1 /* |
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2 * Copyright © 2007,2008,2009 Red Hat, Inc. |
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3 * Copyright © 2012,2013 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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28 |
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29 #ifndef HB_OT_LAYOUT_PRIVATE_HH |
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30 #define HB_OT_LAYOUT_PRIVATE_HH |
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31 |
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32 #include "hb-private.hh" |
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33 |
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34 #include "hb-font-private.hh" |
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35 #include "hb-buffer-private.hh" |
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36 #include "hb-set-digest-private.hh" |
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37 #include "hb-open-type-private.hh" |
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38 |
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39 |
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40 /* Private API corresponding to hb-ot-layout.h: */ |
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41 |
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42 HB_INTERNAL hb_bool_t |
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43 hb_ot_layout_table_find_feature (hb_face_t *face, |
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44 hb_tag_t table_tag, |
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45 hb_tag_t feature_tag, |
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46 unsigned int *feature_index); |
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47 |
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48 |
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49 /* |
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50 * GDEF |
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51 */ |
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52 |
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53 enum hb_ot_layout_glyph_props_flags_t |
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54 { |
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55 /* The following three match LookupFlags::Ignore* numbers. */ |
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56 HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u, |
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57 HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u, |
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58 HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u, |
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59 |
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60 /* The following are used internally; not derived from GDEF. */ |
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61 HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u, |
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62 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u, |
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63 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u, |
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64 |
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65 HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED | |
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66 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | |
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67 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED |
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68 }; |
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69 HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t); |
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70 |
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71 |
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72 /* |
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73 * GSUB/GPOS |
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74 */ |
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75 |
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76 HB_INTERNAL hb_bool_t |
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77 hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face, |
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78 unsigned int lookup_index, |
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79 const hb_codepoint_t *glyphs, |
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80 unsigned int glyphs_length, |
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81 hb_bool_t zero_context); |
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82 |
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83 |
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84 /* Should be called before all the substitute_lookup's are done. */ |
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85 HB_INTERNAL void |
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86 hb_ot_layout_substitute_start (hb_font_t *font, |
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87 hb_buffer_t *buffer); |
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88 |
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89 |
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90 struct hb_ot_layout_lookup_accelerator_t; |
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91 |
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92 namespace OT { |
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93 struct hb_ot_apply_context_t; |
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94 struct SubstLookup; |
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95 } |
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96 |
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97 HB_INTERNAL void |
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98 hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c, |
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99 const OT::SubstLookup &lookup, |
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100 const hb_ot_layout_lookup_accelerator_t &accel); |
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101 |
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102 |
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103 /* Should be called before all the position_lookup's are done. */ |
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104 HB_INTERNAL void |
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105 hb_ot_layout_position_start (hb_font_t *font, |
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106 hb_buffer_t *buffer); |
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107 |
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108 /* Should be called after all the position_lookup's are done, to fini advances. */ |
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109 HB_INTERNAL void |
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110 hb_ot_layout_position_finish_advances (hb_font_t *font, |
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111 hb_buffer_t *buffer); |
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112 |
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113 /* Should be called after hb_ot_layout_position_finish_advances, to fini offsets. */ |
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114 HB_INTERNAL void |
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115 hb_ot_layout_position_finish_offsets (hb_font_t *font, |
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116 hb_buffer_t *buffer); |
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117 |
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118 |
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119 |
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120 /* |
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121 * hb_ot_layout_t |
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122 */ |
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123 |
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124 namespace OT { |
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125 struct BASE; |
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126 struct COLR; |
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127 struct CPAL; |
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128 struct GDEF; |
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129 struct GSUB; |
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130 struct GPOS; |
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131 struct MATH; |
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132 struct fvar; |
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133 struct avar; |
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134 } |
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135 |
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136 namespace AAT { |
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137 struct ankr; |
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138 struct kerx; |
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139 struct morx; |
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140 struct trak; |
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141 } |
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142 |
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143 struct hb_ot_layout_lookup_accelerator_t |
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144 { |
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145 template <typename TLookup> |
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146 inline void init (const TLookup &lookup) |
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147 { |
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148 digest.init (); |
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149 lookup.add_coverage (&digest); |
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150 } |
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151 |
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152 inline void fini (void) |
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153 { |
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154 } |
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155 |
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156 inline bool may_have (hb_codepoint_t g) const { |
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157 return digest.may_have (g); |
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158 } |
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159 |
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160 private: |
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161 hb_set_digest_t digest; |
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162 }; |
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163 |
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164 struct hb_ot_layout_t |
