Line data    Source code

       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           0 : 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             : 
      49           0 :   inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
      50             :   {
      51             :     unsigned int table_index;
      52           0 :     switch (table_tag) {
      53           0 :       case HB_OT_TAG_GSUB: table_index = 0; break;
      54           0 :       case HB_OT_TAG_GPOS: table_index = 1; break;
      55           0 :       default: return;
      56             :     }
      57           0 :     map.collect_lookups (table_index, lookups);
      58             :   }
      59          34 :   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
      60          34 :   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
      61             : 
      62           0 :   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             : 
      73           2 :   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
      74           2 :                          face (master_plan->face_unsafe),
      75             :                          props (master_plan->props),
      76             :                          shaper (NULL),
      77           2 :                          map (face, &props) {}
      78           2 :   ~hb_ot_shape_planner_t (void) { map.finish (); }
      79             : 
      80           2 :   inline void compile (hb_ot_shape_plan_t &plan,
      81             :                        const int          *coords,
      82             :                        unsigned int        num_coords)
      83             :   {
      84           2 :     plan.props = props;
      85           2 :     plan.shaper = shaper;
      86           2 :     map.compile (plan.map, coords, num_coords);
      87             : 
      88           2 :     plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
      89           2 :     plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
      90           2 :     plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
      91           2 :     plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
      92             : 
      93           2 :     plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
      94             :                                         HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
      95             : 
      96           2 :     plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
      97           2 :     plan.has_kern = !!plan.kern_mask;
      98           2 :     plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k'));
      99           2 :   }
     100             : 
     101             :   private:
     102             :   NO_COPY (hb_ot_shape_planner_t);
     103             : };
     104             : 
     105             : 
     106             : #endif /* HB_OT_SHAPE_PRIVATE_HH */