1440 lines
45 KiB
C++
1440 lines
45 KiB
C++
/*
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* Copyright © 1998-2004 David Turner and Werner Lemberg
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* Copyright © 2006 Behdad Esfahbod
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* Copyright © 2007,2008,2009 Red Hat, Inc.
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* Copyright © 2012,2013 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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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb-open-type-private.hh"
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#include "hb-ot-layout-private.hh"
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#include "hb-ot-map-private.hh"
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#include "hb-ot-layout-gdef-table.hh"
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#include "hb-ot-layout-gsub-table.hh"
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#include "hb-ot-layout-gpos-table.hh"
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// Just so we compile them; unused otherwise:
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#include "hb-ot-layout-base-table.hh"
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#include "hb-ot-layout-jstf-table.hh"
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#include "hb-ot-color-colr-table.hh"
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#include "hb-ot-color-cpal-table.hh"
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#include "hb-ot-color-sbix-table.hh"
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#include "hb-ot-color-svg-table.hh"
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#include "hb-ot-name-table.hh"
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#include "hb-map-private.hh"
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hb_ot_layout_t *
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_hb_ot_layout_create (hb_face_t *face)
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{
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hb_ot_layout_t *layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
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if (unlikely (!layout))
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return nullptr;
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layout->gdef_blob = OT::hb_sanitize_context_t().reference_table<OT::GDEF> (face);
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layout->gdef = layout->gdef_blob->as<OT::GDEF> ();
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layout->gsub_blob = OT::hb_sanitize_context_t().reference_table<OT::GSUB> (face);
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layout->gsub = layout->gsub_blob->as<OT::GSUB> ();
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layout->gpos_blob = OT::hb_sanitize_context_t().reference_table<OT::GPOS> (face);
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layout->gpos = layout->gpos_blob->as<OT::GPOS> ();
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layout->math.init (face);
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layout->fvar.init (face);
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layout->avar.init (face);
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layout->morx.init (face);
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{
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/*
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* The ugly business of blacklisting individual fonts' tables happen here!
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* See this thread for why we finally had to bend in and do this:
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* https://lists.freedesktop.org/archives/harfbuzz/2016-February/005489.html
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*/
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unsigned int gdef_len = layout->gdef_blob->length;
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unsigned int gsub_len = layout->gsub_blob->length;
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unsigned int gpos_len = layout->gpos_blob->length;
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if (0
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/* sha1sum:c5ee92f0bca4bfb7d06c4d03e8cf9f9cf75d2e8a Windows 7? timesi.ttf */
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|| (442 == gdef_len && 42038 == gpos_len && 2874 == gsub_len)
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/* sha1sum:37fc8c16a0894ab7b749e35579856c73c840867b Windows 7? timesbi.ttf */
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|| (430 == gdef_len && 40662 == gpos_len && 2874 == gsub_len)
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/* sha1sum:19fc45110ea6cd3cdd0a5faca256a3797a069a80 Windows 7 timesi.ttf */
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|| (442 == gdef_len && 39116 == gpos_len && 2874 == gsub_len)
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/* sha1sum:6d2d3c9ed5b7de87bc84eae0df95ee5232ecde26 Windows 7 timesbi.ttf */
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|| (430 == gdef_len && 39374 == gpos_len && 2874 == gsub_len)
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/* sha1sum:8583225a8b49667c077b3525333f84af08c6bcd8 OS X 10.11.3 Times New Roman Italic.ttf */
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|| (490 == gdef_len && 41638 == gpos_len && 3046 == gsub_len)
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/* sha1sum:ec0f5a8751845355b7c3271d11f9918a966cb8c9 OS X 10.11.3 Times New Roman Bold Italic.ttf */
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|| (478 == gdef_len && 41902 == gpos_len && 3046 == gsub_len)
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)
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{
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/* In certain versions of Times New Roman Italic and Bold Italic,
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* ASCII double quotation mark U+0022, mapped to glyph 5, has wrong
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* glyph class 3 (mark) in GDEF. Nuke the GDEF to avoid zero-width
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* double-quote. See:
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* https://lists.freedesktop.org/archives/harfbuzz/2016-February/005489.html
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*/
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if (3 == layout->gdef->get_glyph_class (5))
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layout->gdef = &Null(OT::GDEF);
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}
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else if (0
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/* sha1sum:96eda93f7d33e79962451c6c39a6b51ee893ce8c tahoma.ttf from Windows 8 */
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|| (898 == gdef_len && 46470 == gpos_len && 12554 == gsub_len)
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||
/* sha1sum:20928dc06014e0cd120b6fc942d0c3b1a46ac2bc tahomabd.ttf from Windows 8 */
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||
|| (910 == gdef_len && 47732 == gpos_len && 12566 == gsub_len)
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/* sha1sum:4f95b7e4878f60fa3a39ca269618dfde9721a79e tahoma.ttf from Windows 8.1 */
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|| (928 == gdef_len && 59332 == gpos_len && 23298 == gsub_len)
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/* sha1sum:6d400781948517c3c0441ba42acb309584b73033 tahomabd.ttf from Windows 8.1 */
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||
|| (940 == gdef_len && 60732 == gpos_len && 23310 == gsub_len)
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/* tahoma.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
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|| (964 == gdef_len && 60072 == gpos_len && 23836 == gsub_len)
