HarfBuzz text shaping engine
http://harfbuzz.github.io/
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112 lines
3.5 KiB
112 lines
3.5 KiB
/* |
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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-map-private.hh" |
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#include "hb-ot-layout-private.hh" |
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struct hb_ot_shape_plan_t |
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{ |
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hb_segment_properties_t props; |
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const struct hb_ot_complex_shaper_t *shaper; |
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hb_ot_map_t map; |
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const void *data; |
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hb_mask_t rtlm_mask, frac_mask, numr_mask, dnom_mask; |
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hb_mask_t kern_mask; |
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unsigned int has_frac : 1; |
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unsigned int has_kern : 1; |
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unsigned int has_mark : 1; |
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inline void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const |
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{ |
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unsigned int table_index; |
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switch (table_tag) { |
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case HB_OT_TAG_GSUB: table_index = 0; break; |
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case HB_OT_TAG_GPOS: table_index = 1; break; |
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default: return; |
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} |
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map.collect_lookups (table_index, lookups); |
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} |
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inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); } |
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inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); } |
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void init (void) |
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{ |
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memset (this, 0, sizeof (*this)); |
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map.init (); |
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} |
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void fini (void) { |
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map.fini (); |
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} |
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}; |
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struct hb_ot_shape_planner_t |
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{ |
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/* In the order that they are filled in. */ |
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hb_face_t *face; |
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hb_segment_properties_t props; |
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const struct hb_ot_complex_shaper_t *shaper; |
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hb_ot_map_builder_t map; |
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hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) : |
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face (master_plan->face_unsafe), |
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props (master_plan->props), |
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shaper (nullptr), |
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map (face, &props) {} |
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inline void compile (hb_ot_shape_plan_t &plan, |
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const int *coords, |
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unsigned int num_coords) |
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{ |
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plan.props = props; |
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plan.shaper = shaper; |
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map.compile (plan.map, coords, num_coords); |
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plan.rtlm_mask = plan.map.get_1_mask (HB_TAG ('r','t','l','m')); |
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plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c')); |
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plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r')); |
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plan.dnom_mask = plan.map.get_1_mask (HB_TAG ('d','n','o','m')); |
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plan.kern_mask = plan.map.get_mask (HB_DIRECTION_IS_HORIZONTAL (plan.props.direction) ? |
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HB_TAG ('k','e','r','n') : HB_TAG ('v','k','r','n')); |
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plan.has_frac = plan.frac_mask || (plan.numr_mask && plan.dnom_mask); |
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plan.has_kern = !!plan.kern_mask; |
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plan.has_mark = !!plan.map.get_1_mask (HB_TAG ('m','a','r','k')); |
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} |
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private: |
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HB_DISALLOW_COPY_AND_ASSIGN (hb_ot_shape_planner_t); |
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}; |
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#endif /* HB_OT_SHAPE_PRIVATE_HH */
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