/*
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* This is part of HarfBuzz, an OpenType Layout engine 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 "harfbuzz-shaper.h"
#include "harfbuzz-shaper-private.h"
#include <assert.h>
#include <stdio.h>
enum MymrCharClassValues
{
Mymr_CC_RESERVED = 0,
Mymr_CC_CONSONANT = 1, /* Consonant of type 1, that has subscript form */
Mymr_CC_CONSONANT2 = 2, /* Consonant of type 2, that has no subscript form */
Mymr_CC_NGA = 3, /* Consonant NGA */
Mymr_CC_YA = 4, /* Consonant YA */
Mymr_CC_RA = 5, /* Consonant RA */
Mymr_CC_WA = 6, /* Consonant WA */
Mymr_CC_HA = 7, /* Consonant HA */
Mymr_CC_IND_VOWEL = 8, /* Independent vowel */
Mymr_CC_ZERO_WIDTH_NJ_MARK = 9, /* Zero Width non joiner character (0x200C) */
Mymr_CC_VIRAMA = 10, /* Subscript consonant combining character */
Mymr_CC_PRE_VOWEL = 11, /* Dependent vowel, prebase (Vowel e) */
Mymr_CC_BELOW_VOWEL = 12, /* Dependent vowel, prebase (Vowel u, uu) */
Mymr_CC_ABOVE_VOWEL = 13, /* Dependent vowel, prebase (Vowel i, ii, ai) */
Mymr_CC_POST_VOWEL = 14, /* Dependent vowel, prebase (Vowel aa) */
Mymr_CC_SIGN_ABOVE = 15,
Mymr_CC_SIGN_BELOW = 16,
Mymr_CC_SIGN_AFTER = 17,
Mymr_CC_ZERO_WIDTH_J_MARK = 18, /* Zero width joiner character */
Mymr_CC_COUNT = 19 /* This is the number of character classes */
};
enum MymrCharClassFlags
{
Mymr_CF_CLASS_MASK = 0x0000FFFF,
Mymr_CF_CONSONANT = 0x01000000, /* flag to speed up comparing */
Mymr_CF_MEDIAL = 0x02000000, /* flag to speed up comparing */
Mymr_CF_IND_VOWEL = 0x04000000, /* flag to speed up comparing */
Mymr_CF_DEP_VOWEL = 0x08000000, /* flag to speed up comparing */
Mymr_CF_DOTTED_CIRCLE = 0x10000000, /* add a dotted circle if a character with this flag is the first in a syllable */
Mymr_CF_VIRAMA = 0x20000000, /* flag to speed up comparing */
/* position flags */
Mymr_CF_POS_BEFORE = 0x00080000,
Mymr_CF_POS_BELOW = 0x00040000,
Mymr_CF_POS_ABOVE = 0x00020000,
Mymr_CF_POS_AFTER = 0x00010000,
Mymr_CF_POS_MASK = 0x000f0000,
Mymr_CF_AFTER_KINZI = 0x00100000
};
/* Characters that get refrered to by name */
enum MymrChar
{
Mymr_C_SIGN_ZWNJ = 0x200C,
Mymr_C_SIGN_ZWJ = 0x200D,
Mymr_C_DOTTED_CIRCLE = 0x25CC,
Mymr_C_RA = 0x101B,
Mymr_C_YA = 0x101A,
Mymr_C_NGA = 0x1004,
Mymr_C_VOWEL_E = 0x1031,
Mymr_C_VIRAMA = 0x1039
};
enum
{
Mymr_xx = Mymr_CC_RESERVED,
Mymr_c1 = Mymr_CC_CONSONANT | Mymr_CF_CONSONANT | Mymr_CF_POS_BELOW,
Mymr_c2 = Mymr_CC_CONSONANT2 | Mymr_CF_CONSONANT,
Mymr_ng = Mymr_CC_NGA | Mymr_CF_CONSONANT | Mymr_CF_POS_ABOVE,
Mymr_ya = Mymr_CC_YA | Mymr_CF_CONSONANT | Mymr_CF_MEDIAL | Mymr_CF_POS_AFTER | Mymr_CF_AFTER_KINZI,
Mymr_ra = Mymr_CC_RA | Mymr_CF_CONSONANT | Mymr_CF_MEDIAL | Mymr_CF_POS_BEFORE,
Mymr_wa = Mymr_CC_WA | Mymr_CF_CONSONANT | Mymr_CF_MEDIAL | Mymr_CF_POS_BELOW,
Mymr_ha = Mymr_CC_HA | Mymr_CF_CONSONANT | Mymr_CF_MEDIAL | Mymr_CF_POS_BELOW,
Mymr_id = Mymr_CC_IND_VOWEL | Mymr_CF_IND_VOWEL,
Mymr_vi = Mymr_CC_VIRAMA | Mymr_CF_VIRAMA | Mymr_CF_POS_ABOVE | Mymr_CF_DOTTED_CIRCLE,
Mymr_dl = Mymr_CC_PRE_VOWEL | Mymr_CF_DEP_VOWEL | Mymr_CF_POS_BEFORE | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_AFTER_KINZI,
Mymr_db = Mymr_CC_BELOW_VOWEL | Mymr_CF_DEP_VOWEL | Mymr_CF_POS_BELOW | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_AFTER_KINZI,
Mymr_da = Mymr_CC_ABOVE_VOWEL | Mymr_CF_DEP_VOWEL | Mymr_CF_POS_ABOVE | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_AFTER_KINZI,
