hb_ot_math_get_constant ()

hb_position_t
hb_ot_math_get_constant (hb_font_t *font,
                         hb_ot_math_constant_t constant);

This function returns the requested math constants as a hb_position_t. If the request constant is HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN, HB_OT_MATH_CONSTANT_SCRIPT_SCRIPT_PERCENT_SCALE_DOWN or HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN then the return value is actually an integer between 0 and 100 representing that percentage.

Since: 1.3.3

hb_ot_math_get_glyph_assembly ()

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,
                               hb_ot_math_glyph_part_t *parts,
                               hb_position_t *italics_correction);

This function tries to retrieve the GlyphAssembly for the specified font, glyph and direction. Note that only the value of HB_DIRECTION_IS_HORIZONTAL is considered. It provides the information necessary to draw the glyph assembly as an array of hb_ot_math_glyph_part_t.

Since: 1.3.3

hb_ot_math_get_glyph_italics_correction ()

hb_position_t
hb_ot_math_get_glyph_italics_correction
                               (hb_font_t *font,
                                hb_codepoint_t glyph);

Since: 1.3.3

hb_ot_math_get_glyph_kerning ()

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);

This function tries to retrieve the MathKern table for the specified font, glyph and hb_ot_math_kern_t. Then it browses the list of heights from the MathKern table to find one value that is greater or equal to specified correction_height. If one is found the corresponding value from the list of kerns is returned and otherwise the last kern value is returned.

Since: 1.3.3

hb_ot_math_get_glyph_top_accent_attachment ()

hb_position_t
hb_ot_math_get_glyph_top_accent_attachment
                               (hb_font_t *font,
                                hb_codepoint_t glyph);

Since: 1.3.3

hb_ot_math_get_glyph_variants ()

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,
                               hb_ot_math_glyph_variant_t *variants);

This function tries to retrieve the MathGlyphConstruction for the specified font, glyph and direction. Note that only the value of HB_DIRECTION_IS_HORIZONTAL is considered. It provides the corresponding list of size variants as an array of hb_ot_math_glyph_variant_t structs.

Since: 1.3.3

hb_ot_math_get_min_connector_overlap ()

hb_position_t
hb_ot_math_get_min_connector_overlap (hb_font_t *font,
                                      hb_direction_t direction);

This function tries to retrieve the MathVariants table for the specified font and returns the minimum overlap of connecting glyphs to draw a glyph assembly in the specified direction. Note that only the value of HB_DIRECTION_IS_HORIZONTAL is considered.

Since: 1.3.3

hb_ot_math_has_data ()

hb_bool_t
hb_ot_math_has_data (hb_face_t *face);

This function allows to verify the presence of an OpenType MATH table on the face. If so, such a table will be loaded into memory and sanitized. You can then safely call other functions for math layout and shaping.

Since: 1.3.3

hb_ot_math_is_glyph_extended_shape ()

hb_bool_t
hb_ot_math_is_glyph_extended_shape (hb_face_t *face,
                                    hb_codepoint_t glyph);

Since: 1.3.3

HB_OT_TAG_MATH

#define HB_OT_TAG_MATH HB_TAG('M','A','T','H')

HB_OT_MATH_SCRIPT

#define HB_OT_MATH_SCRIPT HB_TAG('m','a','t','h')

enum hb_ot_math_constant_t

Since: 1.3.3

enum hb_ot_math_glyph_part_flags_t

Since: 1.3.3

hb_ot_math_glyph_part_t

typedef struct {
  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;

Since: 1.3.3

hb_ot_math_glyph_variant_t

typedef struct {
  hb_codepoint_t glyph;
  hb_position_t advance;
} hb_ot_math_glyph_variant_t;

Since: 1.3.3

enum hb_ot_math_kern_t

Since: 1.3.3