Merge branch 'qt-4.8-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration into master-integrationv4.8.0

* 'qt-4.8-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration:
  Reduce unnecessary QtCore DLL loads during Symbian app thread creation
  Fix HarfBuzz Thai character SARA AM handling

3 files changed, 352 insertions, 40 deletions

diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-shaper-private.h b/src/3rdparty/harfbuzz/src/harfbuzz-shaper-private.h
index e1360c7..05214e7 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-shaper-private.h
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-shaper-private.h
@@ -111,6 +111,7 @@ extern HB_Bool HB_HangulShape(HB_ShaperItem *shaper_item);
 extern HB_Bool HB_MyanmarShape(HB_ShaperItem *shaper_item);
 extern HB_Bool HB_KhmerShape(HB_ShaperItem *shaper_item);
 extern HB_Bool HB_IndicShape(HB_ShaperItem *shaper_item);
+extern HB_Bool HB_ThaiShape(HB_ShaperItem *shaper_item);
 
 extern void HB_TibetanAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes);
 
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
index 7f4bb0c..0734442 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
@@ -630,7 +630,7 @@ const HB_ScriptEngine HB_ScriptEngines[] = {
     // Sinhala
     { HB_IndicShape, HB_IndicAttributes },
     // Thai
-    { HB_BasicShape, HB_ThaiAttributes },
+    { HB_ThaiShape, HB_ThaiAttributes },
     // Lao
     { HB_BasicShape, 0 },
     // Tibetan
@@ -1337,18 +1337,18 @@ HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool do
 
 #ifdef OT_DEBUG
     if (doLogClusters) {
-        DEBUG("log clusters after shaping:");
-        for (int j = 0; j < length; j++)
-            DEBUG("    log[%d] = %d", j, item->log_clusters[j]);
+        DEBUG("log clusters after shaping:\n");
+        for (unsigned int j = 0; j < item->item.length; j++)
+            DEBUG("    log[%d] = %d\n", j, item->log_clusters[j]);
     }
-    DEBUG("final glyphs:");
-    for (int i = 0; i < (int)hb_buffer->in_length; ++i)
-        DEBUG("   glyph=%4x char_index=%d mark: %d cmp: %d, clusterStart: %d advance=%d/%d offset=%d/%d",
-               glyphs[i].glyph, hb_buffer->in_string[i].cluster, glyphs[i].attributes.mark,
-               glyphs[i].attributes.combiningClass, glyphs[i].attributes.clusterStart,
-               glyphs[i].advance.x.toInt(), glyphs[i].advance.y.toInt(),
-               glyphs[i].offset.x.toInt(), glyphs[i].offset.y.toInt());
-    DEBUG("-----------------------------------------");
+    DEBUG("final glyphs:\n");
+    for (unsigned int i = 0; i < item->num_glyphs; ++i)
+        DEBUG("   glyph=%4x char_index=%d mark: %d cmp: %d, clusterStart: %d advance=%d offset=%d/%d\n",
+               glyphs[i], face->buffer->in_string[i].cluster, attributes[i].mark,
+               attributes[i].combiningClass, attributes[i].clusterStart,
+               item->advances[i] >> 6,
+               item->offsets[i].x >> 6, item->offsets[i].y >> 6);
+    DEBUG("-----------------------------------------\n");
 #endif
     return true;
 }
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c b/src/3rdparty/harfbuzz/src/harfbuzz-thai.c
index e80e2c5..262cee6 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-thai.c
@@ -29,15 +29,41 @@
 #include <assert.h>
 #include <stdio.h>
 