Mymr_dr = Mymr_CC_POST_VOWEL | Mymr_CF_DEP_VOWEL | Mymr_CF_POS_AFTER | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_AFTER_KINZI,
Mymr_sa = Mymr_CC_SIGN_ABOVE | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_POS_ABOVE | Mymr_CF_AFTER_KINZI,
Mymr_sb = Mymr_CC_SIGN_BELOW | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_POS_BELOW | Mymr_CF_AFTER_KINZI,
Mymr_sp = Mymr_CC_SIGN_AFTER | Mymr_CF_DOTTED_CIRCLE | Mymr_CF_AFTER_KINZI
};
typedef int MymrCharClass;
static const MymrCharClass mymrCharClasses[] =
{
Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_ng, Mymr_c1, Mymr_c1, Mymr_c1,
Mymr_c1, Mymr_c1, Mymr_c2, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, /* 1000 - 100F */
Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1, Mymr_c1,
Mymr_c1, Mymr_c1, Mymr_ya, Mymr_ra, Mymr_c1, Mymr_wa, Mymr_c1, Mymr_ha, /* 1010 - 101F */
Mymr_c2, Mymr_c2, Mymr_xx, Mymr_id, Mymr_id, Mymr_id, Mymr_id, Mymr_id,
Mymr_xx, Mymr_id, Mymr_id, Mymr_xx, Mymr_dr, Mymr_da, Mymr_da, Mymr_db, /* 1020 - 102F */
Mymr_db, Mymr_dl, Mymr_da, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_sa, Mymr_sb,
Mymr_sp, Mymr_vi, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, /* 1030 - 103F */
Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx,
Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, /* 1040 - 104F */
Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx,
Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, Mymr_xx, /* 1050 - 105F */
};
static MymrCharClass
getMyanmarCharClass (HB_UChar16 ch)
{
if (ch == Mymr_C_SIGN_ZWJ)
return Mymr_CC_ZERO_WIDTH_J_MARK;
if (ch == Mymr_C_SIGN_ZWNJ)
return Mymr_CC_ZERO_WIDTH_NJ_MARK;
if (ch < 0x1000 || ch > 0x105f)
return Mymr_CC_RESERVED;
return mymrCharClasses[ch - 0x1000];
}
static const signed char mymrStateTable[][Mymr_CC_COUNT] =
{
/* xx c1, c2 ng ya ra wa ha id zwnj vi dl db da dr sa sb sp zwj */
{ 1, 4, 4, 2, 4, 4, 4, 4, 24, 1, 27, 17, 18, 19, 20, 21, 1, 1, 4}, /* 0 - ground state */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* 1 - exit state (or sp to the right of the syllable) */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3, 17, 18, 19, 20, 21, -1, -1, 4}, /* 2 - NGA */
{-1, 4, 4, 4, 4, 4, 4, 4, -1, 23, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* 3 - Virama after NGA */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5, 17, 18, 19, 20, 21, 1, 1, -1}, /* 4 - Base consonant */
{-2, 6, -2, -2, 7, 8, 9, 10, -2, 23, -2, -2, -2, -2, -2, -2, -2, -2, -2}, /* 5 - First virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 25, 17, 18, 19, 20, 21, -1, -1, -1}, /* 6 - c1 after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 12, 17, 18, 19, 20, 21, -1, -1, -1}, /* 7 - ya after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 12, 17, 18, 19, 20, 21, -1, -1, -1}, /* 8 - ra after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 12, 17, 18, 19, 20, 21, -1, -1, -1}, /* 9 - wa after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 17, 18, 19, 20, 21, -1, -1, -1}, /* 10 - ha after virama */
{-1, -1, -1, -1, 7, 8, 9, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* 11 - Virama after NGA+zwj */
