403 lines
12 KiB
C++
403 lines
12 KiB
C++
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/*
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* Copyright © 2010,2011,2012 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_HH
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#define HB_OT_SHAPE_COMPLEX_HH
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#include "hb.hh"
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#include "hb-ot-layout.hh"
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#include "hb-ot-shape.hh"
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#include "hb-ot-shape-normalize.hh"
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/* buffer var allocations, used by complex shapers */
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#define complex_var_u8_0() var2.u8[2]
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#define complex_var_u8_1() var2.u8[3]
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#define HB_OT_SHAPE_COMPLEX_MAX_COMBINING_MARKS 32
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enum hb_ot_shape_zero_width_marks_type_t {
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HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
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HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
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HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE
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};
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/* Master OT shaper list */
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#define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \
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HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \
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HB_COMPLEX_SHAPER_IMPLEMENT (default) \
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HB_COMPLEX_SHAPER_IMPLEMENT (dumber) \
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HB_COMPLEX_SHAPER_IMPLEMENT (hangul) \
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HB_COMPLEX_SHAPER_IMPLEMENT (hebrew) \
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HB_COMPLEX_SHAPER_IMPLEMENT (indic) \
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HB_COMPLEX_SHAPER_IMPLEMENT (khmer) \
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HB_COMPLEX_SHAPER_IMPLEMENT (myanmar) \
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HB_COMPLEX_SHAPER_IMPLEMENT (myanmar_zawgyi) \
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HB_COMPLEX_SHAPER_IMPLEMENT (thai) \
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HB_COMPLEX_SHAPER_IMPLEMENT (use) \
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/* ^--- Add new shapers here; keep sorted. */
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struct hb_ot_complex_shaper_t
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{
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/* collect_features()
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* Called during shape_plan().
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* Shapers should use plan->map to add their features and callbacks.
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* May be NULL.
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*/
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void (*collect_features) (hb_ot_shape_planner_t *plan);
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/* override_features()
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* Called during shape_plan().
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* Shapers should use plan->map to override features and add callbacks after
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* common features are added.
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* May be NULL.
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*/
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void (*override_features) (hb_ot_shape_planner_t *plan);
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/* data_create()
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* Called at the end of shape_plan().
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* Whatever shapers return will be accessible through plan->data later.
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* If nullptr is returned, means a plan failure.
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*/
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void *(*data_create) (const hb_ot_shape_plan_t *plan);
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/* data_destroy()
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* Called when the shape_plan is being destroyed.
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* plan->data is passed here for destruction.
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* If nullptr is returned, means a plan failure.
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* May be NULL.
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*/
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void (*data_destroy) (void *data);
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/* preprocess_text()
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* Called during shape().
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* Shapers can use to modify text before shaping starts.
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* May be NULL.
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*/
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void (*preprocess_text) (const hb_ot_shape_plan_t *plan,
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hb_buffer_t *buffer,
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hb_font_t *font);
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/* postprocess_glyphs()
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* Called during shape().
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* Shapers can use to modify glyphs after shaping ends.
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* May be NULL.
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*/
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void (*postprocess_glyphs) (const hb_ot_shape_plan_t *plan,
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hb_buffer_t *buffer,
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hb_font_t *font);
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hb_ot_shape_normalization_mode_t normalization_preference;
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/* decompose()
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* Called during shape()'s normalization.
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* May be NULL.
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*/
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bool (*decompose) (const hb_ot_shape_normalize_context_t *c,
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hb_codepoint_t ab,
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hb_codepoint_t *a,
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hb_codepoint_t *b);
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/* compose()
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* Called during shape()'s normalization.
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* May be NULL.
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*/
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bool (*compose) (const hb_ot_shape_normalize_context_t *c,
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hb_codepoint_t a,
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hb_codepoint_t b,
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hb_codepoint_t *ab);
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/* setup_masks()
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* Called during shape().
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* Shapers should use map to get feature masks and set on buffer.
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* Shapers may NOT modify characters.
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* May be NULL.
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*/
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void (*setup_masks) (const hb_ot_shape_plan_t *plan,
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hb_buffer_t *buffer,
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hb_font_t *font);
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/* gpos_tag()
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* If not HB_TAG_NONE, then must match found GPOS script tag for
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* GPOS to be applied. Otherwise, fallback positioning will be used.
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*/
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hb_tag_t gpos_tag;
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/* reorder_marks()
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* Called during shape().
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* Shapers can use to modify ordering of combining marks.
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* May be NULL.
