feature_selector_t) 15},
{HB_TAG ('v','a','l','t'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('v','e','r','t'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_OFF},
{HB_TAG ('v','h','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_HALF_WIDTH_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('v','k','n','a'), HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_VERT_KANA_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALTERNATE_VERT_KANA_OFF},
{HB_TAG ('v','p','a','l'), HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING, HB_AAT_LAYOUT_FEATURE_SELECTOR_ALT_PROPORTIONAL_TEXT, (hb_aat_layout_feature_selector_t) 7},
{HB_TAG ('v','r','t','2'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SUBSTITUTE_VERTICAL_FORMS_OFF},
{HB_TAG ('v','r','t','r'), HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION, (hb_aat_layout_feature_selector_t) 2, (hb_aat_layout_feature_selector_t) 3},
{HB_TAG ('z','e','r','o'), HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS, HB_AAT_LAYOUT_FEATURE_SELECTOR_SLASHED_ZERO_ON, HB_AAT_LAYOUT_FEATURE_SELECTOR_SLASHED_ZERO_OFF},
};
/**
* hb_aat_layout_find_feature_mapping:
* @tag: The requested #hb_tag_t feature tag
*
* Fetches the AAT feature-and-selector combination that corresponds
* to a given OpenType feature tag.
*
* Return value: the AAT features and selectors corresponding to the
* OpenType feature tag queried
*
**/
const hb_aat_feature_mapping_t *
hb_aat_layout_find_feature_mapping (hb_tag_t tag)
{
return hb_sorted_array (feature_mappings).bsearch (tag);
}
#endif
#ifndef HB_NO_AAT
/*
* mort/morx/kerx/trak
*/
void
hb_aat_layout_compile_map (const hb_aat_map_builder_t *mapper,
hb_aat_map_t *map)
{
const AAT::morx& morx = *mapper->face->table.morx;
if (morx.has_data ())
{
morx.compile_flags (mapper, map);
return;
}
const AAT::mort& mort = *mapper->face->table.mort;
if (mort.has_data ())
{
mort.compile_flags (mapper, map);
return;
}
}
/**
* hb_aat_layout_has_substitution:
* @face: #hb_face_t to work upon
*
* Tests whether the specified face includes any substitutions in the
* `morx` or `mort` tables.
*
* <note>Note: does not examine the `GSUB` table.</note>
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 2.3.0
*/
hb_bool_t
hb_aat_layout_has_substitution (hb_face_t *face)
{
return face->table.morx->has_data () ||
face->table.mort->has_data ();
}
void
hb_aat_layout_substitute (const hb_ot_shape_plan_t *plan,
hb_font_t *font,
hb_buffer_t *buffer,
const hb_feature_t *features,
unsigned num_features)
{
hb_aat_map_builder_t builder (font->face, plan->props);
for (unsigned i = 0; i < num_features; i++)
builder.add_feature (features[i]);
hb_aat_map_t map;
builder.compile (map);
hb_blob_t *morx_blob = font->face->table.morx.get_blob ();
const AAT::morx& morx = *morx_blob->as<AAT::morx> ();
if (morx.has_data ())
{
AAT::hb_aat_apply_context_t c (plan, font, buffer, morx_blob);
if (!buffer->message (font, "start table morx")) return;
morx.apply (&c, map);
(void) buffer->message (font, "end table morx");
return;
}
hb_blob_t *mort_blob = font->face->table.mort.get_blob ();
const AAT::mort& mort = *mort_blob->as<AAT::mort> ();
if (mort.has_data ())
{
AAT::hb_aat_apply_context_t c (plan, font, buffer, mort_blob);
if (!buffer->message (font, "start table mort")) return;
mort.apply (&c, map);
(void) buffer->message (font, "end table mort");
return;
}
}
void
hb_aat_layout_zero_width_deleted_glyphs (hb_buffer_t *buffer)
{
unsigned int count = buffer->len;
hb_glyph_info_t *info = buffer->info;
hb_glyph_position_t *pos = buffer->pos;
for (unsigned int i = 0; i < count; i++)
if (unlikely (info[i].codepoint == AAT::DELETED_GLYPH))
pos[i].x_advance = pos[i].y_advance = pos[i].x_offset = pos[i].y_offset = 0;
}
static bool
is_deleted_glyph (const hb_glyph_info_t *info)
{
return info->codepoint == AAT::DELETED_GLYPH;
}
void
hb_aat_layout_remove_deleted_glyphs (hb_buffer_t *buffer)
{
buffer->delete_glyphs_inplace (is_deleted_glyph);
}
/**
* hb_aat_layout_has_positioning:
* @face: #hb_face_t to work upon
*
* Tests whether the specified face includes any positioning information
* in the `kerx` table.
