/usr/include/harfbuzz/hb-ot-math.h is in libharfbuzz-dev 1.4.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | /*
* Copyright © 2016 Igalia S.L.
*
* 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.
*
* Igalia Author(s): Frédéric Wang
*/
#ifndef HB_OT_H_IN
#error "Include <hb-ot.h> instead."
#endif
#ifndef HB_OT_MATH_H
#define HB_OT_MATH_H
#include "hb.h"
HB_BEGIN_DECLS
/*
* MATH
*/
#define HB_OT_TAG_MATH HB_TAG('M','A','T','H')
/* Use with hb_buffer_set_script() for math shaping. */
#define HB_OT_MATH_SCRIPT HB_TAG('m','a','t','h')
/* Types */
/**
* hb_ot_math_constant_t:
*
* Since: 1.3.3
*/
typedef enum {
HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN = 0,
HB_OT_MATH_CONSTANT_SCRIPT_SCRIPT_PERCENT_SCALE_DOWN = 1,
HB_OT_MATH_CONSTANT_DELIMITED_SUB_FORMULA_MIN_HEIGHT = 2,
HB_OT_MATH_CONSTANT_DISPLAY_OPERATOR_MIN_HEIGHT = 3,
HB_OT_MATH_CONSTANT_MATH_LEADING = 4,
HB_OT_MATH_CONSTANT_AXIS_HEIGHT = 5,
HB_OT_MATH_CONSTANT_ACCENT_BASE_HEIGHT = 6,
HB_OT_MATH_CONSTANT_FLATTENED_ACCENT_BASE_HEIGHT = 7,
HB_OT_MATH_CONSTANT_SUBSCRIPT_SHIFT_DOWN = 8,
HB_OT_MATH_CONSTANT_SUBSCRIPT_TOP_MAX = 9,
HB_OT_MATH_CONSTANT_SUBSCRIPT_BASELINE_DROP_MIN = 10,
HB_OT_MATH_CONSTANT_SUPERSCRIPT_SHIFT_UP = 11,
HB_OT_MATH_CONSTANT_SUPERSCRIPT_SHIFT_UP_CRAMPED = 12,
HB_OT_MATH_CONSTANT_SUPERSCRIPT_BOTTOM_MIN = 13,
HB_OT_MATH_CONSTANT_SUPERSCRIPT_BASELINE_DROP_MAX = 14,
HB_OT_MATH_CONSTANT_SUB_SUPERSCRIPT_GAP_MIN = 15,
HB_OT_MATH_CONSTANT_SUPERSCRIPT_BOTTOM_MAX_WITH_SUBSCRIPT = 16,
HB_OT_MATH_CONSTANT_SPACE_AFTER_SCRIPT = 17,
HB_OT_MATH_CONSTANT_UPPER_LIMIT_GAP_MIN = 18,
HB_OT_MATH_CONSTANT_UPPER_LIMIT_BASELINE_RISE_MIN = 19,
HB_OT_MATH_CONSTANT_LOWER_LIMIT_GAP_MIN = 20,
HB_OT_MATH_CONSTANT_LOWER_LIMIT_BASELINE_DROP_MIN = 21,
HB_OT_MATH_CONSTANT_STACK_TOP_SHIFT_UP = 22,
HB_OT_MATH_CONSTANT_STACK_TOP_DISPLAY_STYLE_SHIFT_UP = 23,
HB_OT_MATH_CONSTANT_STACK_BOTTOM_SHIFT_DOWN = 24,
HB_OT_MATH_CONSTANT_STACK_BOTTOM_DISPLAY_STYLE_SHIFT_DOWN = 25,
HB_OT_MATH_CONSTANT_STACK_GAP_MIN = 26,
HB_OT_MATH_CONSTANT_STACK_DISPLAY_STYLE_GAP_MIN = 27,
HB_OT_MATH_CONSTANT_STRETCH_STACK_TOP_SHIFT_UP = 28,
HB_OT_MATH_CONSTANT_STRETCH_STACK_BOTTOM_SHIFT_DOWN = 29,
HB_OT_MATH_CONSTANT_STRETCH_STACK_GAP_ABOVE_MIN = 30,
HB_OT_MATH_CONSTANT_STRETCH_STACK_GAP_BELOW_MIN = 31,
HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_SHIFT_UP = 32,
HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_DISPLAY_STYLE_SHIFT_UP = 33,
HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_SHIFT_DOWN = 34,
HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_DISPLAY_STYLE_SHIFT_DOWN = 35,
HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_GAP_MIN = 36,
HB_OT_MATH_CONSTANT_FRACTION_NUM_DISPLAY_STYLE_GAP_MIN = 37,
HB_OT_MATH_CONSTANT_FRACTION_RULE_THICKNESS = 38,
HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_GAP_MIN = 39,
HB_OT_MATH_CONSTANT_FRACTION_DENOM_DISPLAY_STYLE_GAP_MIN = 40,
HB_OT_MATH_CONSTANT_SKEWED_FRACTION_HORIZONTAL_GAP = 41,