{-2, -2, -2, -2, -2, -2, 13, 14, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2}, /* 12 - Second virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15, 17, 18, 19, 20, 21, -1, -1, -1}, /* 13 - wa after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 17, 18, 19, 20, 21, -1, -1, -1}, /* 14 - ha after virama */
{-2, -2, -2, -2, -2, -2, -2, 16, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2}, /* 15 - Third virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 17, 18, 19, 20, 21, -1, -1, -1}, /* 16 - ha after virama */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 20, 21, 1, 1, -1}, /* 17 - dl, Dependent vowel e */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 19, -1, 21, 1, 1, -1}, /* 18 - db, Dependent vowel u,uu */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1, -1}, /* 19 - da, Dependent vowel i,ii,ai */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 22, -1, -1, -1, -1, -1, 1, 1, -1}, /* 20 - dr, Dependent vowel aa */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1}, /* 21 - sa, Sign anusvara */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, 23, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* 22 - atha */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1}, /* 23 - zwnj for atha */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1}, /* 24 - Independent vowel */
{-2, -2, -2, -2, 26, 26, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2}, /* 25 - Virama after subscript consonant */
{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 12, 17, 18, 19, 20, 21, -1, 1, -1}, /* 26 - ra/ya after subscript consonant + virama */
{-1, 6, -1, -1, 7, 8, 9, 10, -1, 23, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* 27 - Virama after ground state */
/* exit state -2 is for invalid order of medials and combination of invalids
with virama where virama should treat as start of next syllable
*/
};
/*#define MYANMAR_DEBUG */
#ifdef MYANMAR_DEBUG
#define MMDEBUG qDebug
#else
#define MMDEBUG if(0) printf
#endif
/*
// Given an input string of characters and a location in which to start looking
// calculate, using the state table, which one is the last character of the syllable
// that starts in the starting position.
*/
static int myanmar_nextSyllableBoundary(const HB_UChar16 *s, int start, int end, HB_Bool *invalid)
{
const HB_UChar16 *uc = s + start;
int state = 0;
int pos = start;
*invalid = FALSE;
while (pos < end) {
MymrCharClass charClass = getMyanmarCharClass(*uc);
state = mymrStateTable[state][charClass & Mymr_CF_CLASS_MASK];
if (pos == start)
*invalid = (HB_Bool)(charClass & Mymr_CF_DOTTED_CIRCLE);
MMDEBUG("state[%d]=%d class=%8x (uc=%4x)", pos - start, state, charClass, *uc);
if (state < 0) {
if (state < -1)
--pos;
break;
}
++uc;
++pos;
}
return pos;
}
#ifndef NO_OPENTYPE
/* ###### might have to change order of above and below forms and substitutions,
but according to Unicode below comes before above */
static const HB_OpenTypeFeature myanmar_features[] = {
{ HB_MAKE_TAG('p', 'r', 'e', 'f'), PreFormProperty },
{ HB_MAKE_TAG('b', 'l', 'w', 'f'), BelowFormProperty },
{ HB_MAKE_TAG('a', 'b', 'v', 'f'), AboveFormProperty },
{ HB_MAKE_TAG('p', 's', 't', 'f'), PostFormProperty },
{ HB_MAKE_TAG('p', 'r', 'e', 's'), PreSubstProperty },
{ HB_MAKE_TAG('b', 'l', 'w', 's'), BelowSubstProperty },
{ HB_MAKE_TAG('a', 'b', 'v', 's'), AboveSubstProperty },
{ HB_MAKE_TAG('p', 's', 't', 's'), PostSubstProperty },
