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 */ 106