1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/harfbuzz/src/harfbuzz-thai.c b/third_party/harfbuzz/src/harfbuzz-thai.c
new file mode 100644
index 0000000..1d1aa2f
--- /dev/null
+++ b/third_party/harfbuzz/src/harfbuzz-thai.c
@@ -0,0 +1,87 @@
+/*
+ * 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 "harfbuzz-external.h"
+
+#include <assert.h>
+
+static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttributes *attributes)
+{
+    typedef int (*th_brk_def)(const char*, int[], int);
+    static void *thaiCodec = 0;
+    static th_brk_def th_brk = 0;
+    char *cstr = 0;
+    int brp[128];
+    int *break_positions = brp;
+    hb_uint32 numbreaks;
+    hb_uint32 i;
+
+    if (!thaiCodec)
+        thaiCodec = HB_TextCodecForMib(2259);
+
+    /* load libthai dynamically */
+    if (!th_brk && thaiCodec) {
+        th_brk = (th_brk_def)HB_Library_Resolve("thai", "th_brk");
+        if (!th_brk)
+            thaiCodec = 0;
+    }
+
+    if (!th_brk)
+        return;
+
+    cstr = HB_TextCodec_ConvertFromUnicode(thaiCodec, string, len, 0);
+    if (!cstr)
+        return;
+
+    break_positions = brp;
+    numbreaks = th_brk(cstr, break_positions, 128);
+    if (numbreaks > 128) {
+        break_positions = (int *)malloc(numbreaks * sizeof(int));
+        numbreaks = th_brk(cstr, break_positions, numbreaks);
+    }
+
+    for (i = 0; i < len; ++i)
+        attributes[i].lineBreakType = HB_NoBreak;
+
+    for (i = 0; i < numbreaks; ++i) {
+        if (break_positions[i] > 0)
+            attributes[break_positions[i]-1].lineBreakType = HB_Break;
+    }
+
+    if (break_positions != brp)
+        free(break_positions);
+
+    HB_TextCodec_FreeResult(cstr);
+}
+
+
+void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes)
+{
+    assert(script == HB_Script_Thai);
+    attributes += from;
+    thaiWordBreaks(text + from, len, attributes);
+}
+