harfbuzz/src/hb-ot-shape-private.hh

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/*
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* Copyright © 2010 Google, Inc.
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*
* 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_PRIVATE_HH
#define HB_OT_SHAPE_PRIVATE_HH
#include "hb-private.hh"
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#include "hb-ot-map-private.hh"
/* buffer var allocations, used during the entire shaping process */
#define unicode_props0() var1.u8[0]
#define unicode_props1() var1.u8[1]
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struct hb_ot_shape_plan_t
{
hb_segment_properties_t props;
const struct hb_ot_complex_shaper_t *shaper;
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hb_ot_map_t map;
inline void substitute_closure (hb_face_t *face, hb_set_t *glyphs) const { map.substitute_closure (this, face, glyphs); }
inline void substitute (hb_font_t *font, hb_buffer_t *buffer) const { map.substitute (this, font, buffer); }
inline void position (hb_font_t *font, hb_buffer_t *buffer) const { map.position (this, font, buffer); }
void finish (void) { map.finish (); }
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};
struct hb_ot_shape_planner_t
{
/* In the order that they are filled in. */
hb_face_t *face;
hb_segment_properties_t props;
const struct hb_ot_complex_shaper_t *shaper;
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hb_ot_map_builder_t map;
hb_ot_shape_planner_t (const hb_shape_plan_t *master_plan) :
face (master_plan->face),
props (master_plan->props),
shaper (NULL),
map () {}
~hb_ot_shape_planner_t (void) { map.finish (); }
inline void compile (hb_ot_shape_plan_t &plan)
{
plan.props = props;
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plan.shaper = shaper;
map.compile (face, &props, plan.map);
}
private:
NO_COPY (hb_ot_shape_planner_t);
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};
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inline void
_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
{
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info->unicode_props0() = ((unsigned int) unicode->general_category (info->codepoint)) |
(unicode->is_zero_width (info->codepoint) ? 0x80 : 0);
info->unicode_props1() = unicode->modified_combining_class (info->codepoint);
}
inline hb_unicode_general_category_t
_hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
{
return (hb_unicode_general_category_t) (info->unicode_props0() & 0x7F);
}
inline unsigned int
_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
{
return info->unicode_props1();
}
inline hb_bool_t
_hb_glyph_info_is_zero_width (const hb_glyph_info_t *info)
{
return !!(info->unicode_props0() & 0x80);
}
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#endif /* HB_OT_SHAPE_PRIVATE_HH */