160 lines
4.2 KiB
C++
160 lines
4.2 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-ot-var-avar-table.hh"
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#include "hb-ot-var-fvar-table.hh"
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#include "hb-ot-var-mvar-table.hh"
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#include "hb-ot-var.h"
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/*
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* fvar/avar
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*/
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static inline const OT::fvar&
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_get_fvar (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::fvar);
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hb_ot_face_data_t *layout = hb_ot_face_data (face);
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return *(layout->fvar.get ());
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}
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static inline const OT::avar&
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_get_avar (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::avar);
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hb_ot_face_data_t *layout = hb_ot_face_data (face);
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return *(layout->avar.get ());
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}
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/**
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* hb_ot_var_has_data:
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* @face: #hb_face_t to test
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*
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* This function allows to verify the presence of OpenType variation data on the face.
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* Alternatively, use hb_ot_var_get_axis_count().
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*
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* Return value: true if face has a `fvar' table and false otherwise
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*
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* Since: 1.4.2
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**/
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hb_bool_t
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hb_ot_var_has_data (hb_face_t *face)
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{
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return _get_fvar (face).has_data ();
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}
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/**
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* hb_ot_var_get_axis_count:
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*
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* Since: 1.4.2
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**/
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unsigned int
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hb_ot_var_get_axis_count (hb_face_t *face)
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{
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const OT::fvar &fvar = _get_fvar (face);
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return fvar.get_axis_count ();
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}
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/**
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* hb_ot_var_get_axes:
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*
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* Since: 1.4.2
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**/
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unsigned int
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hb_ot_var_get_axes (hb_face_t *face,
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unsigned int start_offset,
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unsigned int *axes_count /* IN/OUT */,
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hb_ot_var_axis_t *axes_array /* OUT */)
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{
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const OT::fvar &fvar = _get_fvar (face);
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return fvar.get_axis_infos (start_offset, axes_count, axes_array);
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}
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/**
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* hb_ot_var_find_axis:
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*
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* Since: 1.4.2
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**/
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hb_bool_t
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hb_ot_var_find_axis (hb_face_t *face,
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hb_tag_t axis_tag,
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unsigned int *axis_index,
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hb_ot_var_axis_t *axis_info)
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{
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const OT::fvar &fvar = _get_fvar (face);
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return fvar.find_axis (axis_tag, axis_index, axis_info);
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}
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/**
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* hb_ot_var_normalize_variations:
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*
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* Since: 1.4.2
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**/
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void
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hb_ot_var_normalize_variations (hb_face_t *face,
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const hb_variation_t *variations, /* IN */
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unsigned int variations_length,
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int *coords, /* OUT */
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unsigned int coords_length)
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{
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for (unsigned int i = 0; i < coords_length; i++)
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coords[i] = 0;
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const OT::fvar &fvar = _get_fvar (face);
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for (unsigned int i = 0; i < variations_length; i++)
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{
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unsigned int axis_index;
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if (hb_ot_var_find_axis (face, variations[i].tag, &axis_index, nullptr) &&
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axis_index < coords_length)
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coords[axis_index] = fvar.normalize_axis_value (axis_index, variations[i].value);
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}
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const OT::avar &avar = _get_avar (face);
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avar.map_coords (coords, coords_length);
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}
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/**
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* hb_ot_var_normalize_coords:
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*
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* Since: 1.4.2
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**/
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void
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hb_ot_var_normalize_coords (hb_face_t *face,
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unsigned int coords_length,
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const float *design_coords, /* IN */
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int *normalized_coords /* OUT */)
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{
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const OT::fvar &fvar = _get_fvar (face);
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for (unsigned int i = 0; i < coords_length; i++)
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normalized_coords[i] = fvar.normalize_axis_value (i, design_coords[i]);
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const OT::avar &avar = _get_avar (face);
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avar.map_coords (normalized_coords, coords_length);
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}
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