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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 538 insertions, 0 deletions

diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-myanmar.c b/src/3rdparty/harfbuzz/src/harfbuzz-myanmar.c
new file mode 100644
index 0000000000..4b68e64d85
--- /dev/null
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-myanmar.c
@@ -0,0 +1,538 @@
+/*
+ * 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;
+            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;
+}
+
+void HB_MyanmarAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes)
+{
+    int end = from + len;
+    const HB_UChar16 *uc = text + from;
+    hb_uint32 i = 0;
+    HB_UNUSED(script);
+    attributes += from;
+    while (i < len) {
+	HB_Bool invalid;
+	hb_uint32 boundary = myanmar_nextSyllableBoundary(text, from+i, end, &invalid) - from;
+
+	attributes[i].charStop = TRUE;
+        if (i)
+            attributes[i-1].lineBreakType = HB_Break;
+
+	if (boundary > len-1)
+            boundary = len;
+	i++;
+	while (i < boundary) {
+	    attributes[i].charStop = FALSE;
+	    ++uc;
+	    ++i;
+	}
+	assert(i == boundary);
+    }
+}
+