Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-ft.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright © 2009 Red Hat, Inc.
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3 * Copyright © 2015 Google, Inc.
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4 *
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5 * This is part of HarfBuzz, a text shaping library.
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6 *
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7 * Permission is hereby granted, without written agreement and without
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8 * license or royalty fees, to use, copy, modify, and distribute this
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9 * software and its documentation for any purpose, provided that the
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10 * above copyright notice and the following two paragraphs appear in
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11 * all copies of this software.
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12 *
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13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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17 * DAMAGE.
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18 *
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19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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24 *
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25 * Red Hat Author(s): Behdad Esfahbod
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26 * Google Author(s): Behdad Esfahbod
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27 */
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29 #ifndef HB_FT_H
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30 #define HB_FT_H
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32 #include "hb.h"
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33
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34 #include <ft2build.h>
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35 #include FT_FREETYPE_H
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37 HB_BEGIN_DECLS
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38
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39 /*
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40 * Note: FreeType is not thread-safe.
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41 * Hence, these functions are not either.
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42 */
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43
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44 /*
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45 * hb-face from ft-face.
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46 */
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47
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48 /* This one creates a new hb-face for given ft-face.
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49 * When the returned hb-face is destroyed, the destroy
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50 * callback is called (if not NULL), with the ft-face passed
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51 * to it.
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52 *
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53 * The client is responsible to make sure that ft-face is
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54 * destroyed after hb-face is destroyed.
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55 *
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56 * Most often you don't want this function. You should use either
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57 * hb_ft_face_create_cached(), or hb_ft_face_create_referenced().
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58 * In particular, if you are going to pass NULL as destroy, you
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59 * probably should use (the more recent) hb_ft_face_create_referenced()
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60 * instead.
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61 */
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62 HB_EXTERN hb_face_t *
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63 hb_ft_face_create (FT_Face ft_face,
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64 hb_destroy_func_t destroy);
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65
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66 /* This version is like hb_ft_face_create(), except that it caches
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67 * the hb-face using the generic pointer of the ft-face. This means
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68 * that subsequent calls to this function with the same ft-face will
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69 * return the same hb-face (correctly referenced).
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70 *
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71 * Client is still responsible for making sure that ft-face is destroyed
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72 * after hb-face is.
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73 */
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74 HB_EXTERN hb_face_t *
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75 hb_ft_face_create_cached (FT_Face ft_face);
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76
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77 /* This version is like hb_ft_face_create(), except that it calls
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78 * FT_Reference_Face() on ft-face, as such keeping ft-face alive
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79 * as long as the hb-face is.
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80 *
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81 * This is the most convenient version to use. Use it unless you have
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82 * very good reasons not to.
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83 */
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84 HB_EXTERN hb_face_t *
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85 hb_ft_face_create_referenced (FT_Face ft_face);
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86
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87
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88 /*
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89 * hb-font from ft-face.
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90 */
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91
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92 /*
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93 * Note:
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94 *
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95 * Set face size on ft-face before creating hb-font from it.
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96 * Otherwise hb-ft would NOT pick up the font size correctly.
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97 */
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98
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99 /* See notes on hb_ft_face_create(). Same issues re lifecycle-management
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100 * apply here. Use hb_ft_font_create_referenced() if you can. */
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101 HB_EXTERN hb_font_t *
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102 hb_ft_font_create (FT_Face ft_face,
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103 hb_destroy_func_t destroy);
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104
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105 /* See notes on hb_ft_face_create_referenced() re lifecycle-management
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106 * issues. */
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107 HB_EXTERN hb_font_t *
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108 hb_ft_font_create_referenced (FT_Face ft_face);
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109
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110 HB_EXTERN FT_Face
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111 hb_ft_font_get_face (hb_font_t *font);
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112
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113 HB_EXTERN FT_Face
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114 hb_ft_font_lock_face (hb_font_t *font);
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115
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116 HB_EXTERN void
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117 hb_ft_font_unlock_face (hb_font_t *font);
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118
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119 HB_EXTERN void
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120 hb_ft_font_set_load_flags (hb_font_t *font, int load_flags);
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121
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122 HB_EXTERN int
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123 hb_ft_font_get_load_flags (hb_font_t *font);
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124
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125 /* Call when size or variations settings on underlying FT_Face changed,
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126 * and you want to update the hb_font_t from it. */
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127 HB_EXTERN void
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128 hb_ft_font_changed (hb_font_t *font);
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129
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130 /* Call when size or variations settings on underlying hb_font_t may have
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131 * changed, and you want to update the FT_Face from it. This call is fast
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132 * if nothing changed on hb_font_t. Returns true if changed. */
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133 HB_EXTERN hb_bool_t
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134 hb_ft_hb_font_changed (hb_font_t *font);
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135
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136 /* Makes an hb_font_t use FreeType internally to implement font functions.
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137 * Note: this internally creates an FT_Face. Use it when you create your
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138 * hb_face_t using hb_face_create(). */
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139 HB_EXTERN void
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140 hb_ft_font_set_funcs (hb_font_t *font);
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141
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142
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143 HB_END_DECLS
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144
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145 #endif /* HB_FT_H */