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/* tahomabd.ttf v6.04 from Windows 8.1 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
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|| (976 == gdef_len && 61456 == gpos_len && 23832 == gsub_len)
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/* sha1sum:e55fa2dfe957a9f7ec26be516a0e30b0c925f846 tahoma.ttf from Windows 10 */
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|| (994 == gdef_len && 60336 == gpos_len && 24474 == gsub_len)
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/* sha1sum:7199385abb4c2cc81c83a151a7599b6368e92343 tahomabd.ttf from Windows 10 */
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||
|| (1006 == gdef_len && 61740 == gpos_len && 24470 == gsub_len)
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/* tahoma.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
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|| (1006 == gdef_len && 61346 == gpos_len && 24576 == gsub_len)
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/* tahomabd.ttf v6.91 from Windows 10 x64, see https://bugzilla.mozilla.org/show_bug.cgi?id=1279925 */
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|| (1018 == gdef_len && 62828 == gpos_len && 24572 == gsub_len)
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/* sha1sum:b9c84d820c49850d3d27ec498be93955b82772b5 tahoma.ttf from Windows 10 AU */
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||
|| (1006 == gdef_len && 61352 == gpos_len && 24576 == gsub_len)
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/* sha1sum:2bdfaab28174bdadd2f3d4200a30a7ae31db79d2 tahomabd.ttf from Windows 10 AU */
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|| (1018 == gdef_len && 62834 == gpos_len && 24572 == gsub_len)
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/* sha1sum:b0d36cf5a2fbe746a3dd277bffc6756a820807a7 Tahoma.ttf from Mac OS X 10.9 */
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||
|| (832 == gdef_len && 47162 == gpos_len && 7324 == gsub_len)
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/* sha1sum:12fc4538e84d461771b30c18b5eb6bd434e30fba Tahoma Bold.ttf from Mac OS X 10.9 */
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|| (844 == gdef_len && 45474 == gpos_len && 7302 == gsub_len)
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/* sha1sum:eb8afadd28e9cf963e886b23a30b44ab4fd83acc himalaya.ttf from Windows 7 */
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||
|| (180 == gdef_len && 7254 == gpos_len && 13054 == gsub_len)
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/* sha1sum:73da7f025b238a3f737aa1fde22577a6370f77b0 himalaya.ttf from Windows 8 */
|
||
|| (192 == gdef_len && 7254 == gpos_len && 12638 == gsub_len)
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/* sha1sum:6e80fd1c0b059bbee49272401583160dc1e6a427 himalaya.ttf from Windows 8.1 */
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||
|| (192 == gdef_len && 7254 == gpos_len && 12690 == gsub_len)
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/* 8d9267aea9cd2c852ecfb9f12a6e834bfaeafe44 cantarell-fonts-0.0.21/otf/Cantarell-Regular.otf */
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/* 983988ff7b47439ab79aeaf9a45bd4a2c5b9d371 cantarell-fonts-0.0.21/otf/Cantarell-Oblique.otf */
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||
|| (188 == gdef_len && 3852 == gpos_len && 248 == gsub_len)
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/* 2c0c90c6f6087ffbfea76589c93113a9cbb0e75f cantarell-fonts-0.0.21/otf/Cantarell-Bold.otf */
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/* 55461f5b853c6da88069ffcdf7f4dd3f8d7e3e6b cantarell-fonts-0.0.21/otf/Cantarell-Bold-Oblique.otf */
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|| (188 == gdef_len && 3426 == gpos_len && 264 == gsub_len)
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/* d125afa82a77a6475ac0e74e7c207914af84b37a padauk-2.80/Padauk.ttf RHEL 7.2 */
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||
|| (1058 == gdef_len && 11818 == gpos_len && 47032 == gsub_len)
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/* 0f7b80437227b90a577cc078c0216160ae61b031 padauk-2.80/Padauk-Bold.ttf RHEL 7.2*/
|
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|| (1046 == gdef_len && 12600 == gpos_len && 47030 == gsub_len)
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/* d3dde9aa0a6b7f8f6a89ef1002e9aaa11b882290 padauk-2.80/Padauk.ttf Ubuntu 16.04 */
|
||
|| (1058 == gdef_len && 16770 == gpos_len && 71796 == gsub_len)
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/* 5f3c98ccccae8a953be2d122c1b3a77fd805093f padauk-2.80/Padauk-Bold.ttf Ubuntu 16.04 */
|
||
|| (1046 == gdef_len && 17862 == gpos_len && 71790 == gsub_len)
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/* 6c93b63b64e8b2c93f5e824e78caca555dc887c7 padauk-2.80/Padauk-book.ttf */
|
||
|| (1046 == gdef_len && 17112 == gpos_len && 71788 == gsub_len)
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/* d89b1664058359b8ec82e35d3531931125991fb9 padauk-2.80/Padauk-bookbold.ttf */
|
||
|| (1058 == gdef_len && 17514 == gpos_len && 71794 == gsub_len)
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/* 824cfd193aaf6234b2b4dc0cf3c6ef576c0d00ef padauk-3.0/Padauk-book.ttf */
|
||
|| (1330 == gdef_len && 57938 == gpos_len && 109904 == gsub_len)
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/* 91fcc10cf15e012d27571e075b3b4dfe31754a8a padauk-3.0/Padauk-bookbold.ttf */
|
||
|| (1330 == gdef_len && 58972 == gpos_len && 109904 == gsub_len)
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/* sha1sum: c26e41d567ed821bed997e937bc0c41435689e85 Padauk.ttf
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* "Padauk Regular" "Version 2.5", see https://crbug.com/681813 */
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|| (1004 == gdef_len && 14836 == gpos_len && 59092 == gsub_len)
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)
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{
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/* Many versions of Tahoma have bad GDEF tables that incorrectly classify some spacing marks
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* such as certain IPA symbols as glyph class 3. So do older versions of Microsoft Himalaya,
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* and the version of Cantarell shipped by Ubuntu 16.04.
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* Nuke the GDEF tables of these fonts to avoid unwanted width-zeroing.
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* See https://bugzilla.mozilla.org/show_bug.cgi?id=1279925
|
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* https://bugzilla.mozilla.org/show_bug.cgi?id=1279693
|
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* https://bugzilla.mozilla.org/show_bug.cgi?id=1279875
|
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*/
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layout->gdef = &Null(OT::GDEF);
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}
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}
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layout->gsub_lookup_count = layout->gsub->get_lookup_count ();
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layout->gpos_lookup_count = layout->gpos->get_lookup_count ();
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layout->gsub_accels = (hb_ot_layout_lookup_accelerator_t *) calloc (layout->gsub->get_lookup_count (), sizeof (hb_ot_layout_lookup_accelerator_t));
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layout->gpos_accels = (hb_ot_layout_lookup_accelerator_t *) calloc (layout->gpos->get_lookup_count (), sizeof (hb_ot_layout_lookup_accelerator_t));
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if (unlikely ((layout->gsub_lookup_count && !layout->gsub_accels) ||
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(layout->gpos_lookup_count && !layout->gpos_accels)))
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{
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_hb_ot_layout_destroy (layout);
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return nullptr;
