chromium/third_party/harfbuzz-ng/src/src/hb-ot-shaper-myanmar.cc

/*
 * Copyright © 2011,2012,2013  Google, Inc.
 *
 *  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
 */

#include "hb.hh"

#ifndef HB_NO_OT_SHAPE

#include "hb-ot-shaper-myanmar-machine.hh"
#include "hb-ot-shaper-indic.hh"
#include "hb-ot-layout.hh"


/*
 * Myanmar shaper.
 */


static const hb_tag_t
myanmar_basic_features[] = …;
static const hb_tag_t
myanmar_other_features[] = …;

static inline void
set_myanmar_properties (hb_glyph_info_t &info)
{ … }


static inline bool
is_one_of_myanmar (const hb_glyph_info_t &info, unsigned int flags)
{ … }

/* Note:
 *
 * We treat Vowels and placeholders as if they were consonants.  This is safe because Vowels
 * cannot happen in a consonant syllable.  The plus side however is, we can call the
 * consonant syllable logic from the vowel syllable function and get it all right!
 *
 * Keep in sync with consonant_categories in the generator. */
#define CONSONANT_FLAGS_MYANMAR …

static inline bool
is_consonant_myanmar (const hb_glyph_info_t &info)
{ … }


static bool
setup_syllables_myanmar (const hb_ot_shape_plan_t *plan,
			 hb_font_t *font,
			 hb_buffer_t *buffer);
static bool
reorder_myanmar (const hb_ot_shape_plan_t *plan,
		 hb_font_t *font,
		 hb_buffer_t *buffer);

static void
collect_features_myanmar (hb_ot_shape_planner_t *plan)
{ … }

static void
setup_masks_myanmar (const hb_ot_shape_plan_t *plan HB_UNUSED,
		     hb_buffer_t              *buffer,
		     hb_font_t                *font HB_UNUSED)
{ … }

static bool
setup_syllables_myanmar (const hb_ot_shape_plan_t *plan HB_UNUSED,
			 hb_font_t *font HB_UNUSED,
			 hb_buffer_t *buffer)
{ … }

static int
compare_myanmar_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
{ … }


/* Rules from:
 * https://docs.microsoft.com/en-us/typography/script-development/myanmar */

static void
initial_reordering_consonant_syllable (hb_buffer_t *buffer,
				       unsigned int start, unsigned int end)
{ … }

static void
reorder_syllable_myanmar (const hb_ot_shape_plan_t *plan HB_UNUSED,
			  hb_face_t *face HB_UNUSED,
			  hb_buffer_t *buffer,
			  unsigned int start, unsigned int end)
{ … }

static bool
reorder_myanmar (const hb_ot_shape_plan_t *plan,
		 hb_font_t *font,
		 hb_buffer_t *buffer)
{ … }


const hb_ot_shaper_t _hb_ot_shaper_myanmar = …;


#ifndef HB_NO_OT_SHAPER_MYANMAR_ZAWGYI
/* Ugly Zawgyi encoding.
 * Disable all auto processing.
 * https://github.com/harfbuzz/harfbuzz/issues/1162 */
const hb_ot_shaper_t _hb_ot_shaper_myanmar_zawgyi = …;
#endif


#endif