{ HB_MAKE_TAG('r', 'l', 'i', 'g'), CligProperty }, /* Myanmar1 uses this instead of the other features */
{ 0, 0 }
};
#endif
/*
// Visual order before shaping should be:
//
// [Vowel Mark E]
// [Virama + Medial Ra]
// [Base]
// [Virama + Consonant]
// [Nga + Virama] (Kinzi) ### should probably come before post forms (medial ya)
// [Vowels]
// [Marks]
//
// This means that we can keep the logical order apart from having to
// move the pre vowel, medial ra and kinzi
*/
static HB_Bool myanmar_shape_syllable(HB_Bool openType, HB_ShaperItem *item, HB_Bool invalid)
{
/*
// MMDEBUG("\nsyllable from %d len %d, str='%s'", item->item.pos, item->item.length,
// item->string->mid(item->from, item->length).toUtf8().data());
*/
#ifndef NO_OPENTYPE
const int availableGlyphs = item->num_glyphs;
#endif
const HB_UChar16 *uc = item->string + item->item.pos;
int vowel_e = -1;
int kinzi = -1;
int medial_ra = -1;
int base = -1;
int i;
int len = 0;
unsigned short reordered[32];
unsigned char properties[32];
enum {
AboveForm = 0x01,
PreForm = 0x02,
PostForm = 0x04,
BelowForm = 0x08
};
HB_Bool lastWasVirama = FALSE;
int basePos = -1;
memset(properties, 0, 32*sizeof(unsigned char));
/* according to the table the max length of a syllable should be around 14 chars */
assert(item->item.length < 32);
#ifdef MYANMAR_DEBUG
printf("original:");
for (i = 0; i < (int)item->item.length; i++) {
printf(" %d: %4x", i, uc[i]);
}
#endif
for (i = 0; i < (int)item->item.length; ++i) {
HB_UChar16 chr = uc[i];
if (chr == Mymr_C_VOWEL_E) {
vowel_e = i;
continue;
}
if (i == 0
&& chr == Mymr_C_NGA
&& i + 2 < (int)item->item.length
&& uc[i+1] == Mymr_C_VIRAMA) {
int mc = getMyanmarCharClass(uc[i+2]);
/*MMDEBUG("maybe kinzi: mc=%x", mc);*/
if ((mc & Mymr_CF_CONSONANT) == Mymr_CF_CONSONANT) {
kinzi = i;
continue;
}
}
if (base >= 0
&& chr == Mymr_C_VIRAMA
&& i + 1 < (int)item->item.length
&& uc[i+1] == Mymr_C_RA) {
medial_ra = i;
continue;
}
if (base < 0)
base = i;
}
MMDEBUG("\n base=%d, vowel_e=%d, kinzi=%d, medial_ra=%d", base, vowel_e, kinzi, medial_ra);
/* write vowel_e if found */
if (vowel_e >= 0) {
reordered[0] = Mymr_C_VOWEL_E;
len = 1;
}
/* write medial_ra */
if (medial_ra >= 0) {
reordered[len] = Mymr_C_VIRAMA;
reordered[len+1] = Mymr_C_RA;
properties[len] = PreForm;
properties[len+1] = PreForm;
len += 2;
}
/* shall we add a dotted circle?
If in the position in which the base should be (first char in the string) there is
a character that has the Dotted circle flag (a character that cannot be a base)
then write a dotted circle */
if (invalid) {
reordered[len] = C_DOTTED_CIRCLE;
++len;
}
/* copy the rest of the syllable to the output, inserting the kinzi
at the correct place */
for (i = 0; i < (int)item->item.length; ++i) {
hb_uint16 chr = uc[i];
MymrCharClass cc;
if (i == vowel_e)
continue;
if (i == medial_ra || i == kinzi) {
++i;
continue;
}
cc = getMyanmarCharClass(uc[i]);
if (kinzi >= 0 && i > base && (cc & Mymr_CF_AFTER_KINZI)) {
reordered[len] = Mymr_C_NGA;
reordered[len+1] = Mymr_C_VIRAMA;
if (len > 0)
properties[len-1] = AboveForm;
properties[len] = AboveForm;
len += 2;
kinzi = -1;
}
if (lastWasVirama) {
int prop = 0;
switch(cc & Mymr_CF_POS_MASK) {
case Mymr_CF_POS_BEFORE:
prop = PreForm;
break;
case Mymr_CF_POS_BELOW:
prop = BelowForm;
break;
case Mymr_CF_POS_ABOVE:
prop = AboveForm;
break;
case Mymr_CF_POS_AFTER:
prop = PostForm;