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}
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for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
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layout->gsub_accels[i].init (layout->gsub->get_lookup (i));
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for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
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layout->gpos_accels[i].init (layout->gpos->get_lookup (i));
|
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|
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return layout;
|
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}
|
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|
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void
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_hb_ot_layout_destroy (hb_ot_layout_t *layout)
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{
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if (layout->gsub_accels)
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for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
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layout->gsub_accels[i].fini ();
|
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if (layout->gpos_accels)
|
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for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
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layout->gpos_accels[i].fini ();
|
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|
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free (layout->gsub_accels);
|
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free (layout->gpos_accels);
|
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|
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hb_blob_destroy (layout->gdef_blob);
|
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hb_blob_destroy (layout->gsub_blob);
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hb_blob_destroy (layout->gpos_blob);
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|
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layout->math.fini ();
|
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layout->fvar.fini ();
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layout->avar.fini ();
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layout->morx.fini ();
|
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|
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free (layout);
|
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}
|
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|
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// static inline const OT::BASE&
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// _get_base (hb_face_t *face)
|
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// {
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// if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::BASE);
|
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// hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
|
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// return *(layout->base.get ());
|
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// }
|
||
|
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static inline const OT::GDEF&
|
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_get_gdef (hb_face_t *face)
|
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{
|
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::GDEF);
|
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return *hb_ot_layout_from_face (face)->gdef;
|
||
}
|
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static inline const OT::GSUB&
|
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_get_gsub (hb_face_t *face)
|
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{
|
||
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::GSUB);
|
||
return *hb_ot_layout_from_face (face)->gsub;
|
||
}
|
||
static inline const OT::GPOS&
|
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_get_gpos (hb_face_t *face)
|
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{
|
||
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::GPOS);
|
||
return *hb_ot_layout_from_face (face)->gpos;
|
||
}
|
||
|
||
/*
|
||
* GDEF
|
||
*/
|
||
|
||
hb_bool_t
|
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hb_ot_layout_has_glyph_classes (hb_face_t *face)
|
||
{
|
||
return _get_gdef (face).has_glyph_classes ();
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_get_glyph_class:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
hb_ot_layout_glyph_class_t
|
||
hb_ot_layout_get_glyph_class (hb_face_t *face,
|
||
hb_codepoint_t glyph)
|
||
{
|
||
return (hb_ot_layout_glyph_class_t) _get_gdef (face).get_glyph_class (glyph);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_get_glyphs_in_class:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
void
|
||
hb_ot_layout_get_glyphs_in_class (hb_face_t *face,
|
||
hb_ot_layout_glyph_class_t klass,
|
||
hb_set_t *glyphs /* OUT */)
|
||
{
|
||
return _get_gdef (face).get_glyphs_in_class (klass, glyphs);
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_get_attach_points (hb_face_t *face,
|
||
hb_codepoint_t glyph,
|
||
unsigned int start_offset,
|
||
unsigned int *point_count /* IN/OUT */,
|
||
unsigned int *point_array /* OUT */)
|
||
{
|
||
return _get_gdef (face).get_attach_points (glyph, start_offset, point_count, point_array);
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_get_ligature_carets (hb_font_t *font,
|
||
hb_direction_t direction,
|
||
hb_codepoint_t glyph,
|
||
unsigned int start_offset,
|
||
unsigned int *caret_count /* IN/OUT */,
|
||
hb_position_t *caret_array /* OUT */)
|
||
{
|
||
return _get_gdef (font->face).get_lig_carets (font, direction, glyph, start_offset, caret_count, caret_array);
|
||
}
|
||
|
||
|
||
/*
|
||
* GSUB/GPOS
|
||
*/
|
||
|
||
static const OT::GSUBGPOS&
|
||
get_gsubgpos_table (hb_face_t *face,
|
||
hb_tag_t table_tag)
|
||
{
|
||
switch (table_tag) {
|
||
case HB_OT_TAG_GSUB: return _get_gsub (face);
|
||
case HB_OT_TAG_GPOS: return _get_gpos (face);
|
||
default: return Null(OT::GSUBGPOS);
|
||
}
|
||
}
|
||
|
||
|
||
unsigned int
|
||
hb_ot_layout_table_get_script_tags (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int start_offset,
|
||
unsigned int *script_count /* IN/OUT */,
|
||
hb_tag_t *script_tags /* OUT */)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
return g.get_script_tags (start_offset, script_count, script_tags);
|
||
}
|
||
|
||
#define HB_OT_TAG_LATIN_SCRIPT HB_TAG ('l', 'a', 't', 'n')
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_table_find_script (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
hb_tag_t script_tag,
|
||
unsigned int *script_index)
|
||
{
|
||
static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX), "");
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
if (g.find_script_index (script_tag, script_index))
|
||
return true;
|
||
|
||
/* try finding 'DFLT' */
|
||
if (g.find_script_index (HB_OT_TAG_DEFAULT_SCRIPT, script_index))
|
||
return false;
|
||
|
||
/* try with 'dflt'; MS site has had typos and many fonts use it now :(.
|
||
* including many versions of DejaVu Sans Mono! */
|
||
if (g.find_script_index (HB_OT_TAG_DEFAULT_LANGUAGE, script_index))
|
||
return false;
|
||
|
||
/* try with 'latn'; some old fonts put their features there even though
|
||
they're really trying to support Thai, for example :( */
|
||
if (g.find_script_index (HB_OT_TAG_LATIN_SCRIPT, script_index))
|
||
return false;
|
||
|
||
if (script_index) *script_index = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
|
||
return false;
|
||
}
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_table_choose_script (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
const hb_tag_t *script_tags,
|
||
unsigned int *script_index,
|
||
hb_tag_t *chosen_script)
|
||
{
|
||
static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX), "");