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165 { |
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166 hb_blob_t *gdef_blob; |
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167 hb_blob_t *gsub_blob; |
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168 hb_blob_t *gpos_blob; |
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169 |
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170 const struct OT::GDEF *gdef; |
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171 const struct OT::GSUB *gsub; |
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172 const struct OT::GPOS *gpos; |
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173 |
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174 /* TODO Move the following out of this struct. */ |
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175 OT::hb_table_lazy_loader_t<struct OT::BASE> base; |
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176 OT::hb_table_lazy_loader_t<struct OT::MATH> math; |
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177 OT::hb_table_lazy_loader_t<struct OT::fvar> fvar; |
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178 OT::hb_table_lazy_loader_t<struct OT::avar> avar; |
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179 |
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180 unsigned int gsub_lookup_count; |
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181 unsigned int gpos_lookup_count; |
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182 |
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183 hb_ot_layout_lookup_accelerator_t *gsub_accels; |
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184 hb_ot_layout_lookup_accelerator_t *gpos_accels; |
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185 }; |
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186 |
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187 |
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188 HB_INTERNAL hb_ot_layout_t * |
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189 _hb_ot_layout_create (hb_face_t *face); |
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190 |
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191 HB_INTERNAL void |
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192 _hb_ot_layout_destroy (hb_ot_layout_t *layout); |
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193 |
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194 |
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195 #define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot) |
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196 |
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197 |
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198 /* |
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199 * Buffer var routines. |
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200 */ |
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201 |
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202 /* buffer var allocations, used during the entire shaping process */ |
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203 #define unicode_props() var2.u16[0] |
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204 |
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205 /* buffer var allocations, used during the GSUB/GPOS processing */ |
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206 #define glyph_props() var1.u16[0] /* GDEF glyph properties */ |
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207 #define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */ |
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208 #define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */ |
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209 |
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210 |
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211 /* Loop over syllables. Based on foreach_cluster(). */ |
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212 #define foreach_syllable(buffer, start, end) \ |
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213 for (unsigned int \ |
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214 _count = buffer->len, \ |
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215 start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \ |
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216 start < _count; \ |
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217 start = end, end = _next_syllable (buffer, start)) |
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218 |
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219 static inline unsigned int |
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220 _next_syllable (hb_buffer_t *buffer, unsigned int start) |
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221 { |
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222 hb_glyph_info_t *info = buffer->info; |
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223 unsigned int count = buffer->len; |
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224 |
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225 unsigned int syllable = info[start].syllable(); |
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226 while (++start < count && syllable == info[start].syllable()) |
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227 ; |
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228 |
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229 return start; |
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230 } |
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231 |
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232 |
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233 /* unicode_props */ |
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234 |
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235 /* Design: |
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236 * unicode_props() is a two-byte number. The low byte includes: |
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237 * - General_Category: 5 bits. |
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238 * - A bit each for: |
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239 * * Is it Default_Ignorable(); we have a modified Default_Ignorable(). |
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240 * * Whether it's one of the three Mongolian Free Variation Selectors, |
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241 * CGJ, or other characters that are hidden but should not be ignored |
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242 * like most other Default_Ignorable()s do during matching. |
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243 * * One free bit right now. |
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244 * |
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245 * The high-byte has different meanings, switched by the Gen-Cat: |
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246 * - For Mn,Mc,Me: the modified Combining_Class. |
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247 * - For Cf: whether it's ZWJ, ZWNJ, or something else. |
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248 * - For Ws: index of which space character this is, if space fallback |
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249 * is needed, ie. we don't set this by default, only if asked to. |
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250 */ |
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251 |
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252 enum hb_unicode_props_flags_t { |
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253 UPROPS_MASK_GEN_CAT = 0x001Fu, |
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254 UPROPS_MASK_IGNORABLE = 0x0020u, |
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255 UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, |
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256 * or TAG characters */ |
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257 |
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258 /* If GEN_CAT=FORMAT, top byte masks: */ |
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259 UPROPS_MASK_Cf_ZWJ = 0x0100u, |
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260 UPROPS_MASK_Cf_ZWNJ = 0x0200u |
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261 }; |
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262 HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t); |
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263 |
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264 static inline void |
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265 _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer) |
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266 { |
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267 hb_unicode_funcs_t *unicode = buffer->unicode; |
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268 unsigned int u = info->codepoint; |
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269 unsigned int gen_cat = (unsigned int) unicode->general_category (u); |
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270 unsigned int props = gen_cat; |
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271 |
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272 if (u >= 0x80) |
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273 { |
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274 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII; |
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275 if (unlikely (unicode->is_default_ignorable (u))) |
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276 { |
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277 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES; |
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278 props |= UPROPS_MASK_IGNORABLE; |
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279 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ; |
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280 else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ; |
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281 /* Mongolian Free Variation Selectors need to be remembered |
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282 * because although we need to hide them like default-ignorables, |
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283 * they need to non-ignorable during shaping. This is similar to |
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284 * what we do for joiners in Indic-like shapers, but since the |
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285 * FVSes are GC=Mn, we have use a separate bit to remember them. |
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286 * Fixes: |
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287 * https://github.com/harfbuzz/harfbuzz/issues/234 */ |
