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 int 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 == 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 { 63 hb_segment_properties_t props; 64 const struct hb_ot_complex_shaper_t *shaper; 65 hb_ot_map_t map; 66 hb_aat_map_t aat_map; 67 const void *data; 68 #ifndef HB_NO_OT_SHAPE_FRACTIONS 69 hb_mask_t frac_mask, numr_mask, dnom_mask; 70 #else 71 static constexpr hb_mask_t frac_mask = 0; 72 static constexpr hb_mask_t numr_mask = 0; 73 static constexpr hb_mask_t dnom_mask = 0; 74 #endif 75 hb_mask_t rtlm_mask; 76 #ifndef HB_NO_OT_KERN 77 hb_mask_t kern_mask; 78 #else 79 static constexpr hb_mask_t kern_mask = 0; 80 #endif 81 #ifndef HB_NO_AAT_SHAPE 82 hb_mask_t trak_mask; 83 #else 84 static constexpr hb_mask_t trak_mask = 0; 85 #endif 86 87 #ifndef HB_NO_OT_KERN 88 bool requested_kerning : 1; 89 #else 90 static constexpr bool requested_kerning = false; 91 #endif 92 #ifndef HB_NO_AAT_SHAPE 93 bool requested_tracking : 1; 94 #else 95 static constexpr bool requested_tracking = false; 96 #endif 97 #ifndef HB_NO_OT_SHAPE_FRACTIONS 98 bool has_frac : 1; 99 #else 100 static constexpr bool has_frac = false; 101 #endif 102 bool has_gpos_mark : 1; 103 bool zero_marks : 1; 104 bool fallback_glyph_classes : 1; 105 bool fallback_mark_positioning : 1; 106 bool adjust_mark_positioning_when_zeroing : 1; 107 108 bool apply_gpos : 1; 109 #ifndef HB_NO_OT_KERN 110 bool apply_kern : 1; 111 #else 112 static constexpr bool apply_kern = false; 113 #endif 114 #ifndef HB_NO_AAT_SHAPE 115 bool apply_kerx : 1; 116 bool apply_morx : 1; 117 bool apply_trak : 1; 118 #else 119 static constexpr bool apply_kerx = false; 120 static constexpr bool apply_morx = false; 121 static constexpr bool apply_trak = false; 122 #endif 123 collect_lookupshb_ot_shape_plan_t124 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 125 { 126 unsigned int table_index; 127 switch (table_tag) { 128 case HB_OT_TAG_GSUB: table_index = 0; break; 129 case HB_OT_TAG_GPOS: table_index = 1; break; 130 default: return; 131 } 132 map.collect_lookups (table_index, lookups); 133 } 134 135 HB_INTERNAL bool init0 (hb_face_t *face, 136 const hb_shape_plan_key_t *key); 137 HB_INTERNAL void fini (); 138 139 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const; 140 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const; 141 }; 142 143 struct hb_shape_plan_t; 144 145 struct hb_ot_shape_planner_t 146 { 147 /* In the order that they are filled in. */ 148 hb_face_t *face; 149 hb_segment_properties_t props; 150 hb_ot_map_builder_t map; 151 hb_aat_map_builder_t aat_map; 152 #ifndef HB_NO_AAT_SHAPE 153 bool apply_morx : 1; 154 #else 155 static constexpr bool apply_morx = false; 156 #endif 157 bool script_zero_marks : 1; 158 bool script_fallback_mark_positioning : 1; 159 const struct hb_ot_complex_shaper_t *shaper; 160 161 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face, 162 const hb_segment_properties_t *props); 163 164 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan, 165 const hb_ot_shape_plan_key_t &key); 166 }; 167 168 169 #endif /* HB_OT_SHAPE_HH */ 170