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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc b/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc new file mode 100644 index 0000000000..90ba0bd02c --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc @@ -0,0 +1,159 @@ +/* + * 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-var-avar-table.hh" +#include "hb-ot-var-fvar-table.hh" +#include "hb-ot-var-mvar-table.hh" +#include "hb-ot-var.h" + +/* + * fvar/avar + */ + +static inline const OT::fvar& +_get_fvar (hb_face_t *face) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::fvar); + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + return *(layout->fvar.get ()); +} +static inline const OT::avar& +_get_avar (hb_face_t *face) +{ + if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::avar); + hb_ot_layout_t * layout = hb_ot_layout_from_face (face); + return *(layout->avar.get ()); +} + +/** + * hb_ot_var_has_data: + * @face: #hb_face_t to test + * + * This function allows to verify the presence of OpenType variation data on the face. + * Alternatively, use hb_ot_var_get_axis_count(). + * + * Return value: true if face has a `fvar' table and false otherwise + * + * Since: 1.4.2 + **/ +hb_bool_t +hb_ot_var_has_data (hb_face_t *face) +{ + return &_get_fvar (face) != &OT::Null(OT::fvar); +} + +/** + * hb_ot_var_get_axis_count: + * + * Since: 1.4.2 + **/ +unsigned int +hb_ot_var_get_axis_count (hb_face_t *face) +{ + const OT::fvar &fvar = _get_fvar (face); + return fvar.get_axis_count (); +} + +/** + * hb_ot_var_get_axes: + * + * Since: 1.4.2 + **/ +unsigned int +hb_ot_var_get_axes (hb_face_t *face, + unsigned int start_offset, + unsigned int *axes_count /* IN/OUT */, + hb_ot_var_axis_t *axes_array /* OUT */) +{ + const OT::fvar &fvar = _get_fvar (face); + return fvar.get_axis_infos (start_offset, axes_count, axes_array); +} + +/** + * hb_ot_var_find_axis: + * + * Since: 1.4.2 + **/ +hb_bool_t +hb_ot_var_find_axis (hb_face_t *face, + hb_tag_t axis_tag, + unsigned int *axis_index, + hb_ot_var_axis_t *axis_info) +{ + const OT::fvar &fvar = _get_fvar (face); + return fvar.find_axis (axis_tag, axis_index, axis_info); +} + + +/** + * hb_ot_var_normalize_variations: + * + * Since: 1.4.2 + **/ +void +hb_ot_var_normalize_variations (hb_face_t *face, + const hb_variation_t *variations, /* IN */ + unsigned int variations_length, + int *coords, /* OUT */ + unsigned int coords_length) +{ + for (unsigned int i = 0; i < coords_length; i++) + coords[i] = 0; + + const OT::fvar &fvar = _get_fvar (face); + for (unsigned int i = 0; i < variations_length; i++) + { + unsigned int axis_index; + if (hb_ot_var_find_axis (face, variations[i].tag, &axis_index, nullptr) && + axis_index < coords_length) + coords[axis_index] = fvar.normalize_axis_value (axis_index, variations[i].value); + } + + const OT::avar &avar = _get_avar (face); + avar.map_coords (coords, coords_length); +} + +/** + * hb_ot_var_normalize_coords: + * + * Since: 1.4.2 + **/ +void +hb_ot_var_normalize_coords (hb_face_t *face, + unsigned int coords_length, + const float *design_coords, /* IN */ + int *normalized_coords /* OUT */) +{ + const OT::fvar &fvar = _get_fvar (face); + for (unsigned int i = 0; i < coords_length; i++) + normalized_coords[i] = fvar.normalize_axis_value (i, design_coords[i]); + + const OT::avar &avar = _get_avar (face); + avar.map_coords (normalized_coords, coords_length); +} |