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288 else if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN; |
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289 /* TAG characters need similar treatment. Fixes: |
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290 * https://github.com/harfbuzz/harfbuzz/issues/463 */ |
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291 else if (unlikely (hb_in_range (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN; |
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292 /* COMBINING GRAPHEME JOINER should not be skipped; at least some times. |
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293 * https://github.com/harfbuzz/harfbuzz/issues/554 */ |
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294 else if (unlikely (u == 0x034Fu)) |
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295 { |
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296 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_CGJ; |
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297 props |= UPROPS_MASK_HIDDEN; |
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298 } |
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299 } |
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300 else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat))) |
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301 { |
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302 /* The above check is just an optimization to let in only things we need further |
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303 * processing on. */ |
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304 |
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305 /* Only Mn and Mc can have non-zero ccc: |
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306 * https://unicode.org/policies/stability_policy.html#Property_Value |
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307 * """ |
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308 * Canonical_Combining_Class, General_Category |
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309 * All characters other than those with General_Category property values |
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310 * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class |
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311 * property value 0. |
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312 * 1.1.5+ |
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313 * """ |
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314 * |
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315 * Also, all Mn's that are Default_Ignorable, have ccc=0, hence |
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316 * the "else if". |
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317 */ |
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318 props |= unicode->modified_combining_class (info->codepoint)<<8; |
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319 |
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320 /* Recategorize emoji skin-tone modifiers as Unicode mark, so they |
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321 * behave correctly in non-native directionality. They originally |
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322 * are MODIFIER_SYMBOL. Fixes: |
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323 * https://github.com/harfbuzz/harfbuzz/issues/169 |
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324 */ |
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325 if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu))) |
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326 { |
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327 props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK; |
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328 } |
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329 } |
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330 } |
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331 |
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332 info->unicode_props() = props; |
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333 } |
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334 |
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335 static inline void |
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336 _hb_glyph_info_set_general_category (hb_glyph_info_t *info, |
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337 hb_unicode_general_category_t gen_cat) |
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338 { |
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339 /* Clears top-byte. */ |
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340 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT)); |
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341 } |
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342 |
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343 static inline hb_unicode_general_category_t |
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344 _hb_glyph_info_get_general_category (const hb_glyph_info_t *info) |
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345 { |
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346 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
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347 } |
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348 |
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349 static inline bool |
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350 _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info) |
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351 { |
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352 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
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353 } |
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354 static inline void |
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355 _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, |
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356 unsigned int modified_class) |
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357 { |
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358 if (unlikely (!_hb_glyph_info_is_unicode_mark (info))) |
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359 return; |
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360 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF); |
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361 } |
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362 static inline unsigned int |
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363 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) |
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364 { |
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365 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0; |
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366 } |
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367 |
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368 |
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369 /* Loop over grapheme. Based on foreach_cluster(). */ |
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370 #define foreach_grapheme(buffer, start, end) \ |
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371 for (unsigned int \ |
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372 _count = buffer->len, \ |
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373 start = 0, end = _count ? _next_grapheme (buffer, 0) : 0; \ |
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374 start < _count; \ |
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375 start = end, end = _next_grapheme (buffer, start)) |
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376 |
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377 static inline unsigned int |
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378 _next_grapheme (hb_buffer_t *buffer, unsigned int start) |
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379 { |
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380 hb_glyph_info_t *info = buffer->info; |
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381 unsigned int count = buffer->len; |
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382 |
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383 while (++start < count && _hb_glyph_info_is_unicode_mark (&info[start])) |
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384 ; |
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385 |
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386 return start; |
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387 } |
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388 |
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389 |
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390 #define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info))) |
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391 |
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392 static inline bool |
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393 _hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info) |
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394 { |
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395 return _hb_glyph_info_get_general_category (info) == |
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396 HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR; |
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397 } |
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398 static inline void |
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399 _hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s) |
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400 { |
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401 if (unlikely (!_hb_glyph_info_is_unicode_space (info))) |
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402 return; |
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403 info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF); |
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404 } |
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405 static inline hb_unicode_funcs_t::space_t |
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406 _hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info) |
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407 { |
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408 return _hb_glyph_info_is_unicode_space (info) ? |
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409 (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) : |
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410 hb_unicode_funcs_t::NOT_SPACE; |
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411 } |
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412 |
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413 static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info); |