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*/
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void (*reorder_marks) (const hb_ot_shape_plan_t *plan,
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hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end);
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hb_ot_shape_zero_width_marks_type_t zero_width_marks;
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bool fallback_position;
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};
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) extern HB_INTERNAL const hb_ot_complex_shaper_t _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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static inline const hb_ot_complex_shaper_t *
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hb_ot_shape_complex_categorize (const hb_ot_shape_planner_t *planner)
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{
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switch ((hb_tag_t) planner->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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/* Unicode-1.1 additions */
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case HB_SCRIPT_ARABIC:
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/* Unicode-3.0 additions */
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case HB_SCRIPT_MONGOLIAN:
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case HB_SCRIPT_SYRIAC:
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/* Unicode-5.0 additions */
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case HB_SCRIPT_NKO:
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case HB_SCRIPT_PHAGS_PA:
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/* Unicode-6.0 additions */
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case HB_SCRIPT_MANDAIC:
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/* Unicode-7.0 additions */
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case HB_SCRIPT_MANICHAEAN:
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case HB_SCRIPT_PSALTER_PAHLAVI:
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/* Unicode-9.0 additions */
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case HB_SCRIPT_ADLAM:
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/* Unicode-11.0 additions */
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case HB_SCRIPT_HANIFI_ROHINGYA:
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case HB_SCRIPT_SOGDIAN:
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/* For Arabic script, use the Arabic shaper even if no OT script tag was found.
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* This is because we do fallback shaping for Arabic script (and not others).
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* But note that Arabic shaping is applicable only to horizontal layout; for
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* vertical text, just use the generic shaper instead. */
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if ((planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT ||
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planner->props.script == HB_SCRIPT_ARABIC) &&
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HB_DIRECTION_IS_HORIZONTAL(planner->props.direction))
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return &_hb_ot_complex_shaper_arabic;
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else
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return &_hb_ot_complex_shaper_default;
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/* Unicode-1.1 additions */
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case HB_SCRIPT_THAI:
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case HB_SCRIPT_LAO:
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return &_hb_ot_complex_shaper_thai;
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/* Unicode-1.1 additions */
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case HB_SCRIPT_HANGUL:
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return &_hb_ot_complex_shaper_hangul;
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/* Unicode-1.1 additions */
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case HB_SCRIPT_HEBREW:
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return &_hb_ot_complex_shaper_hebrew;
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/* Unicode-1.1 additions */
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case HB_SCRIPT_BENGALI:
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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_KANNADA:
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case HB_SCRIPT_MALAYALAM:
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case HB_SCRIPT_ORIYA:
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case HB_SCRIPT_TAMIL:
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case HB_SCRIPT_TELUGU:
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/* Unicode-3.0 additions */
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case HB_SCRIPT_SINHALA:
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/* If the designer designed the font for the 'DFLT' script,
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* (or we ended up arbitrarily pick 'latn'), use the default shaper.
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* Otherwise, use the specific shaper.
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*
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* If it's indy3 tag, send to USE. */
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if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
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planner->map.chosen_script[0] == HB_TAG ('l','a','t','n'))
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return &_hb_ot_complex_shaper_default;
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else if ((planner->map.chosen_script[0] & 0x000000FF) == '3')
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return &_hb_ot_complex_shaper_use;
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else
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return &_hb_ot_complex_shaper_indic;
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case HB_SCRIPT_KHMER:
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return &_hb_ot_complex_shaper_khmer;
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case HB_SCRIPT_MYANMAR:
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/* If the designer designed the font for the 'DFLT' script,
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* (or we ended up arbitrarily pick 'latn'), use the default shaper.
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* Otherwise, use the specific shaper.
