1 /* 2 * Copyright © 2010 Google, Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #ifndef HB_OT_SHAPE_HH 28 #define HB_OT_SHAPE_HH 29 30 #include "hb.hh" 31 32 #include "hb-ot-map.hh" 33 #include "hb-aat-map.hh" 34 35 36 struct hb_ot_shape_plan_key_t 37 { 38 unsigned int variations_index[2]; 39 inithb_ot_shape_plan_key_t40 void init (hb_face_t *face, 41 const int *coords, 42 unsigned num_coords) 43 { 44 for (unsigned int table_index = 0; table_index < 2; table_index++) 45 hb_ot_layout_table_find_feature_variations (face, 46 table_tags[table_index], 47 coords, 48 num_coords, 49 &variations_index[table_index]); 50 } 51 equalhb_ot_shape_plan_key_t52 bool equal (const hb_ot_shape_plan_key_t *other) 53 { 54 return 0 == hb_memcmp (this, other, sizeof (*this)); 55 } 56 }; 57 58 59 struct hb_shape_plan_key_t; 60 61 struct hb_ot_shape_plan_t 62 { ~hb_ot_shape_plan_thb_ot_shape_plan_t63 ~hb_ot_shape_plan_t () { fini (); } 64 65 hb_segment_properties_t props; 66 const struct hb_ot_shaper_t *shaper; 67 hb_ot_map_t map; 68 const void *data; 69 #ifndef HB_NO_OT_SHAPE_FRACTIONS 70 hb_mask_t frac_mask, numr_mask, dnom_mask; 71 #else 72 static constexpr hb_mask_t frac_mask = 0; 73 static constexpr hb_mask_t numr_mask = 0; 74 static constexpr hb_mask_t dnom_mask = 0; 75 #endif 76 hb_mask_t rtlm_mask; 77 #ifndef HB_NO_OT_KERN 78 hb_mask_t kern_mask; 79 #else 80 static constexpr hb_mask_t kern_mask = 0; 81 #endif 82 #ifndef HB_NO_AAT_SHAPE 83 hb_mask_t trak_mask; 84 #else 85 static constexpr hb_mask_t trak_mask = 0; 86 #endif 87 88 #ifndef HB_NO_OT_KERN 89 bool requested_kerning : 1; 90 #else 91 static constexpr bool requested_kerning = false; 92 #endif 93 #ifndef HB_NO_AAT_SHAPE 94 bool requested_tracking : 1; 95 #else 96 static constexpr bool requested_tracking = false; 97 #endif 98 #ifndef HB_NO_OT_SHAPE_FRACTIONS 99 bool has_frac : 1; 100 #else 101 static constexpr bool has_frac = false; 102 #endif 103 bool has_vert : 1; 104 bool has_gpos_mark : 1; 105 bool zero_marks : 1; 106 bool fallback_glyph_classes : 1; 107 bool fallback_mark_positioning : 1; 108 bool adjust_mark_positioning_when_zeroing : 1; 109 110 bool apply_gpos : 1; 111 #ifndef HB_NO_OT_KERN 112 bool apply_kern : 1; 113 #else 114 static constexpr bool apply_kern = false; 115 #endif 116 bool apply_fallback_kern : 1; 117 #ifndef HB_NO_AAT_SHAPE 118 bool apply_kerx : 1; 119 bool apply_morx : 1; 120 bool apply_trak : 1; 121 #else 122 static constexpr bool apply_kerx = false; 123 static constexpr bool apply_morx = false; 124 static constexpr bool apply_trak = false; 125 #endif 126 collect_lookupshb_ot_shape_plan_t127 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 128 { 129 unsigned int table_index; 130 switch (table_tag) { 131 case HB_OT_TAG_GSUB: table_index = 0; break; 132 case HB_OT_TAG_GPOS: table_index = 1; break; 133 default: return; 134 } 135 map.collect_lookups (table_index, lookups); 136 } 137 138 HB_INTERNAL bool init0 (hb_face_t *face, 139 const hb_shape_plan_key_t *key); 140 HB_INTERNAL void fini (); 141 142 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const; 143 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const; 144 }; 145 146 struct hb_shape_plan_t; 147 148 struct hb_ot_shape_planner_t 149 { 150 /* In the order that they are filled in. */ 151 hb_face_t *face; 152 hb_segment_properties_t props; 153 hb_ot_map_builder_t map; 154 #ifndef HB_NO_AAT_SHAPE 155 bool apply_morx : 1; 156 #else 157 static constexpr bool apply_morx = false; 158 #endif 159 bool script_zero_marks : 1; 160 bool script_fallback_mark_positioning : 1; 161 const struct hb_ot_shaper_t *shaper; 162 163 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face, 164 const hb_segment_properties_t &props); 165 166 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan, 167 const hb_ot_shape_plan_key_t &key); 168 }; 169 170 171 #endif /* HB_OT_SHAPE_HH */ 172