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/*
* Copyright © 2010,2012 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-ot-shape-complex-private.hh"
/* TODO Add kana, and other small shapers here */
/* The default shaper *only* adds additional per-script features.*/
static const hb_tag_t hangul_features[] =
{
HB_TAG('l','j','m','o'),
HB_TAG('v','j','m','o'),
HB_TAG('t','j','m','o'),
HB_TAG_NONE
};
static const hb_tag_t tibetan_features[] =
{
HB_TAG('a','b','v','s'),
HB_TAG('b','l','w','s'),
HB_TAG('a','b','v','m'),
HB_TAG('b','l','w','m'),
HB_TAG_NONE
};
static void
collect_features_default (hb_ot_shape_planner_t *plan)
{
const hb_tag_t *script_features = NULL;
switch ((hb_tag_t) plan->props.script)
{
/* Unicode-1.1 additions */
case HB_SCRIPT_HANGUL:
script_features = hangul_features;
break;
/* Unicode-2.0 additions */
case HB_SCRIPT_TIBETAN:
script_features = tibetan_features;
break;
}
for (; script_features && *script_features; script_features++)
plan->map.add_bool_feature (*script_features);
}
static hb_ot_shape_normalization_mode_t
normalization_preference_default (const hb_segment_properties_t *props)
{
switch ((hb_tag_t) props->script)
{
/* Unicode-1.1 additions */
case HB_SCRIPT_HANGUL:
return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_FULL;
}
return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS;
}
static bool
compose_default (const hb_ot_shape_normalize_context_t *c,
hb_codepoint_t a,
hb_codepoint_t b,
hb_codepoint_t *ab)
{
/* Hebrew presentation-form shaping.
* https://bugzilla.mozilla.org/show_bug.cgi?id=728866
* Hebrew presentation forms with dagesh, for characters 0x05D0..0x05EA;
* Note that some letters do not have a dagesh presForm encoded.
*/
static const hb_codepoint_t sDageshForms[0x05EA - 0x05D0 + 1] = {
0xFB30, /* ALEF */
0xFB31, /* BET */
0xFB32, /* GIMEL */
0xFB33, /* DALET */
0xFB34, /* HE */
0xFB35, /* VAV */
0xFB36, /* ZAYIN */
0x0000, /* HET */
0xFB38, /* TET */
0xFB39, /* YOD */
0xFB3A, /* FINAL KAF */
0xFB3B, /* KAF */
0xFB3C, /* LAMED */
0x0000, /* FINAL MEM */
0xFB3E, /* MEM */
0x0000, /* FINAL NUN */
0xFB40, /* NUN */
0xFB41, /* SAMEKH */
0x0000, /* AYIN */
0xFB43, /* FINAL PE */
0xFB44, /* PE */
0x0000, /* FINAL TSADI */
0xFB46, /* TSADI */
0xFB47, /* QOF */
0xFB48, /* RESH */
0xFB49, /* SHIN */
0xFB4A /* TAV */
};
bool found = c->unicode->compose (a, b, ab);
if (!found && (b & ~0x7F) == 0x0580) {
/* Special-case Hebrew presentation forms that are excluded from
* standard normalization, but wanted for old fonts. */
switch (b) {
case 0x05B4: /* HIRIQ */
if (a == 0x05D9) { /* YOD */
*ab = 0xFB1D;
found = true;
}
break;
case 0x05B7: /* patah */
if (a == 0x05F2) { /* YIDDISH YOD YOD */
*ab = 0xFB1F;
found = true;
} else if (a == 0x05D0) { /* ALEF */
*ab = 0xFB2E;
found = true;
}
break;
case 0x05B8: /* QAMATS */
if (a == 0x05D0) { /* ALEF */
*ab = 0xFB2F;
found = true;
}
break;
case 0x05B9: /* HOLAM */
if (a == 0x05D5) { /* VAV */
*ab = 0xFB4B;
found = true;
}
break;
case 0x05BC: /* DAGESH */
if (a >= 0x05D0 && a <= 0x05EA) {
*ab = sDageshForms[a - 0x05D0];
found = (*ab != 0);
} else if (a == 0xFB2A) { /* SHIN WITH SHIN DOT */
*ab = 0xFB2C;
found = true;
} else if (a == 0xFB2B) { /* SHIN WITH SIN DOT */
*ab = 0xFB2D;
found = true;
}
break;
case 0x05BF: /* RAFE */
switch (a) {
case 0x05D1: /* BET */
*ab = 0xFB4C;
found = true;
break;
case 0x05DB: /* KAF */
*ab = 0xFB4D;
found = true;
break;
case 0x05E4: /* PE */
*ab = 0xFB4E;
found = true;
break;
}
break;
case 0x05C1: /* SHIN DOT */
if (a == 0x05E9) { /* SHIN */
*ab = 0xFB2A;
found = true;
} else if (a == 0xFB49) { /* SHIN WITH DAGESH */
*ab = 0xFB2C;
found = true;
}
break;
case 0x05C2: /* SIN DOT */
if (a == 0x05E9) { /* SHIN */
*ab = 0xFB2B;
found = true;
} else if (a == 0xFB49) { /* SHIN WITH DAGESH */
*ab = 0xFB2D;
found = true;
}
break;
}
}
return found;
}
const hb_ot_complex_shaper_t _hb_ot_complex_shaper_default =
{
"default",
collect_features_default,
NULL, /* override_features */
NULL, /* data_create */
NULL, /* data_destroy */
NULL, /* preprocess_text */
normalization_preference_default,
NULL, /* decompose */
compose_default,
NULL, /* setup_masks */
true, /* zero_width_attached_marks */
true, /* fallback_position */
};
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