diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-style.h')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-style.h | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/thirdparty/harfbuzz/src/hb-style.h b/thirdparty/harfbuzz/src/hb-style.h index f5776cee58..30a6f2b878 100644 --- a/thirdparty/harfbuzz/src/hb-style.h +++ b/thirdparty/harfbuzz/src/hb-style.h @@ -33,10 +33,46 @@ HB_BEGIN_DECLS -#ifdef HB_EXPERIMENTAL_API +/** + * 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. + * @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. + * + * Defined by [OpenType Design-Variation Axis Tag Registry](https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxisreg). + * + * Since: 3.0.0 + **/ +typedef enum +{ + 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; + + HB_EXTERN float -hb_style_get_value (hb_font_t *font, hb_tag_t style_tag); -#endif +hb_style_get_value (hb_font_t *font, hb_style_tag_t style_tag); HB_END_DECLS |