210 lines
6.8 KiB
C
210 lines
6.8 KiB
C
|
/*
|
||
|
|
* 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 */
|