-typedef int (*th_brk_def)(const char*, int[], int);
+#define LIBTHAI_MAJOR   0
+
+/*
+ * if libthai changed please update these codes too.
+ */
+struct thcell_t {
+    unsigned char base;      /**< base character */
+    unsigned char hilo;      /**< upper/lower vowel/diacritic */
+    unsigned char top;       /**< top-level mark */
+};
+typedef int (*th_brk_def) (const unsigned char*, int*, size_t);
+typedef int (*th_render_cell_tis_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
+typedef int (*th_render_cell_win_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
+typedef int (*th_render_cell_mac_def) (struct thcell_t cell, unsigned char res[], size_t res_sz, int is_decomp_am);
+typedef size_t (*th_next_cell_def) (const unsigned char *, size_t, struct thcell_t *, int);
+
+/* libthai releated function handles */
 static th_brk_def th_brk = 0;
-static int libthai_resolved = 0;
+static th_next_cell_def th_next_cell = 0;
+static th_render_cell_tis_def th_render_cell_tis = 0;
+static th_render_cell_win_def th_render_cell_win = 0;
+static th_render_cell_mac_def th_render_cell_mac = 0;
 
-static void resolve_libthai()
-{
-    if (!th_brk)
-        th_brk = (th_brk_def)HB_Library_Resolve("thai", 0, "th_brk");
-    libthai_resolved = 1;
+static int init_libthai() {
+    if (!th_brk || !th_next_cell || !th_render_cell_tis || !th_render_cell_win || !th_render_cell_mac) {
+        th_brk = (th_brk_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_brk");
+        th_next_cell = (th_next_cell_def)HB_Library_Resolve("thai", LIBTHAI_MAJOR, "th_next_cell");
+        th_render_cell_tis = (th_render_cell_tis_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_tis");
+        th_render_cell_win = (th_render_cell_win_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_win");
+        th_render_cell_mac = (th_render_cell_mac_def) HB_Library_Resolve("thai", (int)LIBTHAI_MAJOR, "th_render_cell_mac");
+    }
+    if (th_brk && th_next_cell && th_render_cell_tis && th_render_cell_win && th_render_cell_mac)
+        return 1;
+    else
+        return 0;
 }
 
 static void to_tis620(const HB_UChar16 *string, hb_uint32 len, const char *cstr)
@@ -57,46 +83,329 @@ static void to_tis620(const HB_UChar16 *string, hb_uint32 len, const char *cstr)
     result[len] = 0;
 }
 
