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

/*
 * Copyright © 2011,2012  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-khmer-machine.hh"
#include "hb-ot-shaper-indic.hh"
#include "hb-ot-layout.hh"


/*
 * Khmer shaper.
 */


static const hb_ot_map_feature_t
khmer_features[] = …;

/*
 * Must be in the same order as the khmer_features array.
 */
enum { … };

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

static bool
setup_syllables_khmer (const hb_ot_shape_plan_t *plan,
		       hb_font_t *font,
		       hb_buffer_t *buffer);
static bool
reorder_khmer (const hb_ot_shape_plan_t *plan,
	       hb_font_t *font,
	       hb_buffer_t *buffer);

static void
collect_features_khmer (hb_ot_shape_planner_t *plan)
{ … }

static void
override_features_khmer (hb_ot_shape_planner_t *plan)
{ … }


struct khmer_shape_plan_t
{ … };

static void *
data_create_khmer (const hb_ot_shape_plan_t *plan)
{ … }

static void
data_destroy_khmer (void *data)
{ … }

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

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


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

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

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

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


static bool
decompose_khmer (const hb_ot_shape_normalize_context_t *c,
		 hb_codepoint_t  ab,
		 hb_codepoint_t *a,
		 hb_codepoint_t *b)
{ … }

static bool
compose_khmer (const hb_ot_shape_normalize_context_t *c,
	       hb_codepoint_t  a,
	       hb_codepoint_t  b,
	       hb_codepoint_t *ab)
{ … }


const hb_ot_shaper_t _hb_ot_shaper_khmer = …;


#endif