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414 |
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415 static inline hb_bool_t |
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416 _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) |
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417 { |
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418 return (info->unicode_props() & UPROPS_MASK_IGNORABLE) && |
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419 !_hb_glyph_info_ligated (info); |
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420 } |
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421 static inline hb_bool_t |
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422 _hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info) |
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423 { |
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424 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN)) |
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425 == UPROPS_MASK_IGNORABLE) && |
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426 !_hb_glyph_info_ligated (info); |
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427 } |
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428 static inline void |
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429 _hb_glyph_info_unhide (hb_glyph_info_t *info) |
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430 { |
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431 info->unicode_props() &= ~ UPROPS_MASK_HIDDEN; |
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432 } |
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433 |
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434 static inline bool |
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435 _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info) |
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436 { |
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437 return _hb_glyph_info_get_general_category (info) == |
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438 HB_UNICODE_GENERAL_CATEGORY_FORMAT; |
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439 } |
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440 static inline hb_bool_t |
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441 _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) |
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442 { |
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443 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ); |
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444 } |
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445 static inline hb_bool_t |
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446 _hb_glyph_info_is_zwj (const hb_glyph_info_t *info) |
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447 { |
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448 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ); |
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449 } |
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450 static inline hb_bool_t |
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451 _hb_glyph_info_is_joiner (const hb_glyph_info_t *info) |
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452 { |
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453 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ)); |
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454 } |
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455 static inline void |
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456 _hb_glyph_info_flip_joiners (hb_glyph_info_t *info) |
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457 { |
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458 if (!_hb_glyph_info_is_unicode_format (info)) |
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459 return; |
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460 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ; |
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461 } |
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462 |
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463 /* lig_props: aka lig_id / lig_comp |
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464 * |
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465 * When a ligature is formed: |
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466 * |
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467 * - The ligature glyph and any marks in between all the same newly allocated |
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468 * lig_id, |
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469 * - The ligature glyph will get lig_num_comps set to the number of components |
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470 * - The marks get lig_comp > 0, reflecting which component of the ligature |
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471 * they were applied to. |
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472 * - This is used in GPOS to attach marks to the right component of a ligature |
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473 * in MarkLigPos, |
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474 * - Note that when marks are ligated together, much of the above is skipped |
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475 * and the current lig_id reused. |
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476 * |
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477 * When a multiple-substitution is done: |
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478 * |
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479 * - All resulting glyphs will have lig_id = 0, |
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480 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively. |
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481 * - This is used in GPOS to attach marks to the first component of a |
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482 * multiple substitution in MarkBasePos. |
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483 * |
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484 * The numbers are also used in GPOS to do mark-to-mark positioning only |
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485 * to marks that belong to the same component of the same ligature. |
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486 */ |
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487 |
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488 static inline void |
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489 _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) |
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490 { |
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491 info->lig_props() = 0; |
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492 } |
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493 |
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494 #define IS_LIG_BASE 0x10 |
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495 |
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496 static inline void |
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497 _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, |
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498 unsigned int lig_id, |
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499 unsigned int lig_num_comps) |
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500 { |
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501 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); |
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502 } |
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503 |
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504 static inline void |
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505 _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, |
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506 unsigned int lig_id, |
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507 unsigned int lig_comp) |
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508 { |
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509 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); |
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510 } |
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511 |
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512 static inline void |
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513 _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) |
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514 { |
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515 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp); |
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516 } |
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517 |
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518 static inline unsigned int |
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519 _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) |
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520 { |
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521 return info->lig_props() >> 5; |
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522 } |
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523 |
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524 static inline bool |
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525 _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) |
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526 { |
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527 return !!(info->lig_props() & IS_LIG_BASE); |
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528 } |
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529 |
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530 static inline unsigned int |
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531 _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) |
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532 { |
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533 if (_hb_glyph_info_ligated_internal (info)) |
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534 return 0; |
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535 else |
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536 return info->lig_props() & 0x0F; |
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537 } |
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538 |
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539 static inline unsigned int |
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540 _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) |
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541 { |
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542 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && |
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543 _hb_glyph_info_ligated_internal (info)) |
