130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
/*
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* Copyright © 2010 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_PRIVATE_HH
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#define HB_OT_SHAPE_PRIVATE_HH
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#include "hb-private.hh"
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#include "hb-ot-shape.h"
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#include "hb-ot-map-private.hh"
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#include "hb-ot-shape-complex-private.hh"
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enum hb_ot_complex_shaper_t;
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struct hb_ot_shape_plan_t
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{
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friend struct hb_ot_shape_planner_t;
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hb_ot_map_t map;
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hb_ot_complex_shaper_t shaper;
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hb_ot_shape_plan_t (void) : map () {}
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~hb_ot_shape_plan_t (void) { map.finish (); }
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private:
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NO_COPY (hb_ot_shape_plan_t);
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};
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struct hb_ot_shape_planner_t
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{
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hb_ot_map_builder_t map;
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hb_ot_complex_shaper_t shaper;
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hb_ot_shape_planner_t (void) : map () {}
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~hb_ot_shape_planner_t (void) { map.finish (); }
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inline void compile (hb_face_t *face,
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const hb_segment_properties_t *props,
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struct hb_ot_shape_plan_t &plan)
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{
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plan.shaper = shaper;
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map.compile (face, props, plan.map);
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}
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private:
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NO_COPY (hb_ot_shape_planner_t);
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};
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struct hb_ot_shape_context_t
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{
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/* Input to hb_ot_shape_execute() */
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hb_ot_shape_plan_t *plan;
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hb_font_t *font;
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hb_face_t *face;
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hb_buffer_t *buffer;
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const hb_feature_t *user_features;
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unsigned int num_user_features;
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/* Transient stuff */
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hb_direction_t target_direction;
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hb_bool_t applied_substitute_complex;
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hb_bool_t applied_position_complex;
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};
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static inline hb_bool_t
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is_variation_selector (hb_codepoint_t unicode)
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{
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return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */
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(unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */
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(unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */
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}
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static inline unsigned int
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_hb_unicode_modified_combining_class (hb_unicode_funcs_t *ufuncs,
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hb_codepoint_t unicode)
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{
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int c = hb_unicode_combining_class (ufuncs, unicode);
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/* Modify the combining-class to suit Arabic better. See:
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* http://unicode.org/faq/normalization.html#8
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* http://unicode.org/faq/normalization.html#9
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*/
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if (unlikely (hb_in_range<int> (c, 27, 33)))
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c = c == 33 ? 27 : c + 1;
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return c;
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}
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static inline void
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hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
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{
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info->general_category() = hb_unicode_general_category (unicode, info->codepoint);
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info->combining_class() = _hb_unicode_modified_combining_class (unicode, info->codepoint);
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}
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HB_INTERNAL void _hb_set_unicode_props (hb_buffer_t *buffer);
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HB_INTERNAL void _hb_ot_shape_normalize (hb_ot_shape_context_t *c);
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#endif /* HB_OT_SHAPE_PRIVATE_HH */
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