1 /*
   2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.  Oracle designates this
   7  * particular file as subject to the "Classpath" exception as provided
   8  * by Oracle in the LICENSE file that accompanied this code.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 // This file is available under and governed by the GNU General Public
  26 // License version 2 only, as published by the Free Software Foundation.
  27 // However, the following notice accompanied the original version of this
  28 // file:
  29 //
  30 /*
  31  * Copyright © 2010  Google, Inc.
  32  *
  33  *  This is part of HarfBuzz, a text shaping library.
  34  *
  35  * Permission is hereby granted, without written agreement and without
  36  * license or royalty fees, to use, copy, modify, and distribute this
  37  * software and its documentation for any purpose, provided that the
  38  * above copyright notice and the following two paragraphs appear in
  39  * all copies of this software.
  40  *
  41  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  42  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  43  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  44  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  45  * DAMAGE.
  46  *
  47  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  48  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  49  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  50  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  51  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  52  *
  53  * Google Author(s): Behdad Esfahbod
  54  */
  55 
  56 #ifndef HB_OT_SHAPE_PRIVATE_HH
  57 #define HB_OT_SHAPE_PRIVATE_HH
  58 
  59 #include "hb-private.hh"
  60 
  61 #include "hb-ot-map-private.hh"
  62 #include "hb-ot-layout-private.hh"
  63 
  64 
  65 
  66 struct hb_ot_shape_plan_t
  67 {
  68   hb_segment_properties_t props;
  69   const struct hb_ot_complex_shaper_t *shaper;
  70   hb_ot_map_t map;
  71   const void *data;
  72   hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask;
  73   hb_mask_t kern_mask;
  74   unsigned int has_frac : 1;
  75   unsigned int has_kern : 1;
  76   unsigned int has_mark : 1;
  77 
  78   inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
  79   {
  80     unsigned int table_index;
  81     switch (table_tag) {
  82       case HB_OT_TAG_GSUB: table_index = 0; break;
  83       case HB_OT_TAG_GPOS: table_index = 1; break;
  84       default: return;
  85     }
  86     map.collect_lookups (table_index, lookups);
  87   }
  88   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
  89   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
  90 
  91   void finish (void) { map.finish (); }
  92 };
  93 
  94 struct hb_ot_shape_planner_t
  95 {
  96   /* In the order that they are filled in. */
  97   hb_face_t *face;
  98   hb_segment_properties_t props;
  99   const struct hb_ot_complex_shaper_t *shaper;
 100   hb_ot_map_builder_t map;
 101 
 102   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
 103                          face (master_plan->face_unsafe),
 104                          props (master_plan->props),
 105                          shaper (NULL),
 106                          map (face, &props) {}
 107   ~hb_ot_shape_planner_t (void) { map.finish (); }
 108 
 109   inline void compile (hb_ot_shape_plan_t &plan)
 110   {
 111     plan.props = props;
 112     plan.shaper = shaper;
 113     map.compile (plan.map);
 114 
 115     plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
 116     plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
 117     plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
 118     plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
 119 
 120     plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
 121                                         HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
 122 
 123     plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
 124     plan.has_kern = !!plan.kern_mask;
 125     plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k'));
 126   }
 127 
 128   private:
 129   NO_COPY (hb_ot_shape_planner_t);
 130 };
 131 
 132 
 133 #endif /* HB_OT_SHAPE_PRIVATE_HH */