1 /*

     2  * Copyright © 2017  Google, Inc.

     3  *

     4  *  This is part of HarfBuzz, a text shaping library.

     5  *

     6  * Permission is hereby granted, without written agreement and without

     7  * license or royalty fees, to use, copy, modify, and distribute this

     8  * software and its documentation for any purpose, provided that the

     9  * above copyright notice and the following two paragraphs appear in

    10  * all copies of this software.

    11  *

    12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR

    13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

    14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN

    15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

    16  * DAMAGE.

    17  *

    18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,

    19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

    20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

    21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO

    22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

    23  *

    24  * Red Hat Author(s): Behdad Esfahbod

    25  */

    26 

    27 #ifndef HB_OT_H_IN

    28 #error "Include <hb-ot.h> instead."

    29 #endif

    30 

    31 #ifndef HB_OT_VAR_H

    32 #define HB_OT_VAR_H

    33 

    34 #include "hb.h"

    35 

    36 HB_BEGIN_DECLS

    37 

    38 

    39 #define HB_OT_TAG_VAR_AXIS_ITALIC       HB_TAG('i','t','a','l')

    40 #define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z')

    41 #define HB_OT_TAG_VAR_AXIS_SLANT        HB_TAG('s','l','n','t')

    42 #define HB_OT_TAG_VAR_AXIS_WIDTH        HB_TAG('w','d','t','h')

    43 #define HB_OT_TAG_VAR_AXIS_WEIGHT       HB_TAG('w','g','h','t')

    44 

    45 

    46 /*

    47  * fvar / avar

    48  */

    49 

    50 /**

    51  * hb_ot_var_axis_t:

    52  *

    53  * Since: 1.4.2

    54  */

    55 typedef struct hb_ot_var_axis_t {

    56   hb_tag_t tag;

    57   unsigned int name_id;

    58   float min_value;

    59   float default_value;

    60   float max_value;

    61 } hb_ot_var_axis_t;

    62 

    63 HB_EXTERN hb_bool_t

    64 hb_ot_var_has_data (hb_face_t *face);

    65 

    66 /**

    67  * HB_OT_VAR_NO_AXIS_INDEX:

    68  *

    69  * Since: 1.4.2

    70  */

    71 #define HB_OT_VAR_NO_AXIS_INDEX         0xFFFFFFFFu

    72 

    73 HB_EXTERN unsigned int

    74 hb_ot_var_get_axis_count (hb_face_t *face);

    75 

    76 HB_EXTERN unsigned int

    77 hb_ot_var_get_axes (hb_face_t        *face,

    78                     unsigned int      start_offset,

    79                     unsigned int     *axes_count /* IN/OUT */,

    80                     hb_ot_var_axis_t *axes_array /* OUT */);

    81 

    82 HB_EXTERN hb_bool_t

    83 hb_ot_var_find_axis (hb_face_t        *face,

    84                      hb_tag_t          axis_tag,

    85                      unsigned int     *axis_index,

    86                      hb_ot_var_axis_t *axis_info);

    87 

    88 

    89 HB_EXTERN void

    90 hb_ot_var_normalize_variations (hb_face_t            *face,

    91                                 const hb_variation_t *variations, /* IN */

    92                                 unsigned int          variations_length,

    93                                 int                  *coords, /* OUT */

    94                                 unsigned int          coords_length);

    95 

    96 HB_EXTERN void

    97 hb_ot_var_normalize_coords (hb_face_t    *face,

    98                             unsigned int coords_length,

    99                             const float *design_coords, /* IN */

   100                             int *normalized_coords /* OUT */);

   101 

   102 

   103 HB_END_DECLS

   104 

   105 #endif /* HB_OT_VAR_H */