hb-style.h File Reference

#include "hb.h"

Go to the source code of this file.

Enumerations
enum	hb_style_tag_t {   HB_STYLE_TAG_ITALIC = HB_TAG ('i','t','a','l') , HB_STYLE_TAG_OPTICAL_SIZE = HB_TAG ('o','p','s','z') , HB_STYLE_TAG_SLANT_ANGLE = HB_TAG ('s','l','n','t') , HB_STYLE_TAG_SLANT_RATIO = HB_TAG ('S','l','n','t') ,   HB_STYLE_TAG_WIDTH = HB_TAG ('w','d','t','h') , HB_STYLE_TAG_WEIGHT = HB_TAG ('w','g','h','t') , _HB_STYLE_TAG_MAX_VALUE = HB_TAG_MAX_SIGNED }

Functions
HB_EXTERN float	hb_style_get_value (hb_font_t *font, hb_style_tag_t style_tag)

Enumeration Type Documentation

hb_style_tag_t

enum hb_style_tag_t

hb_style_tag_t: @HB_STYLE_TAG_ITALIC: Used to vary between non-italic and italic. A value of 0 can be interpreted as "Roman" (non-italic); a value of 1 can be interpreted as (fully) italic. @HB_STYLE_TAG_OPTICAL_SIZE: Used to vary design to suit different text sizes. Non-zero. Values can be interpreted as text size, in points. @HB_STYLE_TAG_SLANT_ANGLE: Used to vary between upright and slanted text. Values must be greater than -90 and less than +90. Values can be interpreted as the angle, in counter-clockwise degrees, of oblique slant from whatever the designer considers to be upright for that font design. Typical right-leaning Italic fonts have a negative slant angle (typically around -12) @HB_STYLE_TAG_SLANT_RATIO: same as @HB_STYLE_TAG_SLANT_ANGLE expression as ratio. Typical right-leaning Italic fonts have a positive slant ratio (typically around 0.2) @HB_STYLE_TAG_WIDTH: Used to vary width of text from narrower to wider. Non-zero. Values can be interpreted as a percentage of whatever the font designer considers “normal width” for that font design. @HB_STYLE_TAG_WEIGHT: Used to vary stroke thicknesses or other design details to give variation from lighter to blacker. Values can be interpreted in direct comparison to values for usWeightClass in the OS/2 table, or the CSS font-weight property.

Defined by OpenType Design-Variation Axis Tag Registry.

Since: 3.0.0

Enumerator
HB_STYLE_TAG_ITALIC
HB_STYLE_TAG_OPTICAL_SIZE
HB_STYLE_TAG_SLANT_ANGLE
HB_STYLE_TAG_SLANT_RATIO
HB_STYLE_TAG_WIDTH
HB_STYLE_TAG_WEIGHT
_HB_STYLE_TAG_MAX_VALUE

Definition at line 62 of file hb-style.h.

{
  HB_STYLE_TAG_ITALIC       = HB_TAG ('i','t','a','l'),
  HB_STYLE_TAG_OPTICAL_SIZE = HB_TAG ('o','p','s','z'),
  HB_STYLE_TAG_SLANT_ANGLE  = HB_TAG ('s','l','n','t'),
  HB_STYLE_TAG_SLANT_RATIO  = HB_TAG ('S','l','n','t'),
  HB_STYLE_TAG_WIDTH        = HB_TAG ('w','d','t','h'),
  HB_STYLE_TAG_WEIGHT       = HB_TAG ('w','g','h','t'),
 
  /*< private >*/
  _HB_STYLE_TAG_MAX_VALUE   = HB_TAG_MAX_SIGNED /*< skip >*/
} hb_style_tag_t;

Function Documentation

hb_style_get_value()

HB_EXTERN float hb_style_get_value	(	hb_font_t *	font,
		hb_style_tag_t	style_tag )