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Diffstat (limited to 'src/hb-aat-layout.cc')
-rw-r--r-- | src/hb-aat-layout.cc | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/hb-aat-layout.cc b/src/hb-aat-layout.cc new file mode 100644 index 0000000..45268e3 --- /dev/null +++ b/src/hb-aat-layout.cc @@ -0,0 +1,143 @@ +/* + * 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-private.hh" + +#include "hb-ot-layout-private.hh" +#include "hb-ot-layout-gsubgpos-private.hh" + +#include "hb-aat-layout-private.hh" +#include "hb-aat-layout-ankr-table.hh" +#include "hb-aat-layout-kerx-table.hh" +#include "hb-aat-layout-morx-table.hh" +#include "hb-aat-layout-trak-table.hh" + +/* + * morx/kerx/trak + */ + +static inline const AAT::ankr& +_get_ankr (hb_face_t *face, hb_blob_t **blob = nullptr) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) + { + if (blob) + *blob = hb_blob_get_empty (); + return OT::Null(AAT::ankr); + } + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + const AAT::ankr& ankr = *(layout->ankr.get ()); + if (blob) + *blob = layout->ankr.blob; + return ankr; +} + +static inline const AAT::kerx& +_get_kerx (hb_face_t *face, hb_blob_t **blob = nullptr) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) + { + if (blob) + *blob = hb_blob_get_empty (); + return OT::Null(AAT::kerx); + } + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + /* XXX this doesn't call set_num_glyphs on sanitizer. */ + const AAT::kerx& kerx = *(layout->kerx.get ()); + if (blob) + *blob = layout->kerx.blob; + return kerx; +} + +static inline const AAT::morx& +_get_morx (hb_face_t *face, hb_blob_t **blob = nullptr) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) + { + if (blob) + *blob = hb_blob_get_empty (); + return OT::Null(AAT::morx); + } + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + /* XXX this doesn't call set_num_glyphs on sanitizer. */ + const AAT::morx& morx = *(layout->morx.get ()); + if (blob) + *blob = layout->morx.blob; + return morx; +} + +static inline const AAT::trak& +_get_trak (hb_face_t *face, hb_blob_t **blob = nullptr) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) + { + if (blob) + *blob = hb_blob_get_empty (); + return OT::Null(AAT::trak); + } + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + const AAT::trak& trak = *(layout->trak.get ()); + if (blob) + *blob = layout->trak.blob; + return trak; +} + +// static inline void +// _hb_aat_layout_create (hb_face_t *face) +// { +// OT::Sanitizer<AAT::morx> sanitizer; +// sanitizer.set_num_glyphs (face->get_num_glyphs ()); +// hb_blob_t *morx_blob = sanitizer.sanitize (face->reference_table (HB_AAT_TAG_MORX)); +// OT::Sanitizer<AAT::morx>::lock_instance (morx_blob); + +// if (0) +// { +// OT::Sanitizer<AAT::Lookup<OT::GlyphID> >::lock_instance (morx_blob)->get_value (1, face->get_num_glyphs ()); +// } +// } + +void +hb_aat_layout_substitute (hb_font_t *font, hb_buffer_t *buffer) +{ + hb_blob_t *blob; + const AAT::morx& morx = _get_morx (font->face, &blob); + + AAT::hb_aat_apply_context_t c (font, buffer, blob); + morx.apply (&c); +} + +void +hb_aat_layout_position (hb_font_t *font, hb_buffer_t *buffer) +{ + hb_blob_t *blob; + const AAT::ankr& ankr = _get_ankr (font->face, &blob); + const AAT::kerx& kerx = _get_kerx (font->face, &blob); + const AAT::trak& trak = _get_trak (font->face, &blob); + + AAT::hb_aat_apply_context_t c (font, buffer, blob); + kerx.apply (&c, &ankr); + trak.apply (&c); +} |