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*
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* If designer designed for 'mymr' tag, also send to default
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* shaper. That's tag used from before Myanmar shaping spec
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* was developed. The shaping spec uses 'mym2' tag. */
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if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
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planner->map.chosen_script[0] == HB_TAG ('l','a','t','n') ||
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planner->map.chosen_script[0] == HB_TAG ('m','y','m','r'))
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return &_hb_ot_complex_shaper_default;
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else
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return &_hb_ot_complex_shaper_myanmar;
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/* https://github.com/harfbuzz/harfbuzz/issues/1162 */
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case HB_SCRIPT_MYANMAR_ZAWGYI:
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return &_hb_ot_complex_shaper_myanmar_zawgyi;
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/* Unicode-2.0 additions */
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case HB_SCRIPT_TIBETAN:
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/* Unicode-3.0 additions */
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//case HB_SCRIPT_MONGOLIAN:
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//case HB_SCRIPT_SINHALA:
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/* Unicode-3.2 additions */
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case HB_SCRIPT_BUHID:
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case HB_SCRIPT_HANUNOO:
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case HB_SCRIPT_TAGALOG:
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case HB_SCRIPT_TAGBANWA:
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/* Unicode-4.0 additions */
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case HB_SCRIPT_LIMBU:
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case HB_SCRIPT_TAI_LE:
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/* Unicode-4.1 additions */
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case HB_SCRIPT_BUGINESE:
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case HB_SCRIPT_KHAROSHTHI:
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case HB_SCRIPT_SYLOTI_NAGRI:
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case HB_SCRIPT_TIFINAGH:
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/* Unicode-5.0 additions */
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case HB_SCRIPT_BALINESE:
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//case HB_SCRIPT_NKO:
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//case HB_SCRIPT_PHAGS_PA:
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/* Unicode-5.1 additions */
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case HB_SCRIPT_CHAM:
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case HB_SCRIPT_KAYAH_LI:
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case HB_SCRIPT_LEPCHA:
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case HB_SCRIPT_REJANG:
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case HB_SCRIPT_SAURASHTRA:
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case HB_SCRIPT_SUNDANESE:
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/* Unicode-5.2 additions */
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case HB_SCRIPT_EGYPTIAN_HIEROGLYPHS:
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case HB_SCRIPT_JAVANESE:
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case HB_SCRIPT_KAITHI:
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case HB_SCRIPT_MEETEI_MAYEK:
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case HB_SCRIPT_TAI_THAM:
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case HB_SCRIPT_TAI_VIET:
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/* Unicode-6.0 additions */
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case HB_SCRIPT_BATAK:
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case HB_SCRIPT_BRAHMI:
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//case HB_SCRIPT_MANDAIC:
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/* Unicode-6.1 additions */
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case HB_SCRIPT_CHAKMA:
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case HB_SCRIPT_SHARADA:
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case HB_SCRIPT_TAKRI:
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/* Unicode-7.0 additions */
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case HB_SCRIPT_DUPLOYAN:
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case HB_SCRIPT_GRANTHA:
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case HB_SCRIPT_KHOJKI:
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case HB_SCRIPT_KHUDAWADI:
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case HB_SCRIPT_MAHAJANI:
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//case HB_SCRIPT_MANICHAEAN:
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case HB_SCRIPT_MODI:
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case HB_SCRIPT_PAHAWH_HMONG:
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//case HB_SCRIPT_PSALTER_PAHLAVI:
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case HB_SCRIPT_SIDDHAM:
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case HB_SCRIPT_TIRHUTA:
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|
|
|
||
|
|
/* Unicode-8.0 additions */
|
||
|
|
case HB_SCRIPT_AHOM:
|
||
|
|
|
||
|
|
/* Unicode-9.0 additions */
|
||
|
|
//case HB_SCRIPT_ADLAM:
|
||
|
|
case HB_SCRIPT_BHAIKSUKI:
|
||
|
|
case HB_SCRIPT_MARCHEN:
|
||
|
|
case HB_SCRIPT_NEWA:
|
||
|
|
|
||
|
|
/* Unicode-10.0 additions */
|
||
|
|
case HB_SCRIPT_MASARAM_GONDI:
|
||
|
|
case HB_SCRIPT_SOYOMBO:
|
||
|
|
case HB_SCRIPT_ZANABAZAR_SQUARE:
|
||
|
|
|
||
|
|
/* Unicode-11.0 additions */
|
||
|
|
case HB_SCRIPT_DOGRA:
|
||
|
|
case HB_SCRIPT_GUNJALA_GONDI:
|
||
|
|
//case HB_SCRIPT_HANIFI_ROHINGYA:
|
||
|
|
case HB_SCRIPT_MAKASAR:
|
||
|
|
//case HB_SCRIPT_SOGDIAN:
|
||
|
|
|
||
|
|
/* Unicode-12.0 additions */
|
||
|
|
case HB_SCRIPT_NANDINAGARI:
|
||
|
|
|
||
|
|
/* Unicode-13.0 additions */
|
||
|
|
case HB_SCRIPT_CHORASMIAN:
|
||
|
|
case HB_SCRIPT_DIVES_AKURU:
|
||
|
|
|
||
|
|
/* If the designer designed the font for the 'DFLT' script,
|
||
|
|
* (or we ended up arbitrarily pick 'latn'), use the default shaper.
|
||
|
|
* Otherwise, use the specific shaper.
|
||
|
|
* Note that for some simple scripts, there may not be *any*
|
||
|
|
* GSUB/GPOS needed, so there may be no scripts found! */
|
||
|
|
if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
|
||
|
|
planner->map.chosen_script[0] == HB_TAG ('l','a','t','n'))
|
||
|
|
return &_hb_ot_complex_shaper_default;
|
||
|
|
else
|
||
|
|
return &_hb_ot_complex_shaper_use;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* HB_OT_SHAPE_COMPLEX_HH */
|