-static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttributes *attributes)
+/*
+ * ---------------------------------------------------------------------------
+ * Thai Shaper / Attributes
+ * ---------------------------------------------------------------------------
+ */
+
+/*
+ * USe basic_features prepare for future adding.
+ */
+#ifndef NO_OPENTYPE
+static const HB_OpenTypeFeature thai_features[] = {
+    { HB_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty },
+    { HB_MAKE_TAG('l', 'i', 'g', 'a'), CcmpProperty },
+    { HB_MAKE_TAG('c', 'l', 'i', 'g'), CcmpProperty },
+    {0, 0}
+};
+#endif
+
+/* TIS-to-Unicode glyph maps for characters 0x80-0xff */
+static int tis620_0[128] = {
+    /**/ 0,      0,      0,      0,      0,      0,      0,      0,
+    /**/ 0,      0,      0,      0,      0,      0,      0,      0,
+    /**/ 0,      0,      0,      0,      0,      0,      0,      0,
+    /**/ 0,      0,      0,      0,      0,      0,      0,      0,
+    0x0020, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
+    0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
+    0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
+    0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
+    0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
+    0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
+    0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
+    0x0e38, 0x0e39, 0x0e3a,      0,      0,      0,      0, 0x0e3f,
+    0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
+    0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
+    0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
+    0x0e58, 0x0e59, 0x0e5a, 0x0e5b,      0,      0,      0,      0
+};
+
+static int tis620_1[128] = {
+    0xf89e,      0,      0, 0xf88c, 0xf88f, 0xf892, 0xf895, 0xf898,
+    0xf88b, 0xf88e, 0xf891, 0xf894, 0xf897,      0,      0, 0xf899,
+    0xf89a,      0, 0xf884, 0xf889, 0xf885, 0xf886, 0xf887, 0xf888,
+    0xf88a, 0xf88d, 0xf890, 0xf893, 0xf896,      0,      0,      0,
+    /**/ 0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
+    0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
+    0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
+    0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
+    0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
+    0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
+    0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
+    0x0e38, 0x0e39, 0x0e3a,      0,      0,      0,      0, 0x0e3f,
+    0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
+    0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d,      0, 0x0e4f,
+    0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
+    0x0e58, 0x0e59,      0,      0, 0xf89b, 0xf89c, 0xf89d,      0
+};
+
+static int tis620_2[128] = {
+    0xf700, 0xf701, 0xf702, 0xf703, 0xf704, 0x2026, 0xf705, 0xf706,
+    0xf707, 0xf708, 0xf709, 0xf70a, 0xf70b, 0xf70c, 0xf70d, 0xf70e,
+    0xf70f, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
+    0xf710, 0xf711, 0xf712, 0xf713, 0xf714, 0xf715, 0xf716, 0xf717,
+    0x00a0, 0x0e01, 0x0e02, 0x0e03, 0x0e04, 0x0e05, 0x0e06, 0x0e07,
+    0x0e08, 0x0e09, 0x0e0a, 0x0e0b, 0x0e0c, 0x0e0d, 0x0e0e, 0x0e0f,
+    0x0e10, 0x0e11, 0x0e12, 0x0e13, 0x0e14, 0x0e15, 0x0e16, 0x0e17,
+    0x0e18, 0x0e19, 0x0e1a, 0x0e1b, 0x0e1c, 0x0e1d, 0x0e1e, 0x0e1f,
+    0x0e20, 0x0e21, 0x0e22, 0x0e23, 0x0e24, 0x0e25, 0x0e26, 0x0e27,
+    0x0e28, 0x0e29, 0x0e2a, 0x0e2b, 0x0e2c, 0x0e2d, 0x0e2e, 0x0e2f,
+    0x0e30, 0x0e31, 0x0e32, 0x0e33, 0x0e34, 0x0e35, 0x0e36, 0x0e37,
+    0x0e38, 0x0e39, 0x0e3a,      0,      0,      0,      0, 0x0e3f,
+    0x0e40, 0x0e41, 0x0e42, 0x0e43, 0x0e44, 0x0e45, 0x0e46, 0x0e47,
+    0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d, 0x0e4e, 0x0e4f,
+    0x0e50, 0x0e51, 0x0e52, 0x0e53, 0x0e54, 0x0e55, 0x0e56, 0x0e57,
+    0x0e58, 0x0e59, 0x0e5a, 0x0e5b, 0xf718, 0xf719, 0xf71a,      0
+};
+
+enum ThaiFontType {
+    TIS,
+    WIN,
+    MAC,
+};
+
+static int thai_get_glyph_index (ThaiFontType font_type, unsigned char c)
+{
+    switch (font_type){
+        case TIS: return (c & 0x80) ? tis620_0[c & 0x7f] : c;
+        case WIN: return (c & 0x80) ? tis620_1[c & 0x7f] : c;
+        case MAC: return (c & 0x80) ? tis620_2[c & 0x7f] : c;
+        default:  return 0;
+    }
+}
+
+static int thai_contain_glyphs (HB_ShaperItem *shaper_item, const int glyph_map[128])
+{
+    unsigned char c;
+
+    for (c = 0; c < 0x80; c++) {
+        if ( glyph_map[c] ) {
+            if ( !shaper_item->font->klass->canRender (shaper_item->font, (HB_UChar16 *) &glyph_map[c], 1) )
+                return 0;
+        }
+    }
+    return 1;
+}
+
+static ThaiFontType getThaiFontType(HB_ShaperItem *shaper_item)
+{
+    if ( thai_contain_glyphs (shaper_item, tis620_2) )
+        return MAC;
+    else if ( thai_contain_glyphs (shaper_item, tis620_1) )
+        return WIN;
+    else
+        return TIS;
+}
+
+/*
+ * convert to the correct display level of THAI vowels and marks.
+ */
+static HB_Bool HB_ThaiConvertStringToGlyphIndices (HB_ShaperItem *item)
 {
     char s[128];
     char *cstr = s;
-    int brp[128];
-    int *break_positions = brp;
-    hb_uint32 numbreaks;
-    hb_uint32 i;
+    const HB_UChar16 *string = item->string + item->item.pos;
+    const hb_uint32 len = item->item.length;
+    unsigned short *logClusters = item->log_clusters;
+    hb_uint32 i = 0, slen = 0;
 