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
while (*script_tags)
|
||
{
|
||
if (g.find_script_index (*script_tags, script_index)) {
|
||
if (chosen_script)
|
||
*chosen_script = *script_tags;
|
||
return true;
|
||
}
|
||
script_tags++;
|
||
}
|
||
|
||
/* try finding 'DFLT' */
|
||
if (g.find_script_index (HB_OT_TAG_DEFAULT_SCRIPT, script_index)) {
|
||
if (chosen_script)
|
||
*chosen_script = HB_OT_TAG_DEFAULT_SCRIPT;
|
||
return false;
|
||
}
|
||
|
||
/* try with 'dflt'; MS site has had typos and many fonts use it now :( */
|
||
if (g.find_script_index (HB_OT_TAG_DEFAULT_LANGUAGE, script_index)) {
|
||
if (chosen_script)
|
||
*chosen_script = HB_OT_TAG_DEFAULT_LANGUAGE;
|
||
return false;
|
||
}
|
||
|
||
/* try with 'latn'; some old fonts put their features there even though
|
||
they're really trying to support Thai, for example :( */
|
||
if (g.find_script_index (HB_OT_TAG_LATIN_SCRIPT, script_index)) {
|
||
if (chosen_script)
|
||
*chosen_script = HB_OT_TAG_LATIN_SCRIPT;
|
||
return false;
|
||
}
|
||
|
||
if (script_index) *script_index = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
|
||
if (chosen_script)
|
||
*chosen_script = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
|
||
return false;
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_table_get_feature_tags (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int start_offset,
|
||
unsigned int *feature_count /* IN/OUT */,
|
||
hb_tag_t *feature_tags /* OUT */)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
return g.get_feature_tags (start_offset, feature_count, feature_tags);
|
||
}
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_table_find_feature (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
hb_tag_t feature_tag,
|
||
unsigned int *feature_index)
|
||
{
|
||
static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX), "");
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
unsigned int num_features = g.get_feature_count ();
|
||
for (unsigned int i = 0; i < num_features; i++)
|
||
{
|
||
if (feature_tag == g.get_feature_tag (i)) {
|
||
if (feature_index) *feature_index = i;
|
||
return true;
|
||
}
|
||
}
|
||
|
||
if (feature_index) *feature_index = HB_OT_LAYOUT_NO_FEATURE_INDEX;
|
||
return false;
|
||
}
|
||
|
||
|
||
unsigned int
|
||
hb_ot_layout_script_get_language_tags (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int start_offset,
|
||
unsigned int *language_count /* IN/OUT */,
|
||
hb_tag_t *language_tags /* OUT */)
|
||
{
|
||
const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
|
||
|
||
return s.get_lang_sys_tags (start_offset, language_count, language_tags);
|
||
}
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_script_find_language (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
hb_tag_t language_tag,
|
||
unsigned int *language_index)
|
||
{
|
||
static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX), "");
|
||
const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
|
||
|
||
if (s.find_lang_sys_index (language_tag, language_index))
|
||
return true;
|
||
|
||
/* try with 'dflt'; MS site has had typos and many fonts use it now :( */
|
||
if (s.find_lang_sys_index (HB_OT_TAG_DEFAULT_LANGUAGE, language_index))
|
||
return false;
|
||
|
||
if (language_index) *language_index = HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX;
|
||
return false;
|
||
}
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_language_get_required_feature_index (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
unsigned int *feature_index)
|
||
{
|
||
return hb_ot_layout_language_get_required_feature (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
feature_index,
|
||
nullptr);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_language_get_required_feature:
|
||
*
|
||
* Since: 0.9.30
|
||
**/
|
||
hb_bool_t
|
||
hb_ot_layout_language_get_required_feature (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
unsigned int *feature_index,
|
||
hb_tag_t *feature_tag)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
|
||
|
||
unsigned int index = l.get_required_feature_index ();
|
||
if (feature_index) *feature_index = index;
|
||
if (feature_tag) *feature_tag = g.get_feature_tag (index);
|
||
|
||
return l.has_required_feature ();
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_language_get_feature_indexes (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
unsigned int start_offset,
|
||
unsigned int *feature_count /* IN/OUT */,
|
||
unsigned int *feature_indexes /* OUT */)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
|
||
|
||
return l.get_feature_indexes (start_offset, feature_count, feature_indexes);
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_language_get_feature_tags (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
unsigned int start_offset,
|
||
unsigned int *feature_count /* IN/OUT */,
|
||
hb_tag_t *feature_tags /* OUT */)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
|
||
|
||
static_assert ((sizeof (unsigned int) == sizeof (hb_tag_t)), "");
|
||
unsigned int ret = l.get_feature_indexes (start_offset, feature_count, (unsigned int *) feature_tags);
|
||
|
||
if (feature_tags) {
|
||
unsigned int count = *feature_count;
|
||
for (unsigned int i = 0; i < count; i++)
|
||
feature_tags[i] = g.get_feature_tag ((unsigned int) feature_tags[i]);
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_language_find_feature (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
hb_tag_t feature_tag,
|
||
unsigned int *feature_index)
|
||
{
|
||
static_assert ((OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX), "");
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
|
||
|
||
unsigned int num_features = l.get_feature_count ();
|
||
for (unsigned int i = 0; i < num_features; i++) {
|
||
unsigned int f_index = l.get_feature_index (i);
|
||
|
||
if (feature_tag == g.get_feature_tag (f_index)) {
|
||
if (feature_index) *feature_index = f_index;
|
||
return true;
|
||
}
|
||
}
|
||
|
||
if (feature_index) *feature_index = HB_OT_LAYOUT_NO_FEATURE_INDEX;
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_feature_get_lookups:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
unsigned int
|
||
hb_ot_layout_feature_get_lookups (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int feature_index,
|
||
unsigned int start_offset,
|
||
unsigned int *lookup_count /* IN/OUT */,
|
||
unsigned int *lookup_indexes /* OUT */)
|
||
{
|
||
return hb_ot_layout_feature_with_variations_get_lookups (face,
|
||
table_tag,
|
||
feature_index,
|
||
HB_OT_LAYOUT_NO_VARIATIONS_INDEX,
|
||
start_offset,
|
||
lookup_count,
|
||
lookup_indexes);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_table_get_lookup_count:
|
||
*
|
||
* Since: 0.9.22
|
||
**/
|
||
unsigned int
|
||
hb_ot_layout_table_get_lookup_count (hb_face_t *face,
|
||
hb_tag_t table_tag)
|
||
{
|
||
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return 0;
|
||
switch (table_tag)
|
||
{
|
||
case HB_OT_TAG_GSUB:
|
||
{
|
||
return hb_ot_layout_from_face (face)->gsub_lookup_count;
|
||
}
|
||
case HB_OT_TAG_GPOS:
|
||
{
|
||
return hb_ot_layout_from_face (face)->gpos_lookup_count;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
_hb_ot_layout_collect_lookups_lookups (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int feature_index,
|
||
hb_set_t *lookup_indexes /* OUT */)
|
||
{
|
||
unsigned int lookup_indices[32];
|
||
unsigned int offset, len;
|
||
|
||
offset = 0;
|
||
do {
|
||
len = ARRAY_LENGTH (lookup_indices);
|
||
hb_ot_layout_feature_get_lookups (face,
|
||
table_tag,
|
||
feature_index,
|
||
offset, &len,
|
||
lookup_indices);
|
||
|
||
for (unsigned int i = 0; i < len; i++)
|
||
lookup_indexes->add (lookup_indices[i]);
|
||
|
||
offset += len;
|
||
} while (len == ARRAY_LENGTH (lookup_indices));
|
||
}
|
||
|
||
static void
|
||
_hb_ot_layout_collect_lookups_features (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
unsigned int language_index,
|
||
const hb_tag_t *features,
|
||
hb_set_t *visited_features,
|
||
hb_set_t *lookup_indexes /* OUT */)
|
||
{
|
||
if (!features)
|
||
{
|
||
unsigned int required_feature_index;
