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/*
* Copyright © 2010 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_SHAPE_PRIVATE_HH
#define HB_OT_SHAPE_PRIVATE_HH
#include "hb-private.hh"
#include "hb-ot-map-private.hh"
#include "hb-ot-layout-private.hh"
struct hb_ot_shape_plan_t
{
hb_segment_properties_t props;
const struct hb_ot_complex_shaper_t *shaper;
hb_ot_map_t map;
const void *data;
hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask;
hb_mask_t kern_mask;
unsigned int has_frac : 1;
unsigned int has_kern : 1;
unsigned int has_mark : 1;
inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
{
unsigned int table_index;
switch (table_tag) {
case HB_OT_TAG_GSUB: table_index = 0; break;
case HB_OT_TAG_GPOS: table_index = 1; break;
default: return;
}
map.collect_lookups (table_index, lookups);
}
inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
void finish (void) { map.finish (); }
};
struct hb_ot_shape_planner_t
{
/* In the order that they are filled in. */
hb_face_t *face;
hb_segment_properties_t props;
const struct hb_ot_complex_shaper_t *shaper;
hb_ot_map_builder_t map;
hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
face (master_plan->face_unsafe),
props (master_plan->props),
shaper (NULL),
map (face, &props) {}
~hb_ot_shape_planner_t (void) { map.finish (); }
inline void compile (hb_ot_shape_plan_t &plan)
{
plan.props = props;
plan.shaper = shaper;
map.compile (plan.map);
plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m'));
plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m'));
plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ?
HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n'));
plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask);
plan.has_kern = !!plan.kern_mask;
plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k'));
}
private:
NO_COPY (hb_ot_shape_planner_t);
};
#endif /* HB_OT_SHAPE_PRIVATE_HH */
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