diff options
Diffstat (limited to 'gfx/harfbuzz/src/hb-ot-math.h')
| -rw-r--r-- | gfx/harfbuzz/src/hb-ot-math.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-math.h b/gfx/harfbuzz/src/hb-ot-math.h new file mode 100644 index 000000000..521a5ca03 --- /dev/null +++ b/gfx/harfbuzz/src/hb-ot-math.h @@ -0,0 +1,209 @@ +/* + * 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 */ |