|
||
if (hb_ot_layout_language_get_required_feature (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
&required_feature_index,
|
||
nullptr)
|
||
&& !visited_features->has (required_feature_index))
|
||
{
|
||
_hb_ot_layout_collect_lookups_lookups (face,
|
||
table_tag,
|
||
required_feature_index,
|
||
lookup_indexes);
|
||
visited_features->add (required_feature_index);
|
||
}
|
||
|
||
/* All features */
|
||
unsigned int feature_indices[32];
|
||
unsigned int offset, len;
|
||
|
||
offset = 0;
|
||
do {
|
||
len = ARRAY_LENGTH (feature_indices);
|
||
hb_ot_layout_language_get_feature_indexes (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
offset, &len,
|
||
feature_indices);
|
||
|
||
for (unsigned int i = 0; i < len; i++)
|
||
{
|
||
if (visited_features->has (feature_indices[i])) continue;
|
||
_hb_ot_layout_collect_lookups_lookups (face,
|
||
table_tag,
|
||
feature_indices[i],
|
||
lookup_indexes);
|
||
visited_features->add (feature_indices[i]);
|
||
}
|
||
|
||
offset += len;
|
||
} while (len == ARRAY_LENGTH (feature_indices));
|
||
}
|
||
else
|
||
{
|
||
for (; *features; features++)
|
||
{
|
||
unsigned int feature_index;
|
||
if (hb_ot_layout_language_find_feature (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
*features,
|
||
&feature_index))
|
||
_hb_ot_layout_collect_lookups_lookups (face,
|
||
table_tag,
|
||
feature_index,
|
||
lookup_indexes);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
_hb_ot_layout_collect_lookups_languages (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int script_index,
|
||
const hb_tag_t *languages,
|
||
const hb_tag_t *features,
|
||
hb_set_t *visited_features,
|
||
hb_set_t *lookup_indexes /* OUT */)
|
||
{
|
||
_hb_ot_layout_collect_lookups_features (face,
|
||
table_tag,
|
||
script_index,
|
||
HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX,
|
||
features,
|
||
visited_features,
|
||
lookup_indexes);
|
||
|
||
if (!languages)
|
||
{
|
||
/* All languages */
|
||
unsigned int count = hb_ot_layout_script_get_language_tags (face,
|
||
table_tag,
|
||
script_index,
|
||
0, nullptr, nullptr);
|
||
for (unsigned int language_index = 0; language_index < count; language_index++)
|
||
_hb_ot_layout_collect_lookups_features (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
features,
|
||
visited_features,
|
||
lookup_indexes);
|
||
}
|
||
else
|
||
{
|
||
for (; *languages; languages++)
|
||
{
|
||
unsigned int language_index;
|
||
if (hb_ot_layout_script_find_language (face,
|
||
table_tag,
|
||
script_index,
|
||
*languages,
|
||
&language_index))
|
||
_hb_ot_layout_collect_lookups_features (face,
|
||
table_tag,
|
||
script_index,
|
||
language_index,
|
||
features,
|
||
visited_features,
|
||
lookup_indexes);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_collect_lookups:
|
||
*
|
||
* Since: 0.9.8
|
||
**/
|
||
void
|
||
hb_ot_layout_collect_lookups (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
const hb_tag_t *scripts,
|
||
const hb_tag_t *languages,
|
||
const hb_tag_t *features,
|
||
hb_set_t *lookup_indexes /* OUT */)
|
||
{
|
||
hb_auto_t<hb_set_t> visited_features;
|
||
if (!scripts)
|
||
{
|
||
/* All scripts */
|
||
unsigned int count = hb_ot_layout_table_get_script_tags (face,
|
||
table_tag,
|
||
0, nullptr, nullptr);
|
||
for (unsigned int script_index = 0; script_index < count; script_index++)
|
||
_hb_ot_layout_collect_lookups_languages (face,
|
||
table_tag,
|
||
script_index,
|
||
languages,
|
||
features,
|
||
&visited_features,
|
||
lookup_indexes);
|
||
}
|
||
else
|
||
{
|
||
for (; *scripts; scripts++)
|
||
{
|
||
unsigned int script_index;
|
||
if (hb_ot_layout_table_find_script (face,
|
||
table_tag,
|
||
*scripts,
|
||
&script_index))
|
||
_hb_ot_layout_collect_lookups_languages (face,
|
||
table_tag,
|
||
script_index,
|
||
languages,
|
||
features,
|
||
&visited_features,
|
||
lookup_indexes);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_lookup_collect_glyphs:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
void
|
||
hb_ot_layout_lookup_collect_glyphs (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int lookup_index,
|
||
hb_set_t *glyphs_before, /* OUT. May be nullptr */
|
||
hb_set_t *glyphs_input, /* OUT. May be nullptr */
|
||
hb_set_t *glyphs_after, /* OUT. May be nullptr */
|
||
hb_set_t *glyphs_output /* OUT. May be nullptr */)
|
||
{
|
||
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return;
|
||
|
||
OT::hb_collect_glyphs_context_t c (face,
|
||
glyphs_before,
|
||
glyphs_input,
|
||
glyphs_after,
|
||
glyphs_output);
|
||
|
||
switch (table_tag)
|
||
{
|
||
case HB_OT_TAG_GSUB:
|
||
{
|
||
const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
|
||
l.collect_glyphs (&c);
|
||
return;
|
||
}
|
||
case HB_OT_TAG_GPOS:
|
||
{
|
||
const OT::PosLookup& l = hb_ot_layout_from_face (face)->gpos->get_lookup (lookup_index);
|
||
l.collect_glyphs (&c);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Variations support */
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_table_find_feature_variations (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
const int *coords,
|
||
unsigned int num_coords,
|
||
unsigned int *variations_index /* out */)
|
||
{
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
return g.find_variations_index (coords, num_coords, variations_index);
|
||
}
|
||
|
||
unsigned int
|
||
hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face,
|
||
hb_tag_t table_tag,
|
||
unsigned int feature_index,
|
||
unsigned int variations_index,
|
||
unsigned int start_offset,
|
||
unsigned int *lookup_count /* IN/OUT */,
|
||
unsigned int *lookup_indexes /* OUT */)
|
||
{
|
||
static_assert ((OT::FeatureVariations::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_VARIATIONS_INDEX), "");
|
||
const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
|
||
|
||
const OT::Feature &f = g.get_feature_variation (feature_index, variations_index);
|
||
|
||
return f.get_lookup_indexes (start_offset, lookup_count, lookup_indexes);
|
||
}
|
||
|
||
|
||
/*
|
||
* OT::GSUB
|
||
*/
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_has_substitution (hb_face_t *face)
|
||
{
|
||
return &_get_gsub (face) != &Null(OT::GSUB);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_lookup_would_substitute:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
hb_bool_t
|
||
hb_ot_layout_lookup_would_substitute (hb_face_t *face,
|
||
unsigned int lookup_index,
|
||
const hb_codepoint_t *glyphs,
|
||
unsigned int glyphs_length,
|
||
hb_bool_t zero_context)
|
||
{
|
||
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return false;
|
||
return hb_ot_layout_lookup_would_substitute_fast (face, lookup_index, glyphs, glyphs_length, zero_context);
|
||
}
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
|
||
unsigned int lookup_index,
|
||
const hb_codepoint_t *glyphs,
|
||
unsigned int glyphs_length,
|
||
hb_bool_t zero_context)
|
||
{
|
||
if (unlikely (lookup_index >= hb_ot_layout_from_face (face)->gsub_lookup_count)) return false;
|
||
OT::hb_would_apply_context_t c (face, glyphs, glyphs_length, (bool) zero_context);
|
||
|
||
const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
|
||
|
||
return l.would_apply (&c, &hb_ot_layout_from_face (face)->gsub_accels[lookup_index]);
|
||
}
|
||
|
||
void
|
||
hb_ot_layout_substitute_start (hb_font_t *font, hb_buffer_t *buffer)
|
||
{
|
||
OT::GSUB::substitute_start (font, buffer);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_lookup_substitute_closure:
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
void
|
||
hb_ot_layout_lookup_substitute_closure (hb_face_t *face,
|
||
unsigned int lookup_index,
|
||
hb_set_t *glyphs)
|
||
{
|
||
hb_auto_t<hb_map_t> done_lookups;
|
||
OT::hb_closure_context_t c (face, glyphs, &done_lookups);
|
||
|
||
const OT::SubstLookup& l = _get_gsub (face).get_lookup (lookup_index);
|
||
|
||
l.closure (&c, lookup_index);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_lookups_substitute_closure:
|
||
*
|
||
* Compute the transitive closure of glyphs needed for all of the
|
||
* provided lookups.
