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/*
* Copyright © 2010,2011,2012 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_COMPLEX_PRIVATE_HH
#define HB_OT_SHAPE_COMPLEX_PRIVATE_HH
#include "hb-private.hh"
#include "hb-ot-map-private.hh"
#include "hb-ot-shape-normalize-private.hh"
/* buffer var allocations, used during the entire shaping process */
#define unicode_props0() var1.u8[0]
#define unicode_props1() var1.u8[1]
/* buffer var allocations, used by complex shapers */
#define complex_var_persistent_u8_0() var2.u8[2]
#define complex_var_persistent_u8_1() var2.u8[3]
#define complex_var_temporary_u8() var2.u8[0]
/* Master OT shaper list */
#define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \
HB_COMPLEX_SHAPER_IMPLEMENT (default) /* should be first */ \
HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \
HB_COMPLEX_SHAPER_IMPLEMENT (indic) \
HB_COMPLEX_SHAPER_IMPLEMENT (thai) \
/* ^--- Add new shapers here */
struct hb_ot_complex_shaper_t
{
char name[8];
/* collect_features()
* Called during shape_plan().
* Shapers should use map to add their features and callbacks.
* May be NULL.
*/
void (*collect_features) (const hb_ot_complex_shaper_t *shaper,
hb_ot_map_builder_t *map,
const hb_segment_properties_t *props);
/* override_features()
* Called during shape_plan().
* Shapers should use map to override features and add callbacks after
* common features are added.
* May be NULL.
*/
void (*override_features) (const hb_ot_complex_shaper_t *shaper,
hb_ot_map_builder_t *map,
const hb_segment_properties_t *props);
/* normalization_preference()
* Called during shape_execute().
*/
hb_ot_shape_normalization_mode_t
(*normalization_preference) (const hb_ot_complex_shaper_t *shaper,
const hb_segment_properties_t *props);
/* setup_masks()
* Called during shape_execute().
* Shapers should use map to get feature masks and set on buffer.
*/
void (*setup_masks) (const hb_ot_complex_shaper_t *shaper,
const hb_ot_map_t *map,
hb_buffer_t *buffer,
hb_font_t *font);
};
#define HB_COMPLEX_SHAPER_IMPLEMENT(name) extern HB_INTERNAL const hb_ot_complex_shaper_t _hb_ot_complex_shaper_##name;
HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
#undef HB_COMPLEX_SHAPER_IMPLEMENT
static inline const hb_ot_complex_shaper_t *
hb_ot_shape_complex_categorize (const hb_segment_properties_t *props)
{
switch ((hb_tag_t) props->script)
{
default:
return &_hb_ot_complex_shaper_default;
/* Unicode-1.1 additions */
case HB_SCRIPT_ARABIC:
case HB_SCRIPT_MONGOLIAN:
case HB_SCRIPT_SYRIAC:
/* Unicode-5.0 additions */
case HB_SCRIPT_NKO:
/* Unicode-6.0 additions */
case HB_SCRIPT_MANDAIC:
return &_hb_ot_complex_shaper_arabic;
/* Unicode-1.1 additions */
case HB_SCRIPT_THAI:
case HB_SCRIPT_LAO:
return &_hb_ot_complex_shaper_thai;
/* ^--- Add new shapers here */
#if 0
/* Note:
*
* These disabled scripts are listed in ucd/IndicSyllabicCategory.txt, but according
* to Martin Hosken and Jonathan Kew do not require complex shaping.
*
* TODO We should automate figuring out which scripts do not need complex shaping
*
* TODO We currently keep data for these scripts in our indic table. Need to fix the
* generator to not do that.
*/
/* Simple? */
/* Unicode-3.2 additions */
case HB_SCRIPT_BUHID:
case HB_SCRIPT_HANUNOO:
/* Unicode-5.1 additions */
case HB_SCRIPT_SAURASHTRA:
/* Unicode-5.2 additions */
case HB_SCRIPT_MEETEI_MAYEK:
/* Unicode-6.0 additions */
case HB_SCRIPT_BATAK:
case HB_SCRIPT_BRAHMI:
/* Simple */
/* Unicode-1.1 additions */
/* These have their own shaper now. */
case HB_SCRIPT_LAO:
case HB_SCRIPT_THAI:
/* Unicode-2.0 additions */
case HB_SCRIPT_TIBETAN:
/* Unicode-3.2 additions */
case HB_SCRIPT_TAGALOG:
case HB_SCRIPT_TAGBANWA:
/* Unicode-4.0 additions */
case HB_SCRIPT_LIMBU:
case HB_SCRIPT_TAI_LE:
/* Unicode-4.1 additions */
case HB_SCRIPT_SYLOTI_NAGRI:
/* Unicode-5.0 additions */
case HB_SCRIPT_PHAGS_PA:
/* Unicode-5.1 additions */
case HB_SCRIPT_KAYAH_LI:
/* Unicode-5.2 additions */
case HB_SCRIPT_TAI_VIET:
/* May need Indic treatment in the future? */
/* Unicode-3.0 additions */
case HB_SCRIPT_MYANMAR:
#endif
/* Unicode-1.1 additions */
case HB_SCRIPT_BENGALI:
case HB_SCRIPT_DEVANAGARI:
case HB_SCRIPT_GUJARATI:
case HB_SCRIPT_GURMUKHI:
case HB_SCRIPT_KANNADA:
case HB_SCRIPT_MALAYALAM:
case HB_SCRIPT_ORIYA:
case HB_SCRIPT_TAMIL:
case HB_SCRIPT_TELUGU:
/* Unicode-3.0 additions */
case HB_SCRIPT_KHMER:
case HB_SCRIPT_SINHALA:
/* Unicode-4.1 additions */
case HB_SCRIPT_BUGINESE:
case HB_SCRIPT_KHAROSHTHI:
case HB_SCRIPT_NEW_TAI_LUE:
/* Unicode-5.0 additions */
case HB_SCRIPT_BALINESE:
/* Unicode-5.1 additions */
case HB_SCRIPT_CHAM:
case HB_SCRIPT_LEPCHA:
case HB_SCRIPT_REJANG:
case HB_SCRIPT_SUNDANESE:
/* Unicode-5.2 additions */
case HB_SCRIPT_JAVANESE:
case HB_SCRIPT_KAITHI:
case HB_SCRIPT_TAI_THAM:
/* Unicode-6.1 additions */
case HB_SCRIPT_CHAKMA:
case HB_SCRIPT_SHARADA:
case HB_SCRIPT_TAKRI:
return &_hb_ot_complex_shaper_indic;
}
}
#endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */
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