fontservices/textshaperplugin/IcuSource/layout/LEFontInstance.cpp
changeset 0 1fb32624e06b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/textshaperplugin/IcuSource/layout/LEFontInstance.cpp	Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,85 @@
+/*
+ *******************************************************************************
+ *
+ *   Copyright (C) 1999-2004, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *
+ *******************************************************************************
+ *   file name:  LEFontInstance.cpp
+ *
+ *   created on: 02/06/2003
+ *   created by: Eric R. Mader
+ */
+
+#include "LETypes.h"
+#include "LEScripts.h"
+#include "LEFontInstance.h"
+#include "LEGlyphStorage.h"
+
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LEFontInstance)
+
+const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit,
+                                                       le_int32 script, LEErrorCode &success) const
+{
+    if (LE_FAILURE(success)) {
+        return NULL;
+    }
+
+    if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {
+        success = LE_ILLEGAL_ARGUMENT_ERROR;
+        return NULL;
+    }
+
+    *offset = limit;
+    return this;
+}
+
+void LEFontInstance::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count,
+                                      le_bool reverse, const LECharMapper *mapper, LEGlyphStorage &glyphStorage) const
+{
+    le_int32 i, out = 0, dir = 1;
+
+    if (reverse) {
+        out = count - 1;
+        dir = -1;
+    }
+
+    for (i = offset; i < offset + count; i += 1, out += dir) {
+        LEUnicode16 high = chars[i];
+        LEUnicode32 code = high;
+
+        if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) {
+            LEUnicode16 low = chars[i + 1];
+
+            if (low >= 0xDC00 && low <= 0xDFFF) {
+                code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
+            }
+        }
+
+        glyphStorage[out] = mapCharToGlyph(code, mapper);
+
+        if (code >= 0x10000) {
+            i += 1;
+            glyphStorage[out += dir] = 0xFFFF;
+        }
+    }
+}
+
+LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
+{
+    LEUnicode32 mappedChar = mapper->mapChar(ch);
+
+    if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) {
+        return 0xFFFF;
+    }
+
+    if (mappedChar == 0x200C/* || mappedChar == 0x200D*/) { //1922 mlyl --> commented 200D for chillu -->
+        return 1;
+    }
+
+    return mapCharToGlyph(mappedChar);
+}
+U_NAMESPACE_END
+