|
||
*
|
||
* Since: 1.8.1
|
||
**/
|
||
void
|
||
hb_ot_layout_lookups_substitute_closure (hb_face_t *face,
|
||
const hb_set_t *lookups,
|
||
hb_set_t *glyphs)
|
||
{
|
||
hb_auto_t<hb_map_t> done_lookups;
|
||
OT::hb_closure_context_t c (face, glyphs, &done_lookups);
|
||
const OT::GSUB& gsub = _get_gsub (face);
|
||
|
||
unsigned int iteration_count = 0;
|
||
unsigned int glyphs_length;
|
||
do
|
||
{
|
||
glyphs_length = glyphs->get_population ();
|
||
if (lookups != nullptr)
|
||
{
|
||
for (hb_codepoint_t lookup_index = HB_SET_VALUE_INVALID; hb_set_next (lookups, &lookup_index);)
|
||
gsub.get_lookup (lookup_index).closure (&c, lookup_index);
|
||
}
|
||
else
|
||
{
|
||
for (unsigned int i = 0; i < gsub.get_lookup_count (); i++)
|
||
gsub.get_lookup (i).closure (&c, i);
|
||
}
|
||
iteration_count++;
|
||
} while (iteration_count <= HB_CLOSURE_MAX_STAGES
|
||
&& glyphs_length != glyphs->get_population ());
|
||
}
|
||
|
||
/*
|
||
* OT::GPOS
|
||
*/
|
||
|
||
hb_bool_t
|
||
hb_ot_layout_has_positioning (hb_face_t *face)
|
||
{
|
||
return &_get_gpos (face) != &Null(OT::GPOS);
|
||
}
|
||
|
||
void
|
||
hb_ot_layout_position_start (hb_font_t *font, hb_buffer_t *buffer)
|
||
{
|
||
OT::GPOS::position_start (font, buffer);
|
||
}
|
||
|
||
void
|
||
hb_ot_layout_position_finish_advances (hb_font_t *font, hb_buffer_t *buffer)
|
||
{
|
||
OT::GPOS::position_finish_advances (font, buffer);
|
||
}
|
||
|
||
void
|
||
hb_ot_layout_position_finish_offsets (hb_font_t *font, hb_buffer_t *buffer)
|
||
{
|
||
OT::GPOS::position_finish_offsets (font, buffer);
|
||
}
|
||
|
||
static const OT::FeatureParams&
|
||
_get_gsubgpos_matched_feature_params (hb_face_t *face, hb_tag_t feature)
|
||
{
|
||
const OT::GSUB &gsub = _get_gsub (face);
|
||
unsigned int gsub_num_features = gsub.get_feature_count ();
|
||
for (unsigned int i = 0; i < gsub_num_features; i++)
|
||
if (feature == gsub.get_feature_tag (i))
|
||
return gsub.get_feature (i).get_feature_params ();
|
||
|
||
const OT::GPOS &gpos = _get_gpos (face);
|
||
unsigned int gpos_num_features = gpos.get_feature_count ();
|
||
for (unsigned int i = 0; i < gpos_num_features; i++)
|
||
if (feature == gpos.get_feature_tag (i))
|
||
return gpos.get_feature (i).get_feature_params ();
|
||
|
||
return Null (OT::FeatureParams);
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_get_size_params:
|
||
*
|
||
* Since: 0.9.10
|
||
**/
|
||
hb_bool_t
|
||
hb_ot_layout_get_size_params (hb_face_t *face,
|
||
unsigned int *design_size, /* OUT. May be nullptr */
|
||
unsigned int *subfamily_id, /* OUT. May be nullptr */
|
||
unsigned int *subfamily_name_id, /* OUT. May be nullptr */
|
||
unsigned int *range_start, /* OUT. May be nullptr */
|
||
unsigned int *range_end /* OUT. May be nullptr */)
|
||
{
|
||
const OT::GPOS &gpos = _get_gpos (face);
|
||
const hb_tag_t tag = HB_TAG ('s','i','z','e');
|
||
|
||
unsigned int num_features = gpos.get_feature_count ();
|
||
for (unsigned int i = 0; i < num_features; i++)
|
||
{
|
||
if (tag == gpos.get_feature_tag (i))
|
||
{
|
||
const OT::Feature &f = gpos.get_feature (i);
|
||
const OT::FeatureParamsSize ¶ms = f.get_feature_params ().get_size_params (tag);
|
||
|
||
if (params.designSize)
|
||
{
|
||
#define PARAM(a, A) if (a) *a = params.A
|
||
PARAM (design_size, designSize);
|
||
PARAM (subfamily_id, subfamilyID);
|
||
PARAM (subfamily_name_id, subfamilyNameID);
|
||
PARAM (range_start, rangeStart);
|
||
PARAM (range_end, rangeEnd);
|
||
#undef PARAM
|
||
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
|
||
#define PARAM(a, A) if (a) *a = 0
|
||
PARAM (design_size, designSize);
|
||
PARAM (subfamily_id, subfamilyID);
|
||
PARAM (subfamily_name_id, subfamilyNameID);
|
||
PARAM (range_start, rangeStart);
|
||
PARAM (range_end, rangeEnd);
|
||
#undef PARAM
|
||
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* hb_ot_layout_get_feature_name_ids:
|
||
* @face: #hb_face_t to work upon
|
||
* @feature: ssXX and cvXX tag
|
||
* @label_id: (out) (allow-none): The ‘name’ table name ID that specifies a string
|
||
* for a user-interface label for this feature. (May be NULL.)
