150 lines
4.0 KiB
C++
150 lines
4.0 KiB
C++
/*
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* Copyright © 2017 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb-open-type.hh"
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#include "hb-ot-face.hh"
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#include "hb-aat-layout.hh"
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#include "hb-aat-layout-ankr-table.hh"
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#include "hb-aat-layout-bsln-table.hh" // Just so we compile it; unused otherwise.
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#include "hb-aat-layout-feat-table.hh" // Just so we compile it; unused otherwise.
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#include "hb-aat-layout-kerx-table.hh"
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#include "hb-aat-layout-morx-table.hh"
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#include "hb-aat-layout-trak-table.hh"
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#include "hb-aat-ltag-table.hh" // Just so we compile it; unused otherwise.
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/*
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* morx/kerx/trak
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*/
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static inline const AAT::morx&
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_get_morx (hb_face_t *face, hb_blob_t **blob = nullptr)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
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{
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if (blob)
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*blob = hb_blob_get_empty ();
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return Null(AAT::morx);
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}
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const AAT::morx& morx = *(hb_ot_face_data (face)->morx.get ());
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if (blob)
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*blob = hb_ot_face_data (face)->morx.get_blob ();
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return morx;
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}
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static inline const AAT::kerx&
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_get_kerx (hb_face_t *face, hb_blob_t **blob = nullptr)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
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{
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if (blob)
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*blob = hb_blob_get_empty ();
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return Null(AAT::kerx);
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}
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const AAT::kerx& kerx = *(hb_ot_face_data (face)->kerx.get ());
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if (blob)
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*blob = hb_ot_face_data (face)->kerx.get_blob ();
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return kerx;
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}
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static inline const AAT::ankr&
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_get_ankr (hb_face_t *face, hb_blob_t **blob = nullptr)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
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{
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if (blob)
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*blob = hb_blob_get_empty ();
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return Null(AAT::ankr);
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}
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const AAT::ankr& ankr = *(hb_ot_face_data (face)->ankr.get ());
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if (blob)
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*blob = hb_ot_face_data (face)->ankr.get_blob ();
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return ankr;
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}
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static inline const AAT::trak&
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_get_trak (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(AAT::trak);
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return *(hb_ot_face_data (face)->trak.get ());
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}
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hb_bool_t
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hb_aat_layout_has_substitution (hb_face_t *face)
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{
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return _get_morx (face).has_data ();
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}
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void
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hb_aat_layout_substitute (hb_ot_shape_plan_t *plan,
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hb_font_t *font,
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hb_buffer_t *buffer)
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{
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hb_blob_t *blob;
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const AAT::morx& morx = _get_morx (font->face, &blob);
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AAT::hb_aat_apply_context_t c (plan, font, buffer, blob);
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morx.apply (&c);
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}
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hb_bool_t
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hb_aat_layout_has_positioning (hb_face_t *face)
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{
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return _get_kerx (face).has_data ();
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}
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void
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hb_aat_layout_position (hb_ot_shape_plan_t *plan,
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hb_font_t *font,
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hb_buffer_t *buffer)
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{
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hb_blob_t *blob;
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const AAT::kerx& kerx = _get_kerx (font->face, &blob);
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hb_blob_t *ankr_blob;
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const AAT::ankr& ankr = _get_ankr (font->face, &ankr_blob);
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AAT::hb_aat_apply_context_t c (plan, font, buffer, blob,
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ankr, ankr_blob->data + ankr_blob->length);
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kerx.apply (&c);
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}
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hb_bool_t
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hb_aat_layout_has_tracking (hb_face_t *face)
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{
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return _get_trak (face).has_data ();
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}
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void
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hb_aat_layout_track (hb_ot_shape_plan_t *plan,
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hb_font_t *font,
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hb_buffer_t *buffer)
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{
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const AAT::trak& trak = _get_trak (font->face);
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AAT::hb_aat_apply_context_t c (plan, font, buffer);
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trak.apply (&c);
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}
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