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/*
* Copyright © 2021 Behdad Esfahbod.
*
* 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.
*/
#include "hb.hh"
#ifndef HB_NO_OT_SHAPE
#include "hb-ot-shape-complex-syllabic.hh"
void
hb_syllabic_insert_dotted_circles (hb_font_t *font,
hb_buffer_t *buffer,
unsigned int broken_syllable_type,
unsigned int dottedcircle_category,
int repha_category,
int dottedcircle_position)
{
if (unlikely (buffer->flags & HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE))
return;
/* Note: This loop is extra overhead, but should not be measurable.
* TODO Use a buffer scratch flag to remove the loop. */
bool has_broken_syllables = false;
unsigned int count = buffer->len;
hb_glyph_info_t *info = buffer->info;
for (unsigned int i = 0; i < count; i++)
if ((info[i].syllable() & 0x0F) == broken_syllable_type)
{
has_broken_syllables = true;
break;
}
if (likely (!has_broken_syllables))
return;
hb_codepoint_t dottedcircle_glyph;
if (!font->get_nominal_glyph (0x25CCu, &dottedcircle_glyph))
return;
hb_glyph_info_t dottedcircle = {0};
dottedcircle.codepoint = 0x25CCu;
dottedcircle.complex_var_u8_category() = dottedcircle_category;
if (dottedcircle_position != -1)
dottedcircle.complex_var_u8_auxiliary() = dottedcircle_position;
dottedcircle.codepoint = dottedcircle_glyph;
buffer->clear_output ();
buffer->idx = 0;
unsigned int last_syllable = 0;
while (buffer->idx < buffer->len && buffer->successful)
{
unsigned int syllable = buffer->cur().syllable();
if (unlikely (last_syllable != syllable && (syllable & 0x0F) == broken_syllable_type))
{
last_syllable = syllable;
hb_glyph_info_t ginfo = dottedcircle;
ginfo.cluster = buffer->cur().cluster;
ginfo.mask = buffer->cur().mask;
ginfo.syllable() = buffer->cur().syllable();
/* Insert dottedcircle after possible Repha. */
if (repha_category != -1)
{
while (buffer->idx < buffer->len && buffer->successful &&
last_syllable == buffer->cur().syllable() &&
buffer->cur().complex_var_u8_category() == (unsigned) repha_category)
(void) buffer->next_glyph ();
}
(void) buffer->output_info (ginfo);
}
else
(void) buffer->next_glyph ();
}
buffer->swap_buffers ();
}
#endif
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