The Tor Browser: gfx/harfbuzz/src/hb-ot-shape-private.hh@925c144e1f1f

     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  */

    27 #ifndef HB_OT_SHAPE_PRIVATE_HH

    28 #define HB_OT_SHAPE_PRIVATE_HH

    30 #include "hb-private.hh"

    32 #include "hb-ot-map-private.hh"

    33 #include "hb-ot-layout-private.hh"

    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;

    48   inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const

    49   {

    50     unsigned int table_index;

    51     switch (table_tag) {

    52       case HB_OT_TAG_GSUB: table_index = 0; break;

    53       case HB_OT_TAG_GPOS: table_index = 1; break;

    54       default: return;

    55     }

    56     map.collect_lookups (table_index, lookups);

    57   }

    58   inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }

    59   inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }

    61   void finish (void) { map.finish (); }

    62 };

    64 struct hb_ot_shape_planner_t

    65 {

    66   /* In the order that they are filled in. */

    67   hb_face_t *face;

    68   hb_segment_properties_t props;

    69   const struct hb_ot_complex_shaper_t *shaper;

    70   hb_ot_map_builder_t map;

    72   hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :

    73 			 face (master_plan->face_unsafe),

    74 			 props (master_plan->props),

    75 			 shaper (NULL),

    76 			 map (face, &props) {}

    77   ~hb_ot_shape_planner_t (void) { map.finish (); }

    79   inline void compile (hb_ot_shape_plan_t &plan)

    80   {

    81     plan.props = props;

    82     plan.shaper = shaper;

    83     map.compile (plan.map);

    85     plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));

    86     plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));

    87     plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));

    88     plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));

    90     plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?

    91 					HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));

    93     plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);

    94     plan.has_kern = !!plan.kern_mask;

    95   }

    97   private:

    98   NO_COPY (hb_ot_shape_planner_t);

    99 };

   102 #endif /* HB_OT_SHAPE_PRIVATE_HH */

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