hb-style

hb-style — Font Styles

Functions

float hb_style_get_value ()

Types and Values

Includes

#include <hb.h>

Description

Functions for fetching style information from fonts.

Functions

hb_style_get_value ()

float
hb_style_get_value (hb_font_t *font,
                    hb_style_tag_t style_tag);

Searches variation axes of a hb_font_t object for a specific axis first, if not set, then tries to get default style values from different tables of the font.

Parameters

font

a hb_font_t object.

 

style_tag

a style tag.

 

Returns

Corresponding axis or default value to a style tag.

Since: 3.0.0

Types and Values

enum hb_style_tag_t

Defined by OpenType Design-Variation Axis Tag Registry.

Members

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.

 

HB_STYLE_TAG_SLANT_RATIO

same as HB_STYLE_TAG_SLANT_ANGLE expression as ratio.

 

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.

 

Since: 3.0.0