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_PRIVATE_HH 28 #define HB_OT_SHAPE_PRIVATE_HH 29 30 #include "hb-private.hh" 31 32 #include "hb-ot-map-private.hh" 33 #include "hb-ot-layout-private.hh" 34 35 36 37 struct hb_ot_shape_plan_t 38 { 39 hb_segment_properties_t props; 40 const struct hb_ot_complex_shaper_t *shaper; 41 hb_ot_map_t map; 42 const void *data; 43 hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask; 44 hb_mask_t kern_mask; 45 unsigned int has_frac : 1; 46 unsigned int has_kern : 1; 47 unsigned int has_mark : 1; 48 collect_lookupshb_ot_shape_plan_t49 inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const 50 { 51 unsigned int table_index; 52 switch (table_tag) { 53 case HB_OT_TAG_GSUB: table_index = 0; break; 54 case HB_OT_TAG_GPOS: table_index = 1; break; 55 default: return; 56 } 57 map.collect_lookups (table_index, lookups); 58 } substitutehb_ot_shape_plan_t59 inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); } positionhb_ot_shape_plan_t60 inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); } 61 finishhb_ot_shape_plan_t62 void finish (void) { map.finish (); } 63 }; 64 65 struct hb_ot_shape_planner_t 66 { 67 /* In the order that they are filled in. */ 68 hb_face_t *face; 69 hb_segment_properties_t props; 70 const struct hb_ot_complex_shaper_t *shaper; 71 hb_ot_map_builder_t map; 72 hb_ot_shape_planner_thb_ot_shape_planner_t73 hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) : 74 face (master_plan->face_unsafe), 75 props (master_plan->props), 76 shaper (NULL), 77 map (face, &props) {} ~hb_ot_shape_planner_thb_ot_shape_planner_t78 ~hb_ot_shape_planner_t (void) { map.finish (); } 79 compilehb_ot_shape_planner_t80 inline void compile (hb_ot_shape_plan_t &plan) 81 { 82 plan.props = props; 83 plan.shaper = shaper; 84 map.compile (plan.map); 85 86 plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m')); 87 plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c')); 88 plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r')); 89 plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m')); 90 91 plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ? 92 HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n')); 93 94 plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask); 95 plan.has_kern = !!plan.kern_mask; 96 plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k')); 97 } 98 99 private: 100 NO_COPY (hb_ot_shape_planner_t); 101 }; 102 103 104 #endif /* HB_OT_SHAPE_PRIVATE_HH */ 105