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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.
*
* Red Hat Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_H_IN
#error "Include <hb-ot.h> instead."
#endif
#ifndef HB_OT_VAR_H
#define HB_OT_VAR_H
#include "hb.h"
HB_BEGIN_DECLS
/**
* hb_tag_t:
* @HB_OT_TAG_VAR_AXIS_ITALIC: Registered tag for the roman/italic axis
*/
#define HB_OT_TAG_VAR_AXIS_ITALIC HB_TAG('i','t','a','l')
/**
* hb_tag_t:
* @HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE: Registered tag for the optical-size axis
*
* <note>Note: The optical-size axis supersedes the OpenType `size` feature.</note>
*/
#define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z')
/**
* hb_tag_t:
* @HB_OT_TAG_VAR_AXIS_SLANT: Registered tag for the slant axis
*/
#define HB_OT_TAG_VAR_AXIS_SLANT HB_TAG('s','l','n','t')
/**
* hb_tag_t:
* @HB_OT_TAG_VAR_AXIS_WIDTH: Registered tag for the width axis
*/
#define HB_OT_TAG_VAR_AXIS_WIDTH HB_TAG('w','d','t','h')
/**
* hb_tag_t:
* @HB_OT_TAG_VAR_AXIS_WEIGHT: Registered tag for the weight axis
*/
#define HB_OT_TAG_VAR_AXIS_WEIGHT HB_TAG('w','g','h','t')
/*
* fvar / avar
*/
HB_EXTERN hb_bool_t
hb_ot_var_has_data (hb_face_t *face);
/*
* Variation axes.
*/
HB_EXTERN unsigned int
hb_ot_var_get_axis_count (hb_face_t *face);
/**
* hb_ot_var_axis_flags_t:
* @HB_OT_VAR_AXIS_FLAG_HIDDEN: The axis should not be exposed directly in user interfaces.
*
* Since: 2.2.0
*/
typedef enum { /*< flags >*/
HB_OT_VAR_AXIS_FLAG_HIDDEN = 0x00000001u,
_HB_OT_VAR_AXIS_FLAG_MAX_VALUE= HB_TAG_MAX_SIGNED /*< skip >*/
} hb_ot_var_axis_flags_t;
/**
* hb_ot_var_axis_info_t:
* @axis_index: Index of the axis in the variation-axis array
* @tag: The #hb_tag_t tag identifying the design variation of the axis
* @name_id: The `name` table Name ID that provides display names for the axis
* @flags: The #hb_ot_var_axis_flags_t flags for the axis
* @min_value: The mininum value on the variation axis that the font covers
* @default_value: The position on the variation axis corresponding to the font's defaults
* @max_value: The maximum value on the variation axis that the font covers
*
* Data type for holding variation-axis values.
*
* The minimum, default, and maximum values are in un-normalized, user scales.
*
* <note>Note: at present, the only flag defined for @flags is
* #HB_OT_VAR_AXIS_FLAG_HIDDEN.</note>
*
* Since: 2.2.0
*/
typedef struct hb_ot_var_axis_info_t {
unsigned int axis_index;
hb_tag_t tag;
hb_ot_name_id_t name_id;
hb_ot_var_axis_flags_t flags;
float min_value;
float default_value;
float max_value;
/*< private >*/
unsigned int reserved;
} hb_ot_var_axis_info_t;
HB_EXTERN unsigned int
hb_ot_var_get_axis_infos (hb_face_t *face,
unsigned int start_offset,
unsigned int *axes_count /* IN/OUT */,
hb_ot_var_axis_info_t *axes_array /* OUT */);
HB_EXTERN hb_bool_t
hb_ot_var_find_axis_info (hb_face_t *face,
hb_tag_t axis_tag,
hb_ot_var_axis_info_t *axis_info);
/*
* Named instances.
*/
HB_EXTERN unsigned int
hb_ot_var_get_named_instance_count (hb_face_t *face);
HB_EXTERN hb_ot_name_id_t
hb_ot_var_named_instance_get_subfamily_name_id (hb_face_t *face,
unsigned int instance_index);
HB_EXTERN hb_ot_name_id_t
hb_ot_var_named_instance_get_postscript_name_id (hb_face_t *face,
unsigned int instance_index);
HB_EXTERN unsigned int
hb_ot_var_named_instance_get_design_coords (hb_face_t *face,
unsigned int instance_index,
unsigned int *coords_length, /* IN/OUT */
float *coords /* OUT */);
/*
* Conversions.
*/
HB_EXTERN 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);
HB_EXTERN void
hb_ot_var_normalize_coords (hb_face_t *face,
unsigned int coords_length,
const float *design_coords, /* IN */
int *normalized_coords /* OUT */);
HB_END_DECLS
#endif /* HB_OT_VAR_H */
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