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/*
* 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);
}
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