216 lines
6.5 KiB
C++
216 lines
6.5 KiB
C++
/*
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* Copyright © 2010,2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_SHAPE_COMPLEX_PRIVATE_HH
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#define HB_OT_SHAPE_COMPLEX_PRIVATE_HH
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#include "hb-private.hh"
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#include "hb-ot-map-private.hh"
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HB_BEGIN_DECLS
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/* buffer var allocations, used during the entire shaping process */
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#define general_category() var1.u8[0] /* unicode general_category (hb_unicode_general_category_t) */
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#define combining_class() var1.u8[1] /* unicode combining_class (uint8_t) */
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/* buffer var allocations, used by complex shapers */
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#define complex_var_persistent_u8_0() var2.u8[0]
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#define complex_var_persistent_u8_1() var2.u8[1]
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#define complex_var_persistent_u16() var2.u16[0]
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#define complex_var_temporary_u8_0() var2.u8[2]
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#define complex_var_temporary_u8_1() var2.u8[3]
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#define complex_var_temporary_u16() var2.u16[1]
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#define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \
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HB_COMPLEX_SHAPER_IMPLEMENT (default) /* should be first */ \
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HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \
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HB_COMPLEX_SHAPER_IMPLEMENT (indic) \
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/* ^--- Add new shapers here */
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enum hb_ot_complex_shaper_t {
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) hb_ot_complex_shaper_##name,
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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};
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static inline hb_ot_complex_shaper_t
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hb_ot_shape_complex_categorize (const hb_segment_properties_t *props)
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{
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switch ((int) props->script)
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{
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default:
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return hb_ot_complex_shaper_default;
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case HB_SCRIPT_ARABIC:
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case HB_SCRIPT_MANDAIC:
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case HB_SCRIPT_MONGOLIAN:
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case HB_SCRIPT_NKO:
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case HB_SCRIPT_SYRIAC:
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return hb_ot_complex_shaper_arabic;
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/* TODO: These are all the scripts that the ucd/IndicSyllabicCategory.txt covers.
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* Quite possibly many of these need no shaping, and some other are encoded visually.
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* Needs to be refined.
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*/
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case HB_SCRIPT_BALINESE:
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case HB_SCRIPT_BATAK:
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case HB_SCRIPT_BENGALI:
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case HB_SCRIPT_BRAHMI:
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case HB_SCRIPT_BUGINESE:
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case HB_SCRIPT_BUHID:
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case HB_SCRIPT_CHAM:
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case HB_SCRIPT_DEVANAGARI:
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case HB_SCRIPT_GUJARATI:
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case HB_SCRIPT_GURMUKHI:
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case HB_SCRIPT_HANUNOO:
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case HB_SCRIPT_JAVANESE:
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case HB_SCRIPT_KAITHI:
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case HB_SCRIPT_KANNADA:
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case HB_SCRIPT_KAYAH_LI:
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case HB_SCRIPT_KHAROSHTHI:
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case HB_SCRIPT_KHMER:
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case HB_SCRIPT_LAO:
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case HB_SCRIPT_LEPCHA:
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case HB_SCRIPT_LIMBU:
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case HB_SCRIPT_MALAYALAM:
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case HB_SCRIPT_MEETEI_MAYEK:
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case HB_SCRIPT_MYANMAR:
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case HB_SCRIPT_NEW_TAI_LUE:
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case HB_SCRIPT_ORIYA:
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case HB_SCRIPT_PHAGS_PA:
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case HB_SCRIPT_REJANG:
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case HB_SCRIPT_SAURASHTRA:
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case HB_SCRIPT_SINHALA:
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case HB_SCRIPT_SUNDANESE:
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case HB_SCRIPT_SYLOTI_NAGRI:
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case HB_SCRIPT_TAGALOG:
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case HB_SCRIPT_TAGBANWA:
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case HB_SCRIPT_TAI_LE:
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case HB_SCRIPT_TAI_THAM:
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case HB_SCRIPT_TAI_VIET:
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case HB_SCRIPT_TAMIL:
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case HB_SCRIPT_TELUGU:
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case HB_SCRIPT_THAI:
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case HB_SCRIPT_TIBETAN:
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return hb_ot_complex_shaper_indic;
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/* ^--- Add new shapers here */
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}
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}
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/*
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* collect_features()
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*
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* Called during shape_plan().
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*
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* Shapers should use map to add their features and callbacks.
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*/
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typedef void hb_ot_shape_complex_collect_features_func_t (hb_ot_map_builder_t *map, const hb_segment_properties_t *props);
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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HB_INTERNAL hb_ot_shape_complex_collect_features_func_t _hb_ot_shape_complex_collect_features_##name;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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static inline void
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hb_ot_shape_complex_collect_features (hb_ot_complex_shaper_t shaper,
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hb_ot_map_builder_t *map,
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const hb_segment_properties_t *props)
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{
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switch (shaper) {
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default:
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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case hb_ot_complex_shaper_##name: _hb_ot_shape_complex_collect_features_##name (map, props); return;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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}
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}
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/*
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* prefer_decomposed()
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*
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* Called during shape_execute().
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*
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* Shapers should return TRUE if it prefers decomposed (NFD) input rather than precomposed (NFC).
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*/
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typedef bool hb_ot_shape_complex_prefer_decomposed_func_t (void);
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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HB_INTERNAL hb_ot_shape_complex_prefer_decomposed_func_t _hb_ot_shape_complex_prefer_decomposed_##name;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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static inline bool
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hb_ot_shape_complex_prefer_decomposed (hb_ot_complex_shaper_t shaper)
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{
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switch (shaper) {
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default:
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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case hb_ot_complex_shaper_##name: return _hb_ot_shape_complex_prefer_decomposed_##name ();
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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}
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}
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/* setup_masks()
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*
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* Called during shape_execute().
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*
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* Shapers should use map to get feature masks and set on buffer.
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*/
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typedef void hb_ot_shape_complex_setup_masks_func_t (hb_ot_map_t *map, hb_buffer_t *buffer);
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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HB_INTERNAL hb_ot_shape_complex_setup_masks_func_t _hb_ot_shape_complex_setup_masks_##name;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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static inline void
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hb_ot_shape_complex_setup_masks (hb_ot_complex_shaper_t shaper,
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hb_ot_map_t *map,
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hb_buffer_t *buffer)
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{
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switch (shaper) {
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default:
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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case hb_ot_complex_shaper_##name: _hb_ot_shape_complex_setup_masks_##name (map, buffer); return;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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}
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}
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HB_END_DECLS
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#endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */
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