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544 return info->lig_props() & 0x0F; |
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545 else |
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546 return 1; |
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547 } |
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548 |
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549 static inline uint8_t |
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550 _hb_allocate_lig_id (hb_buffer_t *buffer) { |
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551 uint8_t lig_id = buffer->next_serial () & 0x07; |
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552 if (unlikely (!lig_id)) |
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553 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ |
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554 return lig_id; |
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555 } |
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556 |
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557 /* glyph_props: */ |
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558 |
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559 static inline void |
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560 _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) |
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561 { |
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562 info->glyph_props() = props; |
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563 } |
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564 |
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565 static inline unsigned int |
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566 _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) |
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567 { |
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568 return info->glyph_props(); |
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569 } |
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570 |
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571 static inline bool |
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572 _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) |
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573 { |
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574 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); |
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575 } |
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576 |
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577 static inline bool |
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578 _hb_glyph_info_is_ligature (const hb_glyph_info_t *info) |
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579 { |
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580 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE); |
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581 } |
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582 |
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583 static inline bool |
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584 _hb_glyph_info_is_mark (const hb_glyph_info_t *info) |
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585 { |
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586 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK); |
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587 } |
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588 |
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589 static inline bool |
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590 _hb_glyph_info_substituted (const hb_glyph_info_t *info) |
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591 { |
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592 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); |
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593 } |
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594 |
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595 static inline bool |
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596 _hb_glyph_info_ligated (const hb_glyph_info_t *info) |
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597 { |
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598 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED); |
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599 } |
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600 |
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601 static inline bool |
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602 _hb_glyph_info_multiplied (const hb_glyph_info_t *info) |
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603 { |
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604 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); |
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605 } |
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606 |
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607 static inline bool |
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608 _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info) |
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609 { |
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610 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info); |
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611 } |
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612 |
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613 static inline void |
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614 _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info) |
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615 { |
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616 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | |
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617 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); |
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618 } |
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619 |
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620 static inline void |
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621 _hb_glyph_info_clear_substituted (hb_glyph_info_t *info) |
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622 { |
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623 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); |
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624 } |
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625 |
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626 |
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627 /* Allocation / deallocation. */ |
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628 |
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629 static inline void |
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630 _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) |
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631 { |
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632 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props); |
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633 } |
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634 |
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635 static inline void |
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636 _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) |
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637 { |
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638 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props); |
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639 } |
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640 |
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641 static inline void |
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642 _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer) |
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643 { |
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644 HB_BUFFER_ASSERT_VAR (buffer, unicode_props); |
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645 } |
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646 |
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647 static inline void |
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648 _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) |
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649 { |
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650 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); |
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651 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); |
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652 HB_BUFFER_ALLOCATE_VAR (buffer, syllable); |
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653 } |
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654 |
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655 static inline void |
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656 _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) |
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657 { |
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658 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable); |
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659 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props); |
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660 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props); |
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661 } |
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662 |
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663 static inline void |
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664 _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer) |
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665 { |
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666 HB_BUFFER_ASSERT_VAR (buffer, glyph_props); |
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667 HB_BUFFER_ASSERT_VAR (buffer, lig_props); |
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668 HB_BUFFER_ASSERT_VAR (buffer, syllable); |
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669 } |
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670 |
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671 /* Make sure no one directly touches our props... */ |
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672 #undef unicode_props0 |
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673 #undef unicode_props1 |
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674 #undef lig_props |
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675 #undef glyph_props |
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676 |
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677 #endif /* HB_OT_LAYOUT_PRIVATE_HH */ |
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