300 lines
14 KiB
C++
300 lines
14 KiB
C++
/*
|
|
* Copyright © 2017 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): Behdad Esfahbod
|
|
*/
|
|
|
|
#include "hb-open-type.hh"
|
|
|
|
#include "hb-ot-face.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" // Just so we compile it; unused otherwise.
|
|
#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"
|
|
|
|
|
|
/* 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'), 11/*kFractionsType*/, 1/*kVerticalFractionsSelector*/, 0/*kNoFractionsSelector*/},
|
|
{HB_TAG ('c','2','p','c'), 38/*kUpperCaseType*/, 2/*kUpperCasePetiteCapsSelector*/, 0/*kDefaultUpperCaseSelector*/},
|
|
{HB_TAG ('c','2','s','c'), 38/*kUpperCaseType*/, 1/*kUpperCaseSmallCapsSelector*/, 0/*kDefaultUpperCaseSelector*/},
|
|
{HB_TAG ('c','a','l','t'), 36/*kContextualAlternatesType*/, 0/*kContextualAlternatesOnSelector*/, 1/*kContextualAlternatesOffSelector*/},
|
|
{HB_TAG ('c','a','s','e'), 33/*kCaseSensitiveLayoutType*/, 0/*kCaseSensitiveLayoutOnSelector*/, 1/*kCaseSensitiveLayoutOffSelector*/},
|
|
{HB_TAG ('c','l','i','g'), 1/*kLigaturesType*/, 18/*kContextualLigaturesOnSelector*/, 19/*kContextualLigaturesOffSelector*/},
|
|
{HB_TAG ('c','p','s','p'), 33/*kCaseSensitiveLayoutType*/, 2/*kCaseSensitiveSpacingOnSelector*/, 3/*kCaseSensitiveSpacingOffSelector*/},
|
|
{HB_TAG ('c','s','w','h'), 36/*kContextualAlternatesType*/, 4/*kContextualSwashAlternatesOnSelector*/, 5/*kContextualSwashAlternatesOffSelector*/},
|
|
{HB_TAG ('d','l','i','g'), 1/*kLigaturesType*/, 4/*kRareLigaturesOnSelector*/, 5/*kRareLigaturesOffSelector*/},
|
|
{HB_TAG ('e','x','p','t'), 20/*kCharacterShapeType*/, 10/*kExpertCharactersSelector*/, 16},
|
|
{HB_TAG ('f','r','a','c'), 11/*kFractionsType*/, 2/*kDiagonalFractionsSelector*/, 0/*kNoFractionsSelector*/},
|
|
{HB_TAG ('f','w','i','d'), 22/*kTextSpacingType*/, 1/*kMonospacedTextSelector*/, 7},
|
|
{HB_TAG ('h','a','l','t'), 22/*kTextSpacingType*/, 6/*kAltHalfWidthTextSelector*/, 7},
|
|
{HB_TAG ('h','i','s','t'), 1/*kLigaturesType*/, 20/*kHistoricalLigaturesOnSelector*/, 21/*kHistoricalLigaturesOffSelector*/},
|
|
{HB_TAG ('h','k','n','a'), 34/*kAlternateKanaType*/, 0/*kAlternateHorizKanaOnSelector*/, 1/*kAlternateHorizKanaOffSelector*/, },
|
|
{HB_TAG ('h','l','i','g'), 1/*kLigaturesType*/, 20/*kHistoricalLigaturesOnSelector*/, 21/*kHistoricalLigaturesOffSelector*/},
|
|
{HB_TAG ('h','n','g','l'), 23/*kTransliterationType*/, 1/*kHanjaToHangulSelector*/, 0/*kNoTransliterationSelector*/},
|
|
{HB_TAG ('h','o','j','o'), 20/*kCharacterShapeType*/, 12/*kHojoCharactersSelector*/, 16},
|
|
{HB_TAG ('h','w','i','d'), 22/*kTextSpacingType*/, 2/*kHalfWidthTextSelector*/, 7},
|
|
{HB_TAG ('i','t','a','l'), 32/*kItalicCJKRomanType*/, 2/*kCJKItalicRomanOnSelector*/, 3/*kCJKItalicRomanOffSelector*/},
|
|
