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 hb_aat_map_t aat_map; 69 const void *data; 70 #ifndef HB_NO_OT_SHAPE_FRACTIONS 71 hb_mask_t frac_mask, numr_mask, dnom_mask; 72 #else 73 static constexpr hb_mask_t frac_mask = 0; 74 static constexpr hb_mask_t numr_mask = 0; 75 static constexpr hb_mask_t dnom_mask = 0; 76 #endif 77 hb_mask_t rtlm_mask; 78 #ifndef HB_NO_OT_KERN 79 hb_mask_t kern_mask; 80 #else 81 static constexpr hb_mask_t kern_mask = 0; 82 #endif 83 #ifndef HB_NO_AAT_SHAPE 84 hb_mask_t trak_mask; 85 #else 86 static constexpr hb_mask_t trak_mask = 0; 87 #endif 88 89 #ifndef HB_NO_OT_KERN 90 bool requested_kerning : 1; 91 #else 92 static constexpr bool requested_kerning = false; 93 #endif 94 #ifndef HB_NO_AAT_SHAPE 95 bool requested_tracking : 1; 96 #else 97 static constexpr bool requested_tracking = false; 98 #endif 99 #ifndef HB_NO_OT_SHAPE_FRACTIONS 100 bool has_frac : 1; 101 #else 102 static constexpr bool has_frac = false; 103 #endif 104 bool has_vert : 1; 105 bool has_gpos_mark : 1; 106 bool zero_marks : 1; 107 bool fallback_glyph_classes : 1; 108 bool fallback_mark_positioning : 1; 109 bool adjust_mark_positioning_when_zeroing : 1; 110 111 bool apply_gpos : 1; 112 #ifndef HB_NO_OT_KERN 113 bool apply_kern : 1; 114 #else 115 static constexpr bool apply_kern = false; 116 #endif 117 bool apply_fallback_kern : 1; 118 #ifndef HB_NO_AAT_SHAPE 119 bool apply_kerx : 1; 120 bool apply_morx : 1; 121 bool apply_trak : 1; 122 #else 123 static constexpr bool apply_kerx = false; 124 static constexpr bool apply_morx = false; 125 static constexpr bool apply_trak = false; 126 #endif 127 collect_lookupshb_ot_shape_plan_t128 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 129 { 130 unsigned int table_index; 131 switch (table_tag) { 132 case HB_OT_TAG_GSUB: table_index = 0; break; 133 case HB_OT_TAG_GPOS: table_index = 1; break; 134 default: return; 135 } 136 map.collect_lookups (table_index, lookups); 137 } 138 139 HB_INTERNAL bool init0 (hb_face_t *face, 140 const hb_shape_plan_key_t *key); 141 HB_INTERNAL void fini (); 142 143 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const; 144 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const; 145 }; 146 147 struct hb_shape_plan_t; 148 149 struct hb_ot_shape_planner_t 150 { 151 /* In the order that they are filled in. */ 152 hb_face_t *face; 153 hb_segment_properties_t props; 154 hb_ot_map_builder_t map; 155 hb_aat_map_builder_t aat_map; 156 #ifndef HB_NO_AAT_SHAPE 157 bool apply_morx : 1; 158 #else 159 static constexpr bool apply_morx = false; 160 #endif 161 bool script_zero_marks : 1; 162 bool script_fallback_mark_positioning : 1; 163 const struct hb_ot_shaper_t *shaper; 164 165 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face, 166 const hb_segment_properties_t &props); 167 168 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan, 169 const hb_ot_shape_plan_key_t &key); 170 }; 171 172 173 #endif /* HB_OT_SHAPE_HH */ 174