|
||
* @tooltip_id: (out) (allow-none): The ‘name’ table name ID that specifies a string
|
||
* that an application can use for tooltip text for this
|
||
* feature. (May be NULL.)
|
||
* @sample_id: (out) (allow-none): The ‘name’ table name ID that specifies sample text
|
||
* that illustrates the effect of this feature. (May be NULL.)
|
||
* @num_named_parameters: (out) (allow-none): Number of named parameters. (May be zero.)
|
||
* @first_param_id: (out) (allow-none): The first ‘name’ table name ID used to specify
|
||
* strings for user-interface labels for the feature
|
||
* parameters. (Must be zero if numParameters is zero.)
|
||
*
|
||
* Return value: true if could find any feature with the tag, false otherwise
|
||
*
|
||
* Since: REPLACEME
|
||
**/
|
||
hb_bool_t
|
||
hb_ot_layout_get_feature_name_ids (hb_face_t *face,
|
||
hb_tag_t feature,
|
||
unsigned int *label_id, /* OUT. May be nullptr */
|
||
unsigned int *tooltip_id, /* OUT. May be nullptr */
|
||
unsigned int *sample_id, /* OUT. May be nullptr */
|
||
unsigned int *num_named_parameters, /* OUT. May be nullptr */
|
||
unsigned int *first_param_id /* OUT. May be nullptr */)
|
||
{
|
||
const OT::FeatureParams &feature_params =
|
||
_get_gsubgpos_matched_feature_params (face, feature);
|
||
if (&feature_params != &Null (OT::FeatureParams))
|
||
{
|
||
const OT::FeatureParamsStylisticSet& ss_params =
|
||
feature_params.get_stylistic_set_params (feature);
|
||
if (&ss_params != &Null (OT::FeatureParamsStylisticSet)) /* ssXX */
|
||
{
|
||
#define PARAM(a, A) if (a) *a = A
|
||
PARAM(label_id, ss_params.uiNameID);
|
||
// ssXX features don't have the rest
|
||
PARAM(tooltip_id, 0);
|
||
PARAM(sample_id, 0);
|
||
PARAM(num_named_parameters, 0);
|
||
PARAM(first_param_id, 0);
|
||
return true;
|
||
}
|
||
const OT::FeatureParamsCharacterVariants& cv_params =
|
||
feature_params.get_character_variants_params (feature);
|
||
if (&cv_params != &Null (OT::FeatureParamsCharacterVariants)) /* cvXX */
|
||
{
|
||
PARAM(label_id, cv_params.featUILableNameID);
|
||
PARAM(tooltip_id, cv_params.featUITooltipTextNameID);
|
||
PARAM(sample_id, cv_params.sampleTextNameID);
|
||
PARAM(num_named_parameters, cv_params.numNamedParameters);
|
||
PARAM(first_param_id, cv_params.firstParamUILabelNameID);
|
||
return true;
|
||
}
|
||
}
|
||
|
||
PARAM(label_id, 0);
|
||
PARAM(tooltip_id, 0);
|
||
PARAM(sample_id, 0);
|
||
PARAM(num_named_parameters, 0);
|
||
PARAM(first_param_id, 0);
|
||
#undef PARAM
|
||
return false;
|
||
}
|
||
|
||
|
||
/*
|
||
* Parts of different types are implemented here such that they have direct
|
||
* access to GSUB/GPOS lookups.
|
||
*/
|
||
|
||
|
||
struct GSUBProxy
|
||
{
|
||
static const unsigned int table_index = 0;
|
||
static const bool inplace = false;
|
||
typedef OT::SubstLookup Lookup;
|
||
|
||
GSUBProxy (hb_face_t *face) :
|
||
table (*hb_ot_layout_from_face (face)->gsub),
|
||
accels (hb_ot_layout_from_face (face)->gsub_accels) {}
|
||
|
||
const OT::GSUB &table;
|
||
const hb_ot_layout_lookup_accelerator_t *accels;
|
||
};
|
||
|
||
struct GPOSProxy
|
||
{
|
||
static const unsigned int table_index = 1;
|
||
static const bool inplace = true;
|
||
typedef OT::PosLookup Lookup;
|
||
|
||
GPOSProxy (hb_face_t *face) :
|
||
table (*hb_ot_layout_from_face (face)->gpos),
|
||
accels (hb_ot_layout_from_face (face)->gpos_accels) {}
|
||
|
||
const OT::GPOS &table;
|
||
const hb_ot_layout_lookup_accelerator_t *accels;
|
||
};
|
||
|
||
|
||
struct hb_get_subtables_context_t :
|
||
OT::hb_dispatch_context_t<hb_get_subtables_context_t, hb_void_t, HB_DEBUG_APPLY>
|
||
{
|
||
template <typename Type>
|
||
static inline bool apply_to (const void *obj, OT::hb_ot_apply_context_t *c)
|
||
{
|
||
const Type *typed_obj = (const Type *) obj;
|
||
return typed_obj->apply (c);
|
||
}
|
||
|
||
typedef bool (*hb_apply_func_t) (const void *obj, OT::hb_ot_apply_context_t *c);
|
||
|
||
struct hb_applicable_t
|
||
{
|
||
inline void init (const void *obj_, hb_apply_func_t apply_func_)
|
||
{
|
||
obj = obj_;
|
||
apply_func = apply_func_;
|
||
}
|
||
|
||
inline bool apply (OT::hb_ot_apply_context_t *c) const { return apply_func (obj, c); }
|
||
|
||
private:
|
||
const void *obj;
|
||
hb_apply_func_t apply_func;
|
||
};
|
||
|
||
typedef hb_auto_t<hb_vector_t<hb_applicable_t> > array_t;
|
||
|
||
/* Dispatch interface. */
|
||
inline const char *get_name (void) { return "GET_SUBTABLES"; }
|
||
template <typename T>
|
||
inline return_t dispatch (const T &obj)
|
||
{
|
||
hb_applicable_t *entry = array.push();
|
||
entry->init (&obj, apply_to<T>);
|
||
return HB_VOID;
|
||
}
|
||
static return_t default_return_value (void) { return HB_VOID; }
|
||
bool stop_sublookup_iteration (return_t r HB_UNUSED) const { return false; }
|
||
|
||
hb_get_subtables_context_t (array_t &array_) :
|
||
array (array_),
|
||
debug_depth (0) {}
|
||
|
||
array_t &array;
|
||
unsigned int debug_depth;
|
||
};
|
||
|
||
static inline bool
|
||
apply_forward (OT::hb_ot_apply_context_t *c,
|
||