{HB_TAG ('j','p','0','4'), 20/*kCharacterShapeType*/, 11/*kJIS2004CharactersSelector*/, 16},
|
|
{HB_TAG ('j','p','7','8'), 20/*kCharacterShapeType*/, 2/*kJIS1978CharactersSelector*/, 16},
|
|
{HB_TAG ('j','p','8','3'), 20/*kCharacterShapeType*/, 3/*kJIS1983CharactersSelector*/, 16},
|
|
{HB_TAG ('j','p','9','0'), 20/*kCharacterShapeType*/, 4/*kJIS1990CharactersSelector*/, 16},
|
|
{HB_TAG ('l','i','g','a'), 1/*kLigaturesType*/, 2/*kCommonLigaturesOnSelector*/, 3/*kCommonLigaturesOffSelector*/},
|
|
{HB_TAG ('l','n','u','m'), 21/*kNumberCaseType*/, 1/*kUpperCaseNumbersSelector*/, 2},
|
|
{HB_TAG ('m','g','r','k'), 15/*kMathematicalExtrasType*/, 10/*kMathematicalGreekOnSelector*/, 11/*kMathematicalGreekOffSelector*/},
|
|
{HB_TAG ('n','l','c','k'), 20/*kCharacterShapeType*/, 13/*kNLCCharactersSelector*/, 16},
|
|
{HB_TAG ('o','n','u','m'), 21/*kNumberCaseType*/, 0/*kLowerCaseNumbersSelector*/, 2},
|
|
{HB_TAG ('o','r','d','n'), 10/*kVerticalPositionType*/, 3/*kOrdinalsSelector*/, 0/*kNormalPositionSelector*/},
|
|
{HB_TAG ('p','a','l','t'), 22/*kTextSpacingType*/, 5/*kAltProportionalTextSelector*/, 7},
|
|
{HB_TAG ('p','c','a','p'), 37/*kLowerCaseType*/, 2/*kLowerCasePetiteCapsSelector*/, 0/*kDefaultLowerCaseSelector*/},
|
|
{HB_TAG ('p','k','n','a'), 22/*kTextSpacingType*/, 0/*kProportionalTextSelector*/, 7},
|
|
{HB_TAG ('p','n','u','m'), 6/*kNumberSpacingType*/, 1/*kProportionalNumbersSelector*/, 4},
|
|
{HB_TAG ('p','w','i','d'), 22/*kTextSpacingType*/, 0/*kProportionalTextSelector*/, 7},
|
|
{HB_TAG ('q','w','i','d'), 22/*kTextSpacingType*/, 4/*kQuarterWidthTextSelector*/, 7},
|
|
{HB_TAG ('r','u','b','y'), 28/*kRubyKanaType*/, 2/*kRubyKanaOnSelector*/, 3/*kRubyKanaOffSelector*/},
|
|
{HB_TAG ('s','i','n','f'), 10/*kVerticalPositionType*/, 4/*kScientificInferiorsSelector*/, 0/*kNormalPositionSelector*/},
|
|
{HB_TAG ('s','m','c','p'), 37/*kLowerCaseType*/, 1/*kLowerCaseSmallCapsSelector*/, 0/*kDefaultLowerCaseSelector*/},
|
|
{HB_TAG ('s','m','p','l'), 20/*kCharacterShapeType*/, 1/*kSimplifiedCharactersSelector*/, 16},
|
|
{HB_TAG ('s','s','0','1'), 35/*kStylisticAlternativesType*/, 2/*kStylisticAltOneOnSelector*/, 3/*kStylisticAltOneOffSelector*/},
|
|
{HB_TAG ('s','s','0','2'), 35/*kStylisticAlternativesType*/, 4/*kStylisticAltTwoOnSelector*/, 5/*kStylisticAltTwoOffSelector*/},
|
|
{HB_TAG ('s','s','0','3'), 35/*kStylisticAlternativesType*/, 6/*kStylisticAltThreeOnSelector*/, 7/*kStylisticAltThreeOffSelector*/},
|
|
{HB_TAG ('s','s','0','4'), 35/*kStylisticAlternativesType*/, 8/*kStylisticAltFourOnSelector*/, 9/*kStylisticAltFourOffSelector*/},
|
|
{HB_TAG ('s','s','0','5'), 35/*kStylisticAlternativesType*/, 10/*kStylisticAltFiveOnSelector*/, 11/*kStylisticAltFiveOffSelector*/},
|
|
{HB_TAG ('s','s','0','6'), 35/*kStylisticAlternativesType*/, 12/*kStylisticAltSixOnSelector*/, 13/*kStylisticAltSixOffSelector*/},
