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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_HH
#define HB_OT_SHAPE_HH
#include "hb.hh"
#include "hb-ot-map.hh"
#include "hb-aat-map.hh"
struct hb_ot_shape_plan_key_t
{
unsigned int variations_index[2];
void init (hb_face_t *face,
const int *coords,
unsigned num_coords)
{
for (unsigned int table_index = 0; table_index < 2; table_index++)
hb_ot_layout_table_find_feature_variations (face,
table_tags[table_index],
coords,
num_coords,
&variations_index[table_index]);
}
bool equal (const hb_ot_shape_plan_key_t *other)
{
return 0 == hb_memcmp (this, other, sizeof (*this));
}
};
struct hb_shape_plan_key_t;
struct hb_ot_shape_plan_t
{
~hb_ot_shape_plan_t () { fini (); }
hb_segment_properties_t props;
const struct hb_ot_shaper_t *shaper;
hb_ot_map_t map;
const void *data;
#ifndef HB_NO_OT_SHAPE_FRACTIONS
hb_mask_t frac_mask, numr_mask, dnom_mask;
#else
static constexpr hb_mask_t frac_mask = 0;
static constexpr hb_mask_t numr_mask = 0;
static constexpr hb_mask_t dnom_mask = 0;
#endif
hb_mask_t rtlm_mask;
#ifndef HB_NO_OT_KERN
hb_mask_t kern_mask;
#else
static constexpr hb_mask_t kern_mask = 0;
#endif
#ifndef HB_NO_AAT_SHAPE
hb_mask_t trak_mask;
#else
static constexpr hb_mask_t trak_mask = 0;
#endif
#ifndef HB_NO_OT_KERN
bool requested_kerning : 1;
#else
static constexpr bool requested_kerning = false;
#endif
#ifndef HB_NO_AAT_SHAPE
bool requested_tracking : 1;
#else
static constexpr bool requested_tracking = false;
#endif
#ifndef HB_NO_OT_SHAPE_FRACTIONS
bool has_frac : 1;
#else
static constexpr bool has_frac = false;
#endif
bool has_vert : 1;
bool has_gpos_mark : 1;
bool zero_marks : 1;
bool fallback_glyph_classes : 1;
bool fallback_mark_positioning : 1;
bool adjust_mark_positioning_when_zeroing : 1;
bool apply_gpos : 1;
#ifndef HB_NO_OT_KERN
bool apply_kern : 1;
#else
static constexpr bool apply_kern = false;
#endif
bool apply_fallback_kern : 1;
#ifndef HB_NO_AAT_SHAPE
bool apply_kerx : 1;
bool apply_morx : 1;
bool apply_trak : 1;
#else
static constexpr bool apply_kerx = false;
static constexpr bool apply_morx = false;
static constexpr bool apply_trak = false;
#endif
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);
}
HB_INTERNAL bool init0 (hb_face_t *face,
const hb_shape_plan_key_t *key);
HB_INTERNAL void fini ();
HB_INTERNAL void substitute (hb_font_t *font, hb_buffer_t *buffer) const;
HB_INTERNAL void position (hb_font_t *font, hb_buffer_t *buffer) const;
};
struct hb_shape_plan_t;
struct hb_ot_shape_planner_t
{
/* In the order that they are filled in. */
hb_face_t *face;
hb_segment_properties_t props;
hb_ot_map_builder_t map;
#ifndef HB_NO_AAT_SHAPE
bool apply_morx : 1;
#else
static constexpr bool apply_morx = false;
#endif
bool script_zero_marks : 1;
bool script_fallback_mark_positioning : 1;
const struct hb_ot_shaper_t *shaper;
HB_INTERNAL hb_ot_shape_planner_t (hb_face_t *face,
const hb_segment_properties_t &props);
HB_INTERNAL void compile (hb_ot_shape_plan_t &plan,
const hb_ot_shape_plan_key_t &key);
};
#endif /* HB_OT_SHAPE_HH */
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