const hb_ot_layout_lookup_accelerator_t &accel,
|
||
const hb_get_subtables_context_t::array_t &subtables)
|
||
{
|
||
bool ret = false;
|
||
hb_buffer_t *buffer = c->buffer;
|
||
while (buffer->idx < buffer->len && buffer->successful)
|
||
{
|
||
bool applied = false;
|
||
if (accel.may_have (buffer->cur().codepoint) &&
|
||
(buffer->cur().mask & c->lookup_mask) &&
|
||
c->check_glyph_property (&buffer->cur(), c->lookup_props))
|
||
{
|
||
for (unsigned int i = 0; i < subtables.len; i++)
|
||
if (subtables[i].apply (c))
|
||
{
|
||
applied = true;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (applied)
|
||
ret = true;
|
||
else
|
||
buffer->next_glyph ();
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
static inline bool
|
||
apply_backward (OT::hb_ot_apply_context_t *c,
|
||
const hb_ot_layout_lookup_accelerator_t &accel,
|
||
const hb_get_subtables_context_t::array_t &subtables)
|
||
{
|
||
bool ret = false;
|
||
hb_buffer_t *buffer = c->buffer;
|
||
do
|
||
{
|
||
if (accel.may_have (buffer->cur().codepoint) &&
|
||
(buffer->cur().mask & c->lookup_mask) &&
|
||
c->check_glyph_property (&buffer->cur(), c->lookup_props))
|
||
{
|
||
for (unsigned int i = 0; i < subtables.len; i++)
|
||
if (subtables[i].apply (c))
|
||
{
|
||
ret = true;
|
||
break;
|
||
}
|
||
}
|
||
/* The reverse lookup doesn't "advance" cursor (for good reason). */
|
||
buffer->idx--;
|
||
|
||
}
|
||
while ((int) buffer->idx >= 0);
|
||
return ret;
|
||
}
|
||
|
||
template <typename Proxy>
|
||
static inline void
|
||
apply_string (OT::hb_ot_apply_context_t *c,
|
||
const typename Proxy::Lookup &lookup,
|
||
const hb_ot_layout_lookup_accelerator_t &accel)
|
||
{
|
||
hb_buffer_t *buffer = c->buffer;
|
||
|
||
if (unlikely (!buffer->len || !c->lookup_mask))
|
||
return;
|
||
|
||
c->set_lookup_props (lookup.get_props ());
|
||
|
||
hb_get_subtables_context_t::array_t subtables;
|
||
hb_get_subtables_context_t c_get_subtables (subtables);
|
||
lookup.dispatch (&c_get_subtables);
|
||
|
||
if (likely (!lookup.is_reverse ()))
|
||
{
|
||
/* in/out forward substitution/positioning */
|
||
if (Proxy::table_index == 0)
|
||
buffer->clear_output ();
|
||
buffer->idx = 0;
|
||
|
||
bool ret;
|
||
ret = apply_forward (c, accel, subtables);
|
||
if (ret)
|
||
{
|
||
if (!Proxy::inplace)
|
||
buffer->swap_buffers ();
|
||
else
|
||
assert (!buffer->has_separate_output ());
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* in-place backward substitution/positioning */
|
||
if (Proxy::table_index == 0)
|
||
buffer->remove_output ();
|
||
buffer->idx = buffer->len - 1;
|
||
|
||
apply_backward (c, accel, subtables);
|
||
}
|
||
}
|
||
|
||
template <typename Proxy>
|
||
inline void hb_ot_map_t::apply (const Proxy &proxy,
|
||
const hb_ot_shape_plan_t *plan,
|
||
hb_font_t *font,
|
||
hb_buffer_t *buffer) const
|
||
{
|
||
const unsigned int table_index = proxy.table_index;
|
||
unsigned int i = 0;
|
||
OT::hb_ot_apply_context_t c (table_index, font, buffer);
|
||
c.set_recurse_func (Proxy::Lookup::apply_recurse_func);
|
||
|
||
for (unsigned int stage_index = 0; stage_index < stages[table_index].len; stage_index++) {
|
||
const stage_map_t *stage = &stages[table_index][stage_index];
|
||
for (; i < stage->last_lookup; i++)
|
||
{
|
||
unsigned int lookup_index = lookups[table_index][i].index;
|
||
if (!buffer->message (font, "start lookup %d", lookup_index)) continue;
|
||
c.set_lookup_index (lookup_index);
|
||
c.set_lookup_mask (lookups[table_index][i].mask);
|
||
c.set_auto_zwj (lookups[table_index][i].auto_zwj);
|
||
c.set_auto_zwnj (lookups[table_index][i].auto_zwnj);
|
||
apply_string<Proxy> (&c,
|
||
proxy.table.get_lookup (lookup_index),
|
||
proxy.accels[lookup_index]);
|
||
(void) buffer->message (font, "end lookup %d", lookup_index);
|
||
}
|
||
|
||
if (stage->pause_func)
|
||
{
|
||
buffer->clear_output ();
|
||
stage->pause_func (plan, font, buffer);
|
||
}
|
||
}
|
||
}
|
||
|
||
void hb_ot_map_t::substitute (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
|
||
{
|
||
GSUBProxy proxy (font->face);
|
||
apply (proxy, plan, font, buffer);
|
||
}
|
||
|
||
void hb_ot_map_t::position (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
|
||
{
|
||
GPOSProxy proxy (font->face);
|
||
apply (proxy, plan, font, buffer);
|
||
}
|
||
|
||
void
|
||
hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
|
||
const OT::SubstLookup &lookup,
|
||
const hb_ot_layout_lookup_accelerator_t &accel)
|
||
{
|
||
apply_string<GSUBProxy> (c, lookup, accel);
|
||
}
|
||
|
||
|
||
|
||
|
||
/*
|
||
* OT::BASE
|
||
*/
|
||
|
||
// /**
|
||
// * hb_ot_base_has_data:
|
||
// * @face: #hb_face_t to test
|
||
// *
|
||
// * This function allows to verify the presence of an OpenType BASE table on the
|
||
// * face.
|
||
// *
|
||
// * Return value: true if face has a BASE table, false otherwise
|
||
// *
|
||
// * Since: XXX
|
||
// **/
|
||
// hb_bool_t
|
||
// hb_ot_base_has_data (hb_face_t *face)
|
||
// {
|
||
// return &_get_base (face) != &Null(OT::BASE);
|
||
// }
|