HB_OT_MATH_CONSTANT_SKEWED_FRACTION_VERTICAL_GAP = 42,
HB_OT_MATH_CONSTANT_OVERBAR_VERTICAL_GAP = 43,
HB_OT_MATH_CONSTANT_OVERBAR_RULE_THICKNESS = 44,
HB_OT_MATH_CONSTANT_OVERBAR_EXTRA_ASCENDER = 45,
HB_OT_MATH_CONSTANT_UNDERBAR_VERTICAL_GAP = 46,
HB_OT_MATH_CONSTANT_UNDERBAR_RULE_THICKNESS = 47,
HB_OT_MATH_CONSTANT_UNDERBAR_EXTRA_DESCENDER = 48,
HB_OT_MATH_CONSTANT_RADICAL_VERTICAL_GAP = 49,
HB_OT_MATH_CONSTANT_RADICAL_DISPLAY_STYLE_VERTICAL_GAP = 50,
HB_OT_MATH_CONSTANT_RADICAL_RULE_THICKNESS = 51,
HB_OT_MATH_CONSTANT_RADICAL_EXTRA_ASCENDER = 52,
HB_OT_MATH_CONSTANT_RADICAL_KERN_BEFORE_DEGREE = 53,
HB_OT_MATH_CONSTANT_RADICAL_KERN_AFTER_DEGREE = 54,
HB_OT_MATH_CONSTANT_RADICAL_DEGREE_BOTTOM_RAISE_PERCENT = 55
} hb_ot_math_constant_t;
/**
* hb_ot_math_kern_t:
*
* Since: 1.3.3
*/
typedef enum {
HB_OT_MATH_KERN_TOP_RIGHT = 0,
HB_OT_MATH_KERN_TOP_LEFT = 1,
HB_OT_MATH_KERN_BOTTOM_RIGHT = 2,
HB_OT_MATH_KERN_BOTTOM_LEFT = 3
} hb_ot_math_kern_t;
/**
* hb_ot_math_glyph_variant_t:
*
* Since: 1.3.3
*/
typedef struct hb_ot_math_glyph_variant_t {
hb_codepoint_t glyph;
hb_position_t advance;
} hb_ot_math_glyph_variant_t;
/**
* hb_ot_math_glyph_part_flags_t:
*
* Since: 1.3.3
*/
typedef enum { /*< flags >*/
HB_MATH_GLYPH_PART_FLAG_EXTENDER = 0x00000001u /* Extender glyph */
} hb_ot_math_glyph_part_flags_t;
/**
* hb_ot_math_glyph_part_t:
*
* Since: 1.3.3
*/
typedef struct hb_ot_math_glyph_part_t {
hb_codepoint_t glyph;
hb_position_t start_connector_length;
hb_position_t end_connector_length;
hb_position_t full_advance;
hb_ot_math_glyph_part_flags_t flags;
} hb_ot_math_glyph_part_t;
/* Methods */
HB_EXTERN hb_bool_t
hb_ot_math_has_data (hb_face_t *face);
HB_EXTERN hb_position_t
hb_ot_math_get_constant (hb_font_t *font,
hb_ot_math_constant_t constant);
HB_EXTERN hb_position_t
hb_ot_math_get_glyph_italics_correction (hb_font_t *font,
hb_codepoint_t glyph);
HB_EXTERN hb_position_t
hb_ot_math_get_glyph_top_accent_attachment (hb_font_t *font,
hb_codepoint_t glyph);
HB_EXTERN hb_bool_t
hb_ot_math_is_glyph_extended_shape (hb_face_t *face,
hb_codepoint_t glyph);
HB_EXTERN hb_position_t
hb_ot_math_get_glyph_kerning (hb_font_t *font,
hb_codepoint_t glyph,
hb_ot_math_kern_t kern,
hb_position_t correction_height);
HB_EXTERN unsigned int
hb_ot_math_get_glyph_variants (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
unsigned int start_offset,
unsigned int *variants_count, /* IN/OUT */
hb_ot_math_glyph_variant_t *variants /* OUT */);
HB_EXTERN hb_position_t
hb_ot_math_get_min_connector_overlap (hb_font_t *font,
hb_direction_t direction);
HB_EXTERN unsigned int
hb_ot_math_get_glyph_assembly (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
unsigned int start_offset,
unsigned int *parts_count, /* IN/OUT */
hb_ot_math_glyph_part_t *parts, /* OUT */
hb_position_t *italics_correction /* OUT */);
HB_END_DECLS
#endif /* HB_OT_MATH_H */
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