|
|
{HB_TAG ('s','s','0','7'), 35/*kStylisticAlternativesType*/, 14/*kStylisticAltSevenOnSelector*/, 15/*kStylisticAltSevenOffSelector*/},
|
|
{HB_TAG ('s','s','0','8'), 35/*kStylisticAlternativesType*/, 16/*kStylisticAltEightOnSelector*/, 17/*kStylisticAltEightOffSelector*/},
|
|
{HB_TAG ('s','s','0','9'), 35/*kStylisticAlternativesType*/, 18/*kStylisticAltNineOnSelector*/, 19/*kStylisticAltNineOffSelector*/},
|
|
{HB_TAG ('s','s','1','0'), 35/*kStylisticAlternativesType*/, 20/*kStylisticAltTenOnSelector*/, 21/*kStylisticAltTenOffSelector*/},
|
|
{HB_TAG ('s','s','1','1'), 35/*kStylisticAlternativesType*/, 22/*kStylisticAltElevenOnSelector*/, 23/*kStylisticAltElevenOffSelector*/},
|
|
{HB_TAG ('s','s','1','2'), 35/*kStylisticAlternativesType*/, 24/*kStylisticAltTwelveOnSelector*/, 25/*kStylisticAltTwelveOffSelector*/},
|
|
{HB_TAG ('s','s','1','3'), 35/*kStylisticAlternativesType*/, 26/*kStylisticAltThirteenOnSelector*/, 27/*kStylisticAltThirteenOffSelector*/},
|
|
{HB_TAG ('s','s','1','4'), 35/*kStylisticAlternativesType*/, 28/*kStylisticAltFourteenOnSelector*/, 29/*kStylisticAltFourteenOffSelector*/},
|
|
{HB_TAG ('s','s','1','5'), 35/*kStylisticAlternativesType*/, 30/*kStylisticAltFifteenOnSelector*/, 31/*kStylisticAltFifteenOffSelector*/},
|
|
{HB_TAG ('s','s','1','6'), 35/*kStylisticAlternativesType*/, 32/*kStylisticAltSixteenOnSelector*/, 33/*kStylisticAltSixteenOffSelector*/},
|
|
{HB_TAG ('s','s','1','7'), 35/*kStylisticAlternativesType*/, 34/*kStylisticAltSeventeenOnSelector*/, 35/*kStylisticAltSeventeenOffSelector*/},
|
|
{HB_TAG ('s','s','1','8'), 35/*kStylisticAlternativesType*/, 36/*kStylisticAltEighteenOnSelector*/, 37/*kStylisticAltEighteenOffSelector*/},
|
|
{HB_TAG ('s','s','1','9'), 35/*kStylisticAlternativesType*/, 38/*kStylisticAltNineteenOnSelector*/, 39/*kStylisticAltNineteenOffSelector*/},
|
|
{HB_TAG ('s','s','2','0'), 35/*kStylisticAlternativesType*/, 40/*kStylisticAltTwentyOnSelector*/, 41/*kStylisticAltTwentyOffSelector*/},
|
|
{HB_TAG ('s','u','b','s'), 10/*kVerticalPositionType*/, 2/*kInferiorsSelector*/, 0/*kNormalPositionSelector*/},
|
|
{HB_TAG ('s','u','p','s'), 10/*kVerticalPositionType*/, 1/*kSuperiorsSelector*/, 0/*kNormalPositionSelector*/},
|
|
{HB_TAG ('s','w','s','h'), 36/*kContextualAlternatesType*/, 2/*kSwashAlternatesOnSelector*/, 3/*kSwashAlternatesOffSelector*/},
|
|
{HB_TAG ('t','i','t','l'), 19/*kStyleOptionsType*/, 4/*kTitlingCapsSelector*/, 0/*kNoStyleOptionsSelector*/},
|
|
{HB_TAG ('t','n','a','m'), 20/*kCharacterShapeType*/, 14/*kTraditionalNamesCharactersSelector*/, 16},
|
|
{HB_TAG ('t','n','u','m'), 6/*kNumberSpacingType*/, 0/*kMonospacedNumbersSelector*/, 4},
|
|
{HB_TAG ('t','r','a','d'), 20/*kCharacterShapeType*/, 0/*kTraditionalCharactersSelector*/, 16},
