Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-style.h @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright © 2019 Ebrahim Byagowi
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3 *
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4 * This is part of HarfBuzz, a text shaping library.
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5 *
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6 * Permission is hereby granted, without written agreement and without
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7 * license or royalty fees, to use, copy, modify, and distribute this
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8 * software and its documentation for any purpose, provided that the
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9 * above copyright notice and the following two paragraphs appear in
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10 * all copies of this software.
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11 *
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12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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16 * DAMAGE.
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17 *
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18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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23 */
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24
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25 #if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
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26 #error "Include <hb.h> instead."
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27 #endif
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29 #ifndef HB_STYLE_H
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30 #define HB_STYLE_H
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31
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32 #include "hb.h"
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33
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34 HB_BEGIN_DECLS
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35
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36 /**
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37 * hb_style_tag_t:
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38 * @HB_STYLE_TAG_ITALIC: Used to vary between non-italic and italic.
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39 * A value of 0 can be interpreted as "Roman" (non-italic); a value of 1 can
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40 * be interpreted as (fully) italic.
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41 * @HB_STYLE_TAG_OPTICAL_SIZE: Used to vary design to suit different text sizes.
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42 * Non-zero. Values can be interpreted as text size, in points.
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43 * @HB_STYLE_TAG_SLANT_ANGLE: Used to vary between upright and slanted text. Values
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44 * must be greater than -90 and less than +90. Values can be interpreted as
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45 * the angle, in counter-clockwise degrees, of oblique slant from whatever the
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46 * designer considers to be upright for that font design. Typical right-leaning
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47 * Italic fonts have a negative slant angle (typically around -12)
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48 * @HB_STYLE_TAG_SLANT_RATIO: same as @HB_STYLE_TAG_SLANT_ANGLE expression as ratio.
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49 * Typical right-leaning Italic fonts have a positive slant ratio (typically around 0.2)
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50 * @HB_STYLE_TAG_WIDTH: Used to vary width of text from narrower to wider.
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51 * Non-zero. Values can be interpreted as a percentage of whatever the font
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52 * designer considers “normal width” for that font design.
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53 * @HB_STYLE_TAG_WEIGHT: Used to vary stroke thicknesses or other design details
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54 * to give variation from lighter to blacker. Values can be interpreted in direct
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55 * comparison to values for usWeightClass in the OS/2 table,
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56 * or the CSS font-weight property.
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57 *
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58 * Defined by [OpenType Design-Variation Axis Tag Registry](https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxisreg).
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59 *
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60 * Since: 3.0.0
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61 **/
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62 typedef enum
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63 {
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64 HB_STYLE_TAG_ITALIC = HB_TAG ('i','t','a','l'),
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65 HB_STYLE_TAG_OPTICAL_SIZE = HB_TAG ('o','p','s','z'),
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66 HB_STYLE_TAG_SLANT_ANGLE = HB_TAG ('s','l','n','t'),
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67 HB_STYLE_TAG_SLANT_RATIO = HB_TAG ('S','l','n','t'),
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68 HB_STYLE_TAG_WIDTH = HB_TAG ('w','d','t','h'),
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69 HB_STYLE_TAG_WEIGHT = HB_TAG ('w','g','h','t'),
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70
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71 /*< private >*/
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72 _HB_STYLE_TAG_MAX_VALUE = HB_TAG_MAX_SIGNED /*< skip >*/
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73 } hb_style_tag_t;
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74
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75
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76 HB_EXTERN float
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77 hb_style_get_value (hb_font_t *font, hb_style_tag_t style_tag);
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78
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79 HB_END_DECLS
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80
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81 #endif /* HB_STYLE_H */