147 lines
3.8 KiB
C
147 lines
3.8 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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* Red Hat Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_H_IN
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#error "Include <hb-ot.h> instead."
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#endif
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#ifndef HB_OT_VAR_H
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#define HB_OT_VAR_H
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#include "hb.h"
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HB_BEGIN_DECLS
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#define HB_OT_TAG_VAR_AXIS_ITALIC HB_TAG('i','t','a','l')
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#define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z')
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#define HB_OT_TAG_VAR_AXIS_SLANT HB_TAG('s','l','n','t')
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#define HB_OT_TAG_VAR_AXIS_WIDTH HB_TAG('w','d','t','h')
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#define HB_OT_TAG_VAR_AXIS_WEIGHT HB_TAG('w','g','h','t')
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/*
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* fvar / avar
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*/
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HB_EXTERN hb_bool_t
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hb_ot_var_has_data (hb_face_t *face);
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/*
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* Variation axes.
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*/
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HB_EXTERN unsigned int
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hb_ot_var_get_axis_count (hb_face_t *face);
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/**
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* hb_ot_var_axis_flags_t:
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* @HB_OT_VAR_AXIS_FLAG_HIDDEN: The axis should not be exposed directly in user interfaces.
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*
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* Since: 2.2.0
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*/
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typedef enum { /*< flags >*/
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HB_OT_VAR_AXIS_FLAG_HIDDEN = 0x00000001u,
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_HB_OT_VAR_AXIS_FLAG_MAX_VALUE= 0x7FFFFFFFu /*< skip >*/
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} hb_ot_var_axis_flags_t;
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/**
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* hb_ot_var_axis_info_t:
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*
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* Since: 2.2.0
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*/
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typedef struct hb_ot_var_axis_info_t
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{
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unsigned int axis_index;
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hb_tag_t tag;
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hb_ot_name_id_t name_id;
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hb_ot_var_axis_flags_t flags;
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float min_value;
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float default_value;
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float max_value;
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/*< private >*/
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unsigned int reserved;
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} hb_ot_var_axis_info_t;
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HB_EXTERN unsigned int
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hb_ot_var_get_axis_infos (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_info_t *axes_array /* OUT */);
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HB_EXTERN hb_bool_t
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hb_ot_var_find_axis_info (hb_face_t *face,
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hb_tag_t axis_tag,
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hb_ot_var_axis_info_t *axis_info);
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/*
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* Named instances.
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*/
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HB_EXTERN unsigned int
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hb_ot_var_get_named_instance_count (hb_face_t *face);
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HB_EXTERN hb_ot_name_id_t
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hb_ot_var_named_instance_get_subfamily_name_id (hb_face_t *face,
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unsigned int instance_index);
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HB_EXTERN hb_ot_name_id_t
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hb_ot_var_named_instance_get_postscript_name_id (hb_face_t *face,
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unsigned int instance_index);
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HB_EXTERN unsigned int
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hb_ot_var_named_instance_get_design_coords (hb_face_t *face,
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unsigned int instance_index,
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unsigned int *coords_length, /* IN/OUT */
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float *coords /* OUT */);
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/*
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* Conversions.
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*/
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HB_EXTERN 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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HB_EXTERN 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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HB_END_DECLS
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#endif /* HB_OT_VAR_H */
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