|
|
{HB_TAG ('t','w','i','d'), 22/*kTextSpacingType*/, 3/*kThirdWidthTextSelector*/, 7},
|
|
{HB_TAG ('u','n','i','c'), 3/*kLetterCaseType*/, 14, 15},
|
|
{HB_TAG ('v','a','l','t'), 22/*kTextSpacingType*/, 5/*kAltProportionalTextSelector*/, 7},
|
|
{HB_TAG ('v','e','r','t'), 4/*kVerticalSubstitutionType*/, 0/*kSubstituteVerticalFormsOnSelector*/, 1/*kSubstituteVerticalFormsOffSelector*/},
|
|
{HB_TAG ('v','h','a','l'), 22/*kTextSpacingType*/, 6/*kAltHalfWidthTextSelector*/, 7},
|
|
{HB_TAG ('v','k','n','a'), 34/*kAlternateKanaType*/, 2/*kAlternateVertKanaOnSelector*/, 3/*kAlternateVertKanaOffSelector*/},
|
|
{HB_TAG ('v','p','a','l'), 22/*kTextSpacingType*/, 5/*kAltProportionalTextSelector*/, 7},
|
|
{HB_TAG ('v','r','t','2'), 4/*kVerticalSubstitutionType*/, 0/*kSubstituteVerticalFormsOnSelector*/, 1/*kSubstituteVerticalFormsOffSelector*/},
|
|
{HB_TAG ('z','e','r','o'), 14/*kTypographicExtrasType*/, 4/*kSlashedZeroOnSelector*/, 5/*kSlashedZeroOffSelector*/},
|
|
};
|
|
|
|
const hb_aat_feature_mapping_t *
|
|
hb_aat_layout_find_feature_mapping (hb_tag_t tag)
|
|
{
|
|
return (const hb_aat_feature_mapping_t *) bsearch (&tag,
|
|
feature_mappings,
|
|
ARRAY_LENGTH (feature_mappings),
|
|
sizeof (feature_mappings[0]),
|
|
hb_aat_feature_mapping_t::cmp);
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_aat_apply_context_t
|
|
*/
|
|
|
|
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)),
|
|
ankr_end (nullptr),
|
|
lookup_index (0),
|
|
debug_depth (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 (void)
|
|
{
|
|
sanitizer.end_processing ();
|
|
}
|
|
|
|
void
|
|
AAT::hb_aat_apply_context_t::set_ankr_table (const AAT::ankr *ankr_table_,
|
|
const char *ankr_end_)
|
|
{
|
|
ankr_table = ankr_table_;
|
|
ankr_end = ankr_end_;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
|
|
bool
|
|
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)
|
|
{
|
|
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);
|
|
morx.apply (&c);
|
|
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);
|
|
mort.apply (&c);
|
|
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)
|
|
{
|
|
hb_ot_layout_delete_glyphs_inplace (buffer, is_deleted_glyph);
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
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> ();
|
|
|
|
hb_blob_t *ankr_blob = font->face->table.ankr.get_blob ();;
|
|
const AAT::ankr& ankr = *font->face->table.ankr;
|
|
|
|
AAT::hb_aat_apply_context_t c (plan, font, buffer, kerx_blob);
|
|
c.set_ankr_table (&ankr, ankr_blob->data + ankr_blob->length);
|
|
kerx.apply (&c);
|
|
}
|
|
|
|
|
|
bool
|
|
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_language_t
|
|
_hb_aat_language_get (hb_face_t *face,
|
|
unsigned int i)
|
|
{
|
|
return face->table.ltag->get_language (i);
|
|
}
|