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-shape.h"
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#include "hb-ot-map-private.hh"
#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
{
friend struct hb_ot_shape_planner_t;
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hb_ot_map_t map;
hb_ot_complex_shaper_t shaper;
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hb_ot_shape_plan_t (void) : map () {}
~hb_ot_shape_plan_t (void) { map.finish (); }
private:
NO_COPY (hb_ot_shape_plan_t);
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};
struct hb_ot_shape_planner_t
{
hb_ot_map_builder_t map;
hb_ot_complex_shaper_t shaper;
hb_ot_shape_planner_t (void) : map () {}
~hb_ot_shape_planner_t (void) { map.finish (); }
inline void compile (hb_face_t *face,
const hb_segment_properties_t *props,
struct hb_ot_shape_plan_t &plan)
{
plan.shaper = shaper;
map.compile (face, props, plan.map);
}
private:
NO_COPY (hb_ot_shape_planner_t);
};
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struct hb_ot_shape_context_t
{
/* Input to hb_ot_shape_execute() */
hb_ot_shape_plan_t *plan;
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hb_font_t *font;
hb_face_t *face;
hb_buffer_t *buffer;
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const hb_feature_t *user_features;
unsigned int num_user_features;
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/* Transient stuff */
hb_direction_t target_direction;
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hb_bool_t applied_substitute_complex;
hb_bool_t applied_position_complex;
};
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static inline hb_bool_t
is_variation_selector (hb_codepoint_t unicode)
{
return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */
(unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */
(unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */
}
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static inline void
hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
{
info->general_category() = hb_unicode_general_category (unicode, info->codepoint);
info->combining_class() = hb_unicode_combining_class (unicode, info->codepoint);
}
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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 */