break;
default:
break;
}
properties[len-1] = prop;
properties[len] = prop;
if(basePos >= 0 && basePos == len-2)
properties[len-2] = prop;
}
lastWasVirama = (chr == Mymr_C_VIRAMA);
if(i == base)
basePos = len;
if ((chr != Mymr_C_SIGN_ZWNJ && chr != Mymr_C_SIGN_ZWJ) || !len) {
reordered[len] = chr;
++len;
}
}
if (kinzi >= 0) {
reordered[len] = Mymr_C_NGA;
reordered[len+1] = Mymr_C_VIRAMA;
properties[len] = AboveForm;
properties[len+1] = AboveForm;
len += 2;
}
if (!item->font->klass->convertStringToGlyphIndices(item->font,
reordered, len,
item->glyphs, &item->num_glyphs,
item->item.bidiLevel % 2))
return FALSE;
MMDEBUG("after shaping: len=%d", len);
for (i = 0; i < len; i++) {
item->attributes[i].mark = FALSE;
item->attributes[i].clusterStart = FALSE;
item->attributes[i].justification = 0;
item->attributes[i].zeroWidth = FALSE;
MMDEBUG(" %d: %4x property=%x", i, reordered[i], properties[i]);
}
/* now we have the syllable in the right order, and can start running it through open type. */
#ifndef NO_OPENTYPE
if (openType) {
hb_uint32 where[32];
for (i = 0; i < len; ++i) {
where[i] = ~(PreSubstProperty
| BelowSubstProperty
| AboveSubstProperty
| PostSubstProperty
| CligProperty
| PositioningProperties);
if (properties[i] & PreForm)
where[i] &= ~PreFormProperty;
if (properties[i] & BelowForm)
where[i] &= ~BelowFormProperty;
if (properties[i] & AboveForm)
where[i] &= ~AboveFormProperty;
if (properties[i] & PostForm)
where[i] &= ~PostFormProperty;
}
HB_OpenTypeShape(item, where);
if (!HB_OpenTypePosition(item, availableGlyphs, /*doLogClusters*/FALSE))
return FALSE;
} else
#endif
{
MMDEBUG("Not using openType");
HB_HeuristicPosition(item);
}
item->attributes[0].clusterStart = TRUE;
return TRUE;
}
HB_Bool HB_MyanmarShape(HB_ShaperItem *item)
{
HB_Bool openType = FALSE;
unsigned short *logClusters = item->log_clusters;
HB_ShaperItem syllable = *item;
int first_glyph = 0;
int sstart = item->item.pos;
int end = sstart + item->item.length;
int i = 0;
assert(item->item.script == HB_Script_Myanmar);
#ifndef NO_OPENTYPE
openType = HB_SelectScript(item, myanmar_features);
#endif
MMDEBUG("myanmar_shape: from %d length %d", item->item.pos, item->item.length);
while (sstart < end) {
HB_Bool invalid;
int send = myanmar_nextSyllableBoundary(item->string, sstart, end, &invalid);
MMDEBUG("syllable from %d, length %d, invalid=%s", sstart, send-sstart,
invalid ? "TRUE" : "FALSE");
syllable.item.pos = sstart;
syllable.item.length = send-sstart;
syllable.glyphs = item->glyphs + first_glyph;
syllable.attributes = item->attributes + first_glyph;
syllable.advances = item->advances + first_glyph;
syllable.offsets = item->offsets + first_glyph;
syllable.num_glyphs = item->num_glyphs - first_glyph;
if (!myanmar_shape_syllable(openType, &syllable, invalid)) {
MMDEBUG("syllable shaping failed, syllable requests %d glyphs", syllable.num_glyphs);
item->num_glyphs += syllable.num_glyphs;
return FALSE;
}
/* fix logcluster array */
MMDEBUG("syllable:");
for (i = first_glyph; i < first_glyph + (int)syllable.num_glyphs; ++i)
MMDEBUG(" %d -> glyph %x", i, item->glyphs[i]);
MMDEBUG(" logclusters:");
for (i = sstart; i < send; ++i) {
MMDEBUG(" %d -> glyph %d", i, first_glyph);
logClusters[i-item->item.pos] = first_glyph;
}
sstart = send;
first_glyph += syllable.num_glyphs;
}
item->num_glyphs = first_glyph;
return TRUE;
}