hb-ot-shape.hh (4488B)
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 40 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 52 bool equal (const hb_ot_shape_plan_key_t *other) 53 { 54 return variations_index[0] == other->variations_index[0] && 55 variations_index[1] == other->variations_index[1]; 56 } 57 }; 58 59 60 struct hb_shape_plan_key_t; 61 62 struct hb_ot_shape_plan_t 63 { 64 ~hb_ot_shape_plan_t () { fini (); } 65 66 hb_segment_properties_t props; 67 const struct hb_ot_shaper_t *shaper; 68 hb_ot_map_t map; 69 hb_aat_map_t aat_map; 70 const void *data; 71 #ifndef HB_NO_OT_SHAPE_FRACTIONS 72 hb_mask_t frac_mask, numr_mask, dnom_mask; 73 #else 74 static constexpr hb_mask_t frac_mask = 0; 75 static constexpr hb_mask_t numr_mask = 0; 76 static constexpr hb_mask_t dnom_mask = 0; 77 #endif 78 hb_mask_t rtlm_mask; 79 #ifndef HB_NO_OT_KERN 80 hb_mask_t kern_mask; 81 #else 82 static constexpr hb_mask_t kern_mask = 0; 83 #endif 84 85 #ifndef HB_NO_OT_KERN 86 bool requested_kerning : 1; 87 #else 88 static constexpr bool requested_kerning = false; 89 #endif 90 #ifndef HB_NO_OT_SHAPE_FRACTIONS 91 bool has_frac : 1; 92 #else 93 static constexpr bool has_frac = false; 94 #endif 95 bool has_vert : 1; 96 bool has_gpos_mark : 1; 97 bool zero_marks : 1; 98 bool fallback_glyph_classes : 1; 99 bool fallback_mark_positioning : 1; 100 bool adjust_mark_positioning_when_zeroing : 1; 101 102 bool apply_gpos : 1; 103 #ifndef HB_NO_OT_KERN 104 bool apply_kern : 1; 105 #else 106 static constexpr bool apply_kern = false; 107 #endif 108 bool apply_fallback_kern : 1; 109 #ifndef HB_NO_AAT_SHAPE 110 bool apply_kerx : 1; 111 bool apply_morx : 1; 112 bool apply_trak : 1; 113 #else 114 static constexpr bool apply_kerx = false; 115 static constexpr bool apply_morx = false; 116 static constexpr bool apply_trak = false; 117 #endif 118 119 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 120 { 121 unsigned int table_index; 122 switch (table_tag) { 123 case HB_OT_TAG_GSUB: table_index = 0; break; 124 case HB_OT_TAG_GPOS: table_index = 1; break; 125 default: return; 126 } 127 map.collect_lookups (table_index, lookups); 128 } 129 130 HB_INTERNAL bool init0 (hb_face_t *face, 131 const hb_shape_plan_key_t *key); 132 HB_INTERNAL void fini (); 133 134 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const; 135 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const; 136 }; 137 138 struct hb_shape_plan_t; 139 140 struct hb_ot_shape_planner_t 141 { 142 /* In the order that they are filled in. */ 143 hb_face_t *face; 144 hb_segment_properties_t props; 145 hb_ot_map_builder_t map; 146 #ifndef HB_NO_AAT_SHAPE 147 hb_aat_map_builder_t aat_map; 148 bool apply_morx : 1; 149 #else 150 static constexpr bool apply_morx = false; 151 #endif 152 bool script_zero_marks : 1; 153 bool script_fallback_position : 1; 154 const struct hb_ot_shaper_t *shaper; 155 156 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face, 157 const hb_segment_properties_t &props); 158 159 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan, 160 const hb_ot_shape_plan_key_t &key); 161 }; 162 163 164 #endif /* HB_OT_SHAPE_HH */