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Diffstat (limited to 'gfx/harfbuzz/src/hb-style.h')
| -rw-r--r-- | gfx/harfbuzz/src/hb-style.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-style.h b/gfx/harfbuzz/src/hb-style.h new file mode 100644 index 0000000000..d17d2daa5f --- /dev/null +++ b/gfx/harfbuzz/src/hb-style.h @@ -0,0 +1,81 @@ +/* + * 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 + **/ +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_style_tag_t style_tag); + +HB_END_DECLS + +#endif /* HB_STYLE_H */ |