/* * Copyright © 2019 Ebrahim Byagowi * * 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. */ #if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR) #error "Include <hb.h> instead." #endif #ifndef HB_STYLE_H #define HB_STYLE_H #include "hb.h" HB_BEGIN_DECLS /** * 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](https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxisreg). * * Since: 3.0.0 **/ hb_style_tag_t; HB_EXTERN float hb_style_get_value (hb_font_t *font, hb_style_tag_t style_tag); HB_END_DECLS #endif /* HB_STYLE_H */
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