-    if (!libthai_resolved)
-        resolve_libthai();
-
-    if (!th_brk)
-        return;
+    if (!init_libthai())
+        return HB_BasicShape (item);
 
     if (len >= 128)
         cstr = (char *)malloc(len*sizeof(char) + 1);
 
+    if (!cstr)
+        return HB_BasicShape (item);
+
     to_tis620(string, len, cstr);
 
-    numbreaks = th_brk(cstr, break_positions, 128);
-    if (numbreaks > 128) {
-        break_positions = (int *)malloc(numbreaks * sizeof(int));
-        numbreaks = th_brk(cstr, break_positions, numbreaks);
+    /* Get font type */
+    static ThaiFontType font_type;
+    static HB_Font itemFont;
+    if (itemFont != item->font) {
+        font_type = getThaiFontType (item);
+        itemFont = item->font;
+    }
+
+    /* allocate temporary glyphs buffers */
+    HB_STACKARRAY (HB_UChar16, glyphString, (item->item.length * 2));
+
+    while (i < item->item.length) {
+        struct thcell_t tis_cell;
+        unsigned char rglyphs[4];
+        int cell_length;
+        int lgn = 0;
+        HB_Bool haveSaraAm = false;
+
+        cell_length = th_next_cell ((const unsigned char *)cstr + i, len - i, &tis_cell, true); /* !item->fixedPitch); */
+        haveSaraAm  = (cstr[i + cell_length - 1] == (char)0xd3);
+
+        /* set shaper item's log_clusters */
+        logClusters[i] = slen;
+        for (int j = 1; j < cell_length; j++) {
+            logClusters[i + j] = logClusters[i];
+        }
+
+        /* Find Logical Glyphs by font type */
+        switch (font_type) {
+            case TIS: lgn = th_render_cell_tis (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
+            case WIN: lgn = th_render_cell_mac (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
+            case MAC: lgn = th_render_cell_win (tis_cell, rglyphs, sizeof(rglyphs) / sizeof(rglyphs[0]), true); break;
+        }
+
+        /* Add glyphs to glyphs string and setting some attributes */
+        for (int lgi = 0; lgi < lgn; lgi++) {
+            if ( rglyphs[lgi] == 0xdd/*TH_BLANK_BASE_GLYPH*/ ) {
+                //if ( !item->fixedPitch ) {
+                    glyphString[slen++] = C_DOTTED_CIRCLE;
+                    item->attributes[slen-1].dontPrint = true; // FIXME this will hide all dotted circle
+                //}
+            }
+            else {
+                glyphString[slen++] = (HB_UChar16) thai_get_glyph_index (font_type, rglyphs[lgi]);
+            }
+        }
+
+        if (haveSaraAm) {
+            logClusters[i + cell_length - 1] = slen - 1; // Set logClusters before NIKAHIT
+            if (tis_cell.top != 0)
+                logClusters[i + cell_length - 2] = slen - 2; // Set logClusters before NIKAHIT when tis_cell has top
+            if (logClusters[i + cell_length - 1] > slen)
+                logClusters[i + cell_length - 1] = 0;
+        }
+
+        i += cell_length;
+    }
+    glyphString[slen] = (HB_UChar16) '\0';
+
+    /* for check, should reallocate space or not */
+    HB_Bool spaceOK = (item->num_glyphs >= slen);
+
+    /* Convert to Glyph indices */
+    HB_Bool haveGlyphs = item->font->klass->convertStringToGlyphIndices (
+                                          item->font,
+                                          glyphString, slen,
+                                          item->glyphs, &item->num_glyphs,
+                                          item->shaperFlags);
+
+    HB_FREE_STACKARRAY (glyphString);
+
+    if (len >= 128)
+        free(cstr);
+
+    return (haveGlyphs && spaceOK);
+}
+
+/*
+ * set the glyph attributes heuristically.
+ */
+static void HB_ThaiHeuristicSetGlyphAttributes (HB_ShaperItem *item)
+{
+    /* Set Glyph Attributes */
+    hb_uint32 iCluster = 0;
+    hb_uint32 length = item->item.length;
+    while (iCluster < length) {
+        int cluster_start = item->log_clusters[iCluster];
+        ++iCluster;
+        while (iCluster < length && item->log_clusters[iCluster] == cluster_start) {
+            ++iCluster;
+        }
+        int cluster_end = (iCluster < length) ? item->log_clusters[iCluster] : item->num_glyphs;
+        item->attributes[cluster_start].clusterStart = true;
+        for (int i = cluster_start + 1; i < cluster_end; i++) {
+            item->attributes[i].clusterStart = false;
+        }
+    }
+}
+
+/*
+ * THAI Shaping.
+ */
+HB_Bool HB_ThaiShape (HB_ShaperItem *shaper_item)
+{
+    if ( !HB_ThaiConvertStringToGlyphIndices (shaper_item) )
+        return false;
+
+    HB_ThaiHeuristicSetGlyphAttributes (shaper_item);
+
+#ifndef NO_OPENTYPE
+    const int availableGlyphs = shaper_item->num_glyphs;
+    if ( HB_SelectScript (shaper_item, thai_features) ) {
+        HB_OpenTypeShape (shaper_item, /*properties*/0);
+        return HB_OpenTypePosition (shaper_item, availableGlyphs, /*doLogClusters*/false);
     }
+#endif
+
+    HB_HeuristicPosition (shaper_item);
+    return true;
+}
+
+/*
+ * Thai Attributes: computes Word Break, Word Boundary and Char stop for THAI.
+ */
+static void HB_ThaiAssignAttributes(const HB_UChar16 *string, hb_uint32 len, HB_CharAttributes *attributes)
+{
+    char s[128];
+    char *cstr = s;
+    int *break_positions = 0;
+    int brp[128];
+    int brp_size = 0;
+    hb_uint32 numbreaks, i, j, cell_length;
+    struct thcell_t tis_cell;
+
+    if (!init_libthai())
+        return ;
+
+    if (len >= 128)
+        cstr = (char *)malloc(len*sizeof(char) + 1);
+
+    to_tis620(string, len, cstr);
 
