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 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 52 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 hb_mask_t frac_mask, numr_mask, dnom_mask; 69 hb_mask_t rtlm_mask; 70 hb_mask_t kern_mask; 71 hb_mask_t trak_mask; 72 73 bool requested_kerning : 1; 74 bool requested_tracking : 1; 75 bool has_frac : 1; 76 bool has_gpos_mark : 1; 77 bool zero_marks : 1; 78 bool fallback_glyph_classes : 1; 79 bool fallback_mark_positioning : 1; 80 bool adjust_mark_positioning_when_zeroing : 1; 81 82 bool apply_gpos : 1; 83 bool apply_kerx : 1; 84 bool apply_kern : 1; 85 bool apply_morx : 1; 86 bool apply_trak : 1; 87 88 void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 89 { 90 unsigned int table_index; 91 switch (table_tag) { 92 case HB_OT_TAG_GSUB: table_index = 0; break; 93 case HB_OT_TAG_GPOS: table_index = 1; break; 94 default: return; 95 } 96 map.collect_lookups (table_index, lookups); 97 } 98 99 HB_INTERNAL bool init0 (hb_face_t *face, 100 const hb_shape_plan_key_t *key); 101 HB_INTERNAL void fini (); 102 103 HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const; 104 HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const; 105 }; 106 107 struct hb_shape_plan_t; 108 109 struct hb_ot_shape_planner_t 110 { 111 /* In the order that they are filled in. */ 112 hb_face_t *face; 113 hb_segment_properties_t props; 114 hb_ot_map_builder_t map; 115 hb_aat_map_builder_t aat_map; 116 bool apply_morx : 1; 117 bool script_zero_marks : 1; 118 bool script_fallback_mark_positioning : 1; 119 const struct hb_ot_complex_shaper_t *shaper; 120 121 HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face, 122 const hb_segment_properties_t *props); 123 124 HB_INTERNAL void compile (hb_ot_shape_plan_t &plan, 125 const hb_ot_shape_plan_key_t &key); 126 }; 127 128 129 #endif /* HB_OT_SHAPE_HH */ 130