*
* <note>Note: does not examine the `GPOS` table.</note>
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 2.3.0
*/
hb_bool_t
hb_aat_layout_has_positioning (hb_face_t *face)
{
return face->table.kerx->has_data ();
}
void
hb_aat_layout_position (const hb_ot_shape_plan_t *plan,
hb_font_t *font,
hb_buffer_t *buffer)
{
hb_blob_t *kerx_blob = font->face->table.kerx.get_blob ();
const AAT::kerx& kerx = *kerx_blob->as<AAT::kerx> ();
AAT::hb_aat_apply_context_t c (plan, font, buffer, kerx_blob);
if (!buffer->message (font, "start table kerx")) return;
c.set_ankr_table (font->face->table.ankr.get ());
kerx.apply (&c);
(void) buffer->message (font, "end table kerx");
}
/**
* hb_aat_layout_has_tracking:
* @face:: #hb_face_t to work upon
*
* Tests whether the specified face includes any tracking information
* in the `trak` table.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 2.3.0
*/
hb_bool_t
hb_aat_layout_has_tracking (hb_face_t *face)
{
return face->table.trak->has_data ();
}
void
hb_aat_layout_track (const hb_ot_shape_plan_t *plan,
hb_font_t *font,
hb_buffer_t *buffer)
{
const AAT::trak& trak = *font->face->table.trak;
AAT::hb_aat_apply_context_t c (plan, font, buffer);
trak.apply (&c);
}
/**
* hb_aat_layout_get_feature_types:
* @face: #hb_face_t to work upon
* @start_offset: offset of the first feature type to retrieve
* @feature_count: (inout) (optional): Input = the maximum number of feature types to return;
* Output = the actual number of feature types returned (may be zero)
* @features: (out caller-allocates) (array length=feature_count): Array of feature types found
*
* Fetches a list of the AAT feature types included in the specified face.
*
* Return value: Number of all available feature types.
*
* Since: 2.2.0
*/
unsigned int
hb_aat_layout_get_feature_types (hb_face_t *face,
unsigned int start_offset,
unsigned int *feature_count, /* IN/OUT. May be NULL. */
hb_aat_layout_feature_type_t *features /* OUT. May be NULL. */)
{
return face->table.feat->get_feature_types (start_offset, feature_count, features);
}
/**
* hb_aat_layout_feature_type_get_name_id:
* @face: #hb_face_t to work upon
* @feature_type: The #hb_aat_layout_feature_type_t of the requested feature type
*
* Fetches the name identifier of the specified feature type in the face's `name` table.
*
* Return value: Name identifier of the requested feature type
*
* Since: 2.2.0
*/
hb_ot_name_id_t
hb_aat_layout_feature_type_get_name_id (hb_face_t *face,
hb_aat_layout_feature_type_t feature_type)
{
return face->table.feat->get_feature_name_id (feature_type);
}
/**
* hb_aat_layout_feature_type_get_selector_infos:
* @face: #hb_face_t to work upon
* @feature_type: The #hb_aat_layout_feature_type_t of the requested feature type
* @start_offset: offset of the first feature type to retrieve
* @selector_count: (inout) (optional): Input = the maximum number of selectors to return;
* Output = the actual number of selectors returned (may be zero)
* @selectors: (out caller-allocates) (array length=selector_count) (optional):
* A buffer pointer. The selectors available for the feature type queries.
* @default_index: (out) (optional): The index of the feature's default selector, if any
*
* Fetches a list of the selectors available for the specified feature in the given face.
*
* If upon return, @default_index is set to #HB_AAT_LAYOUT_NO_SELECTOR_INDEX, then
* the feature type is non-exclusive. Otherwise, @default_index is the index of
* the selector that is selected by default.
*
* Return value: Number of all available feature selectors
*
* Since: 2.2.0
*/
unsigned int
hb_aat_layout_feature_type_get_selector_infos (hb_face_t *face,
hb_aat_layout_feature_type_t feature_type,
unsigned int start_offset,
unsigned int *selector_count, /* IN/OUT. May be NULL. */
hb_aat_layout_feature_selector_info_t *selectors, /* OUT. May be NULL. */
unsigned int *default_index /* OUT. May be NULL. */)
{
return face->table.feat->get_selector_infos (feature_type, start_offset, selector_count, selectors, default_index);
}
#endif
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