     for (i = 0; i < len; ++i) {
         attributes[i].lineBreakType = HB_NoBreak;
         attributes[i].wordBoundary = FALSE;
     }
 
-    for (i = 0; i < numbreaks; ++i) {
-        if (break_positions[i] > 0) {
-            attributes[break_positions[i]-1].lineBreakType = HB_Break;
-            attributes[break_positions[i]-1].wordBoundary = TRUE;
+    if (len > 128) {
+        break_positions = (int*) malloc (sizeof(int) * len);
+        memset (break_positions, 0, sizeof(int) * len);
+        brp_size = len;
+    }
+    else {
+        break_positions = brp;
+        brp_size = 128;
+    }
+
+    if (break_positions) {
+        attributes[0].wordBoundary = TRUE;
+        numbreaks = th_brk((const unsigned char *)cstr, break_positions, brp_size);
+        for (i = 0; i < numbreaks; ++i) {
+            attributes[break_positions[i]].wordBoundary = TRUE;
+            if (break_positions[i] > 0)
+                attributes[break_positions[i]-1].lineBreakType = HB_Break;
         }
+
+        if (break_positions != brp)
+            free(break_positions);
     }
 
-    if (break_positions != brp)
-        free(break_positions);
+    /* manage charStop */
+    i = 0;
+    while (i < len) {
+        cell_length = th_next_cell((const unsigned char *)cstr + i, len - i, &tis_cell, true);
+
+        attributes[i].charStop = true;
+        for (j = 1; j < cell_length; j++)
+            attributes[i + j].charStop = false;
+
+        /* Set charStop for SARA AM */
+        if (cstr[i + cell_length - 1] == (char)0xd3)
+            attributes[i + cell_length - 1].charStop = true;
+
+        i += cell_length;
+    }
 
     if (len >= 128)
         free(cstr);
@@ -105,7 +414,9 @@ static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttri
 void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes)
 {
     assert(script == HB_Script_Thai);
+    const HB_UChar16 *uc = text + from;
     attributes += from;
-    thaiWordBreaks(text + from, len, attributes);
+    HB_UNUSED(script);
+    HB_ThaiAssignAttributes(uc, len, attributes);
 }